HOLLOW FIBER MEMBRANE MODULE, METHOD FOR PRODUCING HOLLOW FIBER MEMBRANE, AND METHOD FOR PRODUCING HOLLOW FIBER MEMBRANE MODULE

摘要

An object of the present invention is to provide a dry-type hollow fiber membrane module which is excellent in blood compatibility and elutes little eluted substance, and a hollow fiber membrane built in the module, and a method for producing a hollow fiber membrane module. Disclosed is a hollow fiber membrane module including a built-in hollow fiber membrane including a hydrophobic polymer and a hydrophilic group-containing polymer, the hollow fiber membrane module satisfying the following items: (a) the water content of the hollow fiber membrane is 10% by weight or less relative to the tare weight of the hollow fiber membrane, (b) the hydrophobic polymer contains no nitrogen, the hydrophilic group-containing polymer contains nitrogen, and the nitrogen content of the hollow fiber membrane is 0.05% by weight or more and 0.4% byweight or less, (c) the content of the hydrophilic group-containing polymer in the inner surface of the membrane is 20% by weight or more and 45% by weight or less, and (d) the consumption amount of an aqueous potassium permanganate solution (2.0×10−3 mol/L) used for titrating an eluted substance in 10 mL of a last part of a priming liquid is 0.2 mL or less per 1 m2 of a membrane area.

主权项

1. A hollow fiber membrane module comprising a built-in hollow fiber membrane including a hydrophobic polymer and a hydrophilic group-containing polymer, the hollow fiber membrane module satisfying the following items:
(a) the water content of the hollow fiber membrane is 10% by weight or less relative to the tare weight of the hollow fiber membrane, (b) the hydrophobic polymer contains no nitrogen, the hydrophilic group-containing polymer contains nitrogen, and the nitrogen content of the hollow fiber membrane is 0.05% by weight or more and 0.4% by weight or less, (c) the content of the hydrophilic group-containing polymer in the inner surface of the membrane is 20% by weight or more and 45% by weight or less, and (d) the consumption amount of an aqueous potassium permanganate solution (2.0×10−3 mol/L) used for titrating an eluted substance in 10 mL of a last part of a priming liquid is 0.2 mL or less per 1 m2 of a membrane area.