阅读说明：本技术 一种涤纶混纺面料的染色工艺 (Dyeing process of polyester blended fabric ) 是由 黄静 于 2019-03-22 设计创作，主要内容包括：本发明提供了一种涤纶混纺面料的染色工艺,包括以下步骤：面料前处理：将涤纶混纺面料放入蒸煮液中,并向蒸煮液中加入烧碱溶液,向蒸煮液再加入适量亚硫酸钠、硅酸钠和磷酸钠的混合物蒸煮后将其捞起,并放入漂白液中漂白；染液配制：向染缸中加入清水和染料,并加入烧碱,然后加热至50～60℃时,再向染缸中加入扩散剂、表面活性剂、均染剂,超声分散处理；面料染色和面料洗涤、烘干四大步骤；本发明通过经过前处理的面料表面杂质有效去除,从而更易上色,上色后的色牢度更高；另外染液中分中温上色和高温浸色两个不同温度段染色,然后严格控制温度升降速率,使得染色效果更好。(The invention provides a dyeing process of a polyester blended fabric, which comprises the following steps: pretreatment of the fabric: putting the polyester blended fabric into cooking liquor, adding caustic soda solution into the cooking liquor, adding a mixture of a proper amount of sodium sulfite, sodium silicate and sodium phosphate into the cooking liquor, cooking, taking out the mixture, and bleaching the mixture in bleaching liquor; preparing a dye solution: adding clear water and dye into a dye vat, adding caustic soda, heating to 50-60 ℃, adding a dispersing agent, a surfactant and a leveling agent into the dye vat, and performing ultrasonic dispersion treatment; dyeing and washing and drying the fabric; according to the invention, impurities on the surface of the fabric subjected to pretreatment are effectively removed, so that the fabric is easier to color, and the color fastness after coloring is higher; in addition, dyeing is carried out in two different temperature sections of medium-temperature coloring and high-temperature color dipping in dye liquor, and then the temperature rising and falling speed is strictly controlled, so that the dyeing effect is better.)

1. The dyeing process of the polyester blended fabric is characterized by comprising the following steps of:

1) pretreatment of the fabric: putting the polyester blended fabric into cooking liquor, adding caustic soda solution into the cooking liquor, heating the cooking liquor to 75-80 ℃, adding a mixture of a proper amount of sodium sulfite, sodium silicate and sodium phosphate into the cooking liquor, slowly heating to 95-100 ℃, cooking for 30-50 min, taking out the mixture after cooking, putting the mixture into bleaching liquor, bleaching for 45-60 min, and washing with water to obtain the polyester blended fabric to be dyed;

2) preparing a dye solution: adding clear water and dye in a proper proportion into a dye vat, adding caustic soda to adjust the pH value to 8-10, heating to 50-60 ℃, adding a dispersing agent, a surfactant and a leveling agent into the dye vat, and performing ultrasonic dispersion treatment;

3) dyeing the fabric: putting the polyester blended fabric into a dye solution subjected to ultrasonic dispersion treatment, slowly heating to 90-100 ℃, dip-dyeing for 10-15 min, slowly heating to 120-125 ℃, carrying out high-temperature dyeing for 40-50 min, and finally slowly cooling to 50 ℃ to discharge the dye solution to obtain a dyed fabric;

4) washing and drying the fabric: firstly, washing the dyed fabric with cold water for the first time, then washing the fabric with an alkaline washing solution at the temperature of 40-45 ℃ for the second time after washing with the cold water, and drying the washed fabric by blowing at the temperature of 120-130 ℃.

2. The dyeing process of the polyester blended yarn fabric according to claim 1, wherein the pH value of the cooking solution after the caustic soda solution is added in the step 1 is 10-12.

3. The dyeing process of the polyester blended fabric according to claim 1, wherein the weight of the mixture of sodium sulfite, sodium silicate and sodium phosphate in the step 1 is 0.4-0.6% of the weight of the cooking liquor, and the mass ratio of the sodium sulfite, the sodium silicate and the sodium phosphate is 8: 5: 2.

4. The dyeing process of the polyester blended yarn fabric according to claim 1, wherein the bleaching agent in the bleaching solution in the step 1 is one of sodium hypochlorite, hydrogen peroxide and sodium chlorite.

5. The dyeing process of the polyester blended yarn fabric as claimed in claim 1, wherein the ratio of the clear water to the dye in the step 2 is proportioned according to the chromaticity of the required dyeing.

6. The dyeing process of the polyester blended fabric according to claim 1, characterized in that the surfactant in the step 2 is one or more of amine salt and quaternary ammonium salt.

7. The dyeing process of the polyester blended yarn weaved fabric according to claim 1, wherein the temperature rise and fall speed in step 3 is 1-2 ℃/min.

8. The dyeing process of the polyester blended yarn fabric according to claim 1, wherein the washing temperature of the primary cold water washing in the step 4 is 20-22 ℃, and the washing time is 5-7 min.

9. The dyeing process of the polyester blended yarn fabric according to claim 1, wherein the alkaline water washing solution for the secondary washing in the step 4 is a sodium hydroxide solution with a concentration of 0.8-1.2%.

Technical Field

The invention relates to the technical field of fabric dyeing treatment, in particular to a dyeing process of a polyester blended fabric.

