POROUS HOLLOW FIBER MEMBRANE

WIPO Patent Application WO/2020/059752

A1

This porous hollow fiber membrane contains polyethersulfone or polysulfone, has an inner diameter of 300 to 600 µm, a thickness of 70 to 200 µm, and a fractional molecular weight of 10,000 or less, comprises a plurality of micropores with a diameter of 0.1 to 0.5 µm on the entire outer surface, and has a swelling ratio of less than 5%. Swelling ratio (%): Each of 20 or more porous hollow fiber membranes is measured for thickness at 10 or more arbitrary sites in a cross section in the width direction, the average thickness is calculated from the thicknesses measured at 200 or more sites in total, and the swelling ratio is calculated on the basis of the formula below. Swelling ratio (%) = (number of sites at which measured thickness is more than 1.3 times larger than average thickness)/(number of thickness measurements) × 100

NAKATSUKA SHUJI (JP)
SUNOHARA TAKASHI (JP)
TAKAHASHI TOSHINARI (JP)

PCT/JP2019/036560

March 26, 2020

September 18, 2019

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DAICEN MEMBRANE SYSTEMS LTD (JP)
NIPRO CORP (JP)

A61M1/18; B01D61/14; B01D63/02; B01D69/00; B01D69/02; B01D69/08; B01D71/68; D01F6/76

EP2636442A1	2013-09-11
CN1579603A	2005-02-16
JPH07155570A	1995-06-20
JP2017100105A	2017-06-08
JP2004121608A	2004-04-22
JP2006247444A	2006-09-21
JP2004089800A	2004-03-25

SHIGERU SATO: "Changes in Efficacy of Endotoxin Removal Filters due to Long-term Use", J. JPN. SOC. DIAL. THER., vol. 34, no. 11, 2001, pages 1409 - 1413
See also references of EP 3854430A4

FURUYA Satoshi (JP)

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