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Method for cationic modification and salt-free dyeing of cellulose fiber fabric

A technology of cellulose fiber and cationic modifier, applied in the direction of dyeing, fiber treatment, plant fiber, etc., can solve the problems of color pattern, color sink, ring dyeing, etc., to improve the permeability, uniformity, color fastness, etc. Good, easy and controllable dyeing operation

Active Publication Date: 2016-07-06
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for solving the problems of color flower, ring dyeing and color sinking in the salt-free dyeing of cellulose fiber fabric modified by polymer cationic agent

Method used

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  • Method for cationic modification and salt-free dyeing of cellulose fiber fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Salt-free and low-alkali dyeing of cotton knitted fabrics. The specific steps are:

[0019] (1) Modification of cotton knitted fabric: the modifier is cationic starch and polyepichlorohydrin-dimethylamine, the mass ratio of the two is 7:3, and the concentration is 12g / L prepared with soft water, according to the liquor ratio The ratio is 1:10. After mixing evenly, add pure cotton cloth to it, and then add NaOH, the concentration of which is 1.8g / L. Apply a pressure of 0.4MPa, raise the temperature to 75°C at a heating rate of 1.0°C / min, and react at a constant temperature for 30 minutes. After the pressure is released and the temperature drops below 60°C, the modifying liquid is discharged, washed with water until the pH value of the discharged liquid is 7.5, and a cationic modified cotton fabric is obtained.

[0020] (2) Dyeing: Arrange the modified cotton prepared in (1) in the dyeing machine, add soft water, the bath ratio is 1:10, dissolve the dye with backflow wa...

Embodiment 2

[0025] Salt-free and low-alkali dyeing of cotton / modal knitted fabrics. The specific steps are:

[0026] (1) Modification of cotton / modal (60 / 40) plain weave fabric: the modifier is cationic polyacrylamide, which is prepared with soft water to a concentration of 6g / L and a bath ratio of 1:18. After mixing evenly, add the fabric to it. Apply a pressure of 0.5MPa, raise the temperature to 70°C at a heating rate of 1.0°C / min, and react at a constant temperature for 40 minutes. Release the pressure, lower the temperature to below 60°C and discharge the modified liquid, wash with water until the pH value of the discharged liquid is 7, and obtain a cationic modified cotton / modal fabric.

[0027] (2) Dyeing: Arrange the modified cotton / modal fabric prepared in (1) in the dyeing machine, add soft water, the bath ratio is 1:7, dissolve the dye with reflux water and inject it into the dyeing machine, the dye prescription is: active Yellow HF-4GL150%: 0.8% owf, active turquoise FG150%:...

Embodiment 3

[0032]Salt-free and low-alkali dyeing of all-tencel plain weave. The specific steps are:

[0033] (1) Modification of all-tencel plain weave fabric: the modifier is polyepichlorohydrin-dimethylamine, which is prepared with soft water to a concentration of 3g / L and a bath ratio of 1:15. After mixing evenly, add the fabric to it. NaOH was then added at a concentration of 1.5 g / L. Apply a pressure of 0.3MPa, raise the temperature to 85°C at a heating rate of 1.5°C / min, and react at a constant temperature for 25 minutes. Release the pressure, lower the temperature to below 60°C and discharge the modified liquid, wash with water until the pH of the discharged liquid is 8, and obtain a cationic modified Tencel fabric.

[0034] (2) Dyeing: Put the modified Tencel fabric prepared in (1) in a dyeing machine, add soft water, the bath ratio is 1:10, dissolve the dye with backflow water and inject it into the dyeing machine, the dye prescription is: reactive yellow HF-4GL150%: 0.22% ow...

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Abstract

The invention discloses a method for cationic modification and salt-free dyeing of cellulose fiber fabrics. The method is as follows: prepare an aqueous solution of a polymer cationic modifier with soft water, add cellulose fiber fabrics, add NaOH, apply pressure, heat up, and react at a constant temperature , lower the temperature and relieve the pressure, discharge the modified liquid, wash with water, and obtain the cationic modified fabric; place the cationic modified fabric in the dyeing machine, add soft water, dissolve reactive dyes and soda ash in turn with backflow water, inject the dyeing machine, and raise the temperature to The dyeing temperature is constant, and the dyeing residue is discharged. The fabric is washed-soaped-washed, dehydrated, and dried to obtain a salt-free and low-alkali dyed fabric. The invention realizes salt-free and low-alkali dyeing, solves the disadvantages of color flower, color sinking, ring dyeing, and reduced color fastness in the dyeing of reactive dyes of cellulose fiber fabrics modified by polymer cationic agents, and does not need to add leveling agent and soda ash during dyeing. It can be added to the dye vat at the same time as the dye, so there is no need to add soda ash several times during the dyeing process, and the dyeing operation is simple and easy to control.

Description

technical field [0001] The invention belongs to the field of salt-free dyeing of cellulose fiber fabrics with reactive dyes, in particular to a method for cationic modification and salt-free dyeing of cellulose fiber fabrics. technical background [0002] Reactive dyes are the most widely used dyes in the dyeing of cellulose fiber fabrics. However, in the process of dyeing cellulose fiber fabrics with reactive dyes, in order to overcome the charge barrier when the fibers absorb dyes, it is necessary to add a large amount of inorganic salts. According to different color depth requirements, the salt concentration is about 40-150g / L. At present, the treatment methods and technologies for organic matter in printing and dyeing wastewater are mature, but the treatment of inorganic salts has always been a major problem in the industry. A large number of inorganic salts that are difficult to recover and cannot be degraded are discharged into rivers and lakes, seriously polluting wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/38D06P1/673D06P3/66D06M15/11D06M15/53D06M15/59D06M15/285D06M15/356D06M15/61D06M101/06
Inventor 刘维锦张新文李冬梅谭美贤苏晓樱
Owner SOUTH CHINA UNIV OF TECH
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