阅读说明：本技术 一种涤棉前处理染涤一浴的方法 (Method for pre-treating polyester cotton and dyeing polyester in one bath ) 是由 刘冲 吴岩 赵国平 陈建峰 杜方东 于 2020-05-06 设计创作，主要内容包括：本发明提出用于涤棉前处理的染涤一浴的方法,包括以下步骤：涤纶浴染：向涤纶织物中依次加入双氧水、碱性匀染剂,分散染料进行染色,得到浴染涤纶；棉套染：向棉织物中依次加入的活性染料,硫酸钠溶液,碳酸钠溶液进行染色,得到套染棉；一浴皂洗：向所述浴染涤纶和所述套染棉中加入涤利清进行皂洗,得到预处理涤棉。本发明提供的用于涤棉前处理的染涤一浴的方法,选用特定的碱性分散染料,同时运用助剂在碱性条件下对涤棉针织面料进行氧漂染涤一浴法处理,实现简化并缩短流程工艺,提高生产效率,保证品质的同时,达到节能减排的效果。(The invention provides a dyeing-washing one-bath method for polyester-cotton pretreatment, which comprises the following steps: carrying out polyester bath dyeing: adding hydrogen peroxide, an alkaline leveling agent and a disperse dye into the polyester fabric in sequence for dyeing to obtain bath-dyed polyester; cotton pad dyeing: adding reactive dye, sodium sulfate solution and sodium carbonate solution into cotton fabric in sequence for dyeing to obtain pad-dyed cotton; one-bath soaping: and adding dacron into the bath-dyed dacron and the sleeve-dyed cotton for soaping to obtain the pretreated polyester-cotton. According to the polyester-bath dyeing method for the polyester-cotton pretreatment, the specific alkaline disperse dye is selected, and meanwhile, the auxiliary agent is used for carrying out oxygen bleaching, dyeing and washing-bath treatment on the polyester-cotton knitted fabric under the alkaline condition, so that the process is simplified and shortened, the production efficiency is improved, the quality is guaranteed, and meanwhile, the effects of energy conservation and emission reduction are achieved.)

1. A method for dyeing and washing one bath for polyester-cotton pretreatment is characterized by comprising the following steps: carrying out polyester bath dyeing: adding hydrogen peroxide, an alkaline leveling agent and a disperse dye into a first mixture consisting of a polyester fabric and water according to a mass ratio of 1:6-1:10 in sequence, and dyeing for 40-60min under the conditions that the bath ratio ranges from 1:6-1:10, the bath dyeing pH range is 9.5-10.5, and the bath dyeing temperature range is 125-135 ℃ to obtain bath-dyed polyester, wherein the concentration ranges of the added hydrogen peroxide, the alkaline leveling agent and the disperse dye are respectively 3-8g/L, 1.5-2.5g/L and 1-3 g/L;

cotton pad dyeing: adding reactive dye, sodium sulfate and sodium carbonate into a second mixture consisting of cotton fabric and water in a mass ratio of 1:6-1:10 in sequence, and dyeing at the over-dyeing temperature of 60-80 ℃ and under the over-dyeing pH range of 9.5-11 to obtain over-dyed cotton, wherein the mass concentrations of the added reactive dye, the added sodium sulfate and the added sodium carbonate are 1-5g/L, 10-100g/L and 5-30g/L respectively;

one-bath soaping: adding dacron cleaner into a third mixture consisting of the bath-dyed dacron, the sleeve-dyed cotton and water, and soaping for 20-30min at the soaping temperature of 80-90 ℃ to obtain pretreated polyester-cotton, wherein the mass ratio of the total amount of the bath-dyed dacron and the sleeve-dyed cotton to the water in the third mixture is 1:6-1:10, and the mass ratio of the bath-dyed dacron to the sleeve-dyed cotton is 1: 0.4-1: 2.3, the concentration range of the added terlitine is 1-1.5 g/L.

2. The dyeing-washing-bath method for polyester-cotton pretreatment according to claim 1, characterized in that the disperse dye is any one of disperse red ALK, disperse yellow ALK, disperse blue ALK of Longsheng basic disperse dye ALK (N) series or a combination thereof.

3. The method for dyeing one bath for the pre-treatment of polyester cotton according to claim 2, characterized in that the alkaline leveling agent comprises any one of leveling agent HK2030, leveling agent TF, leveling agent DBKAK-47.

4. The method for dyeing one bath for the pre-treatment of polyester cotton according to claim 3, characterized in that the alkaline leveling agent is a leveling agent HK 2030.

