US 12,145,108 B2
Spinneret
Reinhold Buck, Alleshausen (DE); Evelyn Grossmann, Esslingen (DE); Markus Hornung, Nehren (DE); Markus Loeffler, Hechingen (DE); Heinrich Behr, Hechingen (DE); Arnd Wochner, Dotternhausen (DE); and Carl-Philipp Scheuermann, Balingen (DE)
Assigned to GAMBRO LUNDIA AB, Lund (SE)
Appl. No. 17/786,685
Filed by GAMBRO LUNDIA AB, Lund (SE)
PCT Filed Dec. 21, 2020, PCT No. PCT/EP2020/087375
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/130145, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 19219557 (EP), filed on Dec. 23, 2019.
Prior Publication US 2022/0339585 A1, Oct. 27, 2022
Int. Cl. B01D 69/08 (2006.01); B01D 71/44 (2006.01); B01D 71/68 (2006.01); B29C 48/00 (2019.01); B29C 48/05 (2019.01); B29C 48/09 (2019.01); B29C 48/32 (2019.01); B29C 48/345 (2019.01); B29K 81/00 (2006.01); B29L 31/00 (2006.01); D01D 5/06 (2006.01); D01D 5/24 (2006.01); D01F 6/76 (2006.01)
CPC B01D 69/085 (2013.01) [B01D 71/441 (2022.08); B01D 71/68 (2013.01); B29C 48/022 (2019.02); B29C 48/05 (2019.02); B29C 48/09 (2019.02); B29C 48/32 (2019.02); B29C 48/345 (2019.02); D01D 5/06 (2013.01); D01D 5/24 (2013.01); D01F 6/76 (2013.01); B01D 2323/42 (2013.01); B29K 2081/06 (2013.01); B29L 2031/755 (2013.01); D10B 2331/30 (2013.01); D10B 2331/301 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A spinneret for producing hollow fiber membranes, comprising two nozzles, wherein each nozzle comprises an outer ring slit and a central orifice,
wherein the outer ring slits of the two nozzles are in fluid communication with a compartment for a polymer solution,
wherein the spinneret comprises a spinneret body and two nozzle inserts having identical dimensions and each comprising a capillary, a reservoir for a center fluid, and a feed port for a center fluid,
wherein the spinneret comprises a single feed port for a polymer solution located in a side wall of the spinneret and connected to the compartment for a polymer solution, characterized in that the feed port for the polymer solution is connected to the compartment defined by the inner wall of the spinneret body and the outer surface of the nozzle inserts,
wherein the compartment comprises a first rotationally-symmetrical shell formed around a first nozzle insert, a second rotationally-symmetrical shell formed around a second nozzle insert, and a tubular duct connecting the first rotationally-symmetrical shell and the second rotationally-symmetrical shell aligned with the orifice of the feed port for the polymer solution and having the same inner diameter as the feed port for the polymer solution,
wherein each capillary is connected to a separate reservoir for the center fluid not in fluid communication with the other reservoirs and which in turn is connected to a separate feed port for the center fluid.