Flame-retardant fabric and protective clothing made of the same

Abstract

The present invention relates to a flame-retardant fabric that includes modacrylic fibers, one or more of regenerated cellulose fibers selected from the group consisting of flame-retardant rayon fibers and lyocell fibers, and polyimide fibers. The flame-retardant fabric includes the modacrylic fibers in an amount of 26 to 79 wt%, the regenerated cellulose fibers in an amount of 18 to 48 wt%, and the polyimide fibers in an amount of 3 to 26 wt%. The polyimide fibers have a fiber length of 45 to 127 mm. The char length measured by a flammability test based on GB/T 5455-1997 is 50 mm or less. The present invention also relates to protective clothing made of the flame-retardant fabric. Thus, the present invention provides a flame-retardant fabric whose char length is short in a flammability test and that has favorable flame retardancy, and protective clothing made of the flame-retardant fabric.

1 . A flame-retardant fabric comprising:
 modacrylic fibers;   one or more of regenerated cellulose fibers selected from the group consisting of flame-retardant rayon fibers and lyocell fibers; and   polyimide fibers,   wherein the flame-retardant fabric comprises the modacrylic fibers in an amount of 44.5 to 79 wt%, the regenerated cellulose fibers in an amount of 18 to 48 wt%, and the polyimide fibers in an amount of 3 to 8 wt%,   both the polyimide fibers and the modacrylic fibers have a fiber length of 45 to 127 mm, and   a char length of the flame-retardant fabric measured by a flammability test based on GB/T 5455-1997 is 50 mm or less.   
     
     
         2 . (canceled) 
     
     
         3 . The flame-retardant fabric according to  claim 1 , 
 wherein the one or more of regenerated cellulose fibers have a fiber length of 45 to 127 mm.   
     
     
         4 . The flame-retardant fabric according to any one of  claim 1 ,
 wherein the modacrylic fibers are comprised of an acrylonitrile copolymer that includes acrylonitrile in an amount of 35 to 85 wt%, one or more halogen-containing monomers selected from the group consisting of halogen-containing vinyl monomers and halogen-containing vinylidene monomers in an amount of 15 to 65 wt%, and a vinyl monomer having a sulfonic group in an amount of 3 wt% or less.   
     
     
         5 . The flame-retardant fabric according to any one of  claim 1 ,
 wherein the modacrylic fibers comprise an antimony compound in an amount of 3.9 to 20 wt%.   
     
     
         6 . The flame-retardant fabric according to any one of  claim 1 ,
 wherein the flame-retardant rayon fibers comprise a phosphorus-based flame retardant.   
     
     
         7 . The flame-retardant fabric according to any one of  claim 1 , comprising:
 the modacrylic fibers in an amount of 44.5 to 79 wt%;   the regenerated cellulose fibers in an amount of 18 to 48 wt%; and   the polyimide fibers in an amount of 3 to 7.5 wt%.   
     
     
         8 . The flame-retardant fabric according to any one of  claim 1 ,
 wherein the acrylonitrile copolymer comprises a halogen-containing vinyl monomer, and   the regenerated cellulose fibers comprise flame-retardant rayon fibers.   
     
     
         9 . The flame-retardant fabric according to any one of  claim 1 , which is a woven fabric. 
     
     
         10 . Protective clothing made of the flame-retardant fabric according to any one of  claim 1 . 
     
     
         11 . The flame-retardant fabric according to  claim 1 , wherein the regenerated cellulose fibers comprise the lyocell fibers. 
     
     
         12 . The flame-retardant fabric according to  claim 1 , wherein all of the modacrylic fibers, the regenerated cellulose fibers, and the polyimide fibers have a fiber length of 45 to 64 mm.