Back to results
US 11,685,096 B2Granted
Method for manufacturing fibrous yarn
AssigneeSpinnova Oy
InventorsJuha Salmela, Harri Kiiskinen, Antti Oksanen
Life of this patent
Estimating the term…
Abstract
Disclosed is a method for the manufacture of fibrous yarn including the steps, where an aqueous suspension including fibers and at least one rheology modifier is provided, followed by directing the suspension through at least one nozzle, to form at least one yarn, and then dewatering the yarn.
Claims15
A method for producing a fibrous yarn, the method comprising:
- creating an aqueous suspension comprising virgin plant-based fibers and water;
- generating a moist fibrous yarn in gel form by crosslinking the aqueous suspension using a rheology modifier, wherein the generating further comprises:
- (1) increasing strength of the gel, such that the moist fibrous yarn maintains form during dewatering, by exposing the rheology modifier to an aqueous solution comprising a cation;
- and
- (2) shear thinning the aqueous suspension by adding, in the aqueous suspension, a dispersion agent configured to modify suspension rheology, wherein the dispersion agent is an anionic long chained polymer;
- and
- wherein the aqueous suspension is directed through at least one nozzle, wherein the at least one nozzle comprises an inner die or orifice for the aqueous suspension and an outer die or orifice for the aqueous solution comprising the cation;
- and
- dewatering the moist fibrous yarn to a target water concentration, to produce the fibrous yarn.
6 more elements
Dependencies are inferred from the claim text.