| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a porous polypropylene film having excellent heat-resistance and foreign matter resistance. <P>SOLUTION: The porous polypropylene film contains a polypropylene resin and a β-crystal nucleation agent and has a 5% shrinkage temperature of ≥145°C in longitudinal direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
