LAMINATED POROUS FILM, SEPARATOR FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a laminated porous film having good handling property to be used for a non-aqueous electrolyte secondary battery.SOLUTION: The laminated porous film has a layer containing a polymer other than a polyolefin, laminated on at least one surface of a polyolefin porous film. When the film is left to stand still in an environment of 23°C and 50% humidity for 1 hour, an uplift quantity of a side orthogonal to the machine direction of the film is 15 mm or less.