Thermal stability, dimensional stability, chemical resistance and inherent flame retardancy

Ryton® PPS (polyphenylene sulfide) compounds offer a unique combination of properties and a cost/performance balance unmatched by other engineering thermoplastics:

  • Thermal Stability: A remarkable combination of both long-term resistance to temperatures up to 200°C (392°F) and short-term resistance to temperatures up to 260°C (500° F)
  • Dimensional Stability: Even complex parts could be molded with very tight tolerances and will maintain dimensional stability even at elevated temperatures and and in harsh chemical environment
  • Chemical Resistance: Resistant to a wide variety of solvents and corrosive chemicals even at elevated temperatures
  • Inherent Flame Retardancy: All Ryton® PPS compounds have UL94 V-0 flammability ratings without flame retardant additives

 

What is PPS?

pps-chemical-chain

Poly(p-phenylene sulfide) (PPS) is a polymer made up of alternating sulfur atoms and phenylene rings in a para substitution pattern. The highly stable chemical bonds of its molecular structure impart a remarkable degree of molecular stability toward both thermal degradation and chemical reactivity. The molecular structure also readily packs into a very thermally stable crystalline lattice, hence PPS is a semi-crystalline polymer with a high crystalline melting point of about 285°C (545°F). Because of its molecular structure, PPS also tends to char during combustion, making the material inherently flame retardant. PPS has not been found to dissolve in any solvent at temperatures below about 200°C (392°F).

 

When blended with glass fibers and other fillers, PPS produces engineering plastics having a unique combination of properties including:

  • A remarkable combination of both long-term and short-term thermal stability
  • Exceptionally high modulus and creep resistance
  • Outstanding resistance to a wide variety of aggressive chemical environments
  • Precision molding to tight tolerances with high reproducibility
  • Inherent non-flammability without flame retardant additives
  • Dielectric and insulating properties stable over a wide range of conditions
Where can I obtain Ryton® PPS stock shapes for machining some prototype parts?

Large stock shapes made from Ryton® PPS injection molding compounds are not available because the injection molding compounds are not suitable for producing thick forms. Some specialty compression molding and/or extrusion processors supply PPS rod, sheet, and tube stock, but it is important to understand that parts machined from compression molded PPS rods, sheets, or hollow forms will not necessarily perform the same as parts injection molded from Ryton® PPS injection molding compounds. 

What does "PPS" mean?

PPS stands for Polyphenylene Sulfide.

Does "Linear PPS" make a superior injection molding compound?

We use uncured linear PPS as well as cured PPS in our various Ryton® PPS products, depending on the desired properties of the product. For the most part, we prefer to use cured PPS polymers for injection molding compounds because they provide more of the benefits generally desired from PPS compounds. PPS curing is a process of heating the PPS polymer in air to increase its molecular weight through thermal-oxidative chain extension and cross-linking reactions. Uncured linear PPS will typically have more ductility than cured PPS of similar molecular weight, however cured PPS exhibits better dimensional stability and creep resistance. Furthermore, since any uncured linear PPS polymer will undergo curing when heated in air, cured PPS tends to exhibit less pronounced changes due to thermal aging. Certain compounds made using cured PPS will provide mechanical properties comparable to any compounds based exclusively on uncured linear PPS.

What is branched PPS?

We refer to branched PPS as PPS polymer produced with a branched backbone structure in the polymerization process. Some other PPS producers refer to branched PPS as PPS that has been post polymerization treated by curing. The two resultant structures are different and impart different performance characteristics. We practice both techniques and utilizes whichever type of PPS polymer is best for meeting the desired performance requirements.

Which is better – linear PPS or branched PPS?

The molecular weight and molecular structure of the PPS polymer affect both processing and finished part characteristics, so you cannot say one is "generally better" than the other. A specific part design and processing technique along with finished part requirements should be defined before statements are made about one polymer type being more appropriate than another for a particular application.

What is the color of your material?

Most of our products are available in either "natural" or black color, but some are available only in black. The natural colors of 40% glass fiber reinforced grades can range from dark brown to off white, whereas the natural colors of glass fiber and mineral filled grades generally range from tan to off-white.

How much color variation can I expect to encounter with natural color Ryton® PPS compounds?

Most of our products are available in either "natural" or black color, but some are available only in black. The natural colors of 40% glass fiber reinforced grades can range from dark brown to off white, whereas the natural colors of glass fiber and mineral filled grades generally range from tan to off-white.

Can you tell me if Ryton® PPS is compatible with a certain chemical?

Information on the compatibility of Ryton® PPS with a wide variety of chemicals is available in our Chemical Resistance Guide. If you cannot find the information you need, please contact us. Our chemists can provide opinions about the suitability of Ryton® PPS for particular chemical environments, based on our knowledge of the chemistry of PPS and our compounds. However, testing under conditions as similar as possible to actual service conditions is always the best way to determine chemical compatibility for a particular application.

Is it possible to pigment Ryton® PPS to make it a different color?

The dark brown color of most 40% glass fiber reinforced grades is not amenable to pigmenting any color other than black. Some of the lighter color grades may be pigmented a variety of colors using commercially available color concentrates blended in at the injection molding machine. However, it is important to understand that the parts will not be color stable if exposed to elevated temperatures, UV light, or outdoor conditions. So, pigmenting Ryton® PPS compounds may be useful in some situations for part identification, but is not recommended for cosmetic or decorative purposes. Although Ryton® R-7-120NA PPS and Ryton® R-7-190NA PPS have UL "All Color" listings when used in conjunction with PPS-based color concentrates, the addition of pigments may void the UL certifications of other Ryton® PPS compounds. In general, if color stability and consistency is required, black color Ryton® PPS compounds should be used.

Will a crystalline part or an amorphous part have better properties?

Ryton® PPS in the crystalline state provides better performance in the areas for which PPS is usually chosen. Although amorphous PPS moldings may have somewhat better mechanical strength, crystalline PPS moldings will have higher modulus (stiffness), better creep resistance, and better high temperature dimensional stability. Furthermore, amorphous PPS parts may deform when exposed to temperatures above about 88°C (190°F).

Is there some way to determine whether a Ryton® PPS part is crystalline or amorphous?

Yes. The crystalline or amorphous state of the PPS polymer may be determined by Differential Scanning Calorimetry (DSC). Contact our technical specialists for support.

Does Ryton® PPS contain any halogenated flame retardants?

No. Since polyphenylene sulfide is inherently flame retardant, Ryton® PPS compounds can achieve UL94 V-0 and V-0/5VA flammability ratings without any flame retardant additives.

Do you have any "FDA approved" grades of Ryton® PPS?

Ryton® PPS injection molding compound R-4-232NA complies with U.S. FDA and European Union (EU 10/2011 and 1183/2012) regulations for use as components of articles intended for repeat use in contact with all types of foods. Additionally, in accordance with U.S. FDA Food Contact Notification (FCN) 1083, all Ryton® PPS production polymers may be used as components in the manufacture of articles for repeat-use food-contact applications, in contact with all types of food, under Conditions of Use A-H, and J, and also meet EU 10/2011 and 1183/2012 requirements. 

Polyphenylene sulfide resins are also specifically permitted under 21 CFR 177.2490 as coatings or components of coatings of articles intended for repeated food contact use, subject to certain limitations. Several Ryton® PPS injection molding compounds have also been certified to comply with the requirements of various standards for use in contact with potable water. It is the responsibility of the manufacturer of the final article to determine the safety and suitability of Ryton® PPS for such applications.

Do any of your Ryton® PPS products contain a fluoropolymer lubricant such as PTFE?

Ryton® BR42B PPS contains PPS blended with PTFE (polytetrafluoroethylene) for improved surface lubricity.

Is Ryton® PPS suitable for use in applications where it is exposed to ultraviolet (UV) light?

Although exposure of Ryton® PPS to UV light may cause some surface degradation, the properties of the bulk material will be relatively unaffected. Several Ryton® PPS compounds have been rated suitable for outdoor use with respect to UV light exposure, water exposure and water immersion, in accordance with UL746C.

Does Ryton® PPS meet the fungus resistance requirements of military specification (MIL-STD-45-4)?

Yes, two Ryton® PPS products, R-4 and R-4-02XT, have been evaluated by an independent laboratory (Truesdail Laboratories, Inc.) in accordance to MIL-STD-810D test method 508.3 and found not to allow fungus growth. The study was conducted over the prescribed twenty-eight days with the five fungi required by the test method. Observations were taken every seven days. No fungus growth was observed on the Ryton® PPS test specimens.

Do you have a chart cross-referencing the different Ryton® PPS compounds with PPS compounds from other manufacturers?

We have no literature that cross-references our products with those of other suppliers. If you would like to substitute some other supplier's product with a Ryton® PPS compound, but are unsure which Ryton® PPS compound to use, please contact us.

Is it really necessary to use a mold temperature of 275°F (135°C)? We are able to reach temperatures of 200°F to 250°F (93°C to 121°C) using hot water. Is this sufficient?

We generally advise using a mold surface temperature of 275°F to 300°F (135°C to 149°C) to achieve a near maximum degree of crystallinity for optimum long-term thermal stability, dimensional stability, and consistent part performance. Consult the Ryton® PPS Processing Guide for more information on this issue.

In our injection molding facility, we have several methods to heat our molds: circulating water or oil, and electric cartridges. Do you recommend one of these methods in particular for molding Ryton® PPS?

Yes, hot oil should be used to heat and cool molds when molding Ryton® PPS thermoplastic compounds. Remember, we typically advise molding Ryton® PPS in a mold with surface temperatures of 275-300°F (135-149°C). Because this is well above the boiling point of water, using water to heat and cool the mold to 275°F (135°C) results in very high line pressures and a potential safety hazard. On the other hand, the typical line pressure for oil heating/cooling systems is about 30 psig (2.1 bar). Electric cartridges do not offer the temperature control provided by oil systems. Oil systems are capable of both heating and cooling the mold, resulting in more consistent mold temperatures and improved shot-to-shot consistency.

Can Ryton® PPS still be used after it has been in a dryer longer than the recommended period of time?

We have conducted tests on drying Ryton® R-4 PPS at 300°F (149°C) and found that the initial melt flow of 28.7 g/10 min varied from a low of 26.0 g/10 min to a high of 30.0 g/10 min, up to 96 hrs. If, however, your drying temperature was too high (400°F, 204°C), the melt flow would decrease from 28.7 g/10 min to 13.9 g/10 min. Therefore, if your dryer is set at 300°F (149°C) or lower, you should have no problem using that material.

What is the recommended moisture content level for Ryton® PPS compounds?

Although we have no recommended moisture level, Ryton® PPS compounds will be more readily processed if dried thoroughly. Less than 0.02% moisture should be sufficient, and following our standard drying recommendations (300-350°F, 149-177°C for 2 to 3 hours) should accomplish this. Longer drying times are not harmful, but temperatures above 400° F (204°C) may reduce melt flow. The resin itself is not hygroscopic, but some mineral fillers may be, so drying is particularly important for mineral filled compounds.

If I need to briefly interrupt production, should I purge the Ryton® PPS from the barrel of my machine?

At normal processing temperatures (600-650°F, 315-343°C melt temperature), Ryton® PPS compounds may be allowed to remain in the barrel for up to two hours without suffering any detrimental effects.

I need to recover some molded-in inserts from some reject parts. Is there a solvent I can use to dissolve away the PPS?

Unfortunately, recovery of molded-in inserts from Ryton® PPS parts is not practical. There is no known solvent for PPS at temperatures below 200°C (392°F), and acids that will degrade the PPS polymer will also likely damage inserts. It is possible to burn away the PPS (with a torch or using a muffle furnace, for example) if the inserts can withstand the temperatures required (over 815°C, 1500°F). If possible, a metal insert may be heated to melt the surrounding PPS (about 316°C, 600°F) to facilitate its removal, but there will still be residual PPS to be removed. Molten PPS can usually be removed using a wire brush or scouring pad. Like chipping or breaking the PPS away from the inserts, these operations generally can not be accomplished without damaging the inserts.

Do you have the properties required for a finite element stress analysis?

Yes. Stress-strain curves and elevated temperature data are available for the most commonly used products. Please contact one of our Technical Service Centers to request the data you need.

Do you have the material parameters required for conducting a flow simulation?

Yes, the material parameters have been developed for the most commonly used products. This includes PVT data which is needed for warpage analysis. Please contact one of our Technical Service Centers to request the data you need.

What types of adhesives are best for bonding Ryton® PPS?

Despite the chemically non-reactive nature of PPS, there are adhesives that will bond PPS providing the surface is properly prepared. Acrylic, cyanoacrylate, and two-part epoxy type adhesives have generally been found to work best with PPS, however surface treatments are often required to attain adequate bond strengths. For more information on this topic see our technical bulletin on Adhesives and Paints for Ryton® Polyphenylene Sulfide. We also suggest contacting adhesive manufacturers regarding their latest recommendations for adhesives that are effective at bonding PPS.

What is the recommended gap for venting around an ejector pin?

Molds for Ryton® PPS compounds may be vented by a 0.0005 inch (0.0125 mm) gap around the radius of the pin (0.001 in, 0.025 mm reduction in diameter). Venting also may be accomplished by flattening pins 0.0007 inches (0.0175 mm) on one to four sides.

I'm analyzing a plastic housing that is attached to an aluminum part. I was told that the coefficient of linear thermal expansion (CLTE) for Ryton® PPS was close to that of aluminum. Is that correct?

The CLTEs of different Ryton® PPS compounds vary, but in general they are close to that of aluminum in the flow direction. Transverse to flow the CLTEs are higher than aluminum. If large temperature variations are expected, the assembly should be analyzed to determine if problems exist.

I was considering PPS for an injection molded part, but I've heard the material doesn't flow very well. Is this true?

Absolutely not! In fact, Ryton® PPS compounds have some of the best flow characteristics of all high temperature engineering thermoplastics. They are used extensively in the connector industry, where part thicknesses of 0.50 mm to 0.75 mm (0.020 to 0.030 inch) are commonplace.

Ryton® PPS (polyphenylene sulfide) delivers exceptional inherent thermal stability, dimensional stability, chemical resistance, and flame resistance, combined with excellent mechanical and electrical properties. Ryton® PPS injection molding compounds also possess the excellent processing characteristics necessary to meet demanding, high precision applications.

 

Design & Processing Guides

Ryton® PPS Design Guide

Ryton® PPS Processing Guide

Ryton® PPS Processing Guide for High-Performance Fibers

 

Technical Bulletins

Blending Color Concentrates with Ryton® PPS

Bonding Adhesives and Paints to Ryton® PPS

Comparison of Ryton® PPS Types

Drying Solvay Specialty Polymers Resins

Extending Tool Life Through Abrasion Resistant Steels and Surface Treatments

Heat Staking of Ryton® R-4 and Ryton® R-7

Importance of Mold Temperature on the Properties of PPS Parts

Machining Ryton® PPS Compounds

Processing Comparison of Ryton® PPS R, BR, XE and XK grades

Ryton® PPS High-Temperature, Non-Stick, Corrosion Resistant Coatings

Ryton® PPS Injection Molding

Ryton® PPS Resistance to Hot Chlorinated Water

Ryton® PPS XE Injection Molding

Ryton® PPS XE Pipe Extrusion

Ryton® PPS XE Sheet Extrusion

Ryton® PPS XE Tube Extrusion

Ryton® PPS XK Injection Molding

Screw and Barrel Construction for Injection Molding Ryton® PPS

Ultrasonic Welding Ryton® PPS Compounds

 

Technical Data Sheets

Ryton® PPS Polymers
P-6 PR11L PPS powders for high temperature chemical resistant coatings; slurry spray, electrostatic spray, flocking or fluidized bed application.
V-1
QA200N QA200P Unfilled PPS for Injection Molding
QC160N QC160P Unfilled PPS for Profile Extrusion
QC220N QC220P PPS Resins for Heat and Chemical Resistant Staple and Monofilament Fiber Spinning
QC200N QC200P PPS Resins for Heat and Chemical Resistant Monofilament Fiber Spinning
Ryton® Glass Fiber and Mineral Filled PPS Compounds
BR111 BR111BL Creep resistance, high hodulus, dimensional stability.
R-7-120NA R-7-120BL 220°C/240°C UL RTI, arc resistance, lower cost, dimensional stability.
R-7-121NA R-7-121BL 220°C/240°C UL RTI, arc resistance, lower cost, dimensional stability, good flow.
R-7-220BL Hydrolytic Stability, Creep Resistance, High Modulus, Dimensional Stability.
Ryton® 40% Glass Fiber Reinforced PPS Compounds
BR42B Low friction, high wear resistance.
R-4 R-4-02 General purpose.
R-4-200NA R-4-200BL Enhanced strength and toughness.
R-4-220NA R-4-220BL Exceptional resistance to hot water and engine coolants.
R-4-230NA R-4-230BL Low flash, high flow, good strength.
R-4-232NA High flow, low flash; Meets requirements for food contact.
R-4-240NA R-4-240BL Enhanced toughness; Stress crack resistance.
R-4XT R-4-02XT Improved strength.
Ryton® PPS Alloy Compounds
XE4050BL High impact strength, good thermal stability.
XE5030BL High impact strength, high flow, good thermal stability. 
XE5515BL Blow molding and extrusion.
XK2340 High strength, exceptionally high flow, precision molding.
Automotive

Ryton® PPS is an ideal choice for automotive parts exposed to high temperatures, automotive fluids, or mechanical stress. Typical applications include under hood components, brake systems, and electrical/electronic devices requiring high heat resistance, high dimensional stability, and corrosion resistance. Ryton® PPS is a lighter weight alternative to metals that is resistant to corrosion by salts and all automotive fluids. The ability to mold complex parts to tight tolerances and insert molding capability accommodate multiple component integration. See how Ryton® PPS can help you meet your fuel economy requirements, system integration goals and cost targets.

For more information on automotive material certifications and ASTM callouts, see Industry Certifications.

Applications Product Performance Benefits
Air Management      

Change air cooler housings, electronic throttle control, gasoline/diesel throttle body, hot air ducts, hot air inlets, intake manifolds, turbocharger components

R-4-200BL* Toughness, High strength Weight reduction, hollow components, smooth internal surface, reduced manufacturing cost.
  BR111BL* Dimensional stability, Creep resistance  
  XK2340 Impact resistance  
Brake Systems      

ABS brake pistons, ABS brake sensor, ABS motor components, booster pistons, electric brakes, ESC - connecting plunger, vacuum pump components, valve bodies

BR111BL* Dimensional Stability, Creep Resistance Temperature and chemical resistance
  R-7-120BL* Dimensional Stability, Creep Resistance  
  R-4-200BL* Toughness, High Strength  
Electrical/Electronics Components      

Alternator components, brush holder for motors, bus bars, connectors, housings, ignition components, lead frames, motor components, resolvers, sensors, switches, terminals

R-4-200BL* Toughness, High strength Precision moldability, flame retardancy, good electrical properties, thermoset replacement, thermal shock resistance.
  BR111BL* Dimensional stability, Creep resistance  
  R-7-120BL* High voltage, low cost  
  BR42B Lubricity, Low friction  
  XK2340 High flow, elongation  
  XE5030BL Impact resistance  
Emissions Technology      

EGR (exhaust gas recirculation), EGR valves, EGR solenoids, SCR (selective catalytic reduction)

R-4-200BL* Toughness, High strength Weight reduction, hollow components, smooth internal surface, reduced manufacturing cost.
  BR111BL* Dimensional stability, Creep resistance  
  XK2340 Impact resistance  
Engine Components      

Camshafts, component housings, deactivator, engine mounts, gasket carriers, heat shield, seal housings, throttle body

R-4-200BL* Toughness, High strength Metal replacement, weight reduction, reduced manufacturing cost.
  BR111BL* Dimensional stability, Creep resistance  
  XK2340 Impact resistance  
Fuel Systems      

Filter housings, fuel injectors, fuel line connectors/quick connects, fuel pump caps, fuel pump impellers, fuel rails, injector bobbins, low-permeation evaporation harnesses

R-4-200BL* Toughness, High strength Improved corrosion resistance, reduced manufacturing cost, weight reduction.
  BR111BL* Dimensional stability, Creep resistance  
  XK2340 Impact resistance  
  XE5030BL Impact resistance, Elongation  
Lighting      

Projector headlight reflector , sockets

R-7-120BL* Dimensional Stability, Creep Resistance  
Powertrain       
Engine gasket carriers, lock-up collars, seal housings, servo covers, servo pistons, shift cams/forks, stators BR111BL* Dimensional Stability, Creep Resistance &nbps;
Pumps      

Air pumps, fuel pumps, fuel pump end caps, fuel pump impellers, oil pumps, oil pump vanes, vacuum pumps, vacuum pump vanes, water pumps, water pump housings, water pump impellers

BR111BL* Dimensional stability, Creep resistance, Strength Precision moldability, metal replacement, weight reduction, reduced manufacturing cost (no machining, reduced secondary operations).
  R-4-200BL* Toughness, High strength  
  R-7-220BL Strength, Hydrolytic stability  
  R-4-220BL* Hydrolytic stability  
Thermal Management      

Coolant systems, coolant tube, crossover/connector, flow meters, heater core tanks, thermostat housing, water pump cap, water pump impellers

R-4-200BL* Toughness Corrosion resistance, precision mold ability, metal replacement, weight reduction.
  R-4-220BL* Hydrolytic stability  
  R-7-120BL* Dimensional stability, Creep resistance  
  R-7-220BL Strength, Hydrolytic stability  
  BR42B Lubricity, low wear  
Transmission Components      

Servo pistons, servo covers, shifting mechanisms, thrust washer, transmission sensor

R-4-200BL* Toughness, High Strength Metal replacement, weight reduction, reduced manufacturing cost.
  R-7-120BL* Dimensional Stability, Creep Resistance  
  XK2340 Impact resistance  

* Designation is for black color; equivalent grade is available in natural.

