| abstract |
(57) [Summary] [Object] To provide a method for producing a porous hollow fiber membrane which has a sufficient gas exchange capacity and does not leak plasma during long-term use and is suitable for an artificial lung. According to the production method of the present invention, a kneaded product obtained by kneading polypropylene, an organic filler that is uniformly dispersed in polypropylene under melting of the polypropylene, and a crystal nucleating agent is melted in an annular spinning hole. It is based on an extraction method in which the hollow kneaded product is discharged in a hollow form, the hollow kneaded product is brought into contact with a cooling and solidifying liquid to be cooled and solidified, and then the organic filler is removed from the cooled and solidified hollow kneaded product. In particular, as a cooling solidification liquid, Use one consisting of a mixture of polyethylene glycol and water. |