.High and low temperature resistance (long-term use temperature -269 ℃~300 ℃, short-term use temperature can reach 400 ℃) .Wear and tear resistance (under non lubricated conditions, the critical value of PV is more than 10 times that of general engineering plastics) .Heat resistant deformation (will not melt or soften under high temperature conditions, can withstand high loads) .High insulation (insulation strength higher than 20KV/mm) .Chemical resistance (resistant to lubricating oil and organic solvents) .Plasma resistant; .Resistant to cosmic rays; .Excellent machining performance;