Toyo Boseki Kabushiki Kaisha

Toyobo Co., Ltd.

Morio Miyagi

Makoto Ohno

Masaru Kanaizumi

Kuniomi Etoh

Masaru Nanpei

A hollow fiber membrane of a cellulose ester for dialysis of body liquids, such as blood, and a method are described. The membrane, which has a membrane thickness of less than 20.mu., and a yield strength S.sub.b (g/filament) after heat-treatment at 80.degree. C. for 20 hours satisfies the following formula (I):

Method of making a hollow fiber membrane for dialysis

A hollow fiber membrane of a cellulose ester for dialysis which has a membrane thickness of less than 20.mu., and a yield strength S.sub.b (g/filament) after heat-treatment at 80.degree. C. for 20 hours satisfying the following formula (I):

Hollow fiber membrane for dialysis

A photosensitive resin composition which comprises a polyester having a nitrogen atom in the ammonium salt form in the main or side chain representable by the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a hydrogen atom or a substituted or unsubstituted hydrocarbon group, at least one of R.sub.1 to R.sub.4 representing a polymeric chain, and X is an anion to be paired with the ammonium ion, a photopolymerizable unsaturated monomer and a photosensitizer.

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Otsu, Japan

Morio Miyagi