SEMIPERMEABLE MEMBRANE AND PRODUCTION METHOD FOR SEMIPERMEABLE MEMBRANE

摘要

PROBLEM TO BE SOLVED: To obtain a semi-permeable membrane having a mesh-like constitutional structure without adding a pore opening agent. SOLUTION: Polysulfone resin (A) and polyether-sulfone resin (B) are dissolved in a ratio to obtain 0.25-4 mixing weight ratio (A/B), and a membrane body is formed in a coagulation liquid by using the obtained membrane-forming raw liquid.