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Salt-free low-alkali dyeing method for cellulosic fibers

A technology of cellulose fiber and dyeing method, which is applied in dyeing method, textiles and papermaking, etc. It can solve the problems of large amount of alkali consumption, difficult treatment of waste water, pollution, etc., and achieve the effect of uniform dyeing, uniform modification and sufficient modification

Pending Publication Date: 2015-03-25
HMEI THREAD CO LTD OF YINBIN SICHUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The present invention aims to solve the following problems in the process of dyeing the cellulose fibers after modification in order to reduce the consumption of dyes, inorganic salts and alkali in the prior art: The degree of pollution is high, and the discharged wastewater is difficult to treat, causing pollution; and the existing salt-free and low-alkali modified dyeing process cannot be applied to large-scale industrial production

Method used

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  • Salt-free low-alkali dyeing method for cellulosic fibers
  • Salt-free low-alkali dyeing method for cellulosic fibers
  • Salt-free low-alkali dyeing method for cellulosic fibers

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Effect test

Embodiment 1

[0078] Cellulose fiber dyeing process:

[0079] A salt-free and low-alkali dyeing method for cellulose fibers, comprising the following process steps:

[0080] A. Cellulose fiber modification treatment

[0081] Put the cellulose fiber into the container, add water to the container, and then modify the cellulose fiber with two cationic modifiers, the small molecule quaternary ammonium salt cationic modifier and the high molecular quaternary ammonium salt cationic modifier , modified cellulose fibers are obtained after the modification treatment is completed; the small molecular quaternary ammonium salt cationic modifier is 3-acrylamide-2-hydroxypropyl trimethyl ammonium chloride, and the high molecular quaternary ammonium The salt cationic modifier is polyamide polyamine epichlorohydrin;

[0082] B. Washing treatment

[0083] Washing the modified cellulose fibers obtained through the modification treatment in step A;

[0084] C. Dyeing

[0085] Putting the modified cellulo...

Embodiment 2

[0090] Cellulose fiber dyeing process:

[0091] A salt-free and low-alkali dyeing method for cellulose fibers, comprising the following process steps:

[0092] A. Cellulose fiber modification treatment

[0093] Put the cellulose fiber into the container, add water to the container, and then modify the cellulose fiber with two cationic modifiers, the small molecule quaternary ammonium salt cationic modifier and the high molecular quaternary ammonium salt cationic modifier , modified cellulose fibers are obtained after the modification treatment is completed; the small molecular quaternary ammonium salt cationic modifier is 3-acrylamide-2-hydroxypropyl trimethyl ammonium chloride, and the high molecular quaternary ammonium The salt cationic modifier is polyamide polyamine epichlorohydrin;

[0094] B. Washing treatment

[0095] Washing the modified cellulose fibers obtained through the modification treatment in step A;

[0096] C. Dyeing

[0097] Putting the modified cellulo...

Embodiment 3

[0103] The small molecule quaternary ammonium salt cationic modifier of the present invention is 3-acrylamide-2-hydroxypropyl trimethyl ammonium chloride;

[0104] The polymer quaternary ammonium salt cationic modifier of the present invention is polyamide polyamine epichlorohydrin.

[0105] 3-acrylamide-2-hydroxypropyltrimethylammonium chloride:

[0106]

[0107] Polyamide polyamine epichlorohydrin:

[0108]

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Abstract

The invention relates to a salt-free low-alkali dyeing method for cellulosic fibers and belongs to the technical field of textile dyeing. The salt-free low-alkali dyeing method comprises the steps of modification treatment, water processing, dyeing and aftertreatment of the cellulosic fibers, wherein in the modification treatment of the cellulosic fibers, 3-acrylamide-2-hydroxypropyltrimonium and polyamide polyamine epichlorohydrin are adopted for carrying out modification treatment on the cellulosic fibers. According to the salt-free low-alkali dyeing method, two specific modifiers are adopted and the synergistic effect of the two modifiers is used cooperatively with the specific dyeing step, so that salt-free low-alkali dyeing of the cellulosic fibers is realized in the dyeing process, pollution is reduced and the cost is reduced; moreover, the process is simplified; difficulty is reduced; modifying and dyeing effects are good; and the salt-free low-alkali dyeing method is suitable for industrial mass production.

Description

technical field [0001] The invention relates to a dyeing method of cellulose fibers, more specifically, the invention relates to a salt-free and low-alkali dyeing method of cellulose fibers, which belongs to the technical field of textile dyeing. Background technique [0002] The dye uptake rate of traditional cellulose fiber dyeing process is generally around 40-70%. The dye uptake rate is low and there are many floating colors. In order to achieve the purpose of color fixation, the hydroxyl groups on the cellulose need to be ionized under strong alkaline conditions, so a large amount of soda ash must be added to the dyeing solution in the later stage of dyeing. The treatment of inorganic salts and alkalis has always been a problem that plagues the industry. A large amount of inorganic salts that are neither recyclable nor degradable are discharged into rivers and lakes, seriously polluting water quality. Due to the high permeability of salt, the surrounding soil is saliniz...

Claims

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Application Information

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IPC IPC(8): D06P1/66D06P1/52D06P3/60D06P5/22
Inventor 廖周荣段太刚贾卫平何大雄汤伟黄金洪张海刘志军
Owner HMEI THREAD CO LTD OF YINBIN SICHUAN
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