Sunflower pattern dyeing method for garment tie-dyeing

Abstract

The present application relates to a sunflower pattern dyeing method for garment tie-dyeing, comprising the following steps: placing a garment in a dyeing vat for heating and dyeing; then carrying out cooling, water washing and dehydration until the liquid retention rate reaches about 80%±5%; spreading the garment, using an arc-shaped steel wire to press out natural radians, and then using high-temperature nylon cable ties to tie and fix at preset positions, so as to prevent a dye solution from penetrating; putting the garment with the tied pattern into the vat for dyeing again; and after completion, releasing the cable ties, feeding the garment into a soaping solution for soaping, then soaking same in a softener, and performing drying treatment. The sunflower pattern dyeing method for garment tie-dyeing of the present application has the advantage of solving the problem of unstable pattern and color control in the garment tie-dyeing process.

Description

Sunflower pattern dyeing method for ready-made clothing tie-dyeing TECHNICAL FIELD

[0001] The present application relates to the field of garment dyeing, more specifically, it relates to a sunflower pattern dyeing method for ready-made clothing tie-dyeing. BACKGROUND

[0002] In today's rapidly changing era, consumers' demand for clothing has gradually shifted from traditional functionality and durability to the pursuit of individualization, uniqueness and artistry. The rise of this trend not only drives innovation in the field of clothing design, but also brings unprecedented development opportunities for traditional crafts such as tie-dyeing technology.

[0003] Tie-dyeing process involves manually binding, folding, twisting and other processing of fabric, and then immersing it in dye. Since the local fabric is tightly bound, the dye cannot penetrate uniformly, resulting in natural, random and richly layered patterns on the fabric. These patterns are both regular and full of changes, and each work is unique, perfectly meeting the pursuit of individualization and uniqueness by modern consumers. At the same time, tie-dyeing has soft colors and natural transitions, adding a warm, retro charm to clothing, which is deeply welcomed by the market.

[0004] Although the tie-dyeing process has great potential in individualized clothing design, its industrialization process faces many problems. Traditional tie-dyeing process highly depends on manual operation, from designing patterns, binding fabric to dyeing, untying, washing, each step requires delicate manual operation, which is time-consuming and inefficient, making it difficult to meet the needs of mass production. In addition, the concentration of dye, temperature, soaking time, and fabric material and binding method during tie-dyeing process all affect the final color effect and pattern shape, making it difficult to control color and pattern, and it is difficult to achieve standardization and consistency of batch production. SUMMARY

[0005] The following is a summary of the subject matter described in detail in this document. This summary is not intended to limit the scope of protection of the claims.

[0006] In order to solve the problem of unstable pattern and color control in ready-made clothing tie-dyeing process, the present application provides a sunflower pattern dyeing method for ready-made clothing tie-dyeing.

[0007] The sunflower pattern dyeing method for ready-made clothing tie-dyeing provided by the present application adopts the following technical solution:

[0008] A sunflower pattern dyeing method for ready-made clothing tie-dyeing, comprising the following steps:

[0009] Prepare the dyeing bath with bath ratio 1:(11-13), dye concentration 0.5-1.5%, add leveling agent 0.5-1.5g / L, chelating agent 0.1-1g / L, add acetic acid to adjust the pH value of the dyeing solution to 5.5-6.5;

[0010] Put the clothes into the dyeing bath, heat to 90-97℃, keep for 20-40min for dyeing, take out the clothes after dyeing, cool the clothes to 35-45℃, wash for 5-15min to remove the floating color, and then dehydrate the dyed clothes for 60-80s, control the wet pick-up rate at 80%±5%;

[0011] Lay the dehydrated clothes flat, press the arc-shaped strips on the surface of the clothes according to the size of the clothes, push the clothes from one end of the arc-shaped strip to the other end along the arc direction, and form folds with equal height, then fasten the clothes at equal distances with multiple ties;

[0012] Put the clothes with the pattern tied into the dyeing bath, rotate the dyeing drum at a speed of 20-40r / min, after dyeing, untie the nylon ties, shake the clothes, and then put the clothes into the soaping solution, heat to 75-85℃, keep for 15-30min, then cool to 45-55℃, keep for 5-15min;

[0013] Put the clothes into the softener, keep at 35-45℃, soak for 15-30min, take out the treated clothes, and then dry until completely dry.

