| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated porous film that has excellent air permeability, interfacial adhesion, and productivity, and exhibits excellent properties when used as a separator for nonaqueous electrolyte secondary battery.SOLUTION: A laminated porous film has, on at least one face of a polyolefin resin porous layer, a porous coating layer comprising an electrolyte swellable organic polymer (a), and the polyolefin resin porous layer is drawn in biaxial direction and the coating layer is drawn in uniaxial direction. |
