Retreating-free solid-retreating soft medium-dark color dyeing and finishing process for polyester-cotton fabric

Abstract

The invention discloses a polyester-cotton fabric withdrawal-free solid withdrawal soft medium-dark color dyeing and finishing process, and relates to a dyeing and finishing technology, the technical scheme is characterized in that the process is applied to dyeing and finishing treatment of a medium-dark color of a polyester-cotton blended fabric, and the dyeing and finishing process comprises the following steps: inspecting cloth, inspecting finished cloth subjected to dyeing and finishing treatment, and recording the cloth color condition of the finished cloth; cloth feeding: directly feeding the finished cloth subjected to cloth inspection operation into a machine cylinder, adding 0.7-1.5 g / L of an AD nano auxiliary agent, heating to 55 DEG C, and operating for 10 minutes; performing dyeing, selecting a medium-dark reactive dye, putting the medium-dark reactive dye into a machine cylinder, operating for 10 minutes, circularly adding a sodium salt auxiliary agent, and monitoring the density of Na2SO4; after the steps of color fixation and dyeing, heating to 60 DEG C at the rate of 1 DEG C / min, running for 10 minutes, adding a color fixing agent, keeping the temperature for 40-50 minutes, and sampling. Compared with the traditional color repairing operation on the dyed cloth, the technology disclosed by the invention has the advantages that the operation of removing solid and softening is omitted, efficient dyeing is carried out through a one-bath one-step method, water, electricity and steam are saved, the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to textile dyeing and finishing technology, and more specifically to a desoldering and desoftening-free medium-dark color dyeing and finishing process for polyester-cotton fabrics. Background Art

[0002] Dyeing and finishing refers to the process of chemical treatment of textile materials (fibers, yarns and fabrics), which is also commonly known as printing and dyeing in modern times. Dyeing and finishing, together with spinning, weaving or knitting production, form the whole process of textile production. Dyeing and finishing includes pretreatment, dyeing, printing and finishing. The quality of dyeing and finishing has an important impact on the use value of textiles.

[0003] A Chinese patent with publication number CN117248381A discloses a dark dyeing and finishing process for polyester-viscose fabrics, the main technical points of which are: cloth distribution - loose refining and desizing - pre-setting - singeing - dyeing and dispersion - alkaline reduction washing - neutralization and acid reduction washing - dyeing activation - soap washing - neutralization - dehydration and opening - finished product setting - pre-shrinking.

[0004] For example, with the above-mentioned technical means, people wash, dye and functionally finish textile fabrics to obtain cloth for processing such as clothing and curtains. However, in the dyeing and finishing stage, the finished cloth often needs to be repaired and dyed, repaired and changed in color, or dyed again due to color problems. The finished cloth has been treated with various textile auxiliaries such as fixing agents, softening oils, silicone oils, resins, and waterproofing agents. If the finished cloth is to be repaired and dyed, repaired and changed in color, or dyed again, the cloth needs to be stripped of color and desiliconized, and defixed and softened in the traditional way. However, in the traditional defixing and softening process, it is easy to cause color spots, silicone spots and reduced cloth strength on the finished cloth. Summary of the invention

[0005] In view of the shortcomings of the prior art, the object of the present invention is to provide a desoldering and desoftening-free medium-dark dyeing and finishing process for polyester-cotton fabrics.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a polyester-cotton fabric free desoldering and desoftening medium-dark dyeing and finishing process, which is applied to the dark-dark dyeing and finishing of polyester-cotton blended fabrics, and the dyeing and finishing steps include: Cloth inspection: inspect the finished fabric after dyeing and finishing and record the color of the finished fabric; Put the finished cloth after the cloth inspection operation directly into the machine cylinder, add 0.7-1.5g / L of AD nano additives, then heat it to 55℃ and run it for 10 minutes; For dyeing, choose medium to dark reactive dyes and put them into the machine tank. Run for 10 minutes, add sodium salt additives in a cycle, and monitor the density of Na2SO4. Fixation: After the dyeing step, heat to 60°C at a rate of 1°C / min, add the fixing agent after running for 10 minutes, and take samples after keeping warm for 40-50 minutes; Washing; Wash with acid soap.

