阅读说明：本技术 一种无臭味黑色牛仔布染色工艺 (Odorless black jean dyeing process ) 是由 陆惠芬 黄学婷 邓朝辉 钟桂华 邓德强 伍焕华 于 2020-05-26 设计创作，主要内容包括：本发明公开了一种无臭味黑色牛仔布染色工艺,包括由浆染联合机一步连续完成的原纱经轴润湿步骤、染色步骤、水洗步骤、固色步骤、防脆步骤、烘干上浆步骤和分绞卷取步骤,其中,所述染色步骤是在温度90-98℃的条件下,采用染色底液浸染经纱,所述染色底液包括如下成分：硫化黑95-105g/L、新型复合还原剂25-35g/L、耐碱渗透剂1-5g/L、太古油1-5g/L、烧碱25-35g/L。本发明牛仔布染色工艺中通过采用新型复合还原剂代替硫化钠,能够大大降低黑色牛仔布面料游离硫化物,使面料闻不到异臭味。后续制衣、洗水等生产产生的污水的COD指标下降76％以上,硫化物含量下降74％以上,单机台废气中硫化氢含量下降72％以上,氨含量下降91％以上,面料游离硫化物显著降低,完全闻不到异臭味。(The invention discloses an odorless black jean dyeing process, which comprises a raw yarn warp beam wetting step, a dyeing step, a water washing step, a color fixing step, an anti-brittleness step, a drying and sizing step and a leasing and reeling step which are continuously completed by a sizing and dyeing combination machine in one step, wherein the dyeing step is to dip-dye warp yarns by using dyeing base liquid at the temperature of 90-98 ℃, and the dyeing base liquid comprises the following components: 95-105g/L of sulfur black, 25-35g/L of novel composite reducing agent, 1-5g/L of alkali-resistant penetrating agent, 1-5g/L of Turkey red oil and 25-35g/L of caustic soda. In the denim dyeing process, the novel composite reducing agent is adopted to replace sodium sulfide, so that the free sulfide of the black denim fabric can be greatly reduced, and the fabric does not smell peculiar smell. The COD index of the sewage generated in the subsequent production of clothes making, water washing and the like is reduced by more than 76%, the sulfide content is reduced by more than 74%, the hydrogen sulfide content in the single machine waste gas is reduced by more than 72%, the ammonia content is reduced by more than 91%, the free sulfide of the fabric is obviously reduced, and no peculiar smell is smelled.)

1. The dyeing process of the odorless black jean is characterized by comprising a raw yarn warp beam wetting step, a dyeing step, a water washing step, a color fixing step, an anti-brittleness step, a drying and sizing step and a leasing and reeling step which are continuously completed by a sizing and dyeing combination machine in one step, wherein the dyeing step is to dip-dye warp yarns by using a dyeing base solution at the temperature of 90-98 ℃, and the dyeing base solution comprises the following components: 95-105g/L of sulfur black, 25-35g/L of novel composite reducing agent, 1-5g/L of alkali-resistant penetrating agent, 1-5g/L of Turkey red oil and 25-35g/L of caustic soda.

2. The odorless black denim dyeing process according to claim 1, wherein the novel composite reducing agent comprises the following components in percentage by mass: 30-75 wt% of thiourea dioxide, 20-60 wt% of reducing sugar and 5-20 wt% of chemical potential control agent.

3. The odorless black denim dyeing process according to claim 2, wherein the reducing sugar is one or a mixture of glucose and sucrose; the chemical potential control agent is at least one of sodium nitrite, acrylamide, furfural, cyclohexanone and trichloroacetic acid.

4. The odorless black denim dyeing process according to claim 1, wherein the step of wetting the warp beams of the raw yarns is to dip and wash the warp yarns with a treatment base solution, and the temperature is 20-30 ℃.

5. The odorless black denim dyeing process according to claim 4, wherein the treatment base solution is an alkali-resistant penetrating agent, and the concentration of the alkali-resistant penetrating agent is 3-8 g/L.

6. The dyeing process of the odorless black denim according to claim 1, wherein the water washing step comprises one hot water washing and one normal temperature water washing, the temperature of the hot water washing is 55-60 ℃, and the temperature of the normal temperature water washing is 25 ℃.

7. The odorless black denim dyeing process according to claim 1, wherein the fixing step is to dip and wash warp yarns by using a fixing base solution, the fixing base solution is glacial acetic acid, and the concentration of the glacial acetic acid is 3-8 g/L.

8. The odorless black denim dyeing process according to claim 1, wherein the step of preventing brittleness is to dip and wash warp yarns with a brittleness-preventing base solution, the brittleness-preventing base solution is urea, and the concentration of the urea is 3-8 g/L.

9. The odorless black denim dyeing process according to any one of claims 1 to 8, further comprising a liquid supplementing step, wherein the liquid supplementing step comprises dyeing liquid supplementing, wetting liquid supplementing, color fixing liquid supplementing and anti-brittleness liquid supplementing, wherein the dyeing liquid supplementing is to supplement the dyeing liquid supplementing in the dyeing step in a circulating manner, the wetting liquid supplementing is to supplement the treatment liquid supplementing in the raw yarn warp beam wetting step in a circulating manner, the color fixing liquid supplementing is to supplement the color fixing liquid supplementing in the color fixing step in a circulating manner, and the anti-brittleness liquid supplementing is to supplement the anti-brittleness liquid supplementing in the anti-brittleness step in a circulating manner.

