公开(公告)号：EP4321241A1

公开(公告)日：2024-02-14

申请号：EP22784667.2

申请日：2022-04-04

申请人： NOK Corporation

发明人： ITO, Taiki ,  SANO, Hiroyuki

IPC分类号： B01D69/08 ,  B01D71/62 ,  B01D71/68 ,  D01F6/76

摘要： The present invention relates to a method for manufacturing a hollow fiber membrane wherein a spinning stock solution containing 10 mass% or more and 40 mass% or less of a polysulfone-based resin, 1 mass% or more and 30 mass% or less of polyvinylpyrrolidone, and 1 mass% or more and 80 mass% or less of N,N-dimethylformamide is discharged together with a core liquid from a double-ring nozzle to produce a hollow fiber membrane by dry-wet spinning, and then the hollow fiber membrane is subjected to a dry heat treatment at a temperature of 80°C or higher and 100°C or lower for 48 hours or longer and 168 hours or shorter.