| abstract |
PROBLEM TO BE SOLVED: To produce a porous body capable of producing a porous body having high liquid permeability and high mechanical strength even when producing a porous body in which two or more porous layers are laminated. I will provide a. A method for producing a porous body having a first porous layer and a second porous layer on the first porous layer, comprising: The volume ratio of the one resin to the second resin is 1: 1 to 200: 1, and the heating temperature in the step of performing the first heat treatment is equal to or higher than the softening point of the first resin, The heating temperature in the step of applying the second heating and pressure treatment is equal to or higher than the softening point of the second resin, and is lower than the softening point of the first resin, the method for producing a porous body. .. [Selection diagram] |