| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polybutylene terephthalate film which can be suitably used for a battery outer packaging, especially for a lithium ion secondary battery having a (solid or liquid) electrolyte. <P>SOLUTION: The polybutylene terephthalate film shows film piercing displacement of 3-8 mm at 25°C, and has film thickness of 10-40 μm. <P>COPYRIGHT: (C)2012,JPO&INPIT |
