Abstract: A multi-layer polyolefin porous membrane is disclosed. The membrane includes first and second layers, and a plurality of protrusions including polyolefin. The protrusions have a protrusion width (W) satisfying 5 ?m?W?50 ?m and have a protrusion height (H) satisfying 0.5 ?m?H. The protrusions are randomly disposed on a first side of the membrane, and the protrusions are disposed with a density of not less than 3 protrusions/cm2 and not greater than 200 protrusions/cm2. A meltdown temperature of the membrane is not lower than 165° C., an air permeation resistance of the membrane is not greater than 300 sec/100 cc Air, and a thickness of the membrane is not greater than 20 ?m.

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 ?m?W?50 ?m (W: projection size) and 0.5 ?m?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.

Abstract: Considering that the battery separator of embodiments of the present invention will have thinner materials and lower costs, provided are a polyolefin porous membrane with exceptionally high peel strength between the polyolefin porous membrane and a modified porous layer, suitable for high-speed processing during slit processing and the battery assembly process, and suitable for laminating on a modified porous layer, and a battery separator obtained by laminating a modified porous layer on the polyolefin porous membrane. A polyolefin porous membrane comprising protrusions of polyolefin having a size (W) within a range of 5 ?m?W?50 ?m and a height (H) within a range of 0.5 ?m?H and irregularly disposed on both sides of the polyolefin porous membrane in a density not less than 3/cm2 and not more than 200/cm2 per side, and the polyolefin porous membrane having a thickness of not more than 25 ?m.

Abstract: A polyolefin porous membrane disclosed. The membrane includes a plurality of protrusions of polyolefin having a size (W) of 5 ?m?W?50 ?m and a height (H) of 0.5 ?m?H. The protrusions are disposed on one side of the polyolefin porous membrane with a density of at least 3/cm2 and at most 200/cm2, and the polyolefin porous membrane has a thickness of at most 20 ?m. A battery separator including the membrane is also disclosed.

Abstract: A battery separator is disclosed. The battery separator includes a polyolefin porous membrane which has a plurality of protrusions including a polyolefin. The protrusions are interspersed randomly on at least one surface of the polyolefin porous membrane at a density of not less than 3 protrusions/cm2 and not greater than 200 protrusions/cm2. The protrusions have a size W, where 5 ?m?W?50 ?m, and the protrusions have a height H, where 0.5 ?m?H. The battery separator also includes a modified porous layer, including a fluorine-based resin, and a plurality of inorganic particles laminated on the at least one surface of the polyolefin porous membrane. A concentration of the inorganic particles is not less than 40 wt. % and is less than 80 wt. %.

Abstract: A multi-layer polyolefin porous membrane is disclosed. The membrane includes first and second layers, and a plurality of protrusions including polyolefin. The protrusions have a protrusion width (W) satisfying 5 ?m?W?50 ?m and have a protrusion height (H) satisfying 0.5 ?m?H. The protrusions are randomly disposed on a first side of the membrane, and the protrusions are disposed with a density of not less than 3 protrusions/cm2 and not greater than 200 protrusions/cm2. A meltdown temperature of the membrane is not lower than 165° C., an air permeation resistance of the membrane is not greater than 300 sec/100 cc Air, and a thickness of the membrane is not greater than 20 ?m.

Abstract: Considering that battery separators will require further thinner materials and lower costs in the future, a battery separator of the present invention, in which multi-layer polyolefin porous membrane with exceptionally high peel strength against a modified porous layer, suitable for high-speed processing during slit process and battery assembly process, and suitable for laminating on a multi-layer modified porous layer, and a multi-layer modified porous layer are laminated, is provided. A multi-layer polyolefin porous membrane comprising at least two or more layers, the multi-layer polyolefin porous membrane having a shut-down temperature in a range of 128 to 135° C., a rate of increase in air permeation resistance from 30° C. to 105° C. scaled to 20 ?m thickness less than 1.5 sec/100 cc Air/° C., and a thickness not more than 20 ?m.

Abstract: Considering that battery separators will require further thinner materials and lower costs in the future, a battery separator of the present invention, in which multi-layer polyolefin porous membrane with exceptionally high peel strength against a modified porous layer, suitable for high-speed processing during slit process and battery assembly process, and suitable for laminating on a multi-layer modified porous layer, and a multi-layer modified porous layer are laminated, is provided. A multi-layer polyolefin porous membrane comprising at least two or more layers, the multi-layer polyolefin porous membrane having a shut-down temperature in a range of 128 to 135° C., a rate of increase in air permeation resistance from 30° C. to 105° C. scaled to 20 ?m thickness less than 1.5 sec/100 cc Air/° C., and a thickness not more than 20 ?m.

Abstract: A battery separator is disclosed. The battery separator includes a polyolefin porous membrane which has a plurality of protrusions including a polyolefin. The protrusions are interspersed randomly on at least one surface of the polyolefin porous membrane at a density of not less than 3 protrusions/cm2 and not greater than 200 protrusions/cm2. The protrusions have a size W, where 5 ?m?W?50 ?m, and the protrusions have a height H, where 0.5 ?m?H. The battery separator also includes a modified porous layer, including a fluorine-based resin, and a plurality of inorganic particles laminated on the at least one surface of the polyolefin porous membrane. A concentration of the inorganic particles is not less than 40 wt. % and is less than 80 wt. %.

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 ?m?W?50 ?m (W: projection size) and 0.5 ?m?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.

Abstract: Considering that the battery separator of embodiments of the present invention will have thinner materials and lower costs, provided are a polyolefin porous membrane with exceptionally high peel strength between the polyolefin porous membrane and a modified porous layer, suitable for high-speed processing during slit processing and the battery assembly process, and suitable for laminating on a modified porous layer, and a battery separator obtained by laminating a modified porous layer on the polyolefin porous membrane. A polyolefin porous membrane comprising protrusions of polyolefin having a size (W) within a range of 5??m?W?50 ?m and a height (H) within a range of 0.5 ?m?H and irregularly disposed on both sides of the polyolefin porous membrane in a density not less than 3/cm2 and not more than 200/cm2 per side, and the polyolefin porous membrane having a thickness of not more than 25 ?m.

Abstract: A polyolefin porous membrane disclosed. The membrane includes a plurality of protrusions of polyolefin having a size (W) of 5 ?m?W?50 ?m and a height (H) of 0.5 ?m?H. The protrusions are disposed on one side of the polyolefin porous membrane with a density of at least 3/cm2 and at most 200/cm2, and the polyolefin porous membrane has a thickness of at most 20 ?m. A battery separator including the membrane is also disclosed.