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公开(公告)号：US10686175B2
公开(公告)日：2020-06-16
申请号：US15539084
申请日：2015-12-25
Applicant: TORAY INDUSTRIES, INC.
Inventor： Toshihiko Kaneda , Go Sato , Koichi Kono
Abstract: A polyolefin microporous membrane is disclosed. The membrane includes a polyolefin resin having an MFR value of not greater than 2.0 g/10 min, and a crystal nucleating agent. The polyolefin microporous membrane has an air permeation resistance scaled to a thickness of 20 μm of from 100 to 500 sec/100 cc, a porosity of from 20% to 60%, and a mean flow pore size of not greater than 100 nm.
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公开(公告)号：US20200006735A1
公开(公告)日：2020-01-02
申请号：US16489844
申请日：2018-03-15
Applicant: Toray Industries, Inc.
Inventor： Atsumichi Kawashima , Go Sato , Chunyao Li , Haruka Shimokawatoko
IPC: H01M2/16 , H01M2/14 , H01M10/0525 , B01D71/26
Abstract: To achieve an enhanced safety of a lithium ion battery while increasing the energy density and output of the battery, it is important to allow a separator to have a smaller maximum pore size, a higher pin puncture strength and a lower melt-heat shrinkage in the transverse direction. A polyolefin microporous membrane has a pin puncture strength per 20 μm of membrane thickness of 4.5 N or more, and contains a polyolefin, wherein the polyolefin has such a molecular weight distribution that the ratio of the polyolefin having a molecular weight of 5.0×106 or more is 0.6 to 1.5%.
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公开(公告)号：US10507436B2
公开(公告)日：2019-12-17
申请号：US15539972
申请日：2015-12-25
Applicant: TORAY INDUSTRIES, INC.
Inventor： Go Sato , Toshihiko Kaneda , Koichi Kono
Abstract: A polyolefin microporous membrane is disclosed. The polyolefin microporous membrane includes a polyolefin resin, where the polyolefin resin contains at least 80 mass % polypropylene resin, and where the polyolefin microporous membrane has a maximum pore size of less than 30.0 nm and a mean flow pore size of less than 20.0 nm.
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