This document specifies the product classification, requirements, test methods, etc. of fluorine Plastic films (referred to as "fluorine films") for backplanes of photovoltaic modules. It is applicable to polyvinylidene fluoride (PVDF) films and polyvinyl fluoride (PVF) films for backplanes. Miscellaneous types such as ethylene-TFE copolymer (ETFE) films can be referred to accordingly. A number of standard documents are quoted, including Plastic film gas permeability, tensile performance, electric strength, combustion performance and other test methods. In addition, the document also mentions product classification, which is classified according to the different chemical composition of raw materials and product structure.