Electrical/Electronics

Ryton® PPS offers superb value for your electrical/electronic applications. It features excellent flow and low shrinkage for precision molding of connectors and sockets, superior stiffness and mechanical integrity for reliable assembly, and is one of the most stable material choices for all SMT soldering methods. Ryton® PPS compounds have UL94 V-0 flammability ratings without the use of flame retardant additives. Special low flash grades have been developed to meet the needs of high precision molding applications. Let Ryton® PPS help you meet the design challenge for reliable, high precision electrical devices and electronic components.

Applications Product Performance Benefits
Connectors

Connectors: 3 in 1 combo, AGP, SCSI, PATA, SATA, SAS, hard disc drives, fiber optic, telecom, aerospace, transportation and surface mount.

R-4-200NA* High Strength, weld line Stable at IR and lead-free convection soldering temperatures, cost effective, superior pin retention, UL 94 V-0, good flow, low out- gassing, creep resistance and dimensional stability.
R-4-230NA* High flow, low flash
BR42B Low friction
Sockets

PLCC, BGA locking arm, PGA, DIMM, burn-in, test fixtures, through hole and surface mount.

R-4-200NA* High Strength, weld line Stable at IR and convection soldering temperatures, superior pin retention, cost effective, UL 94 V-0, good flow and superior weld-line strength vs. LCP.
R-4-230NA* High flow, low flash
BR42B Low friction
Relays/Switches/Circuit Breakers

High temperature housings, insulating components, wiring devices, and micro-switches.

R-4-200NA* High Strength, weld line Excellent high temperature dimensional stability, high modulus, cost effective versus thermosets, good electrical properties, fast cycling, high creep resistance.
R-4-230NA* High flow, low flash
R-7-120NA* Low cost
BR111* High strength, low cost
BR42B Wear resistance
Encapsulation/Packaging

Transistors, capacitors, sensors. Multi-chip modules, potting cups, power converters, NEMA housing.

R-4-200NA* High Strength, weld line Fast cycling, good adhesion, very low moisture absorption, cost effective, UL 94 V-0, high creep resistance, lead free solder stable.
R-4-230NA* High flow, low flash
R-7-120NA* Low cost
Bobbins/Coils

Microwave, power control modules, printer heads.

R-4-220NA* Hydrolytic stability Good dimensional stability, high stiffness and strength, low moisture absorption.
R-7-120NA* Low cost
R-7-121NA* Low cost, high flow
Consumer Electronics

HDD and server, ACA over molds, and bobbins, CD/DVD optical pick-up components, HDTV and projection light engine housings, and ink jet cartridges.

R-4-230NA* Low flash, UL/UV F1 High dimensional stability, precision moldability, low out gassing, UL 94 V-0 and 240°C UL RTI, low moisture absorption, good weld line strength and cost effective.
R-4XT* Elongation, ductility
R-7-120NA* Light axis stable
BR111* Light axis stable

* Designation is for natural color; equivalent grade is available in black.

Industrial

The unique combination of properties inherent in Ryton® PPS find utility in a variety of heavy industrial applications, including some outside the arena of reinforced injection molding compounds. The thermal stability and broad chemical resistance of Ryton® PPS make it exceptionally well suited to service in very hostile chemical environments. Besides molded parts, Ryton® PPS polymer finds unique applications in fiber extrusion as well as in non-stick and chemical resistant coatings. We also provide a wide variety of neat PPS polymers as feedstocks for custom compounding and compression molding processes. Consider how Ryton® PPS can meet your demanding performance requirements.

Applications Product Performance Benefits
Coatings

Non-stick cookware, corrosion resistant industrial

PR11 
V-1 
P-6
Chemical Resistance Chemical and temperature resistance
Fibers

Filter bags, braided sleeving, dryer belts, filters

QC200N 
QC200P 
QC220N 
QC220P
Chemical Resistance Chemical and temperature resistance
Oil Field Equipment

Lift and centrifugal pump components, oil patch drop ball, rod guides, rod scrapers

R-4-200BL Chemical Resistance Chemical and temperature resistance
Pumps

Housing, vanes, impellers, shafts

R-7-120BL Hot Water / Chemical Resistance Hot water, chemical and temperature resistance
BR42B Low Friction
Valves

Diverters, ball valves, seats/seals

BR42B Low Friction Hot water and temperature resistance
Appliances

Ryton® PPS is the answer for many difficult production, design, and performance considerations. Ease of processing and recyclable scrap allow for part consolidation, more efficient manufacturing, and material savings. Ryton® PPS produces more reliable parts using less material by offering a combination of high temperature stability, excellent mechanical strength and dimensional integrity, along with resistance to corrosion by common solvents, caustic solutions, and dilute acids. Discover how the combination of processability and performance provided by Ryton® PPS can generate a cost savings compared to using metals, thermosets, or other engineering materials.

Applications Product Performance Benefits
Pump Housings/Impellers      

Pump housings, impellers and impeller sleeves, bearings, bearing seats

R-4-200NA* Dimensional Stability Low creep, highly reproducible parts, excellent dimensional stability under stress, temperature and chemical exposure, excellent ceramic/metal replacement.
  R-4-220NA* Hot Water Stability  
  BR111* High strength, Low cost  
  R-7-220BL Strength, Hot Water Stability  
  BR42B Low Friction  
Electrical / Electronic Components      

High temperature circuit breakers, relay housings, connectors, bobbins, coil encapsulation

R-7-120NA* High UL Ratings UL 94 V-0, good electrical properties, fast cycling, thermoset replacement, excellent weld line strength, low moisture absorption.
  R-4-200NA* Strength in thin walls  
  R-4-230NA* High flow, Low flash  
Motor Brush Cards      

Brush holders, electronic brush cards, fractional HP motor end rings

R-4-200NA* High strength UL 94 V-0 up to 5VA, good electrical properties, excellent processability, high temperature exposure.
  R-4-230NA* High flow, Low flash  
  R-7-120NA* Low Cost  
Fans & Blowers      

Brush holders, electronic brush cards, fractional HP motor end rings

R-4-200NA* High strength Metal replacement for material cost and weight savings.
  BR111* Dimensional stability  
  R-7-120NA* Low Cost  
Small Appliances      

Electric blanket thermostat control, fry pan handles, hair dryer grill, coffee warmer rings, curling iron insulators, steam iron valves, toaster switches

R-7-120BL Dimensional stability  
Heat Exchangers      

Flue collectors, flue covers, venturi pipes, flow meter housings, transition pipe

R-4-200NA* High strength Metal replacement, cost savings, high mechanical strength and dimensional stability during thermal cycling.
  BR111* High strength, Low cost  
  R-7-120NA* Low cost  
  V-1 Coatings Chemical Resistance  
Thermostat Housings      

Thermostat housings, air gas and water valves, electric heat element screw plug

R-4-200NA* High strength Insert molding, metal replacement, integration of parts, dimensional stability over wide thermal extremes.
  R-4-220NA* Hot water stability  
  BR111* Strength, Low cost  
  R-7-220BL Strength, Hot Water Stability  
Water Management      

Hot water valves, mixer cartridges, hot water manifolds

R-7-120BL BS 6920 certified Dimensional, thermal, and hydrolytic stability, chemical resistance.
  R-4-220NA* NSF Standard 61  
  R-4-200NA* BS 6920 certified  
  BR111BL KTW/BS 6920 certified  
Business Machines      

Printer paper guards, copier gears, fax machine heads, medical/scientific instruments

R-7-120NA* Dimensional stability  
HVAC      

Blower housing, compressor mufflers, flue collector, secondary heat exchanger header, fuel oil pumps, hot water circulation components, motor relays/switches, power vent components, thermostat components

R-4-200NA* Dimensional stability Thermal stability, chemical resistance, dimensional stability
  BR111* Thermal stability  
Lighting      

Reflector housing, socket bases, ballast components

R-7-120NA* Dimensional stability Dimensional and thermal stability, metal and thermoset replacement for material cost and weight savings
Major Household      

Motor brush holders, dryer switches, defroster plugs, washer pump impellers, terminal blocks, microwave oven turntables

R-7-120NA* Dimensional stability  

*Designation is for natural color; equivalent grade is available in black

The chemical resistance of Ryton® PPS is well known to be outstanding, even at elevated temperatures. However, being an organic polymer, PPS can be affected by some chemicals under certain conditions. Over the years, we have accumulated a large database on exposure of Ryton® PPS to a wide variety of chemicals. Although it is not possible to test every chemical, we have seen that chemicals having similar structures and/or properties tend to have similar effects on Ryton® PPS compounds. Therefore, we are able to provide some general advice about the compatibility of Ryton® PPS molding and extrusion compounds with entire classes of chemicals.

Chemical resistance properties among the various Ryton® PPS compounds are quite similar with limited exceptions: acids may have greater impact on compounds containing mineral fillers; certain glass-fiber reinforced grades of Ryton® PPS compounds are specially formulated for superior performance hot water.

Performance will vary depending on particular chemicals used, particular conditions of service and particular compounds used. Temperature and duration of exposure are critical factors that must be considered when determining the degree of chemical resistance required for a particular application. If you require further information, our technical experts can provide opinions about the compatibility of Ryton® PPS compounds or Ryton® PPS Alloy compounds with particular chemical environments.

Chemical Compatibility

An extensive alphabetical list of chemicals with our best general recommendations regarding their compatibility with Ryton® PPS compounds.

Chart Legend

The chart below provides an alphabetical list of chemicals along with our best general recommendations regarding their compatibility with Ryton® PPS compounds. The type face in which the chemical name is printed indicates the extent of available test data:

  • [1]: extensive, long-term test data
  • [2]: We have no actual test data, our recommendations are based on compatibility similar chemicals
  • All others: We have limited, short-term test data


Chemical compatibility is expressed in four general classifications:

  • Acceptable: suitable for extensive exposure even at elevated temperatures
  • Questionable at Elevated Temperatures: caution against extensive exposure to these chemicals at temperatures above 65°C (150°F)
  • Avoid Use of Mineral Filled Grades: acidic chemicals are likely to dissolve common mineral fillers
  • Avoid Exposure: not recommended to use in service with these chemicals except under the limitations cited

 

Chemical Compatibility Chart

Chemical Recommendation
Acetaldehyde [2] Acceptable
Acetic Acid, 10% Acceptable
Acetic Acid, 100% (Glacial) Acceptable
Acetic Anhydride Acceptable
Acetone [2] Acceptable
Acetonitrile Acceptable
Acetophenone Questionable at Elevated Temperatures
Acetyl Chloride Questionable at Elevated Temperatures
Acetylene [2] Acceptable
Acid Mine Water [2] Acceptable
Acrylic Acid [2] Acceptable
Aluminum Chloride Acceptable
Aluminum Sulfate Acceptable
2-Aminoethanol Questionable at Elevated Temperatures
Ammonia, anhydrous [2] Questionable at Elevated Temperatures
Ammonium Chloride Acceptable
Ammonium Hydroxide Acceptable
Ammonium Nitrate Acceptable
Ammonium Sulfate Acceptable
Amyl Acetate Acceptable
Amyl Alcohol Acceptable
Antifreeze [1] Acceptable
Aniline [1] Questionable at Elevated Temperatures
Aqua Regia Avoid Exposure
Asphalt Emulsions [2] Acceptable
Barium Chloride Acceptable
Barium Hydroxide [2] Acceptable
Barium Sulfate [2] Acceptable
Benzaldehyde [1] Questionable at Elevated Temperatures
Benzene [2] Questionable at Elevated Temperatures
Benzene Sulfonic Acid Questionable at Elevated Temperatures
Benzoic Acid [2] Questionable at Elevated Temperatures
Benzonitrile [1] Questionable at Elevated Temperatures
Benzoyl Chloride [2] Questionable at Elevated Temperatures
Benzyl Chloride Questionable at Elevated Temperatures
Black Liquor (from pulpwood) [2] Acceptable
Borax Acceptable
Brake Fluid [1] Acceptable
Bromine [1] Avoid Extensive Exposure above 0.1%
Butadiene [2] Acceptable
Butane [2] Acceptable
2-Butanone (Methyl Ethyl Ketone) [1] Acceptable
Butyl Acetate Acceptable
n-Butyl Alcohol [1] Acceptable
Butyl Ether [1] Acceptable
Butyl Phthalate Questionable at Elevated Temperatures
Butylamine [1] Questionable at Elevated Temperatures
Butylene [2] Acceptable
Calcium Chloride Acceptable
Calcium Nitrate Acceptable
Calcium Sulfate [2] Acceptable
Carbon Dioxide Acceptable
Carbon Disulfide [2] Acceptable
Carbon Tetrachloride [1] Questionable at Elevated Temperatures
Carbonated Water [2] Acceptable
Carbonic Acid [2] Acceptable
Cellosolve Acceptable
Chlorine [1] Avoid Extensive Exposure above 0.1%
Chlorobenzene Questionable at Elevated Temperatures
2-Chloroethanol Questionable at Elevated Temperatures
Chloroform [1] Questionable at Elevated Temperatures
Chlorophenol, 5% Aqueous Acceptable
Chlorosulfonic Acid Avoid Extensive Exposure
Chromic Acid Avoid Extensive Exposure
Clorox (5.25% Sodium Hypochlorite) [1] Acceptable
Copper Chloride Acceptable
Copper Sulfate [2] Acceptable
Cottonseed Oil [2] Acceptable
m-Cresol Questionable at Elevated Temperatures
Cresyl Diphenyl Phosphate [1]  
Crude Oil (aromatic) [1] Acceptable
Cyclohexane Acceptable
Cyclohexanol [1] Acceptable
Cyclohexanone Acceptable
Detergents [2] Acceptable
1,2- Dichloroethane [1] Questionable at Elevated Temperatures
Dichloromethane Questionable at Elevated Temperatures
Diesel Fuel [1] Acceptable
Diethanolamine, 25% [1] Questionable at Elevated Temperatures
Diethyl Ether [2] Acceptable
Diisobutylene Acceptable
Dimethyl Phthalate Questionable at Elevated Temperatures
Dimethyl Sulfoxide Acceptable
Dimethylaniline Questionable at Elevated Temperatures
N,N-Dimethylformamide Acceptable
Dioctyl Phthalate Questionable at Elevated Temperatures
p-Dioxane [1] Acceptable
Diphenyl Ether [2] Questionable at Elevated Temperatures
Dowtherm [1] Acceptable
Engine Oil [1] Acceptable
Epichlorohydrin Questionable at Elevated Temperatures
Ethane [2] Acceptable
Ethanolamine Questionable at Elevated Temperatures
2-Ethoxyethanol Acceptable
Ethyl Acetate [1] Acceptable
Ethyl Alcohol (Ethanol) [1] Acceptable
Ethyl Chloride [2] Questionable at Elevated Temperatures
Ethyl Ether [2] Acceptable
Ethyl Mercaptan [2] Acceptable
Ethylene [2] Acceptable
Ethylene Chloride Questionable at Elevated Temperatures
Ethylene Chlorohydrin Questionable at Elevated Temperatures
Ethylene Dichloride Questionable at Elevated Temperatures
Ethylene Glycol [1] Acceptable
Ethylene Glycol Monoethylether Acceptable
Ethylenediamine Questionable at Elevated Temperatures
Ferric Chloride Acceptable
Ferrous Chloride [2] Acceptable
Fluorosilicic Acid, 25% Acceptable
Formaldehyde Acceptable
Formic Acid Acceptable
Freon [1] Questionable at Elevated Temperatures
Fuel Oil [2] Acceptable
Furan Acceptable
Furfural Acceptable
Gasohol (Gasoline/Alcohol) Acceptable
Gasoline [1] Acceptable
Glycolic Acid Acceptable
Heptane Acceptable
Hexane [2] Acceptable
Hexene [2] Acceptable
HFC-134a Questionable at Elevated Temperatures
Hydraulic Fluid, Aircraft [1] Acceptable
Hydrazine [2] Questionable at Elevated Temperatures
Hydrobromic Acid [2] Avoid Extensive Exposure above 0.1%
Hydrochloric Acid [1] Avoid Extensive Exposure above 0.1%
Hydrofluoric Acid Avoid Extensive Exposure above 0.1%
Hydrogen Gas [2] Acceptable
Hydrogen Peroxide [2] Avoid Extensive Exposure above 5%
Hydrogen Sulfide Acceptable
Iodine [2] Avoid Extensive Exposure above 0.1%
Isopropyl Alcohol Acceptable
Isopropyl Mercaptan [2] Acceptable
Jet Fuel Acceptable
Kerosene Acceptable
Lactic Acid Acceptable
Liquefied Petroleum Gas (LPG) [2] Acceptable
Lithium Bromide [2] Acceptable
Lubricating Oil [2] Acceptable
Magnesium Chloride Acceptable
Magnesium Hydroxide [2] Acceptable
Methane [2] Acceptable
Methoxy Propanol [1] Acceptable
Methyl Acrylate [2] Acceptable
Methyl Alcohol (Methanol) [1] Acceptable
Methyl Ethyl Ketone [1] Acceptable
Methyl Isobutyl Ketone Acceptable
Methyl Mercaptan [2] Acceptable
Methyl Methacrylate [2] Acceptable
Methyl tert-Butyl Ether (MTBE) Acceptable
Methylene Chloride Questionable at Elevated Temperatures
N-Methylpyrrolidinone [1] Questionable at Elevated Temperatures
Mineral Oil Acceptable
Morpholine Questionable at Elevated Temperatures
Motor Oil [1] Acceptable
Naphtha [2] Acceptable
Naphthalene [2] Questionable at Elevated Temperatures
Nitric Acid [1] Avoid Extensive Exposure above 0.1%
Nitrobenzene [1] Questionable at Elevated Temperatures
Nitrogen Acceptable
Nitrogen Tetroxide [2] Avoid Extensive Exposure above 0.1%
Nitromethane Questionable at Elevated Temperatures
Ozone [1] Avoid Extensive Exposure above 100 ppm
Perchloroethylene [2] Questionable at Elevated Temperatures
Peroxyacetic Acid [2] Avoid Extensive Exposure above 1%
Peroxybenzoic Acid [2] Avoid Extensive Exposure above 1%
Phenol [1] Questionable at Elevated Temperatures
Phosphoric Acid [1] Avoid Use of Mineral Filled Grades
Phosphorus Trichloride Acceptable
Potassium Chloride [2] Acceptable
Potassium Dichromate Avoid Extensive Exposure above 0.1%
Potassium Hydroxide [2] Acceptable
Potassium Permanganate Avoid Extensive Exposure above 0.1%
Propane [2] Acceptable
Propyl Mercaptan [2] Acceptable
Propylene [2] Acceptable
Propylene Chlorohydrin [2] Questionable at Elevated Temperatures
Propylene Glycol Monomethylether [1] Acceptable
Pyridine Questionable at Elevated Temperatures
Rapeseed (Rape) Oil [2] Acceptable
Rape Oil Methyl Ester [2] Acceptable
Refrigerant R-22 [1] Questionable at Elevated Temperatures
Sodium Acetate Acceptable
Sodium Bicarbonate Acceptable
Sodium Bisulfate Acceptable
Sodium Carbonate Acceptable
Sodium Chloride Acceptable
Sodium Cyanide [2] Acceptable
Sodium Dichromate Avoid Extensive Exposure above 0.1%
Sodium Hydrosulfite [2] Acceptable
Sodium Hydroxide [1] Acceptable
Sodium Hypochlorite [1] Avoid Extensive Exposure above 5%
Sodium Nitrate Acceptable
Sodium Sulfate Acceptable
Sodium Sulfide Acceptable
Sodium Thiosulfate Acceptable
Steam Acceptable
Stoddard Solvent Acceptable
Sulfolane Acceptable
Sulfur Dioxide [2] Acceptable
Sulfuric Acid [1] Avoid Use of Mineral Filled Grades
Tetrahydrofuran Acceptable
Thiophenol [2] Questionable at Elevated Temperatures
Toluene [1] Questionable at Elevated Temperatures
Tomato Juice Acceptable
Transmission Fluid [1] Acceptable
Trichloroacetic Acid Questionable at Elevated Temperatures
1,1,1-Trichloroethane Questionable at Elevated Temperatures
Trichloroethylene Questionable at Elevated Temperatures
Trichlorotrifluoroethane Questionable at Elevated Temperatures
Triethyl Phosphate Acceptable
Triethylamine Questionable at Elevated Temperatures
Triphenyl Phosphite Questionable at Elevated Temperatures
Trisodium Phosphate Acceptable
Turpentine Acceptable
Vegetable Oil Acceptable
Vinegar Acceptable
Water Acceptable
Water: Salt Water, Sea Water, Tap Water Acceptable
Xylene Questionable at Elevated Temperatures
Zinc Chloride [1] Acceptable
Acids, Bases & Salts

