Method of producing cotton fiber product having smooth surfaces and cotton-regenerated cellulose compound yarn or fabric

Abstract

It is aimed to produce cotton fibers and fabrics containing thereof, which are excellent in dyeability and has gloss on surfaces and soft touch, or in otherwise to produce cotton-regenerated cellulose composite fiber product that has improved coloring evenness between the cotton fibers and the regenerated cellulose while keeping soft touch and sufficint dyeability. Yarns, fabrics or the like is subjected to processing with aqueous solution of alkaline metal hydroxide having surface tension of no more than 75 dyn/cm 2 ; the processing being made under no tensile stress until static friction coefficient of the cotton fibers become 50 to 75% of that before the processing, or the processing being made under tensile stress until the static friction coefficient become 40 to 65% of that before the processing.

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       7 . A method for producing a processed fiber product comprising: 
 providing a fiber product comprising cotton fibers;    providing an aqueous solution of alkaline metal hydroxide having a surface tension of no more than 75 dyn/cm 2  when measured at 24° C.; and    processing said fiber product comprising cotton fibers with said aqueous solution of alkaline metal hydroxide.    
   
   
       8 . The method of  claim 7 , wherein said processing is made under no tensile stress until a static friction coefficient of said cotton fibers becomes 50-75% of a static friction coefficient of said cotton fibers before said processing.  
   
   
       9 . The method of  claim 7 , wherein said processing is made under tensile stress until a static friction coefficient of said cotton fibers becomes 40-65% of the static friction coefficient of said cotton fibers before said processing.  
   
   
       10 . The method of  claim 7 , wherein said product comprising cotton fibers comprises a cotton and regenerated cellulose composite fiber product.  
   
   
       11 . The method of  claim 8 , wherein said product comprising cotton fibers comprises a cotton and regenerated cellulose composite fiber product.  
   
   
       12 . The method of  claim 9 , wherein said product comprising cotton fibers comprises a cotton and regenerated cellulose composite fiber product.  
   
   
       13 . The method of  claim 10 , further comprising dyeing said composite fiber product.  
   
   
       14 . The method of  claim 11 , further comprising dyeing said composite fiber product.  
   
   
       15 . The method of  claim 12 , further comprising dyeing said composite fiber product.  
   
   
       16 . The method of  claim 13 , wherein said cotton fibers have a K/S that is 50 to 90% of a K/S on said regenerated cellulose fibers.  
   
   
       17 . The method of  claim 14 , wherein said cotton fibers have a K/S that is 50 to 90% of a K/S on said generated cellulose fibers.  
   
   
       18 . The method of  claim 15 , wherein said cotton fibers have a K/S that is 50 to 90% of a K/S on said generated cellulose fibers.  
   
   
       19 . The method of  claim 13 , wherein said dyed composite fiber has a K/S value 150 to 300% of a K/S value on a dyed composite fiber product obtained by omitting said processing.  
   
   
       20 . The method of  claim 14 , wherein said dyed composite fiber has a K/S value 150 to 300% of a K/S value on a dyed composite fiber product obtained by omitting said processing.  
   
   
       21 . The method of  claim 15 , wherein said dyed composite fiber has a K/S value 150 to 300% of a K/S value on a dyed composite fiber product obtained by omitting said processing.  
   
   
       22 . The method of  claim 7 , wherein said product comprising cotton fibers comprises at least one selected from yarns, fabrics, and cotton wools.  
   
   
       23 . The method of  claim 10 , wherein said cotton and regenerated cellulose composite fiber product comprises at least one selected from yarns, fabrics, and cotton wools.  
   
   
       24 . The method of  claim 7 , further comprising dyeing said composite fiber product, wherein 
 said product comprising cotton fibers comprises a cotton and regenerated cellulose composite fiber product,    said processing is made under no tensile stress until a static friction coefficient of said cotton fibers becomes 50% to 75% of a static friction coefficient of said cotton fibers before said processing or said processing is made under tensile stress until a static friction coefficient of said cotton fibers becomes 40% to 65% of a static friction coefficient of said cotton fibers before said processing, and    a K/S value on said cotton fibers is 50% to 90% of a K/S value on said regenerated cellulose fibers.    
   
   
       25 . The method of  claim 7 , further comprising dyeing said composite fiber product, wherein 
 said product comprising cotton fibers comprises a cotton and regenerated cellulose composite fiber product,    said processing is made under no tensile stress until a static friction coefficient of said cotton fibers becomes 50% to 75% of a static friction coefficient of said cotton fibers before said processing or said processing is made under tensile stress until a static friction coefficient of said cotton fibers becomes 40% to 65% of a static friction coefficient of said cotton fibers before said processing, and    a K/S value on said dyed composite fiber is 150 to 300% of a K/S value on a dyed composite fiber product obtained by omitting said processing.