| 摘要 |
<p>An aromatic polysulfone resin hollow yarn membrane of 100 νm to 600 νm in membrane thickness having a five-layered structure of an outer surface layer, outer void layer, interlayer, inner void layer, and inner surface layer, with the thickness ratio of the inner void layer to the outer void layer being 1.5 to 0.6, the thickness of the interlayer being 5 νm to 70 νm, and the outer and inner surface layers being extremely thin. This hollow yarn membrane shows excellent heat resistance, acid and alkali resistance, chemical resistance, mechanical strenght, and high water permeability. This hollow yarn membrane with excellent performance can be manufactured by ejecting a polar organic solvent solution containing 15 to 35 wt % of an aromatic polysulfone resin and containing a glycol through a cyclic nozzle into the air in a hollow yarn form, with simultaneously pouring an inside-coagulating solution from the inside of the nozzle, then introducing the hollow yarn-shaped ejected product into a coagulating bath.</p> |