[0007] By adopting the above technical scheme, the technology of the present application aims to repair and dye, repair and change the color, and change the dyeing operation of the finished cloth after dyeing and fixing when there are color problems in the dyeing and finishing of polyester-cotton blended fabrics. Before the finished cloth is fed into the machine cylinder, the color condition of the finished cloth is recorded for comparison with the repair situation. Compared with the traditional color repair steps for dyed finished cloth, the technical means adopts AD nano-auxiliary agent as a color repair agent to finish the dyed finished cloth in one step, and then runs at 55°C for 10 minutes, so that the finished cloth can be fully soaked with the aqueous solution. Then, when dyeing, a medium-dark dye is selected to fully contact the dyed finished cloth, and a sodium salt auxiliary agent is added cyclically. The hydrophilicity of the dye is increased by the sodium salt auxiliary agent, and the water film composed of water molecules on the fiber surface is destroyed by the sodium salt, so that the dye is easily adsorbed on the fiber surface, thereby improving the dyeing effect, and the sodium salt auxiliary agent can target the cotton fiber part in the polyester-cotton blended fabric. The problem of low hydrophilicity can be solved by improving the hydrophilicity so that the dye can fully penetrate the fiber, thereby improving the uniformity of dyeing, eliminating uneven dyeing and the difference in cylinders when dyeing in several machine cylinders, and by circulating addition, the amount of sodium salt additive can be gradually and appropriately adjusted, and the actual amount can be adjusted according to the dyeing situation of the cloth, so as to avoid the problem of excessive sodium salt additives affecting the dyeing effect and causing environmental pollution, and also avoid the problem of insufficient amount affecting the color fastness of dyeing and finishing. In addition, the sodium salt additive in liquid state can save the steps of dissolving and mixing, and can efficiently realize the adjustment of dyeing, and then measure the density of Na2SO4, so as to ensure that the polyester-cotton dyed cloth can be better re-dyed; and then carry out low-temperature fixing. Compared with the traditional color repair operation of dyed cloth, this technology saves the operation of defixing and softening, and carries out efficient dyeing through one-bath and one-step method, saving water, electricity and steam, reducing production costs and improving production efficiency.

[0008] The present invention is further configured as follows: in the cloth feeding step, when the finished cloth is dyed with a sensitive color according to dyeing and finishing requirements, a dispersing chelating leveling agent is added after the finished cloth is put into the machine cylinder.

[0009] By adopting the above technical solution, if the dyed color is a sensitive color, by adding a dispersing chelating leveling agent, the dye sensitivity is reduced, the problem of color fringing during the dyeing process is avoided, and the stability of color fastness is improved.

[0010] The present invention is further configured as follows: the sensitive color includes any one of emerald blue, emerald green, bright red, colorful blue, lake blue, green, brilliant blue, light yellow, beige, orange, brilliant red, brilliant royal blue, emerald blue, coffee color, gray, light blue, military green, grass green, dark green, and brown.

[0011] The present invention is further configured as follows: the specific steps of the dyeing operation include: selecting a medium-dark reactive dye with a vinyl sulfone structure and putting it into a machine cylinder, and running it for 10 minutes; Sodium salt additive was added cyclically, NaCl solution was selected as the sodium salt additive, and the density of Na2SO4 was monitored and controlled at 50g / L.

[0012] By adopting the above technical scheme, NaCl solution is used as a sodium salt auxiliary agent, which helps to quickly mix with the dye in the form of a solution. The NaCl solution can quickly replenish sodium ions and stabilize the ion situation in the dye solution. On this basis, controlling the Na2SO4 density can ensure the dyeing-promoting effect of the dye and improve the leveling effect and color fastness of the secondary dyeing.

[0013] The present invention is further configured as follows: in the color fixing operation step, a substitute alkali is selected as a color fixing agent, and its usage is 1-3 g / L; when the color of the dye is black, caustic soda is selected as the color fixing agent.

[0014] By adopting the above technical solution, alternative alkali is selected as the color fixing agent to replace caustic soda and soda ash in the traditional industry, which can save the material cost of enterprises in auxiliary agents by about 50%. In addition, the use of alternative alkali as a color fixing agent has a high solubility, is suitable for low-temperature dyeing operations, has a leveling effect on cotton dyeing, can effectively prevent the generation of color flowers, and has strong dispersibility and penetration. On the basis of ensuring that textiles and fiber dyeing and finishing have bright colors, it reduces the impact on fiber strength.

