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US 2013/0280615 A1Published application
Porous membrane and process for preparing the same
AssigneeTokushu Tokai Paper Co., Ltd.
InventorsMasanori Imai, Satoshi Nemoto
Life of this patent
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Abstract
The present invention relates to a porous membrane containing cellulose fibers, wherein the cellulose fibers contain 5% by weight or more of cellulose fibers with a diameter of 1 μm or more, relative to the total weight of the cellulose, and the porous membrane has a tensile strength of 50 N·m/g or more, and/or has a tear strength of 0.40 kN/m or more. The porous membrane according to the present invention can provide a separator for electrochemical devices with superior properties, at a reasonable cost.
Claims15
A porous membrane comprising cellulose fibers, wherein
- the cellulose fibers comprise cellulose fibers with a diameter of 1 μm or more, in an amount of 5% by weight or more based on the total weight of the cellulose fibers, and
- the porous membrane has a tensile strength of 50 N·m/g or more, and/or has a tear strength of 0.40 kN/m or more.
Dependencies are inferred from the claim text.