Method for treating high strength fabric to be water repellent

Abstract

The present invention relates to a method for treating high-strength fabric to be water-repellent, which includes dipping a high-strength fabric in a water-repellent agent composition to impregnate the high-strength fabric with the water-repellent agent composition, and then, using an air-suction machine to pick-up a part of the water-repellent agent composition impregnated in the high-strength fabric before drying and heating the same. The present invention has advantages in that a part of the water-repellent agent composition impregnated in the high-strength fabric may be uniformly picked-up during dipping, so as to improve water-repellent performance, especially, water-repellency after friction as well as initial water-repellency, and may effectively prevent occurrence of wrinkles on the high-strength fabric during water-repellent treatment. The high-strength fabric obtained by water-repellent treatment according to the present invention exhibits increased flexibility without wrinkles, so as to improve wearing comfort. Further, in case of using the fabric as a raw fabric for bulletproof garments, water-repellency is increased to prevent deterioration in bulletproof properties caused by water absorption.

1 . A method for treating high strength-fabric to be water-repellent, comprising: dipping the high-strength fabric in a water-repellent agent composition to impregnate the high-strength fabric with the water-repellent agent composition; and using an air-suction machine to pick-up a part of the water-repellent agent composition impregnated in the high-strength fabric, before drying and heating the same. 
     
     
         2 . The method according to  claim 1 , wherein the high-strength fabric is firstly pre-dried and then dipped in the water-repellent agent composition. 
     
     
         3 . The method according to  claim 1 , wherein 35 to 65% of the water-repellent agent composition impregnated in the high-strength fabric is picked-up by using the air-suction machine. 
     
     
         4 . The method according to  claim 1 , wherein the water-repellent agent composition is a water-soluble solution containing hydroxylated perfluoroalkylethyl acrylate copolymer. 
     
     
         5 . The method according to  claim 4 , wherein a content of hydroxylated perfluoroalkylethyl acrylate copolymer in the water-repellent agent composition ranges from 2 to 35 wt. parts to 100 wt. parts of the water-repellent agent composition. 
     
     
         6 . The method according to  claim 1 , wherein the high-strength fabric is a fabric woven by warp and weft wherein at least one of the warp and weft includes one high-strength yarn selected from a group consisting of wholly aromatic polyamide multifilament, glass fiber and carbon fiber.