Dyeing method of polyester fabric
During the dyeing process of polyester fabrics, the negative electrosorption property of the dispersed dye and the deposition of trichloromethylsilane are used to form surface modification, which solves the problem of the decreasing dye connectivity of polyester fabrics in high temperature and high pressure dyeing, and achieves higher dyeing stability and wear resistance.
Patent Information
- Application Number
- CN202411950819.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-03-14
AI Technical Summary
During the high temperature and high pressure dyeing process of polyester fabrics, the connectivity of dyes decreases, resulting in insufficient dyeing stability and wear resistance, and prone to color difference.
By utilizing the negative electrosorption property of the dispersed dye surface and the deposition of trichloromethylsilane, surface modification of the dispersed dye is formed, thereby improving the connection stability and wear resistance of the dye. The specific steps include mixing the dispersed dye with a sodium carbonate solution to form an emulsion, combining it with trichloromethylsilane after ultrasonic treatment, forming a hydroxylated dispersed dye, and performing roughening treatment under an alkaline environment.
It improves the connection stability and wear resistance of dispersed dyes on polyester fabrics, reduces the dyeing temperature, solves the impact of temperature on polyester fabrics, and effectively improves the stability and durability of the dyeing effect.
Smart Images
Figure BDA0005214826270000081 
Figure BDA0005214826270000091
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of fabrics, and particularly relates to a dyeing method for polyester fabrics. Background Art
[0002] Polyester fabric is a hydrophobic fiber-based fabric with densely arranged macromolecules, high glass transition temperature, high crystallinity, compact structure, and lack of active groups that bind to dyes. Therefore, it is difficult to dye, has poor dyeability, and dye molecules are not easy to enter the fiber. Therefore, polyester fabrics are often dyed with high temperature and high pressure. Although high temperature and high pressure dyeing can improve the molecular activity of polyester fabrics and promote the entry of disperse dyes into the interior of polyester fabrics, the high temperature environment destroys the activity of surfactants, resulting in the connectivity of disperse dyes on polyester fabrics, greatly reducing the stability of dyed polyester fabrics, and even causing color differences during the dyeing process. Summary of the invention
[0003] In view of the problems in the prior art, the present invention provides a dyeing method for polyester fabrics, which solves the defects of high temperature and high pressure dyeing of polyester fabrics, utilizes the negative electrical adsorption of the surface of disperse dyes and the deposition of trichloromethylsilane to form surface modification of disperse dyes, which not only improves the connection stability of disperse dyes on polyester fabrics, but also improves the wear resistance of disperse dyes.
[0004] In order to achieve the above technical objectives, the technical solution of the present invention is:
[0005] A method for dyeing polyester fabric comprises the following steps:
[0006] Step 1, putting disperse dye into water and stirring to form slurry, grinding for 20-30min, adding it to sodium carbonate solution to form emulsion, ultrasonic treatment for 20-30min, filtering and drying to obtain clean disperse dye, the mass ratio of disperse dye to water is 1:0.05-0.08, the stirring speed is 300-500r / min, the grinding temperature is 5-10°C, the grinding pressure is 0.5-0.6MPa, the mass ratio of slurry to sodium carbonate solution is 1:15-20, and the pH of emulsion is 8.0-8.5, the ultrasonic treatment temperature is 10-20°C, the ultrasonic frequency is 100-120kHz, and the drying The temperature is 20-40°C; the disperse dye is one or more of H-FRL purple, SA-2RL golden yellow, SA-GL yellow, SA-RL golden yellow, YT tender yellow, SE-3RLN orange, GS bright red, and FB red; this step utilizes the insolubility of the disperse dye in water, cooperates with the grinding treatment to form a wet grinding environment, and finely pulverizes the disperse dye particles, and simultaneously puts them into an alkaline environment to form a dispersed emulsified state. On this basis, the ultrasonic treatment produces a strong stripping, and the refined disperse dye is further dispersed. The charge control of the disperse dye by the alkaline environment and the emulsification effect of sodium carbonate are combined to improve the particle refinement of the disperse dye, and provide a large surface for subsequent deposition;
