| 摘要 |
PROBLEM TO BE SOLVED: To provide a porous film which causes no defects even when it is wound up at a high speed, and a process for producing the same. SOLUTION: The porous film comprises 100 pts.wt. of a resin comprising 20-98 wt.% of an ethylene/α-olefin copolymer which has an MI of 0.5-10 g/10 min. and a density of 0.905-0.945 g/cm3 and is produced by using a metallocene catalyst, 1-79 wt.% of an ethylene/α-olefin copolymer which has an MI of 0.5-10 g/10 min. and a density of 0.905-0.945 g/cm3 and is produced by using a Ziegler catalyst and 1-8 wt.% of a branched low-density polyethylene which has an MI of 0.1-10 g/10 min. and a density of 0.91-0.935 g/cm3, and 50-500 pts.wt. of an inorganic filler, and has a melt tension of 0.5-4 g and a melt ductility (elongation) of at least 800%.
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