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Patent Searching and Data


Title:
POLYOLEFIN MICROPOROUS FILM AND LAMINATED POLYOLEFIN MICROPOROUS FILM
Document Type and Number:
WIPO Patent Application WO/2022/154069
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a polyolefin microporous film that is suitable for use in a battery separator in which high energy density is required, that has exceptional shut down characteristics and melt down characteristics, and that has excellent impact resistance and cycle characteristics. The main idea of the present invention is a polyolefin microporous film that has a polyolefin as the main component and that is configured such that the area ratio of components having a molecular weight of 30,000 or less in a derivative molecular weight distribution curve obtained by gel permeation chromatography (GPC) is 10% or less, the area ratio of components having a molecular weight of 500,000-1,500,000 (inclusive) is 25% or more, and the Raman alignment ratio is less than 0.8.

Inventors:
NAKAJIMA KONOMI (JP)
CHEN YANZI (JP)
KANEKO KEI (JP)
Application Number:
PCT/JP2022/001026
Publication Date:
July 21, 2022
Filing Date:
January 14, 2022
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B29C44/06; B29C67/20; B32B5/32; B32B27/32; C08J9/00; H01M50/409; B29K23/00; B29K105/04; B29L7/00
Domestic Patent References:
WO2007132942A12007-11-22
WO2008026782A12008-03-06
WO2008026780A12008-03-06
Foreign References:
JP2008255306A2008-10-23
JP2020095950A2020-06-18
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