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    Microporous polyolefin film with improved meltdown property and preparing method thereof
    46.
    发明申请
    Microporous polyolefin film with improved meltdown property and preparing method thereof 有权
    具有改善熔融性能的微孔聚烯烃薄膜及其制备方法

    公开(公告)号：US20070190304A1

    公开(公告)日：2007-08-16

    申请号：US11654450

    申请日：2007-01-17

    申请人： Young-Keun Lee ,  Jang-Weon Rhee ,  Gwi-Gwon Kang ,  In-Hwa Jung ,  Je-An Lee

    发明人： Young-Keun Lee ,  Jang-Weon Rhee ,  Gwi-Gwon Kang ,  In-Hwa Jung ,  Je-An Lee

    IPC分类号： B32B3/26

    CPC分类号： B29C55/005 ,  B29K2023/06 ,  B29K2023/12 ,  B29K2105/04 ,  C08J5/18 ,  C08J2323/06 ,  H01M2/1653 ,  Y10T428/249953

    摘要： The present invention is related to microporous polyolefin films that may be used for battery separators and the methods of manufacturing the same. These microporous polyolefin films are characterized by being manufactured in a method comprising the steps of melt-extruding a composition, comprised of 20-50 weight % of a resin composition, comprised of 90-98 weight % of polyethylene (Component I) having a weight average molecular weight of 2×105˜4×105 and less than 5 weight % of molecules of which molecular weight is less than 1×104 and less than 5 weight % of molecules of which molecular weight is greater than 1×106, and 2-10 weight % of polypropylene (Component II) of which weight average molecular weight is 3.0×104˜8.0×105 and the peak of the melting point is higher than 145° C., and 80-50 weight % of a diluent (Component III), to mold in the form of sheets; stretching the above sheets to the form of films; extracting the diluent from the above films; and heat-setting the above films. They are also characterized by having a puncture strength of greater than 0.14 N/μm, Darcy's permeability constant of greater than 1.5×10−5 Darcy, shut-down temperature of microporous films of lower than 140° C., and melt-down temperature of higher than 160° C. They can enhance the performance and stability of batteries using them as well as the productivity of microporous films owing to their high thermal stability and superior extrusion compoundability and physical properties.

    摘要翻译： 本发明涉及可用于电池隔板的微孔聚烯烃膜及其制造方法。 这些微孔聚烯烃膜的特征在于以下方法制造方法，该方法包括以下步骤：熔融挤出由20-50重量％的树脂组合物组成的组合物，该组合物由90-98重量％的具有重量的聚乙烯 分子量小于1×10 4的分子的平均分子量为2×10 5〜5×10 5〜5％，小于5重量％ 5重量％的分子量大于1×10 6的分子和2-10重量％的重均分子量为3.0×10 4的聚丙烯（组分II） >〜8.0×10 5，熔点高于145℃，80-50重量％的稀释剂（组分III），以片状成型; 将上述片材拉伸成薄膜形式; 从上述薄膜中提取稀释剂; 并对上述膜进行热定形。 它们的特征还在于穿刺强度大于0.14N / m，达西渗透率常数大于1.5×10 -5达西，微孔膜的停机温度低于140℃。 ，并且熔化温度高于160℃。由于其高热稳定性和优异的挤出复合性和物理性能，它们可以增强使用它们的电池的性能和稳定性以及微孔膜的生产率。

    Microporous high density polyethylene film and preparing method thereof
    49.
    发明申请
    Microporous high density polyethylene film and preparing method thereof 审中-公开
    微孔高密度聚乙烯薄膜及其制备方法

    公开(公告)号：US20070052130A1

    公开(公告)日：2007-03-08

    申请号：US10544970

    申请日：2005-06-18

    申请人： Young-Keun Lee ,  Jang-Weon Rhee ,  Jung-Moon Sung

    发明人： Young-Keun Lee ,  Jang-Weon Rhee ,  Jung-Moon Sung

    IPC分类号： B29C71/00 ,  D01D5/12

    CPC分类号： C08J5/18 ,  C08J2323/04 ,  H01M2/1653 ,  Y10T428/249953 ,  Y10T428/249958 ,  Y10T428/249978 ,  Y10T428/249992 ,  Y10T428/249993

    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。