Torlon PAI Torlon PAI Torlon PAI Torlon PAI

Duratron® PAI Index

Duratron® PAI was formerly known as Torlon® PAI

With its versatile performance capabilities and proven use in a broad range of applications, Duratron® PAI (polyamide-imide) shapes are offered in extruded, injection muolded, and compression moulded grades.

Duratron® PAI is the highest performing, melt processable plastic. It has superior resistance to elevated temperatures. It 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.


Video courtesy of the Quadrant group of companies.

Main properties of our range of Duratron® PAI sheet, rod and tube are:

  • Very high maximum allowable service temperature in air (250°C continuously)
  • Excellent retention of mechanical strength and stiffness over a wide temperature range
  • Extremely low coefficient of linear thermal expansion up to 250°C
  • Excellent wear & frictional behaviour (particularly Duratron® T4301 PAI)
  • Outstanding UV-resistance
  • Inherent low flammability
  • Exceptional resistance against high energy radiation (gamma and X-rays)

Torlon PAI Torlon PAI Torlon PAI
Grades can be used for injectionmolding Molding, Extrusion and Blow Molding Good electrical properties (4): AMECA approved grade available Food contact and pharmaceutical approved grades (5): Flame retardant high dimensional accuracy and stability (3):High-Temperature and Wear-Resistant PEEK Board Grades can be used for injection molding Molding, Extrusion and Blow Molding Good electrical High-Temperature and Wear-Resistant PEEK Board properties (4): AMECA approved grade available Food contact and pharmaceutical approved grades (5): Flame retardant





The following grades of Duratron® PAI are available to buy online - please select from:

Duratron® T4203 PAI

Duratron® T4203 PAI offers the best toughness and impact strength of all Duratron® PAI grades. Because of its intrinsic high temperature resistance, high dimensional stability and good machinability, Duratron® T4203 PAI is very popular for precision parts in high-tech equipment. In addition, its good electrical insulating ability provides numerous possibilities in the field of electrical components.

Available colours:
 Yellow-Ochre

Available to buy in:
 Sheet: 6.35mm to 25.4mm thick   Rod: 2.38mm to 50.8mm diameter

Duratron® T4503 PAI

Duratron® T4503 compression moulded material is similar in composition to Duratron® 4203 PAI, and is selected when larger shapes are required.

Available colours:
 Yellow-Ochre

Available to buy in:
 Rod: 57.15mm to 254mm diameter   Tube: on request

Duratron® T4301 PAI

The addition of PTFE and graphite provides higher wear resistance and lower coefficient of friction compared to the unfilled grade. Duratron® T4301 PAI also offers excellent dimensional stability over a wide temperature range. This grade excels in severe wear applications such as non-lubricated bearings, seals, bearings cages and reciprocating compressor parts.

Available colours:
 Black

Available to buy in:
 Sheet: 6.35mm to 25.4mm thick   Rod: 6.35mm to 50.8mm diameter

Duratron® T4501 PAI

This compression moulded material is similar in composition to Duratron® T4301 PAI, and is selected when larger shapes are required.

Available colours:
 Black

Available to buy in:
 Sheet: 9.53mm to 50.8mm thick   Rod: 60.33mm to 254mm diameter   Tube: on request

Duratron® T5530 PAI

This 30% glass fibre reinforced grade offers higher stiffness, strength and creep resistance than Duratron® 4203 PAI. It is well suited for structural applications supporting static loads for long periods of time at high temperatures. In addition, Duratron® T5530 PAI exhibits superb dimensional stability up to 250°C making it extremely popular for precision parts for example in the electrical and semiconductor industries.

Available colours:
 Khaki-Grey

Available to buy in:
 Sheet: 9.53mm to 50.8mm thick   Rod: 50.8mm to 254mm diameter   Tube: on request

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