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Anhydrous Dyeing Method of Simultaneously Dyeing and Fixing Color on Cotton Fabrics with Dark Shades

A waterless dyeing and cotton fabric technology, applied in the field of printing and dyeing, can solve problems such as emissions

Active Publication Date: 2021-03-30
浙江环发纺织印染有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Further, the purpose of the present invention is to simultaneously solve the problems of wastewater discharge caused by water-bath dyeing, dyeing dark tones, and improving the blackness of black cotton fabrics, etc.
[0009] Furthermore, the purpose of the present invention is to simultaneously solve the problems of wastewater discharge caused by water-bath dyeing, dyeing dark shades, improving the blackness of black cotton fabrics and providing a color fixation rate comparable to that of the prior art.

Method used

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  • Anhydrous Dyeing Method of Simultaneously Dyeing and Fixing Color on Cotton Fabrics with Dark Shades
  • Anhydrous Dyeing Method of Simultaneously Dyeing and Fixing Color on Cotton Fabrics with Dark Shades
  • Anhydrous Dyeing Method of Simultaneously Dyeing and Fixing Color on Cotton Fabrics with Dark Shades

Examples

Experimental program
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Effect test

Embodiment 1

[0198] Reactive black dye composition is formed by mixing 65% of the dye compound represented by the formula (I-1), 25% of the dye compound represented by the formula (II-1), and 10% of the dye compound represented by the formula (III-1) . The reactive black dye composition was dissolved in an anhydrous solvent of ethylene glycol monomethyl ether acetate and dimethyl sulfoxide at a volume ratio of 70:30 to obtain a dyeing bath. Then add the mixture of triethylenediamine and tetramethylguanidine to the anhydrous dye bath, the weight ratio of the two is 1.6:1; the amount of organic base added is 6g / L. Sonication yields a homogeneous anhydrous dye bath. A cotton fabric previously swollen with dimethyl sulfoxide with a swelling degree of 22% was placed in an anhydrous dyeing bath. The bath ratio of cotton fabric to anhydrous dyeing bath is 1:16g / mL. The dye dosage is 4o.w.f%. Heat up at a rate of 3°C / min, keep warm after reaching the target temperature of 85°C, and dye for 5 h...

Embodiment 2

[0200] Reactive black dye composition is formed by mixing the dye compound shown in 70% formula (I-1), 22% dye compound shown in formula (II-1), and 8% dye compound shown in formula (III-1) . The reactive black dye composition was dissolved in an anhydrous solvent of ethylene glycol monomethyl ether acetate and dimethyl sulfoxide at a volume ratio of 65:35 to obtain a dyeing bath. Then add the mixture of triethylenediamine and tetramethylguanidine to the anhydrous dye bath, the weight ratio of the two is 1.8:1; the amount of organic base added is 8g / L. Sonication yields a homogeneous anhydrous dye bath. A cotton fabric previously swollen with dimethyl sulfoxide with a swelling degree of 22% was placed in an anhydrous dyeing bath. The bath ratio of cotton fabric to anhydrous dyeing bath is 1:18g / mL. The dye dosage is 4o.w.f%. Heat up at a rate of 3°C / min, keep warm after reaching the target temperature of 90°C, and dye for 4 hours; cool to room temperature after dyeing, use...

Embodiment 3

[0202] Reactive black dye composition is formed by mixing the dye compound shown in 60% formula (I-1), 28% dye compound shown in formula (II-1), and 12% dye compound shown in formula (III-1) . The reactive black dye composition was dissolved in an anhydrous solvent of ethylene glycol monomethyl ether acetate and dimethyl sulfoxide at a volume ratio of 75:25 to obtain a dyeing bath. Then add the mixture of triethylenediamine and tetramethylguanidine to the anhydrous dye bath, the weight ratio of the two is 1.5:1; the amount of organic base added is 5g / L. Sonication yields a homogeneous anhydrous dye bath. A cotton fabric previously swollen with dimethyl sulfoxide with a swelling degree of 22% was placed in an anhydrous dyeing bath. The bath ratio of cotton fabric to anhydrous dyeing bath is 1:14g / mL. The dye dosage is 4o.w.f%. Heat up at a rate of 3°C / min, keep warm after reaching the target temperature of 80°C, and dye for 6 hours; cool to room temperature after dyeing, us...

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Abstract

The invention discloses a water-free dyeing method for simultaneously dyeing and color-fixing on deep-color cotton fabric. The method comprises the following steps of: placing the cotton fabric in anwater-free dye bath for dyeing, wherein the water-free dye bath is obtained by dissolving activated dye in an anhydrous solvent, and the activated dye is selected from an activated black dye composition; and further adding organic alkali to the water-free dye bath before warming. The water-free dyeing method is capable of solving problems of wastewater discharge caused by water bath dyeing, deep dyeing, improvement of a black degree of black cotton fabric and the like, providing a color fixation rate higher than that in the prior art, and improving color fastness of the water-free dyeing.

Description

technical field [0001] The invention belongs to the technical field of printing and dyeing, and relates to an anhydrous dyeing method for cotton fabrics, in particular to an anhydrous dyeing method for synchronously dyeing and fixing colors on dark-toned cotton fabrics. Background technique [0002] At present, the dyeing of cotton fabrics is mainly through nucleophilic substitution or addition reaction between reactive groups of reactive dyes and hydroxyl groups on fabric fibers to form chemical bonds. This is usually done in a water bath. Since water molecules are also excellent nucleophiles, there are competing reactions of dye hydrolysis or chemical bond breaking in the solution. In addition, color fixing is usually required after dyeing, and common color fixing agents such as sodium carbonate and sodium phosphate are alkaline substances. This will further aggravate the degree of dye hydrolysis, resulting in low dye fixation rate, and a large amount of unfixed dye rema...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P3/66D06P1/38D06P1/92
CPCD06P1/38D06P1/928D06P3/66
Inventor 钱淼根
Owner 浙江环发纺织印染有限公司