Ixef® PARA - FAQ

Frequently Asked Question

What is Ixef® PARA?

Ixef® is a semi-aromatic polyamide. It combines low moisture pickup, high fluidity, mechanical performance and high surface aspect.

Can Ixef® PARA be colored?

If the desired color doesn’t exist in commercial portfolio, a colored masterbatch with a PA66 carrier could be used.

Can you tell me if Ixef® PARA is compatible with a certain chemical?

Ixef® PARA is part of polyamide family. It has inherent chemical resistance.

IXEF® compounds display a good resistance to chemical reagents. However the amide function in the resin matrix makes them sensitive to certain chemicals.

It is very rapidly degraded by:

  • Powerful oxidants (03, Cl2, etc.)
  • Highly concentrated mineral acids (H2SO4, HNO3, etc.)

It is degraded at ambient temperature by:

  • Diluted mineral acids
  • Acetic acid and formic acid

It is degraded at high temperature by:

  • Strong bases (KOH, NaOH, etc.)
  • Most organic acids
  • Formaldehyde

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

The glass transition of Ixef® PARA is about 85°C. Temperature measured of the cavity tool has to be above 120°C to ensure having full crystallinity of polymer. Molding at lower temperature will not allow to have full crystallinity and by consequence the expected mechanical performances. Differential Scanning Calorimetry is used to determine the crystallinity level of molded article.

Is there some way to determine whether an Ixef® PARA part is crystalline or amorphous?

Differential Scanning Calorimetry is used to determine the crystallinity level of molded article. A endothermic peak around 85°C is an evidence of molding in a cavity tempered at a temperature below recommended processing temperature of 120°C. For more information or technical assistance, contact your Specialty Polymers Technical Marketing representative. 

Could injection processing affect Ixef® PARA properties?

Molding Ixef® PARA with recommended molding processing is not affecting mechanical performances. Too high melting temperature and/or too long residence time could affect performance.  IV, multi-shear viscosity and DSC measurement will help to determine the degradation level.

Is there some way to measure the polymer degradation?

IV, multi-shear viscosity and DSC measurement will help to determine the degradation level. For more information or technical assistance, contact your Specialty Polymers Technical Marketing representative. 

Do you have any FDA-approved grades?

Solvay has developed Ixef® PARA compounds with fillers and additives that are suitable to match FDA regulation.

  • Ixef® FC-1022 was developed to meet FDA but also EU food norms above year 2016
  • Ixef® FC-1022 is certified FDA for condition B to H and is EU 11/2011 certified

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

Ixef® PARA has inherent fairly good UV resistance. Solvay has developed Ixef® 1025 as dedicated compounds that have particular good long term UV performance.

Is it really necessary to use a mold temperature of 120°C (275°F)?

Glass transition of Ixef® is about 85°C. Temperature measured of the cavity tool has to be above 120°C to ensure having full crystallinity of polymer. Molding at lower temperature will not allow to have full crystallinity and by consequence the expected mechanical performances. Differential Scanning Calorimetry is used to determine the crystallinity level of molded article. 
 
For more information or technical assistance, contact your Specialty Polymers Technical Marketing representative. 

For right processing, what is the recommended moisture content level for Ixef® PARA?

Ixef® PARA compounds are delivered in granular form (bulk density around 0.7 g/cm3) usually in 25 kg bags or 1 ton octabins. Both package types are sealed and water-tight, so it is not necessary to dry the product before processing. If the packaging is left open in a humid atmosphere or if regrind is used, the product absorbs moisture at a rate which depends on the environmental conditions. 
 
If the water content of the granules exceeds 0.3 % (e.g. after 4 hours under the conditions mentioned above), it becomes necessary to dry the product.
 
One can use hot-air drying at 80 °C for 12 hours. Drying under vacuum is not only intrinsically more effective, but also makes it possible to work at higher temperatures. We recommend using a temperature of 120 °C. Under these conditions, for a layer of granules 3 cm thick and a reduced pressure of P = 2-3 mm Hg, the drying rate (see figure below).
 
Ixef-moisture-loss-vacuum-drying
 
For more information or technical assistance, contact your Specialty Polymers Technical Marketing representative. 

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

Most of Ixef® PARA grades are fully characterized to run FEA analysis. For more information or technical assistance, contact your Specialty Polymers Technical Marketing representative.

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

Most of Ixef® PARA grades are fully characterized to run FEA analysis. Please contact your Specialty Polymers Technical Marketing representative to help you for your application.

Is Ixef® PARA characterized for Digimat?

Most of Ixef® PARA grades are fully characterized to run FEA analysis. Please contact your Specialty Polymers Technical Marketing representative to help you for your application.

What types of adhesives are best for bonding Ixef® PARA?

The IXEF® compounds can be assembled by bonding without any difficulty. Four main types of adhesives have been evaluated for bonding IXEF® on IXEF® and IXEF® on steel:

Cyanoacrylates

  • Single Part Fast Curing Adhesives
  • Ideally suited for small part bonding
  • Toughened grades available
  • Optimum Gap Fill 0.15 mm
  • Maximum Temperature 80-110 °C (Depending on grade)

Two part Acrylics

  • Tough, and semi-flexible
  • Good adhesion to many substrates
  • Optimum Gap Fill 1 mm
  • Maximum temperature 100-120 °C (Depending on grade)

Modified Silane Adhesive/Sealants

  • Very flexible
  • Slow Cure
  • Excellent gap fill (3-4 mm)
  • Good Water resistance

Epoxies

  • Good shear and impact resistance
  • Optimum Gap Fill 2 mm
  • Maximum Temperature 100 °C