Method of flame-retardant treating blend fabric

Abstract

Disclosed is a method of flame-retardant treating a blend fabric including natural fibers and synthetic fibers to impart flame retardancy to the blend fabric, including treating the fabric with a first flame retardant, primarily tentering the fabric, water-rinsing the primarily tentered fabric, washing the water-rinsed fabric, drying the washed fabric, treating the dried fabric with a second flame retardant, and then secondarily tentering the fabric.

1 . A method of flame-retardant treating a blend fabric comprising natural fibers and synthetic fibers to impart flame retardancy to the blend fabric, the method comprising:
 treating the blend fabric with a first flame retardant and then primarily tentering the blend fabric, thus obtaining a primarily tentered blend fabric;   water-rinsing the primarily tentered blend fabric, thus obtaining a water-rinsed blend fabric;   washing the water-rinsed blend fabric, thus obtaining a washed blend fabric;   drying the washed blend fabric, thus obtaining a dried blend fabric; and   treating the dried blend fabric with a second flame retardant and then secondarily tentering the blend fabric.   
     
     
         2 . The method of  claim 1 , further comprising treating the primarily tentered blend fabric with ammonia, between the primarily tentering and the water-rinsing. 
     
     
         3 . The method of  claim 1 , further comprising oxidizing the primarily tentered blend fabric, between the primarily tentering and the water-rinsing. 
     
     
         4 . The method of  claim 1 , wherein the primarily tentering is performed by passing the blend fabric treated with the first flame retardant through a first tentering bath at 100˜140° C. at a rate of 15˜25 m/min. 
     
     
         5 . The method of  claim 1 , wherein the secondarily tentering is performed by passing the blend fabric treated with the second flame retardant through a second tentering bath at 170˜210° C. at a rate of 10˜30 m/min. 
     
     
         6 . The method of  claim 1 , wherein the first flame retardant is used to flame-retardant treat the natural fibers of the blend fabric, and the second flame retardant is used to flame-retardant treat the synthetic fibers of the blend fabric. 
     
     
         7 . The method of  claim 1 , wherein the water-rinsing is repeated four or more times. 
     
     
         8 . The method of  claim 7 , wherein the water-rinsing is performed by water-rinsing the primarily tentered blend fabric in a water-rinsing bath containing water at 25˜85° C. and an alkaline chemical for 1 min or more. 
     
     
         9 . The method of  claim 1 , wherein the water-rinsing is performed by water-rinsing the primarily tentered blend fabric in a water-rinsing bath containing water at 25˜85° C. and an alkaline chemical for 1 min or more. 
     
     
         10 . The method of  claim 1 , wherein the washing is performed by washing the water-rinsed blend fabric in a washing bath containing water at 65˜85° C. and a neutral detergent, and then rinsing the blend fabric to remove the neutral detergent therefrom. 
     
     
         11 . The method of  claim 1 , wherein the treating the blend fabric with the first flame retardant to the secondarily tentering the blend fabric are continuously performed.