公开(公告)号：US4210709A

公开(公告)日：1980-07-01

申请号：US929983

申请日：1978-08-01

Applicant: Yoshinao Doi ,  Osamu Fugii ,  Shigeo Kaneko ,  Takeo Hanamura

Inventor： Yoshinao Doi ,  Osamu Fugii ,  Shigeo Kaneko ,  Takeo Hanamura

IPC: C08J9/28 ,  H01M2/16

CPC classification number: C08J9/28 ,  H01M2/1653 ,  C08J2201/0543 ,  C08J2201/0546 ,  C08J2323/02 ,  H01M2300/0005

Abstract: A microporous film which comprises a matrix comprising 40 to 90 volume percent of a polyolefin having a number average molecular weight of 15,000 or more and 10 to 60 volume percent of an inorganic filler, said matrix having therein void spaces at a rate of 30 to 75 volume percent based on the volume of the film; and 2 to 20 weight percent, based on the total weight of the polyolefin and the inorganic filler, of an organic substance which is substantially insoluble in and inert to sulfuric acid and has a solubility parameter ranging from 7.3 inclusive to 8.4 exclusive; said organic substance, in its majority, adhering to the overall surface of the film including the outer surfaces of the film and the surfaces of the polyolefin walls defining said void spaces in cooperation with said inorganic filler.

Abstract translation: 一种微孔膜，其包含基质，其包含40至90体积％的数均分子量为15,000以上且10至60体积％的无机填料的聚烯烃，所述基质具有30至75的空隙空间 体积百分比基于电影的数量; 和基于聚烯烃和无机填料的总重量的2至20重量％的基本上不溶于硫酸并且对硫酸具有惰性的有机物质，其溶解度参数范围为7.3以上8.4以下; 所述有机物质在大多数情况下，与所述无机填料配合，附着在膜的整个表面上，包括膜的外表面和限定所述空隙空间的聚烯烃壁的表面。