Most water-based solutions of acids, bases, or neutral salts have no different effect on Ryton® PPS compounds than water alone. The primary exceptions are strong oxidizing acids, such as nitric acid, hydrochloric acid, or peroxy acids (see Oxidizing Chemicals). Relatively non-oxidizing acids, such as sulfuric acid and phosphoric acid, have little effect on PPS except under very severe conditions, such as high concentration and temperature.

Strong bases, such as concentrated sodium hydroxide or potassium hydroxide solutions, do not degrade PPS. Acids and bases tend to enhance and accelerate hydrolytic attack of polymer-reinforcement interfaces (see Hot Water), but the ultimate reduction in performance is typically not much worse than what occurs in water alone. We generally do not recommend use of compounds containing mineral fillers in service with strong acids (pH < 2) because of the susceptibility of some mineral fillers to acid digestion.

 

Effects of 50% Aqueous Zinc Chloride on Ryton® PPS Compounds
Ryton® PPS Compound 
Exposure Conditions

Tensile 
Strength 
Retained

Weight 
Change

Transverse 
Swell

R-4-200BL
 200 hours, 185°F (85°C)

101%

+ 0.1 %

+ 0.1 %

BR111BL
 200 hours, 185°F (85°C)

97%

0.0 %

0.0 %

 

Effects of Strong Acids and Strong Bases on Ryton® R-4 PPS
Chemical 
Exposure Conditions

Tensile 
Strength 
Retained

Weight 
Change

Transverse 
Swell

37% Hydrochloric Acid
 24 hours, 200°F (93°C)

61%

+ 1.5 %

 

 3 months, 200°F (93°C)

35%

- 10.2 %

 

 12 months, 200°F (93°C)

27%

- 0.7 %

 

10% Nitric Acid
 24 hours, 200°F (93°C)

91%

0.0 %

 

 3 months, 200°F (93°C)

0%

-----

 

85% Phosphoric Acid
 24 hours, 200°F (93°C)

100%

0.0 %

 

 3 months, 200°F (93°C)

99%

- 0.3 %

 

 12 months, 200°F (93°C)

89%

- 7.2 %

 

30% Sulfuric Acid
 24 hours, 200°F (93°C)

94%

+ 1.3 %

 

 3 months, 200°F (93°C)

89%

+ 1.3 %

 

 12 months, 200°F (93°C)

61%

+ 3.1 %

 

50% Sulfuric Acid
 1 week, 200°F (93°C)

80%

 

+ 1.8 %

 16 weeks, 200°F (93°C)

69%

 

+ 0.8 %

 52 weeks, 200°F (93°C)

73%

 

+ 1.6 %

80% Sulfuric Acid
 1 week, 200°F (93°C)

85%

 

+ 1.5 %

 16 weeks, 200°F (93°C)

85%

 

+ 0.6 %

 52 weeks, 200°F (93°C)

46%

 

+ 2.1 %

30% Sodium Hydroxide
 24 hours, 200°F (93°C)

100%

+ 0.1 %

 

 3 months, 200°F (93°C)

89%

+ 10.5%

 

 12 months, 200°F (93°C)

63%

+ 13.0 %

 

Automotive Fluids

Extensive test data demonstrates that Ryton® PPS compounds, regardless of the filler and/or additives used, are virtually impervious to all common automotive fuels (including alcohol-containing flex fuels), lubricating oils, transmission fluids, brake fluids, and other hydraulic fluids. Although differences in fillers and additives can affect resistance to engine coolants, Ryton® PPS compounds are generally very resistant to glycol-based and silicone containing coolants, even at elevated temperatures.

Ryton® R-4-220NA is specially formulated for enhanced resistance to the detrimental effects of water at elevated temperatures (see Hot Water), and therefore tends to retain a greater degree of mechanical strength over long-term exposure to high temperature engine coolants, especially the more aggressive "OAT" and "hybrid" type “long-life” engine coolants.

Learn more about Ryton® PPS resistance to automotive fluids.

Hot Water

Hot water can have a negative impact on the mechanical properties of glass-fiber reinforced grades. Ryton® PPS polymer is not hydrolyzed by hot water and Ryton® R-4-220NA PPS, Ryton® R-4-220BL PPS and Ryton® R-7-220BL PPS have been specially formulated for enhanced resistance to hot water. For more information, refer to the Resistance of Ryton® PPS to Hot Chlorinated Water technical bulletin.

Effects of Hot Water on Ryton® PPS Compounds
Ryton® PPS Compound 
Exposure Conditions

Tensile 
Strength 
Retained

Weight 
Change

Transverse 
Swell

Unfilled PPS
3 months, 200°F (93°C)

100%

+ 1.9 %

 

6 months, 200°F (93°C)

94%

+ 1.8 %

 

12 months, 200°F (93°C)

91%

+ 2.0 %

 

1 week, 300°F (149°C)

95%

 

 

4 weeks, 300°F (149°C)

91%

 

 

10 days, 350°F (177°C)

97%

 

 

R-4
48 weeks, 171°F (77°C)

76%

+ 0.4 %

 

48 weeks, 185°F (85°C)

59%

+ 0.5 %

 

48 weeks, 199°F (93°C)

52%

+ 0.6 %

 

1 week, 284°F (140°C)

51%

+ 0.2 %

+ 0.2 %

4 weeks, 284°F (140°C)

44%

+ 0.3 %

+ 0.0 %

16 weeks, 284°F (140°C)

46%

+ 0.4 %

+ 0.4 %

R-4XT
1 week, 284°F (140°C)

77%

+ 0.2 %

+ 0.0 %

4 weeks, 284°F (140°C)

64%

+ 0.2 %

+ 0.2 %

16 weeks, 284°F (140°C)

52%

+ 0.3 %

+ 0.2 %

R-4-220NA
1 week, 284°F (140°C)

97%

+ 0.1 %

+ 0.1 %

4 weeks, 284°F (140°C)

86%

+ 0.2 %

+ 0.0 %

16 weeks, 284°F (140°C)

81%

+ 0.2 %

+ 0.2 %

BR111
1 week, 284°F (140°C)

74%

+ 0.2 %

+ 0.2 %

4 weeks, 284°F (140°C)

59%

+ 0.2 %

+ 0.2 %

16 weeks, 284°F (140°C)

52%

+ 0.3 %

+ 0.2 %

R-7-220BL
500 hours, 284°F (140°C)

80%

+ 0.9 %

 

1000 hours, 284°F (140°C)

75%

+ 0.9 %

 

2000 hours, 284°F (140°C)

73%

+ 0.9 %

 

Organic Chemicals

Non-oxidizing organic chemicals generally have little effect on Ryton® PPS compounds, but amines, aromatic compounds, and halogenated compounds may cause some swelling and softening over extended periods of time at elevated temperatures. Ryton® PPS is practically unaffected by many organic chemicals, even under conditions that will dissolve or destroy other plastics, however some classes of organic chemicals can compromise the PPS polymer matrix. Non-aromatic, non-halogenated alcohols, aldehydes, alkanes, alkenes, esters, ethers, and ketones are all generally suitable for service with Ryton® PPS compounds, even at elevated temperatures.

 

Effects of Organic Chemicals on Ryton® R-4 PPS Compounds
Chemical 
Exposure Conditions

Tensile 
Strength 
Retained

Weight 
Change

Transverse 
Swell

Aniline
24 hours, 200°F (93°C)

100%

+ 1.0 %

 

3 months, 200°F (93°C)

86%

+ 5.1 %

 

12 months, 200°F (93°C)

42%

+ 5.7 %

 

Benzaldehyde
24 hours, 200°F (93°C)

97%

+ 1.5 %

 

3 months, 200°F (93°C)

47%

+ 5.7 %

 

12 months, 200°F (93°C)

42%

+ 6.5 %

 

Benzonitrile
24 hours, 200°F (93°C)

100%

+ 0.7 %

 

3 months, 200°F (93°C)

79%

+ 4.1 %

 

12 months, 200°F (93°C)

39%

+ 5.5 %

 

n-Butyl Alcohol
24 hours, 200°F (93°C)

100%

0.0 %

 

3 months, 200°F (93°C)

92%

+ 0.1 %

 

12 months, 200°F (93°C)

80%

0.0 %

 

Butyl Ether
24 hours, 200°F (93°C)

100%

0.0 %

 

3 months, 200°F (93°C)

89%

+ 0.7 %

 

12 months, 200°F (93°C)

79%

+ 0.8 %

 

Butylamine
24 hours, 200°F (93°C)

96%

+ 0.8 %

 

3 months, 200°F (93°C)

46%

+ 3.5 %

 

Carbon Tetrachloride
24 hours, 200°F (93°C)

100%

+ 1.0 %

 

3 months, 200°F (93°C)

48%

+ 6.5 %

 

12 months, 200°F (93°C)

25%

+ 9.9 %

 

Chloroform
24 hours, 200°F (93°C)

81%

+ 4.0 %

 

3 months, 200°F (93°C)

77%

+ 9.0 %

 

12 months, 200°F (93°C)

43%

+ 3.9 %

 

Cresyl Diphenyl Phosphate
24 hours, 200°F (93°C)

100%

+ 0.1 %

 

3 months, 200°F (93°C)

100%

+ 2.2 %

 

12 months, 200°F (93°C)

95%

+ 0.5 %

 

Crude Oil (aromatic)
4 weeks, 200°F (93°C)

101%

 

 

16 weeks, 200°F (93°C)

98%

 

 

52 weeks, 200°F (93°C)

100%

 

 

Cyclohexanol
24 hours, 200°F (93°C)

100%

0.0 %

 

3 months, 200°F (93°C)

91%

+ 0.2 %

 

12 months, 200°F (93°C)

86%

+ 0.1 %

 

1,2-Dichloroethane
2 weeks, 200°F (93°C)

108%

+ 4.2 %

+ 2.5 %

8 weeks, 200°F (93°C)

96%

+ 4.5 %

+ 2.8 %

24 weeks, 200°F (93°C)

104%

+ 4.3 %

+ 2.3 %

Diesel Fuel
8 weeks, 200°F (93°C)

100%

 

 

28 weeks, 200°F (93°C)

94%

 

 

52 weeks, 200°F (93°C)

99%

 

 

25% Diethanolamine
1 week, 212°F (100°C)

100%

 

 

4 weeks, 212°F (100°C)

95%

 

 

p-Dioxane
24 hours, 200°F (93°C)

99%

+ 1.4 %

 

3 months, 200°F (93°C)

96%

+ 5.2 %

 

12 months, 200°F (93°C)

82%

 

 

Ethyl Acetate
2 weeks, 200°F (93°C)

114%

+ 0.8 %

+ 0.8 %

8 weeks, 200°F (93°C)

111%

+ 1.9 %

+ 1.3 %

24 weeks, 200°F (93°C)

114%

+ 2.0 %

+ 1.2 %

Ethyl Alcohol
2 weeks, 200°F (93°C)

100%

+ 0.1 %

- 0.8 %

8 weeks, 200°F (93°C)

102%

+ 0.6 %

+ 0.7 %

24 weeks, 200°F (93°C)

100%

+ 0.9 %

+ 0.8 %

Freon 113 / 10% Oil
4 weeks, 100°F (38°C)

101%

+ 0.1 %

 

12 weeks, 100°F (38°C)

98%

0.0 %

 

24 weeks, 100°F (38°C)

103%

0.0 %

 

Hydraulic Fluid, Aircraft
24 hours, 200°F (93°C)

100%

+ 0.03 %

 

1 weeks, 140°F 60°C)

95%

+ 0.02 %

 

3 months, 140°F (60°C)

99%

- 0.02 %

 

Methyl Ethyl Ketone
2 weeks, 200°F (93°C)

115%

+ 1.1 %

+ 1.0 %

8 weeks, 200°F (93°C)

112%

+ 1.9 %

+ 1.7 %

24 weeks, 200°F (93°C)

115%

+ 1.9 %

+ 1.6 %

N-Methylpyrrolidinone
24 hours, 200°F (93°C)

100%

+ 1.5 %

 

3 months, 200°F (93°C)

92%

+ 5.7 %

 

12 months, 200°F (93°C)

80%

+ 5.0 %

 

Nitrobenzene
24 hours, 200°F (93°C)

100%

+ 1.3 %

 

3 months, 200°F (93°C)

63%

+ 6.6 %

 

12 months, 200°F (93°C)

31%

+ 7.3 %

 

Phenol
24 hours, 200°F (93°C)

100%

+ 0.5 %

 

3 months, 200°F (93°C)

92%

+ 2.3 %

 

12 months, 200°F (93°C)

63%

+ 3.1 %

 

Refrigerant R-22
4 weeks, 165°F (74°C)

108%

 

 

8 weeks, 165°F (74°C)

107%

 

 

12 weeks, 165°F (74°C)

121%

 

 

Toluene
24 hours, 200°F (93°C)

100%

+ 1.1 %

 

3 months, 200°F (93°C)

70 %

+ 4.9 %

 

12 months, 200°F (93°C)

41%

+ 4.9 %

 

Oxidizing Chemicals

Avoid exposure of Ryton® PPS compounds or Ryton® PPS Alloy compounds to these chemicals except at low concentrations or for very brief periods.

Listed below are some of the strong oxidizing agents and oxidizing acids known or expected to attack and degrade polyphenylene sulfide. We generally do not recommend using Ryton® PPS in extensive service with these chemicals. However, service in the presence of many of these chemicals under relatively mild conditions may be acceptable. For example, Ryton® PPS can withstand common disinfectant solutions that contain low concentrations of some these chemicals (such as hydrogen peroxide, sodium hypochlorite, or chlorine). Tests and field service experience have also shown that Ryton® PPS can withstand the small quantities of nitric acid and other acids present in flue gases.

  Nitric Acid 
Chromic Acid 
Chlorosulfonic Acid 
Sodium Hypochlorite 
Hydrogen Peroxide 
Potassium Permanganate 
Potassium Bichromate 
Sodium Bichromate 
Ozone
Hydrochloric Acid 
Hydrobromic Acid 
Hydrofluoric Acid 
Chlorine 
Bromine 
Iodine 
Nitrogen Tetroxide 
Peroxyacetic Acid 
Peroxybenzoic Acid
 

 

Effects of Oxidizing Chemicals on Ryton® R-4 PPS
Chemical 
Exposure Conditions

Tensile 
Strength 
Retained

Weight 
Change

37% Hydrochloric Acid
24 hours, 200°F (93°C)

61%

+1.5%

3 months, 200°F (93°C)

35%

-10.2%

12 months, 200°F (93°C)

27%

-0.7%

10% Nitric Acid
24 hours, 200°F (93°C)

91%

0.0%

3 months, 200°F (93°C)

0%

----

Ozone, 1.35 ppm
4 weeks, 208°F (98°C)

93%

 

5.25% Sodium Hypochlorite
24 hours, 200°F (93°C)

94%

-1.2%

3 months, 200°F (93°C)

77%

+0.4%

12 months, 200°F (93°C)

61%

+0.3%

Chemical 
Exposure Conditions

Flexural 
Strength 
Retained

Weight 
Change

1.5% Bromine
1 month, 180°F (82°C)

75%

 

2 months, 180°F (82°C)

60%

-3.1%

3.3% Bromine
1 month, 73°F (23°C)

62%

 

3 months, 73°F (23°C)

36%

-0.8%

0.26% Chlorine
1 month, 180°F (82°C)

85%

 

3 months, 180°F (82°C)

78%

-1.5%

0.7% Chlorine
1 month, 73°F (23°C)

97%

 

3 months, 73°F (23°C)

99%

+1.4%

Radiation

Ryton® PPS can withstand both gamma and neutron radiation exposure.

Ryton® PPS compounds are used in many nuclear installation applications because they can withstand both gamma and neutron radiation. The data tabulated below shows that 40% glass fiber reinforced PPS (Ryton® R-4 PPS) and glass and mineral filled PPS (Ryton® R-10 PPS) compounds exhibited no significant deterioration of mechanical properties after relatively high exposures to gamma and neutron radiation. Other 40% glass fiber reinforced PPS or glass and mineral filled PPS compounds would be expected to show similar resistance to degradation by radiation exposure.

 

Effects of Radiation Exposure on Ryton® PPS Compounds

Gamma Radiation
Ryton® PPS Compound 
Exposure Conditions

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
5 x 108 rads at 30°C (86°F)

-----

103%

95%

1 x 109 rads at 30°C (86°F)

-----

105%

97%

5 x 109 rads at 30°C (86°F)

-----

99%

96%

3 x 108 rads at 50-55°C (122-131°F)

100%

93%

102%

R-10 5002C
3 x 108 rads at 50-55°C (122-131°F)

97%

99%

103%

R-10 7006A
3 x 108 rads at 50-55°C (122-131°F)

102%

99%

101%

Neutron Radiation
Ryton® PPS Compound 
Exposure Conditions

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
5 x 108 rads at 30°C (86°F)

-----

101%

100%

1 x 109 rads at 30°C (86°F)

-----

101%

99%

4 x 108 rads at 50-55°C (122-131°F)

90%

86%

102%

R-10 5002C
4 x 108 rads at 50-55°C (122-131°F)

84%

94%

100%

R-10 7006A
4 x 108 rads at 50-55°C (122-131°F)

87%

95%

97%

Thermal Aging

Ryton® PPS compounds and Ryton® PPS Alloy compounds are highly resistant to thermal oxidative degradation at elevated temperatures.

