Porous hollow fiber membrane

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United States of America Patent

PATENT NO 11058996
APP PUB NO 20190070565A1
SERIAL NO

16079837

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Abstract

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An object of the present invention is to provide a porous hollow-fiber membrane satisfying both high strength and high pure-water permeation performance and at the same time, having high bending resistance. The present invention relates to a porous hollow-fiber membrane including a fluororesin-based polymer, in which the porous hollow-fiber membrane has a columnar texture oriented in a longitudinal direction of the porous hollow-fiber membrane and when a photograph of a cross-section parallel to the longitudinal direction of the porous hollow-fiber membrane is binarized into a structure portion and a void portion, the following 1) and 2) are satisfied: 1) a proportion of an area of the void portion is from 20 to 50%, and 2) a value obtained by dividing a total of peripheral lengths of the void portions by a total of areas of the void portions is 2.0 μm−1 or less.

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Patent Owner(s)

Patent OwnerAddress
TORAY INDUSTRIES INCTOKYO JAPAN TOKYO METROPOLIS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hanakawa, Masayuki Shiga, JP 30 164
Ishizaki, Toshiyuki Shiga, JP 11 123
Iwai, Kenta Shiga, JP 24 48
Yasuda, Takaaki Shiga, JP 8 1

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