[0007] Step 2, adding trichloromethylsilane to ether and stirring evenly to form a spray liquid, then spraying the spray liquid into the reactor of disperse dye at a constant temperature, sealing and cooling, and then purging to obtain doped disperse dye; the mass ratio of trichloromethylsilane to ether is 1:10-15, the stirring speed for uniform stirring is 100-300r / min, the speed of the constant temperature spray is 1-2mL / min, and the spray area is 100-150cm 2 , the temperature is 70-75°C; the mass ratio of trichloromethylsilane to disperse dye in the spray liquid is 1:2-3, and the temperature of the sealed cooling is 40-45°C; the purging adopts nitrogen at 40°C, and the purging speed is 5-8mL / min. This step utilizes the solubility of trichloromethylsilane in ether to homogeneously disperse in the spray liquid. With the constant temperature spraying of the spray liquid, trichloromethylsilane and ether are directly converted into steam and enter into the reactor. With the adsorption of negative charges on the surface of the disperse dye, a good charge attraction is formed for the silicon atoms on the trichloromethylsilane, and the trichloromethylsilane is adsorbed to the surface of the disperse dye. In the sealed cooling, the trichloromethylsilane is formed into droplets, and has a certain fluidity and is evenly distributed on the surface of the disperse dye. At this time, the ether still maintains a good vapor state, achieving good gas-liquid separation; at the same time, the mass difference between the disperse dye and trichloromethylsilane can ensure that the trichloromethylsilane is wrapped on the surface of the disperse dye part, and will not affect the state of the disperse dye itself;
[0008] Step 3, placing the doped disperse dye in a reactor and standing for 20-30 minutes, then purging with nitrogen for 5-10 minutes to obtain a hydroxylated disperse dye, the atmosphere of the reactor is a mixed atmosphere of nitrogen and water vapor, and the volume ratio of nitrogen to water vapor is 100:6-9, and the standing temperature is 20-30°C; the nitrogen purging uses dry nitrogen, and the purging speed is 5-8mL / min; this step uses a standing method to convert the trichloromethylsilane on the surface of the disperse dye into trihydroxymethylsilane, at which time the silicon atom is positively charged and forms a stable connection with the internal disperse dye, while the exposed hydroxyl group is negatively charged, thereby ensuring that the trihydroxymethylsilane is stably formed on the surface of the disperse dye and forms a stable connection with the disperse dye, the silicon hydroxyl group and the disperse dye are both negatively charged on the surface, and the silicon hydroxyl group can be kept stable outward, so the electronegativity of the disperse dye surface is not weakened, but is enhanced to a certain extent, and at the same time, the electronegativity of the trihydroxymethylsilane can effectively improve the dispersibility of the disperse dye and improve the wear resistance of the disperse dye;
[0009] Step 4, placing the polyester fabric in an ethanol aqueous solution for ultrasonic treatment for 30-60 minutes, then adjusting the pH to 8 and continuing ultrasonic treatment for 20-30 minutes, filtering and drying to obtain a roughened polyester fabric with a clean surface, wherein the volume proportion of ethanol in the ethanol aqueous solution is 30-50%, the concentration of the polyester fabric in the ethanol aqueous solution is 100-300 g / L, the ultrasonic frequency of the ultrasonic treatment is 80-120 kHz, the temperature is 20-30° C., the pH is adjusted by sodium carbonate, and the ultrasonic frequency of the continued ultrasonic treatment is 70-90 kHz, the temperature is 10-20° C.; the drying temperature is 70-80° C.; This step uses the ethanol aqueous solution for ultrasonic treatment, and uses the ultrasonic peeling property to completely remove surface impurities, thereby improving the surface cleanliness of the polyester fabric. At the same time, during the addition of sodium carbonate, the solution is converted into an alkaline solution, the surface of the polyester fabric is corroded, the polyester surface is roughened, and the surface activity of the polyester fabric is increased, and the affinity of the polyester fabric with the dye can also be effectively improved;
[0010] Step 5, adding hydroxylated disperse dye, methyl cellulose and sodium carbonate to distilled water to form a dye solution, then putting the roughened polyester fabric into the dye solution for constant temperature dyeing for 30-50 minutes, taking it out and heating it for 5-10 minutes, then cooling it and washing it, and drying it to obtain the dyed polyester fabric, the mass ratio of the dye solution is: 10-12 parts of hydroxylated disperse dye, 0.1-0.4 parts of methyl cellulose, 3-5 parts of sodium carbonate, 100-110 parts of distilled water, the bath ratio of the roughened polyester fabric in the dye solution is 1:8-10, the temperature of the constant temperature dyeing is 40-45°C, the stirring speed is 100-400r / min, the heating temperature is 70-80°C; the temperature of the cooling water washing is 10-30°C; the temperature of the drying is 7 0-80°C; in this step, sodium carbonate is used to form a weak alkaline solution in water, which improves the dispersion stability of hydroxylated disperse dyes. In combination with the dispersibility of methyl cellulose, good stability can be formed. In combination with the surface activity of the roughened polyester fabric in an alkaline environment, the disperse dye is deposited on the surface of the polyester fabric. During the heating treatment process, the silanol groups form polycondensation at this temperature, which effectively improves the connection stability of the disperse dye on the polyester fabric. At the same time, the polycondensation between the silanol groups can improve the porous coating of the silicon-oxygen structure on the surface of the disperse dye and improve the wear resistance. At the same time, the liquid film of methyl cellulose is gelled to ensure the in-situ connection and reaction of trihydroxymethylsilane. Cooling and washing can not only form stability after dyeing, but also redissolve the methyl cellulose to achieve the purpose of removal.