[0015] The present invention is further configured as follows: the specific steps of the peracid soaping are: after the water washing operation is completed, water is re-introduced into the machine cylinder, and HAC is simultaneously added at a dosage of 1g / L, the water temperature is set at 50°C, the machine cylinder is operated for 10 minutes and then drained, and then water is re-introduced and the temperature is increased to 97°C at a heating rate of 2.5°C / min, and the machine cylinder is operated for 20 minutes for soaping, and the water is drained after the soaping is completed.

[0016] The present invention is further configured as follows: after completing the superacid soap washing operation, washing is performed after the solution in the machine tank is drained: after refilling with water, the temperature is raised to 90 degrees Celsius at 2.5°C / min, after running for 20 minutes, the temperature is lowered to room temperature at 2°C / min, the water is drained, and finally supersoftening is performed.

[0017] By adopting the above technical scheme, adding HAC solution to the grey cloth for acid treatment, it can form a stable complex or chelate with the metal ions in the water through its good complexing and chelating ability, thereby reducing the concentration of these metal ions in the water and reducing the formation of scale. Soap washing at a temperature of 97°C can increase the washing effect, and under high temperature conditions, it can promote the movement speed of dirt molecules, weaken the adhesion between dirt molecules and fabric molecules, and make it easier to remove the floating color residue on the fabric surface.

[0018] The present invention is further configured as follows: the AD nano-additive comprises an anionic dispersant, a nonionic penetrating emulsifier, 13% of alkyl polyoxypropylene ether methyl ammonium halide, and 65% of deionized water.

[0019] The present invention is further configured as follows: the anionic dispersant includes one or two of methylene bis-naphthalene sodium sulfonate, methylene bis-benzyl naphthalene sodium sulfonate and methylene bis-methyl naphthalene sodium sulfonate, and the non-ionic penetrating emulsifier uses Α-isodecyl-Ω-hydroxy-poly(oxy-1,2-ethylene), and the weight ratio thereof is: Anionic dispersant 15-20%; α-isodecyl-Ω-hydroxy-poly(oxy-1,2-ethylene) 2%.

[0020] In summary, the present invention has the following beneficial effects: The technology of the present application aims to repair, repair and change the color of the finished fabric after dyeing and fixing when there are color problems in the dyeing and finishing of polyester-cotton blended fabrics. Before the finished fabric is fed into the machine cylinder, the color condition of the finished fabric is recorded for comparison with the repair situation. Compared with the traditional color repair steps for dyed finished fabrics, the technical means adopts AD nano-auxiliary agent as a color repair agent to finish the dyed finished fabric in one step, and then runs at 55°C for 10 minutes, so that the finished fabric can be fully soaked with the aqueous solution. Then, when dyeing, a medium-dark dye is selected to fully contact the dyed finished fabric, and a sodium salt auxiliary agent is added cyclically. The hydrophilicity of the dye is increased by the sodium salt auxiliary agent, and the water film composed of water molecules on the fiber surface is destroyed by the sodium salt, so that the dye is easily adsorbed on the fiber surface, thereby improving the dyeing effect. In addition, the sodium salt auxiliary agent can target the low hydrophilicity of the cotton fiber part in the polyester-cotton blended fabric. The problem is solved by improving the hydrophilicity so that the dye can fully penetrate the fiber, thereby improving the uniformity of dyeing, eliminating uneven dyeing and the difference in cylinders when dyeing in several cylinders, and by circulating the addition method, the amount of sodium salt additive can be gradually and appropriately adjusted, and the actual amount can be adjusted according to the dyeing situation of the cloth, so as to avoid the problem of excessive sodium salt additives affecting the dyeing effect and causing environmental pollution, and also avoid the problem of insufficient amount affecting the color fastness of dyeing and finishing. In addition, the sodium salt additive in liquid state can save the steps of dissolving and mixing, and can efficiently realize the adjustment of dyeing, and then measure the density of Na2SO4, so as to ensure that the polyester-cotton dyed cloth can be better re-dyed; and then carry out low-temperature fixing. Compared with the traditional color repair operation of dyed cloth, this technology saves the operation of defixing and softening, and carries out efficient dyeing through a one-bath one-step method, saving water, electricity and steam, reducing production costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the process flow of our company's pre-solidification and softening treatment; Figure 2 It is the process flow chart of this embodiment; Figure 3 This is a comparison chart of the effects after water washing in this application. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Comparative example: Figure 1 As shown, before improving the technology of this application, our company used a high-temperature desolidification, color stripping, and light bleaching and scouring process to repair the finished fabric with poor color. The specific operating steps are: adding a desolidifying agent and a degreasing agent at a low temperature, and then heating to 60°C, adding caustic soda and running for 10 minutes, and then continuing to heat to 78°C at a rate of 3°C / minute, running for 10 minutes, and adding Na2S2O insurance powder to improve the uneven color stripping, and then heating to 110°C, keeping warm for 30-50 minutes, and naturally cooling to 78°C and draining; then, washing twice with a water temperature of 70°C, each time running for 8-10 minutes, to prevent the textile finished fabric from being brittle during the color stripping and desolidification treatment; After completing the washing operation, re-fill with water, add hydrogen peroxide and soda ash at the same time, and heat the solution directly to 95℃, run at 95℃ for 30 minutes, perform light bleaching, and then naturally cool to 78℃ and drain the solution in the tank, re-fill with water, wash once, and then perform scouring. During scouring, add glacial acetic acid and dispersing chelating agent, heat to 90℃, keep warm for 10 minutes, wash once, each time for 8-10 minutes, check the color stripping and desolidification of the finished cloth, and re-dye and finish the finished cloth after passing the inspection.

