Amodel® polyphthalamide (PPA) is an aromatic polyamide that outperforms standard polyamides with higher strength and stiffness at elevated temperatures, better retention of properties in humid environments, and greater resistance to a broader range of chemicals.

 

Higher Heat Resistance

Amodel® PPA is used to replace metal in high-temperature automotive applications. Continuous-use temperatures range from 120°C to 185°C (248°F to 365°F). Heat deflection temperatures (HDT) go up to 310°C (590°F).

 

Thermal properties comparison, ASTM test method

Amodel-thermal-properties

 

Lower Moisture Absorption

Humid environments can have a devastating effect on the mechanical properties of standard polyamides. Amodel® PPA’s lower water absorption rate results in significantly less change in strength and stiffness, even with high levels of humidity.

Effect of moisture on tensile strength, ASTM test method

Amodel-moisture-and-tensile-strength

 

Effect of moisture on flexural modulus, ASTM test method

Amodel-moisture-and-flexural-modulus

 

Better Chemical Resistance

Amodel® PPA’s highly aromatic ring structure provides greater resistance to a broader range of chemicals than standard aliphatic polyamides, even at high temperatures. This enables automotive, electrical and industrial components to withstand prolonged exposure to harsh chemicals:

  • Bio-diesel fuel
  • Brake fluid
  • Calcium chloride
  • Glycols
  • Synthetic motor oil
  • Road salt
  • Sulfuric acid
  • Transmission fluid
  • Zinc chloride
Base Resins

How We Make the Amodel® PPA Grades

Our polyphthalamide products are based primarily on three semi-aromatic, semi-crystalline polyamide base resins, with each offering distinct performance and processing characteristics.

Glass fibers, heat stabilizers, impact modifiers, minerals and other materials are compounded with these base resins to create a comprehensive selection of Amodel® PPA products for use in a vast array of applications.

Amodel® PPA Base Resins
Base Resin Processing Description Tg Tm
°C °F °C °F
A-1000 Series Hot-oil moldable (mold temp >135°C) High long-term thermal performance. High-flow HFZ grades available. 123 253 313 595
A-4000 Series Hot-water moldable (temp <100°C) Fastest crystallization for very fast cycle times. Compatible with SMT processing. High-flow HFZ grades available. 100 212 325 617
A-6000 Series Hot-water moldable (mold temp <100°C) Excellent processing characteristics and surface appearance. 88 190 310 590
A-8000 Series Hot-oil moldable (mold temp >135°C) Highest long-term thermal performance. Best resistance to chemicals and moisture. 130 266 325 617
Standard Glass Fiber Reinforced Grades

Glass fibers boost strength and stiffness, while enhancing short-term thermal properties as well as long-term resistance to creep and fatigue. For applications requiring wall thickness greater than 3 mm (0.125 in.), consider one our AS grades.

Strength and stiffness comparison, ASTM test method

Amodel-strength-and-stiffness

 

 

Glass Fiber Reinforced Grades
Amodel® A-1133 HS 33% glass fiber, general purpose, heat stabilized
Amodel® A-1145 HS 45% glass fiber, general purpose, heat stabilized
Amodel® A-1565 HS 65% mineral/glass fiber, heat stabilized
Amodel® A-1933 HSL 33% glass fiber, glycol resistant, heat stabilized, lubricated
Amodel® A-4160 HSL 60% glass fiber, highest modulus, fast cycle time, hot-water moldable, heat stabilized, lubricated
Amodel® A-6135 HN 35% glass fiber, high flow, hot-water moldable, heat stabilized, not lubricated
Amodel® A-8930 HS 30% glass fiber, glycol resistant, heat stabilized
Amodel® A-8940 HS 40% glass fiber, glycol resistant, heat stabilized
Amodel® A-8950 HS 50% glass fiber, glycol resistant, heat stabilized
Grades for Wall Thicknesses >3 mm
Amodel® AS-1133 HS 33% glass fiber, general purpose, heat stabilized
Amodel® AS-1145 HS 45% glass fiber, general purpose, heat stabilized
Amodel AS-1566 HS 65% mineral/glass fiber, heat stabilized
Amodel® AS-1933 HS 33% glass fiber, glycol resistant, heat stabilized 
Amodel® AS-1935 HS 35% glass fiber, glycol resistant, heat stabilized
Amodel® AS-1945 HS 45% glass fiber, glycol resistant, heat stabilized
Amodel® AS-4133 HS 33% glass fiber, fast cycle time, hot-water moldable, heat stabilized, lubricated
Amodel® AS-4133 L 33% glass fiber, fast cycle time, hot-water moldable, lubricated
Amodel® AS-4145 HS 45% glass fiber, fast cycle time, hot-water moldable, heat stabilized, lubricated
Drinking Water Grades
Drinking Water Grades
Amodel® DW-1130 30% glass fiber, approved for potable water contact
Amodel® DW-1140 40% glass fiber, approved for potable water contact
Amodel® DW-1150 50% glass fiber, approved for potable water contact
Food Contact Grades
Food Contact Grades
Amodel® FC-1140 40% glass fiber, approved for food contact
Amodel® FC-1150 50% glass fiber, approved for food contact
Amodel® FC-1160 60% glass fiber, approved for food contact
Carbon Fiber Reinforced Grades
Carbon Fiber Reinforced Grades
Amodel® A-1625 HS 25% carbon fiber, conductive, heat stabilized
Impact Modified Grades