[0014] By adopting the above technical scheme, in the dyeing stage, the temperature rising speed, dyeing temperature and time are strictly controlled to ensure that the dye can fully penetrate into the fibers of the clothes, while avoiding the decomposition or color change of the dye caused by overheating, thereby ensuring the stability and consistency of the dyeing effect. Using the arc-shaped strip as an auxiliary tool can ensure that the clothes form uniform and sunflower pattern designed folds during the pushing process. The shape and size of the arc-shaped strip are adjusted according to the size of the clothes and the required pattern, thereby ensuring the accuracy and consistency of the folds. Pushing from one end of the arc-shaped strip along the circular arc direction from bottom to top makes the formation of folds more natural and highly equal. By fastening multiple straps at equal distances, not only the shape and position of the folds are fixed, but also the stability of the pattern is enhanced. In the subsequent dyeing process, these fastened folds can resist the flow and penetration of the dyeing liquid, making the final pattern clearer and more stable, and the dyeing liquid can penetrate more uniformly into the fibers of the clothes, especially in the concave and convex parts of the folds, thereby improving the uniformity and depth of dyeing. At the same time, due to the presence of folds, the flow and distribution of dyeing liquid on the surface of the clothes also become more complex and interesting, adding more levels and three-dimensionality to the sunflower pattern, reducing defects such as bleeding and shading that occur during the dyeing process. After dyeing, through soaping and softener treatment, the floating color and impurities on the surface of the clothes are further removed, improving the softness and wearing comfort of the clothes. At the same time, these post-processing steps also help to consolidate the dyeing effect, making the color more lasting and bright. The entire dyeing process strictly controls the parameters and conditions of each step, from dye preparation to post-processing, each step strives for precision and efficiency, thereby greatly improving the sunflower pattern dyeing quality of the finished clothes. The finished product not only has bright colors and clear patterns, but also has soft hand feeling and comfortable wearing.

[0015] In one embodiment, the leveling agent comprises 20-30% plant extract, 5-10% nano-silica, 40-60% polyethylene glycol, and 15-25% surfactant by mass percentage.

[0016] By adopting the above technical scheme, the plant extract as a natural ingredient has good dispersibility and permeability, can help the dye to be more evenly distributed in the fibers of the clothes, and reduce the color spot and color flower phenomenon. At the same time, the small particle structure of nano-silicon dioxide further enhances the dispersion effect of the dye, so that the dyeing is more uniform and delicate. Polyethylene glycol (PEG) as a commonly used non-ionic surfactant has good wetting and film-forming properties. During the dyeing process, PEG can wrap the dye molecules to form a thin film, which helps the dye to better adhere to the fibers of the clothes and improves the dyeing fastness and color brightness. The surfactants play a key role in the leveling agent, which can reduce the interfacial tension between the dyeing liquid and the fibers of the clothes, and promote the penetration of the dye molecules into the fibers. This not only improves the dyeing efficiency, but also makes the dyeing more thorough and the color more saturated. The use of plant extracts makes the leveling agent more environmentally friendly, reduces the use of chemical synthetics, and meets the modern textile industry's requirements for green and sustainable development. At the same time, nano-silicon dioxide as an inorganic nanomaterial also has high biological safety and environmental friendliness.

[0017] In one embodiment, the plant extract includes 30-50 parts by weight of madder extract, 40-80 parts by weight of tea tree essential oil, and 20-30 parts by weight of sodium alginate.

[0018] By adopting the above technical scheme, the active ingredients in madder can be firmly combined with the fibers of the clothes, improving the fastness and color stability of the dyeing. Madder extract is a natural source, which is more environmentally friendly than chemical dyes. Tea tree essential oil has strong antibacterial properties and can effectively inhibit the growth of bacteria, mold and other microorganisms. Tea tree essential oil can also improve the hand feeling of clothes, making them softer and more comfortable. At the same time, it can also promote the penetration and uniform distribution of the dye in the fibers, improving the dyeing quality. Sodium alginate, as an ideal paste for reactive dye printing, plays an important role in the dyeing process. The negative charge in its molecular structure helps to promote dyeing and prevent dye from combining with the paste, thereby improving the uniformity and clarity of the dyeing. Sodium alginate also has good film-forming properties, which can form a protective film on the surface of the fibers of the clothes, enhancing the adhesion between the dye and the fibers, making the dyeing more firm and durable.

