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CN-122013561-A - Salt-free short-process dyeing method for reactive dye

CN122013561ACN 122013561 ACN122013561 ACN 122013561ACN-122013561-A

Abstract

The invention relates to the technical field of reactive dye dyeing, in particular to a salt-free short-process dyeing method of reactive dye, which comprises the following steps of S1, carrying out one-bath material melting on reactive dye, an anti-migration agent and a color fixing agent to obtain a mixed working solution; S2, padding the fabric with the mixed working solution to obtain the padded fabric, and S3, sequentially drying, steaming, primary washing, soaping, secondary washing and ironing the padded fabric. The mixed working solution comprises the following components in mass concentration of 1-50g/L of reactive dye, 10-15g/L of anti-migration agent and 1-20g/L of color fixing agent. The dyeing method has the advantages of good dyeing depth, uniformity and fastness, low pollution, low energy consumption, low cost, high efficiency and the like, meets the industrial production requirement, and is suitable for popularization and application in the green printing and dyeing industry.

Inventors

  • SHENG SHOUXIANG
  • ZHANG MENGJIE
  • GUO DONGMEI
  • LI XINGHUA
  • SHA NINGNING
  • ZHOU JIANQIANG
  • SUN HONGYU
  • SHENG CHUNYING
  • LI CHUNGUANG
  • LV JIANPIN
  • Lv Huiwen
  • SUN YUTAO
  • Shi Lumei
  • YU SHIHUI

Assignees

  • 华纺股份有限公司
  • 滨州华纺工程技术研究院有限公司

Dates

Publication Date
20260512
Application Date
20260126

Claims (10)

  1. 1. A salt-free short-process dyeing method of reactive dye, which is characterized by comprising the following steps: S1, carrying out one-bath material melting on reactive dye, an anti-migration agent and a color fixing agent to obtain a mixed working solution; S2, padding the fabric with the mixed working solution to obtain the padded fabric; and S3, sequentially drying, steaming, primary washing, soaping, secondary washing and ironing the padded fabric.
  2. 2. A salt-free short-process dyeing method for reactive dyes according to claim 1, characterized in that in step S1, the mixed working solution comprises the following components in mass concentration of 1-50g/L of reactive dye, 10-15g/L of migration inhibitor and 1-20g/L of fixing agent.
  3. 3. The salt-free short-process dyeing method of reactive dye according to claim 2, wherein the color fixing agent is prepared by compounding sodium hydroxide and sodium silicate according to a mass ratio of 1:3-1:5.
  4. 4. A salt-free short-process dyeing method according to claim 1, characterized in that in step S2, the padding residual ratio is 50% -65%.
  5. 5. A salt-free short-process dyeing method according to claim 1, characterized in that in step S3, the drying temperature is 60-80 ℃.
  6. 6. A salt-free short-process dyeing method according to claim 1, characterized in that in step S3, the steaming temperature is 98-102 ℃ and the steaming time is 50-120S.
  7. 7. The salt-free short-process dyeing method of reactive dye according to claim 1, wherein in the step S3, the primary water washing is performed by normal-temperature water washing for 1-2min.
  8. 8. The salt-free short-process dyeing method for reactive dyes according to claim 1, wherein in the step S3, the soaping is carried out by adopting hot water at 95 ℃ and adding a soaping agent, the using amount of the soaping agent is 1-3g/L, and the soaping time is 1-2min.
  9. 9. The salt-free short-process dyeing method of reactive dye according to claim 1, wherein in the step S3, the secondary water washing is performed by normal-temperature water washing for 1-2min.
  10. 10. The salt-free short-process dyeing method of reactive dyes according to claim 1, wherein in the step S3, the fabric after the secondary washing treatment is ironed to obtain a dry dyed fabric finished product.

