公开(公告)号：US20210005860A1

公开(公告)日：2021-01-07

申请号：US16489496

申请日：2018-03-05

Applicant: TORAY INDUSTRIES, INC.

Inventor： Yanzi Chen ,  Toshihiko Kaneda ,  Naoya Nishimura

IPC: H01M2/16 ,  H01M10/0525

Abstract: A polyolefin microporous membrane has excellent self-discharge characteristics when the polyolefin microporous membrane is incorporated as a separator in a battery. The polyolefin microporous membrane has a membrane thickness change rate of 0% or more and 15% or less with respect to 100% of the membrane thickness of said polyolefin microporous membrane that has not heated nor compressed, wherein said membrane thickness change rate is obtained when said polyolefin microporous membrane is compressed under heat at a temperature of 80° C. at a pressure of 1 MPa for 60 minutes.

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

IPC: H01M4/02 ,  H01M2/16 ,  C08J9/28 ,  H01M2/14 ,  C08F10/02 ,  H01M10/00

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.

公开(公告)号：US20200020908A1

公开(公告)日：2020-01-16

申请号：US16490929

申请日：2018-03-05

Applicant: Toray Industries, Inc.

Inventor： Naoya Nishimura ,  Toshihiko Kaneda ,  Yanzi Chen

IPC: H01M2/16 ,  C08L23/06 ,  H01M2/14 ,  H01M10/0525

Abstract: A polyolefin microporous membrane has a haze value measured in accordance with JIS K 7136 being 90% or less and puncture strength of 1.96 N or more. A multilayer polyolefin microporous membrane includes at least one layer of the polyolefin microporous membrane. A stacked polyolefin microporous membrane includes the polyolefin microporous membrane and one or more coating layers on at least one surface of the polyolefin microporous membrane. A battery includes a separator containing the polyolefin microporous membrane.

公开(公告)号：US20200030754A1

公开(公告)日：2020-01-30

申请号：US16488176

申请日：2018-03-05

Applicant: Toray Industries, Inc.

Inventor： Takashi Kubota ,  Toshihiko Kaneda ,  Yanzi Chen

IPC: B01D71/26 ,  H01M2/16 ,  B01D67/00

Abstract: A polyolefin microporous membrane in which defects including scratches and pinholes can be stably detected, even when the membrane has a reduced thickness, has a light transmittance at a wavelength of 660 nm of 40% or less, and satisfies at least one of the following properties (1) and (2), wherein (1) the basis weight is 3.0 g/m2 or less, and (2) the membrane thickness is 4 μm or less.

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

IPC: B01D71/26 ,  C08J9/28 ,  H01M2/16 ,  C08F10/06 ,  H01M10/0525 ,  H01M2/14

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.