Process for preparing porous film or sheet
    3.
    发明授权
    Process for preparing porous film or sheet 失效
    制备多孔薄膜或薄片的方法

    公开(公告)号:US4793956A

    公开(公告)日:1988-12-27

    申请号:US946074

    申请日:1986-12-24

    摘要: A process for preparing a porous film or sheet, which process comprises melt-forming a composition into a film or sheet and then stretching the thus-formed film or sheet at a temperature in the range of 30.degree. to 110.degree. C., said composition containing:(a) 30-90% by weight of a linear low-density polyethylene having a density not smaller than 0.910 g/cm.sup.3 and smaller than 0.940 g/cm.sup.3 ;(b) 10-70% by weight of an ethylene/.alpha.-olefin copolymer having a density not smaller than 0.860 g/cm.sup.3 and smaller than 0.910 g/cm.sup.3, a boiling n-hexane insolubles content not less than 10% by weight and a maximum peak temperature not lower than 100.degree. C. as measured according to a differential scanning calorimetry; and(c) 20-500 parts by weight of a filler based on 100 parts by weight of said resin components.

    摘要翻译: 一种制备多孔膜或片的方法,该方法包括将组合物熔融成膜或片,然后在30℃至110℃的温度范围内拉伸如此形成的膜或片,所述组合物 含有:(a)30-90重量%的密度不小于0.910g / cm 3且小于0.940g / cm 3的线性低密度聚乙烯; (b)10-70重量%的密度不小于0.860g / cm 3且小于0.910g / cm 3的乙烯/α-烯烃共聚物,沸点正己烷不溶物含量不小于10重量%,和 根据差示扫描量热法测定的最高峰值温度不低于100℃; 和(c)基于100重量份所述树脂组分20-500重量份的填料。