Kuraray Co., Ltd.

Takehiko Okamoto

Syuji Kawai

Hiroyuki Akasu

Shuzo Ohyabu

Takao Migaki

Ichiro Kawata

Akinori Sueoka

Akio Ohmory

Akio Ohmori

Kensaku Komatsu

Minoru Ueda

The polysulfone hollow fiber membrane of the invention has an inner dense skin layer composed of a polysulfone and a less amount of a polyvinylpyrrolidone, a content of the polyvinylpyrrolidone in the dense skin layer being higher than that in an outer surface layer. This membrane has excellent biocompatibility and antithrombogenetic ability and is, therefore, useful in body fluid treatment, such as hemodialysis, hemofiltration and hemoconcentration, without clogging with thrombi.

Polysulfone-based hollow fiber membrane and process for manufacturing

A composite hollow fiber type separation membrane which has three layers comprising a selective separation layer, an ultra-microporous layer and a porous layer, said selective separation layer, said ultra-microporous layer, said porous layer being arranged in said order commencing from the inner surface of said hollow fiber membrane;

Composite hollow fiber type separation membranes processes for the

The polysulfone hollow fiber membrane provided by the present invention can prohibit bacteria, bacilli, viruses and the like, and is therefore useful, besides as an industrial filter for water purification, as a membrane for body fluid filtration or condensation. In particular, the polysulfone hollow fiber membrane is, being excellent in removing .beta..sub.2 -MG, markedly useful as a membrane for treating body fluid such as hemodialysis and hemofiltration.

Polysulfone hollow fiber membrane and process for making the same

Composite hollow fiber-type separation membranes, processes for the

A polyvinyl alcohol (PVA) microporous membrane is disclosed which is prepared by a process which comprises forming a PVA membrane containing fine silica particles therein and substantially extracting said silica particles from said membrane, thereby forming a plurality of micropores therein with an average diameter of 0.01 to 50 microns and a porosity of at least 60%.

Polyvinyl alcohol semi-permeable membrane and method for producing same

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Kurashiki, Japan

Takehiko Okamoto