| 摘要 |
PROBLEM TO BE SOLVED: To easily provide a hollow shape and at the same time, dispense with the cleaning of a hollow fiber membrane by discharging a water-soluble organic liquid which is non-miscible with a tertiary amine oxide of a composition for manufacturing a membrane from an inner pipe, when the composition for manufacturing a membrane is discharged from a space between the inner pipe and the outer pipe of a double pipe-shaped nozzle to form the hollow fiber membrane. SOLUTION: When a composition for manufacturing a membrane of cellulose using a tertiary amine oxide is discharged from a space between the inner pipe and the outer pipe of a double pipe-shaped nozzle, and the cellulose is regenerated to form a hollow fiber membrane, a water-soluble organic liquid which is non-miscible with the tertiary amine oxide of the composition for manufacturing a membrane, is discharged from the inner pipe to form the hollow fiber membrane in a hollow shape. In this case, the tertiary amine oxide to be used is an N-methylmorpholine -N-oxide. The organic liquid to be used is the tertiary amine. Further, the hollow fiber membrane is characterized in that the dextran sieving coefficient of physiologic saline is 0.9 or or more for 1,000 molecular weight, 0.3-0.95 for 10,000 and 0.4 or less for 100,000.
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