Bearing-Grade Thermoplastic Polyimides in Automotive Tribological Applications

The first easily injection moldable and recyclable polyimide components are experiencing fast growth within the automotive industry as ultra-high performance and cost-effective replacements for metals and conventional polyimides in high heat and demanding wear applications. Offering exceptional PV capability in lubricated and dry environments, low wear factors and coefficients of friction, high strength and toughness, and continuous operating performance at 550 °F, thermoplastic polyimide components (TPI) have entered critical applications such as transmission seal rings and thrust washers, engine and turbocharger bearings, and bearings and bushings for steering and suspension systems, electric motors, and HVAC. Unlike injection molded TPI, conventional polyimide components are non-recyclable and are limited to compression molding and sintering fabrication with inherent cost and performance drawbacks.