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发明公开
CN106992279A 非水电解液二次电池用间隔件、层叠间隔件、构件及非水电解液二次电池 有权

非水电解液二次电池用间隔件、层叠间隔件、构件及非水电解液二次电池
摘要：
本发明提供一种关闭温度及穿刺强度优异的非水电解液二次电池用间隔件，所述非水电解液二次电池用间隔件是以重量分子量为50万以上的聚烯烃为主成分的多孔膜，其MD方向的取向比例为58～80％，向MD方向的取向度为70～80％，向TD方向的取向度为65～85％，膜厚为14μm以下。
摘要（英）：

Provided is a nonaqueous electrolyte secondary battery separator having excellent shutdown temperature and puncture strength. The separator includes a porous film adopting, as a main component, polyolefin having a weight average molecular weight of not less than 500,000. The MD orientation ratio of the separator is 58% to 80%, a degree of MD orientation of the separator is 70% to 80%, and a degree of TD orientation of the separator is 65% to 85%, and the film thickness of the separator is not more than 14 [mu]m.

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