| abstract |
Disclosed are a porous film having excellent chemical resistance, a high surface area porosity, and homogeneous micropores from the surface to the inside of the film, and a method for easily producing the porous film. [Solution] A porous film in which a porous film substrate is coated with a chemical-resistant polymer compound, wherein the porous film substrate is at least one polymer component selected from an amideimide polymer and an imide polymer A polymer solution containing a polymer is cast on a substrate in the form of a film and is produced by a predetermined phase change method, and there are a large number of micropores having connectivity, and the average pore size of the micropores is 0.01 to 10 μm. Provided is a porous film substrate which is a porous film substrate and has a chemical resistance having a number of fine pores having communication properties and a gas permeability of 0.2 to 29 seconds / 100 cc in terms of Gurley value. . [Selection figure] None |