[0019] In one embodiment, the preparation method of the madder extract is as follows:

[0020] Add madder root powder into the reaction container, and add an ethanol solution with a mass concentration of 65% to 95%, the mass addition ratio of madder root powder to ethanol solution being 1:(1-3), vacuumize the reaction container to 0.7-1.1 bar, and supplement nitrogen to maintain stable pressure;

[0021] The stirring device with mechanical rotation speed of 3000-5000 r / min is used to stir the reaction container, the stirring time is 5-8 min, and the stirring is repeated for 3-5 times. After the stirring is completed, the filter screen is used to filter the extractive to obtain the madder extractive;

[0022] The active carbon with mass of 10-50% of the extractive is added into the madder extractive, and after being uniformly stirred, it is placed for 4-8 h, and then the active carbon and solid impurities are removed by filtration to obtain the decolorized madder extractive;

[0023] The decolorized madder extractive is concentrated by rotary evaporation, the vacuum degree is set to 100-200 mbar, the water bath temperature is set to 50-60 °C, and the concentration is continued for 3-5 h to obtain the concentrated madder extractive;

[0024] The concentrated madder extractive is centrifuged at 1500-4000 r / min for 3-10 min, and the supernatant is reserved to obtain the madder extractive.

[0025] By using the above technical scheme, the 65% to 95% ethanol solution is used as the extractant, and the mass addition ratio of the madder root powder and the ethanol solution is controlled to be 1:(1-3), which is beneficial to the sufficient dissolution of the effective components in the madder and improves the extraction efficiency. The reaction container is vacuumized to 0.7-1.1 bar, and nitrogen is supplemented to maintain the pressure stable, which can effectively prevent the ethanol from volatilizing and the oxidation reaction from occurring, and protect the active components in the madder from being damaged. The stirring device with mechanical rotation speed of 3000-5000 r / min is used to stir the reaction container, which ensures that the madder root powder and the ethanol solution are in sufficient contact and improves the extraction effect. By repeating the stirring for 3-5 times, the thoroughness of the extraction can be further increased. The active carbon with mass of 10-50% of the extractive is added into the madder extractive, and by the adsorption of the active carbon, the pigments and impurities in the extractive are removed, so that the extractive is more clear and transparent. This step is of great significance for the purification and application of the subsequent extractive. The decolorized madder extractive is concentrated by rotary evaporation, the ethanol solvent is continuously evaporated by setting the vacuum degree and the water bath temperature, and the concentrated madder extractive is obtained, which effectively improves the concentration of the extractive. The madder extractive obtained by the above preparation method has high purity and stability, and can fully retain the effective components and active substances in the madder.

[0026] In one embodiment, the chelating agent is selected from tartaric acid and sodium hexametaphosphate configured in a mass ratio of 1:(1-1.5).

[0027] By adopting the above technical solution, tartaric acid, as a polycarboxylic acid, has the ability to form stable complexes with metal ions. Before dyeing, tartaric acid can complex with metal ions such as calcium and magnesium in water to form insoluble precipitates, effectively removing these metal ions. This not only reduces the impact of metal ions on dyes, but also improves the dye fixation rate and dyeing effect. Sodium hexametaphosphate also has the ability to complex with metal ions, especially in hard water conditions, it can form soluble complexes with calcium, magnesium ions and other metal ions, "locking" the metal ions to achieve the purpose of soft water. This complexation helps to reduce the risk of metal ions combining with dyes to form insoluble precipitates during dyeing, improving the uniformity and stability of dyeing. Through the synergistic effect of tartaric acid and sodium hexametaphosphate, the impact of metal ions on dyes can be effectively prevented, maintaining the color stability of dyes. This helps to reduce color differences, color spots and other problems that may occur during dyeing, improving the quality of finished dyeing products.

[0028] In one embodiment, the soaping bath ratio is 1:10, and the soaping agent selected is RC-425 soaping agent with a concentration of 1.3-1.7g / L.

[0029] By adopting the above technical solution, RC-425 soaping agent exhibits excellent stain removal ability within this concentration range. It can effectively remove unfastened dyes, hydrolyzed dyes, oils and other impurities on the surface and inside of the fabric, ensuring the cleanliness and brightness of the finished dyeing product. The soaping agent can remove stains while also providing some protection to the fabric fibers. It can prevent the fibers from being damaged during washing, maintaining the softness and comfort of the fabric. As an environmentally friendly product, the low concentration use of RC-425 soaping agent helps to reduce pollutant emissions in wastewater. At the same time, the product has good biodegradability and will not cause long-term pollution to the environment.

[0030] In one embodiment, the softener bath ratio is 1:10, and the softener concentration is 2g / L.

[0031] In one embodiment, the softener selected is a modified silicone softener.

[0032] By adopting the above technical solution, a bath ratio of 1:10 ensures that the softener can fully and uniformly penetrate into the fabric fibers, avoiding uneven distribution of the softener due to excessively high or low bath ratios. This uniform treatment helps to improve the overall softness and hand consistency of the fabric. The modified silicone softener can firmly adhere to the surface of the fibers, forming a lubricating film that reduces the coefficient of friction between fibers, improving the softness and smoothness of the fabric. Compared to traditional softeners, the modified silicone softener has the advantages of not yellowing the fabric, not changing the color of the dye, good softness, and water and wrinkle resistance.

[0033] In summary, the present application has the following beneficial effects:

[0034] 1. Due to the precise control of dye liquor preparation, dyeing temperature and time, innovative tie-dyeing process and meticulous post-treatment steps, the present application realizes high-quality dyeing of clothing tie-dyed sunflower patterns. From the dyeing stage to ensure sufficient dye penetration, to the innovative tie-dyeing method using arc-shaped steel wire and nylon tie to create a natural and smooth flower pattern, to the soaping and softener treatment to improve the quality of the clothes, each step is carefully designed and optimized, and finally a tie-dyed product with bright colors, clear patterns and soft hand feeling is presented, significantly improving the artistic beauty and wearing comfort of the product.

[0035] 2. In the present application, the leveling agent preferably uses plant extracts to provide natural dispersion and penetration, nano-silicon dioxide to enhance the dispersion effect of dyes, polyethylene glycol to improve dye adhesion and color brightness, and surfactants to promote dye penetration and improve dyeing efficiency, realizing environmentally friendly and efficient dyeing uniformity, while meeting the pursuit of green and sustainable development of modern textile industry.

[0036] 3. In the present application, plant extracts are preferably used, including madder extract, tea tree essential oil and sodium alginate. Madder extract not only enhances dyeing fastness and color stability, but also has environmental advantages; tea tree essential oil imparts antibacterial and soft properties to the clothes, and helps dyes to penetrate uniformly; sodium alginate improves dyeing uniformity and clarity through its unique molecular structure, and enhances dye adhesion.

[0037] Other aspects can be appreciated upon reading and understanding the detailed description. DETAILED DESCRIPTION

[0038] The present application is further described in detail below in conjunction with the examples, and it is particularly noted that: in the following examples, the specific conditions are not specified, and the conventional conditions or the conditions recommended by the manufacturer are used, and in the following examples, the raw materials used can be obtained from ordinary market sources unless otherwise specified.

[0039] Preparation example of madder extract

[0040] Preparation example 1

[0041] The preparation method of madder extract is as follows:

[0042] Fresh, disease-free and completely dried madder roots are selected as raw materials, and the madder roots are washed, dried and then ground into fine powder using a mechanical grinding machine.

[0043] 10 kg of madder root powder is added to the reaction container of the flash extractor, and 20 kg of 80% ethanol solution is added.

[0044] The reaction vessel was evacuated to 0.9 bar and nitrogen was added to maintain a constant pressure.

