Polyamide-imide material performs well in nonlubricated applications.

A new material designed for nonlubricated applications reduces wear on moving parts. Polyamide-imide also provides a margin for continued operation of lubricated systems if lubrication is lost. Torlon 4435, designed by Solvay Advanced Polymers (Alpharetta, GA; 770/772-8200), exhibits wear resistance to both low-pressure and high-velocity conditions, and high-pressure and low-velocity conditions. Torlon's durability is due to its ability to maintain mechanical properties at high temperatures. The polyamide-imide material features a glass transition temperature that allows parts to operate at temperatures of up to 260ºC. The 4435 grade, a thermoplastic material, can be formed into a net shape by injection molding. Torlon is also available in grades applicable to moderate environments.