Hydrogel-forming multicomponent fiber
AssigneeCarl Freudenberg KG
InventorsBirgit Kosan, Michael Mooz, Frank Meister
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Abstract
A hydrogel-forming multicomponent fiber includes: at least one first fiber component; and at least one second fiber component. The first and the second fiber components are selected independently of one another from a group consisting of polysaccharides and/or polysaccharide derivatives. The first fiber component is produced from a polysaccharide and/or a polysaccharide derivative having a water solubility of more than 50% by weight. The multicomponent fiber has a water solubility of less than 15% by weight.
Claims18
A hydrogel-forming multicomponent fiber, comprising:
- at least one first fiber component;
- and
- at least one second fiber component,
- wherein the first fiber component is produced from a first polymer component comprising at least one ionic cellulose ether, nonionic cellulose ether, or a combination thereof having a water solubility of more than 50% by weight,
- wherein the second fiber component is produced from a second polymer component comprising cellulose,
- wherein the first and the second fiber components are present as a mixed phase wherein the first and the second fiber components form entanglement networks, looping networks, or a combination thereof with one another, and
- wherein the multicomponent fiber has a water solubility of less than 15% by weight.
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.
The method according to 12, wherein no chemical crosslinking of the first and/or second fiber component via covalent and/or ionic bonds is carried out.
Dependencies are inferred from the claim text.