Impact modifiers add toughness and increase impact resistance. Toughened Amodel® PPA products are designated with the AT prefix. For applications needing low modulus at high temperature, consider an unfilled toughened grade.

Improved impact resistance, ASTM test method

Amodel-impact-resistance

 

Toughened Grades
Amodel® AT-1001 L Unreinforced, impact modified, lubricated
Amodel® AT-1002 HS Unreinforced, impact modified, heat stabilized
Amodel® AT-1116 HS 16% glass fiber, impact modified, heat stabilized
Amodel® AT-1125 HS 25% glass fiber, impact modified, heat stabilized
Amodel® AT-6115 HS 15% glass fiber, impact modified, high flow, hot-water moldable, heat stabilized
Amodel® AT-6130 HS 30% glass fiber, impact modified, high flow, hot-water moldable, heat stabilized
Amodel® ET-1000 HS Highly impact modified, heat stabilized
Mineral/Glass Fiber Reinforced Grades

Minerals reduce warpage and differential shrinkage by disrupting the orientation of the glass fiber. This results in more uniform shrinkage and improves dimensional stability.

 

Coefficient of Linear Thermal Expansion
Temperature Direction Test Method Units

Amodel®
A-1133 HS 

33% Glass

Amodel®
AS-1566 HS 

65% Mineral/Glass

0° to 100°C Flow ASTM E831 ppm/°C 24 17
0° to 100°C Transverse ASTM E831 ppm/°C 55 40
100° to 200°C Flow ASTM E831 ppm/°C 27 17
100° to 200°C Transverse ASTM E831 ppm/°C 115 72

 

Data Sheet: Amodel® A-1133 HS 

Data Sheet: Amodel® AS-1566 HS

 

 

Mineral/Glass Fiber Reinforced Grades
Amodel® A-1565 HS 65% mineral/glass fiber, heat stabilized
Amodel® AS-1566 HS 65% mineral/glass fiber, heat stabilized, for wall thicknesses >3 mm
High Flow Grades

High flow grades improve the molding of thin-walled components typical of electronics applications. They are designated with HFZ followed by standard Amodel® PPA nomenclature.

 

Amodel-spiral-flow

 

 

High-Flow Grades
Amodel HFZ A-4133 L 33% glass fiber, high flow, fast cycle time, hot-water moldable, lubricated
High Reflectivity Grades
High reflectivity grades for LEDs
Amodel® A-1133 NL WH505 33% glass fiber, high-reflectivity white for LEDs
Amodel® A-4122 HR WH117 22% glass fiber, high-reflectivity white for LEDs, fast cycle time, hot-water moldable
Amodel® A-4122 LS WH678 22% glass fiber, high-reflectivity white for LEDs, fast cycle time, hot-water moldable, light stabilized
Amodel® A-4122 NL WH905 22% glass fiber, high-reflectivity white for LEDs, fast cycle time, hot-water moldable
Amodel® A-4422 LS WH118 22% mineral, high-reflectivity white for LEDs, fast cycle time, hot-water moldable, light stabilized
Flame Retardant Grades

Flame retardant grades have achieved a UL 94 V0 rating and are compatible with SMT processing techniques such as infrared reflow and vapor phase soldering.

