阅读说明：本技术 一种弹性花灰混纺针织面料的染色方法 (Dyeing method of elastic gray-and-cotton blended knitted fabric ) 是由 冯艳 赵英武 陈家杰 傅彭成 谌丹丹 于 2019-07-30 设计创作，主要内容包括：本发明涉及一种弹性花灰混纺针织面料的染色方法,包括以下步骤：1)前处理,将弹性花灰混纺针织面料的弹性胚布进行除油、定胚；2)染色,将所述弹性胚布放入染缸,加入水、分散剂、部分均色剂、释酸剂进行染色；3)后处理,洗水后加入固色剂进行固色。本发明采用一浴两步法,通过除油、定胚的前处理,再采用分散剂、均色剂和释酸剂,防止低聚物凝聚并且保证染色过程中形成稳定的酸性环境,实现较好的上色效果,最后通过水洗固色的后处理确保染色胚布颜色的稳定性,具有较好的色牢度,优化了染整工艺,简化染色流程,缩短工作时间,降低能耗,且避免染整加工后的织物出现色差,显著提高成品效率。(the invention relates to a dyeing method of an elastic gray blended knitted fabric, which comprises the following steps: 1) pre-treating, namely, removing oil and fixing blank of elastic gray fabric; 2) dyeing, namely putting the elastic gray cloth into a dye vat, and adding water, a dispersing agent, a partial color homogenizing agent and an acid releasing agent for dyeing; 3) and (4) post-treatment, namely adding a color fixing agent for color fixing after washing. The invention adopts a one-bath two-step method, prevents oligomer coagulation and ensures that a stable acid environment is formed in the dyeing process by pre-treatment of oil removal and embryo fixation, and adopts a dispersing agent, a color homogenizing agent and an acid releasing agent, thereby realizing better coloring effect, and finally ensuring the color stability of the dyed grey cloth by post-treatment of water washing and color fixation.)

1. The dyeing method of the elastic gray-blended knitted fabric is characterized by comprising the following steps of:

1) pretreatment: removing oil and fixing blank of elastic gray blended knitted fabric;

2) Dyeing: putting the elastic grey cloth into a dye vat, adding water, adding a dispersant, a color homogenizing agent with half or more of the total addition amount and an acid releasing agent, heating to raise the temperature of the dye solution to 30-45 ℃, adding an acid dye within 10-20 min, operating for 3-15 min, controlling the pH value to be 6-7, linearly raising the temperature to 50-70 ℃ at a temperature raising rate of 1-3 ℃/min, adding acetic acid to adjust the pH value to 3-5, adding a proper amount of cationic dye and the balance of the color homogenizing agent, linearly raising the temperature to 115-130 ℃ at a temperature raising rate of 0.5-3 ℃/min, operating for 5-20 min, linearly lowering the temperature to 90-105 ℃ at a temperature lowering rate of 0.5-3 ℃/min, measuring the pH value to be 5-6, and linearly lowering the temperature to below 40 ℃ at a temperature lowering rate of 0.5-3 ℃/min, and discharging the dye solution;

3) And (3) post-treatment: adding water with the temperature of 30-40 ℃, adding acetic acid to adjust the pH value to 5-6, adding a color fixing agent, linearly heating to 65-80 ℃ at the heating rate of 0.5-3 ℃/min, running for 5-10 min, linearly cooling to below 55 ℃ at the cooling rate of 0.5-3 ℃/min, and draining to finish the process.

2. the method for dyeing the elastic gray blended knitted fabric according to claim 1, wherein the elastic gray blended knitted fabric comprises the following components in percentage by mass: 27 to 70% of polybutylene terephthalate cation-modified fiber, 27 to 70% of polyamide fiber or 3 to 10% of polyurethane fiber.

3. The method for dyeing the elastic gray-blended knitted fabric according to claim 1, wherein the dispersant comprises 7 to 11 mass percent of surfactant and the balance of water.

4. The method for dyeing the elastic flower and ash blended knitted fabric according to claim 3, wherein the dispersant comprises 4-6% of sodium dodecyl benzene sulfonate, 2-3% of sodium dodecyl sulfate, 2-2% of polysorbate-601 and the balance of water in percentage by mass.

