公开(公告)号：AU2023353924A1

公开(公告)日：2025-04-10

申请号：AU2023353924

申请日：2023-09-25

Applicant: TORAY INDUSTRIES INC

Inventor： TACHIBANA TAKASHI ,  SHIMURA SHUN ,  HANAKAWA MASAYUKI ,  HANADA SHIGEHISA

IPC: B01D63/02 ,  B01D61/04 ,  B01D61/12 ,  B01D61/22 ,  B01D61/58 ,  B01D65/02 ,  B01D69/00 ,  B01D69/02 ,  B01D69/08 ,  B01D71/34 ,  C02F1/44

Abstract: With porous membranes in the related art, if the porous membrane is used with a filtration undiluted solution that is easily contaminated, membrane closure occurred due to turbidity separated by filtration and, as a result, membrane clogging occurred, and permeation performance readily deteriorated. The purpose of the present invention is to provide a porous membrane that has high permeability and excellent stain resistance, and is capable of maintaining high filtrate permeability with respect to a filtration undiluted solution that is easily contaminated. A porous membrane according to the present invention comprises polyvinylidene fluoride resin, and, given surface A as one surface thereof and surface B as the other surface thereof, has a ratio (H