[0045] The ultrasonic-assisted flash extraction system was started, and the mechanical rotation speed was set to 4000 r / min. The extraction was repeated 4 times, and each extraction lasted for 6 min.

[0046] After the extraction was completed, the extract was filtered using filter paper to remove the madder root residue, and a clear madder extract was obtained.

[0047] The activated carbon decolorization method was used, and 30% of the mass of the extract was added to the extract. After stirring uniformly, the mixture was allowed to stand for 6 h, and then the activated carbon and impurities were removed by filtration to obtain the decolorized madder extract.

[0048] The decolorized madder extract was concentrated by rotary evaporation, with a vacuum degree of 100 mbar and a water bath temperature of 55°C, to remove most of the ethanol solvent and obtain a concentrated madder extract.

[0049] The concentrated madder extract was centrifuged at 2500 r / min for 5 min to remove precipitates and impurities, and the supernatant was collected. The supernatant was sealed and filled into a clean container to obtain the final madder extract.

[0050] Preparation example of a leveling agent

[0051] Preparation example 2

[0052] Preparation of a leveling agent

[0053] Madder extract 4 kg, tea tree oil (type 008 from Nongkehua) 6 kg, and sodium alginate (effective ingredient content 99%, execution standard CP2020) 2.5 kg were mixed in a reaction vessel. The madder extract was prepared according to preparation example 1, and the mixture was uniformly stirred by mechanical stirring to obtain a plant extract.

[0054] The plant extract 2.5 kg, nano-silicon dioxide with a purity of >99% 0.5 kg, polyethylene glycol-400 5 kg, and sodium dodecylbenzenesulfonate (type BW2559, purity ≥95%) 2 kg were heated to 60°C in a reaction vessel and uniformly mixed by mechanical stirring to obtain a leveling agent.

[0055] Preparation example 3

[0056] Preparation of a leveling agent, which is different from preparation example 2 in that tea tree oil 4 kg and sodium alginate 2 kg were mixed in a reaction vessel, and the mixture was uniformly stirred by mechanical stirring to obtain a plant extract.

[0057] Preparation example 4

[0058] Preparation of a levelling agent, different from that of Preparation Example 2 in that 5 kg of madder extract and 8 kg of tea tree oil were mixed in a reaction vessel, the madder extract being prepared according to Preparation Example 1, and the mixture was homogenized by mechanical stirring to obtain a plant extract;

[0059] Preparation Example 5

[0060] Preparation of a levelling agent, different from that of Preparation Example 2 in that no plant extract was added to the levelling agent.

[0061] Preparation Example 6

[0062] Preparation of a levelling agent, different from that of Preparation Example 2 in that no nano-silica was added to the levelling agent.

[0063] Example

[0064] Example 1

[0065] A sunflower pattern dyeing method for garment tie-dyeing:

[0066] A dye vat was prepared according to a bath ratio of 1:12, wherein the concentration of the dye (Solvent Red 168) was 1%, the concentration of the levelling agent was 1 g / L, the levelling agent was prepared according to Preparation Example 2, the concentration of the chelating agent was 0.5 g / L, the chelating agent was tartaric acid (purity > 99%) and sodium hexametaphosphate (purity > 70%) configured according to a mass ratio of 1:1.2, and 10% acetic acid was added to the dye vat to adjust the pH value of the dyeing solution to 5.5-6.5;

[0067] The clothes were placed in the dye vat, the temperature was raised to 95°C, and the clothes were dyed for 30 min, after which the clothes were removed, the temperature was lowered to 40°C, and the clothes were washed for 10 min to remove the floating color, the dyed clothes were subjected to 70 s of dehydration treatment, and the wet pick-up rate was controlled to be 80% ± 5%;