Ryton® PPS compounds exhibit exceptional resistance to thermal oxidative degradation during long-term exposure to elevated temperatures. Ryton® PPS Alloy compounds also exhibit excellent performance in this regard. The data tabulated below shows the excellent property retention of Ryton® PPS compounds and Ryton® PPS Alloy compounds after thermal aging in air at various temperatures. In these studies, test specimens were aged in forced draft ovens, and samples were removed periodically and tested for tensile strength, modulus (tensile or flexural) and impact strength (unnotched izod or unnotched charpy impact). Under its Component Recognition Program, Underwriters Laboratories (UL) also maintains documentation of studies of the long-term thermal endurance of Ryton® PPS compounds, and UL has established relative thermal indices (RTIs) of 200°C to 240°C (392°F to 464°F) for almost all Ryton® PPS compounds (see UL Yellow Card Listings).

Effects of Thermal Aging on Ryton® PPS Compounds and Ryton® PPS Alloy Compounds

Thermal Aging at 150°C
Ryton® PPS Compound 
Hours at 302°F (150°C)
Tensile 
Strength 
Retained
Flexural 
Modulus 
Retained
Impact 
Strength 
Retained
XE5030BL
500 hours 79% 96% 97%
3000 hours 100% 101% 93%
5000 hours 101% 101% 92%
XE4050BL
500 hours 86% 100% 104%
3000 hours 105% 103% 98%
5000 hours 99% 102% 85%
Thermal Aging at 165°C
Ryton® PPS Compound 
Hours at 329°F (165°C)
Tensile 
Strength 
Retained
Flexural 
Modulus 
Retained
Impact 
Strength 
Retained
R-4-200BL
500 hours 100% 99% 94%
1000 hours 96% 98% 77%
2000 hours 97% 100% 82%
BR111BL
500 hours 105% 99% 91%
1000 hours 102% 101% 99%
2000 hours 99% 95% 86%
XK2340
500 hours 84% 104% 52%
1000 hours 82% 108% 49%
2000 hours 76% 106% 43%
Thermal Aging at 200°C
Ryton® PPS Compound 
Hours at 392°F (200°C)
Tensile 
Strength 
Retained
Flexural 
Modulus 
Retained
Impact 
Strength 
Retained
R-4-200BL
500 hours 85% 104% 67%
1000 hours 81% 107% 66%
2000 hours 74% 104% 56%
R-4-200NA
2000 hours 76% 105% 54%
XK2340
2000 hours 46% 110% 21%
XE5030BL
2000 hours 77% 112% 39%
XE4050BL
2000 hours 81% 119% 37%
Thermal Aging at 220°C
Ryton® PPS Compound 
Hours at 428°F (220°C)
Tensile 
Strength 
Retained
Tensile 
Modulus 
Retained
Impact 
Strength 
Retained
R-4-200BL
500 hours 80% 107% -----
1000 hours 79% 107% -----
3000 hours 72% 94% -----
R-4-220BL
500 hours 82% 109% -----
1000 hours 77% 98% -----
3000 hours 76% 97% -----
XE5030BL
500 hours 82% 103% 45%
1000 hours 82% 106% 43%
2000 hours 80% 108% 40%
3000 hours 77% 109% 37%
XE4050BL
500 hours 88% 105% 46%
1000 hours 89% 108% 46%
2000 hours 89% 113% 41%
3000 hours 87% 114% 46%
Thermal Aging at 240°C
Ryton® PPS Compound 
Hours at 464°F (240°C)
Tensile 
Strength 
Retained
Flexural 
Modulus 
Retained
Impact 
Strength 
Retained
R-4-200BL
504 hours 75% 113% 58%
1002 hours 75% 114% 51%
2112 hours 69% 122% 51%
2994 hours 65% 125% 41%
BR111
504 hours 89% 103% 57%
1002 hours 85% 100% 52%
2112 hours 83% 110% 53%
2994 hours 78% 114% 48%
UV Light and Weathering

Although exposure to UV light and weathering may cause some surface degradation and erosion, the mechanical properties of Ryton® PPS will be relatively unaffected.

Although exposure of Ryton® PPS to UV light may cause some surface degradation and erosion, the properties of the bulk material generally are relatively unaffected by such exposure. In the study summarized below, Ryton® R-4 PPS (which has no UV inhibitor) and Ryton® R-4 PPS with 2% carbon black as UV inhibitor were subjected to aging in an Atlas Weatherometer and suffered minimal property loss. Many Ryton® PPS compounds have been rated suitable for outdoor use with respect to UV light exposure, water exposure and water immersion in accordance with UL746C (see UL Yellow Card Listings). However, since some discoloration and attrition of surface material may occur over time with UV exposure and weathering, part surface finish should not be expected to remain unchanged over the long term.

Effects of Weatherometer Aging on Ryton® PPS Compounds
Ryton® PPS Compound 
Hours of Exposure

Tensile 
Strength 
kpsi

Elongation

Surface 
Erosion 
mm

R-4
0

16.7

1.1 %

 

2000

15.3

1.2 %

 

6000

15.5

1.4 %

 

8000

14.4

1.2 %

 

10000

10.6

0.6 %

0.33

R-4 with 2% Carbon Black
0

17.4

1.2 %

 

2000

17.3

1.1 %

 

6000

17.3

0.9 %

 

8000

16.8

1.0 %

0.05

These design guidelines are intended to help designers maximize the versatility of Ryton® PPS engineering thermoplastics in their products. Our suggestions regarding these common part and mold design issues are based on the results of direct experimentation and our Technical Service staff's experiences in helping customers.

For more complete and detailed information, contact our technical specialists.

Walls

Wall Thickness and Radius

Since material cost and cycle time are directly related to wall thickness, optimum part design balances minimum wall thickness versus sufficient strength. However, wall sections must be thick enough for the material to fill the mold under typical processing conditions. The maximum material flow that may be expected at various wall thicknesses under typical processing conditions is tabulated below. Many Ryton®PPS parts have walls as thin as 0.015 to 0.020 inch (0.38 to 0.51 mm), however no more than 2 inches (5 cm) of flow can be expected when filling such thin sections. To avoid the formation of sinks, internal voids, and internal stress cracking in Ryton® PPS parts, we generally advise using a maximum wall thickness of not more than 0.375 inch (9.52 mm).

Ryton PPS Maximum Flow Length in 135°C Mold

 

Uniform wall thickness throughout the entire part is the single most important design feature that can be incorporated into a part, so thick part sections should be cored to achieve a uniform wall thickness. Uniform wall thickness provides for a more uniform pressure drop, even temperature distribution, constant shear stress, and balanced cooling. As a result, molded parts will exhibit more uniform shrinkage, which decreases warpage and residual stress. When uniform wall thickness is not possible, the thinnest wall thickness should be no less than 40% of the thickest wall and intersections should have a radius of at least 60% of the thinner wall thickness. Parts should be gated to fill from thicker sections to thinner sections.

Being a semi-crystalline thermoplastic, Ryton® PPS is notch sensitive, so sharp corners should be avoided in part designs. Abrupt changes in part geometry, like sharp inside corners, cause amplification of stress in the area of the abrupt change, as well as additional problems such as impeding flow, development of molded-in stress, and formation of voids. To avoid these problems, corners in Ryton® PPS parts should have a radius of 60% of the wall thickness.

Ribs and bosses should have a minimum wall thickness of 60% of the thickness of the intersecting wall and the height should be no more than three times the thickness of the intersecting wall. At the base, there should be a radius of 60% of the thickness of the intersecting wall, and 0.5° to 2° of draft should be used. The outer diameter of a hollow boss should be 2.5 to 3.0 times the inner diameter, and the depth of the core should extend to 60% of the thickness of the intersecting wall. The cross section of a typical boss design is shown below.

Ryton PPS Typical boss design
Gates

Gate Location and Size

A variety of different gating methods are suitable for molding Ryton® PPS compounds. Common sprue, pin, and tab gates as well as fan, flash, spoke, diaphragm, and submarine gates have all been used for molding Ryton® PPS compounds and Ryton® PPS Alloy compounds.

Gate Location 
The placement of the gate requires careful consideration since it has substantial ramifications on the strength and dimensional stability of the part. The designer should strive to maintain uniform flow throughout the part filling process and minimize internal stresses and weld lines. Since Ryton® PPS compounds are reinforced with glass fiber, they shrink anisotropically, about half as much in the flow direction as perpendicular to the direction of flow. This differential shrinkage can incur internal stresses that may cause part distortion or contribute to part failure.

Differences in part cross section and abrupt changes in flow patterns during mold filling can generate additional internal stresses and/or voids. Gate location should promote steady material flow starting in thicker wall sections and proceeding to thinner wall sections, must avoid back filling, and should ensure that the last places to fill can be vented, preferably at the mold parting line. Filling patterns should be planned to promote glass fiber orientation along axes that experience more stress in service. If the part cannot be molded without weld lines, the weld lines should be placed in the thickest section of the part or in areas where there is minimal stress.

Gate Size 
Sufficient gate size is essential to ensure easy filling and adequate packing of the part, but it is also important that the gate not be so large that the time required for it to freeze off adversely affects cycle time. It is generally best to plan for the gate to be of minimal size, and then enlarge it later, if necessary. Although the wide variety of possible part geometries makes it impractical to establish criteria for any circumstance, we can provide the following general guidelines for gate sizing.

We recommend an absolute minimum gate diameter or thickness of 0.9 to 1.0 mm (0.035 to 0.040 inch) for any part, even very small parts. This is to ensure adequate pack and hold pressure for the part and to prevent excessive shear that may cause overheating of the material and/or degradation of glass fiber length. A good guideline for larger parts is for the gate diameter or thickness to be about 60% to 75% of the maximum wall thickness of the part, but the graph shown below depicts the need for increasing the gate diameter or thickness as overall part volume increases. The “Minimum Gate Diameter” for round gates in the chart shown below may also be considered the minimum gate thickness for typical rectangular gates having a width of two times the gate thickness.

 

Ryton PPS Minimum round gate diameter
Glass Fibers

Glass Fiber Orientation

The orientation of the glass fiber reinforcement affects strength, thermal expansion, and mold shrinkage. There tends to be more alignment of glass fibers parallel to the direction of flow during mold filling, and the mechanical strength of Ryton® PPS compounds and Ryton® PPS Alloy compounds can be up to 50% greater in the flow direction as compared to the transverse direction. Part and mold design should exploit the enhanced strength from glass fiber orientation along axes that will experience more stress in service, while minimizing potential stress transverse to glass fiber alignment. In some cases, it may be necessary to increase wall thickness to compensate for lower strength transverse to glass fiber alignment. 

Bear in mind that the mechanical strength values reported on technical data sheets are measured in the flow direction. It is also important to note that thermal expansion will typically be at least twice as much along axes transverse to glass fiber alignment as compared to along axes parallel to glass fiber alignment. See Mold Shrinkage and Typical Molding Tolerances for information on how glass fiber alignment affects mold shrinkage.

Weld Lines

Weld Line Strength

Weld lines are formed during the molding process when the melt flow front divides and then flows back together. Typically, the weld line interface is resin rich because the glass fibers tend not to cross the interface. The lack of glass fiber reinforcement across the interface results in lower mechanical strength along the weld line. Gate location and fill patterns should be planned so that weld lines will be eliminated or located in areas of minimal stress whenever possible. 

If weld lines must bear stress, the part design should compensate for the typical weld line strengths indicated below. Weld line strength is highly dependent on molding conditions, so the part and tool design should allow for rapid injection, a hot flow front, and thorough packing. Gas entrapment is very detrimental to weld line strength, so molds must be designed to avoid back filling and should be adequately vented in areas where weld lines form.

Nominal Weld Line Tensile Strength of Ryton® PPS Compounds
BR111 and BR111BL 45 MPa 6.5 kpsi
BR42B 55 MPa 8.0 kpsi
R-4 and R-4-02 40 MPa 6.0 kpsi
R-4-200NA and R-4-200BL 60 MPa 8.5 kpsi
R-4-220NA and R-4-220BL 55 MPa 8.0 kpsi
R-4-230NA and R-4-230BL 40 MPa 6.0 kpsi
R-4-240NA and R-4-240BL 80 MPa 11.5 kpsi
R-4XT and R-4-02XT 55 MPa 8.0 kpsi
R-7-120NA and R-7-120BL 45 MPa 6.5 kpsi
R-7-121NA and R-7-121BL 40 MPa 6.0 kpsi
R-7-220BL 45 MPa 6.5 kpsi
XE4050BL 45 MPa 6.5 kpsi
XE5030BL 50 MPa 7.5 kpsi
XE5515BL 65 MPa 9.5 kpsi
XK2340 60 MPa 8.5 kpsi

Test Method: ISO 527, double end gated specimens

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)

*The nominal properties reported herein are typical of the products but do not reflect normal testing variances and therefore should not be used for specification purposes.

Mold Construction

Mold Construction

Tool Steels, Coatings, and Surface Treatments 
Because of the abrasive nature of the glass and mineral fillers used in Ryton® PPS compounds and Ryton® PPS Alloy compounds, hard tool steels are required. For long run production molds, we advise using A-2, D-2, or D-7 tool steels hardened to Rockwell C-60 or higher. For low volume runs, P20, S7, and H13 are acceptable softer steels. Slow deposition dense chrome and electroless nickel coatings provide good mold release characteristics and fairly long tool life. Surface treatments including Borofuse®, LSR-1®, and Nitride® may also be used to reduce tool wear. Steels with a surface finish of 0.0001 mm (4 microinch) or better typically experience extended service life. Because especially high rates of wear are typically encountered at gates, removable (replaceable) gate blocks are often used. For more information, refer to the Abrasion Resistant Steels and Surface Treatments for Extending Tool Life technical bulletin.

Mold Temperature Control 
Molds for processing Ryton® PPS compounds and Ryton® PPS Alloy compounds must be designed to provide a mold surface temperature of at least 135°C (275°F). Various methods such as hot oil, electric cartridges, or high pressure water may be used to accomplish this. We generally advise using hot oil because it allows for addition or removal of heat for better temperature control under relatively low pressure.

Sprues and Runners 
Molds for processing Ryton® PPS compounds and Ryton® PPS Alloy compounds generally use standard sprue designs with nominal 2° of draft and reverse taper or Z-cut sprue puller systems. The shaft should be as short and highly polished as possible to ease part removal from the stationary half of the mold. Runners of many types can be used, however, full round and trapezoidal runners are preferred and runner length should be kept to a minimum. 

Multi-cavity molds should have balanced runner systems designed so that the mold cavities fill uniformly and in a balanced fashion. On multi-cavity molds with primary and secondary runners, the primary runner should carry on beyond the intersection with the secondary runner in order to provide a cold slug well for the runner flow front. As with engineering plastics in general, it is good practice not to use family mold layouts because difficulty in controlling filling patterns may produce parts with varying physical and mechanical properties.

Venting 
Proper venting is essential for processing Ryton® PPS compounds and Ryton® PPS Alloy compounds because inadequate venting results in hard to fill parts as well as burning of the part and accelerated mold wear in the areas where gas is trapped. Venting can be accomplished with 0.008 to 0.013 mm (0.0003 to 0.0005 inch) deep by 6.35 mm (0.250 inch) wide channels cut on the parting line. Venting can also be accomplished by flattening ejector pins 0.018 mm (0.0007 inch) on one to four sides. Polishing vents to an A-1 finish in the direction of flow will help prevent buildup of residues during long part runs. 

Stationary vent pins are typically not used because they can become clogged over long part runs. Vacuum venting has been used successfully in areas where a blind pocket exists. The vacuum is turned on after the mold closes and prior to the start of the injection cycle. Runners should be vented with 0.025 mm (0.001 inch) deep channels cut on the parting line.

Mold Shrinkage

Mold Shrinkage and Typical Molding Tolerances

Mold shrinkage of Ryton® PPS compounds and Ryton® PPS Alloy compounds is affected by many factors including the type of compound, part weight and thickness, glass fiber orientation, and coring.

Glass fiber reinforced Ryton® PPS compounds and Ryton® PPS Alloy compounds will shrink anisotropically due to glass fiber alignment. For most parts having a wall thickness of 0.20 inch (5.1 mm) or less, mold shrinkage in the flow direction will typically be about 0.003 in/in for 40% glass filled PPS compounds and about 0.002 in/in for 65% glass and mineral filled PPS compounds. But, mold shrinkage will typically be about twice as much transverse to the direction of flow. Consult individual technical data sheets for mold shrinkage measurements determined on 4 inch by 4 inch by 0.125 inch (102 mm X 102 mm X 3.2 mm) plaques.

The shrinkage factors provided in our technical data sheets should provide a good indication of the shrinkage behavior for most parts having a wall thickness of 0.20 inch (5.1 mm) or less. But larger, thicker walled parts will tend to shrink more, and differential shrinkage may vary depending on part geometry and coring. For any given part, less mold shrinkage is observed with increasing part weight (less shrinkage with better part packing). Thicker wall sections generally exhibit higher shrinkage (up to an additional 0.001 in/in) than thinner ones since they hold heat longer. Lengthy thin wall sections tend to generate more glass fiber alignment resulting in greater differential shrinkage. Parts restrained during molding by coring will exhibit lower shrinkage than unrestrained parts. Mold shrinkage also increases somewhat with increasing mold temperature due to increased crystallization.

Cold molded parts will exhibit slightly less shrinkage than hot molded parts due to the lower degree of crystallinity. When heated above 190°F (88°C) after molding, cold molded parts will undergo thermal induced crystallization and additional shrinkage will occur. Conversely, hot molded parts that already have a high degree of crystallinity will undergo very little additional shrinkage when exposed to temperatures above 400°F (204°C).

Due to the low mold shrinkage of Ryton® PPS compounds, part-to-part dimensional molding tolerances are very reproducible, once shrinkage behavior under typical processing conditions has been established. Molding tolerances as tight as 0.0001 in/in may be achieved in optimally gated small parts, but molding tolerances are typically about 0.001 in/in, and may be as high as 0.002 in/in in some large parts. New molds should be cut “steel safe” to allow for later adjustments for differential shrinkage.

Detailed engineering properties are available for commonly used Ryton® PPS compounds and Ryton® PPS Alloy compounds. These feature industry standard test methods and typical end-use operating conditions. If you are unable to locate data for the test method or product required, please contact our technical experts for further assistance.

Abrasion & Friction

Thrust Washer Test

The dynamic coefficient of friction and wear rate of Ryton® PPS compounds has been determined using a Thrust Washer machine according to ASTM D 3702. In this test, a specimen having a ring-shaped test surface is rotated against a stationary steel washer at a specified speed and under a specified weight for a specified period of time, and the reduction in thickness of the test specimen is then measured. The dynamic coefficient of friction may also be determined from the torque on the rotating specimen during the test. These tests were performed dry, at 36 rpm (velocity 10 ft/min, 3.05 m/min), under a 50 pound (22.7 kg) test load (250 psi, 1.72 MPa).

 

Coefficient of Friction and Wear Resistance of Ryton® PPS Compounds

Ryton® PPS Compound Countersurface Test Duration Material COF Material Wear Rate Countersurface Wear Rate
    hours   g/hr in/hr mm/hr g/hr
R-4 52100 Steel (Rc 60) 10 0.50 1.2 x 10-2 2.2 x 10-3 5.5 x 10-2 7.0 x 10-3
BR42B 52100 Steel (Rc 60) 100 0.32 3.8 x 10-4 6.2 x 10-5 1.6 x 10-3 3.0 x 10-4
R-4-200NA 1018 Steel (Rc 20) 20 0.40 6.2 x 10-3 1.0 x 10-3 2.6 x 10-2 3.6 x 10-3
R-4-220BL 1018 Steel (Rc 20) 20 0.43 7.4 x 10-3 1.3 x 10-3 3.3 x 10-2 3.9 x 10-3
BR42B 1018 Steel (Rc 20) 160 0.39 3.7 x 10-4 6.0 x 10-5 1.5 x 10-3 2.1 x 10-4

 

Taber Abrasion Test

The abrasion resistance of Ryton® PPS compounds has been determined using the Taber abrasion apparatus according to ASTM D 1044. In this test, a flat plaque test specimen is mounted on a turntable in contact with a weighted abrasive wheel, and after a selected number of revolutions of the wheel at constant speed, the weight loss of the specimen is determined.

