Method for Decolorizing a Denim Fabric Using Ozone

• US 20140068871A1
• Filed: 01/21/2013
• Published: 03/13/2014
• Est. Priority Date: 09/07/2012
• Status: Active Grant

• Current Assignee: Wiser Wash Inc.
• Original Assignee: Wiser Wash Inc.
• Inventors: Youn, Kevin Jin
• Granted Patent: US 9,562,318 B2
• Time in Patent Office: Days
• US Class Current: 8/111
• CPC Class Codes: D06L 1/14 De-sizing
• CPC Class Codes: D06L 4/13 using inorganic agents
• CPC Class Codes: D06L 4/50 by irradiation or ozonisation
• CPC Class Codes: D06P 5/132 with oxidants
• CPC Class Codes: D06P 5/153 with oxidants

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.

Claims

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;

a step of wetting the textile product with water and removing excess water from the water-soaked textile product;

a step of exposing the textile product to ozone gas for decolorizing the textile product; and

a step of washing the textile product with water and dehydrating 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 2 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.

5. The method for decolorizing a textile product of claim 3 wherein the weight ratio of the cotton fabric scraps to water is about 1.0:

0.5˜

1.5 and the weight ratio of the textile product to the cotton fabric scraps is about 1.0;

0.2˜

1.0.

6. The method for decolorizing a textile product of claim 3 wherein the ozone treatment is performed for up to one hour.

7. The method for decolorizing a textile product of claim 1 wherein the method for decolorizing a textile product does not use bleach to oxidize the textile product.

8. The method for decolorizing a textile product of claim 1 wherein the method for decolorizing a textile product does not use KMnO₄.

9. The method for decolorizing a textile product of claim 1 wherein the method for decolorizing a textile product does not use pocket white.

10. The method for decolorizing a textile product of claim 1 wherein the textile product is denim.

11. 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.

12. The method for decolorizing a textile product of claim 11 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.

13. The method for decolorizing a textile product of claim 13 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.

14. The method for decolorizing a textile product of claim 13 wherein the cotton fabric scraps are about or smaller than 25 square inches.

15. A Method for decolorizing a textile product, comprising:

a step of loading the textile product and cotton fabric scraps into a drum wherein the cotton fabric scraps are wetted with water;

a step of supplying and stirring ozone gas inside the drum;

a step of rotating the air-tight drum; and

a step of washing the textile product with water and dehydrating the textile product.

16. The method for decolorizing a textile product of claim 15 wherein the cotton fabric scraps are about or smaller than 25 square inches.

17. The method for decolorizing a textile product of claim 15 wherein the weight ratio of the cotton fabric scraps to water is about 1.0:

0.5˜

1.5 and the weight ratio of the textile product to the cotton fabric scraps is about 1.0;

0.2˜

1.0.

18. The method for decolorizing a textile product of claim 15 wherein the ozone treatment is performed for up to one hour.

19. The method for decolorizing a textile product of claim 15 wherein the textile product is denim.

20. The method for decolorizing a textile product of claim 15 wherein the textile product is t-shirts.