Fluorescent elastic yarn and method for producing the same

Abstract

Disclosed is a fluorescent elastic yarn and method for producing the same. The fluorescent elastic yarn can fluoresce sufficiently to allow a thin elastic yarn to be seen by the naked eye when ultraviolet light is irradiated to the fluorescent elastic yarn by adding a novel organic additive to a polymer or a spinfinish. Therefore, the fluorescent elastic yarn of the present invention is advantageous in that production of inferior covered yarns is prevented.

What is claimed is:  
     
         1 . A fluorescent elastic yarn comprising 0.001 to 20 wt % of a fluorescent brightener.  
     
     
         2 . A method for producing a fluorescent elastic yarn comprising the step of spinning a polyurethane-urea copolymer, 
 wherein a fluorescent brightener is mixed with the polyurethane-urea copolymer in an amount of 0.001 to 20 wt %.    
     
     
         3 . A method for producing a fluorescent elastic yarn comprising the step of spinning a polyurethane-urea copolymer, 
 wherein a spinfinish having a fluorescent brightener dispersed therein is applied to a spun elastic yarn in such an amount that a content of the fluorescent brightener in the resulting elastic yarn ranges from 0.001 to 20 wt %.    
     
     
         4 . The method according to  claim 2 , wherein the fluorescent brightener is selected from the group consisting of a stilbene-based fluorescent brightener, a pyrazolone-based fluorescent brightener, an imidazole-based fluorescent brightener, an oxazole-based fluorescent brightener, a coumarin-based fluorescent brightener, a rhodamine-based fluorescent brightener and a fluorescein-based fluorescent brightener.  
     
     
         5 . The method according to  claim 3 , wherein the fluorescent brightener is selected from the group consisting of a stilbene-based fluorescent brightener, a pyrazolone-based fluorescent brightener, an imidazole-based fluorescent brightener, an oxazole-based fluorescent brightener, a coumarin-based fluorescent brightener, a rhodamine-based fluorescent brightener and a fluorescein-based fluorescent brightener.  
     
     
         6 . A method for producing a covered fluorescent elastic yarn, comprising the step of covering a core yarn, 
 wherein the core yarn is the fluorescent elastic yarn according to  claim 1 .    
     
     
         7 . The method according to  claim 6 , wherein the fluorescent elastic yarn is covered with at least one selected from the group consisting of cotton, rayon, nylon, polyester and cellulose.  
     
     
         8 . A covered fluorescent elastic yarn produced through the method according to claims  6  and  7 .  
     
     
         9 . A core spun yarn produced through the method according to  claim 5.