Patent ID: 11898274
Assignee: CARL FREUDENBERG KG
Field: Medical technology (Instruments)
Classification: CPC D  A | IPC A  D

Claim 11:
12. A method for preparation of a hydrogel-forming multicomponent fiber having a water solubility of less than 15% by weight, comprising the following steps:
preparing at least one spinning solution by a common dissolution in a solvent of at least one first polymer component and at least one second polymer component, wherein the first polymer component comprises at least one ionic cellulose ether, nonionic cellulose ether, or a combination thereof and has a water solubility of more than 50% by weight, and wherein the second polymer component comprises cellulose,
feeding the at least one spinning solution to a spinneret and extruding the at least one spinning solution through the spinneret into an air gap to produce a multicomponent structure;
introducing the multicomponent structure into a precipitation bath to form the multicomponent fiber;
removing the solvent in at least one washing bath; and
drying the multicomponent fiber.