| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a steam permeable membrane having excellent gas permeability, not causing a water leak toward a gas side, also excellent in strength stability and effectively usable as a humidifying membrane for a fuel cell, in a porous hollow fiber membrane using a polysulfone resin. <P>SOLUTION: A spinning raw liquid comprising a water soluble organic solvent solution of a polyphenylsulfone resin or a polysulfone resin and a hydrophilic polyvinyl pyrrolidone is subjected to dry/wet spinning using water as a core liquid to manufacture the steam permeable membrane comprising a porous polyphenylsulfone or polysulfone hollow fiber membrane. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