[0024] like Figure 2 As shown, a polyester-cotton fabric free desoldering and desoftening medium-dark dyeing and finishing process is applied to the dark-colored dyeing and finishing of polyester-cotton blended fabrics, and the dyeing and finishing steps include: Cloth inspection: inspect the finished fabric after dyeing and finishing and record the color of the finished fabric; Put the finished cloth after the cloth inspection operation directly into the machine cylinder, add 0.7-1.5g / L of AD nano additives, then heat it to 55℃ and run it for 10 minutes; For dyeing, choose medium to dark reactive dyes and put them into the machine tank. Run for 10 minutes, add sodium salt additives in a cycle, and monitor the density of Na2SO4. Fixation: After the dyeing step, heat to 60°C at a rate of 1°C / min, add the fixing agent after running for 10 minutes, and take samples after keeping warm for 40-50 minutes; Washing; Wash with acid soap.

[0025] In the cloth feeding step, when the finished cloth is dyed with sensitive colors according to the dyeing and finishing requirements, a dispersing chelating leveling agent is added after one ton of the finished cloth is put into the machine cylinder. In the present embodiment, before the cloth is fed, the finished cloth with color defects such as color difference and color spots is inspected, and the finished cloth with sensitive colors is washed with an enzyme with a wool-eating agent to remove impurities and stains on the surface of the textile. After dehydration, it is fed into the machine cylinder of the dyeing machine, and a dispersing chelating leveling agent is added. AD nano-additive is added into the machine cylinder at a ratio of 0.7-1.5g / L. The fabric is fully penetrated by the dispersing chelating leveling agent to improve the sensitivity of the fabric to the dye, reduce the risk of color spots, and the cotton component in the polyester-cotton fabric is "etched" and "polished" by the wool-eating agent. Improve the performance of cotton fiber, and the ingredients of AD nano additives contain anionic dispersant 15-20%, nonionic penetrating emulsifier 2%, alkyl polyoxypropylene ether methyl ammonium halide 13%, and the rest is deionized water. In this embodiment, the anionic dispersant includes one or two of methylene bis naphthalene sulfonate sodium, methylene bis benzyl naphthalene sulfonate sodium and methylene bis methyl naphthalene sulfonate sodium, and the nonionic penetrating emulsifier adopts Α-isodecyl-Ω-hydroxy-poly (oxy-1,2-ethylene), and the weight ratio is: anionic dispersant 15-20%; Α-isodecyl-Ω-hydroxy-poly (oxy-1,2-ethylene) 2%, wherein, in this embodiment, sodium dinaphthylmethane disulfonate is selected as the anionic dispersant, and its molecular formula is: (C10H8O3S·CH2O)x·xNa, and its pH value is 7-9, and in this embodiment, the sensitive colors include any one of emerald blue, emerald green, bright red, colorful blue, lake blue, green, bright blue, light yellow, beige, orange, bright red, bright royal blue, emerald blue, coffee, gray, light blue, military green, grass green, dark green, and brown.

