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US 10,256,450 B2Granted
Laminated porous membrane, process for manufacturing same and separator for battery
AssigneeToray Industries, Inc.
InventorsNaoki Mizuno, Koichi Matano, Ken Shimizu
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Abstract
A laminated porous membrane includes a polyolefin porous membrane, on one surface of which projections that are made of a polyolefin and satisfy 5 μm≤W≤50 μm (W: projection size) and 0.5 μm≤H (H: projection height) are irregularly scattered at a density of 3/cm2 to 200/cm2, and a modifying porous layer laminated on the surface of the polyolefin porous membrane having the projections, wherein the modifying porous layer includes a binder with a tensile strength of at least 5 N/mm2 and inorganic particles.
Claims6
A laminated porous membrane, comprising:
- a polyolefin porous membrane, on one surface of which projections that are made of a polyolefin and satisfy 5 μm≤W≤50 μm (W:
- projection size) and 0.5 μm≤H≤3.0 μm (H:
- projection height) are irregularly and without periodicity scattered at a density of 3/cm2 to 200/cm2, wherein the projections are not formed by embossing, and
- a modifying porous layer laminated on the surface of the polyolefin porous membrane having the projections, wherein the modifying porous layer comprises a binder with a tensile strength of at least 5 N/mm2 and inorganic particles.
1 more element
Dependencies are inferred from the claim text.