PI films (polyimide casting film): The polyimide casting films of our company are produced by polymerizing and casting pyromellitic dianhydride (PDMA) and 4.4 - diaminodiphenyl ether (4.4 - ODA) to form the H-grade insulating film Features: 1) Good properties of insulation and tensile strength 2) Good temperature resistance and used in wide temperature ranges, between -60 ~+250癈 for a long period; between -269 ~ +400癈 for a short period without changing in tensile strength or insulating property 3) Good chemical stability and resistance to corrosion 4) Excellent flame retardant property 5) Good radio-resistance. After the film being irradiated with r ray of 109 remain its properties unchanged. 6) Can be commixed with many materials, when commixed with fluorine resin moisture protection and corrosion resistance are greatly improved Detailed Product Description Specifications: 1) Backing: polyimide film 2) Thickness: 1mil-10mil 3) Physical property: grade H insulation materials, with the characteristics of high temperature resistance, insulation, radiation resistance and fine dielectric and physical performance 4) Advantage: cover easily, peel easily, no vestige, and no pollution