| 摘要 |
PURPOSE:To produce the title molding excellent in opacity, lightness in wt., and surface uniformity at a high productivity by melt extruding a compsn. comprising a crystalline PP resin, a specific cyclopentadiene petroleum resin, and a nonionic surfactant, and stretching the product under specific conditions. CONSTITUTION:A compsn. obtd. by compounding a crystaline PP resin with 5-50wt.% cyclopentadiene petroleum resin having a softening point of 160-230 deg.C (e.g. a hydrogenated cyclopentadiene resin) and 0.05-3wt.% nonionic surfactant (e.g. stearyldiethanolamine monostearate) is melt molded at a temp. at least 10 deg.C higher than the softening point of the petroleum resin, and the product is stretched at a temp. not higher than the m.p. of the PP resin at least in one direction at least double. |
