| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated polyester film excellent in hydrolysis resistance of a base material film, excellent in thermocompression bonding property to a sealing material containing an α-olefin based resin, and favorably usable as, for example, a film for solar cell rear face protective material.SOLUTION: A laminated polyester film has an application layer formed from an application liquid containing a graft copolymer that polyester is bonded to a propylene α-olefin copolymer, and one or more kinds of crosslinking agents at least on one surface of a biaxially oriented polyester film of not more than 26 equivalent/tons in terminal carboxylic content and at least 0.65 dl/g in limiting viscosity. The application layer is extended at least in one direction and heat-set. |
