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

A technology of cellulose fibers and cationic modifiers, applied in dyeing, fiber treatment, plant fibers, etc., can solve problems such as ring dyeing, color flowering, color sinking, etc., and improve permeability, uniformity, and color fastness Good, easy to control the effect of dyeing operation

Active Publication Date: 2014-12-24
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 cation 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 cation modification and salt-free dyeing of a cellulose fiber fabric. The method comprises the steps as follows: preparing a high-polymer cation modifier aqueous solution with soft water, adding the cellulose fiber fabric, then adding NaOH, exerting pressure, heating the solution for a thermostatic reaction, performing cooling and pressure relief, discharging the modifying solution, and performing washing to obtain a cation-modified fabric; placing the cation-modified fabric in a dyeing machine, adding the soft water, sequentially dissolving reactive dye and sodium carbonate with return water, injecting the reactive dye and the sodium carbonate into the dyeing machine, heating the dyeing machine to the dyeing temperature, keeping the temperature, discharging a residual dyeing solution, and dehydrating and drying the fabric after a washing-soaping-washing process to obtain the salt-free low-alkaline dyed fabric. With the adoption of the method, salt-free low-alkali dyeing is realized, the problems of dyeing defects, color sinking and ring dyeing as well as reduction of the color fastness when cellulose fiber fabrics modified by high-polymer cation modifiers are dyed with reactive dyes are solved, a leveling agent is not required to be added during dyeing, the sodium carbonate and the dye can be added into a dyeing vat simultaneously, the sodium carbonate is not required to be added repeatedly during dyeing, 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 Applications(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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