| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laminated porous film which has both air-permeability characteristics and heat resistance while having excellent slip properties and excellent pin extraction properties when used as a battery separator. <P>SOLUTION: In the laminated porous film having a heat-resistant layer includes a filler and a resin binder piled up on at least one surface of a polyolefin-based resin porous film, the surface of the heat-resistant layer has a static friction coefficient of ≤0.45, an air permeability is ≤2,000 sec/100 ml, and a tensile elastic modulus when stretched in the longitudinal direction at a stretching rate of 3% is 400-1,000 MPa. <P>COPYRIGHT: (C)2011,JPO&INPIT |
