| 摘要 |
<p>A porous film which is excellent in moisture permeability, flexibility, and oozing resistance; and a process in which a porous film having such properties can be produced through high-speed film formation and stretching. The porous film is formed from a composition comprising 25 to 55 wt.% polyolefin resin and 75 to 45 wt.% inorganic filler. It is characterized in that the polyolefin resin comprises 98 to 70 wt.% linear low-density polyethylene and 2 to 30 wt.% branched low-density polyethylene and further contains a liquid ethylene/a-olefin oligomer in an amount of 0.5 to 5 parts by weight per 100 parts by weight of the composition.</p> |
