CN103243588A - Method for dyeing terylene textile at high temperature and under high pressure - Google Patents

Abstract

The invention relates to a method for high-temperature and high-pressure dyeing of polyester textiles, belonging to the field of textile printing and dyeing processing. The dyeing method of the present invention adopts the dye solution mixed with a high proportion of alcohol organic solvent and a small amount of water and disperse dyes to dye polyester textiles under high temperature and high pressure conditions, which can better improve the dispersibility of disperse dyes and increase the The utilization rate of fiber and the dyeing rate of fibers can avoid dyeing defects such as colored flowers, stains, and stripes. At the same time, it can reduce the difficulty of dyeing, improve the dyeing effect, and improve the dyeing quality. It solves the problems of difficult dyeing, poor level dyeing, large water consumption and serious pollution in the traditional high-temperature and high-pressure dyeing process of polyester textiles. The alcohol organic solvent used in the invention is safe, non-toxic and easy to recycle, not only greatly reduces the water consumption in the dyeing process, but also reduces the discharge of waste liquid, is safe, energy-saving, clean and environmentally friendly.

Description

A method for high temperature and high pressure dyeing of polyester textiles

technical field

The invention relates to a method for high-temperature and high-pressure dyeing of polyester textiles, belonging to the field of textile printing and dyeing processing.

Background technique

The conventional polyester high-temperature and high-pressure dyeing method is carried out in a closed dyeing device with a temperature higher than 100 ° C, which belongs to a damp heat dyeing method. This method is usually performed in water. On the one hand, due to factors such as dyeing mechanical properties, heating speed during dyeing, and the performance of disperse dyes, the dispersibility of the dye will be reduced, the dye will undergo secondary aggregation, or the dye will cause color and flowering due to poor compatibility of the dye. Dyeing defects such as stains and stripes will affect the quality. On the other hand, due to the need to consume a large amount of water resources in the entire dyeing process, the dyeing has serious environmental pollution, and it is difficult to recycle the waste water after dyeing, and the cost is relatively high.

For this reason, many researchers began to study the technology of improving the performance of polyester high temperature and high pressure dyeing and polyester anhydrous or less water dyeing.

The open magazine "Tianjin Textile Science and Technology", the second issue of 2007 titled "Application of Ultrasonic Waves in Polyester Fabric Dyeing" mentioned the method of applying ultrasonic waves to polyester fabric dyeing, although this method can indeed gather disperse dyes. The body is smashed to make the dispersion more stable and accelerate the diffusion speed of the disperse dye inside the fiber, but its shortcoming is that it does not fundamentally solve the problems such as color flowers in the polyester dyeing process, and the ultrasonic wave in the polyester dyeing process The application process is complicated, the conditions are harsh, the cost is high, and it is difficult to realize industrialization, and this method does not solve the problem of large water consumption in the dyeing process.

Chinese Patent Publication No. CN1970881A, date of publication May 30, 2007, the name of the invention is a low-temperature plasma combined with co-solvent polyester dyeing method, the application discloses a polyester dyeing method. Although the method of treating polyester with low-temperature plasma combined with co-solvent before dyeing can indeed achieve the effect of normal-pressure low-temperature dyeing and energy saving of polyester, its disadvantage is that the process is complicated, and the co-solvent used is composed of benzene Methanol, chlorobenzene, dichlorobenzene, etc., which are mostly toxic substances and difficult to recycle.

Chinese patent application publication number CN102776790A, the application publication date is July 10, 2012, and the name of the invention is a method for anhydrous dyeing of disperse dyes. The application discloses a method for dyeing polyester with disperse dyes. Although it uses ionic liquid as a solvent to dissolve disperse dyes to dye polyester and use alcohol and other organic solvents to recover ionic liquids and dyes after dyeing, it does play a pollution-free and clean role, but its shortcomings are The cost of recovering the ionic liquid is relatively high, and the ionic liquid is relatively expensive, and reagents such as wetting agents need to be added.

