阅读说明：本技术 一种涤纶面料的染色工艺 (Dyeing process of polyester fabric ) 是由 罗国其 陈立锋 于 2020-06-28 设计创作，主要内容包括：本发明涉及面料染整的技术领域,公开了一种涤纶面料的染色工艺,将涤纶坯布进行如下步骤进行：S1：预定型；S2：退浆；S3：水洗中和；S4：染色,将水洗中和后的坯布进行染色,所用染料的各物质以重量份计为：分散染料15-25份、分散剂10-20份、丙三醇2-6份、异辛酸聚氧乙烯醚硫酸酯1-3份、二聚季戊四醇六羟基硬脂酸酯3-8份、匀染剂40-80份、醋酸3-9份以及水150-210份；S5：连续清洗；S6：脱水；S7：开幅；S8：定型；经过S8定型后的坯布即为染色完毕的涤纶面料。能够提高涤纶面料染色的色牢度。(The invention relates to the technical field of fabric dyeing and finishing, and discloses a dyeing process of a polyester fabric, which comprises the following steps of: s1: presetting; s2: desizing; s3: washing and neutralizing; s4: dyeing, namely dyeing the grey cloth neutralized by water washing, wherein the used dyes comprise the following components in parts by weight: 15-25 parts of disperse dye, 10-20 parts of dispersing agent, 2-6 parts of glycerol, 1-3 parts of isooctanoic acid polyoxyethylene ether sulfate, 3-8 parts of dipentaerythritol hexahydroxy stearate, 40-80 parts of leveling agent, 3-9 parts of acetic acid and 150 parts of water as well as 210 parts of water; s5: continuously cleaning; s6: dehydrating; s7: scutching; s8: shaping; and the grey cloth shaped by S8 is the dyed terylene fabric. The color fastness of the polyester fabric dyeing can be improved.)

1. A dyeing process of a polyester fabric is characterized by comprising the following steps: the method comprises the following steps of:

s1: presetting, namely presetting the grey cloth;

s2: desizing, namely desizing the grey cloth treated by the S1;

s3: washing and neutralizing, namely washing and neutralizing the grey cloth treated by the S2;

s4: dyeing, namely dyeing the grey cloth neutralized by water washing, wherein the used dyes comprise the following components in parts by weight: 15-25 parts of disperse dye, 10-20 parts of dispersing agent, 2-6 parts of glycerol, 1-3 parts of isooctanoic acid polyoxyethylene ether sulfate, 3-8 parts of dipentaerythritol hexahydroxy stearate, 40-80 parts of leveling agent, 3-9 parts of acetic acid and 150 parts of water as well as 210 parts of water;

s5: continuously cleaning, namely continuously cleaning the grey cloth processed by the S4;

s6: dehydrating, namely dehydrating the grey cloth processed by the S5;

s7: scutching, namely scutching the grey cloth processed by the S6;

s8: shaping, namely shaping the grey cloth processed by the S7;

and the grey cloth shaped by S8 is the dyed terylene fabric.

2. The dyeing process of the polyester fabric according to claim 1, characterized in that: the dispersant is sodium lignosulfonate.

3. The dyeing process of the polyester fabric according to claim 2, characterized in that: the dispersing agent also comprises sodium dodecyl benzene sulfonate and sodium succinate, and the mass ratio of the sodium lignin sulfonate to the sodium dodecyl benzene sulfonate to the sodium succinate is 4:8: 3.

4. The dyeing process of the polyester fabric according to claim 1, characterized in that: s5, after continuous cleaning, the gray fabric is soaked for 20-30min by using a color fixing solution with a color fixing agent, wherein the bath ratio is 1: 50; the raw material of the color fixing agent comprises triethylene tetramine.

5. The dyeing process of the polyester fabric according to claim 4, characterized in that: the color fixing agent comprises, by weight, 40-60 parts of triethylene tetramine, 10-15 parts of pentaerythritol stearate and 20-50 parts of sodium trimetaphosphate.