Background

The terylene fabric is a very large chemical fiber garment fabric used in daily life, has higher strength and elasticity recovery capability, and is firm and durable, and crease-resistant and non-ironing. However, the polyester fabric has the defects of poor hygroscopicity, stuffy feeling when worn in summer, easy static electrification in winter and the like, so that the fabrics can basically meet the requirements of people.

The terylene blended fabric is a relatively popular cloth in recent years, is formed by blending the terylene fabric serving as a main body with fabrics made of various different materials, has the advantages of the terylene fabric and completely overcomes the defects of the terylene fabric. However, in the process of dyeing the polyester blended fabric, some problems exist, for example, the polyester fiber is a hydrophobic fiber with a compact structure, has no specific dyeing group in molecules, is lack of hydrophilicity, has low swelling degree in water, and brings certain difficulty to dyeing; the problems of difficult coloring, easy staining, easy damage, poor leveling property, low color fastness and the like exist in the process of dyeing and finishing the blended fabric, and the prior art can not effectively solve the problems. Therefore, the invention provides a dyeing process of the terylene blended fabric, which can solve the technical problems.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a dyeing process capable of effectively solving the problems of difficult coloring, easy staining, easy damage, poor level-dyeing property and low color fastness of a polyester blended fabric during dyeing.

(II) technical scheme

The invention is realized by the following technical scheme:

a dyeing process of a polyester blended fabric comprises the following steps:

1) pretreatment of the fabric: putting the polyester blended fabric into cooking liquor, adding caustic soda solution into the cooking liquor, heating the cooking liquor to 75-80 ℃, adding a mixture of a proper amount of sodium sulfite, sodium silicate and sodium phosphate into the cooking liquor, slowly heating to 95-100 ℃, cooking for 30-50 min, taking out the mixture after cooking, putting the mixture into bleaching liquor, bleaching for 45-60 min, and washing with water to obtain the polyester blended fabric to be dyed;

2) preparing a dye solution: adding clear water and dye in a proper proportion into a dye vat, adding caustic soda to adjust the pH value to 8-10, heating to 50-60 ℃, adding a dispersing agent, a surfactant and a leveling agent into the dye vat, and performing ultrasonic dispersion treatment;

3) dyeing the fabric: putting the polyester blended fabric into a dye solution subjected to ultrasonic dispersion treatment, slowly heating to 90-100 ℃, dip-dyeing for 10-15 min, slowly heating to 120-125 ℃, carrying out high-temperature dyeing for 40-50 min, and finally slowly cooling to 50 ℃ to discharge the dye solution to obtain a dyed fabric;

4) washing and drying the fabric: firstly, washing the dyed fabric with cold water for the first time, then washing the fabric with an alkaline washing solution at the temperature of 40-45 ℃ for the second time after washing with the cold water, and drying the washed fabric by blowing at the temperature of 120-130 ℃.

Preferably, the pH value of the cooking liquor after the caustic soda solution is added in the step 1 is 10-12.

Preferably, the weight of the mixture of sodium sulfite, sodium silicate and sodium phosphate in the step 1 is 0.4-0.6% of the weight of the cooking liquor, and the mass ratio of sodium sulfite, sodium silicate and sodium phosphate is 8: 5: 2.

Preferably, the bleaching agent in the bleaching solution in the step 1 is one of sodium hypochlorite, hydrogen peroxide and sodium chlorite.

Preferably, the ratio of the clear water to the dye in the step 2 is proportioned according to the chromaticity of the required dyeing.

Preferably, the surfactant in step 2 is one or more of amine salt and quaternary ammonium salt.

Preferably, the temperature rising and falling speed in the step 3 is 1-2 ℃/min.

Preferably, the washing temperature of the primary cold water washing in the step 4 is 20-22 ℃, and the washing time is 5-7 min.

Preferably, the alkaline water washing solution for the second washing in the step 4 is a sodium hydroxide solution with a concentration of 0.8-1.2%.

(III) advantageous effects

1. According to the invention, through the fabric pretreatment process, sodium sulfite added in the process of cooking the fabric enables the cooking liquor to easily wet the fabric and quickly permeate into the fabric, so that impurities are removed, lignin on the outer surface of the fabric is changed into sodium lignosulfonate, partial cottonseed hulls of the fabric are removed, and the fabric is prevented from being damaged by air oxidation in the high-temperature cooking process; simultaneously, the added sodium silicate has the capability of adsorbing and decomposing iron in the cooking liquid and impurities in the fibers, and effectively prevents impurities of the fabric from generating precipitates and attaching to the surface in the cooking process; in addition, the added sodium phosphate has the function of softening the cooking liquor, removes calcium and magnesium ions in the cooking liquor, improves the cooking effect and reduces the using amount of an auxiliary agent; impurities on the surface of the fabric subjected to pretreatment are effectively removed, so that coloring is easier, and the color fastness after coloring is higher;

2. the fabric is dyed in two different temperature sections of medium-temperature coloring and high-temperature color dipping in dye liquor, then the temperature rising and falling speed is strictly controlled, the coloring effect of dyeing is effectively improved, and the damage to the fabric during the high-temperature coloring period can be greatly reduced due to the strict control of the temperature;

3. according to the invention, through the primary cold water flushing and the secondary alkali liquor washing, not only is the residual dye liquor on the fabric removed, but also impurities in the residual dye liquor on the fabric can be effectively removed, so that the fabric has better surface coloring degree.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all 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.