| 摘要 |
<p>PURPOSE:To obtain a drain polypropylene film containing no antiblocking agent, having projections having a specific size on the surface, free from difficult unwinding or twisting in winding on a roll or unwinding and having excellent transparency. CONSTITUTION:Polypropylene containing nucleus forming agent (preferably consisting of a polymer of branched olefin and alkenyl silane) is formed into sheet, which is then drawn in at least one direction at high temperature to provide the drawn polypropylene film containing no antiblocking agent and having projections (preferably of 25-200 numbers per mm<2>) having 0.05-0.50mu height and 10-100mu width on an at least the surface.</p> |
