| abstract |
A separation membrane having sufficient alkali resistance, chlorine resistance and heat resistance is provided. By using a non-woven fabric made of polyphenylene sulfide fiber as a base material, and a separation film formed by integrally forming a polysulfone resin composition as a separation layer on the base material, sufficient alkali resistance, chlorine resistance and Heat resistance can be imparted and the separation layer can be prevented from peeling off from the base material layer, the durability of the separation membrane is improved, and long-term operation is facilitated. [Selection figure] None |