Method for decolorization of fabrics
First Claim
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1. A method for me random decolorizing or fading of fabric containing oxidizable dyes or coloring agents comprising:
- tumbling the fabric in a chamber in the presence of a fabric treating agent and moisture whereby the treating agent is attached to random portions of the fabric and is an oxidation inhibitor selected from the group consisting of aluminum acetate aluminum sulfate, aluminum hydroxide, magnesium acetate, magnesium hydroxide and sodium bisulfite or an ozone activator derived from a dicarboxylic acid or anhydride; and
oxidizing the fabric containing the treating agent with a gaseous oxidizing agent whereby the oxidized fabric is randomly decolorizcd or faded.
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Abstract
The invention disclosed herein relates to improved methods for decolorizing or fading fabrics with gaseous oxidizing agents. The methods involve tumbling the fabrics in the presence of moisture and a treating agent for delivery of the treating agent to random portions of the fabrics. After tumbling for a sufficient period of time, the fabrics are then oxidized with a gaseous oxidizing agent such as ozone.
21 Citations
22 Claims
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1. A method for me random decolorizing or fading of fabric containing oxidizable dyes or coloring agents comprising:
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tumbling the fabric in a chamber in the presence of a fabric treating agent and moisture whereby the treating agent is attached to random portions of the fabric and is an oxidation inhibitor selected from the group consisting of aluminum acetate aluminum sulfate, aluminum hydroxide, magnesium acetate, magnesium hydroxide and sodium bisulfite or an ozone activator derived from a dicarboxylic acid or anhydride; and oxidizing the fabric containing the treating agent with a gaseous oxidizing agent whereby the oxidized fabric is randomly decolorizcd or faded. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for randomly fading fabrics comprising:
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treating fabrics containing oxidizable dyes or colorants with a desizing agent; rinsing the fabrics to remove the desizing agent; extracting the rinse water from the desized fabrics to a moisture content of from about 5 to about 50 wt. %; tumbling the moist fabric with an erodible pelletized oxidation inhibitor selected from the group consisting of aluminum acetate, aluminum sulfate, aluminum hydrxoxide, magnesium acetate, magnesium hydroxide and sodium bisulfite for a period of time sufficient to transfer an amount of the oxidation inhibitor to the fabric whereby the inhibitor is attached to random portions of the fabric; and oxidizing the fabric with a gaseous oxidizing agent whereby a randomly faded fabric is formed. - View Dependent Claims (9, 10, 11)
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12. A method for decolorizing a cellulosic fiber containing fabric having an oxidizable dye or coloring agent whereby damage to the fibers is substantially avoided, the method comprising:
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tumbling the fabric in a chamber with an oxidation inhibitor selected from the group consisting of aluminum acetate, aluminum sulfate, aluminum hydroxide, magnesium acetate, magnesium hydroxide and sodium bisulfite in the presence of moisture for a period of time sufficient to transfer an amount of oxidation inhibitor to random portions of the fabric; and oxidizing the fabric with a gaseous oxidizing agent whereby the oxidized fabric is randomly decolorized. - View Dependent Claims (13, 14, 15, 16)
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17. A method for randomly fading fabric containing an oxidizable dye or coloring agent comprising:
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tumbling the fabric in a chamber in the presence of moisture and an oxidation activator derived from a dicarboxylic acid or anhydride; and oxidizing the tumbled fabric in the presence of moisture with a gaseous oxidizing agent whereby a randomly faded fabric is obtained. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification