Toyo Boseki Kabushiki Kaisha

Motoki Kyo

Makoto Ohno

Hidehiko Sakurai

Kazuhisa Shibata

A blood purification membrane having a membrane thickness of 10 to 35 .mu.m, an inner diameter of 100 to 300 .mu.m, a porosity of 50 to 85%, a water permeability (ultrafiltration rate) at 37.degree. C. of not less than 20 ml/m.sup.2 .multidot.Hr.multidot.mmHg and a sieving coefficient of albumin of not more than 0.01, a substantially homogeneous interior structure, and a smooth surface structure. A process for producing the membrane and a module are also provided.

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Otsu, Japan

Motoki Kyo