PREPATATION METHOD FOR EXCELLENT PHOTOSTABLE EVA SHEET FOR SOLAR CELL ENCAPSULANT

摘要

PURPOSE: A manufacturing method of an EVA sheet for a solar cell encapsulating material with a superior light stability is provided to improve weatherability by adding a monomer having a functional group capable of simultaneously having an absorption function and a stabilization function of ultraviolet rays. CONSTITUTION: A sheet is formed by mixing a monomer, organic peroxides, a bridging making agent, and a silane coupling agent. The monomer has a functional group which simultaneously performs an absorption function and a stabilization function of ultraviolet rays on an ethylene vinyl acetate copolymer resin. The monomer has a benzophenone, a benzotriazole or a benzoben triazine structure. The content of vinyl acetate in an ethylene vinyl acetate copolymer resin is 25 weight%-32 weight%. A melt index of the ethylene vinyl acetate copolymer resin is 6-30g/10 minutes.