Title:
POROUS LAMINATE FILM, SEPARATOR FOR ELECTRICITY STORAGE DEVICE, AND ELECTRICITY STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/099149
Kind Code:
A1
Abstract:
Provided are a porous laminate film, which has high gas permeability, flatness and heat resistance, achieves a balance between the excellent workability and battery performance and the safety at a high level, and is suitable for a separator for an electricity storage device; and a separator for said electricity storage device. The porous laminate film comprises a polyolefin porous film and a porous layer laminated on at least one main surface of the polyolefin porous film, wherein the porous layer contains binder and heat-resistant particles having the aspect ratio of 1.5 to 10, and the time variant Ps as defined by formula (1) is 1.0 to 1.4 in terms of its cross-sectional shape perpendicular to the major axis, wherein Ps = Rl/Rs … (1), Rl is the radius of minimum circumscribed circle, and Rs is the radius of the maximum inscribed circle.
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Inventors:
WAKAHARA, Yoko (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
若原 葉子 (〒58 滋賀県大津市園山１丁目１番１号 東レ株式会社 滋賀事業場内 Shiga, 〒5208558, JP)
ISHIDA, Yasuyuki (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
石田 康之 (〒58 滋賀県大津市園山１丁目１番１号 東レ株式会社 滋賀事業場内 Shiga, 〒5208558, JP)
若原 葉子 (〒58 滋賀県大津市園山１丁目１番１号 東レ株式会社 滋賀事業場内 Shiga, 〒5208558, JP)
ISHIDA, Yasuyuki (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
石田 康之 (〒58 滋賀県大津市園山１丁目１番１号 東レ株式会社 滋賀事業場内 Shiga, 〒5208558, JP)
Application Number:
JP2012/050925
Publication Date:
July 26, 2012
Filing Date:
January 18, 2012
Export Citation:
Assignee:
TORAY INDUSTRIES, INC. (1-1 Nihonbashi-Muromachi 2-chome, Chuo-ku Tokyo, 66, 〒1038666, JP)
東レ株式会社 (〒66 東京都中央区日本橋室町２丁目１番１号 Tokyo, 〒1038666, JP)
WAKAHARA, Yoko (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
若原 葉子 (〒58 滋賀県大津市園山１丁目１番１号 東レ株式会社 滋賀事業場内 Shiga, 〒5208558, JP)
ISHIDA, Yasuyuki (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
東レ株式会社 (〒66 東京都中央区日本橋室町２丁目１番１号 Tokyo, 〒1038666, JP)
WAKAHARA, Yoko (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
若原 葉子 (〒58 滋賀県大津市園山１丁目１番１号 東レ株式会社 滋賀事業場内 Shiga, 〒5208558, JP)
ISHIDA, Yasuyuki (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
International Classes:
B32B27/14; B32B5/22; B32B27/32; C08J7/04; C08J9/00; H01M2/16
Attorney, Agent or Firm:
SAKAI, Hiroaki et al. (Sakai International Patent Office, Kasumigaseki Building,,2-5, Kasumigaseki 3-chome,,Chiyoda-k, Tokyo 20, 〒1006020, JP)
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Claims: