PROBLEM TO BE SOLVED: To provide a porous hollow fiber membrane having little generation of undrawn portions, and excellent in homogeneity, and thereby suited to plasma separation application, as a porous hollow fiber membrane obtained by a melt drawing opening method.SOLUTION: In a porous hollow fiber membrane for plasma separation having a pore structure molded by a melt drawing opening method, and containing a polyolefin resin and a higher fatty acid metal salt, and a hydrophilic layer in which a hole surface of the pore structure is coated with a hydrophilic polymer, the higher fatty acid metal salt is contained as much as 0.01-0.3 mass% to the total amount of the polyolefin resin and the higher fatty acid metal salt.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】溶融延伸開孔法で得られる多孔質中空糸膜として、未延伸部の発生が少なく均質性に優れることで、血漿分離用途に適した多孔質中空糸膜を提供すること。【解決手段】ポリオレフィン系樹脂と高級脂肪酸金属塩を含む、溶融延伸開孔法により成型された多孔構造と、該多孔構造の孔表面が親水性高分子で被覆された親水性層と、を有し、ポリオレフィン系樹脂と高級脂肪酸金属塩の総量に対して高級脂肪酸金属塩を0.01~0.3質量%含む、血漿分離用多孔質中空糸膜。【選択図】なし
