POLYETHERIMIDE CONJUGATE HOLLOW FIBER MEMBRANE AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a polyetherimide conjugate hollow fiber membrane which has high moistening ability, is used effectively as a moistening membrane or a dehumidifying membrane and has excellent mechanical strength.

SOLUTION: A polyetherimide layer and an inorganic fiber-dispersed polyetherimide layer are made to conjugate with each other in this polyetherimide-conjugate hollow fiber membrane. This polyetherimide conjugate hollow fiber membrane is manufactured by discharging a polyetherimide film forming stock solution, an inorganic fiber-dispersed polyetherimide film forming stock solution and a polyvinyl pyrrolidone aqueous solution or water as a core liquid from a three-fold circular nozzle at the same time and spinning them into a fiber in a wet or dry system. A coagulation bath is filled with water or the polyvinyl pyrrolidone aqueous solution in combination with the core liquid to be used.

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