Flame-Retardant Grades
Amodel® HFFR-4133 33% glass fiber, halogen-free, fast cycle time, hot-water moldable
Amodel® AFA-6133 V0 Z 33% glass fiber, flame retardant, high flow, hot-water moldable
Amodel® AFA-6145 V0 Z 45% glass fiber, flame retardant, high flow, hot-water moldable

 

UL Rating and Relative Thermal Index (RTI)
Grade Thickness, mm UL 94 Rating Relative Thermal Index Other Ratings
  Electrical Mechanical with Impact Mechanical without Impact HWI HAI
Amodel® HFFR-4133 0.40 V-0 140°C 65°C 65°C 4 2
  0.75 V-0 140°C 115°C 115°C 1 2
  1.00 V-0 140°C 115°C 115°C 1 2
  1.50 V-0, 5VA 140°C 120°C 120°C 0 1
  3.00 V-0, 5VA 140°C 125°C 125°C 0 1
Amodel® AFA-6133 VO Z O.30 V-0 105°C 65°C 65°C 0 1
  0.75 V-0 130°C 130°C 130°C 0 0
  1.50 V-0, 5VA 130°C 130°C 130°C 0 0
  3.00 V-0, 5VA 130°C 130°C 130°C 0 0
Amodel® AFA-6145 VO Z O.75 V-0 140°C   130°C 0 1
  1.50 V-0 140°C   130°C 0 1
  3.00 V-0 140°C 140°C 140°C 0 1

 

Electrically Friendly Grades

Outstanding electrical properties make Amodel® PPA ideal for use in connectors, switches and other applications requiring the material to act as an electrical insulator.

Electrically Friendly, Heat Stabilized Grades
Amodel® AE-4133 33% glass fiber, hot-water moldable, fast cycle times, heat stabilized
Amodel® AE-8930 30% glass fiber, best chemical resistance, lowest moisture absorption, heat stabilized
Amodel® AE-8935 35% glass fiber, best chemical resistance, lowest moisture absorption, heat stabilized
Amodel® AE-8950 50% glass fiber, best chemical resistance, lowest moisture absorption, heat stabilized

 

Electrical Properties*
Property Units Amodel® AE-1133 Amodel® AE-4133 Amodel® AE-8930 Amodel® AE-8930 Amodel® AE-8950 Test Method
Volume Resistivity ohms-cm 1E+16 5.6E+15 1E+16 1E+16 1E+16 ASTM D257
Dielectric Strength, 3.2 mm kV/mm 1E+16 21 19 18 21 ASTM D149
Dielectric Constant     26   26   ASTM D150
 60HZ   4.40 4.10 4.35 4.00    
 1 MHz   4.20 3.75 4.02 4.00    
Dissipation Factor             ASTM D150
 60HZ   0.005 0.006 0.007 0.020    
 1 MHz   0.017 0.015        
Arc Resistance sec 140         ASTM D495
Comparative Tracking Index (CTI) V 550 600 >600 >600 >600 UL 746
High Voltage Arc Tracking Rate (HVTR) mm/min   18       UL 746

 

* UL performance class ratings vary for each property; visit www.ul.com for definitions.

High Heat Resistant Grades
High Heat Resistant Grades
Amodel® A-4145 HH 45% glass fiber, high flow, hot-water moldable, continuous use 220°C to 270°C
Wear Resistant Grades
Wear Resistant Grades
Amodel® A-1130 FW 30% glass fiber, internally lubricated, wear resistance

Amodel® PPA Technical Data Sheets

What does Amodel® "PPA" mean?

PPA is the acronym for Polyphtalamide, a semi-crystalline polyamide with aromatic chemical building blocks which provide a unique combination of properties and advantages to the polymer range.

What is the typical color of Amodel® PPA NT grades?

The color of naturally colored Amodel® PPA grades can be described like milky white and depending on the amount and type of filler in the compound, it can vary from off-white to greenish white.

Why does my Amodel® NT part have a different color than it had one year age?

Amodel® parts will absorb moisture over time and depending on the amount it has absorbed, a natural colored NT grade can change in color to a more greenish shade. The color change is a reversible process though and after drying the part, it will return to its initial color under the assumption that the surface has not been oxidized due to the drying process.

Is it possible to color Amodel® PPA grades?

Naturally colored Amodel® PPA products can be colored by means of color masterbatches. Colorbatches with a PA66 carrier for example can be blended at the hopper of the molding machine to result into a colored molded part. It is important however to be aware that the molding process can be influenced by adding such masterbatches and that mechanical properties of the final part can be different than for the original PPA part. Also the color stability will depend on the carrier and pigments that are used in the masterbatch. Colorbatches with a PPA carrier are available on the market which result in a better compatibility with Amodel® PPA resins.

