POLYESTER FILM FOR SOLAR CELL MODULE AND MANUFACTURING METHOD THEREOF

摘要

The present invention relates to a method for manufacturing a polyester film for a photovoltaic module back sheet, which is a new film replacing a conventional structure laminating a fluorine film, a PET film, and a fluorine film with the polyester film for all. The method for manufacturing the polyester film comprises the steps of: a) compounding a polyethylene terephthalate resin and a polyethylene naphthalate resin in a biaxial screw extruder, and manufacturing a compounding chip; b) solid state polymerizing the compounding chip; and c) melt-extruding and stretching the solid state polymerized compounding chip to manufacture a film.