10. The odorless black denim dyeing process according to claim 9, wherein the dye supplement liquid comprises the following components: 190-210g/L of sulfur black, 50-70g/L of novel composite reducing agent, 4-8g/L of alkali-resistant penetrating agent, 4-8g/L of Turkey red oil and 50-70g/L of caustic soda; the treatment supplementary liquid is an alkali-resistant penetrating agent with the concentration of 6-10 g/L; the color fixing supplementary liquid is glacial acetic acid with the concentration of 22-28 g/L; the anti-brittleness supplementary liquid is urea with the concentration of 22-28 g/L.

Technical Field

The invention relates to the technical field of dyeing, in particular to a dyeing process of odorless black jean.

Background

The traditional dyeing process of black denim is to dye black sulfide on a dyeing and sizing combination machine, the reduction and dissolution of the black sulfide take sodium sulfide as a reducing agent, the sodium sulfide can release a large amount of hydrogen sulfide gas in the decomposition process, and the hydrogen sulfide gas is toxic and has heavy odor of eggs, thereby bringing great pollution to the production environment. The denim produced by the old process dyeing has high content of free sulfide in the fabric, and the fabric can emit strong hydrogen sulfide odor. Bringing great pollution to the subsequent clothes making and water washing procedures. Therefore, how to reduce the free sulfide of the black jean fabric, so that the fabric does not smell peculiar smell, and the sewage pollution generated by production is reduced is a problem to be solved urgently.

Disclosure of Invention

The invention aims to provide an odorless black jean dyeing process, and aims to solve the problems that free sulfides of black jean fabric are reduced, the fabric does not smell peculiar odor, and sewage pollution caused by production is reduced.

In order to achieve the above purpose, the invention provides the following technical scheme:

a dyeing process of odorless black jean cloth comprises a raw yarn warp beam wetting step, a dyeing step, a water washing step, a color fixing step, an anti-brittleness step, a drying and sizing step and a leasing and reeling step which are continuously completed by a sizing and dyeing combination machine in one step, wherein in the dyeing step, warp yarns are dip-dyed by using dyeing base liquid at the temperature of 90-98 ℃, and the dyeing base liquid comprises the following components: 95-105g/L of sulfur black, 25-35g/L of novel composite reducing agent, 1-5g/L of alkali-resistant penetrating agent, 1-5g/L of Turkey red oil and 25-35g/L of caustic soda.

The invention adopts the sizing and dyeing combined equipment to realize one-step continuous completion of dyeing and sizing the denim warp, and has the advantages of simple and reasonable process, stable warp quality, clean production site, less sewage discharge, energy conservation and low production cost. The sulfur black is a dye which can not be directly dissolved in water, and is oxidized into insoluble dye after being dyed so as to be fixed on the fiber; the novel composite reducing agent is white and odorless powder, the reducing power is strong, the material melting temperature is 60 degrees, the using amount is low, the using amount only needs one third of sodium sulfide, the reducing power of the novel composite reducing agent to sulfur black is strong, the using amount only needs one third of sodium sulfide, the cost is greatly saved, the novel composite reducing agent is adopted to replace the sodium sulfide, the content of free sulfides in the jean fabric can be remarkably reduced, the fabric is free from peculiar smell, and meanwhile, the sewage pollution generated in subsequent clothes making and water washing procedures is remarkably reduced. The alkali-resistant penetrating agent is beneficial to wetting and dissolving the dye, reduces the surface tension of water, and has the functions of emulsification, diffusion, defoaming and the like; the Taigu oil is an excellent penetrating agent, has strong penetrating action, can make dyed products black and soft in hand feeling, and can promote the dyeing degree of sulfur black in jean cloth and improve the dye uptake of the jean cloth by the alkali-resistant penetrating agent and the Taigu oil. Especially, the sulfur black, the novel composite reducing agent, the alkali-resistant penetrating agent and the Turkey red oil are compounded for use, and the dye has the characteristics of high dyeing fastness and dye uptake and soft hand feeling of cloth.

In some embodiments, the novel composite reducing agent comprises the following components in percentage by mass: 30-75 wt% of thiourea dioxide, 20-60 wt% of reducing sugar and 5-20 wt% of chemical potential control agent.

In some of these embodiments, the reducing sugar is one of glucose, sucrose, or a mixture of both; the chemical potential control agent is at least one of sodium nitrite, acrylamide, furfural, cyclohexanone and trichloroacetic acid.

