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    • 4. 发明专利
    • Separator material and its manufacturing method and battery
    • 空值
    • JP4372393B2
    • 2009-11-25
    • JP2002134535
    • 2002-05-09
    • ダイワボウホールディングス株式会社ダイワボウポリテック株式会社
    • 利夫 上笹博之 山本達宣 木田智文 田中延夫 青木
    • D06M11/00H01M2/16D04H1/4291D04H1/4382D06M11/55H01G9/02H01G11/52H01M10/30
    • Y02E60/13
    • PROBLEM TO BE SOLVED: To provide a separator material having high denseness, not obstructing the passage of an electrolyte or gas, having high short resistance, suppressing increase in internal resistance and internal pressure, and having long charge/ discharge cycle life, and provide the manufacturing method of the separator material. SOLUTION: This separator material is a nonwoven fabric containing divided type composite fibers composed of polyolefin resin having a plurality of different components. The divided type composite fibers are divided into very fine fibers 1 having a fineness of less than 0.5 dtex having a divided almost trapezoidal fiber cross section and a very fine fiber bundle 2 bundling the very fine fibers. This separator material makes water dispersed slurry with constituting fibers containing the divided type composite fibers, a wet type paper making web is prepared by dividing a part of the dividing type composite fibers, formed in a nonwoven fabric by drying, and the nonwoven fabric is pressed with a pair of rollers having a temperature higher than 40 deg.C and lower by 30 deg.C or more than a temperature at which constituting fibers are melted so as to have a thickness of 150 μm or less.
    • 要解决的问题:为了提供具有高密度,不妨碍电阻或气体通过的隔离材料,具有高短路阻力,抑制内部电阻和内部压力增加,并且具有长的充放电循环寿命,并提供 隔板材料的制造方法。 解决方案:该隔板材料是含有由具有多个不同成分的聚烯烃树脂构成的分割型复合纤维的无纺布。 分割型复合纤维分为纤维细度小于0.5分特的具有分割的几乎梯形的纤维横截面的非常细的纤维1和非常细的纤维束2,将非常细的纤维捆扎在一起。 该隔板材料通过将通过干燥在无纺布中形成的分割型复合纤维的一部分分割而制成含有分割型复合纤维的构成纤维的水分散浆料,湿式造纸纤维网,并将无纺布压制 具有温度高于40℃并且比构成纤维熔化的温度低至30℃或更高的一对辊以具有150μm或更小的厚度。