Why do Amodel® PPA grades require different mold temperatures ranging from 80°C up to 160°C – 176°F to 320°F ?

Amodel® PPA compounds are available with different base resins which are based on a different chemical molecule structure. This results into products with different properties, not only for their chemical resistance for example but also for the crystallization speed when transitioning from the molten to the solid phase. Faster crystallizing products don’t require this high mold temperature compared with slower crystallizing grades. The optimum mold temperature therefore depends on the part wall thickness but also on the product type.

Please read our Amodel® processing guide for further detailed information about molding Amodel® resins, and the technical data sheets for detailed information of each grade.

How can I dissolve a Amodel® PPA part?

PPA compounds can be dissolved in several solvents like m-Cresol or P-TCE (60/40 Phenol / 1,1,2,2 Tetra-Chlor-Ethane) which are described in the ISO 307 or ASTM D2857 or D5225 norms for determining solution viscosities of polymers. Due to the hazardousness of these solvents, also very strong acids like highly concentrated sulphuric acid or formic acid are frequently used for dissolving PPA resins.

How can I obtain Amodel® PPA resin pellet and molded samples for testing purposes?

Samples pellets for molding trials and several shapes of molded articles can be supplied for testing purposes. There is a wide range of products and sample types available. Stock shapes or other thick walled semi-fabricates for machining prototype parts for example, are not offered due to the complexity of the practical aspects to cool such parts fast enough and prevail the material from being degraded at the inner core of thick sections.

What is crucial for molding Amodel® PPA parts?

Molding Amodel® PPA parts requires a couple of basic preparations and equipment which are key to the quality of molded parts. Proper measures need to be taken related to drying the resin and keeping it dry before processing, as well as selecting a suitable size of the molding machine with respect to the shot volume and the total residence time of the polymer in the machine. A frequently underestimated aspect is the tool design and venting aspects, which should be big enough machined in order to obtain a long maintenance and cleaning interval of the tool.

Please read our Amodel® processing guide for further detailed information about molding Amodel® resins.

Why do I need to dry Amodel® PPA resins before processing?

Amodel® PPA resins need to be dried before they are processed. The Amodel® resins are processed at an elevated temperature which is close to its degradation limit and slight amounts of moisture at this high temperature, lead to a hydrolysis reaction (polymer chain scission) which results into a loss of mechanical properties. Besides the influence on the mechanical performance, it also has an effect on the generation of volatile components which sublimate onto the surface leading to mold & vent deposits in the tool.

Please read our Amodel® processing guide for further detailed information about molding Amodel® resins, and the technical data sheet for detailed information of each grade.

What can I do to reduce the mold deposits, if any, in my tool?

To avoid and reduce the formation of mold deposits in the tool and tool vents, it is recommended to sufficiently dry the resin according to the product recommendations and to apply sufficiently large and well-designed vents. Also the recommended melt temperature as indicated on the product datasheet should be taken into account.

Please read our Amodel® processing guide for further details on vent design and dimensions.

How and when should I purge the barrel and screw?

To avoid excessive degradation of Amodel® PPA resins, it is recommended to purge the screw and barrel of the molding machine if an interruption of several minutes occurs. For short interruptions or standstills of the molding machine, a purge of the screw is sufficient. For longer interruptions or material switchovers, a purging cycle with a cleaning agent is recommended.

Further details related to the purging procedures can be found in the Amodel® processing guide under the “Purging” section.

Are there any food or water contact approved Amodel® PPA grades?

Solvay Specialty Polymers has developed Amodel® compounds with fillers and additives that are suitable to match several food and water contact regulations.

For more information, consult the technical data sheets of DW and FC grades.

Is it possible to use Amodel® PPA with hot runner systems?

The use of high temperature engineering polymers in combination with hot runner systems requires some special attention with respect to the material residence time and thermal house holding of the hot runner system. It's best to consult one of our Specialty Polymers experts. 

Is there data existing for simulation software?

A series of Amodel® PPA grades are characterized to be able to make rheological and mechanical analyses of injection molded parts. Data is openly available in most of the commercial rheological software (Moldflow, Moldex, CADFlow...). Many Digimat data as well as stress-strain curves can be obtained.

Are Amodel ® PPA resins suitable for parts with undercuts and a forced ejection from the tool?

Solvay Specialty Polymers has a range of products which is particularly suited for such forced ejections from the tool. By taking specific design recommendations into account, it is possible to eject the part from the tool without a failure or complete deformation of the part, which is frequently required for automotive applications.