[0026] The specific steps of dyeing operation include: selecting medium and dark reactive dyes of vinyl sulfone structure and putting them into the machine cylinder, and running for 10 minutes; Sodium salt additive was added cyclically, NaCl solution was selected as the sodium salt additive, and the density of Na2SO4 was monitored and controlled at 50g / L.

[0027] In the color fixing operation step, a substitute alkali is selected as a color fixing agent, and its dosage is 1-3g / L. When the color of the dye is black, caustic soda is selected as a color fixing agent.

[0028] The specific steps of peracid soap washing are as follows: after the water washing operation is completed, water is refilled into the cylinder, and HAC is added simultaneously at a dosage of 1g / L, the water temperature is set at 50°C, the cylinder is run for 10 minutes and then drained, and then water is refilled and the temperature is increased to 97°C at a heating rate of 2.5°C / min, and the cylinder is run for 20 minutes for soap washing, and the cylinder is drained after the soap washing is completed.

[0029] After the acid soap washing operation is completed, the solution in the machine tank is drained and then washing is carried out: after refilling with water, the temperature is raised to 90 degrees Celsius at 2.5℃ / min, and after running for 20 minutes, the temperature is lowered to room temperature at 2℃ / min, and then the water is drained, and finally the softening is carried out.

[0030] Example 1: In this example, a coffee-colored polyester-cotton blended fabric with color spots was re-dyed. The dyed polyester-cotton blended fabric was first put into a machine cylinder, and a wool-eating agent was added for enzyme washing for 5 minutes. Then, 0.7 g / L of the pre-mixed AD nano-auxiliary agent was added without draining. Then, the temperature was raised to 55°C and the machine was run for 10 minutes. Then, a coffee-colored liquid active dye was directly added without dehydration. The amount was 1.5% owf. The machine was run for 10 minutes. At the same time, a NaCl solution was prepared with a concentration of 8 g / L. First, based on 1 liter The unit cycle is added into the cylinder, and the density of Na2SO4 in the cylinder is monitored and controlled at 50g / L. After continuing to run for 20 minutes, soda ash Na2CO3 solution is added. After continuing to run for 5 minutes, the temperature is raised to 60°C at a rate of 1°C / min. After continuing to run for 10 minutes, substitute alkali is added for color fixation. After keeping warm for 40-50 minutes, sampling is carried out to check the re-dyeing of the cloth. After the re-dyeing is qualified, the solution in the cylinder is drained and quantitative water washing is carried out for 3 times, each time for 8 minutes, and then post-processing operations are carried out.

[0031] When acid soaping the dyed cloth after dyeing and finishing, add HCA and clean water into the machine cylinder together. The solubility of HAC solution is 1g / L. The water temperature is controlled to be maintained at 50℃. It is run for 10 minutes, and then the temperature is increased to 97℃ at a heating rate of 2.5℃ / min, and soaping agent is added for soaping. The soaping is run for 20 minutes, and then the solution in the machine cylinder is drained after naturally cooling to room temperature. After washing with clean water once, the scouring operation is carried out. Specifically, water is added again after washing, and the temperature is increased to 90℃ at a heating rate of 2.5℃ / min. After running for 20 minutes, the temperature is cooled to room temperature at 2℃ / min and the water in the machine cylinder is drained. Finally, quantitative water washing is run for 8 minutes. After 2 cycles of washing, it is re-softened at 40℃ and runs for 20 minutes.

[0032] Example 2. In this example, a dark green dyed polyester-cotton blended fabric with color spots was re-dyed. The dyed polyester-cotton blended fabric was first put into a machine cylinder, and a wool feeder was added for enzyme washing for 5 minutes. Then, 1 g / L of the pre-mixed AD nano-auxiliary agent was added without draining. Then, the temperature was raised to 55°C and the machine was run for 10 minutes. Then, a dark green liquid active dye was directly added without dehydration. The amount was 1.4% owf. The machine was run for 10 minutes. At the same time, a NaCl solution was prepared with a concentration of 8 g / L. First, a single 1 liter of the machine was used. The density of Na2SO4 in the cylinder is monitored and controlled at 50g / L. After continuing to run for 20 minutes, add soda ash Na2CO3 solution. After continuing to run for 5 minutes, heat the temperature to 60℃ at a rate of 1℃ / min. After continuing to run for 10 minutes, add substitute alkali for color fixation. After keeping warm for 40-50 minutes, take samples to check the re-dyeing of the cloth. After the re-dyeing is qualified, drain the solution in the cylinder and wash it with water for 3 times with a certain amount of water, each time for 8 minutes, and then carry out post-processing operations.