6. The dyeing process of the polyester fabric according to claim 3, characterized in that: the S4 dyeing is carried out by adding disperse dye, dispersant, glycerol, isooctanoic acid polyoxyethylene ether sulfate, dipentaerythritol hexahydroxy stearate, leveling agent, acetic acid and water into a dye liquor barrel in a nonsequential manner according to parts by weight, stirring for 10min, heating to 50 ℃ at a bath ratio of 1:50, continuously stirring for 40min, conveying the dye liquor into a dyeing machine, heating the temperature of the dye liquor in the dyeing machine to 75 ℃, heating the temperature of the dye liquor in the dyeing machine to 135 ℃, preserving the temperature for 50min, cooling the temperature of the dye liquor in the dyeing machine to 70 ℃, and finishing dyeing.

7. The dyeing process of the polyester fabric according to claim 6, characterized in that: in the S4 dyeing process, firstly, the dye solution is heated to 75 ℃ at the heating rate of 1.8 ℃/min, then the dyeing process is carried out for 5min, and then the dye solution is heated to 135 ℃ at the heating rate of 1.2 ℃/min; and finally, cooling the dye liquor after heat preservation at a cooling speed of 2.4 ℃/min and then cooling the dye liquor by 70 ℃.

8. The dyeing process of the polyester fabric according to claim 1, characterized in that: s8, setting, namely, putting the grey cloth after the scutching in the S7 mode into a heat setting machine, adjusting the temperature of the heat setting machine to 170 ℃, preserving the heat for 45S, and cooling after the heat setting, wherein the cooling temperature is 25 ℃, and the cooling time is 40 min.

Technical Field

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

Background

Terylene is a synthetic fiber with wide application and excellent comprehensive performance in textiles. Sizing is carried out before weaving the polyester filament fabric, so that the surface of a strand silk is coated with a smooth, flexible and firm size film to enhance the cohesive force and the wear resistance of the polyester filament, so that the polyester filament fabric can bear various friction forces and tension forces in the weaving process, and the weaving production is smoothly carried out under the requirements of high quality and high yield.

The polyester fiber is a hydrophobic fiber made of polyethylene terephthalate, and cannot be dyed by direct dyes, acid dyes, basic dyes and the like due to the fact that polyester molecular chain structures are compact and hydrophilic groups such as carboxyl groups, sulfo groups and the like are lacked, and most of the existing dyeing methods adopt disperse dyes for dyeing under the conditions of high temperature and high pressure, hot melting or existence of carriers.

Since the polyester fiber adopts the disperse dye, and the gaps among the polyester fiber molecules are small and lack of hydrophilic groups, the color fastness of the polyester fabric dyed by the disperse dye is low, and therefore, a dyeing process of the polyester fabric with high color fastness is urgently needed.

Disclosure of Invention

The invention aims to provide a dyeing process of a polyester fabric, which can improve the color fastness of polyester fabric dyeing.

The technical purpose of the invention is realized by the following technical scheme:

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

s1: presetting, namely presetting the grey cloth;

s2: desizing, namely desizing the grey cloth treated by the S1;

s3: washing and neutralizing, namely washing and neutralizing the grey cloth treated by the S2;

s4: dyeing, namely dyeing the grey cloth neutralized by water washing, wherein the used dyes comprise the following components in parts by weight: 15-25 parts of disperse dye, 10-20 parts of dispersing agent, 2-6 parts of glycerol, 1-3 parts of isooctanoic acid polyoxyethylene ether sulfate, 3-8 parts of dipentaerythritol hexahydroxy stearate, 40-80 parts of leveling agent, 3-9 parts of acetic acid and 150 parts of water as well as 210 parts of water;

s5: continuously cleaning, namely continuously cleaning the grey cloth processed by the S4;

s6: dehydrating, namely dehydrating the grey cloth processed by the S5;

s7: scutching, namely scutching the grey cloth processed by the S6;

s8: shaping, namely shaping the grey cloth processed by the S7;

and the grey cloth shaped by S8 is the dyed terylene fabric.

