Mylar film (MYLAR film) PET polyester film is by the dimethyl terephthalate and ethylene glycol in the relevant auxiliary heating the catalyst after the transesterification and polycondensation vacuum, from the film biaxial stretching. Mylar film with dimensional stability and excellent resistance to tearing straight strength, heat-cold, water resistant to moisture, resistant to chemical corrosion, and excellent insulation properties with superior electrical, mechanical, thermal, chemical resistance. Can be used for motors, capacitors, coils, cables, insulation materials, but also with the green shell into a composite insulation material of paper. Now widely used for electrical insulation industry, for electronics, home appliances, meters, displays, motor Slot, computer and peripheral equipment pads, file pieces, and the protective effect of the screen