| 摘要 |
PROBLEM TO BE SOLVED: To provide a porous film suitable as a separator for power storage device having excellent safety.SOLUTION: In a porous film, a heat resistant multi-pore layer containing, as a main component, a heat resistant resin is laminated on a multi-pore film containing, as a main component, a polypropylene resin and having &bgr;-crystal forming ability. The peel strength at the interface between the multi-pore film and the heat resistant multi-pore layer is 50-300 g/25 mm. |
