Title:
METHOD FOR PREPARING MICROPOROUS POLYOLEFIN MEMBRANE AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2012/062011
Kind Code:
A1
Abstract:
Disclosed is a method for preparing microporous polyolefin membrane, which comprises the following steps: melt extruding polyolefin at 180-260℃ and casting into film to obtain casted polyolefin base membrane; stretching the casted polyolefin base membrane before performing thermoforming treatment, so as to obtain a preformed microporous polyolefin membrane; soaking the preformed microporous polyolefin membrane in the organic solvent which has a surface tension of lower than 30mN/m, and then removing the organic solvent to obtain the microporous polyolefin membrane. The application of the method for preparing microporous polyolefin membrane in preparing separators or lithium ion battery is also provided. In the method, after being stretched and thermoforming treated, the preformed microporous membrane is soaked in an organic solvent which has a surface tension of lower than 30mN/m to obtain the final microporous polyolefin membrane with round and bigger pores and evenly distributed gas permeability along the transverse direction of the microporous membran, so that the ventilation property of the microporous polyolefin membrane is improved.
Inventors:
CHEN XIUFENG (CN)
CHEN LIANG (CN)
LEI CAIHONG (CN)
GAO DONGBO (CN)
CHEN YONG (CN)
CHEN LIANG (CN)
LEI CAIHONG (CN)
GAO DONGBO (CN)
CHEN YONG (CN)
Application Number:
PCT/CN2010/080314
Publication Date:
May 18, 2012
Filing Date:
December 27, 2010
Export Citation:
Assignee:
SHENZHEN SENIOR TECHNOLOGY MATERIAL CO LTD (CN)
CHEN XIUFENG (CN)
CHEN LIANG (CN)
LEI CAIHONG (CN)
GAO DONGBO (CN)
CHEN YONG (CN)
CHEN XIUFENG (CN)
CHEN LIANG (CN)
LEI CAIHONG (CN)
GAO DONGBO (CN)
CHEN YONG (CN)
International Classes:
B29C55/02; B29C39/00; B29C48/92; B29C49/08; B29C69/02; B29C71/02; B29D7/01; H01M50/403; H01M50/406; H01M50/417; H01M50/489; H01M50/491
Foreign References:
| CN101695869A | 2010-04-21 | |||
| CN101724170A | 2010-06-09 | |||
| CN101291794A | 2008-10-22 | |||
| CN100388533C | 2008-05-14 |
Attorney, Agent or Firm:
SHENZHEN ZHONGYI PATENT AND TRADEMARK OFFICE (CN)
深圳中一专利商标事务所 (CN)
深圳中一专利商标事务所 (CN)
Download PDF:
Claims:
Previous Patent: DEVICE, SYSTEM AND METHOD FOR BATCH DATA STORAGE
Next Patent: MOTION SENSING DEVICE AND MOBILE TERMINAL
Next Patent: MOTION SENSING DEVICE AND MOBILE TERMINAL