| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a porous membrane having not only high transmission performance but excellent membrane quality and spinning stability. SOLUTION: In the manufacturing process of porous hollow fiber membrane by a dry-wet spinning a membrane forming resin solution, the free running zone from the injection port of a nozzle to the surface of a coagulation bath is controlled so that product of the absolute humidity in the atmosphere of the zone and the running time is≥0.04 kg/m<SP>3</SP>s. By this method, a porous hollow fiber membrane having high transmission performance and excellent spinning stability and membrane quality can be easily obtained. COPYRIGHT: (C)2004,JPO
|