In the invention, the sodium nitrite plays a role in replenishing alkalinity at low temperature due to the characteristics of strong base and weak acid salt; because of weak oxidizability, the urea can be used as a reduction potential control agent in cooperation with a decomposition product of thiourea dioxide, namely urea, at high temperature; acrylamide, furfural, cyclohexanone and trichloroacetic acid are unsaturated aldehydes and ketones and are easy to generate nucleophilic reaction. Thiourea dioxide decomposes nascent hydrogen at high temperature to generate urea, sulfenic acid, sodium bisulfite, sodium sulfate and other substances in turn, the sodium bisulfite has strong nucleophilicity and reacts with acrylamide, furfural, cyclohexanone and trichloroacetic acid to generate an addition product, and the addition product decomposes into substances before the addition reaction under alkaline conditions, thereby slowing down the decomposition of a reducing agent. The synergistic effect of thiourea dioxide, reducing sugar and chemical potential control agent makes the chemical potential of the novel composite reducing agent very stable and decompose slowly, and reduces the over-reduction phenomenon with sulfur black dye.

In some of these embodiments, the step of wetting the base yarn beam is by soaking the warp yarns with a treating base solution at a temperature of 20-30 ℃.

In some of these embodiments, the treatment base fluid is an alkali-resistant penetrant having a concentration of 3-8 g/L. The alkali-resistant penetrating agent is favorable for wetting and dissolving the dye, reduces the surface tension of water, has the functions of emulsification, diffusion, defoaming and the like, and can be used as a treatment base solution to fully wet the cloth and reduce the surface tension of the water, so that the subsequent dyeing step can be more fully dyed.

In some embodiments, the water washing step comprises one hot water washing and one normal temperature water washing, wherein the temperature of the hot water washing is 55-60 ℃, and the temperature of the normal temperature water washing is 25 ℃. Through the combination of hot water washing and normal-temperature water washing, redundant dye liquor after dyeing can be fully washed away, so that the subsequent color fixing step can perform better color fixing.

In some embodiments, the fixing step is to dip and wash the warps with a fixing base solution, the fixing base solution is glacial acetic acid, and the concentration of the glacial acetic acid is 3-8 g/L. Glacial acetic acid is used as a color fixing base solution, so that the alkalinity of the surface of the cloth can be neutralized after dyeing, and the effect of oxidation color fixing is achieved.

In some embodiments, the step of preventing the warp yarns from being fragile comprises the step of soaking and washing the warp yarns by using a fragile base solution, wherein the fragile base solution is urea, and the concentration of the urea is 3-8 g/L. The urea is used as the anti-brittleness base solution, so that the effects of color fixation and anti-brittleness are achieved, and the quality of the jean fabric is improved.

In some embodiments, the dyeing process further comprises a liquid supplementing step, wherein the liquid supplementing step comprises dyeing liquid supplementing, wetting liquid supplementing, color fixing liquid supplementing and brittleness preventing liquid supplementing, the dyeing liquid supplementing is to supplement the dyeing base liquid in the dyeing step in a circulating manner, the wetting liquid supplementing is to supplement the treatment base liquid in the base yarn warp beam wetting step in a circulating manner, the color fixing liquid supplementing is to supplement the color fixing base liquid in the color fixing step in a circulating manner, and the brittleness preventing liquid supplementing is to supplement the brittleness preventing base liquid in the brittleness preventing step in a circulating manner.

In some of these embodiments, the dye replenishment solution comprises the following components: 190-210g/L of sulfur black, 50-70g/L of novel composite reducing agent, 4-8g/L of alkali-resistant penetrating agent, 4-8g/L of Turkey red oil and 50-70g/L of caustic soda; the treatment supplementary liquid is an alkali-resistant penetrating agent with the concentration of 6-10 g/L; the color fixing supplementary liquid is glacial acetic acid with the concentration of 22-28 g/L; the anti-brittleness supplementary liquid is urea with the concentration of 22-28 g/L.

In the dyeing process, because the sizing and dyeing combination machine is operated all the time, and after the cloth is subjected to immersion cleaning, dyeing, color fixing and anti-brittleness, the cloth can take away part of materials in the treatment base liquid, the dyeing base liquid, the color fixing base liquid and the anti-brittleness base liquid along with the operation of the machine, so that the stability of the treatment base liquid, the dyeing base liquid, the color fixing base liquid and the anti-brittleness base liquid in the dyeing process can be ensured by circularly supplementing the treatment base liquid, the dyeing base liquid, the color fixing base liquid and the anti-brittleness base liquid in the dyeing process, and the dyeing stability of the denim fabrics of multiple batches is ensured.

Compared with the prior art, the odorless black jean dyeing process provided by the invention has the following beneficial effects:

in the denim dyeing process, the novel composite reducing agent is adopted to replace sodium sulfide, so that the free sulfide of the black denim fabric can be greatly reduced, and the fabric does not smell peculiar smell. The COD index of the sewage generated in the subsequent production of clothes making, water washing and the like is reduced by more than 76%, the sulfide content is reduced by more than 74%, the hydrogen sulfide content in the single machine waste gas is reduced by more than 72%, the ammonia content is reduced by more than 91%, the free sulfide of the fabric is obviously reduced, and no peculiar smell is smelled. Is an efficient and environment-friendly black jean dyeing process.

Detailed Description

The present invention will be described in detail with reference to specific examples.