Decolorizing composition, decolorization method, and decolorization device

Abstract

The present invention appropriately decolorizes a fiber medium that has been colored with a dye.　This decolorizing composition is used to decolorize a fiber medium that has been dyed using a dyeing material containing a dye having sublimation properties such as a sublimable dye or a disperse dye which has sublimation properties. The decolorizing composition contains, as an active ingredient, a chain compound containing one hydroxy group and a plurality of alkoxy groups or ether groups.

Claims

1. A decolorizing composition used for decolorizing textile media dyed with a dyeing material containing a sublimation dye such as a sublimation dye or a sublimable disperse dye, comprising a chain compound containing one hydroxyl group and multiple alkoxy or ether groups as an active ingredient.

2. A decolorizing composition used for decolorizing a textile media dyed with a dyeing material containing a sublimation dye such as a sublimation dye or a sublimable disperse dye, comprising as an active ingredient a chain compound containing one hydroxyl group and multiple alkoxy or ether groups, and a surfactant.

3. The decolorizing composition according to claim 2, wherein the surfactant is at least one of an anionic surfactant and a nonionic surfactant, the anionic surfactant is at least one of a sulfonic acid-based, phosphoric acid-based, lauric acid-based, or dodecylic acid-based surfactant, and the nonionic surfactant is at least one of a surfactant having a hydroxyl group that does not ionically dissociate in water as a hydrophilic group and a surfactant having an ether bond as a hydrophilic group.

4. A decolorizing composition in any one of claims 1 to 3, wherein the chain compound is at least one selected from the following: 2-(2-ethoxyethoxy)ethanol, 2-(2-butoxyethoxy)ethanol, 2-(2-isobutoxyethoxy)ethanol, 2-[2-(butoxyethoxy)ethoxy]ethanol, 2-[2-(methoxyethoxy)ethoxy]ethanol, 2-(2-hexyloxyethoxy)ethanol.

5. A method for decolorizing a textile media dyed with a dyeing material containing a sublimation dye such as a sublimation dye or a sublimation disperse dye, wherein the decolorizing composition used for decolorizing the textile media contains a chain compound having one hydroxyl group and a plurality of alkoxy or ether groups as an active ingredient, and the decolorizing method comprises immersing the textile media in the decolorizing composition and heating it at a temperature higher than the fiber opening temperature at which the molecular chains or intermolecular forces of the fibers loosen, or immersing the textile media in the decolorizing composition heated at a temperature higher than the fiber opening temperature.

6. A decolorizing apparatus for decolorizing a fibrous media dyed with a dyeing material containing a sublimation dye such as a sublimation dye or a sublimable disperse dye, comprising: a decolorizing composition used for decolorizing the fibrous media; a container for containing the fibrous media; and a heating means for heating the decolorizing composition to a temperature higher than the fiber opening temperature at which the molecular chains or intermolecular forces of the fibers loosen, wherein the decolorizing composition used for decolorizing the fibrous media contains a chain-like compound comprising one hydroxyl group and a plurality of alkoxy or ether groups as an active ingredient.

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