5. The dyeing-washing-bath method for the polyester-cotton pretreatment is characterized in that the concentrations of the added hydrogen peroxide, the alkaline leveling agent and the disperse dye are respectively 5g/L, 2g/L and 2 g/L.

6. The method for dyeing the polyester-bath for the polyester-cotton pretreatment according to claim 5, characterized in that the bath dyeing pH is 10.

7. The method for dyeing and washing one bath for the polyester-cotton pretreatment according to claim 6, characterized in that the bath ratio is 1:10, and the bath dyeing temperature is 130 ℃.

8. The method for dyeing the polyester-bath for the polyester-cotton pretreatment according to claim 1, wherein the concentration of the added polyester-litharge is in the range of 1-1.3 g/L.

9. The method for dyeing the polyester-bath for the polyester-cotton pretreatment according to claim 8, wherein the concentration of the added polyester-litharge is 1.3 g/L.

10. The method for dyeing and washing one bath for the pre-treatment of polyester-cotton according to claim 9, characterized in that the soaping temperature is in the range of 85-90 ℃.

Technical Field

The invention relates to the field of fiber preparation, in particular to a dyeing-washing one-bath method for polyester-cotton pretreatment.

Background

In the traditional process, the refining oxygen bleaching of cotton fibers needs to be carried out under an alkaline condition, and hydrogen peroxide is needed, while the traditional polyester fiber disperse dyeing needs to be carried out under a weak acid condition. Therefore, the pH values of the terylene dyeing bath and the cotton fiber bleaching bath are in contradiction, and if the alkali in the former bleaching bath is not completely removed, the pH value of the terylene acid condition can be caused to fluctuate, so that the dyeing quality is caused to fluctuate. However, polyester fabrics are easy to generate oligomers under acidic conditions and are attached to the surface of the fibers in a large amount, so that the performance and appearance quality of the fibers are affected; in addition, a large amount of oily oligomer can be firmly attached to the inner wall and the pipeline of the high-temperature high-pressure machine, so that the difficulty in cleaning the cylinder body is increased; in addition, the polyester-cotton blended fabric is dyed under the acidic high-temperature condition, and the long-time action of acid can cause the phenomena of hydrolysis and strength reduction of cotton fibers, thereby affecting the product quality. After dyeing, reduction cleaning is carried out, so that a large amount of energy sources such as water, electricity and the like are consumed, and a large amount of time is consumed. The whole process flow is complex and tedious, the process time is dozens of hours, the production efficiency is low, the consumption of water, electricity and steam is large, and the sewage discharge is large; and because the wet processing time is long, the cloth cover is easy to fluff and the hand feeling of the fabric is influenced, and the product quality and the economic benefit of enterprises are reduced.

Disclosure of Invention

The invention aims to solve the problems and provides a method for dyeing and washing one bath for polyester-cotton pretreatment, which selects specific alkaline disperse dyes and simultaneously applies an auxiliary agent to carry out oxygen bleaching, dyeing and washing one bath treatment on the polyester-cotton knitted fabric under an alkaline condition, thereby simplifying and shortening the process flow, improving the production efficiency, ensuring the quality and achieving the effects of energy conservation and emission reduction.

In order to achieve the purpose, the invention provides a dyeing-washing one-bath method for pre-treatment of polyester cotton, which comprises the following steps:

carrying out polyester bath dyeing: adding hydrogen peroxide, an alkaline leveling agent and a disperse dye into a first mixture consisting of a polyester fabric and water according to a mass ratio of 1:6-1:10 in sequence, and dyeing for 40-60min under the conditions that the bath ratio ranges from 1:6-1:10, the bath dyeing pH range is 9.5-10.5, and the bath dyeing temperature range is 125-135 ℃ to obtain bath-dyed polyester, wherein the concentration ranges of the added hydrogen peroxide, the alkaline leveling agent and the disperse dye are respectively 3-8g/L, 1.5-2.5g/L and 1-3 g/L;

cotton pad dyeing: adding reactive dye, sodium sulfate and sodium carbonate into a second mixture consisting of cotton fabric and water in a mass ratio of 1:6-1:10 in sequence, and dyeing at the over-dyeing temperature of 60-80 ℃ and under the over-dyeing pH range of 9.5-11 to obtain over-dyed cotton, wherein the mass concentrations of the added reactive dye, the added sodium sulfate and the added sodium carbonate are 1-5g/L, 10-100g/L and 5-30g/L respectively;

one-bath soaping: adding dacron cleaner into a third mixture consisting of the bath-dyed dacron, the sleeve-dyed cotton and water, and soaping for 20-30min at the soaping temperature of 80-90 ℃ to obtain pretreated polyester-cotton, wherein the mass ratio of the total amount of the bath-dyed dacron and the sleeve-dyed cotton to the water in the third mixture is 1:6-1:10, and the mass ratio of the bath-dyed dacron to the sleeve-dyed cotton is 1: 0.4-1: 2.3, the concentration range of the added terlitine is 1-1.5 g/L.