By adopting the technical scheme, the disperse dye belongs to the special dye for the polyester fabric due to small molecular structure volume, and can be dyed among polyester fiber molecules under the action of the dispersing agent. The glycerol is an excellent wetting agent and penetrating agent, and has a wetting effect on the disperse dye on one hand, and can enhance the permeability of the disperse dye in the polyester fiber on the other hand, so that the dye uptake of the disperse dye in the polyester fiber molecules can be increased. The isooctanoic acid polyoxyethylene ether sulfate can promote the dispersibility of the disperse dye in water, and simultaneously, the isooctanoic acid polyoxyethylene ether sulfate and the dipentaerythritol hexahydroxystearate have the combined action, so that the intermolecular acting force between the disperse dye and polyester fiber molecules is improved, the bonding fastness between the disperse dye and the polyester fiber is improved, and finally, the color fastness of the disperse dye to polyester fabrics can be improved.

Due to the existence of the leveling agent, the polyester fibers can be dyed more uniformly by the disperse dye, and the generation of loose color after dyeing of the polyester fabric is reduced, so that the decolorization in the subsequent polyester fabric washing process is less, and the waste of the disperse dye is reduced.

As a further improvement of the present invention, the dispersant is sodium lignosulfonate.

By adopting the technical scheme, the sodium lignosulfonate can promote the disperse dye to be uniformly dispersed in the dye solution, so that the disperse dye is prevented from agglomerating. Meanwhile, due to the existence of the glycerol, the dispersion effect of the sodium lignosulfonate in the dye liquor can be improved, so that the disperse dye can be dispersed more uniformly.

As a further improvement of the invention, the dispersant also comprises sodium dodecyl benzene sulfonate and sodium succinate, and the mass ratio of the sodium lignin sulfonate, the sodium dodecyl benzene sulfonate and the sodium succinate is 4:8: 3.

By adopting the technical scheme, the sodium lignosulfonate and the sodium dodecyl benzene sulfonate act together to enable the disperse dye to have a compatibilization effect, and simultaneously, the sodium succinate, the sodium lignosulfonate and the sodium dodecyl benzene sulfonate act together to promote the disperse dye to enter polyester fiber molecules more quickly, so that the dye uptake of the disperse dye to polyester fibers is improved.

As a further improvement of the invention, after S5 continuous cleaning, the gray fabric is soaked for 20-30min by using a color fixing solution with a color fixing agent, wherein the bath ratio is 1: 50; the raw material of the color fixing agent comprises triethylene tetramine.

As a further improvement of the invention, the raw materials of the color fixing agent comprise, by weight, 40-60 parts of triethylene tetramine, 10-15 parts of pentaerythritol stearate and 20-50 parts of sodium trimetaphosphate.

By adopting the technical scheme, firstly, the triethylene tetramine is alkaline in the water solution, and the affinity between the disperse dye and the polyester fiber can be improved when the triethylene tetramine is dissolved in water. Pentaerythritol stearate can improve the lubricating effect between triethylene tetramine and terylene, and sodium trimetaphosphate and triethylene tetramine act together to combine together with terylene fibers in the form of van der Waals force, so that the acting force of triethylene tetramine and terylene fibers can be improved, and the acting time of triethylene tetramine on the terylene fibers is longer. The loose color on the polyester grey cloth can be removed through soaking the polyester grey cloth, so that more loose colors generated by migration of the disperse dye from the polyester fiber under subsequent high-temperature setting are avoided, and the waste of the disperse dye is reduced.

As a further improvement of the invention, the S4 dyeing is that firstly, disperse dye, dispersant, glycerol, isooctanoic acid polyoxyethylene ether sulfate, dipentaerythritol hexahydroxy stearate, leveling agent, acetic acid and water are added into a dye liquor barrel and stirred for 10min in a nonsequential manner according to parts by weight, the bath ratio is 1:50, the temperature is heated to 50 ℃, the stirring is continued for 40min, then the dye liquor is conveyed into a dyeing machine, the temperature of the dye liquor in the dyeing machine is raised to 75 ℃, then the temperature of the dye liquor is raised to 135 ℃, the temperature is kept for 50min, then the temperature of the dye liquor in the dyeing machine is lowered to 70 ℃, and the dyeing is finished.

