Get the Best of Both Worlds

Torlon® PAI is a family of polyamide-imides that combines the exceptional performance of thermoset polyimides with the melt-processing advantage of thermoplastics.  

PAI exhibits greater compressive strength and higher impact resistance than most advanced engineering plastics. High creep resistance and an extremely low coefficient of linear thermal expansion (CLTE) provide excellent dimensional stability. Parts made of Torlon® PAI perform under conditions generally considered too severe for other thermoplastics.

Wear-resistance grades of Torlon® PAI offer unsurpassed performance in both dry and lubricated environments. High-strength grades retain their toughness, high strength and high stiffness up to 275°C (525°F), making PAI the industry's highest performing thermoplastic. Its broad chemical resistance includes strong acids and most organics.

Comparison of Torlon® PAI grades



High-Temperature Wear Resistance

Wear-resistant grades Torlon® PAI offers and excellent combination of mechanical and tribological properties. This combines with excellent chemical resistance and high thermal stability to successfully replace metal in high-temperature friction and wear applications, even when lubrication is marginal or non-existent. Specially formulated grades can perform in lubricated environments at exceptionally high pressures and velocities (PV).




Torlon® 4275 grooved test specimen after 100 hours

Wear properties are enhanced by adding carbon fiber and polymeric lubricants such as PTFE. Torlon® PAI offers the best high-temperature wear resistance.

Torsional DMA of wear-resistant Spire® Ultra Polymers



Comparison of friction and wear grades