Description

Salt-free short-process dyeing method for reactive dye Technical Field The invention relates to the technical field of reactive dye dyeing, in particular to a salt-free short-process dyeing method of reactive dye. Background The reactive dye dyeing technology is widely applied to cellulose fibers such as cotton, hemp, viscose, modal, tencel and the like, and is characterized in that covalent bond bonding is formed between dye molecules and the fibers, so that high color fastness and vividness are realized. The reactive dye has the characteristics of bright color, complete color spectrum, low raw material cost, good level dyeing property, strong applicability, excellent washing fastness of dyed fabrics and the like, and becomes the most main dye for dyeing and printing cellulose fiber fabrics. At present, the conventional reactive dye dyeing process of the cellulose fiber fabric comprises two main processes of intermittent dip dyeing and continuous pad-drying pad-steaming dyeing, and a large amount of salt and alkali are generally required to be added for dyeing promotion and fixation, so that the problems of low dye fixation rate, long dyeing flow, high energy consumption and water consumption, unstable cloth cover quality and the like exist, and particularly the high-salt wastewater treatment difficulty is high, so that the key for restricting the green development of the printing and dyeing industry is urgent to develop a novel reactive dye dyeing process. In order to solve the technical problems that a large amount of inorganic salt and alkali are required to be consumed in reactive dye dyeing, the dyeing process is long, and the dyeing quality of the cloth cover is poor, in recent years, the reactive dyeing without salt or with less salt is realized by domestic and foreign personnel through the aspects of process flow optimization, application of a novel color fixing agent and the like. However, the prior art has obvious defects that the salt consumption is reduced in part of the process, but the dyeing depth is insufficient, and the problems of difficult material melting, poor leveling property and the like of part of novel color fixing agents are solved, so that the industrial large-scale production requirement is difficult to meet. The Chinese patent document with the application number 201811644200.5 discloses a wet steaming salt-free dyeing process of a cellulose fiber fabric, and introduces a method for dyeing a reactive dye by using a proportion pump, which comprises the following steps of (1) padding dye and a color fixing agent mixed solution, (2) steaming for color fixing, and (3) washing, wherein the method is a wet steaming salt-free process, and has the problem of low dyeing depth. The Chinese patent document with the application number 201711116090.0 discloses a method for dyeing fabrics by utilizing a high molecular material, and is characterized in that a special color fixing agent is adopted in dyeing, and comprises the following raw materials, by weight, 700-800 parts of sodium metasilicate pentahydrate, 200-300 parts of urea and 1-5 parts of sodium dodecyl benzene sulfonate, but the problems that the color fixing agent is a high molecular material and is difficult to dissolve, poor in affinity with water, easy to generate streaks and stains on the cloth surface after dyeing and the like are existed. Disclosure of Invention In order to solve the problems, the invention provides a salt-free short-process dyeing method for reactive dyes. The small molecular color fixing agent is adopted to realize the salt-free high-efficiency dyeing by padding the fabric after the dye is subjected to the same bath with the reactive dye and combining the short process of rolling, baking and steaming. The reactive dye and the color fixing agent are subjected to one-bath material melting, the color fixing agent and the reactive dye are subjected to one-bath dyeing, the reactive dye can form a strong electrophilic center through steaming, meanwhile, cellulose fibers form nucleophilic cellulose oxyanions, the covalent bonds between the reactive dye and the cellulose oxyanions are improved, the effect of fixing colors by using a large amount of caustic soda, sodium carbonate and salt in the steaming process of the reactive dye is avoided, the pollution in the washing process is reduced, the burden of sewage treatment is reduced, and the method is energy-saving and environment-friendly and is suitable for shallow, medium and deep dyeing of cellulose fiber fabrics. The technical scheme of the invention is as follows: the invention provides a salt-free short-process dyeing method of reactive dye, which comprises the following steps: S1, carrying out one-bath material melting on reactive dye, an anti-migration agent and a color fixing agent to obtain a mixed working solution; S2, padding the fabric with the mixed working solution to obtain the padded fabric; and S3, sequentially drying, steaming, primary washing,