| 摘要 |
PURPOSE:To obtain the subject film free from cloud appearance and optical unevenness and having excellent transparency, by providing a polypropylene resin containing a small amount of an olefin polymer branched at 4-site and drawing the resin in at least one direction. CONSTITUTION:The objective drawn polypropylene film having excellent transparent can be produced by drawing a polypropylene resin containing 0.1ppm-2 wt.% of an olefin polymer branched at 4-site (preferably 4,4-dimethylpentene-1 polymer and/or 4,4-dimethylhexene-1 polymer) in at least one direction. The objective propylene film is preferably produced by blending a polypropylene with a 4-branched olefin polymer produced by the polymerization of a 4- branched olefin using a Ziegler-Natta catalyst. |
