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发明授权
US09461288B2 Separator film, its fabrication method, supercapacitor, battery and capacitor provided with said film 有权
分离膜，其制造方法，超级电容器，电池和电容器

Separator film, its fabrication method, supercapacitor, battery and capacitor provided with said film
摘要：
The invention relates to a separator film for a device used for storing electrical energy, the film being porous and oriented, and being obtained by stretching in a longitudinal direction and in a direction transverse to the longitudinal direction, the film containing a mixture comprising a polypropylene homopolymer, at least 10% of a copolymer obtained from monomers comprising at least propylene and ethylene, and at least one beta-nucleating agent. According to the invention, the ethylene content of the copolymer is ≧1% but
摘要（中）：

本发明涉及一种用于存储电能的装置的隔膜，该膜是多孔的并定向的，并且通过沿纵向方向和横向于纵向的方向拉伸获得，该膜含有包含聚丙烯 均聚物，至少10％由至少含有丙烯和乙烯的单体和至少一种β-成核剂得到的共聚物。 根据本发明，对于≥8微米和≤30微米的膜厚度，共聚物的乙烯含量为≥1％但<10％，共聚物的丙烯含量为≥90％，对应于根据 大于等于145％的IEC-60674-3-1标准，双轴拉伸膜的密度大于或等于0.18g / cm 3，但小于或等于0.41g / cm 3。

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