Modified viscose fiber

Abstract

The invention relates to a modified viscose fiber containing an incorporated material from algae. The fiber according to the invention is characterized by a wet modulus at an elongation of 5% in the wet state which complies with the following formula: wet modulus ( cN )≥0.5*√ T, wherein T is the titer of the fiber in dtex.

1 . A modified viscose fiber containing comprising an incorporated algal material, wherein the fiber comprises a wet modulus at an elongation of 5% in the wet state which complies with the following formula:
   wet modulus ( cN )≥0.5 *√T,  
   wherein T is the titer of the fiber in dtex.   
     
     
         2 . The modified viscose fiber according to  claim 1 , wherein the fiber comprises a fiber strength in the conditioned state which complies with the following formula:
   fiber strength ( cN /tex)≥27.38−1.4 *T.  
   
     
     
         3 . The modified viscose fiber according to  claim 1 , wherein the fiber comprises a content of zinc ions of at least 200 ppm. 
     
     
         4 . The modified viscose fiber according to  claim 1 , wherein the fiber comprises a content of algal material of at least 0.5% by weight. 
     
     
         5 . A process for the production of the modified viscose fiber according to  claim 1 , comprising:
 spinning a viscose having a content of 4% by weight to 7% by weight of cellulose, 5% by weight to 10% by weight of NaOH, 34% by weight to 42% by weight (based on cellulose) of carbon disulphide and 1% by weight to 5% by weight (based on cellulose) of a modifier into a spinning bath, and   drawing off the coagulated filaments;
 wherein the viscose comprises a spinning gamma value ranges from 50 to 68 and a spinning viscosity which ranges from 50 falling-ball seconds to 150 falling-ball seconds; 
 wherein the alkali ratio (cellulose concentration/alkali content) of the viscose ranges from 0.7 to 1.5, and a temperature of a spinning bath ranges from 34° C. to 48° C., 
 wherein the spinning bath comprises: 
   
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   H2SO4 
                   68 g/l-90 g/l  
                 
                     
                   Na2SO4 
                    90 g/l-160 g/l 
                 
                     
                   ZnSO4 
                   30 g/l-65 g/l, 
                 
                     
                     
                 
             
                
               
               
                
                
                
                
               
            
           
         
         wherein a final draw-off from the spinning bath occurs at a rate of between 15 m/min and 60 m/min, and wherein an algal material in the form of an aqueous dispersion is spun in. 
       
     
     
         6 . The process according to  claim 5 , wherein the aqueous dispersion has a content of algal material of 2% by weight to 15% by weight. 
     
     
         7 . A yarn comprising the modified viscose fiber according to  claim 1 . 
     
     
         8 . The modified viscose fiber according to  claim 3 , wherein the content of zinc ions is 200 ppm to 700 ppm. 
     
     
         9 . The modified viscose fiber according to  claim 4 , wherein the content of algal material is 2% by weight to 6% by weight. 
     
     
         10 . A planar textile assembly comprising the modified viscose fiber according to  claim 1 .