Chinese patent application publication number CN102140765, the application publication date is August 3, 2011, and the name of the invention is the high-efficiency and rapid dyeing non-cleaning process of polyester fabric and its application method. The application discloses a method for non-cleaning after polyester dyeing. Although the process it adopts can indeed reduce the COD value of the residual liquid and eliminate the need for cleaning, it saves energy. But its shortcoming is that this method does not greatly reduce the amount of water used in the dyeing process, and phenomena such as color flowers may appear in the dyeing process.

Chinese Patent Publication No. CN1132288A, date of publication is October 2, 1996. The name of the invention is a new process for improving the levelness of polyester high-temperature and high-pressure dyeing. The application discloses a method for improving the levelness of polyester high-temperature and high-pressure dyeing. process, although the method it adopts to improve the level dyeing property by improving the dyeing process does have the effect of making the color of the dyed product uniform. However, its shortcoming is that the process is only based on the process technology itself, and does not solve the problem of large water consumption.

Contents of the invention

In view of the above problems, in order to improve the high temperature and high pressure dyeing effect of polyester textiles and reduce the water consumption in the dyeing process, the purpose of the present invention is to provide a method for changing the configuration of dyeing liquor and washing liquid in the high temperature and high pressure dyeing process of polyester textiles, through Dyeing polyester textiles with high-temperature and high-pressure dyeing liquid mixed with a high proportion of alcoholic organic solvents and a small amount of water and disperse dyes, and washing the dyed polyester textiles with a washing liquid mixed with alcoholic organic solvents and a small amount of water .

In order to achieve the above object, the technical solution of the present invention is:

A method for high-temperature and high-pressure dyeing of polyester textiles, comprising dye liquor preparation, dyeing, washing liquid preparation, washing and post-treatment in the high-temperature and high-pressure dyeing process of polyester textiles:

The dye liquor preparation in the high-temperature and high-pressure dyeing process of polyester textiles refers to placing disperse dyes, dispersants and acid buffers in a mixture of alcoholic organic solvents and water, and mixing them evenly to prepare a dye liquor. The bath ratio of the liquid is 1:30~1:60, the volume ratio of the alcoholic organic solvent to water is 95%~50%:5%~50%, and the concentration of the disperse dye is 1%~5% of the mass of the polyester textile. The concentration of dispersant is 0.5~2g/L, and the concentration of acid buffer is 1~3g/L.

The preparation of the washing solution in the high temperature and high pressure dyeing process of polyester textiles refers to placing soap flakes and sodium carbonate in the mixed solution of alcohol organic solvent and water, stirring evenly to prepare the washing solution, wherein the liquor ratio of the washing solution is 1:25~1:35, the volume ratio of alcohol organic solvent and water is 95%~50%:5%~50%, the concentration of soap flakes is 1~3g/L, and the concentration of sodium carbonate is 1~3g /L.

The polyester textile is one of polyester loose fibers or polyester yarns or polyester woven fabrics or polyester knitted fabrics.

The alcoholic organic solvent is one of ethanol or isopropanol.

The dispersant is one of sodium lignosulfonate or phenolic condensate sodium sulfonate or nonionic surfactant or anionic surfactant.

The acid buffer is one of sodium acetate, ammonium dihydrogen phosphate or ammonium sulfate.

Due to the adoption of the above technical scheme, the technical features of the present invention are: the technical scheme of the present invention adopts the method of changing the configuration of dyeing liquor and washing liquid in the high-temperature and high-pressure dyeing process of polyester textiles, by combining a high proportion of alcoholic organic solvent and a small amount of water with The dyeing solution mixed with disperse dyes is used for high temperature and high pressure dyeing of polyester textiles, and the dyed polyester textiles are washed with a washing solution mixed with alcohol organic solvents and a small amount of water. Since the molecules of alcoholic organic solvents are larger than water, when the temperature is higher than the glass transition temperature of polyester, alcoholic organic solvents will increase the pores that accommodate dye molecules generated by the molecular chain activity of the amorphous region of polyester, so that the dissolved The dye in the dye solution will enter the polyester, and the dye on the surface of the polyester will diffuse and dye into the fiber in molecular form. At this time, the dye also accelerates the molecular motion due to the increase in temperature, changes from the dispersed state to the dissolved or soluble state, and diffuses to the amorphous region of the fiber until the dye is adsorbed by the fiber and the rate of desorption of the dye from the fiber is equal. , The dyeing process is completed when the dyeing reaches equilibrium. Due to the effect of the dispersant on the dye in the alcoholic organic solvent, the disperse dye in the alcoholic organic solvent is dissolved by the crystal particle and aggregated on the surface of the fiber under the action of the dispersant. The finer the single molecule of the dye is The better the dyeing levelness is. The dispersant in the dye molecule can form a layer of interfacial film on the surface of the fiber, so that the dye molecule attached to the fiber surface can gradually diffuse into the inside of the fiber, so it can well avoid the phenomenon of color flower caused by instant dyeing, thereby improving the staining effect. The addition of alcoholic organic solvents reduces the surface tension of the dye solution and reduces the difficulty of polyester dyeing. The alcoholic organic solvents also greatly reduce the amount of water in the process of dyeing and washing. Moreover, the alcoholic organic solvents are non-toxic and can realize the closed cycle of polyester. Dyeing, alcohol organic solvents after dyeing can also be recovered and recycled through the recovery system. Therefore, the invention solves the problems of difficult dyeing, poor level dyeing, large water consumption and serious pollution in the traditional high-temperature and high-pressure dyeing process of polyester textiles.

The method for polyester high-temperature and high-pressure dyeing of the present invention can better improve the dispersing properties of disperse dyes, increase the utilization rate of dyes and the dyeing rate to fibers, avoid dyeing defects such as color spots, stains, and stripes, and simultaneously It can reduce the dyeing difficulty, improve the dyeing effect and improve the dyeing quality. The alcoholic organic solvent used in the method of the invention is safe, non-toxic and easy to recycle, not only greatly reduces the amount of water used in the dyeing process, but also reduces the discharge of waste liquid, which is safe, energy-saving, clean and environmentally friendly.

Detailed ways

Below in conjunction with specific embodiment the present invention is described in detail.

A method for dyeing polyester textiles under high temperature and high pressure. The polyester textiles to be dyed are polyester loose fibers or polyester yarns, polyester woven fabrics or polyester knitted fabrics. The specific steps of the method for high temperature and high pressure dyeing of polyester textiles are as follows:

a Dye preparation

Put disperse dyes, dispersants and acid buffers in a mixture of alcoholic organic solvents and water, stir evenly to prepare a dyeing solution, wherein the bath ratio of the dyeing solution is 1:30~1:60, alcoholic organic solvents The volume ratio of solvent and water is 95%~50%:5%~50%, the concentration of disperse dye is 1%~5% of the quality of polyester textile, the concentration of dispersant is 0.5~2g/L, the concentration of acid buffer 1~3g/L. The alcoholic organic solvent is one of ethanol or isopropanol. The dispersant is one of sodium lignosulfonate or phenolic condensate sodium sulfonate or nonionic surfactant or anionic surfactant. The acid buffer is one of sodium acetate or ammonium dihydrogen phosphate or ammonium sulfate.

b staining

Place the dye liquor and polyester textiles in a high-temperature and high-pressure dyeing machine, then raise the temperature of the dye liquor to 120-130°C at a rate of 1-2°C/min, and the dyeing time is 25-35 minutes.

c Washing solution preparation

Put the soap flakes and sodium carbonate in the mixed solution of alcoholic organic solvent and water, stir evenly and prepare washing liquid, wherein, the bath ratio of the washing liquid is 1:25~1:35, the alcoholic organic solvent and water The volume ratio is 95%~50%:5%~50%, the concentration of soap flakes is 1~3g/L, and the concentration of sodium carbonate is 1~3g/L. The alcoholic organic solvent is one of ethanol or isopropanol.

d washing

The polyester textile after dyeing is put into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes.

e Post-processing

The polyester textiles after washing are dried, and the drying temperature is 80°C.

specific embodiment

Embodiment one:

According to the above process steps: select 1g of polyester loose fiber as the textile to be dyed. Put disperse dyes, sodium lignosulfonate and sodium acetate in a mixture of alcoholic organic solvents and water, stir evenly to prepare a dye solution, wherein the bath ratio of the dye solution is 1:60, the volume of ethanol and water The ratio is 95%:5%, the concentration of disperse dye is 5% of the mass of polyester bulk fiber, the concentration of sodium lignosulfonate is 2g/L, and the concentration of sodium acetate is 3g/L. The dye liquor and polyester textiles are placed in a high-temperature and high-pressure dyeing machine, and then the dye liquor is heated to 130° C. at a speed of 2° C./min, and the dyeing time is 35 minutes. Soap flakes and sodium carbonate are placed in the mixed solution of ethanol and water, and the washing liquid is prepared after stirring evenly, wherein, the bath ratio of the washing liquid is 1:35, and the volume ratio of ethanol and water is 95%:5%. The concentration of the tablet is 3g/L, and the concentration of sodium carbonate is 3g/L. Put the polyester loose fiber after dyeing into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes. The washed polyester loose fiber is dried, and the drying temperature is 80°C.

Embodiment two:

According to the above process steps: select 1g of polyester loose fiber as the textile to be dyed. Put disperse dyes, phenolic condensate sodium sulfonate and ammonium dihydrogen phosphate in a mixture of isopropanol and water, stir evenly and prepare a dye solution, wherein the bath ratio of the dye solution is 1:30, isopropanol and water The volume ratio is 50%:50%, the concentration of disperse dye is 1% of polyester bulk fiber, the concentration of phenolic condensate sodium sulfonate is 0.5g/L, and the concentration of ammonium dihydrogen phosphate is 1g/L. Place the dyeing liquor and polyester loose fibers in a high-temperature and high-pressure dyeing machine, then raise the temperature of the dyeing liquor to 120°C at a rate of 1°C/min, and the dyeing time is 25 minutes. Put the soap flakes and sodium carbonate in the mixed solution of isopropanol and water, stir it evenly and prepare the washing solution, wherein the bath ratio of the washing solution is 1:25, and the volume ratio of isopropanol and water is 50%:50% , the concentration of soap flakes is 1g/L, and the concentration of sodium carbonate is 1g/L. Put the polyester loose fiber after dyeing into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes. The washed polyester loose fiber is dried, and the drying temperature is 80°C.

Embodiment three:

According to the above process steps: select 1g of polyester loose fiber as the textile to be dyed. Disperse dyes, non-ionic surfactants and ammonium sulfate are placed in a mixture of ethanol and water, stirred evenly to prepare a dye solution, wherein the bath ratio of the dye solution is 1:45, and the volume ratio of ethanol and water is 70%:30%, the concentration of disperse dye is 3% of the mass of polyester bulk fiber, the concentration of nonionic surfactant is 1g/L, and the concentration of ammonium sulfate is 2g/L. Place the dye liquor and polyester loose fibers in a high-temperature and high-pressure dyeing machine, then raise the temperature of the dye liquor to 125°C at a rate of 1.5°C/min, and the dyeing time is 30 minutes. Soap flakes and sodium carbonate are placed in the mixed solution of ethanol and water, and the washing liquid is prepared after stirring evenly, wherein, the bath ratio of the washing liquid is 1:30, and the volume ratio of ethanol and water is 70%:30%. The concentration of the tablet is 2g/L, and the concentration of sodium carbonate is 2g/L. Put the polyester loose fiber after dyeing into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes. The polyester textiles after washing are dried, and the drying temperature is 80°C.

Embodiment four:

According to the above process steps: select 1g of polyester yarn as the textile to be dyed. Put disperse dyes, anionic surfactants and sodium acetate in a mixture of isopropanol and water, stir evenly to prepare a dye solution, wherein the bath ratio of the dye solution is 1:60, and the volume ratio of isopropanol to water It is 95%: 5%, the concentration of disperse dye is 5% of polyester yarn, the concentration of anionic surfactant is 2g/L, and the concentration of sodium acetate is 3g/L. The dye liquor and the polyester yarn are placed in a high-temperature and high-pressure dyeing machine, and then the dye liquor is heated up to 130° C. at a speed of 2° C./min, and the dyeing time is 35 minutes. Soap flakes and sodium carbonate are placed in the mixture of ethanol and water, stirred evenly, and then prepared into a washing liquid, wherein, the bath ratio of the washing liquid is 1:35, and the volume ratio of the alcoholic organic solvent to water is 95%:5 %, the concentration of soap flakes is 3g/L, and the concentration of sodium carbonate is 3g/L. The polyester yarn after dyeing is put into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes. The polyester yarn after washing is dried, and the drying temperature is 80°C.

Embodiment five:

According to the above process steps: select 1g of polyester yarn as the textile to be dyed. Put disperse dyes, sodium lignosulfonate and sodium acetate in a mixture of ethanol and water, stir evenly to prepare a dye solution, wherein the bath ratio of the dye solution is 1:30, and the volume ratio of ethanol and water is 50 %: 50%, the concentration of disperse dye is 1% of the quality of polyester yarn, the concentration of sodium lignosulfonate is 0.5g/L, and the concentration of sodium acetate is 1g/L. Place the dyeing solution and polyester yarn in a high-temperature and high-pressure dyeing machine, then raise the temperature of the dyeing solution to 120° C. at a rate of 1° C./min, and the dyeing time is 25 minutes. Soap flakes and sodium carbonate are placed in the mixed solution of ethanol and water, and the washing liquid is prepared after stirring evenly, wherein, the bath ratio of the washing liquid is 1:25, and the volume ratio of ethanol and water is 50%:50%. The concentration of the tablet is 1g/L, and the concentration of sodium carbonate is 1g/L. The polyester yarn after dyeing is put into the washing solution for washing, the washing temperature is 95°C, and the washing time is 10 minutes. The polyester yarn after washing is dried, and the drying temperature is 80°C.

Embodiment six:

According to the above process steps: select 1g of polyester yarn as the textile to be dyed. Put disperse dyes, phenolic condensate sodium sulfonate and ammonium dihydrogen phosphate in a mixture of isopropanol and water, stir evenly to prepare a dye solution, wherein the bath ratio of the dye solution is 1:50, isopropanol and water The volume ratio is 60%:40%, the concentration of disperse dye is 3% of the quality of polyester yarn, the concentration of phenolic condensate sodium sulfonate is 1g/L, and the concentration of ammonium dihydrogen phosphate is 2g/L. The dye liquor and polyester yarn are placed in a high-temperature and high-pressure dyeing machine, and then the dye liquor is heated up to 125° C. at a rate of 1.5° C./minute, and the dyeing time is 30 minutes. Put soap flakes and sodium carbonate in a mixture of isopropanol and water, stir evenly, and prepare a washing liquid, wherein the bath ratio of the washing liquid is 1:30, and the volume ratio of isopropanol and water is 60%:40% , the concentration of soap flakes is 2g/L, and the concentration of sodium carbonate is 2g/L. The polyester yarn after dyeing is put into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes. The polyester textiles after washing are dried, and the drying temperature is 80°C.

Embodiment seven:

According to the above process steps: select 1g of polyester woven fabric as the textile to be dyed. Disperse dyes, non-ionic surfactants and ammonium sulfate are placed in a mixture of ethanol and water, stirred evenly to prepare a dye solution, wherein the bath ratio of the dye solution is 1:60, and the volume ratio of ethanol and water is 95%: 5%, the concentration of disperse dye is 5% of the quality of polyester woven fabric, the concentration of nonionic surfactant is 2g/L, and the concentration of ammonium sulfate is 3g/L. The dye liquor and the polyester woven fabric are placed in a high-temperature and high-pressure dyeing machine, and then the dye liquor is heated up to 130° C. at a rate of 2° C./min, and the dyeing time is 35 minutes. Soap flakes and sodium carbonate are placed in the mixed solution of ethanol and water, and after stirring evenly, it is prepared into a washing liquid, wherein, the bath ratio of the washing liquid is 1:35, and the volume ratio of ethanol and water is 95%:5%. The concentration of the tablet is 3g/L, and the concentration of sodium carbonate is 3g/L. Put the polyester woven fabric after dyeing into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes. The polyester woven fabric after washing is dried, and the drying temperature is 80°C.