Taber Abrasion Testing of Ryton® PPS Compounds
      Weight Loss (g) After Indicated Number of Revolutions
Ryton® PPS Compound Wheel Load 500 1000 1500 2000 10000
R-4 CS-10 1 kg ----- 0.070 ----- ----- -----
R-4-02 CS-10 1 kg ----- 0.040 ----- ----- -----
R-4-220NA CS-10 1 kg ----- 0.054 ----- ----- -----
R-7-120NA CS-10 1 kg ----- 0.064 ----- ----- -----
BR111 CS-10 1 kg ----- 0.051 ----- ----- -----
BR42B CS-10 1 kg ----- 0.015 ----- ----- -----
XK2340 CS-10 1 kg ----- 0.031 ----- ----- -----
R-4-200BL CS-17 1 kg ----- 0.057 ----- ----- 0.625
R-4-220BL CS-17 1 kg 0.040 0.056 0.066 0.077 -----
R-7-120BL CS-17 1 kg 0.047 0.079 0.103 0.130 -----
XE5030BL CS-17 1 kg ----- 0.055 ----- ----- 0.632
XE4050BL CS-17 1 kg ----- 0.107 ----- ----- 0.976

 

Coefficient of Friction

The coefficient of friction of 40% glass fiber reinforced PPS (Ryton® R-4 PPS) was determined using the Alpha Molykote LFW-1 friction and wear test machine. The flat block test specimens were run against a steel ring at selected speeds under a 15 pound (6.8 kg) load. There appeared to be little difference in the static and dynamic coefficient of friction.

Coefficient of Friction of 40% Glass Fiber Reinforced PPS
  Speed COF
0 rpm (static) 0 ft/min (0 m/min) 0.50
100 rpm (dynamic) 29 ft/min (8.8 m/min) 0.55
190 rpm (dynamic) 55 ft/min (16.8 m/min) 0.53

 

Creep

Creep Charts for Ryton® PPS Compounds

XK2340 Tensile Creep

Ryton-XK2340-creep-data

 

E5030BL Tensile Creep

Ryton-XE5030BL-creep-data

 

​XE4050BL Tensile Creep

Ryton-XE4050BL-creep-data

 

R-7-220BL Tensile Creep

Ryton-R7220BL-creep-data

 

R-4 Tensile Creep

Ryton-R4-creep-data

 

R-7-120BL Tensile Creep

Ryton-R7120BL-creep-data

 

R-4-02XT Tensile Creep

Ryton-R402XT-creep-data

 

R-4-200BL Tensile Creep

Ryton-R4200BL-creep-data

 

BR42B Tensile Creep

Ryton-BR42B-creep-data

 

BR111 Tensile Creep

Ryton-BR111-creep-data

 

Fatigue

S / N Curves for Ryton® PPS Compounds

BR111 Flexural Fatigue

Ryton-BR111-flexural-fatigue

 

BR111 Tensile Fatigue

Ryton-BR111-tensile-fatigue

 

BR42B Flexural Fatigue

Ryton-BR42B-flexural-fatigue

 

R-4 Tensile Fatigue

Ryton-R4-tensile-fatigue

 

R-4-02XT Tensile Fatigue

Ryton-R402XT-tensile-fatigue

 

R-4-200BL Tensile Fatigue

Ryton-R4200BL-tensile-fatigue

 

R-7-120BL Tensile Fatigue

Ryton-R7120BL-tensile-fatigue

 

Mechanical Properties

Mechanical Properties of Ryton® PPS Compounds at Various Temperatures

Tensile Strength

Nominal Tensile Strength of Ryton® PPS Compounds from -40°C to 200°C

Ryton® PPS Compound   -40°C 

-40°F
23°C 

73°F
50°C 

122°F
75°C 

167°F
100°C 

212°F
150°C 

302°F
200°C 

392°F
R-4-200BL MPa 195 180 160 140 105 65 45
  kpsi 28 26 23 20 15 9,5 6,5
R-4-220BL MPa 190 175 160 145 110 65 50
  kpsi 28 25 23 21 16 9,5 7,5
R-4-230BL  MPa 135 130 130 130 110 70 45
  kpsi 20 19 19 19 16 10 6,5
R-4-240BL MPa 195 165 150 130 100 60 45
  kpsi 28 24 22 19 15 8,5 6,5
R-7-120BL MPa 175 135 120 120 100 70 50
  kpsi 25 20 17 17 15 8,5 6,5
R-7-220BL MPa 185 160 150 140 115 80 60
  kpsi 27 23 22 20 17 12 8,5
BR111BL MPa 220 190 165 155 120 75 55
  kpsi 32 28 24 23 17 11 8.0
BR42B MPa 220 190 165 155 120 75 55
  kpsi 32 28 24 23 17 11 8.0
XE5030BL MPa 160 130 110 95 75 45 35
  kpsi 23 19 16 14 11 7.5 6.0
XK2340 MPa 205 195 165 140 120 90 75
  kpsi 30 28 24 20 17 13 11

Test Method: ISO 527 

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)

THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

 

Tensile Modulus

Nominal Tensile Modulus of Ryton® PPS Compounds from -40°C to 200°C

Ryton® PPS Compound   -40°C 

-40°F
23°C 

73°F
50°C 

122°F
75°C 

167°F
100°C 

212°F
150°C 

302°F
200°C 

392°F
R-4-200BL GPa 16 14 14 14 12 7.0 5.0
  Mpsi 2.4 2.1 2.1 2.1 1.8 1.0 0.7
R-4-220BL GPa 15 14 14 14 11 6.0 5.5
  Mpsi 2.2 2.1 2.1 2.1 1.6 0.9 0.8
R-4-230BL GPa 16 14 15 14 11 7.0 5.5
  Mpsi 2.4 2.1 2.2 2.1 1.6 1.0 0.8
R-4-240BL GPa 13 13 13 13 10 5.0 4.0
  Mpsi 1.9 1.9 1.9 1.9 1.5 0.7 0.6
R-7-120BL GPa 21 19 18 17 16 7.0 6.5
  Mpsi 3.1 2.8 2.6 2.5 2.4 1.0 1.0
R-7-220BL GPa 17 17 16 16 12 8.0 7.0
  Mpsi 2.5 2.5 2.4 2.4 1.8 1.2 1.0
BR111BL GPa 20 21 20 20 15 8.5 7.5
  Mpsi 2.9 3.1 2.9 2.9 2.2 1.2 1.1
BR42B GPa 17 16 16 15 12 7.5 6.0
  Mpsi 2.5 2.4 2.4 2.2 1.8 1.1 0.9
XE5030BL GPa 10 10 10 10 7.0 4.0 3.5
  Mpsi 1.5 1.5 1.5 1.5 1.0 0.6 0.5
XE4050BL GPa 12 11 11 10 7.5 4.0 3.5
  Mpsi 1.8 1.6 1.6 1.5 1.1 0.6 0.5
XK2340 GPa 18 15 12 11 9.5 7.5 7.0
  Mpsi 2.6 2.2 1.8 1.6 1.4 1.1 1.0

Test Method: ISO 527

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)

THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Stress/Strain

Stress / Strain Curves for Ryton® PPS Compounds

R-4-200BL Tensile Stress/Strain Curves

Ryton-R4200BL-tensile-stress-strain

 

R-7-120BL Tensile Stress/Strain Curves

Ryton-R7120BL-tensile-stress-strain

 

BR42B Tensile Stress/Strain Curves

Ryton-BR42B-tensile-stress-strain

 

R-4-220BL Tensile Stress/Strain Curves

Ryton-R4220BL-tensile-stress-strain

 

R-7-220BL Tensile Stress/Strain Curves

Ryton-R7220BL-tensile-stress-strain

 

BR111BL Tensile Stress/Strain Curves

Ryton-BR111BL-tensile-stress-strain

 

XE4050BL Tensile Stress/Strain Curves

Ryton-XE5030BL-tensile-stress-strain

 

XE5030BL Tensile Stress/Strain Curves

Ryton-XE5030BL-tensile-stress-strain

 

​XK2340 Tensile Stress/Strain Curves

Ryton-XK2340-tensile-stress-strain

 

​R-4-230BL Tensile Stress/Strain Curves

Ryton-R4230BL-tensile-stress-strain

 

R-4-240BL Tensile Stress/Strain Curves

Ryton-R4240BL-tensile-stress-strain

 

Weld Lines

Weld Line Strength

Weld lines are formed during the molding process when the melt flow front divides and then flows back together. Typically, the weld line interface is resin rich because the glass fibers tend not to cross the interface. The lack of glass fiber reinforcement across the interface results in lower mechanical strength along the weld line. Gate location and fill patterns should be planned so that weld lines will be eliminated or located in areas of minimal stress whenever possible. 

If weld lines must bear stress, the part design should compensate for the typical weld line strengths indicated below. Weld line strength is highly dependent on molding conditions, so the part and tool design should allow for rapid injection, a hot flow front, and thorough packing. Gas entrapment is very detrimental to weld line strength, so molds must be designed to avoid back filling and should be adequately vented in areas where weld lines form.

Nominal Weld Line Tensile Strength of Ryton® PPS Compounds
BR111 and BR111BL 45 MPa 6.5 kpsi
BR42B 55 MPa 8.0 kpsi
R-4 and R-4-02 40 MPa 6.0 kpsi
R-4-200NA and R-4-200BL 60 MPa 8.5 kpsi
R-4-220NA and R-4-220BL 55 MPa 8.0 kpsi
R-4-230NA and R-4-230BL 40 MPa 6.0 kpsi
R-4-240NA and R-4-240BL 80 MPa 11.5 kpsi
R-4XT and R-4-02XT 55 MPa 8.0 kpsi
R-7-120NA and R-7-120BL 45 MPa 6.5 kpsi
R-7-121NA and R-7-121BL 40 MPa 6.0 kpsi
R-7-220BL 45 MPa 6.5 kpsi
XE4050BL 45 MPa 6.5 kpsi
XE5030BL 50 MPa 7.5 kpsi
XE5515BL 65 MPa 9.5 kpsi
XK2340 60 MPa 8.5 kpsi

Test Method: ISO 527, double end gated specimens

Test Specimen Molding Conditions: Melt Temperature 315-343°C (600-650°F); Mold Temperature 135°C (275°F)

THE NOMINAL PROPERTIES REPORTED HEREIN ARE TYPICAL OF THE PRODUCTS BUT DO NOT REFLECT NORMAL TESTING VARIANCES AND THEREFORE SHOULD NOT BE USED FOR SPECIFICATION PURPOSES.

Safe Handling

Polyphenylene sulfide (PPS) resin is essentially nontoxic by ingestion. In acute skin and eye irritancy evaluations, PPS produces only the minimal degree of irritation which can be perceived. It appears that PPS dust is inert and presents no hazard to health from long-term inhalation exposure. It should be treated as a typical "nuisance-type" dust.

Off-gases produced during melt processing of PPS can be irritants to mucous membranes, therefore adequate ventilation of the processing area is recommended when melt processing PPS compounds.

For information on Ryton® PPS compliance with environmental and restricted substance regulations, refer to the Ryton® PPS Regulatory Information. For Underwriters Laboratory (UL) Certifications, visit our UL Database.

For further information and to receive Safety Data Sheets (SDS), contact our technical specialists.

Fire Safety

Fire Safety Standards

AIRBUS ATS 1000-001

  • Ryton® R-4 PPS

NF F 16-101 (fire proof) 
NF T 51-071 
NF C 20-455

  • Ryton® R-4-200NA PPS Class I3
  • Ryton® R-4 PPS Class I2

NF F 16-101/102 (smoke index)

  • Ryton® R-4-200NA PPS Class F3
  • Ryton® R-4 PPS Class F4

NF X 10-702/70-100 (fumes and toxicity)

  • Ryton® R-4 PPS Class F3
Flammability & Smoke Generation

Burning Characteristics of Polyphenylene Sulfide

Although it can be ignited, polyphenylene sulfide (PPS) will neither sustain prolonged combustion nor support significant flame propagation when tested by any of the standard tests commonly used for plastics. Unfortunately, no lab test can be expected to encompass all of the variables of an uncontrolled fire, such as a building or equipment fire, even if one fire scenario could be selected as "typical." 

In various tests using heat, flame and electrical ignition sources, PPS will burn if the ignition source is hot enough, and will continue to burn until the ignition source is removed. As PPS burns, it chars and may bubble somewhat, which can reduce heat transfer to the remaining material. In general, PPS compounds do not drip as they burn, but thin sections of the higher flow compounds can soften or melt enough to deform during combustion and may drip if the ignition source is hot enough. The "flame-retardance" of Ryton® PPS compounds is inherent to the stable chemistry of the PPS polymer itself, and does not rely on flame-retardant additives which can compromise the electrical and mechanical performance of compounds.

Normal combustion of PPS will generate carbon dioxide, water vapor, sulfur oxides and may produce carbon monoxide, carbonyl sulfide and various hydrocarbons and hydrocarbon oxidation products (such as ketones, aldehydes and organic acids) depending on temperature and air availability. Incomplete combustion can also produce formaldehyde. Trace amounts of hydrogen chloride and nitrogen oxide gases may also be generated.

Although lab tests cannot predict burning behavior in a real fire, they are presented here for comparison with other materials. Test results for representative 40% glass fiber reinforced PPS (Ryton® R-4 PPS) and 65% glass/mineral filled PPS (Ryton® R-10 7006A PPS) compounds are provided. See our Product Data Sheets and information on Fire Safety Standards and UL Yellow Card Listings for performance of Ryton® PPS compounds in additional tests.

 

Ignition Temperature - ASTM E 659

This test was performed by Underwriters Laboratories. It consists of placing some plastic chips or shavings into a glass flask that is submerged in a bath of molten alloy. The ignition chamber is purged and air added to assist ignition of the sample. If the test sample does not flame or glow, the flask is purged of residual gases, vapors and tested material. The temperature is raised and new sample added to the flask. This procedure is repeated until a minimum temperature is reached that induces the test material to glow or burn. That minimum combustion temperature is reported as the ignition temperature.

40% Glass Fiber Reinforced PPS: 540°C (1004°F)

 

Flash Point - ASTM D 1929

The flash point was determined by conventional procedures as described in ASTM D 1929 or ISO 871.

40% Glass Fiber Reinforced PPS: >500°C (>932°F)

 

Radiant Panel Burn Test - ASTM E 162

The radiant panel burn test measures the surface flammability of materials when exposed to a radiant heat source. A 6 inch by 18 inch (15.2 cm by 45.7 cm) specimen is mounted with its long dimension inclined 30° off the vertical. The specimen is parallel to, but 4.75 inches (12 cm) away from, a radiant panel heat source maintained at 1238 ± 72°F (670 ± 22°C). A pilot burner ignites the top of the specimen, and the heat evolved by the specimen and its rate of burning are used to calculate a flame spread index, useful for comparing various materials.

 

40% Glass Fiber Reinforced PPS

65% Glass/Mineral Filled PPS

Average Thickness

0.134 in (3.4 mm)

0.134 in (3.4 mm)

Flame Spread Index

2 inches (5.1 mm)

2 inches (5.1 mm)

Visual Characteristics

charring, slight melting, light smoke

charring, light smoke

 

Smoke Density - ASTM E 662

This smoke test developed by the National Bureau of Standards employs a completely closed cabinet, measuring 36 inches by 36 inches by 24 inches (91 cm x 91 cm x 61 cm). A three inch (76 mm) square specimen is supported in a frame such that a surface area of 2.56 in² (16.5 cm²) is exposed to heat under either flaming or non-flaming (smoldering) conditions. The heat source is a circular foil radiometer adjusted to give a heat flux of 2.5 W/cm² at the specimen surface.

The smoke density is measured photometrically in terms of light absorption. The photometer path is vertical to minimize measurement differences due to smoke stratification which could occur with a horizontal photometer path at some fixed height. The full 36 inch (91 cm) height of the chamber is used to provide an overall average for the entire chamber. Smoke measurements are expressed in terms of specific optical density, which represents the optical density measured over unit path length within a chamber of unit volume, produced from a specimen of unit surface area. Since this value is dimensionless, it provides the advantage of presenting the smoke density measurement independent of chamber volume, specimen size or photometer path length, provided a consistent dimensional system is used.

The time to reach a critical smoke density, also called obscuration time, is a measure of the time available before a "typical" occupant in a "typical" room would find vision so obscured by smoke as to hinder escape. The value of specific optical density describing this critical level is 16, based on 16% light transmittance under certain specific conditions of room dimensions.

Material

Thickness 
in mm

Maximum Specific 
Optical Density

Obscuration 
Time, min

   

Smoldering

Flaming

Smoldering

Flaming

40% Glass Fiber Reinforced PPS

0.060 (1.5)

23

171

15.5

2.7

40% Glass Fiber Reinforced PPS

0.125 (3.2)

25

232

15.5

3.2

40% Glass Fiber Reinforced PPS

0.170 (4.3)

19

78

16.6

5.8

65% Glass/Mineral Filled PPS

0.170 (3.2)

16

44

18.6

8.6

Red Oak (for reference)

0.250 (6.3)

393

75

4.1

8.0

 

Ryton® PPS Compound

Thickness in mm

Specific Optical Density, Flaming

   

1.5 min

4.0 min

maximum

R-7-120BL

0.125 (3.2)

1

8

44

BR111BL

0.125 (3.2)

0

10

6

BR42B

0.125 (3.2)

0

6

79

 

Flammability of Interior Materials - FMVSS 302

This U.S. Federal Motor Vehicle Safety Standard (FMVSS) specifies burn resistance requirements for materials used in the occupant compartments of motor vehicles. A test specimen 14 inches (35.6 cm) long by 4.0 inches (10.2 cm) wide and up to 0.5 inches (1.3 cm) in thickness is mounted between two U-shaped steel brackets exposing an area 11 inches (27.9 cm) long by 2.0 inches (5.1 cm) wide, with an exposed edge at one end. 

The mounted specimen is placed horizontally and flatwise in a burning chamber, the exposed edge is ignited using a gas burner, and timing is started when the flame front progresses to a point 1.5 inches (3.8 cm) from the ignited edge of the specimen. A burn rate is determined by the time required for the flame front to progress to a point 9.5 inches (24.1 cm) from the ignited edge of the specimen, or the distance the flame front progresses within five minutes, or the time required and the distance the flame front progresses before the specimen self-extinguishes, whichever occurs first. The standard requires that the burn rate be no more than 4.0 inches/minute (10.2 cm/minute).

When Ryton® PPS compounds are tested according to this standard at thicknesses of 0.063 inches (1.6 mm) or thicker, the specimens will typically self-extinguish within five seconds, and before the flame front even progresses to a point 1.5 inches (3.8 cm) from the ignited edge of the specimen. Thus, Ryton® PPS compounds will self-extinguish before the timing to determine the burn rate is even initiated according to the test procedure.

 

Steiner Tunnel Test - ASTM E 84

The Steiner Tunnel test is intended to compare the flame spread and smoke generation behavior of various building materials when burning within a rectangular duct with air flowing through it. A specimen 24 ± 1.5 feet (7.3 ± 0.46 m) long by 22 ± 2 inches (56 ± 5 cm) wide and up to 4 inches (10 cm) thick is positioned along the top of a chamber measuring 25 ± 0.25 feet (7.62 ± 0.076 m) long by 17.75 ± 0.25 inches (45.1 ± 0.6 cm) wide by 12.0 ± 0.5 inches (30.5 ± 1.3 cm) in height. 

