PEI is almost as temperature-resistant as Teflon and can withstand continuous loads of up to 250°C. Thanks to its good mechanical properties and high lubricity, it is often used as a technical material for gear wheels or plain bearings in temperature-stressed environments. It has high dimensional stability, good mechanical strength, is extremely flame-retardant, low-smoke in the event of fire and achieves the highest flame-retardant rating according to all current standards.