Ozone process for denim

a denim fabric and ozone technology, applied in the dyeing process, other washing machines, liquid cleaning, etc., can solve the problems of high cost, unfriendly to the environment, and high cost of the process, and achieve the effects of high cost, unfriendly to the environment, and safe operation

Inactive Publication Date: 2011-04-14
MYUNG JASON +2
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  • Abstract
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  • Application Information

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Benefits of technology

[0015]The present invention is an improved apparatus for decolorizing a denim fabric with an oxidizing gas having an ozone monitoring unit for monitoring the concentration of ozone in ambient for providing safety of operation. Such an apparatus is free from costly enzymes and chemicals that have high cost and unfriendly to the environm

Problems solved by technology

However, in this process costly enzymes are utilized for decolorizing the fabrics.
Moreover, this process also requires chemicals that have high cost

Method used

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  • Ozone process for denim
  • Ozone process for denim
  • Ozone process for denim

Examples

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Embodiment Construction

[0019]FIG. 1 illustrates an apparatus for decolorizing at least one denim fabric 10 with an oxidizing gas comprising at least one air compressor 12 for producing compressed air, at least one air separator 14 for producing dry air, and at least one pressure regulator 16 for regulating the air pressure of dry air at an air pressure of about 90 psia. The at least one air compressor 12 produces compressed air containing approximately of about 21% oxygen and approximately of about 79% nitrogen at an air pressure of about 100 psia (pounds per square inch absolute). The at least one air separator 14 removes the unwanted elements from the compressed air. The unwanted particles in the compressed air may include oil, moisture or the like.

[0020]The apparatus 10 further includes at least one oxygen generator 18 that filters out nitrogen present in the dry air at the air pressure of about 90 psia for producing dry air containing approximately of about 95% pure oxygen. The at least one oxygen gen...

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Abstract

An apparatus and a method for decolorizing a denim fabric with an oxidizing gas is disclosed. The process is initiated by producing compressed air which is processed to generate dry air. The air pressure of dry air is reduced to maintain at 10 psig and thereby generates ozone gas. A negative pressure is maintained to ensure no ozone leak out to ambient from a washer. The denim fabric may be exposed to a controlled amount of ozone gas for a predetermined time such as a process time. Whenever the process time expires, the amount of ozone gas is converted back to oxygen by running a variable speed motor at high speed to create a negative pressure within the processing unit and released to atmosphere. The method also incorporates a means for monitoring the level of ozone concentration in ambient for the safety of operators.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]Not Applicable.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT[0002]Not Applicable.FIELD OF THE INVENTION[0003]This invention relates to an apparatus for the treatment of a denim fabric with an is oxidizing gas. More particularly, an apparatus for treating the dry denim fabric with ozone gas for decolorizing dyes, coloring agents on the fabric.DISCUSSION OF RELATED ART[0004]Denim is considered to be world's one of the oldest fabric. The popularity of denim fabrics is high in almost every age group. Denim fabrics provide comfort, durability, versatility and glamour. The decolorization of denim fabrics are done by processes such as stone washing, ice washing, sand blasting, rubbing with sand paper or pumice stone etc. Neutralization process using hot water and chemicals, and processes utilizing potassium permanganate spray are also used to provide the desired fading effect.[0005]U.S. Pat. No. 7,252,688 to Tashiro on Aug. 7,...

Claims

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Application Information

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IPC IPC(8): D06L3/04D06L4/50
CPCD06P5/153D06B11/0096
Inventor MYUNG, JASONPARK, DANIELKOH, MYUNG
Owner MYUNG JASON
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