[0011] It can be seen from the above description that the present invention has the following advantages:
[0012] 1. The present invention solves the defects of high temperature and high pressure dyeing of polyester fabrics, and utilizes the negative electrical adsorption of the disperse dye surface and the deposition of trichloromethylsilane to form surface modification of the disperse dye, which not only improves the connection stability of the disperse dye on the polyester fabric, but also improves the wear resistance of the disperse dye.
[0013] 2. The present invention utilizes spray adsorption and cooling deposition to effectively reduce the influence of ether on disperse dyes, ensures the deposition of trichloromethylsilane on the surface of disperse dyes, and covers the hydroxyl group on the surface of disperse dyes during in-situ hydrolysis, thereby improving the surface activity of disperse dyes.
[0014] 3. The present invention roughens the polyester fabric by weak alkali treatment, and combines it with infection treatment in an alkaline environment to achieve active connection on the surface of the polyester fabric, which not only reduces the dyeing temperature and solves the influence of temperature on the polyester fabric, but also uses chemical groups to fix the disperse dye, solving the thermal coagulation and thermal migration problems of the disperse dye. DETAILED DESCRIPTION
[0015] The present invention is described in detail with reference to the embodiments, but no limitation is imposed on the claims of the present invention.
[0016] Example 1
[0017] A method for dyeing polyester fabric comprises the following steps:
[0018] Step 1, putting disperse dye into water and stirring to form slurry, grinding for 20 minutes, adding it to sodium carbonate solution to form emulsion, ultrasonic treatment for 20 minutes, filtering and drying to obtain clean disperse dye, the mass ratio of the disperse dye to water is 1:0.05, the stirring speed is 300r / min, the grinding temperature is 5°C, the grinding pressure is 0.5MPa, the mass ratio of the slurry to the sodium carbonate solution is 1:15, and the pH of the emulsion is 8.0, the ultrasonic treatment temperature is 10°C, the ultrasonic frequency is 100kHz, and the drying temperature is 20°C; the disperse dye is YT tender yellow;
[0019] Step 2, adding trichloromethylsilane to ether and stirring evenly to form a spray liquid, then spraying the spray liquid into the reactor of disperse dye at a constant temperature, sealing and cooling, and then purging to obtain doped disperse dye; the mass ratio of trichloromethylsilane to ether is 1:10, the stirring speed for uniform stirring is 100r / min, the speed of the constant temperature spray is 1mL / min, and the spray area is 100cm 2 , the temperature is 70°C; the mass ratio of trichloromethylsilane to disperse dye in the spray liquid is 1:2, the temperature of the sealed cooling is 40°C; the purging uses nitrogen at 40°C, and the purging speed is 5mL / min;
[0020] Step 3, placing the doped disperse dye in a reactor and letting it stand for 20 minutes, then purging with nitrogen for 5-10 minutes to obtain a hydroxylated disperse dye, wherein the atmosphere of the reactor is a mixed atmosphere of nitrogen and water vapor, and the volume ratio of nitrogen to water vapor is 100:6-9, and the standing temperature is 20-30° C.; the nitrogen purging uses dry nitrogen, and the purging speed is 5-8 mL / min;
[0021] Step 4, placing the polyester fabric in an ethanol aqueous solution for ultrasonic treatment for 30-60 minutes, then adjusting the pH to 8 and continuing ultrasonic treatment for 20 minutes, filtering and drying to obtain a roughened polyester fabric with a clean surface, wherein the volume proportion of ethanol in the ethanol aqueous solution is 30%, the concentration of the polyester fabric in the ethanol aqueous solution is 100g / L, the ultrasonic frequency of the ultrasonic treatment is 80kHz, the temperature is 20°C, the pH is adjusted by sodium carbonate, and the ultrasonic frequency of the continued ultrasonic treatment is 70kHz, the temperature is 10-°C; the drying temperature is 70°C;
[0022] Step 5, adding hydroxylated disperse dye, methyl cellulose and sodium carbonate to distilled water to form a dye solution, then putting the roughened polyester fabric into the dye solution for constant temperature dyeing for 30 minutes, taking it out and heating it for 5 minutes, then cooling it and washing it, and drying it to obtain the dyed polyester fabric, the mass ratio of the dye solution is: 10 parts of hydroxylated disperse dye, 0.1 parts of methyl cellulose, 3 parts of sodium carbonate, and 100 parts of distilled water, the bath ratio of the roughened polyester fabric in the dye solution is 1:8, the temperature of the constant temperature dyeing is 40°C, the stirring speed is 100r / min, the heating temperature is 70°C; the temperature of the cooling water washing is 10°C; the temperature of the drying is 70°C.
[0023] Example 2
[0024] A method for dyeing polyester fabric comprises the following steps:
[0025] Step 1, putting disperse dye into water and stirring to form slurry, grinding for 30 minutes, adding it to sodium carbonate solution to form emulsion, ultrasonic treatment for 30 minutes, filtering and drying to obtain clean disperse dye, the mass ratio of the disperse dye to water is 1:0.08, the stirring speed is 500r / min, the grinding temperature is 10°C, the grinding pressure is 0.6MPa, the mass ratio of the slurry to the sodium carbonate solution is 1:20, and the pH of the emulsion is 8.5, the ultrasonic treatment temperature is 20°C, the ultrasonic frequency is 120kHz, and the drying temperature is 40°C; the disperse dye is GS scarlet;
[0026] Step 2, adding trichloromethylsilane to ether and stirring evenly to form a spray liquid, then spraying the spray liquid into the reactor of disperse dye at a constant temperature, sealing and cooling, and then purging to obtain doped disperse dye; the mass ratio of trichloromethylsilane to ether is 1:15, the stirring speed for uniform stirring is 300r / min, the speed of the constant temperature spray is 2mL / min, and the spray area is 150cm 2 , the temperature is 75°C; the mass ratio of trichloromethylsilane to disperse dye in the spray liquid is 1:3, the temperature of the sealed cooling is 45°C; the purging uses nitrogen at 40°C, and the purging speed is 8mL / min;
[0027] Step 3, placing the doped disperse dye in a reactor and letting it stand for 30 minutes, then purging with nitrogen for 10 minutes to obtain a hydroxylated disperse dye, the atmosphere of the reactor is a mixed atmosphere of nitrogen and water vapor, and the volume ratio of nitrogen to water vapor is 100:9, and the standing temperature is 30° C.; the nitrogen purging uses dry nitrogen, and the purging speed is 8 mL / min;
[0028] Step 4, placing the polyester fabric in an ethanol aqueous solution for ultrasonic treatment for 60 minutes, then adjusting the pH to 8 and continuing ultrasonic treatment for 30 minutes, filtering and drying to obtain a roughened polyester fabric with a clean surface, wherein the volume proportion of ethanol in the ethanol aqueous solution is 50%, the concentration of the polyester fabric in the ethanol aqueous solution is 300g / L, the ultrasonic frequency of the ultrasonic treatment is 120kHz, the temperature is 30°C, the pH is adjusted by sodium carbonate, and the ultrasonic frequency of the continued ultrasonic treatment is 90kHz, the temperature is 20°C; the drying temperature is 80°C;
[0029] Step 5, adding hydroxylated disperse dye, methyl cellulose and sodium carbonate to distilled water to form a dye solution, then putting the roughened polyester fabric into the dye solution for constant temperature dyeing for 50 minutes, taking it out and heating it for 10 minutes, then cooling it and washing it, and drying it to obtain the dyed polyester fabric, the mass ratio of the dye solution is: 11 parts of hydroxylated disperse dye, 0.4 parts of methyl cellulose, 4 parts of sodium carbonate, and 105 parts of distilled water, the bath ratio of the roughened polyester fabric in the dye solution is 1:9, the temperature of the constant temperature dyeing is 45°C, the stirring speed is 400r / min, the heating temperature is 80°C; the cooling water washing temperature is 30°C; the drying temperature is 80°C.
