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    Microporous polyolefin film with improved meltdown property and preparing method thereof
    6.
    发明申请
    Microporous polyolefin film with improved meltdown property and preparing method thereof 审中-公开
    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：US20070190303A1

    公开(公告)日：2007-08-16

    申请号：US11407631

    申请日：2006-04-20

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

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

    IPC: B32B3/26

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

    Abstract: 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 mold in 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, closing 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.

    Abstract translation: 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以下，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％稀释剂（组分III），以片状模塑; 拉伸上述片材以膜的形式模制; 从上述薄膜中提取稀释剂; 并对上述膜进行热定形。 它们的特征还在于具有大于0.14N / m 2的穿刺强度，达西渗透率常数大于1.5×10 -5达西，微孔膜的闭合温度低于140℃，以及 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，它们可以提高使用它们的电池的性能和稳定性以及微孔膜的生产率。

    Microporoous film of semicrystalline polymer and method for preparing the same
    8.
    发明申请
    Microporoous film of semicrystalline polymer and method for preparing the same 审中-公开
    半结晶聚合物微晶薄膜及其制备方法

    公开(公告)号：US20070138681A1

    公开(公告)日：2007-06-21

    申请号：US11406882

    申请日：2006-04-19

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

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

    IPC: B29C65/00

    CPC classification number: B29C55/005 ,  B01D53/228 ,  B01D67/0009 ,  B01D67/0027 ,  B01D69/02 ,  B01D71/26 ,  B01D2325/02 ,  B29K2023/065 ,  B29K2023/12 ,  B29K2105/04 ,  B29K2995/004 ,  C08J5/18 ,  C08J2323/04

    Abstract: Microporous films of the semicrystalline polymer resin according to the present invention are obtained by stretching semicrystalline polymer resin sheets extruded through a die by the phase separation between a semicrystalline polymer resin and a diluent, of which cross-section is comprised of a pore region and a non-crystalline region which is in the main matrix phase and is a swelling region swelled by the diluent, and extracting the diluent. The pore region has irregular sizes and shapes, has an average diameter of 0.01 (m to 2 (m, is connected in three dimensions, penetrates the thickness of the sheet, has gas permeability, has a volume ratio with respect to the volume of the entire resin composition of 10% to 40%. The swelled non-crystalline region has a swelling ratio of 200% or greater and is a region making minute cells of which average diameter is 0.01 (m to 1 (m as the region is split and cells are formed during the process of stretching. Thus manufactured microporous films are characterized by having a gas permeability of 1.3×10−5 Darcy or greater as well as *a puncture strength of 0.1 N/mm or greater even without tearing or breaking of the pores during the process of stretching.

    Abstract translation: 根据本发明的半结晶聚合物树脂的微孔膜是通过将半结晶聚合物树脂和稀释剂之间的相分离拉伸通过模头挤出的半结晶聚合物树脂片而获得的，其截面由孔区域和 处于主基质相中的非结晶区域，并且是由稀释剂膨胀的溶胀区域，并且萃取稀释剂。 孔区域具有不规则的尺寸和形状，平均直径为0.01（m至2（m，三维连接，穿透片材的厚度，具有透气性，相对于体积的体积比） 整个树脂组成为10％至40％，膨胀非结晶区域的膨胀比为200％以上，是平均直径为0.01（m〜1（m，区域分割， 在拉伸过程中形成细胞，因此制造的微多孔膜的特征在于具有1.3×10-5达西或更高的气体渗透性以及* 0.1N / mm以上的穿刺强度，即使没有撕裂或破裂孔 在拉伸过程中。

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