PTFE film is used PTFE resin by moulding and sintering into blank, made by turning into the film is not directed film, not directed film made by the rolling direction and semi-directed film. It has good electrical PTFE-specific properties, non-sticky and low friction coefficient and other characteristies. PTFE film is for the use of high temperature, corrosive liquid used in motor as a generator of the insulation material, coil insulation material, a variety of machines into the mouth of the insulation material, etc..