POLYOLEFIN MULTILAYER MICROPOROUS MEMBRANE AND BATTERY SEPARATOR

Title:

POLYOLEFIN MULTILAYER MICROPOROUS MEMBRANE AND BATTERY SEPARATOR

Document Type and Number:

WIPO Patent Application WO/2015/182689

Kind Code:

A1

Abstract:

　Provided are a polyolefin multilayer microporous membrane and a battery separator having exceptional mechanical strength and heat resistance. This polyolefin multilayer microporous membrane has at least three layers, including a first microporous layer (a surface layer) comprising a polyethylene resin that contains an ultra-high-molecular-weight polyethylene, and second microporous layer (an intermediate layer) comprising a polyolefin resin that contains a high-density polyethylene and polypropylene, (I) the piercing strength being 25 g/µm or greater, (II) the static coefficient of friction relative to aluminum foil being 0.40 or greater, and (III) the meltdown temperature being 180°C or greater.

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Inventors:

MIURA YUKIKO (JP)
MITSUOKA HIDETO (JP)
KUBOTA TAKASHI (JP)

Application Number:

PCT/JP2015/065348

Publication Date:

December 03, 2015

Filing Date:

May 28, 2015

Export Citation:

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Assignee:

TORAY BATTERY SEPARATOR FILM (JP)

International Classes:

B32B27/32; C08J9/00; C08L23/06; C08L23/12; H01M10/0525; H01M50/417; H01M50/457; H01M50/489; H01M50/491; H01M50/443; H01M50/494

Foreign References:

JP2013035293A	2013-02-21
JP2010245028A	2010-10-28
JP2011126275A	2011-06-30

Other References: