公开(公告)号：US20130087500A1

公开(公告)日：2013-04-11

申请号：US13689880

申请日：2012-11-30

Applicant: FUJIFILM Corporation

Inventor： Kenichi ISHIZUKA ,  Nobuhiro NISHITA

IPC: B01D71/36 ,  B29C47/00

CPC classification number: B01D71/36 ,  B01D63/14 ,  B01D67/002 ,  B01D69/12 ,  B01D2325/02 ,  B01D2325/32 ,  B29C48/0011 ,  B29C48/03

Abstract: A crystalline polymer microporous membrane, which contains a laminate containing two or more layers and a plurality of pores piercing through the laminate in a thickness direction thereof, where the two or more layers include a layer containing a first crystalline polymer, and a layer containing a second crystalline polymer stacked to form the laminate, wherein the first crystalline polymer has a higher melting point than a melting point of the second crystalline polymer, wherein at least the layer containing the second crystalline polymer in the laminate has a microstructure containing at least fibrils having an average long axial length of 1 μm or shorter, and wherein at least one of the layers constituting the laminate has a plurality of pores whose average pore diameter is constant without any variation at least at part along a thickness direction of the laminate.

Abstract translation: 一种结晶聚合物微孔膜，其包含含有两层或多层的层压体和在其厚度方向上穿过层压体的多个孔，其中两层或更多层包括含有第一结晶聚合物的层，以及含有 层叠以形成层压体的第二结晶聚合物，其中所述第一结晶聚合物具有比所述第二结晶聚合物的熔点更高的熔点，其中所述层压体中至少含有所述第二结晶聚合物的层具有至少含有具有 平均长轴向长度为1μm以下，并且其中，构成层压体的层中的至少一层具有平均孔径恒定的多个孔，至少部分沿层叠体的厚度方向没有任何变化。