Method for boiling-off of blended fabric from polyamide fiber and polyurethane fiber, method for producing dyed blended fabric and dyed blended fabric

Abstract

A method for scouring a mixed fabric of polyamide fibers and polyurethane fibers is provided, wherein soft water as treating water is used and the treating water contains a sequestering agent. According to the present invention, a mixed fabric of polyamide fibers and polyurethane fibers in which uneven dyeing hardly arises, that is, excellent leveling is achieved, is provided.

1 . A method for scouring a mixed fabric of polyamide fibers and polyurethane fibers, characterized in that soft water as treating water is used and the treating water contains a sequestering agent.  
     
     
         2 . A method for continuously scouring a mixed fabric of polyamide fibers and polyurethane fibers, characterized in that treating water after finishing scouring treatment contains an unreacted sequestering agent.  
     
     
         3 . The method for scouring a mixed fabric of polyamide fibers and polyurethane fibers according to  claim 2 , wherein the scouring is performed by a plurality of scouring steps and the sequestering agent is added at least at the first step.  
     
     
         4 . The method for scouring a mixed fabric of polyamide fibers and polyurethane fibers according to  claim 1  or  2 , wherein the sequestering agent is ethylenediaminetetraacetic acid and/or diethylenetriaminepentaacetic acid.  
     
     
         5 . The method for scouring a mixed fabric of polyamide fibers and polyurethane fibers according to  claim 1  or  2 , wherein the treating water further contains a dispersant.  
     
     
         6 . A method for manufacturing a dyed mixed fabric of polyamide fibers and polyurethane fibers, characterized in that the method comprises the steps of scouring a mixed fabric of polyamide fibers and polyurethane fibers, presetting the mixed fabric at 190° C. or less for 60 seconds or less, dyeing the mixed fabric, and finishing the mixed fabric.  
     
     
         7 . The method for manufacturing a dyed mixed fabric of polyamide fibers and polyurethane fibers according to  claim 6 , wherein a tentering rate in the presetting step is 40% or less of the width of the scoured fabric.  
     
     
         8 . The method for manufacturing a dyed mixed fabric of polyamide fibers and polyurethane fibers according to  claim 6 , wherein a stretching rate in the presetting step is 5% or less of the length of the scoured fabric.  
     
     
         9 . A method for manufacturing a dyed mixed fabric of polyamide fibers and polyurethane fibers, characterized in that the method comprises the step of dyeing a mixed fabric of polyamide fibers and polyurethane fibers with an acid dye, wherein soft water as a dyeing solution is used and the dyeing solution contains a sequestering agent.  
     
     
         10 . A dyed mixed fabric of polyamide fibers and polyurethane fibers manufactured by the method according to  claim 6  or  9 .  
     
     
         11 . The dyed mixed fabric of polyamide fibers and polyurethane fibers according to  claim 10 , wherein the dyed mixed fabric is a knitted fabric.  
     
     
         12 . The dyed mixed fabric of polyamide fibers and polyurethane fibers according to  claim 10 , wherein the dyed mixed fabric is a warp-knitted fabric.