| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminate film which is excellent in hydrolysis resistance and moldability and minimizes reduction of film strength due to lapse of time when used for lithium battery exterior.SOLUTION: A laminate film for battery exterior is characterized in being formed by laminating a polyester film having the amount of terminal carboxyl group of 26 equivalent/ton or less, the intrinsic viscosity (IV) of 0.65 dl/g or more, the plane orientation degree (&Dgr;P) of 0.140 to 0.162, and the thickness of 6 to 50 μm on one surface of a metal foil. |