[0033] When acid soaping the dyed cloth after dyeing and finishing, add HCA and clean water into the machine cylinder together. The solubility of HAC solution is 1g / L. The water temperature is controlled to be maintained at 50℃. It is run for 10 minutes, and then the temperature is increased to 97℃ at a heating rate of 2.5℃ / min, and soaping agent is added for soaping. The soaping is run for 20 minutes, and then the solution in the machine cylinder is drained after naturally cooling to room temperature. After washing with clean water once, the scouring operation is carried out. Specifically, water is added again after washing, and the temperature is increased to 90℃ at a heating rate of 2.5℃ / min. After running for 20 minutes, the temperature is cooled to room temperature at 2℃ / min and the water in the machine cylinder is drained. Finally, quantitative water washing is run for 8 minutes. After 2 cycles of washing, it is re-softened at 40℃ and runs for 20 minutes.

[0034] Example 3. In this example, a gray dyed polyester-cotton blended fabric with color spots is re-dyed. The dyed polyester-cotton blended fabric is first put into a machine cylinder, and a wool feeder is added for enzyme washing for 5 minutes. Then, 1.5 g / L of the pre-mixed AD nano-auxiliary agent is added without draining. Then, the temperature is raised to 55°C and the machine is operated for 10 minutes. Then, a gray liquid reactive dye is directly added without dehydration. The amount is 1.5% owf. The machine is operated for 10 minutes. At the same time, a NaCl solution is prepared with a concentration of 8 g / L. First, a single 1 liter of the machine is used. The density of Na2SO4 in the cylinder is monitored and controlled at 50g / L. After continuing to run for 20 minutes, add soda ash Na2CO3 solution. After continuing to run for 5 minutes, heat the temperature to 60℃ at a rate of 1℃ / min. After continuing to run for 10 minutes, add substitute alkali for color fixation. After keeping warm for 40-50 minutes, take samples to check the re-dyeing of the cloth. After the re-dyeing is qualified, drain the solution in the cylinder and wash it with water for 3 times with a certain amount of water, each time for 8 minutes, and then carry out post-processing operations.

[0035] When acid soaping the dyed cloth after dyeing and finishing, add HCA and clean water into the machine cylinder together. The solubility of HAC solution is 1g / L. The water temperature is controlled to be maintained at 50℃. It is run for 10 minutes, and then the temperature is increased to 97℃ at a heating rate of 2.5℃ / min, and soaping agent is added for soaping. The soaping is run for 20 minutes, and then the solution in the machine cylinder is drained after naturally cooling to room temperature. After washing with clean water once, the scouring operation is carried out. Specifically, water is added again after washing, and the temperature is increased to 90℃ at a heating rate of 2.5℃ / min. After running for 20 minutes, the temperature is cooled to room temperature at 2℃ / min and the water in the machine cylinder is drained. Finally, quantitative water washing is run for 8 minutes. After 2 cycles of washing, it is re-softened at 40℃ and runs for 20 minutes.

[0036] Example 4 is different from Example 1, Example 2 and Example 3 in that the dyes used in Example 1, Example 2 and Example 3 are EDN type supramolecular active dyes containing vinyl sulfone active groups and trichloropyrimidine active groups, and the SERF values ​​of the three primary colors are: Example 4 A conventional medium-temperature reactive dye of the same color system as that of Examples 1, 2 and 3 was selected, and the dyeing test of Examples 1, 2 and 3 was repeated. After washing 20 times in accordance with the standard "GB / T 3921-2008" textile color fastness test and soap fastness, samples were taken to compare the color difference between the original color and the washed color. Figure 3 .

[0037] The difference between the S values ​​of the mixed three primary colors of the supramolecular active dyes used in the present application is small, so that the supramolecular active dyes have a good synchronization rate of the three primary colors during dyeing and finishing, and then in the dyeing and finishing process, in conjunction with the free desolventizing and desoftening process, when directly re-dyeing is carried out, it has consistency, and the hue of the supramolecular active dye is less affected by the changes in sodium sulfoxide, soda ash and temperature, thereby eliminating the influence of external factors on the dyeing and finishing hue, and improving the yield rate of suppressing color flowers.

