Bulletproof fabric and method for producing the same

Abstract

Disclosed are a bulletproof fabric and a method for producing the same that exhibit improved anti-traumaproperty and minimize deterioration in bulletproofness even after use under harsh conditions for a long period of time. The bulletproof fabric includes a fabric comprising at least one high-strength fiber selected from the group consisting of a high molecular weight polyethylene fiber, an aramid fiber, and a polybenzoxazole fiber, and a water repellent layer disposed on the high-strength fiber, wherein the water repellent layer is formed by treating the fabric with a water-repellent agent comprising fluorocarbon and a hardness-enhancing resin, and the hardness-enhancing resin is a polyvinyl acetate resin, a polyester resin, a polyacrylate resin, a melamine resin, or a mixture of two or more thereof.

1 . A bulletproof fabric comprising:
 a fabric comprising at least one high-strength fiber selected from the group consisting of a high molecular weight polyethylene fiber, an aramid fiber, and a polybenzoxazole fiber; and   a water repellent layer disposed on the high-strength fiber,   wherein the water repellent layer is formed by treating the fabric with a water-repellent agent comprising fluorocarbon and a hardness-enhancing resin, and   the hardness-enhancing resin is a polyvinyl acetate resin, a polyester resin, a polyacrylate resin, a melamine resin, or a mixture of two or more thereof.   
     
     
         2 . The bulletproof fabric according to  claim 1 , wherein a stiffness of the bulletproof fabric measured using a circular bending procedure in accordance with ASTM D4032 is 10 to 70 N, and
 a backface deformation of the bulletproof fabric measured using a 44 Mag. bullet in accordance with the regulation of NIJ Level IIIA is 44 mm or less.   
     
     
         3 . The bulletproof fabric according to  claim 1 , wherein the fluorocarbon is a hydroxylated perfluoroalkylethyl acrylate copolymer. 
     
     
         4 . The bulletproof fabric according to  claim 1 , wherein the water-repellent agent further comprises a cross-linking agent. 
     
     
         5 . The bulletproof fabric according to  claim 4 , wherein the water-repellent agent comprises 0.5 to 10% by weight of fluorocarbon, 0.5 to 10% by weight of a hardness-enhancing resin, 0.5 to 5% by weight of a cross-linking agent, 0.02 to 2% by weight of an antifoaming agent, 0.02 to 2% by weight of a pH adjuster, 0.1 to 2% by weight of an emulsion stabilizer, and 69 to 98.36% by weight of water. 
     
     
         6 . The bulletproof fabric according to  claim 4 , wherein the cross-linking agent is an isocyanate compound. 
     
     
         7 . The bulletproof fabric according to  claim 6 , wherein the cross-linking agent is toluene diisocyanate or methylene diphenyl diisocyanate. 
     
     
         8 . The bulletproof fabric according to  claim 6 , wherein the hardness-enhancing resin is a polyvinyl acetate resin,
 a stiffness of the bulletproof fabric measured using a circular bend procedure in accordance with ASTM D4032 is 10 to 70 N, and a backface deformation of the bulletproof fabric measured using a 44 Mag. bullet in accordance with the regulation of NIJ Level IIIA is 40 mm or less.   
     
     
         9 . A method for producing a bulletproof fabric comprising:
 preparing a fabric using at least one high-strength fiber selected from the group consisting of a high molecular weight polyethylene fiber, an aramid fiber, and a polybenzoxazole fiber;   preparing a water-repellent agent comprising fluorocarbon and a hardness-enhancing resin;   applying the water-repellent agent to the fabric; and   heat-treating the water-repellent agent-applied fabric,   wherein the hardness-enhancing resin is a polyvinyl acetate resin, a polyester resin, a polyacrylate resin, a melamine resin, or a mixture of two or more thereof.   
     
     
         10 . The method according to  claim 9 , wherein the application of the water-repellent agent to the fabric is carried out by padding, coating, immersion, spraying, or brushing. 
     
     
         11 . The method according to  claim 9 , further comprising scouring the fabric with a scouring agent comprising a surfactant, before the application of the water-repellent agent to the fabric. 
     
     
         12 . The method according to  claim 9 , wherein the water-repellent agent further comprises a cross-linking agent. 
     
     
         13 . The method according to  claim 12 , wherein the cross-linking agent is an isocyanate compound and the hardness-enhancing resin is a polyvinyl acetate resin. 
     
     
         14 . The method according to  claim 13 , wherein the water-repellent agent comprises 0.5 to 10% by weight of fluorocarbon, 0.5 to 10% by weight of a hardness-enhancing resin, 0.5 to 5% by weight of a cross-linking agent, 0.02 to 2% by weight of an antifoaming agent, 0.02 to 2% by weight of a pH adjuster, 0.1 to 2% by weight of an emulsion stabilizer, and 69 to 98.36% by weight of water. 
     
     
         15 . The method according to  claim 9 , wherein the heat-treatment is carried out at 120 to 200° C. for 15 to 150 seconds.