One end of the specimen is ignited by a gas burner in the presence of a controlled air flow through the chamber towards the opposite end of the specimen. The rate of progression of the flame front along the specimen is measured, and the smoke density is measured photometrically in a vent pipe at the exhaust end of the chamber. The recorded measurements are compared with the behavior of cement board and red oak wood to calculate a Flame Spread Index (FSI) and a Smoke Developed Index (SDI).

In this test, unfilled PPS gave an FSI of 5 and an SDI of 155, giving it “Classification A” according to the 2003 International Building Code® (Chapter 8 Interior Finishes, Section 803 Wall and Ceiling Finishes) and NFPA 5000 (Chapter 10 Interior Finish, Section 10.3 Interior Wall or Ceiling Finish Testing and Classification).

Non-Flammability

Ryton® PPS compounds are inherently flame resistant. All Ryton® PPS compounds have UL 94 V-0 and many have UL 94 5VA non-flammability ratings without using flame retardant additives. The limiting oxygen index, another good method of comparing the flammability of various materials, is the minimum percentage of oxygen in a test atmosphere that allows the plastic to support continued combustion. The limiting oxygen index of Ryton® PPS compounds is about 50%, making them among the most flame resistant plastics.

When comparing flammability ratings of engineering plastics, it is important to note that many require flame retardant additives to be classified UL 94 V-0. Flame retardant additives tend to be detrimental to the mechanical and electrical properties of a plastic. Most common flame retardant additives break down after a single pass through an injection molding machine, so parts molded using regrind will not be as flame retardant as parts molded from virgin material. Furthermore, the thermal degradation of flame retardant additives can produce toxic, corrosive off gasses. Since Ryton® PPS compounds require no flame retardant additives, regrind is as flame resistant as virgin material and the other undesirable effects of using flame retardant additives are also avoided.

Ryton-PPS-Oxygen-index-chart

Off-Gassing

Off-Gassing of PPS Compounds

 

Off-Gases from Ryton® PPS Compounds and Ryton® PPS Alloy Compounds

Parts molded from Ryton® PPS compounds typically exhibit no detectable off-gassing at temperatures below 50°C (122°F). Parts molded from Ryton® PPS Alloy compounds may have a mild odor.

The off-gasses from Ryton® PPS compounds and Ryton® PPS Alloy compounds at elevated temperatures typically consist of mostly water vapor and small amounts of carbon oxides and sulfides (such as carbon dioxide, carbon disulfide, carbon monoxide and carbonyl sulfide) and sulfur dioxide. The off-gasses will also include trace amounts of various low molecular weight (one to five carbon) aliphatic hydrocarbons and hydrocarbon oxidation products such as aldehydes, ketones, and carboxylic acids, as well as trace amounts of low molecular weight aromatic hydrocarbons, including some chlorine-containing and sulfur-containing aromatic hydrocarbon substances. The mixture of trace substances in the off-gasses is highly variable and dependent upon the temperature. Some of the off-gasses may be irritants to the eyes and respiratory tracts, therefore adequate ventilation of the processing area is recommended when melt processing Ryton® PPS compounds and Ryton® PPS Alloy compounds.

NASA Outgassing Test

Ryton® PPS compounds have successfully passed the NASA Outgassing Test, carried out in accordance with ASTM E 595. The test is conducted at 125°C (257°F) under a vacuum of less than 5 x 10-5 mm Hg over a period of 24 hours. The two values reported are the percent Total Mass Loss (% TML), which is the percent of total weight loss of material that volatilizes from the sample, and the percent Collected Volatile Condensable Material (% CVCM), which is the weight percent of material that volatilizes from the sample and then condenses at 25°C (77°F). The NASA outgassing requirement is a maximum of 1.0% TML and a maximum of 0.1% CVCM. All Ryton® PPS compounds tested have easily met the NASA specifications.

Ryton® PPS Compound

% TML

% CVCM

R-4

0.12

0.01

R-4-02XT

0.15

0.01

R-4-220NA

0.06

0.01

R-7-120BL

0.06

0.01

Drinking Water and Food Contact Standards

Potable Water, Food Contact and Medical Standards

Certain Ryton® PPS compounds and Ryton® PPS Alloy compounds can meet the requirements of various industry standards and regulations regarding use in applications requiring contact with potable water and food, as well as potential use for medical devices not requiring implantation. A summary is provided below. Please contact your nearest technical service center for further information.

Drinking Water

NSF Standard 61

  • R-4
  • R-4-02-XT
  • R-4-242-NA
  • R-4-242-BL
  • R-4-244-NA
  • R-4-244-BL
  • XE-5501-BL

BS6920 / WRAS 

  • R-4-242-NA
  • R-4-242-BL
  • R-4-244-NA
  • R-4-244-BL
  • XE-5030-BL
  • XE-5501-BL

W270 DVGW

  • R-4-242-NA
  • R-4-242-BL
  • R-4-244-NA
  • R-4-244-BL
  • XE-5501-BL

KTW

  • R-4-242-NA
  • R-4-242-BL
  • R-4-244-NA
  • R-4-244-BL
  • XE-5501-BL

ACS

  • R-4-242-NA
  • R-4-242-BL
  • R-4-244-NA
  • R-4-244-BL
  • XE-5501-BL

Food Contact

U.S. FDA and EU EC No. 10/2011

  • Includes EC No. 1935/2004, VGP/VC 3048441 and BfR/LFGB
  • R-4-232NA
  • Food Contact Status Letter for R-4-232NA
  • Includes EC No. 1935/2004, VGP/VC 3048441 and BfR/LFGB
  • Product Regulatory Overview for R-4-232NA
  • V-1, P Series, PR Series, QA Series and QC Series PPS Polymers
  • Food Contact Status Letter for PPS Polymers

U.S. FDA FCN 1083

  • V-1, P Series, PR Series, QA Series and QC Series PPS Polymers 
    For use with all types of food under Conditions of Use A through H and J.
  • FCN 1083 Letter

21 CFR 177.2490 (Coatings)

  • V-1 and PR11 Powders
  • 21 CFR 177.2490 Listing for PPS
Underwriters Laboratory

Underwriters Laboratory (UL)

Underwriters Laboratory (UL) Yellow Card certificates are available on our UL Database.

ASTM D4067

ASTM D4067 Call Outs

The ASTM D4067 Standard is a material call out system especially for polyphenylene sulfide (PPS) injection molding and extrusion materials. These material call outs are codes that may be used on part drawings or in other specifications to specify the use of PPS compounds having certain characteristics, without referring to any particular manufacturers or products. The ASTM D4067 material call outs listed here for our Ryton® PPS compounds represent the minimum performance characteristics of each particular product. An explanation of the meaning of these material call outs and how to determine whether a particular Ryton® PPS compound satisfies the call out given on a drawing (or other specification) is given below.

Ryton® PPS Product ASTM D4067 Callout
R-4-200NA PPS0000G40A73463
R-4-200BL PPS0000G40A63463
R-4-220NA PPS0000G40A63463
R-4-220BL PPS0000G40A63463
R-4-230NA PPS0000G40A53443
R-4-230BL PPS0000G40A53443
R-4 PPS000G40A53443
R-4-02 PPS0000G40A53443
R-4XT PPS0000G40A73463
R-4-02XT PPS0000G40A63463
BR111 PPS0000R65A55256
BR111BL PPS0000R65A55256
R-7-120NA PPS0000R66A24136
R-7-120BL PPS0000R66A24136
R-7-121NA PPS0000R64A24136
R-7-121BL PPS0000R64A24136
R-7-220BL PPS0000R65A55256

 

The first six or seven characters of the material call out, "PPS000" or "PPS0000," specify that the molding or extrusion compound must be PPS-based. The next character specifies the types of fillers and/or reinforcements used in the compound, and the following two characters specify the weight percent of reinforcements and/or fillers used in the compound. The next six characters in the material call out specify certain minimum physical property characteristics of the compound. The significance of each character and the requirements for a Ryton® PPS compound to satisfy a call out given on a drawing (or other specification) are explained below using the example callout "PPS0000G40A53343."

Character Significance Requirements
PPS0000 The molding or extrusion compound must be PPS-based. This is the generic PPS family designation. Currently, the call outs for all PPS compounds start with "PPS0000," but older call outs may start with "PPS000."
G Type of reinforcements and/or fillers: 
"C" for carbon or graphite fiber 
"G" for glass fiber 
"L" for lubricants 
"M" for mineral fillers 
"R" for mixtures of fillers and reinforcements
The letter in the call out of the Ryton® PPS compound must match the letter in the call out on the drawing or specification.
40 Nominal filler content in weight percent within the following tolerance ranges: 
± 2 wt. % for carbon or graphite fiber "C" 
± 2 wt. % for < 15% glass fiber "G" 
± 3 wt. % for > 15% glass fiber "G" 
± 2 wt. % for mineral fillers "M" 
± 3 wt. % for mixtures of fillers "R" 
(Tolerance ranges for lubricant content must be established by agreement between the supplier and the user.)
The filler content given in the call out of the Ryton® PPS compound must be within the specified tolerance range of the filler content given in the call out on the drawing or specification.
A References Physical Properties Requirements Table A in the ASTM D4067 Standard. All ASTM D4067 call outs should have the character "A" at the beginning of this extension.
5 Minimum Tensile Strength requirement according to performance levels defined in Table A in the ASTM D4067 Standard The number in the call out of the Ryton® PPS compound must be greater than or equal to the number given in the callout on the drawing or specification.
3 Minimum Flexural Modulus requirement according to performance levels defined in Table A in the ASTM D4067 Standard. The number in the callout of the Ryton® PPS compound must be greater than or equal to the number given in the call out on the drawing or specification.
3 Minimum Notched Izod Impact Strength requirement according to performance levels defined in Table A in the ASTM D4067 Standard. The number in the call out of the Ryton® PPS compound must be greater than or equal to the number given in the call out on the drawing or specification.
4 Minimum Flexural Strength requirement according to performance levels defined in Table A in the ASTM D4067 Standard. The number in the call out of the Ryton® PPS compound must be greater than or equal to the number given in the call out on the drawing or specification.
3 Minimum Density requirement according to performance levels defined in Table A in the ASTM D4067 Standard. The number in the call out of the Ryton® PPS compound must be greater than or equal to the number given in the call out on the drawing or specification.


Occasionally, material call outs will have further extensions or other unique notations to indicate special property requirements. Please contact our Quality Assurance representatives or Technical Service staffs regarding selection of Ryton® PPS compounds to meet these additional performance requirements.So, for example, Ryton® R-4-230NA PPS would satisfy the callouts "PPS0000G40A53343" or "PPS0000G40A43233." But Ryton® R-4-230NA PPS would not satisfy the call outs "PPS0000G45A53343" (wrong filler content) or "PPS0000R60A43233" (wrong filler type and content) or "PPS0000G40A63463" (may have insufficient tensile strength or flexural strength). Ryton® R-4-200NA PPS or Ryton® R-4-200BL PPS would satisfy the callout "PPS0000G40A63463."

ASTM D6358

ASTM D6358 Call Outs

The ASTM D6358 Standard is a material call out system especially for polyphenylene sulfide (PPS) injection molding and extrusion materials. These material call outs are codes that may be used on part drawings or in other specifications to specify the use of PPS compounds having certain characteristics, without referring to any particular manufacturers or products. The ASTM D6358 material call outs listed here for our Ryton® PPS compounds represent the minimum performance characteristics of each particular product. An explanation of the meaning of these material call outs and how to determine whether a particular Ryton® PPS compound satisfies the call out given on a drawing (or other specification) is given below.

 

Ryton® PPS Product ASTM D6358 Call out
R-4-200NA PPS0110G40A63473
R-4-200BL PPS0110G40A63463
R-4-220NA PPS0110G40A53463
R-4-220BL PPS0110G40A53463
R-4-230NA PPS0110G40A43453
R-4-230BL PPS0110G40A43453
R-4 PPS0110G40A43453
R-4-02 PPS0110G40A43453
R-4XT PPS0110G40A63473
R-4-02XT PPS0110G40A63463
BR111 PPS0120R65A44256
BR111BL PPS0120R65A44256
R-7-120NA PPS0120R66A34246
R-7-120BL PPS0120R66A34246
R-7-121NA PPS0120R64A33246
R-7-121BL PPS0120R64A33246
R-7-220BL PPS0120R65A44256

 

The first six characters of the material call out specify the PPS compound group and class, and will be followed by the grade designation as defined in ASTM D6358, or a "0" if properties are to be defined by the remainder of the call out. The next character specifies the types of fillers and/or reinforcements used in the PPS compound, and the following two characters specify the weight percent of reinforcements and/or fillers used in the PPS compound. The next six characters in the material call out (if present) specify certain minimum physical property characteristics of the PPS compound. The significance of each character and the requirements for a Ryton® PPS compound to satisfy a call out given on a drawing (or other specification) are explained below using the example call out "PPS0110G40A43353."

 

Character Significance Requirements
PPS0110 Specifies the Group and Class of the PPS compound: 
"011" or "0110" for General Purpose Glass Reinforced 
"012" or "0120" for General Purpose Glass and Mineral Filled 
"000" or "0000" for Other Types
The letters in the call out of the Ryton® PPS compound must match the letters in the call out on the drawing or specification.
G Type of reinforcements and/or fillers: 
"C" for carbon or graphite fiber 
"G" for glass fiber 
"L" for lubricants 
"M" for mineral fillers 
"R" for mixtures of fillers and reinforcements
The letter in the call out of the Ryton® PPS compound must match the letter in the call out on the drawing or specification.
40 Nominal filler content in weight percent within the following tolerance ranges: 
± 2 wt. % for carbon or graphite fiber "C" 
± 3 wt. % for glass fiber "G" 
± 3 wt. % for mineral fillers "M" 
± 3 wt. % for mixtures of fillers "R" 
(Tolerance ranges for lubricant content must be established by agreement between the supplier and the user.)
The filler content given in the call out of the Ryton® PPS compound must be within the specified tolerance range of the filler content given in the call out on the drawing or specification.
A References Physical Properties Requirements Table A in the ASTM D6358 Standard. If there is a letter "A" followed by five numbers, the Ryton® PPS compound must meet the requirements specified by the following five numbers.
4 Minimum Tensile Strength requirement according to performance levels defined in Table A in the ASTM D6358 Standard The number in the call out of the Ryton® PPS compound must be greater than or equal to the number given in the call out on the drawing or specification.
3 Minimum Flexural Modulus requirement according to performance levels defined in Table A in the ASTM D6358 Standard. The number in the call out of the Ryton® PPS compound must be greater than or equal to the number given in the call out on the drawing or specification.
3 Minimum Notched Izod Impact Strength requirement according to performance levels defined in Table A in the ASTM D6358 Standard. The number in the call out of the Ryton® PPS compound must be greater than or equal to the number given in the call out on the drawing or specification.
5 Minimum Flexural Strength requirement according to performance levels defined in Table A in the ASTM D6358 Standard. The number in the call out of the Ryton® PPS compound must be greater than or equal to the number given in the callout on the drawing or specification.
3 Minimum Density requirement according to performance levels defined in Table A in the ASTM D6358 Standard. The number in the call out of the Ryton® PPS compound must be greater than or equal to the number given in the callout on the drawing or specification.

So, for example, Ryton® R-4-230NA PPS would satisfy the call outs "PPS0110G40A43353" or "PPS0110G40A33243." But Ryton® R-4-230NA PPS would not satisfy the call outs "PPS0110R60A33243" (wrong filler type and content) or "PPS0110G40A63463" (may have insufficient tensile strength or flexural strength). Ryton® R-4-200NA PPS or Ryton® R-4-200BL PPS would satisfy the call out "PPS0110G40A63463."

Occasionally, material call outs will have further extensions or other unique notations to indicate special property requirements. Please contact our Quality Assurance representatives or Technical Service staffs regarding selection of Ryton® PPS compounds to meet these additional performance requirements.

Automotive

Automotive Specifications

Specifier Specification Ryton® PPS Products
Fiat Chrysler Automobiles MS-DB570 PPS Master 
Fiat Chrysler Automobiles CPN3243 R-7-120BL 
Fiat Chrysler Automobiles  CPN3502 R-4-200BL 
R-4-220BL 
R-4-02XT 
Fiat Chrysler Automobiles  CPN4241 R-4-220NA 
Fiat Chrysler Automobiles  CPN5100 BR42B 
Fiat Chrysler Automobiles  CS-9003 See End-Of-Life and 
Environmental Issues 
Ford WSF-M4D803-A2

R-7-120NA 
R-7-120BL 
R-7-190BL 

Ford WSG-M4D807-A3 R-4-200BL 
R-4-02XT 
Ford WSL-M4D807-A R-4-220NA 
R-4-220BL 
R-4-200BL 
Ford WSS-M99P9999-A1 See End-Of-Life and 
Environmental Issues
General Motors GMP.PPS.001 R-4XT 
R-4-02XT 
R-4-220NA 
R-4-220BL 
General Motors GMP.PPS.002 R-7-120NA 
R-7-120BL 
General Motors GMW3059 See End-Of-Life and 
Environmental Issues
CAMDS

China Automotive Materials Data System (CAMDS) Product Numbers

Ryton® PPS Product CAMDS ID Number Status*
BR111 CA_8_522608 Internal
BR111BL CA_8_550804 Internal
BR42B CA_8_560036 Internal
R-4-02XT CA_8_560066 Internal
R-4-200BL CA_8_560307 Internal
R-4-200NA CA_8_560303 Internal
R-4-220BL CA_8_560318 Internal
R-4-220NA CA_8_560312 Internal
R-4-230BL CA_8_560288 Internal
R-4-230NA CA_8_560103 Internal
R-7-120BL CA_8_559815 Internal
R-7-120NA CA_8_559797 Internal
R-7-121BL CA_8_559861 Internal
R-7-121NA CA_8_559842 Internal
R-7-220BL CA_8_559894 Internal
XE5500BL CA_8_560335 Internal
XK2340 CA_8_560325 Internal

* Published - Data is available to all CAMDS users 
Internal - Data is available only to companies that have had these products proposed to them

Fire Safety

Fire Safety Standards

AIRBUS ATS 1000-001

  • Ryton® R-4 PPS

NF F 16-101 (fire proof) 
NF T 51-071 
NF C 20-455

  • Ryton® R-4-200NA PPS Class I3
  • Ryton® R-4 PPS Class I2

NF F 16-101/102 (smoke index)

  • Ryton® R-4-200NA PPS Class F3
  • Ryton® R-4 PPS Class F4

NF X 10-702/70-100 (fumes and toxicity)

  • Ryton® R-4 PPS Class F3
Potable Water and Food Contact

Potable Water and Food Contact

Certain Ryton® PPS compounds and Ryton® PPS Alloy compounds can meet the requirements of various industry standards and regulations regarding use in applications requiring contact with potable water and food. A summary is provided below. Please contact your nearest technical service center for further information.

NSF Standard 61 (Drinking Water)*

  • R-4
  • R-4-02XT
  • R-4-220NA and R-4-220BL

BS6920 / WRAS (Drinking Water)

  • R-4-220NA and R-4-220BL
  • XE5030BL (ongoing)

W270 (Drinking Water)

  • R-4-220NA and R-4-220BL

KTW

  • R-4-220NA and R-4-220BL
  • R-4-232NA 
     

U.S. FDA and EU EC No. 10/2011 (Food Contact) 
Contact our technical experts for FDA and EU food contact letters that provide further details on specifications and/or limitations.