[0038] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A process for dyeing and finishing polyester-cotton fabrics in medium and dark colors without desoldering and softening, characterized in that: Applied to the dyeing and finishing of dark colors in polyester-cotton blended fabrics. The dyeing and finishing steps include: Cloth inspection: inspect the finished fabric after dyeing and finishing and record the color of the finished fabric; Put the finished cloth after the cloth inspection operation directly into the machine cylinder, add 0.7-1.5g / L of AD nano additives, then heat it to 55℃ and run it for 10 minutes; For dyeing, choose medium to dark reactive dyes and put them into the machine tank. Run for 10 minutes, add sodium salt additives in a cycle, and monitor the density of Na2SO4. Fixation: After the dyeing step, heat to 60°C at a rate of 1°C / min, add the fixing agent after running for 10 minutes, and take samples after keeping warm for 40-50 minutes; Washing; Wash with acid soap.

2. The process for dyeing and finishing polyester-cotton fabrics in medium and dark colors without desoldering and softening according to claim 1, characterized in that: In the cloth feeding step, when the finished cloth is dyed with sensitive colors according to the dyeing and finishing requirements, the finished cloth is put into the machine cylinder and then a dispersing chelating leveling agent is added.

3. The process for dyeing and finishing polyester-cotton fabrics in medium and dark colors without desoldering and softening according to claim 2, characterized in that: The sensitive colors include any one of emerald blue, emerald green, bright red, colorful blue, lake blue, green, brilliant blue, light yellow, beige, orange, brilliant red, brilliant royal blue, emerald blue, coffee color, gray, light blue, military green, grass green, dark green, and brown.

4. The process for dyeing and finishing polyester-cotton fabrics in medium and dark colors without desoldering and softening according to claim 1, characterized in that: The specific steps of dyeing operation include: selecting medium and dark reactive dyes of vinyl sulfone structure and putting them into the machine cylinder, and running for 10 minutes; Sodium salt additive was added cyclically, NaCl solution was selected as the sodium salt additive, and the density of Na2SO4 was monitored and controlled at 50g / L.

5. The process for dyeing and finishing polyester-cotton fabrics in medium and dark colors without desoldering and softening according to claim 1, characterized in that: In the color fixing operation step, a substitute alkali is selected as a color fixing agent, and its dosage is 1-3g / L. When the color of the dye is black, caustic soda is selected as a color fixing agent.

6. The process for dyeing and finishing polyester-cotton fabrics in medium and dark colors without desoldering and softening according to claim 1, characterized in that: The specific steps of the peracid soap washing are: after the water washing operation is completed, water is re-filled into the machine cylinder, and HAC is simultaneously added at a dosage of 1g / L, the water temperature is set at 50°C, the machine cylinder is operated for 10 minutes and then drained, and then water is re-filled and the temperature is increased to 97°C at a heating rate of 2.5°C / min, and the machine cylinder is operated for 20 minutes for soap washing, and the water is drained after the soap washing is completed.

7. The process for dyeing and finishing polyester-cotton fabrics in medium and dark colors without desoldering and softening according to claim 1, characterized in that: After the acid soaping operation is completed, the solution in the machine tank is drained and then washed: after refilling with water, the temperature is raised to 90 degrees Celsius at 2.5°C / min, and after running for 20 minutes, the temperature is lowered to room temperature at 2°C / min, and then the water is drained, and finally the machine is softened.

8. The process for dyeing and finishing polyester-cotton fabrics in medium and dark colors without desoldering and softening according to claim 1, characterized in that: The AD nano-additive comprises an anionic dispersant, a nonionic penetrating emulsifier, 13% of alkyl polyoxypropylene ether methyl ammonium halide and 65% of deionized water.

9. The process for dyeing and finishing polyester-cotton fabrics in medium and dark colors without desoldering and softening according to claim 8, characterized in that: The anionic dispersant includes one or two of methylene bis-naphthalene sodium sulfonate, methylene bis-benzyl-naphthalene sodium sulfonate and methylene bis-methyl-naphthalene sodium sulfonate. The nonionic penetrating emulsifier uses Α-isodecyl-Ω-hydroxy-poly(oxy-1,2-ethylene), and the weight ratio is: Anionic dispersant 15-20%; α-isodecyl-Ω-hydroxy-poly(oxy-1,2-ethylene) 2%.

Images