| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laminated porous film that has good air permeability, is excellent in strength and heat resistance, and can be suitably used as a separator for an electricity storage device.SOLUTION: The laminated porous film has an inorganic particle-containing layer on at least one side of a porous polyolefin film. When a value of storage elastic modulus at 25°C in the longitudinal direction of the film as determined by dynamic viscoelasticity measurement is represented as E'C, a value at 130°C is represented as E'C, and a value at 150°C is represented as E'C, the laminated porous film has E'Cof 1 GPa or more, a value of E'C/E'Cof 10 or less, and a value of E'C/E'Cof 20 or more. When a thermal shrinkage at 150°C as determined in the width direction of the film is represented as HC, the laminated porous film has HCof 5% or less.</p> |