R-4-232NA 
 

  • Food Contact Status Letter for R-4-232NA
  • Includes EC No. 1935/2004, VGP/VC 3048441 and BfR/LFGB
  • Product Regulatory Overview for R-4-232NA 
     

V-1, P Series, PR Series, QA Series and QC Series PPS Polymers 
 

  • Food Contact Status Letter for PPS Polymers
IMDS

IMDS Product Numbers

IMDS Automotive Database Product Numbers 

 

Ryton® PPS Product IMDS ID Number Status*
BR111 10514846 Published
BR111BL 6730509 Published
BR42B 5739398 Internal
R-4 4982449 Published
R-4-02 4982960 Published
R-4-02XT 4984387 Published
R-4-200BL 4983306 Published
R-4-200NA 4983155 Published
R-4-220BL 4983594 Published
R-4-220NA 4983499 Published
R-4-230BL 5225030 Published
R-4-230NA 5224594 Published
R-4-240BL 73693568 Published
R-4-240NA 52412701 Published
R-4XT 4983902 Published
R-7-120BL 4984646 Published
R-7-120NA 4984541 Published
R-7-121BL 74567773 Published
R-7-121NA 72603460 Published
R-7-190BL 212649791 Internal
R-7-220BL 41005273 Published
XE4050BL 142347261 Internal
XE5030BL 60784299 Internal
XE5030NA 52629706 Internal
XK2340 5739215 Internal

* Published - Data is available to all IMDS users 
Internal - Data is available only to companies that have had these products proposed to them

Military

Military Specifications

Military specifications describe and organize the essential technical requirements for materials, services, subsystems and components needed for the Department of Defense (DOD). Though some military specifications parallel consensus standards and comparable federal specifications, many are uniquely military in character and demand high reliability. As a system of standards, military specifications comprise several levels of requirements organized very much like other major standards systems such as ASTM. They call out various test procedures, materials specifications, component requirements and, finally, the performance, certification, marking and other features of end-use products. Materials specifications define certain materials and classify them by the features and properties of available grades. At the next layer of standards, component specifications describe a particular part, subsystem or assembly which may be utilized in several end-use products. PPS compounds are widely used in components manufactured to meet the requirements of certain military specifications.

Many military component specifications now allow for the use of PPS materials as defined by either a military materials specification or a specific callout according to the ASTM D4067 standard classification system for PPS materials. For example, connectors manufactured to the requirements of MIL-DTL-55302F may use any PPS materials that will meet the requirements of MIL-M-24519 Type GST-40F or the callout requirements of ASTM D4067-90 PPS000G40A30330E01F01Y11. So even though there are no longer any Ryton® PPS products certified to MIL-M-24519 Type GST-40F, Ryton® PPS products which meet the requirements of the cited ASTM D4067 callout may still be used in connectors which must meet MIL-DTL-55302F requirements. Similar cases are found in other military component specifications. Listed below, are ASTM D4067 callouts for PPS materials that are cited in certain military component specifications, and the Ryton® PPS products that will meet the corresponding ASTM D4067 callout requirements.

Component Specification PPS Material Callout Ryton® PPS Products
MIL-DTL-55302F ASTM D4067-90 PPS000G40A30330E01F01Y11​ All R-4 Series Products​
MIL-DTL-83513F ASTM D4067-90 PPS000G40A30330E01F01Y11​​ All R-4 Series Products​

ASTM D4067 has replaced MIL-P-46174(MR) for specification of PPS materials. Historical MIL-P-46174(MR) class and grade designations for PPS materials are listed below, along with the corresponding ASTM D4067 callouts and Ryton® PPS products that will meet the corresponding ASTM D4067 callout requirements.

MIL-P-46174 (MR) ASTM D4067-90 Material Callout Ryton® PPS Products
Class 40 Grade A PPS000G40A43443​ All R-4 Series Products​
Class 40 Grade E​ PPS000G40A43443EA117ED041EE020​ All R-4 Series Products

Certain product "end-of-life" and environmental protection regulations, standards and initiatives require information regarding additives and trace impurities that may be present in Ryton® PPS compounds and Ryton® PPS Alloy compounds. Analyses for trace impurities in Ryton® PPS compounds and Ryton® PPS Alloy compounds are not conducted as part of routine lot certification procedures. The information provided below addresses whether or not certain substances are normally expected to be present in Ryton® PPS compounds and Ryton® PPS Alloy compounds.

Asbestos

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize any asbestos-containing additives.

AZO Compounds

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize any azo compounds or suspected carcinogenic amine compounds as additives or in the manufacturing process.

Conflict Minerals

The "conflict minerals" substances identified in U.S. H.R. 4173 Section 1502, gold (Au), tantalum (Ta), tin (Sn) and tungsten (W), are not normally expected to be present in Ryton® PPS compounds or Ryton® PPS Alloy compounds at concentrations exceeding 1 ppm. Gold (Au), tantalum (Ta), tin (Sn) and tungsten (W) are not intentionally used in the production of Ryton® PPS compounds or Ryton® PPS Alloy compounds and they may only be present as adventitious trace impurities in the products.

Conflict Minerals Non-Use Declaration Letter

DaimlerChrysler CS-9003

All currently produced Ryton® PPS compounds and Ryton® PPS Alloy compounds comply with the requirements of DaimlerChrysler CS-9003 Change E, except for the following products:

  • XE3035NA and XE3035BL
  • XE3500NA and XE3500BL
  • XE4050BL
  • XE5030NA and XE5030BL
  • XE5032BL
  • XE5315BL
  • XE5515BL
Dioxins / Furans

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize any dioxins or furans as additives or in the manufacturing process.

EC Directive 2000/53/EC (End of Life Vehicles)

All Ryton® PPS compounds and Ryton® PPS Alloy compounds comply with the requirements of Article 4.2a of EC Directive 2000/53/EC. All Ryton® PPS compounds and Ryton® PPS Alloy compounds are normally expected to contain less than 100 ppm lead, mercury, cadmium and hexavalent chromium. None of these substances are intentionally introduced as additives in any Ryton® PPS compounds or Ryton® PPS Alloy compounds, and these substances may only be present as adventitious trace impurities in the products.

End of Life Vehicles Compliance Letter

EC Directive 2002/96/EC (WEEE)

The substances mentioned in Annex II of EC Directive 2002/96/EC are not normally expected to be present in any Ryton® PPS compounds or Ryton® PPS Alloy compounds in amounts exceeding 1 ppm. Mercury, PCBs, PCTs, asbestos, processed mineral fibers, and radioactive substances are not intentionally introduced as additives in any Ryton® PPS compounds or Ryton® PPS Alloy compounds. Ryton® PPS compounds and Ryton® PPS Alloy compounds also do not utilize any low molecular weight CFCs, HCFCs, HFCs, HCs, or other suspected ozone-depleting substances as additives or in the manufacturing process. These substances may only be present as adventitious trace impurities in the products.

WEEE Compliance Letter

EC Directive 2003/11/EC (pentaBDE/octaBDE)

All Ryton® PPS compounds and Ryton® PPS Alloy compounds are normally expected to contain less than 0.1% pentabromodiphenylether (penta-BDE) and octabromodiphenylether (octa-BDE). Neither of these substances are intentionally introduced as additives in any Ryton® PPS compounds or Ryton® PPS Alloy compounds, and these substances may only be present as adventitious trace impurities in the products.

Penta-BDE and octa-BDE Compliance Letter

EU Directives 2011/65/EU and 2002/95/EC (RoHS)

All Ryton® PPS and Ryton® PPS Alloy products are normally expected to contain less than 0.01% cadmium, and less than 0.1% lead, mercury, chromium, polybrominated biphenyls (PBBs), and polybrominated diphenyl ethers (PBDEs), per the requirements of 2011/65/EU and 2002/95/EC as amended.

None of these substances are intentionally introduced as additives into any Ryton® PPS or Ryton® PPS Alloy products, and these substances may only be present as adventitious trace impurities in the products.

RoHS Compliance Letter

Ford WSS-M99P9999-A1

All currently produced Ryton® PPS compounds and Ryton® PPS Alloy compounds comply with the requirements of Ford WSS-M99P9999-A1 revised 2005 03 08.

General Motors GMW3059

All currently produced Ryton® PPS compounds and Ryton® PPS Alloy compounds comply with the requirements of General Motors GMW3059 Revision D.

Halogenated Aromatic Compounds

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize additives containing halogenated aromatic compounds such as hexachlorobenzene, pentachlorophenol (PCP), polybromobiphenyls (PBBs), polybromobiphenylethers (PBBEs), polybromobiphenyloxides (PBBOs), polybromodiphenylethers (PBDEs), polybromodiphenyloxides (PBDOs), polychlorobiphenyls (PCBs), polychloroterphenyls (PCTs), pentabromodiphenylether (penta-BDE), octabromodiphenylether (octa-BDE), decabromodiphenylether (deca-BDE), tetrabromobisphenol A, etc. Ryton® PPS compounds and Ryton® PPS Alloy compounds may contain up to 100 ppm of chlorinated aromatic hydrocarbon impurities consisting of residual p-dichlorobenzene (polyphenylene sulfide co-monomer) along with trace amounts of various monochloro aromatic hydrocarbons that arise as by-products of the polyphenylene sulfide (PPS)polymerization process.

Halogenated Aromatic Compounds Content Declaration Letter

Penta-BDE and octa-BDE Compliance Letter

deca-BDE Non-Use Declaration Letter

Halogenated Hydrocarbons

Listed below are the halogenated hydrocarbon substances normally expected to be present in currently produced Ryton® PPS compounds and Ryton® PPS Alloy compounds in amounts exceeding 1 ppm. Polyvinylchloride (PVC) is not utilized in Ryton® PPS compounds or Ryton®PPS Alloy compounds.

  • Ryton® PPS compounds and Ryton® PPS Alloy compounds may contain up to 100 ppm of chlorinated aromatic hydrocarbons consisting of residual p-dichlorobenzene (polyphenylene sulfide co-monomer) along with trace amounts of various monochloro aromatic hydrocarbons that arise as by-products of the polyphenylene sulfide (PPS) polymerization process.
  • Ryton® BR42B and BR42C PPS compounds contain polytetrafluoroethylene (PTFE).
  • Ryton® XE5515BL and XE5315BL PPS Alloy compounds contain a fluoropolymer additive.

Halogenated Aromatic Compounds Content Declaration Letter

Heavy & Trace Metals

Listed below are metals normally expected to be present in Ryton® PPS compounds and Ryton® PPS Alloy compounds in amounts exceeding 1 ppm. Other metals, including cadmium (Cd) and mercury (Hg), may only be present in Ryton® PPS compounds and Ryton®PPS Alloy compounds as adventitious trace impurities (not intentionally added to the products) in amounts not normally expected to exceed 1 ppm.

  • Ryton® PPS compounds and Ryton® PPS Alloy compounds utilize polymers, fillers and additives that include substances containing aluminum (Al), calcium (Ca), iron (Fe), magnesium (Mg), potassium (K), sodium (Na), titanium (Ti), and zinc (Zn).
  • Ryton® PPS compounds and Ryton® PPS Alloy compounds may contain up to 10 ppm of chromium (Cr) and up to 10 ppm of nickel (Ni) arising from corrosion of production equipment during the manufacturing process. These are adventitious trace impurities not intentionally added to the products. It has not been determined what fraction of the chromium is hexavalent chromium (Cr VI).
  • Glass fiber reinforced Ryton® PPS compounds and Ryton® PPS Alloy compounds may contain up to 20 ppm of lead (Pb) arising from adventitious lead oxide impurities incorporated in the glass (not lead metal). This is an adventitious trace impurity not intentionally added to the products.

Heavy and Trace Metals Content Declaration Letter

Ozone-Depleting Substances

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize any suspected ozone-depleting substances, such as low molecular weight CFCs, CHCs, HCFCs, HFCs, freons, halons, perfluorocarbons (PFCs), etc., as additives or in the manufacturing process. This includes the substances mentioned in the Montreal Protocol on Substances that Deplete the Ozone Layer and the EC Regulation 2037/2000.

Ozone-Depleting Substances Non-Use Declaration Letter

PFOS and PFOA Additives

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize any perfluorooctane sulfonate (PFOS) or perfluorooctonate (PFOA) additives.

PFOS and PFOA Non-Use Declaration Letter

Phosphorus Flame Retardants

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize any inorganic phosphorus flame retardant additives such as red phosphorus.

Phthalate Ester Additives

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize any phthalate ester additives such as butyl benzyl phthalate (BBP), dibutylphthalate (DBT), diethylphthalate, diethylhexylphthalate (DEHP), diisodecylphthalate (DIDP), diisononylphthalate (DINP), dimethylphthalate (DMP), dioctylphthalate (DNOP), etc.

Phthalate Ester Additives Non-Use Declaration Letter

Polycyclic Aromatic Hydrocarbons (PAHs)

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize any intentionally added polycyclic aromatic hydrocarbon additives. The carbon black pigment used in black color Ryton® PPS compounds and Ryton® PPS Alloy compounds may contain trace amounts of polycyclic aromatic hydrocarbons. However, extractable polycyclic aromatic hydrocarbons, such as those mentioned in EC Directive 2005/69/EC, are not normally expected to be present in Ryton® PPS compounds or Ryton® PPS Alloy compounds at concentrations exceeding 10 ppm.

Polycyclic Aromatic Hydrocarbons (PAH) Non-Use Declaration Letter

Processed Mineral Fibers

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize any processed mineral fibers or vitreous ceramic fibers having a mean fiber diameter of less than 5 microns.

Radioactive Substances

Ryton® PPS compounds and Ryton® PPS Alloy compounds do not utilize any radioactive substances as additives or in the manufacturing process.

REACH SVHCs

The substances on the SVHC (Substance of Very High Concern) candidate list for REACH (Registration Evaluation and Authorization of Chemicals, EC 1907/2006), as published by the European Chemicals Agency (ECHA), are not normally expected to be present in Ryton®PPS products or Ryton® PPS Alloy products at concentrations exceeding 1000 ppm.

In the production of polyphenylene sulfide (PPS), 1-Methyl-2-pyrrolidinone (NMP), CAS # 872-50-4, is used as a polymerization solvent. However, the amount of residual NMP that may remain as an impurity in Ryton® PPS products and Ryton® PPS Alloy products is less than 1000 ppm (0.1 weight percent). None of the other substances on the REACH SVHC candidate list are intentionally used in the production of Ryton® PPS products or Ryton® PPS Alloy products and they may only be present as adventitious trace impurities in the products. Solvay is committed to fulfill REACH obligations for all our products and their applications according to the REACH timeline.

European REACH Regulation - Substances of Very High Concern (SVHC) Letter

Extensive test data demonstrates that Ryton® PPS compounds, regardless of the filler and/or additives used, are virtually impervious to all common automotive fuels (including alcohol-containing flex fuels), lubricating oils, transmission fluids, brake fluids, and other hydraulic fluids. Although differences in fillers and additives can affect resistance to engine coolants, Ryton® PPS compounds are generally very resistant to glycol-based and silicone containing coolants, even at elevated temperatures.

Ryton® R-4-220NA is specially formulated for enhanced resistance to the detrimental effects of water at elevated temperatures (see Hot Water), and therefore tends to retain a greater degree of mechanical strength over long-term exposure to high temperature engine coolants, especially the more aggressive "OAT" and "hybrid" type “long-life” engine coolants.

AdBlue™ 32.5% Urea Solution
Effects of AdBlue™ 32.5% Urea Solution on Ryton® PPS Compounds
Ryton® PPS Compound 
Exposure Conditions

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4-220NA
28 Days at 140°F (60°C)

100%

96%

99%

28 Days at 176°F (80°C)

97%

93%

97%

R-7-120BL
28 Days at 140°F (60°C)

92%

95%

98%

28 Days at 176°F (80°C)

86%

89%

93%

XE5030BL
28 Days at 140°F (60°C)

98%

97%

98%

28 Days at 176°F (80°C)

94%

90%

98%


Transverse Swell

28 Days 
140°F (60°C)

28 Days 
176°F (80°C)

 

R-4-220NA

- 0.01 %

+ 0.02 %

 

R-7-120BL

+ 0.07 %

+ 0.02 %

 

XE5030BL

+ 0.15 %

+ 0.04 %

 

 

B-20 Soy Biodiesel Fuel
Effects of B-20 20% Soybean Oil Biodiesel Fuel on Ryton® PPS Compounds
Ryton® PPS Compound 
Hours at 194°F (90°C)

Tensile 
Strength 
Retained

Tensile 
Modulus 
Retained

Transverse 
Swell

R-4-200BL
1000 hours

100%

97%

0.1 %

3000 hours

98%

86%

0.8 %

5000 hours

100%

95%

0.0 %

R-7-120BL
1000 hours

105%

104%

- 1.0 %

3000 hours

102%

109%

0.4 %

5000 hours

104%

100%

- 0.1 %

XK2340
1000 hours

102%

100%

- 0.1 %

3000 hours

93%

99%

0.7 %

5000 hours

91%

102%

0.2 %

XE5030BL
1000 hours

102%

109%

0.1 %

3000 hours

101%

96%

0.7 %

5000 hours

100%

108%

- 0.1 %

 

Brake Fluid
Effects of Hydraulan® 400 DOT 4 Brake Fluid on Ryton® PPS and Ryton® PPS Alloy Compounds
Compound 
Hours at 248°F (120°C)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

Ryton® R-4-200NA
500 hours

102%

102%

0.2 %

1000 hours

103%

102%

0.3 %

2000 hours

104%

99%

0.4 %

Ryton® XE5030BL
500 hours

98%

100%

0.7 %

1000 hours

98%

101%

0.9 %

2000 hours

96%

98%

0.9 %

Ryton® XE4050BL
500 hours

96%

101%

0.6 %

1000 hours

97%

100%

0.8 %

2000 hours

94%

99%

0.8 %

Effects of Castrol® DOT 4 Brake Fluid on Ryton® PPS Compounds
Compound 
Hours at 248°F (120°C)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

Ryton® R-4-200NA
500 hours

102%

99%

0.1 %

1000 hours

102%

99%

0.3 %

2000 hours

101%

102%

0.2 %

Ryton® BR111
500 hours

108%

95%

0.1 %

1000 hours

108%

101%

0.2 %

2000 hours

105%

100%

0.2 %

Effects of DOT 3 Brake Fluid on Ryton® PPS Compounds
Compound 
Months at 250°F (121°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

Ryton® R-4
6 months

105%

103%

105%

12 months

110%

106%

103%

24 months

92%

106%

99%

Ryton® R-4 02XT
6 months

101%

106%

101%

12 months

113%

115%

101%

24 months

104%

110%

103%

Ryton® R-7
6 months

102%

107%

98%

12 months

112%

113%

100%

24 months

107%

109%

98%


Swell at 250°F (121°C)

Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

Ryton® R-4

- 0.7 %

+ 0.08 %

 

Ryton® R-4 02XT

- 0.1 %

+ 0.06 %

 

Ryton® R-7

- 0.7 %

0.00 %

 

Diesel Fuel
Effects of Diesel Fuel on Ryton® PPS Compounds
Ryton® PPS Compound 
Weeks at 200°F (93°C)

Tensile 
Strength 
Retained

R-4
8 weeks

100%

28 weeks

94%

52 weeks

99%

E-100 Fuel
Effects of E-100 (100% Ethanol) Fuel on Ryton® PPS Compounds
Ryton® PPS Compound 
Hours at 140°F (60°C)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

R-4-200BL
500 hours

103%

98%

0.0 %

1000 hours

101%

100%

- 0.1 %

2000 hours

102%

102%

- 0.1 %

R-7-120BL
500 hours

102%

102%

0.0 %

1000 hours

99%

103%

0.0 %

2000 hours

101%

100%

- 0.1 %

BR111BL
500 hours

104%

103%

0.0 %

1000 hours

102%

101%

0.0 %

2000 hours

103%

100%

0.0 %

E-85 Fuel
Effects of E-85 (85% Ethanol) Fuel on Ryton® PPS Compounds
Ryton® PPS Compound 
Hours at 140°F (60°C)

Tensile 
Strength 
Retained

Tensile 
Modulus 
Retained

Transverse 
Swell

R-4-200BL
1000 hours

103%

94%

- 1.4 %

3000 hours

100%

94%

0.6 %

5000 hours

101%

90%

- 0.8 %

R-7-120BL
1000 hours

109%

101%

- 0.6 %

3000 hours

100%

104%

0.1 %

5000 hours

105%

114%

- 0.8 %

XK2340
1000 hours

79%

89%

1.6 %

3000 hours

72%

68%

2.6 %

5000 hours

72%

82%

2.8 %

XE5030BL
1000 hours

101%

108%

0.1 %

3000 hours

98%

102%

0.8 %

5000 hours

98%

112%

0.2 %

Engine Coolant

Effects of Engine Coolants on Ryton® PPS Compounds

Glysantin® G05
Ryton® PPS Compound 
Hours at 140°C (284°F)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

