| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a polypropylene-based microporous film having air permeability and high uniformity of pores, and useful as a separator for a battery, an electrolytic capacitor or the like, and to provide a polypropylene-based resin composition capable of providing the polypropylene-based microporous film and excellent in drawing processability, and a sheet of the resin composition.SOLUTION: There is provided a polypropylene-based resin composition comprising 99 to 70 pts.wt. of a propylene-based polymer (A) having a weight average molecular weight Aw of 7000 to 14000, 1 to 30 pts.wt. of a propylene-based polymer (B) having a weight average molecular weight Aw of 100 to 5000, and 0.05 to 2 pts.wt. of aβ-crystal nucleating agent.</p> |
