US 12,128,364 B2
Spinneret, device having a spinneret, method for producing a hollow fiber or hollow fiber membrane by means of a spinneret and filter
Torsten Keller, St. Wendel (DE); Jens Holger Stahl, Marpingen (DE); and Eric Sommer, Poppenhausen (DE)
Assigned to FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH, Bad Homburg (DE)
Appl. No. 16/611,219
Filed by FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH, Bad Homburg (DE)
PCT Filed May 9, 2018, PCT No. PCT/EP2018/062067
§ 371(c)(1), (2) Date Nov. 6, 2019,
PCT Pub. No. WO2018/206675, PCT Pub. Date Nov. 15, 2018.
Claims priority of application No. 10 2017 208 011.6 (DE), filed on May 11, 2017.
Prior Publication US 2020/0156014 A1, May 21, 2020
Int. Cl. B01D 69/08 (2006.01); B01D 61/24 (2006.01); D01D 4/06 (2006.01); D01D 5/24 (2006.01)
CPC B01D 69/085 (2013.01) [B01D 61/243 (2013.01); B01D 69/088 (2013.01); D01D 4/06 (2013.01); D01D 5/24 (2013.01); B01D 2323/42 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A spinning nozzle for extrusion of a hollow fiber membrane from a plurality of spinning masses, wherein
the spinning nozzle has a plurality of inlet ports, including an inlet port for each respective spinning mass to be extruded, each inlet port being configured for introducing the respective spinning mass into the spinning nozzle,
the spinning nozzle has a plurality of nozzle outlet ports, each nozzle outlet port being configured for an exit of one or more of the plurality of spinning masses out of the spinning nozzle along a respective outlet axis,
the spinning nozzle has a plurality of spinning mass flow channels, each spinning mass flow channel having a channel inlet port and a channel outlet port and being configured for guiding a respective one of the plurality of spinning masses from a respective one of the channel inlet ports to a respective one of the channel outlet ports,
at least one of the spinning mass flow channels comprises a first flow manipulation section having a single inlet and a plurality of flow openings through which the respective one of the plurality of spinning masses must pass in order to reach the respective channel outlet port, the first flow manipulation section comprising a flow-guiding structure for guiding the respective spinning mass through the respective spinning mass flow channel between the single inlet and the plurality of flow openings of the first flow manipulation section,
the flow-guiding structure is configured to guide the respective spinning mass such that at least a portion of the respective spinning mass flows through the first flow manipulation section along different flow paths, wherein the flow-guiding structure comprises a plurality of cascaded mass flow dividers, dividing the respective spinning mass into the different flow paths, and each of the different flow paths begins at the single inlet and ends at the respective channel outlet port,
each of the different flow paths running through the first flow manipulation section has a respective path length between the single inlet and the respective channel outlet port, and
all of the respective path lengths are the same.