| 摘要 |
PURPOSE:To obtain a porous sheet, having improved moldability and water resistance and suitable for simple clothing, etc., by molding a composition prepared by blending a polyolefin resin with a filler and silicone oil in a specific proportion into a sheetlike material and drawing the resultant sheetlike material. CONSTITUTION:A composition prepared by blending (A) 100pts.wt. polyolefin resin, preferably polypropylene or middle or low pressure processed polyethylene with (B) 50-400pts.wt., preferably 60-300pts.wt. filler, e.g. calcium carbonate, etc., and (C) 0.1-10pts.wt., preferably 1-5pts.wt. silicone oil, preferably polydimethylsilane or polymethylphenylsilane is molded into a sheetlike material, which is then drawn, preferably at a temperature 10 deg.C lower than the melting point of the polyolefin resin and 1.2-3.0 times draw ratio in at least one direction to afford the aimed porous sheet. |
