Polyimide is one of the best heat-resistant polymers, but also has high mechanical properties and excellent people to, radiation-resistant properties such as wear resistance, since the advent of rapid development, widely used in aerospace, Electrical and electronic, locomotive, automotive, precision machinery and automatic office machinery and other fields. Typical applications include: ① mining, pharmaceutical and textile industry requirements of the oil-free roller shaft, bushings, bushings, etc .; ② automobile industry, close to the engine of the loop, exhaust pipe, brake pads, bearings, piston rings, timing gears, compressors, vacuum pumps and generator parts, fasteners, spline joints and electronic liaison; ③ power generation industry, the nuclear industry requirements of radiation-resistant structural parts; ④ electronic industry to do printed circuit boards, insulation materials, heat-resistant cables, Posts, sockets; ⑤ mechanical industry to do high temperature self-lubricating bearings, compressor blades and piston rings, seals, equipment heat shield, thrust washers, bushings, etc .; ⑥ light industry electrical appliances, precision machinery industry, such as photocopiers, printers, etc .; ⑦ in the aviation field can do engine combustion system parts, jet engine components, but also do car engine parts, aircraft foam insulation material (compared with polyurethane PU with flame retardant, non-toxic advantages). In general, all materials that require high temperature, heat oxidation, radiation resistance, corrosion resistance, self-lubricating or insulation (dielectric) performance, work in harsh environments parts, use this material.