BACK SHEET FOR SOLAR CELL HAVING AN EXCELLENT DURABILITY AND PREPARING PROCESS THEREOF

摘要

PURPOSE: A fluorine-applied back sheet for a solar cell is provided to stably maintain a fluorine resin layer in a long time use by improving adhesion of a fluorine resin and a polyester film through the introduction of a proper polymer intermediate layer. CONSTITUTION: A fluorine-applied back sheet for a solar cell includes: a polyester film forming a barrier layer for a solar cell back sheet; and a fluorinated resin layer coated on one side of the polyester film. An intermediate layer is formed by applying a polyester-based copolymer between the polyester film and the fluorine resin layer applied to one side of the polyester film. The polyester-based copolymer is a compound of chemical formula 1.