R-4-220NA
500 hours

83%

91%

0.3 %

1000 hours

83%

98%

- 0.1 %

2000 hours

81%

97%

0.3 %

BR111BL
500 hours

72%

86%

0.4 %

1000 hours

65%

89%

0.1 %

2000 hours

57%

91%

0.5 %

R-7-120BL
500 hours

80%

97%

0.5 %

1000 hours

73%

98%

0.4 %

2000 hours

70%

92%

0.5 %

R-7-220NA
500 hours

86%

96%

0.3 %

1000 hours

87%

86%

0.1 %

2000 hours

82%

92%

0.5 %

Glysantin® G48
Ryton® PPS Compound 
Hours at 140°C (284°F)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

R-4-220NA
500 hours

85%

103%

0.2 %

1000 hours

84%

103%

0.1 %

2000 hours

85%

101%

0.2 %

3000 hours

80%

101%

0.1 %

4500 hours

87%

102%

0.2 %

6000 hours

90%

106%

0.2 %

BR111BL
500 hours

73%

92%

0.3 %

1000 hours

61%

96%

0.2 %

2000 hours

59%

90%

0.3 %

R-7-120BL
500 hours

79%

97%

0.5 %

1000 hours

73%

98%

0.5 %

2000 hours

70%

94%

0.3 %

R-7-220NA
500 hours

87%

97%

0.2 %

1000 hours

81%

96%

0.3 %

2000 hours

85%

96%

0.4 %

XE5030BL
500 hours

61%

98%

0.4 %

1000 hours

55%

99%

0.3 %

2000 hours

56%

100%

0.2 %

XE4050BL
500 hours

59%

99%

0.3 %

1000 hours

55%

99%

0.3 %

2000 hours

56%

98%

0.3 %

Glysantin® G34
Ryton® PPS Compound 
Hours at 140°C (284°F)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

R-4-220NA
500 hours

81%

102%

0.1 %

1000 hours

78%

106%

- 0.1 %

2000 hours

72%

105%

0.2 %

R-4-200NA
500 hours

64%

101%

0.3 %

1000 hours

55%

105%

0.2 %

2000 hours

45%

99%

0.3 %

BR111BL
500 hours

70%

95%

0.2 %

1000 hours

63%

97%

0.1 %

2000 hours

53%

90%

0.2 %

R-7-120BL
500 hours

75%

93%

0.2 %

1000 hours

75%

95%

0.0 %

2000 hours

69%

92%

0.3 %

R-7-220NA
500 hours

86%

104%

0.2 %

1000 hours

83%

100%

0.3 %

2000 hours

79%

96%

0.3 %

Texaco AFC
Ryton® PPS Compound 
Hours at 140°C (284°F)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

R-4-220NA
500 hours

83%

111%

0.1 %

1000 hours

80%

105%

0.2 %

2000 hours

79%

107%

0.5 %

R-4-200NA
500 hours

62%

108%

0.2 %

1000 hours

54%

103%

0.4 %

2000 hours

51%

104%

0.5 %

BR111BL
500 hours

72%

97%

0.2 %

1000 hours

66%

95%

0.3 %

2000 hours

62%

94%

0.5 %

R-7-120BL
500 hours

74%

97%

0.1 %

1000 hours

72%

98%

0.2 %

2000 hours

72%

93%

0.6 %

R-7-220NA
500 hours

90%

101%

0.0 %

1000 hours

86%

104%

0.3 %

2000 hours

83%

101%

0.5 %

Texaco XLC
Ryton® PPS Compound 
Hours at 140°C (284°F)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

R-4-220NA
500 hours

80%

105%

0.2 %

1000 hours

76%

105%

0.2 %

2000 hours

74%

111%

---

R-4-200NA
500 hours

63%

103%

0.4 %

1000 hours

52%

103%

0.4 %

2000 hours

44%

95%

---

BR111BL
500 hours

70%

96%

0.3 %

1000 hours

61%

97%

0.3 %

2000 hours

50%

90%

---

R-7-120BL
500 hours

75%

95%

0.2 %

1000 hours

71%

95%

0.3 %

2000 hours

71%

95%

---

R-7-220NA
500 hours

89%

106%

0.3 %

1000 hours

85%

103%

0.2 %

2000 hours

82%

99%

---

Fleetguard® ES Compleat
Ryton® PPS Compound 
Hours at 140°C (284°F)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

R-4-220BL
500 hours

85%

101%

0.3 %

1000 hours

82%

101%

0.3 %

2000 hours

77%

99%

0.3 %

XE5030BL
500 hours

74%

99%

0.3 %

1000 hours

67%

98%

0.2 %

2000 hours

60%

98%

0.1 %

Dexcool®
Ryton® PPS Compound 
Hours at 130°C (266°F)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

R-4-220BL
500 hours

90%

97%

0.2 %

1000 hours

95%

98%

0.3 %

2000 hours

98%

103%

0.3 %

5000 hours

92%

102%

0.4 %

R-7-120BL
500 hours

86%

90%

0.1 %

1000 hours

92%

97%

0.1 %

2000 hours

92%

105%

0.2 %

5000 hours

94%

97%

0.4 %

Procor 3000
Ryton® PPS Compound 
Hours at 130°C (266°F)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4-220NA
500 hours

71%

72%

110%

1000 hours

67%

67%

98%

2000 hours

67%

64%

96%

R-7-120NA
500 hours

71%

77%

100%

1000 hours

68%

72%

90%

2000 hours

67%

72%

88%

Conventional Ethylene Glycol Engine Coolant
Ryton® PPS Compound 
Months at 250°F (121°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
6 months

77%

103%

103%

12 months

94%

92%

98%

24 months

70%

76%

94%

R-4-02XT
6 months

94%

98%

101%

12 months

67%

87%

95%

24 months

84%

89%

98%

R-7
6 months

105%

107%

97%

12 months

108%

107%

100%

24 months

87%

94%

91%


Swell at 250°F (121°C)

Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

R-4

- 0.7 %

+ 0.09 %

 

R-4-02XT

+ 0.1 %

+ 0.03 %

 

R-7

- 0.5 %

+ 0.07 %

 

50:50 Coolant:Water Mixtures

 

FAM B Fuel
Effects of FAM B Fuel on Ryton® PPS Compounds
Ryton® PPS Compound 
Hours at 140°F (60°C)

Tensile 
Strength 
Retained

Tensile 
Modulus 
Retained

Transverse 
Swell

R-4-200BL
1000 hours

100%

97%

0.4 %

3000 hours

100%

96%

2.2 %

5000 hours

102%

100%

1.2 %

R-7-120BL
1000 hours

103%

106%

- 0.3 %

3000 hours

101%

108%

2.0 %

5000 hours

105%

110%

0.8 %

XK2340
1000 hours

85%

82%

1.9 %

3000 hours

75%

79%

3.7 %

5000 hours

77%

89%

3.5 %

XE5030BL
1000 hours

91%

94%

0.6 %

3000 hours

93%

97%

3.4 %

5000 hours

92%

111%

3.5 %

Gasahol I
Effects of Gasohol I on Ryton® PPS Compounds
Ryton® PPS Compound 
Months at 200°F (93°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
6 months

90%

102%

100%

12 months

110%

104%

100%

24 months

81%

112%

100%

R-4-02XT
6 months

98%

105%

98%

12 months

115%

110%

96%

24 months

82%

112%

94%

R-7
6 months

85%

106%

87%

12 months

108%

106%

99%

24 months

74%

109%

93%


Swell at 200°F (93°C)

Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

R-4

- 1.0 %

+ 0.05 %

 

R-4-02XT

- 0.5 %

+ 0.05 %

 

R-7

- 0.7 %

+ 0.02 %

 

Gasohol I - 15% ethanol, 85% gasoline

Gasahol II
Effects of Gasohol II on Ryton® PPS Compounds
Ryton® PPS Compound 
Months at 200°F (93°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
6 months

104%

101%

98%

12 months

105%

101%

94%

24 months

105%

110%

98%

R-4-02XT
6 months

92%

103%

96%

12 months

105%

106%

101%

24 months

87%

101%

94%

R-7
6 months

91%

101%

94%

12 months

104%

105%

99%

24 months

108%

106%

95%


Swell at 200°F (93°C)
Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

R-4

+ 0.2 %

+ 0.08 %

 

R-4-02XT

+ 0.5 %

+ 0.06 %

 

R-7

- 0.3 %

+ 0.03 %

 

Gasohol II - 4.75% methanol, 4.75% t-butyl alcohol, 90.5% gasoline

 

M-85 Fuel
Effects of M85 Fuel on Ryton® PPS Compounds
Ryton® PPS Compound 
Months at 200°F (93°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
6 months

100%

102%

98%

12 months

101%

102%

101%

24 months

79%

102%

97%

R-4-02XT
6 months

94%

100%

95%

12 months

104%

103%

100%

24 months

75%

97%

97%

R-7
6 months

87%

100%

96%

12 months

103%

105%

100%

24 months

73%

104%

95%


Swell at 200°F (93°C)

Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

R-4

- 0.8 %

0.00 %

 

R-4-02XT

- 0.3 %

0.00 %

 

R-7

- 0.7 %

- 0.02 %

 

M85 Fuel - 85% methanol, 15% gasoline

Motor Oil

Effects of Motor Oils on Ryton® PPS Compounds

Esso 0W-30 Oil
Ryton® PPS Compound 
Hours at 338°F (170°C)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

R-4-200NA
500 hours

98%

99%

0.0 %

1000 hours

94%

101%

0.1 %

2000 hours

79%

105%

- 0.1 %

BR42B
500 hours

98%

101%

- 0.1 %

1000 hours

92%

103%

0.1 %

2000 hours

79%

103%

- 0.1 %

BR111
500 hours

101%

98%

0.0 %

1000 hours

98%

102%

0.0 %

2000 hours

92%

104%

- 0.1 %

ELF XT4596 15W-40 Oil
Ryton® PPS Compound 
Hours at 329°F (165°C)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

R-4-200BL
500 hours

90%

103%

- 0.2 %

1000 hours

86%

99%

- 0.1 %

2000 hours

78%

103%

- 0.2 %

XK2340
500 hours

98%

104%

- 0.3 %

1000 hours

94%

101%

- 0.3 %

2000 hours

86%

102%

- 0.2 %

Liqui Moly 10W-40 Oil
Ryton® PPS Compound 
Hours at 320°F (160°C)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Transverse 
Swell

XK2340
1000 hours

94%

112%

- 0.3 %

2000 hours

89%

108%

- 0.4 %

3000 hours

82%

107%

- 0.2 %

Mobil 1 5W-50 Oil
Ryton® PPS Compound 
Hours at 284°F (140°C)

Tensile 
Strength 
Retained

Flexural 
Modulus 
Retained

Impact 
Strength 
Retained

XE5030BL
500 hours

102%

89%

97%

1000 hours

101%

89%

93%

2000 hours

98%

89%

94%

3000 hours

99%

90%

88%

XE4050BL
500 hours

102%

111%

95%

1000 hours

98%

109%

91%

2000 hours

97%

111%

92%

3000 hours

98%

112%

89%

Mobil 1 Synthetic Oil
Ryton® PPS Compound 
Months at 300°F (149°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
6 months

103%

99%

105%

12 months

94%

100%

78%

24 months

89%

100%

90%

R-4-02XT
6 months

94%

101%

102%

12 months

101%

104%

74%

24 months

98%

103%

97%

R-7
6 months

94%

100%

100%

12 months

94%

104%

76%

24 months

92%

102%

93%


Swell at 300°F (149°C)

Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

R-4

- 0.9 %

+ 0.06 %

 

R-4-02XT

- 0.1 %

+ 0.04 %

 

R-7

- 0.5 %

+ 0.01 %

 
SAE 30 Oil
Ryton® PPS Compound 
Months at 300°F (149°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
6 months

100%

100%

101%

12 months

96%

101%

97%

24 months

84%

99%

94%

R-4-02XT
6 months

95%

102%

100%

12 months

104%

104%

100%

24 months

91%

101%

94%

R-7
6 months

94%

101%

97%

12 months

100%

102%

100%

24 months

94%

102%

94%


Swell at 300°F (149°C)

Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

R-4

- 0.7 %

+ 0.04 %

 

R-4-02XT

- 0.1 %

+ 0.01 %

 

R-7

- 0.7 %

- 0.02 %

 

Power Steering Fluid
Effects of Type 94-A Power Steering Fluid on Ryton® PPS Compounds
Ryton® PPS Compound 
Hours at 302°F (150°C)

Tensile 
Strength 
Retained

Tensile 
Modulus 
Retained

Transverse 
Swell

R-4-200BL
500 hours

103%

100%

- 0.2 %

1000 hours

102%

97%

0.0 %

2000 hours

102%

99%

- 0.1 %

R-7-120BL
500 hours

100%

98%

- 0.1 %

1000 hours

101%

97%

0.1 %

2000 hours

97%

93%

- 0.1 %

XK2340
500 hours

93%

103%

- 0.2 %

1000 hours

94%

103%

- 0.1 %

2000 hours

85%

101%

0.0 %

XE5030BL
500 hours

102%

100%

0.0 %

1000 hours

100%

102%

0.1 %

2000 hours

97%

98%

0.1 %

Sour Gasoline
Effects of Sour Gasoline on Ryton® PPS Compounds
Ryton® PPS Compound 
Months at 200°F (93°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
6 months

103%

103%

103%

12 months

103%

106%

101%

24 months

99%

111%

101%

R-4-02XT
6 months

99%

96%

102%

12 months

106%

105%

98%

24 months

102%

109%

100%

R-7
6 months

111%

103%

96%

12 months

108%

106%

99%

24 months

102%

111%

98%


Swell at 200°F (93°C)
Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

R-4

- 1.1 %

+ 0.10 %

 

R-4-02XT

- 0.3 %

+ 0.12 %

 

R-7

- 0.7 %

+ 0.11 %

 

Sour Gasoline - per Ford (MC) AZ1-5

Transmission Fluid
Effects of Type 94-A Transmission Fluid on Ryton® PPS Compounds
Ryton® PPS Compound 
Hours at 302°F (150°C)

Tensile 
Strength 
Retained

Tensile 
Modulus 
Retained

Transverse 
Swell

R-4-200BL
500 hours

103%

100%

- 0.2 %

1000 hours

102%

97%

0.0 %

2000 hours

102%

99%

- 0.1 %

R-7-120BL
500 hours

100%

98%

- 0.1 %

1000 hours

101%

97%

0.1 %

2000 hours

97%

93%

- 0.1 %

XK2340
500 hours

93%

103%

- 0.2 %

1000 hours

94%

103%

- 0.1 %

2000 hours

85%

101%

0.0 %

XE5030BL
500 hours

102%

100%

0.0 %

1000 hours

100%

102%

0.1 %

2000 hours

97%

98%

0.1 %

Effects of BOT 341 Transmission Fluid on Ryton® PPS Compounds
Ryton® PPS Compound 
Hours at 302°F (150°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4-200NA
500 hours

100%

100%

104%

1000 hours

98%

99%

104%

2000 hours

97%

93%

103%

R-4-240NA
500 hours

102%

101%

103%

1000 hours

101%

100%

104%

2000 hours

100%

97%

104%

Effects of Type F Transmission Fluid on Ryton® PPS Compounds
Ryton® PPS Compound 
Months at 300°F (149°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
6 months

100%

100%

100%

12 months

104%

105%

102%

24 months

86%

100%

96%

R-4-02XT
6 months

99%

103%

99%

12 months

110%

111%

101%

24 months

98%

105%

97%

R-7
6 months

104%

102%

97%

12 months

104%

109%

101%

24 months

96%

103%

94%


Swell at 300°F (149°C)

Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

R-4

- 0.9 %

+ 0.08 %

 

R-4-02XT

- 0.7 %

+ 0.02 %

 

R-7

- 0.7 %

0.00 %

 

Unleaded Gasoline
Effects of Unleaded Gasoline on Ryton® PPS Compounds
Ryton® PPS Compound 
Months at 200°F (93°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
6 months

106%

101%

102%

12 months

104%

104%

103%

24 months

83%

104%

94%

R-4-02XT
6 months

105%

104%

101%

12 months

110%

108%

100%

24 months

84%

109%

94%

R-7
6 months

108%

102%

98%

12 months

106%

102%

99%

24 months

73%

104%

90%


Swell at 200°F (93°C)

Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

R-4

- 0.6 %

+ 0.10 %

 

R-4-02XT

- 0.3 %

+ 0.14 %

 

R-7

- 0.7 %

+ 0.06 %

 

Used Motor Oil
Effects of Used Motor Oil on Ryton® PPS Compounds
Ryton® PPS Compound 
Months at 300°F (149°C)

Tensile 
Strength 
Retained

Flexural 
Strength 
Retained

Flexural 
Modulus 
Retained

R-4
6 months

103%

99%

106%

12 months

98%

101%

99%

24 months

79%

101%

91%

R-4-02XT
6 months

105%

100%

100%

12 months

107%

107%

101%

24 months

91%

103%

95%

R-7
6 months

105%

98%

97%

12 months

100%

101%

99%

24 months

100%

102%

92%


Swell at 300°F (149°C)

Transverse 
Direction 
9 months

Flow 
Direction 
18 months

 

R-4

- 0.7 %

+ 0.06 %

 

R-4-02XT

+ 0.1 %

+ 0.01 %

 

R-7

- 0.3 %

+ 0.02 %

 

Rod, Plate and Tube Stock Shapes made of Ryton® PPS

Machining parts from rods, sheets or hollow forms provides an alternative to injection molding for producing heavy walled parts (not possible by injection molding), or to avoid mold construction costs for smaller production quantities or prototyping.

 

Ryton® PPS Compression Molded Stock Shapes

Large stock shapes made from our Ryton® PPS injection molding compounds are not available because the injection molding compounds are not suitable for producing thick forms. Specialty compression molders are able to supply compression molded PPS rod, plate and tube stock, but it is important to understand that parts machined from compression molded stock shapes will likely not perform the same as parts injection molded from Ryton® PPS injection molding compounds. There are several reasons for this:

  • Ryton® PPS injection molding compounds are generally not suitable for compression molding, therefore for compression molding, processors typically purchase raw PPS polymers and blend them with their own combinations of fillers and other additives, formulating compounds that are different from our injection molding compounds.
  • In the compression molding process the PPS compound is subjected to an entirely different heat and stress history than is encountered in the molding of articles from injection molding compounds, and the frictional heat of machining operations can also cause development of localized stresses.
  • Being a semi-crystalline thermoplastic, PPS is notch sensitive, so surface defects from machining operations may act as crack propagators and compromise the mechanical strength of a part.
  • The machined surface, with fillers and reinforcements exposed, is more prone to abrasion and more susceptible to fluid penetration than a "resin rich" molded surface.

Unlike injection molded parts, the mechanical properties of compression molded PPS stock materials are generally more isotropic due to a more random filler distribution and/or glass fiber alignment. The mechanical strength of compression molded PPS stock materials will typically be no more than 50% to 80% of the strength of Ryton® PPS injection molding compounds with similar filler systems, and the effects of machining can dramatically reduce part strength even further.

Compressive properties, dimensional stability, thermal stability and chemical resistance of compression molded PPS stock materials should generally be similar to Ryton® PPS injection molding compounds with similar filler systems. The exposed fillers and reinforcements on a machined surface, however, make the part more prone to fluid penetration, so chemical exposure may tend to cause more swelling and more rapid strength deterioration.

The electrical properties of compression molded PPS stock materials should typically be about the same as Ryton® PPS injection molding compounds with similar filler systems.

Bear in mind, however, that some Ryton® PPS injection molding compounds are specially formulated to enhance certain performance characteristics such as impact resistance, electrical properties and hydrolytic stability.