This standard specifies the classification, requirements, test methods, inspection rules, marking, Encasement, transportation and storage of polycarbonic acid ester films for electrical use. It is suitable for various types of polycarbonic acid ester films for electrical use, including general use, capacitor medium, etc. According to the use and characteristics, it is divided into general type and flame retardant type. The material is required to be made of bisphenol A type polycarbonic acid ester, and classified according to the flame retardant treatment of the mixture. The thickness of the film should be within a certain range, and the thickness deviation should be controlled within the range of plus or minus 10% of the nominal value.