Embodiment eight:

According to the above process steps: select 1g of polyester woven fabric as the textile to be dyed. Put disperse dyes, anionic surfactants and sodium acetate in a mixture of isopropanol and water, stir evenly to prepare a dye solution, wherein the bath ratio of the dye solution is 1:30, and the volume ratio of isopropanol to water It is 50%:50%, the concentration of disperse dye is 1% of the mass of polyester woven fabric, the concentration of anionic surfactant is 0.5g/L, and the concentration of sodium acetate is 1g/L. The dye liquor and polyester woven fabric are placed in a high temperature and high pressure dyeing machine, then the dye liquor is heated to 120°C at a rate of 1°C/min, and the dyeing time is 25 minutes. Put the soap flakes and sodium carbonate in the mixed solution of isopropanol and water, stir it evenly and prepare the washing solution, wherein the bath ratio of the washing solution is 1:25, and the volume ratio of isopropanol and water is 50%:50% , the concentration of soap flakes is 1g/L, and the concentration of sodium carbonate is 1g/L. Put the polyester woven fabric after dyeing into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes. The polyester woven fabric after washing is dried, and the drying temperature is 80°C.

Embodiment nine:

According to the above process steps: select 1g of polyester woven fabric as the textile to be dyed. Put disperse dyes, sodium lignin sulfonate and ammonium dihydrogen phosphate in the mixture of ethanol and water, stir evenly to prepare a dye solution, wherein the liquor ratio of the dye solution is 1:50, and the volume ratio of ethanol and water It is 70%:30%, the concentration of disperse dye is 3% of the quality of polyester woven fabric, the concentration of sodium lignosulfonate is 1g/L, and the concentration of ammonium dihydrogen phosphate is 2g/L. The dye liquor and the polyester woven fabric are placed in a high-temperature and high-pressure dyeing machine, and then the dye liquor is heated up to 125° C. at a speed of 1.5° C./min, and the dyeing time is 30 minutes. Soap flakes and sodium carbonate are placed in the mixed solution of ethanol and water, and the washing liquid is prepared after stirring evenly, wherein, the bath ratio of the washing liquid is 1:30, and the volume ratio of ethanol and water is 70%:30%. The concentration of the tablet is 2g/L, and the concentration of sodium carbonate is 2g/L. Put the polyester woven fabric after dyeing into the washing solution for washing, the washing temperature is 95°C, and the washing time is 10 minutes. The polyester woven fabric after washing is dried, and the drying temperature is 80°C.

Embodiment ten:

According to the above process steps: select 1g of polyester knitted fabric as the textile to be dyed. Put disperse dyes, phenolic condensate sodium sulfonate and ammonium sulfate in a mixture of isopropanol and water, stir evenly to prepare a dye solution, wherein the bath ratio of the dye solution is 1:60, the volume of isopropanol and water The ratio is 95%:5%, the concentration of disperse dye is 5% of the mass of polyester knitted fabric, the concentration of phenolic condensate sodium sulfonate is 2g/L, and the concentration of ammonium sulfate is 3g/L. The dye liquor and polyester textiles are placed in a high-temperature and high-pressure dyeing machine, and then the dye liquor is heated to 130° C. at a speed of 2° C./min, and the dyeing time is 35 minutes. Put soap flakes and sodium carbonate in a mixture of isopropanol and water, stir well and prepare a washing solution, wherein the bath ratio of the washing solution is 1:35, and the volume ratio of isopropanol and water is 95%:5% , the concentration of soap flakes is 3g/L, and the concentration of sodium carbonate is 3g/L. The polyester knitted fabric after dyeing is put into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes. The polyester knitted fabric after washing is dried, and the drying temperature is 80°C.