Further, the dyeing-washing-bath method for the polyester-cotton pretreatment provided by the invention is characterized in that the disperse dye is any one or the combination of disperse red ALK, disperse yellow ALK and disperse blue ALK of Longsheng basic disperse dye ALK (N) series.

Further, the method for dyeing and washing one bath for the pre-treatment of the polyester cotton, provided by the invention, is also characterized in that the alkaline leveling agent comprises any one of a leveling agent HK2030, a leveling agent TF and a leveling agent DBKAK-47.

Further, the method for dyeing and washing one bath for the pre-treatment of polyester cotton, provided by the invention, is also characterized in that the alkaline leveling agent is a leveling agent HK 2030.

Furthermore, the method for dyeing and washing one bath for the polyester-cotton pretreatment provided by the invention is characterized in that the concentrations of the added hydrogen peroxide, the alkaline leveling agent and the disperse dye are respectively 5g/L, 2g/L and 2 g/L.

Further, the method for dyeing the polyester-cotton bath for the polyester-cotton pretreatment is characterized in that the bath dyeing pH is 10.

Further, the method for dyeing and washing one bath for the polyester-cotton pretreatment provided by the invention is also characterized in that the bath ratio is 1:10, and the bath dyeing temperature is 130 ℃.

Further, the method for dyeing the polyester-cotton bath for the pretreatment of the polyester-cotton also has the characteristic that the concentration range of the added concentration of the polyester-litharge is 1-1.3 g/L.

Further, the method for dyeing the polyester-cotton one-bath for the polyester-cotton pretreatment is characterized in that the concentration of the added polyester-cotton clean is 1.3 g/L.

Further, the method for dyeing and washing one bath for the polyester-cotton pretreatment provided by the invention is characterized in that the soaping temperature is in the range of 85-90 ℃.

Action and Effect of the invention

The invention relates to a dyeing-washing-bath method for polyester-cotton pretreatment, which is characterized in that polyester is firstly dyed under alkaline conditions, the generation of oligomers is reduced under alkaline conditions, the step of reduction cleaning is omitted after dyeing is finished, cotton fibers are directly dyed by reactive dyes after washing, and finally, the residual dispersion, the floating color of the reactive dyes, some oligomers and other impurities on the fabrics are removed by dispersion and reactive washing-bath soap washing after dyeing is finished, so that the cleaning effect is achieved. The method for dyeing and washing one bath selects the disperse dye which has small staining on cotton or the disperse dye which can be removed by soaping or alkali washing, so that the alkali washing property is good, and when the reactive dye is fixed by adding alkali, not only the disperse dye on the surface of the terylene is easy to wash and remove, but also the disperse dye is easy to wash and remove the staining on the cotton. In the method for dyeing and washing one bath, the adopted polyester cotton alkaline dyeing process greatly shortens the dyeing process, saves the consumption of water and electricity, saves the time, and improves the equipment utilization rate and the production efficiency of workers.

Detailed Description

The method of dyeing a polyester bath for the pretreatment of polyester cotton according to the present invention will be described in detail with reference to examples. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention.

The invention provides a method for dyeing and washing one bath for polyester-cotton pretreatment, which comprises the following steps:

carrying out polyester bath dyeing: adding hydrogen peroxide, an alkaline leveling agent and a disperse dye into a first mixture consisting of a polyester fabric and water in a mass ratio of 1:6-1:10 in sequence, and dyeing for 40-60min under the conditions that the bath ratio ranges from 1:6-1:10, the bath dyeing pH ranges from 9.5 to 10.5 and the bath dyeing temperature ranges from 125 ℃ to 135 ℃ to obtain the bath-dyed polyester, wherein the concentration ranges of the added hydrogen peroxide, the alkaline leveling agent and the disperse dye are respectively 3-8g/L, 1.5-2.5g/L and 1-3 g/L.

