A method for improving the dyeing utilization rate of reactive dyes

A technology of reactive dyes and high utilization rate, applied in the field of dyeing and finishing, can solve the problems of many operation steps, time-consuming and water-consuming, cumbersome operation, etc., and achieve the effect of simple and easy process, saving water consumption and improving utilization rate

Active Publication Date: 2019-04-02
GUANGDONG ESQUEL TEXTILES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] After the cotton fiber is modified by cationic reagents, the cotton fiber is positively charged, and the negatively charged dye can be adsorbed onto the fiber by Coulomb force, which greatly improves the dye uptake rate. When the cellulose fiber is modified, the cationic modification needs to be treated separately, and the cationic modification needs to be washed and neutralized before dyeing can be carried out; therefore, there are many operation steps in the existing cationic modification treatment, and the operation is cumbersome. The shortcomings of time-consuming and water-consuming are inconsistent with the current trend of energy-saving and water-saving in the textile industry

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] The present embodiment provides a kind of method that improves the dyeing utilization rate of reactive dyestuff, and this method comprises the following steps:

[0032] In the dyeing machine, the reactive dye Black B (produced by Taiwan Yongguang Chemical Industry Co., Ltd.) was used to dye the pure cotton knitted fabric, wherein the amount of reactive dye was 5% (o.w.f); the liquor ratio was 1:8.

[0033] Under normal temperature conditions, first add reactive dyes to the dyeing machine and then run for 5 minutes, then add sodium sulfate (in terms of the volume of the dyeing solution, the concentration of sodium sulfate added is 60g / L), when adding sodium sulfate , control the addition of Yuanming powder at a uniform speed within 10min; then heat up the dyeing machine to 60°C at a heating rate of 2°C / min, and add sodium carbonate thereto after running for 20min (in terms of the volume of the dye solution, the amount of sodium carbonate added is Concentration is 20g / L),...

Embodiment 2

[0045] The present embodiment provides a kind of method that improves the dyeing utilization rate of reactive dyestuff, and this method comprises the following steps:

[0046] Preparation of high-temperature (80°C reaction-fixing) reactive dye dyeing solution, the reactive dyes used are EVE REDHE7B H / C (produced by Taiwan Yongguang Chemical Industry Co., Ltd.) and EVE YELLOW HE4R H / C (Taiwan Yongguang Chemical Industry Co., Ltd. Co., Ltd.), wherein, the amount of EVE RED HE7B H / C is 4.7% (o.w.f); the amount of EVE YELLOWHE4R H / C is 3.3% (o.w.f); the liquor ratio is 1:8.

[0047] Under normal temperature conditions, add dye to the dyeing machine and run for 5 minutes, then add sodium sulfate at a uniform speed within 10 minutes (based on the volume of the dyeing solution, the concentration of sodium sulfate added is 70g / L), and then dye at 2°C Raise the temperature of the dyeing agent to 80°C at a heating rate of / min, and add sodium carbonate to it after running for 20 minutes...

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Abstract

The invention provides a method for improving dyeing utilization rate of a reactive dye. The method comprises the following steps: putting a fabric into dye liquor, dyeing, directing adding a cationic modification agent and an accelerator into the dye liquor without discharging the dye liquor after the dyeing is finished, and then carrying out heat preservation treatment on the fabric; and carrying out aftertreatment on the fabric after the heat preservation treatment is finished, so that the dyed fabric is obtained, wherein the accelerator is potassium carbonate and / or sodium silicate. The technical scheme and technology which are provided by the invention are simple and practicable, the traditional reactive dye dyeing equipment does not need to be changed, individual cationic modification treatment operation does not need to be carried out on the fabric, the number of treatment cylinders is reduced, water consumption is reduced, and utilization rate of the reactive dye is obviously increased.

Description

technical field [0001] The invention relates to a method for improving the dyeing utilization rate of reactive dyes, belonging to the technical field of dyeing and finishing. Background technique [0002] Cellulosic fibers such as cotton are mainly dyed with reactive and direct dyes. Reactive dyes have bright color, complete chromatogram, mature dyeing process, good level dyeing property, and can form covalent bonds with most fibers, so their color fastness is very good when taken, and they become the first choice for cellulose fiber dyeing. However, there are low fixation rate and low utilization rate of dyestuff when dyeing with reactive dyes, especially when dyeing dark colors (dye concentration is greater than 3% o.w.f.), the fixation rate of dyestuff is generally about 40-80%, and dyestuff The higher the concentration, the lower the utilization rate of the dye, which not only causes the waste of the dye, but also increases the cost, and it is very difficult to treat th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/38D06P1/66D06P1/673D06P3/66
CPCD06P1/38D06P1/66D06P1/6735D06P1/67383D06P3/66
Inventor 陈新福张玉高
Owner GUANGDONG ESQUEL TEXTILES CO LTD
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