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Novel reactive dye solvent dyeing method with energy-saving and time-saving effects

A reactive dye and solvent dyeing technology, applied in the field of textile dyeing and finishing, can solve the problems of fast dyeing speed, large amount of surfactant and co-surfactant, high COD value of soaping wastewater, and achieve the effect of improving level dyeing

Active Publication Date: 2018-12-18
GUANGDONG ESQUEL TEXTILES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reverse micellar dyeing process has the following problems: 1. The amount of surfactant and co-surfactant in the system is relatively large, and the amount of a large amount of surfactant and auxiliary agent will cause a large amount of surface adsorption on the cloth sample during the dyeing process. Active agents and additives will also cause post-processing difficulties, high COD value of soaping wastewater, environmental pollution and waste of resources
2. Due to the high affinity of the high-concentration dye aqueous solution dispersed in the solvent system to the fiber, the dyeing speed is fast, it is not easy to control, and it is easy to dye flowers.
3. When dyeing, the cotton fiber first needs to be padded with a certain concentration of sodium carbonate aqueous solution, and dyed with a certain liquid rate. The water in the system will also cause the hydrolysis of the dye, so its color fixation rate is low.
Moreover, the reaction speed of dyes to alkalization is very fast, and the reaction speed of reactive dyes cannot be controlled by slowly adding alkali like in water medium, so the dyeing rate is not easy to control, resulting in easy dyeing, and the pre-alkali drying process is more cumbersome , time-consuming and additional energy is required for drying

Method used

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  • Novel reactive dye solvent dyeing method with energy-saving and time-saving effects
  • Novel reactive dye solvent dyeing method with energy-saving and time-saving effects
  • Novel reactive dye solvent dyeing method with energy-saving and time-saving effects

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This embodiment provides a new method for energy-saving and time-saving reactive dye solvent dyeing, which comprises the following steps:

[0030] Put 10g of pure cotton knitted fabric in a dyeing cup, add 0.3g (3% o.m.f) Avitera Red SE dye, 40mL of dimethyl sulfoxide, and dye at 35°C. Slow first and then fast within 60min (the first 30min straight line Add 2mL DBU dimethyl sulfoxide solution, then add 8mL DBU dimethyl sulfoxide solution in a straight line for 30min, add 0.5g DBU (dissolved in 10mL dimethyl sulfoxide), and heat up at 1°C / min Slowly raise the temperature, slowly add 150mL of tetrachlorethylene during the heating process, raise the temperature to 98°C and keep it for 2h;

[0031] Take out the dyed knitted fabric sample, dry it and recover the solvent, wash the fabric sample with acetic acid solution with a concentration of 1g / L at room temperature for 10min at a bath ratio of 1:10, then soap at 98°C once at a bath ratio of 1:10, and then Then wash twice wi...

Embodiment 2

[0036] This embodiment provides a new method for energy-saving and time-saving reactive dye solvent dyeing, which comprises the following steps:

[0037] Put 10g of cotton / linen (60% cotton +40% linen) blended knitted fabric in a dyeing cup, add 0.3g (3% o.m.f) Novacron Super Black G dye, 30mL N,N-dimethylacetamide, Dyeing at 35°C, slowly heating up at a heating rate of 1°C / min, slowly adding 300mL of n-heptane and 0.8g of tetramethylammonium hydroxide (dissolved in 10mL of N,N-dimethylacetamide) during the heating process , within 45min in a slow and fast manner (add 1mL of tetramethylamine hydroxide in N,N-dimethylacetamide solution in a straight line for the first 22.5min, then add 9mL of tetramethylamine hydroxide in N,N-dimethylacetamide solution in a straight line for another 22.5min -Dimethylacetamide solution) was added, and the temperature was raised to 110° C. for 2 h.

[0038] Take out the dyed knitted fabric sample, dry it and recover the solvent, wash the fabric ...

Embodiment 3

[0043] This embodiment provides a new method for energy-saving and time-saving reactive dye solvent dyeing, which comprises the following steps:

[0044] Put 10g of cotton / nylon (70% cotton + 30% nylon) blended knitted fabric in a dyeing cup, add 0.3g (3% o.m.f) Novacron Yellow S-3R dye, 30mL of N,N-dimethylformamide , into the dyeing at 35°C, slowly increase the temperature at a rate of 1°C / min, slowly add 300mL of n-hexane during the heating process, after the completion of the addition of n-hexane, it will start slowly and then quickly (in the first 15min, add 3mL of potassium tert-butoxide in a straight line of N, N-dimethylformamide solution, followed by linear addition of 7 mL of potassium tert-butoxide in N,N-dimethylformamide solution for 15 min) and 0.3 g of potassium tert-butoxide (dissolved in 10 mL of N,N-dimethylformamide ) and finished adding within 30min, then heated up to 110°C for 2h;

[0045] Take out the dyed knitted fabric sample, dry it and recover the so...

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Abstract

The invention provides a novel reactive dye solvent dyeing method with energy-saving and time-saving effects. The method comprises: mixing loose fibers, yarn, a fabric or a good solvent for a garmentand a reactive dye to obtain a mixed system, heating the mixed system to a dyeing temperature, wherein before heating or in heating, a poor solvent of the reactive dye is added into the mixed system,carrying out heat preservation, wherein before poor solvent use or in poor solvent feeding or after poor solvent use, a soluble strong alkali or its solution dissolved in the good solvent is fed in 10-60min at a slow feeding rate in the first stage and a fast feeding rate in the latter stage, and neutralizing, washing and drying the dyed material subjected to heat preservation to obtain a dyed finished product. The soluble alkali is used in the solvent dyeing process. The addition time and the addition speed are selected according to demands so that the leveling property of the dyeing is improved.

Description

technical field [0001] The invention relates to a new dyeing method of reactive dyes, in particular to a new energy-saving and time-saving reactive dye solvent dyeing method, which belongs to the technical field of textile dyeing and finishing. Background technique [0002] At present, reactive dyes are mostly used in the dyeing of reactive fibers. During the dyeing process, due to the hydrolysis of the active groups in the water medium, not only a large amount of reactive dyes are wasted, but also a large amount of water is consumed during the dyeing process and a large amount of high Chroma sewage, which is an insurmountable bottleneck for reactive dyes. [0003] In order to avoid the hydrolysis reaction of reactive dyes and improve the utilization rate of reactive dyes, scientists have paid attention to and studied the dyeing of reactive dyes in non-aqueous media very early. The advantage of using non-aqueous medium dyeing is that reactive dyes will not be hydrolyzed dur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/38D06P3/60D06P1/92D06P3/85
CPCD06P1/38D06P1/92D06P1/922D06P3/60D06P3/8219
Inventor 陈新福陈玉洪俞晓强张玉高
Owner GUANGDONG ESQUEL TEXTILES CO LTD