Title:
MULTILAYER, MICROPOROUS POLYOLEFIN MEMBRANE, AND PRODUCTION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2014/192861
Kind Code:
A1
Abstract:
Provided is a microporous polyolefin membrane which has excellent oxidation resistance, electrolyte injection performance and shutdown characteristics, and which further has excellent permeability and strength balance. This multilayer, microporous polyolefin membrane is obtained by forming a gel-like sheet using a polyolefin resin that contains polypropylene, and by stretching said gel-like sheet in at least one direction and cleaning the same. The membrane has a first microporous layer containing polypropylene; at least one surface layer of the membrane is a first microporous layer, and the electrolyte injection performance is 20 seconds or less. The PP distribution in the first microporous layer is uniform in the in-plane direction, and the shutdown temperature is 132°C or less.
Inventors:
ISHIHARA TAKESHI (JP)
Application Number:
PCT/JP2014/064247
Publication Date:
December 04, 2014
Filing Date:
May 29, 2014
Export Citation:
Assignee:
TORAY BATTERY SEPARATOR FILM (JP)
International Classes:
B32B27/32; C08J9/26; H01M50/406; H01M50/449; H01M50/451; H01M50/457; H01M50/489; H01M50/491; H01M50/494
Domestic Patent References:
| WO2013054930A1 | 2013-04-18 | |||
| WO2007037289A1 | 2007-04-05 | |||
| WO2011152201A1 | 2011-12-08 |
Foreign References:
| JP2009518497A | 2009-05-07 | |||
| JP2007118588A | 2007-05-17 |
Attorney, Agent or Firm:
IWAMI, TOMONORI (JP)
Tomonori Iwami (JP)
Tomonori Iwami (JP)
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