5. The method for dyeing the elastic gray blended knitted fabric according to claim 1, wherein the acid releasing agent comprises, by mass, 3-5% of triethylene glycol, 2-3% of ethylene glycol, 1-2% of an emulsifier, 0.3-0.5% of a defoaming agent, and the balance of water.

6. The method for dyeing the elastic flower and gray blended knitted fabric according to claim 1, wherein the color homogenizing agent comprises, by mass, 3-5% of ethoxylated fatty alcohol, 2-3% of aliphatic amide, 3-4% of alcohol and the balance of water.

7. The method for dyeing the elastic gray-blended knitted fabric according to claim 1, wherein in the step 2), the addition amount of the dispersant in water is 0.3 to 1.2g/L, the addition amount of the color homogenizing agent is 0.9 to 3.0g/L, and the addition amount of the acid releasing agent is 0.2 to 0.4 g/L.

8. The method for dyeing the elastic gray-blended knitted fabric according to any one of claims 1 to 7, wherein the water used in the step 2) and the step 3) is soft water.

Technical Field

The invention relates to the technical field of dyeing and finishing processes, in particular to a dyeing method of an elastic gray-blended knitted fabric.

Background

The flower ash in the flower ash blended knitted fabric is derived from cigarette ash with the appearance color similar to that of the burnt cigarette ash. The dyeing process of the traditional colored gray blended knitted fabric comprises the steps of directly dyeing fabric fibers, then manufacturing the fabric fibers into yarns through the working procedures of combing, drawing, twisting and the like, and obtaining the fabric through knitting and weaving the yarns. However, spinning and weaving in this process has great difficulty due to the elasticity of the yarn. And the fabric fiber is dyed and then is subjected to the processing procedures of spinning, weaving, subsequent treatment and the like, so that the color of the fabric is easy to be different, and the finished product efficiency is low.

At present, the dyeing process of the gray blended knitted fabric mostly adopts a two-bath two-step method, and the dyeing and finishing of fabric fibers under an alkaline condition and the dyeing and finishing of polymer fibers under an acidic condition are needed. The method comprises the process steps of pretreatment, soaping and the like, and has the disadvantages of complicated procedure, long process time and high energy consumption.

Disclosure of Invention

in view of the above, there is a need to provide a dyeing method for an elastic knitted fabric blended with colored gray, which aims to optimize the dyeing and finishing process of the knitted fabric blended with colored gray, simplify the process flow, shorten the working time, reduce the energy consumption, avoid color difference of the dyed and finished fabric, and improve the efficiency of finished products.

In order to achieve the purpose, the invention provides a dyeing method of an elastic gray-blended knitted fabric, which comprises the following steps:

1) Pretreatment: removing oil and fixing blank of elastic gray blended knitted fabric;

2) Dyeing: putting the elastic grey cloth into a dye vat, adding water, adding a dispersant, a color homogenizing agent with half or more of the total addition amount and an acid releasing agent, heating to raise the temperature of the dye solution to 30-45 ℃, adding an acid dye within 10-20 min, operating for 3-15 min, controlling the pH value to be 6-7, linearly raising the temperature to 50-70 ℃ at a temperature raising rate of 1-3 ℃/min, adding acetic acid to adjust the pH value to 3-5, adding a proper amount of cationic dye and the balance of the color homogenizing agent, linearly raising the temperature to 115-130 ℃ at a temperature raising rate of 0.5-3 ℃/min, operating for 5-20 min, linearly lowering the temperature to 90-105 ℃ at a temperature lowering rate of 0.5-3 ℃/min, measuring the pH value to be 5-6, and linearly lowering the temperature to below 40 ℃ at a temperature lowering rate of 0.5-3 ℃/min, and discharging the dye solution;

3) And (3) post-treatment: adding water with the temperature of 30-40 ℃, adding acetic acid to adjust the pH value to 5-6, adding a color fixing agent, linearly heating to 65-80 ℃ at the heating rate of 0.5-3 ℃/min, running for 5-10 min, linearly cooling to below 55 ℃ at the cooling rate of 0.5-3 ℃/min, and draining to finish the process.

