BIAXIALLY ORIENTED HYDROLYSIS-STABLE POLYESTER FILM COMPRISING EPOXIDIZED FATTY ACID DERIVATIVES, AND PROCESS FOR PRODUCTION THEREOF AND USE THEREOF

摘要

PURPOSE: A biaxially oriented hydrolysis-stable polyester film, a producing method thereof, and a use thereof are provided to use the film as a backside laminating plate for a ribbon cable and a solar module. CONSTITUTION: A biaxially oriented hydrolysis-stable polyester film contains 0.1~5wt% of epoxidized fatty acid ester hydrolysis stabilizer, and 0.2~10wt% of epoxidation fatty acid glyceride hydrolysis stabilizer. The average molecular weight of epoxidized fatty acid ester is 425 grams per mol. A producing method of the polyester film comprises the following steps: extruding a melted material corresponding the composition of the film using a flat die; forming an amorphous preliminary film by drawing off and solidifying the film; arranging the film biaxially while re-heating; and heat-molding and rolling the film.