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Batch dyeing method to dye cotton fabrics with vat dyes under enhanced oxidation and zero soaping

A technology for cotton fabrics and dyes, applied in the field of printing and dyeing, can solve the problems of high consumption and achieve the effects of reducing emissions, improving efficiency, and shortening the process route

Inactive Publication Date: 2019-03-19
SHANXI CAIJIA PRINTING & DYEING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the soaping process consumes a lot of water, electricity, and steam. Whether the saponification treatment can remove the floating color on the surface of the dyed matter, change the shade of the dye in the fiber, and improve the light fastness of some dyes remains to be further studied.

Method used

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  • Batch dyeing method to dye cotton fabrics with vat dyes under enhanced oxidation and zero soaping
  • Batch dyeing method to dye cotton fabrics with vat dyes under enhanced oxidation and zero soaping
  • Batch dyeing method to dye cotton fabrics with vat dyes under enhanced oxidation and zero soaping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A method for intermittent dyeing of cotton fabric vat dyes to strengthen oxidation and remove soaping, comprising the following steps: after mercerizing, dry cloth is restored in a full bath before dyeing, jigger dyeing, vat passing, oxidation, cold washing, hot washing, cold washing, rolling up ;

[0061] Oxidation working solution includes: 100% hydrogen peroxide 4g / L.

[0062] The dyeing solution includes: diffusing agent 1.5g / L, vat dye 0.26%owf;

[0063] The reducing solution includes: 100% caustic soda 5g / L, 85% hydrosulfite 5g / L;

[0064] The remainder is water;

[0065] Bath ratio: 1:4.

[0066] The jigger temperature is 62±0.5°C.

[0067] The oxidation temperature was 40°C.

[0068] The hot wash temperature is 88°C.

Embodiment 2

[0070] A method for intermittent dyeing of cotton fabric vat dyes to strengthen oxidation and remove soaping, comprising the following steps: after mercerizing, dry cloth is restored in a full bath before dyeing, jigger dyeing, vat passing, oxidation, cold washing, hot washing, cold washing, rolling up ;

[0071] Oxidation working solution includes: 100% hydrogen peroxide 6g / L.

[0072] The dyeing solution includes: diffusing agent 1g / L, vat dye 1.94%owf;

[0073] The reducing solution includes: 100% caustic soda 8g / L, 85% sodium hydrosulfite 8g / L, sodium sulfate 12g / L;

[0074] The remainder is water;

[0075] Bath ratio: 1:5.

[0076] The jigger temperature is 62±0.5°C.

[0077] The oxidation temperature was 40°C.

[0078] The hot washing temperature is 90°C.

Embodiment 3

[0080] A method for intermittent dyeing of cotton fabric vat dyes to strengthen oxidation and remove soaping, comprising the following steps: after mercerizing, dry cloth is restored in a full bath before dyeing, jigger dyeing, vat passing, oxidation, cold washing, hot washing, cold washing, rolling up ;

[0081] Oxidation working solution includes: 100% hydrogen peroxide 7g / L.

[0082] The dyeing solution includes: dispersant 0.5g / L, vat dye 4.14%owf;

[0083] The reducing solution includes: 100% caustic soda 11g / L, 85% sodium hydrosulfite 11g / L, sodium sulfate 24g / L;

[0084] The remainder is water;

[0085] Bath ratio: 1:4.

[0086] The jigger temperature is 62±0.5°C.

[0087] The oxidation temperature was 40°C.

[0088] The hot wash temperature is 85°C.

[0089] A production line is calculated based on 12 sets of 180 dyeing jiggers in large rolls using the intermittent production method of vat dyes. Each dyeing machine produces 4 large rolls of cloth every day. The d...

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Abstract

The invention relates to a batch dyeing method to dye cotton fabrics with vat dyes under enhanced oxidation and zero soaping and belongs to the technical field of printing and dyeing. The technical problem to be solved is to provide a batch dyeing method with vat dyes under enhanced oxidation and zero soaping. The batch dyeing method to dye cotton fabrics with vat dyes under enhanced oxidation andzero soaping comprises the steps of after mercerizing and before dyeing entry for dry fabric, performing all-in bath reduction, carrying out jig dyeing and vat treating, oxidizing, cold washing, hotwashing, cold washing, and rolling. An oxidizing liquid includes 1-7 g / L OF 100% hydrogen peroxide; a reducing liquid includes 3.2-12 g / L of 100% caustic soda, 3-12 g / L of 85% sodium hydrosulfite and-24 g / L of sodium sulfate. The oxidation parameters of the traditional process are adjusted, oxidation is enhanced, soaping is omitted, the process route is shortened, benefit is improved, and the cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of printing and dyeing, and in particular relates to a method for intermittent dyeing of cotton fabrics with vat dyes and enhanced oxidation and soaping removal. Background technique [0002] Vat dyes are widely used in the dyeing of cotton fabrics or polyester-cotton blended fabrics. Vat dyes have relatively complete chromatograms, bright colors, and good color fastness, especially washing and light fastness, which are inferior to other dyes. Commercially, vat dyes with high light fastness are called Shihlin dyes, and those with poor light fastness are called Ashlin dyes. [0003] The conjugated system of vat dye molecules generally has two or more conjugated carbonyl groups, and carbonyl groups are hydrophobic groups that have no affinity for cotton. Under alkaline conditions, the carbonyl group in the dye molecule is decomposed by a strong reducing agent reduced to , to become a soluble vat dye leuc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/22D06P1/673D06P3/60D06P5/02
CPCD06P1/22D06P1/6735D06P3/6025D06P5/02
Inventor 柴化珍马学亚冯森陈拉倩牛虹强惠泽柴沛东赵增全武文斌翟智民邵正元杜江宁张国义
Owner SHANXI CAIJIA PRINTING & DYEING
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