MICROPOROUS HIGH DENSITY POLYETHYLENE FILM AND PREPARING METHOD THEREOF
    1.
    发明申请
    MICROPOROUS HIGH DENSITY POLYETHYLENE FILM AND PREPARING METHOD THEREOF 有权
    微孔高密度聚乙烯薄膜及其制备方法

    公开(公告)号:US20070218271A1

    公开(公告)日:2007-09-20

    申请号:US11752956

    申请日:2007-05-24

    摘要: The present invention discloses a microporous high-density polyethylene film for a battery separator, and process for preparing the same. The microporous high-density polyethylene film according to the present invention comprises of high-density polyethylene with weight average molecular weight of 2×105˜4×105, containing not more than 5 wt % of molecules with molecular weight of 1×104 or less and not more than 5 wt % of molecules with molecular weight of 1×106 or more, and has the properties of puncture strength of 0.22 N/μm or more, Darcy's permeability constant of 1.8×10−5 Darcy or more, and shrinkage of 4% or less in machine and transverse direction, respectively. Particularly, the microporous high-density polyethylene film has excellent extrusion-compoundability and stretchability with high productivity and enhances performances and stability of the battery using the film.

    摘要翻译: 本发明公开了一种用于电池隔膜的微孔高密度聚乙烯膜及其制备方法。 根据本发明的微孔高密度聚乙烯膜包含重均分子量为2×10 5〜4×10 5的高密度聚乙烯,其含有不超过5重量% %的分子量分子量为1×10 4以下且不超过5重量%的分子量为1×10 -6以上的分子,具有穿刺强度 为0.22 N / mum以上,达西渗透率常数为1.8×10 -5达西或以上,收缩率分别为机器横向和纵向方向的4%以下。 特别地,微孔高密度聚乙烯膜具有优异的挤出复合性和拉伸性,生产率高,并提高了使用该膜的电池的性能和稳定性。