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- Minimal expansion rate to 500°F (260°C)   - Maintains strength and stiffness to 500°F (260°C)
- Excellent wear resistance in bearing grades   - Able to endure harsh thermal, chemical and stress conditions

With its versatile performance capabilities and proven use in a broad range of applications, Torlon® polyamide-imide (PAI) shapes are offered in extruded, injection molded, and compression molded grades.
Duratron® PAI is the highest performing, melt processable plastic. Duratron® PAI has superior resistance to elevated temperatures. Duratron® PAI is capable of performing under severe stress conditions at continuous temperatures to 500°F (260°C). Parts machined from Duratron® PAI stock shapes provide greater compressive strength and higher impact resistance than most advanced engineering plastics.

Duratron® PAI's extremely low coefficient of linear thermal expansion and high creep resistance deliver excellent dimensional stability over its entire service range. Duratron® PAI is an amorphous material with a Tg (glass transition temperature) of 537°F (280°C). Duratron® PAI stock shapes are post-cured using procedures developed jointly by Solvay Advanced Polymers and Quadrant. This eliminates the need for additional curing by the end user in most situations. A post-curing cycle is sometimes recommended for components fabricated from extruded shapes where optimization of chemical resistance and/or wear performance is required.

For large shapes or custom geometries like tubular bar, compression molded Duratron® PAI shapes offer designers the greatest economy and flexibility. Another benefit of selecting Duratron® PAI molded grade is that resins are cured, or "imidized" prior to molding, which eliminates the need to post-cure shapes or parts fabricated from compression molded shapes.

Popular extrusion and injection molding grades of Duratron® PAI are offered as compression molded shapes.

For electrical or high strength applications
Duratron® PAI 4203/4203L (Extruded or Injection Molded) - Duratron® PAI 4203 polyamide-imide offers excellent compressive strength and the highest elongation of the Duratron® PAI grades. Duratron® PAI 4203 also provides electrical insulation and exceptional impact strength. Duratron® PAI 4203 is commonly used for electrical connectors and insulators due to its high dielectric strength. Duratron® PAI 4203's ability to carry high loads over a broad temperature range makes it ideal for structural components such as linkages and seal rings. Duratron® PAI 4203 is also an excellent choice for wear applications involving impact loading and abrasive wear.

For general purpose wear and friction parts
Duratron® PAI 4301 (Extruded or Injection Molded) - This Duratron® PAI is primarily used for wear and friction parts. Duratron® PAI 4301 offers a very low expansion rate, low coefficient of friction and exhibits little or no slip-stick in use. Duratron® PAI 4301's flexural modulus of 1,000,000 psi is higher than most other advanced engineering plastics. Duratron® PAI 4301 excels in severe service wear applications such as non-lubricated bearings, seals, bearing cages and reciprocating compressor parts.

Glass reinforced for improved load capacity
Duratron® PAI 4XG - (formerly Torlon 5030 PAI) is 30% glass-reinforced. It offers high rigidity, retention of stiffness, a low expansion rate and improved load carrying capabilities. It is well suited for applications in the electrical/electronic, business equipment, aircraft and aerospace industries.

Carbon reinforced for non-abrasive wear performance
Duratron® PAI 4XCF - (formerly Torlon® 7130 PAI) is 30% carbon fiber-reinforced. Duratron® PAI 4XCF offers exceptional stiffness, non-abrasive wear performance and the lowest coefficient of thermal expansion of all the materials profiled in this guide.

Proven applications include:

  • Chip nests and sockets
  • High temperature electrical connectors
  • Labyrinth seals for turbocompressors
  • Bearing cages
  • Can mandrels for aluminum can printing


As Duratron® PAI has a relatively high moisture absorption rate, parts used in high temperature service or made to tight tolerances should be kept dry prior to installation. Thermal shock resulting in deformation can occur if moisture laden parts are rapidly exposed to temperatures above 400°F (205°C).