[0030] Example 3
[0031] A method for dyeing polyester fabric comprises the following steps:
[0032] Step 1, putting disperse dye into water and stirring to form slurry, grinding for 25 minutes, adding it to sodium carbonate solution to form emulsion, ultrasonic treatment for 25 minutes, filtering and drying to obtain clean disperse dye, the mass ratio of the disperse dye to water is 1:0.07, the stirring speed is 400r / min, the grinding temperature is 8°C, the grinding pressure is 0.6MPa, the mass ratio of the slurry to the sodium carbonate solution is 1:18, and the pH of the emulsion is 8.2, the ultrasonic treatment temperature is 15°C, the ultrasonic frequency is 110kHz, and the drying temperature is 30°C; the disperse dye is H-FRL purple;
[0033] Step 2, adding trichloromethylsilane to ether and stirring evenly to form a spray liquid, then spraying the spray liquid into the reactor of disperse dye at a constant temperature, sealing and cooling, and then purging to obtain doped disperse dye; the mass ratio of trichloromethylsilane to ether is 1:12, the stirring speed for uniform stirring is 200r / min, the speed of the constant temperature spray is 2mL / min, and the spray area is 140cm 2 , the temperature is 73°C; the mass ratio of trichloromethylsilane to disperse dye in the spray liquid is 1:2, the temperature of the sealed cooling is 43°C; the purging uses nitrogen at 40°C, and the purging speed is 7mL / min;
[0034] Step 3, placing the doped disperse dye in a reactor and letting it stand for 25 minutes, then purging with nitrogen for 8 minutes to obtain a hydroxylated disperse dye, the atmosphere of the reactor is a mixed atmosphere of nitrogen and water vapor, and the volume ratio of nitrogen to water vapor is 100:7, and the standing temperature is 25° C.; the nitrogen purging uses dry nitrogen, and the purging speed is 6 mL / min;
[0035] Step 4, placing the polyester fabric in an ethanol aqueous solution for ultrasonic treatment for 50 minutes, then adjusting the pH to 8 and continuing ultrasonic treatment for 25 minutes, filtering and drying to obtain a roughened polyester fabric with a clean surface, wherein the volume proportion of ethanol in the ethanol aqueous solution is 40%, the concentration of the polyester fabric in the ethanol aqueous solution is 150 g / L, the ultrasonic frequency of the ultrasonic treatment is 110 kHz, the temperature is 25° C., the pH is adjusted by sodium carbonate, and the ultrasonic frequency of the continued ultrasonic treatment is 80 kHz and the temperature is 15° C.; the drying temperature is 75° C.;
[0036] Step 5, adding hydroxylated disperse dye, methyl cellulose and sodium carbonate into distilled water to form a dye solution, then putting the roughened polyester fabric into the dye solution for constant temperature dyeing for 40 minutes, taking it out and heating it for 8 minutes, then cooling it and washing it, and drying it to obtain the dyed polyester fabric, the mass ratio of the dye solution is: 12 parts of hydroxylated disperse dye, 0.3 parts of methyl cellulose, 4 parts of sodium carbonate, and 110 parts of distilled water, the bath ratio of the roughened polyester fabric in the dye solution is 1:9, the temperature of the constant temperature dyeing is 43°C, the stirring speed is 300r / min, the heating temperature is 75°C; the temperature of the cooling water washing is 20°C; the temperature of the drying is 80°C.
