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Pure cotton fabric reduced dye dyeing method

A technology for pure cotton fabrics and dyeing methods, applied in dyeing methods, textiles, papermaking, bleaching products, etc., can solve the problems of harmful gas hydrogen sulfide, flammability, and large amounts of sulfide in printing and dyeing wastewater

Inactive Publication Date: 2014-09-17
福建金苑服饰有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The reduction of vat dyes generally uses caustic soda and sodium hydrosulfite. However, sodium hydrosulfide is poor in stability and flammable, and sodium sulfide is also used as a reducing agent. However, the reduction effect is difficult to control, and harmful gas hydrogen sulfide is produced during the dyeing process, and printing and dyeing wastewater Contains a large amount of sulfide, difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Select pure cotton fabric, the warp and weft densities are 28 threads / cm, 27 threads / cm, the seam head, the stitch density is 35cm / needle, and the thread length at both ends of the seam head is 4cm; the pretreatment liquid includes sodium hypochlorite 12g / L, polyoxygen Ethylene alkylphenol ether 2g / L, potassium permanganate 0.2g / L after padding, the liquid carrying rate is 80%, and then stacked at a constant temperature of 90°C for 45min, and then use polyoxyethylene ether fatty alcohol ether 2g / L and oxalic acid Wash thoroughly with 1g / L hot solution for 5 minutes, then wash twice with cold water. Firstly, 2wt% vat dyes are made into slurry with Swire oil, and then diluted with water according to the fabric to bath ratio of 1:10, then add thiourea dioxide 3g / L, isotridecyl alcohol polyoxyethylene ether 2g / L, glucose 1g / L, sodium silicate 2g / L, sodium sulfide 1g / L, heat up to 45°C at a rate of 1°C / min while stirring, and fully reduce the dye for 20min to obtain the leuc...

Embodiment 2

[0030] Select pure cotton fabric, the warp and weft density is 28 threads / cm, 27 threads / cm, the seam head, the stitch density is 35cm / needle, and the thread length at both ends of the seam head is 3cm; the pretreatment liquid includes sodium hypochlorite 12g / L, polyoxygen Ethylene alkylphenol ether 2g / L, potassium permanganate 0.2g / L after padding, the liquid carrying rate is 80%, and then stacked at a constant temperature of 90°C for 45min, and then use polyoxyethylene ether fatty alcohol ether 2g / L and oxalic acid Wash thoroughly with 1g / L hot solution for 5 minutes, then wash twice with cold water. Then add swire oil dropwise to 2wt% reduced indigo to make a slurry, then dilute with water, then add 3wt% sodium bicarbonate, 6wt% thiourea dioxide, and 6g / L caustic soda, stir and heat up to 45°C to make the dye fully After reducing for 20 minutes, the leuco solution of the vat dye can be obtained; soak the pure cotton fabric, then place it in the leuco solution of the vat dye...

Embodiment 3

[0032] Select pure cotton fabric, the warp and weft density is 28 threads / cm, 27 threads / cm, the seam head, the stitch density is 35cm / needle, and the thread length at both ends of the seam head is 3cm; the pretreatment liquid includes sodium hypochlorite 12g / L, polyoxygen Ethylene alkylphenol ether 2g / L, potassium permanganate 0.2g / L after padding, the liquid carrying rate is 80%, and then stacked at a constant temperature of 90°C for 45min, and then use polyoxyethylene ether fatty alcohol ether 2g / L and oxalic acid Wash thoroughly with 1g / L hot solution for 5 minutes, then wash twice with cold water. Then add swire oil dropwise to 2wt% reduced indigo to make a slurry, then dilute with water, then add 3wt% thiourea dioxide, 6wt% sodium sulfide, and 6g / L caustic soda, stir and heat up to 45°C to make the dye fully After reducing for 20 minutes, the leuco solution of the vat dye can be obtained; soak the pure cotton fabric, then place it in the leuco solution of the vat dye, ra...

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PUM

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Abstract

The invention relates to a pure cotton fabric reduced dye dyeing method which comprises the following steps: (1) textile preparation; (2) textile pretreatment; (3) preparation of reduced dye leuco body solution; (4) dip dyeing of reduced dye; (5) soap boiling and (6) after-finishing. The reduced dye leuco body solution is prepared by the following raw materials: 1-10g / L thiourea dioxide, 2-5g / L of iso-tridecanol polyoxyethylene ether, 1-2g / L of glucose, 2-5g / L of sodium silicate, and 1-2g / L of sodium sulfide. The K / S value of the dyed textile is obviously improved.

Description

technical field [0001] The invention relates to the field of dyeing cotton fabrics, in particular to a method for dyeing pure cotton fabrics with vat dyes. Background technique [0002] Vat dyes are commonly used dyes in modern printing and dyeing factories. They have a long history, and our country has been dyed with plant vat dye indigo very early. Vat dyes are insoluble in water and generally have two or several conjugated carbonyl groups in their conjugated system. Under alkaline conditions, the carbonyl group is reduced, and the dye can become a water-soluble leucosome sodium salt, referred to as leucosome. The leuco body dyes the cellulose fiber, and after oxidation, the leuco body returns to an insoluble dye and fixes on the fiber. [0003] The reduction of vat dyes generally uses caustic soda and sodium hydrosulfite. However, sodium hydrosulfide is poor in stability and flammable, and sodium sulfide is also used as a reducing agent. However, the reduction effect i...

Claims

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Application Information

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IPC IPC(8): D06P1/22D06P1/655D06P1/613D06P1/651D06P1/673D06P3/60D06L3/06D06L3/00D06L4/21D06L4/23
Inventor 耿云花
Owner 福建金苑服饰有限公司
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