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Low-salt dyeing method of reactive dye

A technology of reactive dyes and dyeing methods, applied in the field of full-bath pre-modification of cellulose fibers and low-salt dyeing, which can solve the problem of limited salt consumption of reactive dyes in ultrasonic dyeing machines, impossibility of industrial application, and stable dyeing effect Poor performance and other problems, achieve the effect of small modification effect, increase K/S value, and inhibit hydrolysis

Active Publication Date: 2020-04-14
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, practice has proved that this method requires a large investment in related dyeing equipment, and the production efficiency is very low, and the stability of the dyeing effect is poor.
At the same time, the effect of ultrasonic dyeing machine on reducing the amount of salt used in reactive dyes is very limited, it is difficult to play a role alone, and industrial application cannot be realized in the short term

Method used

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  • Low-salt dyeing method of reactive dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The raw materials for this dyeing process include:

[0048] 1. Fabric to be dyed: pure cotton bleached cloth 1000g

[0049] 2. Reactive dye: Huntsman NOVACRON DEEP NIGHT S-R 20g

[0050] 3. Neutral electrolyte: 200g of anhydrous sodium sulfate (ie 20g / L)

[0051] 4. Inorganic base: sodium carbonate 130g (ie 13g / L)

[0052] 5. Fiber modifier: with 2 C 12 Fatty long chain diquaternary ammonium salt 4g

[0053] 6. Demineralized water: the total hardness is 25ppmCaCO 3 Soft water 10000g

[0054] The specific steps of the dyeing process:

[0055] (1) The step of pretreatment of cotton textiles to be dyed: in this step, the cotton textiles to be dyed, demineralized water, fiber modifier, and pH regulator are mixed, and the cotton textiles to be dyed are modified to obtain modified cotton textiles to be dyed ,Specifically:

[0056] (1.1) Put 90wt% of the total amount of demineralized water and the fiber modifier into the dyeing machine, adjust the pH to 4.5, put into t...

Embodiment 2

[0068] The raw materials for this dyeing process include:

[0069] 1. Fabric to be dyed: pure cotton bleached cloth 1000g

[0070] 2. Reactive dye: reactive brilliant blue KN-R 40g

[0071] 3. Neutral electrolyte: anhydrous sodium sulfate 300g (ie 30g / L)

[0072] 4. Inorganic base: sodium carbonate 160g (ie 16g / L)

[0073] 5. Fiber modifier: with 2 C 12 Fatty long chain diquaternary ammonium salt 5.5g

[0074] 6. Demineralized water: the total hardness is 25ppmCaCO 3 Soft water 10000g

[0075] The specific steps of the dyeing process:

[0076] (1) The step of pretreatment of cotton textiles to be dyed: in this step, the cotton textiles to be dyed, demineralized water, fiber modifier, and pH regulator are mixed, and the cotton textiles to be dyed are modified to obtain modified cotton textiles to be dyed ,Specifically:

[0077] (1.1) Put 90wt% of the total amount of demineralized water and the fiber modifier into the dyeing machine, adjust the pH to 5, put into the cott...

Embodiment 3

[0089] The raw materials for this dyeing process include:

[0090] 1. Fabric to be dyed: pure cotton bleached cloth 1000g

[0091] 2. Reactive dye: reactive black RGB 60g

[0092] 3. Neutral electrolyte: 400g of anhydrous sodium sulfate (ie 40g / L)

[0093] 4. Inorganic base: sodium carbonate 190g (ie 19g / L)

[0094] 5. Fiber modifier: with 1 C 10 Fatty long chain monoquaternary ammonium salt 6g

[0095] 6. Demineralized water: the total hardness is 25ppmCaCO 3 Soft water 10000g

[0096] The specific steps of the dyeing process:

[0097] (1) The step of pretreatment of cotton textiles to be dyed: in this step, the cotton textiles to be dyed, demineralized water, fiber modifier, and pH regulator are mixed, and the cotton textiles to be dyed are modified to obtain modified cotton textiles to be dyed ,Specifically:

[0098] (1.1) Put 90wt% of the total amount of demineralized water and fiber modifier into the dyeing machine, adjust the pH to 4.5-5, put into the cotton textil...

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Abstract

The invention relates to a low-salt dyeing method of a reactive dye. The dyeing method does not change the conventional dyeing equipment and basic dyeing process of cotton textiles, and is easy to implement and control. Compared with a traditional dyeing method of a reactive dye to cotton textiles, the dyeing method can reduce the dosage of a dyeing electrolyte by 50% or above, and the cotton textile dyed by adopting the low-salt dyeing method of the reactive dye disclosed by the invention has obviously higher color rendering depth, high dyeing fastness and excellent dyeing reproducibility, and can be used for reactive dye dyeing processing of various cotton fibers and products thereof, so that the use amount of the dyeing electrolyte is remarkably reduced, the environment is protected, and the dyeing method has good application effect and bright market prospect.

Description

technical field [0001] The invention relates to a low-salt dyeing method for reactive dyes on cellulose fibers or blended fabrics mainly composed of cellulose fibers, in particular to a full-bath pre-modification of cellulose fibers and a low-salt dyeing method thereof. Background technique [0002] In production practice, reactive dyes are the most commonly used dyes for dyeing cellulose fiber textiles, among which vinyl sulfone or fluorine-containing heterocyclic reactive dyes are the most widely used. However, due to the small molecular structure of reactive dyes, strong water solubility, and weak affinity with fibers, they have to rely on a large amount of neutral electrolytes to promote dyeing during the dyeing process. In order to solve the environmental pollution problems caused by the traditional high-salt dyeing process of reactive dyes, the low-salt dyeing technology of reactive dyes has always been the focus of research and development in related fields. At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/38D06P1/66D06P1/673D06P3/66
CPCD06P1/38D06P1/66D06P1/6735D06P3/66
Inventor 权衡王佳刘挺刘希萌倪丽杰李时伟李青
Owner WUHAN TEXTILE UNIV
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