Patent ID: 8536443

Claim:
A back sheet for solar cell comprising a substrate and a fluoropolymer layer, wherein components of a fluoropolymer liquid coating composition formulation for preparing the fluoropolymer layer by weight consist of: Fluororesin 25~45 parts; Modified resin 1.5~3 parts; Polymeric filler 0.5~3 parts; Inorganic filler 0.1~1 part; Solvent 50~70 parts; wherein said modified resin is poly(vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene) resin modified by a carboxylic group, a sulfonic group, an azacyclopropane group, an isocyanate group, an epoxy group, an amino group, a hydroxyl group, or an active methylene group.