Method for the manufacture of fibrous yarn

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.

1 . An extruded fibrous construction or composite yarn, comprising:
 fibers oriented essentially in a direction of the yarn; and   at least one rheology modifier, wherein   the extruded fibrous construction or composite yarn was produced directly from a fiber suspension by   providing an aqueous suspension comprising the fibers and the at least one rheology modifier;   directing said suspension through at least one nozzle, to form the fibrous construction or composite yarn, the at least one nozzle has an inner diameter of an outlet smaller than a maximum length weighed fiber length of the fibers; and   dewatering the fibrous construction or composite yarn.   
     
     
         2 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein said fibers originate from at least one plant based raw material source. 
     
     
         3 . The extruded fibrous construction or composite yarn according to  claim 2 , wherein said plant based raw material source is a virgin source or recycled source or any combination thereof. 
     
     
         4 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein the suspension comprises virgin or recycled fibers originating from synthetic materials, or from natural materials, or combinations thereof. 
     
     
         5 . The extruded fibrous construction or composite yarn fibrous construction or composite yarn according to  claim 1 , wherein the rheology modifier is selected from the group consisting of alginic acid, alginates, pectin, carrageenan, nanofibrillar cellulose and combinations thereof. 
     
     
         6 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein an amount of the rheology modifier is from 0.1 to 20 weight %. 
     
     
         7 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein the suspension comprises at least one dispersion agent, an anionic long chain polymer or NFC or a combination thereof. 
     
     
         8 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein the suspension comprises additives selected from the group consisting of surfactants, hydrophobicity agents, hydrophilicity agents, colorants, strength modifiers, elasticity modifiers, tensile strength modifiers, decorative pieces and metal powder. 
     
     
         9 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein the suspension comprises alginates, pectin or carrageenan and at least one dispersion agent, and the yarn is treated with an aqueous solution comprising at least one cation prior to dewatering. 
     
     
         10 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein the dewatering is carried out with at least one method based on vacuum, mechanical pressing and/or thermal drying. 
     
     
         11 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein the at least one nozzle comprises an inner die or orifice, and an outer die or orifice. 
     
     
         12 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein the at least one nozzle comprises an inner die or orifice for the suspension, and an outer die or orifice for an aqueous solution containing at least one cation. 
     
     
         13 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein the at least one nozzle is arranged vertically to provide a continuous yarn of the suspension below each nozzle, falling freely with the aid of gravitational force. 
     
     
         14 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein the at least one nozzle deviates from a vertical position and is arranged in a vicinity of a gutter which acts as a supporting body to the yarn. 
     
     
         15 . The extruded fibrous construction or composite yarn according to  claim 1 , wherein there are a plurality of nozzles and gutters, and the gutters are arranged spirally on a surface of cylindrical drums.