[0037] Comparative Example 1
[0038] A method for dyeing polyester fabric comprises the following steps:
[0039] Step 1, putting disperse dye into water and stirring to form slurry, grinding for 25 minutes, adding it to sodium carbonate solution to form emulsion, ultrasonic treatment for 25 minutes, filtering and drying to obtain clean disperse dye, the mass ratio of the disperse dye to water is 1:0.07, the stirring speed is 400r / min, the grinding temperature is 8°C, the grinding pressure is 0.6MPa, the mass ratio of the slurry to the sodium carbonate solution is 1:18, and the pH of the emulsion is 8.2, the ultrasonic treatment temperature is 15°C, the ultrasonic frequency is 110kHz, and the drying temperature is 30°C; the disperse dye is FB red;
[0040] Step 2, placing the polyester fabric in an ethanol aqueous solution for ultrasonic treatment for 50 minutes, then adjusting the pH to 8 and continuing ultrasonic treatment for 25 minutes, filtering and drying to obtain a roughened polyester fabric with a clean surface, wherein the volume proportion of ethanol in the ethanol aqueous solution is 40%, the concentration of the polyester fabric in the ethanol aqueous solution is 150 g / L, the ultrasonic frequency of the ultrasonic treatment is 110 kHz, the temperature is 25° C., the pH is adjusted by sodium carbonate, and the ultrasonic frequency of the continued ultrasonic treatment is 80 kHz and the temperature is 15° C.; the drying temperature is 75° C.;
[0041] Step 3, adding clean disperse dye, methyl cellulose and sodium carbonate into distilled water to form a dye solution, then putting the roughened polyester fabric into the dye solution for constant temperature dyeing for 40 minutes, taking it out and heating it for 8 minutes, then cooling it and washing it, and drying it to obtain the dyed polyester fabric, the mass ratio of the dye solution is: 12 parts of clean disperse dye, 0.3 parts of methyl cellulose, 4 parts of sodium carbonate, and 110 parts of distilled water, the bath ratio of the roughened polyester fabric in the dye solution is 1:9, the temperature of the constant temperature dyeing is 43°C, the stirring speed is 300r / min, the heating temperature is 75°C; the temperature of the cooling water washing is 20°C; the temperature of the drying is 80°C.
[0042] Comparative Example 2
[0043] A method for dyeing polyester fabric comprises the following steps:
[0044] Step 1, putting disperse dye into water and stirring to form slurry, grinding for 25 minutes, adding it to sodium carbonate solution to form emulsion, ultrasonic treatment for 25 minutes, filtering and drying to obtain clean disperse dye, the mass ratio of the disperse dye to water is 1:0.07, the stirring speed is 400r / min, the grinding temperature is 8°C, the grinding pressure is 0.6MPa, the mass ratio of the slurry to the sodium carbonate solution is 1:18, and the pH of the emulsion is 8.2, the ultrasonic treatment temperature is 15°C, the ultrasonic frequency is 110kHz, and the drying temperature is 30°C; the disperse dye is H-FRL purple;
[0045] Step 2, placing the polyester fabric in an ethanol aqueous solution for ultrasonic treatment for 50 minutes, then adjusting the pH to 8 and continuing ultrasonic treatment for 25 minutes, filtering and drying to obtain a roughened polyester fabric with a clean surface, wherein the volume proportion of ethanol in the ethanol aqueous solution is 40%, the concentration of the polyester fabric in the ethanol aqueous solution is 150 g / L, the ultrasonic frequency of the ultrasonic treatment is 110 kHz, the temperature is 25° C., the pH is adjusted by sodium carbonate, and the ultrasonic frequency of the continued ultrasonic treatment is 80 kHz and the temperature is 15° C.; the drying temperature is 75° C.;
[0046] Step 3, adding clean disperse dye and leveling agent SE to distilled water and adjusting the pH to 6 with glacial acetic acid to obtain a dye solution, and then putting the roughened polyester fabric into the dye solution for high-temperature dyeing for 40 minutes, cooling and washing, and then drying to obtain the dyed polyester fabric, the mass ratio of the dye solution is: 12 parts of clean disperse dye, 12 parts of leveling agent SE, and 110 parts of distilled water, the bath ratio of the roughened polyester fabric in the dye solution is 1:9, the temperature of the high-temperature dyeing is 130°C, the heating rate is 2°C / min, the temperature of the cooling and washing is room temperature, and the drying temperature is 75°C.
[0047] Performance Testing
[0048] The dyed polyester fabrics of Examples 1-3 and Comparative Examples 1-2 were used as test samples to perform conventional performance tests, and the results are as follows:
[0049]
[0050]
[0051] From the data comparison of Examples 1-3 and Comparative Examples 1-2, it can be seen that the technical solution uses trichloromethylsilane to form siloxane active hydroxyl groups on the surface of disperse dyes, which can effectively improve the connection firmness of disperse dyes, solve the dependence of disperse dyes on surfactants, and also reduce the difficulty of dyeing polyester fabrics. The connection stability between polyester fabrics and disperse dyes is improved, and trichloromethylsilane is used to form hydrophobic and temperature-resistant siloxane materials. The dyed polyester fabrics of Examples 1-3 show good color fastness and excellent dyeing effect.
[0052] It is understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.