Embodiment eleven:

According to the above process steps: select 1g of polyester knitted fabric as the textile to be dyed. Disperse dyes, nonionic surfactants and sodium acetate are placed in a mixture of ethanol and water, stirred evenly to prepare a dye solution, wherein the bath ratio of the dye solution is 1:30, and the volume ratio of ethanol and water is 50%:50%, the concentration of disperse dye is 1% of the mass of polyester knitted fabric, the concentration of nonionic surfactant is 0.5g/L, and the concentration of sodium acetate is 1g/L. Place the dye liquor and polyester knitted fabric in a high-temperature and high-pressure dyeing machine, then raise the temperature of the dye liquor to 120°C at a rate of 1°C/min, and the dyeing time is 25 minutes. Soap flakes and sodium carbonate are placed in the mixed solution of ethanol and water, and the washing liquid is prepared after stirring evenly, wherein, the bath ratio of the washing liquid is 1:25, and the volume ratio of ethanol and water is 50%:50%. The concentration of the tablet is 1g/L, and the concentration of sodium carbonate is 1g/L. The polyester knitted fabric after dyeing is put into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes. The polyester knitted fabric after washing is dried, and the drying temperature is 80°C.

Embodiment 12:

According to the above process steps: select 1g of polyester knitted fabric as the textile to be dyed. Disperse dyes, anionic surfactants and ammonium dihydrogen phosphate are placed in a mixture of isopropanol and water, stirred evenly to prepare a dye solution, wherein the bath ratio of the dye solution is 1:50, and the ratio of isopropanol and water The volume ratio is 70%:30%, the concentration of disperse dye is 1%~5% of the mass of polyester knitted fabric, the concentration of anionic surfactant is 1g/L, and the concentration of ammonium dihydrogen phosphate is 2g/L. Place the dye liquor and polyester knitted fabric in a high-temperature and high-pressure dyeing machine, then raise the temperature of the dye liquor to 125°C at a rate of 1.5°C/min, and the dyeing time is 30 minutes. Put soap flakes and sodium carbonate in a mixture of isopropanol and water, stir evenly and prepare a washing solution, wherein the bath ratio of the washing solution is 1:30, and the volume ratio of isopropanol and water is 70%:30% , the concentration of soap flakes is 2g/L, and the concentration of sodium carbonate is 2g/L. The polyester knitted fabric after dyeing is put into the washing solution for washing, the washing temperature is 95° C., and the washing time is 10 minutes. The polyester knitted fabric after washing is dried, and the drying temperature is 80°C. the

Claims (5)

1. A method for high-temperature and high-pressure dyeing of polyester textiles, comprising dye liquor preparation, dyeing, washing liquid preparation, washing and post-treatment in the high-temperature and high-pressure dyeing process of polyester textiles, characterized in that: The dye liquor preparation in the high-temperature and high-pressure dyeing process of polyester textiles refers to placing disperse dyes, dispersants and acid buffers in a mixture of alcoholic organic solvents and water, and mixing them evenly to prepare a dye liquor. The bath ratio of the liquid is 1:30~1:60, the volume ratio of the alcoholic organic solvent to water is 95%~50%:5%~50%, and the concentration of the disperse dye is 1%~5% of the mass of the polyester textile. The concentration of dispersant is 0.5~2g/L, the concentration of acid buffer is 1~3g/L; The preparation of the washing solution in the high temperature and high pressure dyeing process of polyester textiles refers to placing soap flakes and sodium carbonate in the mixed solution of alcohol organic solvent and water, stirring evenly to prepare the washing solution, wherein the liquor ratio of the washing solution is 1:25~1:35, the volume ratio of alcohol organic solvent and water is 95%~50%:5%~50%, the concentration of soap flakes is 1~3g/L, and the concentration of sodium carbonate is 1~3g /L. 2. A method for dyeing polyester textiles under high temperature and high pressure as claimed in claim 1, wherein the polyester textiles are one of polyester loose fibers, polyester yarns, polyester woven fabrics or polyester knitted fabrics. 3. The method for high-temperature and high-pressure dyeing of polyester textiles as claimed in claim 1, characterized in that: the alcohol organic solvent is one of ethanol or isopropanol. 4. the method for a kind of polyester textile high temperature and high pressure dyeing as claimed in claim 1 is characterized in that: described dispersant is lignosulfonate sodium or phenolic condensate sodium sulfonate or nonionic surfactant or anion A type of surfactant. 5. The method for high-temperature and high-pressure dyeing of polyester textiles as claimed in claim 1, wherein the acid buffer is one of sodium acetate, ammonium dihydrogen phosphate or ammonium sulfate.