US 12,280,339 B2
Hollow fibre membrane with improved separating efficiency, and production of a hollow fibre membrane with improved separating efficiency
Torsten Keller, St. Wendel (DE); Michael Paul, Lebach (DE); and Roland Sander, St. Wendel (DE)
Assigned to FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH, Bad Homburg (DE)
Filed by FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH, Bad Homburg (DE)
Filed on Aug. 25, 2022, as Appl. No. 17/895,085.
Application 17/895,085 is a division of application No. 16/467,057, granted, now 11,478,759, previously published as PCT/EP2017/081955, filed on Dec. 8, 2017.
Claims priority of application No. 10 2016 224 627.5 (DE), filed on Dec. 9, 2016.
Prior Publication US 2022/0410080 A1, Dec. 29, 2022
Int. Cl. B01D 65/02 (2006.01); B01D 69/08 (2006.01); B01D 71/44 (2006.01); B01D 71/68 (2006.01); B01D 71/62 (2006.01)
CPC B01D 69/088 (2013.01) [B01D 65/022 (2013.01); B01D 71/441 (2022.08); B01D 71/62 (2013.01); B01D 71/68 (2013.01); B01D 2323/081 (2022.08); B01D 2323/12 (2013.01); B01D 2325/0283 (2022.08); B01D 2325/26 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A hollow fiber membrane comprising at least one polysulfone-based material and at least one polyvinylpyrrolidone-based polymer, wherein the hollow fiber membrane has a porosity of 77.5% to 82%, a sieving coefficient for dextran at a molecular weight of 10,000 g/mol of 0.42 to 0.75 when an aqueous dextran solution is passed therethrough, and a sieving coefficient for albumin of less than 0.01 and a zeta potential of −4 mV to −8 mV, and wherein the hollow fiber membrane is sterile, wherein the radius of the nominal pore size distribution exhibits a maximum in the range of from 22 to 26 A (angstrom).