| abstract |
To provide a porous polypropylene film, a laminated porous film, and an electrical storage device, which are excellent in organic solvent resistance and air permeability, and exhibit little change in physical properties when a functional layer such as a heat-resistant layer is coated. The porous polypropylene film is a porous polypropylene film containing a polypropylene resin having β-crystal forming ability, characterized in that the air permeability is 1000 seconds/100ml or less, and the thickness change rate before and after acetone immersion treatment is 20% or less. |