Reactive dye cosolvent staining method for cellulose fabric

A technology of cellulose fabrics and reactive dyes, applied in the field of co-solvent dyeing of reactive dyes, can solve the problems of poor color penetration and level dyeing, limited solubility, etc., achieve improved dyeing rate and color fixation rate, and short production process , easy-to-operate effects

Inactive Publication Date: 2013-08-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The improvement method of organic solvent solution dyeing also includes alkali, water and polar organic solvent pre-swelling method, which can improve the dye uptake rate and color fixation rate of the dye, but due to the limited solubility in the dye bath, the coloring is faster and the penetration is faster. It can also be dyed in DMF first, and then add trichlorethylene in batches to gradually reduce the solubility of the dye to improve the permeability, but this also affects the solubility of the dye in organic solvents. made higher demands
Generally speaking, there is no suitable organic solvent dyeing method for cellulose fibers at present. Finding and developing energy-efficient reactive dye organic solvent dyeing methods for cellulose fabrics is of great importance for reducing the discharge of dyeing wastewater and realizing clean dyeing of cellulose fabrics. the meaning of

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 5mL4g / L Reactive Brilliant Red KE-7B (C.I. Reactive Red 141), 5mL ethanol and 1g cotton fabric to a 50mL beaker, raise the temperature to 60°C at 3°C / min and keep it warm for 30min, add 15mL ethanol and 1mL100g / L soda ash Raise the temperature at 1°C / min to 78°C and keep it warm for 60 minutes, take out the fabric, and wash, soap, and wash with water to obtain the finished dyed cotton fabric. The dye uptake rate can reach 96%, and the fixation rate is 79%.

Embodiment 2

[0025] Add 10mL of 4g / L reactive dark blue M-2GE (C.I. reactive blue 194), 10mL of ethyl acetate-acetone co-solvent with a volume ratio of 1:1 and 2g of cotton fabric in a 50mL conical flask, and heat up to 50°C at 3°C / min And keep it warm for 10 minutes, add 10mL of ethyl acetate-acetone co-solvent with a volume ratio of 1:1, 0.2g of soda ash, then raise the temperature to reflux state at 1°C / min and keep it warm for 60 minutes, take out the fabric, wash it with water, soap and water. The dyed cotton fabric is obtained. The dye uptake rate is 94%, and the fixation rate is 70%.

Embodiment 3

[0027] Add 6mL6g / L reactive black KN-B (C.I. reactive black 5), 5mL isopropanol and 2g hemp fabric into a 50mL beaker, raise the temperature to 70°C at 3°C / min and keep it warm for 30min, add 10mL isopropanol and 2mL100g / L soda ash Raise the temperature at 1°C / min to 100°C and keep it warm for 30 minutes, take out the fabric, wash with water, soap and wash with water to get the dyed cotton fabric. The dye uptake rate is 98%, and the fixation rate is 85%.

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Abstract

The invention relates to a reactive dye cosolvent staining method for a cellulose fabric. The method comprises the following steps of: adding a solvent into an aqueous solution of a reactive dye, thus obtaining a cosolvent solution of the dye; soaking the cellulose fabric in the dyeing solution under room temperature, and raising the temperature to the dyeing temperature of 40-100 DEG C; and adding the solvent and sodium carbonate, raising the temperature to the fixation temperature of 40-100 DEG C, keeping the temperature for 30-60 minutes, taking the fabric out, and washing, soaping and washing to obtain the product. The method is simple, is easily industrialized, can obtain higher dye-uptake and higher fixation rate compared with the traditional reactive dye staining process, and has high leveling property.

Description

technical field [0001] The invention belongs to the field of reactive dye dyeing, in particular to a reactive dye co-solvent dyeing method for cellulose fabrics. Background technique [0002] Clean dyeing technology with high efficiency, energy saving and emission reduction is the mainstream trend of reactive dye dyeing today, mainly including low alkali and neutral, low salt and no salt, low temperature and cold pad batch, wet short steaming, small liquor ratio, non-aqueous medium and other new dyeing techniques. Among them, low-alkali and neutral dyeing need to rely on other auxiliaries, reaction media or cellulose modification to improve the reaction speed of reactive dyes and fibers; low-salt and salt-free dyeing requires the development of new dyes and new auxiliaries, cellulose modification. The low-temperature and cold pad-batch dyeing has difficulties such as long dyeing time, difficult control of reproducibility, difficulty in fast proofing and lofting, and relativ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/90D06P1/38D06P3/66
Inventor 何瑾馨杭彩云董霞周浩
Owner DONGHUA UNIV
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