| abstract |
(57) [Summary] [Purpose] When manufacturing a hollow fiber membrane for blood treatment such as hemodialysis, hemofiltration and dialysis, and plasma separation, flattening of the hollow fiber membrane, Provided is a method for imparting a good crimp to the hollow fiber membrane without causing deformation or blockage. [Structure] The hollow fiber membrane is crimped in a non-dried state, and then the crimped hollow fiber membrane is heat-treated in a non-dried state (for example, immersed in hot water for treatment) to be flattened. Fix the crimp while preventing deformation, blockage, etc. |