New and old plastic materials play an important pace making role for technological development. Due to their low weight, optimized sliding properties, high abrasion resistance, dimensional stability and chemical resistance, they are superior to conventional materials even at high application temperatures.
Nowadays, technical plastics have a major contribution to make towards improving existing solutions because modern materials offer a wide range of benefits:
Thermoplastic engineering plastics can be used permanently at temperatures between 100°C and 150°C. The materials demonstrate good mechanical properties, high dimensional stability and good chemical resistance.
(PA6) Good damping properties; Good impact strength and high toughness even at low temperatures; good abrasion resistance, particularly against sliding partners with rough surface.
(PA6-G) Cast polyamide with properties similar to PA6, production of high-volume parts with high wall thicknesses possible.
(PET) Low tendency to wear; High dimensional stability due to minimal thermal expansion; minimal moisture absorption; good dielectric properties; good chemical resistance.
(POM-C) Minimal moisture absorption; good reverse bending strength, dimensional stability and rigidity, parts with tight tolerances, good sliding friction properties.
(POM-H) Slightly higher mechanical values compared to POM-C, very good resilience and high level of surface hardness, very good sliding friction properties.
High-temperature plastics are plastics capable of being exposed to long-term service temperatures of over 150°C. Special reinforcing materials such as glass fibres, glass beads, carbon fibres or matrix fabrics are used to enhance thermal dimensional stability and rigidity.
Additives such as PTFE, graphite and aramid fibres considerably improve the sliding friction characteristics, while the addition of metal fibres and carbon black provide improved electrical conductivity.
The most important areas of application for high-temperature plastics: Sliding friction stressed mechanical components (sliding bearings, rollers, pressure discs, piston rings, seals), semi-conductor and electrical engineering industry.
(PI) For components exposed to high levels of thermal and mechanical stress. Good wear resistance up to 300°C in continuous operation. Dimensionally stable, electrically isolating, high purity, low outgassing. Inherently flame resistant.
(PEEK) Balanced characteristic profile; Low creep tendency, high modulus of elasticity. Excellent abrasion resistance. Inherently flame resistant. Operating temperature for long time 250°C.
(PTFE) Extremely good chemical resistance, long-term service temperature of 260°C. Excellent sliding properties and extremely good electrical properties. High level of toughness even at low temperatures. Inherently flame resistant.