Claims
1. A method for dyeing polyester fabric, characterized in that: The steps include: Step 1, putting disperse dye into water and stirring to form slurry, grinding for 20-30 minutes, adding the slurry into sodium carbonate solution to form emulsion, ultrasonic treatment for 20-30 minutes, filtering and drying to obtain clean disperse dye; Step 2, adding trichloromethylsilane to ether and stirring evenly to form a spray liquid, then spraying the spray liquid into a disperse dye reaction kettle at a constant temperature, sealing and cooling, and then purging to obtain a doped disperse dye; Step 3, placing the doped disperse dye in a reaction kettle and letting it stand for 20-30 minutes, and then purging with nitrogen for 5-10 minutes to obtain a hydroxylated disperse dye; Step 4, placing the polyester fabric in an ethanol aqueous solution for ultrasonic treatment for 30-60 minutes, then adjusting the pH to 8 and continuing ultrasonic treatment for 20-30 minutes, filtering and drying to obtain a roughened polyester fabric with a clean surface; Step 5, adding hydroxylated disperse dye, methyl cellulose and sodium carbonate into distilled water to form a dye solution, then placing the roughened polyester fabric into the dye solution for constant temperature dyeing for 30-50 minutes, taking it out and heating it for 5-10 minutes, then cooling it down and washing it, and drying it to obtain the dyed polyester fabric.
2. The method for dyeing polyester fabric according to claim 1, characterized in that: The mass ratio of disperse dye to water in step 1 is 1:0.05-0.08, the stirring speed is 300-500r / min, the temperature of the grinding treatment is 5-10°C, and the grinding pressure is 0.5-0.6MPa.
3. The method for dyeing polyester fabric according to claim 1, characterized in that: The mass ratio of the slurry to the sodium carbonate solution in step 1 is 1:15-20, and the pH of the emulsion is 8.0-8.
5. The temperature of the ultrasonic treatment is 10-20°C, the ultrasonic frequency is 100-120kHz, and the drying temperature is 20-40°C.
4. The method for dyeing polyester fabric according to claim 1, characterized in that: The disperse dye in step 1 is one or more of H-FRL purple, SA-2RL golden yellow, SA-GL yellow, SA-RL golden yellow, YT light yellow, SE-3RLN orange, GS scarlet, and FB red.
5. The method for dyeing polyester fabric according to claim 1, characterized in that: The mass ratio of trichloromethylsilane to ether in step 2 is 1:10-15, the stirring speed for uniform stirring is 100-300r / min, the constant temperature spray speed is 1-2mL / min, and the spray area is 100-150cm 2 , the temperature is 70-75°C; the mass ratio of trichloromethylsilane to disperse dye in the spray liquid is 1:2-3, the temperature of the sealed cooling is 40-45°C; the purging uses nitrogen at 40°C, and the purging speed is 5-8mL / min.
6. The method for dyeing polyester fabric according to claim 1, characterized in that: The atmosphere of the reactor in step 3 is a mixed atmosphere of nitrogen and water vapor, and the volume ratio of nitrogen to water vapor is 100:6-9, and the standing temperature is 20-30°C; the nitrogen purge uses dry nitrogen, and the purge speed is 5-8mL / min.
7. The method for dyeing polyester fabric according to claim 1, characterized in that: The volume proportion of ethanol in the ethanol aqueous solution in step 4 is 30-50%, the concentration of polyester fabric in the ethanol aqueous solution is 100-300 g / L, the ultrasonic frequency of the ultrasonic treatment is 80-120 kHz, and the temperature is 20-30°C.
8. The method for dyeing polyester fabric according to claim 1, characterized in that: The pH in step 4 is adjusted with sodium carbonate, and the ultrasonic frequency of continued ultrasonication is 70-90 kHz and the temperature is 10-20°C; the drying temperature is 70-80°C.
9. The method for dyeing polyester fabric according to claim 1, characterized in that: The mass ratio of the dye solution in step 5 is: 10-12 parts of hydroxylated disperse dye, 0.1-0.4 parts of methyl cellulose, 3-5 parts of sodium carbonate, and 100-110 parts of distilled water.
10. The method for dyeing polyester fabric according to claim 1, characterized in that: The bath ratio of the roughened polyester fabric in the dye solution in step 5 is 1:8-10, the temperature of the constant temperature dyeing is 40-45°C, the stirring speed is 100-400r / min, the heating temperature is 70-80°C; the cooling water washing temperature is 10-30°C; and the drying temperature is 70-80°C.