Furthermore, in the one-bath dyeing and washing method for the pretreatment of polyester and cotton, because the one-bath dyeing and washing method does not have a reduction cleaning process in the traditional process, only water washing and soaping are needed, and disperse dyes with small cotton staining or disperse dyes with staining capable of being removed through soaping or alkali washing are selected. When the disperse dye with good alkali washing performance is used for fixing color by adding alkali into the reactive dye, not only the loose color of the disperse dye on the surface of the terylene is easy to wash out, but also the staining of the disperse dye to cotton is easy to wash out. In the present invention, the disperse dye may preferably be a lyocell basic disperse dye. Further, the disperse dye is any one or combination of disperse red ALK, disperse yellow ALK and disperse blue ALK of Longsheng basic disperse dye ALK (N) series. In some embodiments, the disperse dye employed is the lyocell basic disperse dye alk (n) series.

Further, in the method for dyeing and washing one bath for the pre-treatment of polyester cotton, provided by the invention, the alkaline leveling agent comprises any one of a leveling agent HK2030, a leveling agent TF and a leveling agent DBKAK-47. The basic leveling agent is preferably HK2030 because of its good leveling property. In some embodiments, the basic leveling agent employed is HK 2030.

In addition, in the dyeing-washing one-bath method for the polyester-cotton pretreatment, the preferable concentrations of the added hydrogen peroxide, the alkaline leveling agent and the disperse dye are respectively 5g/L, 2g/L and 2 g/L. In some embodiments, the concentrations of the added hydrogen peroxide, the added basic leveling agent and the added disperse dye are 5g/L, 2g/L and 2g/L respectively.

In addition, in the method for dyeing the polyester-cotton one-bath for the polyester-cotton pretreatment, the bath ratio is preferably 1:10, and the bath dyeing temperature is preferably 130 ℃, because the lower bath ratio is more favorable for the dyeing stability. In some embodiments, the bath ratio is 1:10, the bath dyeing temperature is 130 ℃, and finally the bath-dyed polyester is obtained.

Cotton pad dyeing: adding reactive dye, sodium sulfate and sodium carbonate into a second mixture consisting of cotton fabric and water in a mass ratio of 1:6-1:10 in sequence, and dyeing at the over-dyeing temperature of 60-80 ℃ and under the over-dyeing pH range of 9.5-11 to obtain over-dyed cotton, wherein the mass concentrations of the added reactive dye, the added sodium sulfate and the added sodium carbonate are 1-5g/L, 10-100g/L and 5-30g/L respectively.

Further, in the method for dyeing and washing one bath for the pre-treatment of polyester-cotton, the process adopted in the step of cotton top dyeing is the same as the traditional process, the mass concentrations of the added reactive dye, the sodium sulfate and the sodium carbonate are preferably 1g/L, 50g/L and 15g/L respectively, the top dyeing temperature is preferably 60 ℃, and the pH value of the top dyeing is 10. In some embodiments, the mass concentrations of the added reactive dye, the sodium sulfate and the sodium carbonate are 1g/L, 50g/L and 15g/L respectively, the overdosing temperature is preferably 60 ℃, and the overdosing pH is 10.

One-bath soaping: adding dacron cleaner into a third mixture consisting of the bath-dyed dacron, the sleeve-dyed cotton and water, and soaping for 20-30min at the soaping temperature of 80-90 ℃ to obtain pretreated polyester-cotton, wherein the mass ratio of the total amount of the bath-dyed dacron and the sleeve-dyed cotton to the water in the third mixture is 1:6-1:10, and the mass ratio of the bath-dyed dacron to the sleeve-dyed cotton is 1: 0.4-1: 2.3, the concentration range of the added terlitine is 1-1.5 g/L.

Specifically, in the method for dyeing and washing one bath for the pretreatment of polyester cotton, the concentration range of the added concentration of the terli is preferably 1-1.3g/L, and more preferably 1.3 g/L. Namely, the mass ratio of the total amount of the bath-dyed terylene and the sleeve-dyed cotton to the dacron is preferably 1:0.01-1:0.013, and more preferably 1: 0.013. In some embodiments, the mass ratio of the total amount of the bath-dyed polyester and the casing-dyed cotton to the dacron detergent is 1: 0.013.

in addition, in the dyeing and washing one-bath method for the polyester-cotton pretreatment, the soaping temperature is preferably in the range of 85-90 ℃ and most preferably 85 ℃. In some embodiments, the soaping temperature of the bath dyed polyester and the casing dyed cotton is 85 ℃.