| 摘要 |
PURPOSE:To obtain the title film having a definite average pore size and porosity as well as each specific value in longitudinal strength, longitudinal Young's modulus, widthwise strength and widthwise elongation and useful as electrolytic separator, various kind of films and separating membrane. CONSTITUTION:For example, in the production of the title film by blending 100 pts.wt. polyolefin resin with 100-200 pts.wt. organic solid such as phthalic acid ester, the blend is molded so that average pore size porosity, longitudinal strength, longitudinal Young's modulus, widthwise strength and widthwise elongation of the film are each 0.05-5mum, 50-85%, >=4kg/mm<2>, >=20kg/mm<2>, <=3kg/mm<2> and >=100% to provide the aimed film. Furthermore, thickness of the film is preferably 10-50mum. |
