Title:
COMPOSITE POROUS MEMBRANE AND PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/037785
Kind Code:
A1
Abstract:
Provided in the present invention are a composite porous membrane and a preparation method therefor and a use thereof, the composite porous membrane comprising at least one porous base layer and at least one uniaxially stretching coating layer located on at least one side surface of the porous base layer. Specifically, the composite porous membrane comprises at least one porous base layer and at least one nanofiber-like non-polyolefin polymer porous layer that is oriented along the transversely stretching direction of the composite porous membrane and located on one or two side surfaces of the porous base layer, or the composite porous membrane comprises a bidirectionally stretching polypropylene porous base layer and a unidirectionally stretching coating layer located on at least one side surface of the porous base layer. According to the preparation method, the composite porous membrane is prepared by introducing a coating liquid prior to transverse stretching, and the nanofiber-like non-polyolefin polymer porous layer that is oriented along the transverse stretching direction of the composite porous membrane may inhibit the longitudinal cracking of the composite porous membrane during use, and thus improve the performance during use of the composite porous membrane.
Inventors:
ZHOU JIANJUN (CN)
LI LIN (CN)
HU ZHIYU (CN)
LI LIN (CN)
HU ZHIYU (CN)
Application Number:
PCT/CN2018/102316
Publication Date:
February 28, 2019
Filing Date:
August 24, 2018
Export Citation:
Assignee:
UNIV BEIJING NORMAL (CN)
International Classes:
C08J5/18; C08J7/043; H01M50/443; H01M50/489; H01M50/491; H01M50/474
Foreign References:
| CN103724646A | 2014-04-16 | |||
| CN101245150A | 2008-08-20 | |||
| CN203779820U | 2014-08-20 | |||
| US20150162588A1 | 2015-06-11 | |||
| CN105826508A | 2016-08-03 | |||
| CN201710744074A | 2017-08-25 | |||
| CN201810302163A | 2018-04-04 | |||
| CN1062357A | 1992-07-01 |
Other References:
VARGA J.: "Journal of Macromolecular Science: Physics", vol. 41, 2002, pages: 1121
See also references of EP 3674354A4
See also references of EP 3674354A4
Attorney, Agent or Firm:
BEIJING ORIGINTELLIGENCE IP LAW FIRM (CN)
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