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Title:
POLYOLEFIN COMPOSITE POROUS FILM, METHOD FOR PRODUCING SAME, BATTERY SEPARATOR, AND BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/093184
Kind Code:
A1
Abstract:
Provided is a polyolefin composite porous film that makes it possible to improve impact resistance in addition to improving battery characteristics such as external short circuit resistance and high-temperature heat resistance in recent battery designs having high energy density. The polyolefin composite porous film comprises: a first layer containing polypropylene (A), a first high-density polyethylene (B) having a melting point of 130°C or more, and a second high-density polyethylene (C) having a melting point of 120°C or more and less than 130°C; and a second layer containing polyethylene (D). The first layer and the second layer are laminated together in an integrated manner.

Inventors:
NAKAJIMA Konomi (Toray Industries Inc., 1190-13, Iguchi, Nasushiobara-sh, Tochigi 63, 〒3292763, JP)
HARUMOTO Kosuke (Toray Industries Inc., 1190-13, Iguchi, Nasushiobara-sh, Tochigi 63, 〒3292763, JP)
MATSUSHITA Katsuhiko (Toray Industries Inc., 1190-13, Iguchi, Nasushiobara-sh, Tochigi 63, 〒3292763, JP)
LI Dan (Toray Industries Inc., 1190-13, Iguchi, Nasushiobara-sh, Tochigi 63, 〒3292763, JP)
Application Number:
JP2018/040199
Publication Date:
May 16, 2019
Filing Date:
October 29, 2018
Export Citation:
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Assignee:
TORAY INDUSTRIES, INC. (1-1 Nihonbashi-Muromachi 2-chome, Chuo-ku Tokyo, 66, 〒1038666, JP)
International Classes:
B32B27/32; B32B5/18; C08J9/26; H01M2/16
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (Toranomon East Bldg. 10F, 7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, 〒1050003, JP)
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