Method for Decolorizing a Denim Fabric Using Ozone

Abstract

This invention relates to a method for decolorizing a dyed denim fabric through a dry ozone process to obtain an aesthetically pleasing decolorized look or fashionably faded look in the denim fabric. The method comprises three dry ozone treatment processes used alone or in combination thereof. The first dry ozone treatment process includes wetting a denim textile product with water and oxidizing it with ozone. The second dry ozone treatment process includes spraying water to desired areas of the textile product and oxidizing it with ozone. The third dry ozone treatment process includes loading the denim textile product and wetted cotton fabric scraps into a drum, and oxidizing them with ozone.

What is claimed is: 
     
         1 . A Method for decolorizing a textile product, comprising:
 a dry process for manually treating a textile product;   a desize process for removing starch from the textile product;   spraying water to desired areas of the textile, product;   exposing the textile product to ozone gas to decolorize the textile product;   rinsing the textile product; and   drying the textile product.   
     
     
         2 . The method for decolorizing a textile product of  claim 1  wherein the step of exposing the textile product to ozone gas comprises
 a step of loading the textile product into a drum; 
 a step of supplying and stirring ozone gas inside the drum; and 
 a step of rotating the air-tight drum. 
 
     
     
         3 . The method for decolorizing a textile product of claim  3  wherein cotton fabric scraps are loaded into the drum, before the step of supplying and stirring ozone gas inside the drum wherein the cotton fabric scraps are wetted with water. 
     
     
         4 . The method for decolorizing a textile product of  claim 3  wherein the cotton fabric scraps are about or smaller than 25 square inches.