Preferably, 2/3 of the total amount of the color homogenizing agent is added in the first dyeing process, and the rest 1/3 of the color homogenizing agent is added in the second dyeing process. Namely, the color homogenizing agent is added into water together with the dispersing agent and the acid releasing agent to be 2/3 of the total adding amount, and the color homogenizing agent is added together with the cationic dye to be 1/3 of the rest after the acetic acid is added to adjust the pH value.

Optionally, the elastic gray blended knitted fabric comprises the following components: two or more of polybutylene terephthalate cation-modified fibers, polyamide fibers, or polyurethane fibers.

Preferably, the elastic gray blended knitted fabric comprises the following components in percentage by mass: 27 to 70% of polybutylene terephthalate cation-modified fiber, 27 to 70% of polyamide fiber or 3 to 10% of polyurethane fiber.

Optionally, the dispersant comprises 7-11% of surfactant and the balance of water by mass percentage.

further, the surfactant comprises alkyl benzene sulfonate, alkyl sulfate and sorbitol fatty acid ester.

Preferably, the dispersant comprises, by mass, 4-6% of sodium dodecyl benzene sulfonate, 2-3% of sodium dodecyl sulfate, 601-2% of polysorbate-and the balance of water.

Optionally, the acid releasing agent comprises, by mass, 3-5% of triethylene glycol, 2-3% of ethylene glycol, 1-2% of an emulsifier, 0.3-0.5% of a defoaming agent, and the balance of water.

Optionally, the color homogenizing agent comprises, by mass, 3-5% of ethoxylated fatty alcohol, 2-3% of aliphatic amide, 3-4% of alcohol and the balance of water.

optionally, in the step 2), the addition amount of the dispersant in water is 0.3-1.2 g/L, the total addition amount of the color homogenizing agent is 0.9-3.0 g/L, and the addition amount of the acid releasing agent is 0.2-0.4 g/L.

optionally, the water used in step 2) and step 3) is soft water.

Optionally, before the post-treatment in the step 3), washing with water at 30-40 ℃ for 2 times for 4-10 min each time.

The invention has the following beneficial effects:

(1) In the dyeing process, after water is added, a dispersant, a partial color homogenizing agent and an acid releasing agent are added, so that on one hand, the dispersant and the color homogenizing agent are utilized to improve the dispersion degree of oligomers in the dye solution, and the polymerization and agglomeration phenomena of the oligomers are remarkably reduced, thereby avoiding frosting on the gray cloth in the dyeing process and preventing the influence on the dyeing effect and the rubbing fastness of the dyed gray cloth; on the other hand, the acid releasing agent is utilized to maintain the stability of the pH value of the dyeing solution, so that the dyeing process is always in an acidic condition, and an ideal dyeing effect is realized. This is because the acid in the dye liquor is gradually consumed as the dyeing process proceeds, resulting in difficulty in coloring.

The invention adopts a one-bath two-step method, prevents oligomer coagulation and ensures that a stable acid environment is formed in the dyeing process by pre-treatment of oil removal and embryo fixation and adding a dispersing agent, a color homogenizing agent and an acid releasing agent, realizes a better coloring effect, finally abandons the dyeing process of the existing two-bath two-step method by post-treatment of water washing and color fixation, does not need to dye under an acid condition after dyeing under an alkaline condition, optimizes the dyeing and finishing process, simplifies the dyeing process, shortens the working time, reduces the energy consumption, avoids the color difference of the fabric after dyeing and finishing processing, and obviously improves the efficiency of finished products.

drawings

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a process flow chart of the step 2) dyeing in the dyeing method of the elastic flower-ash blended knitted fabric;

FIG. 2 is a process flow graph of water washing in the post-treatment of step 3) in the dyeing method of the elastic flower-ash blended knitted fabric;

FIG. 3 is a process flow chart of color fixation in the step 3) post-treatment in the dyeing method of the elastic gray blended knitted fabric.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the description of the present invention, it is to be noted that those whose specific conditions are not specified in the examples are carried out according to the conventional conditions or the conditions recommended by the manufacturers. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

In the following examples, the acid dyes selected are from the company HUNTSMANN/S series; the cationic dye selected is from Astrazon series of Dystar company; the dye fixing agent selected was purchased from ztresal NR from join inc.