Method for producing colored yarns and/or colored fabrics in particular without or with only limited amount of wastewater discharge

Abstract

This invention relates to a method for producing a colored yarn based on synthetic fibers, wherein the method comprises the addition of a spinning additive. The spinning additive is self-elutable and/or self-sluicing upon washing the yarn and/or a fabric spun from the yarn with an aqueous solution and/or the spinning additive is water-soluble. The spinning additive can therefore be easily removed from the yarn and/or fabric produced of the yarn by washing with water.

1 . A method for producing a colored yarn based on synthetic fibers, wherein the method comprises:
 adding of a spinning additive,   wherein   the spinning additive is self-elutable and/or self-sluicing upon washing the yarn and/or a fabric spun from the yarn with an aqueous solution and/or the spinning additive is water-soluble.   
     
     
         2 . The method according to  claim 1 , wherein the method for producing a colored yarn includes and/or is a dope-dyeing process. 
     
     
         3 . The method according to  claim 2 , wherein the dope-dyeing process comprises the method steps of
 providing the base materials as a polymer melt and/or extruding the base materials, and   spinning a yarn from the molten polymer.   
     
     
         4 . The method  claim 1 , wherein the method comprises the following method steps in the following order:
 a) providing separately from another a color masterbatch material and a plastic granular base material, followed by mixing to obtain a mixed color masterbatch material and plastic granular base material, and/or providing a mixed color masterbatch material and plastic granular base material,   b) providing the mixed color masterbatch material and plastic granular base materials as molten polymer and/or extruding the mixed color masterbatch material and plastic granular base materials,   c) spinning a yarn from the molten polymer,   adding a spinning additive in at least one of the method steps a), b) and/or c), wherein the spinning additive is self-elutable and/or self-sluicing upon washing the yarn and/or a fabric spun from the yarn with an aqueous solution.   
     
     
         5 . The method according to  claim 4 , wherein the plastic granular base material comprises and/or is a thermoplastic polymer material. 
     
     
         6 . The method according to  claim 1 , wherein the added spinning additive comprises at least one surface-active substance based on ethyleneoxide, propylenoxide and mixtures thereof and/or
 wherein the surface-active substance is a substance from the group of polyethers.   
     
     
         7 . The method according to  claim 1 , wherein the added spinning additive in addition comprises surfactants, preservatives, lubricants. 
     
     
         8 . The method according to  claim 1 , wherein the method comprises a further method step:
 manufacturing a colored fabric from the yarn.   
     
     
         9 . The method according to  claim 1 , wherein the method comprises a further method step:
 washing and finishing the obtained colored fabric.   
     
     
         10 . A method for producing a colored fabric based on synthetic fibers,
 wherein the method comprises the addition of a spinning additive, wherein the spinning additive is self-elutable and/or self-sluicing upon washing the fabric with an aqueous solution and/or wherein the spinning additive is water-soluble, and/or   wherein the method includes a method for producing a colored yarn based on synthetic fibers according to  claim 1 .   
     
     
         11 . The method for producing a colored fabric based on synthetic fibers, wherein the method includes a method for producing a colored yarn based on synthetic fibers according to  claim 1 , wherein the aqueous solution used while washing and finishing the obtained colored fabric is subjected to a treatment process. 
     
     
         12 . The method according to  claim 11 , wherein in a first process step i) of the treatment process the aqueous solution used is treated with a water cleaning agent. 
     
     
         13 . (canceled) 
     
     
         14 . A colored yarn comprising a spinning additive, wherein the spinning additive is self-elutable and/or self-sluicing upon washing the yarn with an aqueous solution. 
     
     
         15 . The colored fabric obtained by a method for producing a colored fabric based on synthetic fibers according to  claim 1 . 
     
     
         16 . The method according to  claim 12 , wherein the water cleaning agent is selected such that remains in the aqueous solution used coagulate; and/or
 wherein the water cleaning agent is selected from flocculants, flocculation aids, clarifying agents, precipitants, coagulants, pH-regulators, and mixtures thereof.   
     
     
         17 . The method according to  claim 16 , wherein the water cleaning is inorganically based. 
     
     
         18 . A method for producing a colored yarn based on synthetic fibers, wherein the method comprises the following method steps in the following order:
 a) providing separately from another a color masterbatch material and a plastic granular base material, followed by mixing to obtain a mixed color masterbatch material and plastic granular base material, and/or providing a mixed color masterbatch material and plastic granular base material,   b) providing the mixed color masterbatch material and plastic granular base materials as molten polymer and/or extruding the mixed color masterbatch material and plastic granular base materials,   c) spinning a yarn from the molten polymer,   adding a spinning additive in at least one of the method steps a), b) and/or c), wherein the spinning additive is self-elutable and/or self-sluicing upon washing the yarn and/or a fabric spun from the yarn with an aqueous solution.   
     
     
         19 . The method according to  claim 18 , wherein in at least one of the method steps a), b) and/or c) the added spinning additive comprises at least one surface-active substance based on polyethylenoxide, polypropylenoxide and copolymers and mixtures thereof, and/or
 wherein the surface-active substance is a substance from the group of polyethers, wherein the polyether is a polyether of ethylenoxide, propylenoxide and mixtures thereof,   wherein the surface-active substance is selected from the group of glycerol ethoxylate, polyoxyethylene-polyoxypropylene block-copolymers (Poloxamer), potassium polyoxyethylene laurylether phosphate, and mixtures thereof.   
     
     
         20 . The method according to  claim 18 , wherein the method comprises a further method step:
 manufacturing a colored fabric from the yarn as a method step d).   
     
     
         21 . The method according to  claim 20 , wherein after manufacturing a colored fabric from the yarn and/or method step d), the method comprises a further method step:
 washing and finishing the obtained colored fabric as a method step e).