| 摘要 |
PROBLEM TO BE SOLVED: To prepare a semipermeable hollow fiber membrane provided with fixed crimps without causing flattening, profiling, blockading, or the like, by a treatment at a temperature of at most 50 deg.C in semipermeable hollow fiber membranes used for permeation of various liquids containing water or for treatment of blood. SOLUTION: The semipermeable hollow fiber membrane provided with fixed crimps with little flattening, profiling, blockading, or the like, obtained by providing deformations exceeding yield elongation at the temperature of at most 50 deg.C intermittently in the length direction on parts of the circumference of the hollow fiber membrane in providing the crimps on the hollow fiber membrane under a wet condition or a substantially dry condition, a method for obtaining the hollow fiber membrane and an apparatus for providing the crimps on the hollow fiber membrane, are provided.
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