Polytetrafluorethylene film (or PTFE film) is a polymer material with unique properties. Silicone Rubber: It is a kind of organic solid elastomer with excellent chemical stability, high temperature resistance, low temperature resistance, wear resistance and insulation as well as non-stickiness. It is widely used in electronics, chemical industry, aerospace food and other fields. It is almost free of corrosion by chemical substances, and has excellent resistance to strong acid, strong alkali, organic solvent, etc. It can still get high-performance and good chemical stability at elevated temperature. It is good flexible from low temp, does not get brittle. It has a very low surface friction coefficient and is very wear resistant.