By adopting the technical scheme, the temperature is controlled to be 75 ℃ in the initial dyeing stage, so that the condition that the dyeing is not uniform due to too high temperature in the initial dyeing stage is avoided. The dyeing of the polyester fabric can enable most of the dye liquor to be dyed on the polyester fabric in the process that the temperature is increased to 135 ℃ at 75 ℃, then the temperature is increased to 135 ℃, and the subsequent dye liquor can be dyed on a small part of the polyester fabric, so that the dyeing rate of the fabric can be improved.

As a further improvement of the invention, in the S4 dyeing, the dye solution is heated to 75 ℃ at the heating rate of 1.8 ℃/min, then the dyeing is carried out for 5min, and then the dye solution is heated to 135 ℃ at the heating rate of 1.2 ℃/min; and finally, cooling the dye liquor after heat preservation at a cooling speed of 2.4 ℃/min and then cooling the dye liquor by 70 ℃.

By adopting the technical scheme, in the initial dyeing stage, the temperature rise rate is controlled to be 1.8 ℃/min, so that the dyeing liquid can be ensured to be uniformly dyed on the terylene grey cloth on the premise of improving the dyeing rate. The temperature is kept for 5min, so that the disperse dye can be dyed more completely. At the moment, most of the dye liquor is dyed on the terylene grey cloth, the heating rate is reduced, and the subsequent dyeing is more uniform. And finally, controlling the cooling rate at 2.4 ℃/min, so that the dye can be fixed on the polyester grey cloth, and the color fastness of the final polyester cloth is improved. The cooling rate is accelerated, and the dye can be prevented from being decomposed during cooling.

As a further improvement of the invention, the step S8 of shaping is that the grey cloth after being scutched through the step S7 is put into a heat-shaping machine, then the temperature of the heat-shaping machine is adjusted to 170 ℃, the temperature is kept for 45S, and cooling is carried out after heat-shaping, the cooling temperature is 25 ℃, and the cooling time is 40 min.

By adopting the technical scheme, after the terylene cloth enters the heat setting machine, the terylene cloth is kept warm for 45s after the temperature reaches 170 ℃, the size of the terylene cloth is completely stabilized, the warp deviation and the weft deviation of the terylene cloth cannot occur, and the terylene cloth is also completely dried within the temperature and the time, so the smooth, strong and stiff hand feeling of the terylene cloth is effectively enhanced; then cooling the polyester fabric to 25 ℃ after 40min to prevent the fabric from being damaged due to too high cooling speed.

In conclusion, the invention has the advantages and beneficial effects that:

1. the isooctanoic acid polyoxyethylene ether sulfate can promote the dispersibility of the disperse dye in water, and simultaneously, the isooctanoic acid polyoxyethylene ether sulfate and dipentaerythritol hexahydroxystearate have a combined action to improve the intermolecular acting force between the disperse dye and polyester fiber molecules, so that the bonding fastness between the disperse dye and the polyester fiber is improved, and the color fastness of the disperse dye to polyester fabrics can be finally improved;

2. the sodium lignosulfonate and the sodium dodecyl benzene sulfonate act together, so that the disperse dye has a compatibilization effect, and meanwhile, under the combined action of the sodium succinate, the sodium lignosulfonate and the sodium dodecyl benzene sulfonate, the disperse dye can be promoted to enter polyester fiber molecules more quickly, so that the dye uptake of the disperse dye to polyester fibers is improved;

3. triethylene tetramine is alkaline in aqueous solution, and the affinity between disperse dye and polyester fiber can be improved when the triethylene tetramine is dissolved in water. Pentaerythritol stearate can improve the lubricating effect between triethylene tetramine and terylene, and sodium trimetaphosphate and triethylene tetramine act together to combine together with terylene fibers in the form of van der Waals force, so that the acting force of triethylene tetramine and terylene fibers can be improved, and the acting time of triethylene tetramine on the terylene fibers is longer. The loose color on the polyester grey cloth can be removed through soaking the polyester grey cloth, so that more loose colors generated by migration of the disperse dye from the polyester fiber under subsequent high-temperature setting are avoided, and the waste of the disperse dye is reduced.

Drawings

FIG. 1 is a process flow diagram of a dyeing process of a polyester fabric.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.