[0068] The dehydrated clothes are laid flat, and the steel wire strip is bent to the required curvature according to the pre-designed pattern of the clothes. In this embodiment, an arc-shaped steel wire strip with a central angle of 120° is used. One end of the steel wire strip is placed on the clothes, and the position of the outermost circle from the center seam on one side of the clothes is measured and marked. Similarly, the position of the outermost circle from the armpit on the other side of the clothes is measured and marked. The steel wire strip is pressed on the clothes along the marked positions. Starting from the position of the steel wire strip near the center seam of the clothes, the clothes are pushed upwards to form uniform wrinkles. In this embodiment, the wrinkle height is 2 cm. During the pushing process, attention should be paid to the force to ensure that the wrinkles are uniform and natural. After pushing to the other end, high-temperature nylon straps are used to fasten the clothes and the steel wire strip together to ensure that the straps are tight and not easy to loosen, so as to prevent the dyeing process from causing unclear patterns due to dye penetration. It is confirmed that one side of the clothes is in a straight line and the other side is in an arc shape to form the basis of the fan-shaped curvature. According to the pre-designed interval, the lower part of the fixed point is fastened with high-temperature nylon straps every 10 cm in this embodiment.

[0069] The clothes with the pattern tied are placed back in the dyeing vat, and the dyeing vat roller is rotated at a speed of 30 r / min for 20 min. After dyeing is completed, the nylon straps are untied, and the clothes are shaken loose. The clothes are placed in a soaping solution with a bath ratio of 1:10. The soaping solution is selected as RC-425 soaping agent with a concentration of 1.5 g / L. The temperature is raised to 80°C and maintained for 20 min, and then reduced to 50°C and maintained for 10 min.

[0070] The clothes are placed in a modified silicone softener (type 204 from Yingyu Chemical Co., Ltd., viscosity 1500-2000 cs). The softener bath ratio is 1:10, and the softener concentration is 2 g / L. The temperature is maintained at 40°C, and the clothes are soaked for 20 min. The treated clothes are taken out and dried until completely dry.

[0071] Example 2

[0072] A sunflower pattern dyeing method for garment tie-dyeing: different from example 1 is that the leveling agent is prepared by preparation example 3.

[0073] Example 3

[0074] A sunflower pattern dyeing method for garment tie-dyeing: different from example 1 is that the leveling agent is prepared by preparation example 4.

[0075] Example 4

[0076] A sunflower pattern dyeing method for garment tie-dyeing: different from example 1 is that the leveling agent is prepared by preparation example 5.

[0077] Example 5

[0078] A sunflower pattern dyeing method for garment tie-dyeing: the difference from Example 1 is that the levelling agent is prepared from Preparation Example 6.

[0079] Example 6

[0080] A sunflower pattern dyeing method for garment tie-dyeing: the difference from Example 1 is that the soaping liquor bath ratio is 1:8.

[0081] Example 7

[0082] A sunflower pattern dyeing method for garment tie-dyeing: the difference from Example 1 is that the soaping liquor bath ratio is 1:12.

[0083] Example 8

[0084] A sunflower pattern dyeing method for garment tie-dyeing: the difference from Example 1 is that the softener bath ratio is 1:8.

[0085] Example 9

[0086] A sunflower pattern dyeing method for garment tie-dyeing: the difference from Example 1 is that the softener bath ratio is 1:12.

[0087] Example 10

[0088] A sunflower pattern dyeing method for garment tie-dyeing: the difference from Example 1 is that the softener is selected to be silicone oil.

[0089] Comparative Example

[0090] Comparative Example 1

[0091] A sunflower pattern dyeing method for garment tie-dyeing: the difference from Example 1 is that the levelling agent is selected to be type 102 levelling agent.

[0092] Comparative Example 2

[0093] A sunflower pattern dyeing method for garment tie-dyeing: the difference from Example 1 is that the concentration of the levelling agent is 0.1 g / L.

[0094] Comparative Example 3

[0095] A sunflower pattern dyeing method for garment tie-dyeing: the difference from Example 1 is that the concentration of the levelling agent is 2 g / L.

[0096] Comparative Example 4

[0097] A sunflower pattern dyeing method for garment tie-dyeing: the difference from Example 1 is that the chelating agent is selected to be tartaric acid.

[0098] Performance detection test

[0099] Detection method

[0100] The finished pattern is compared with the design draft using image processing software to check the difference between the tie-dye printed pattern area and the preset pattern area.

[0101] The edge and center of the tie-dye printing are detected for color difference using an Agilent Ci7x00 series desktop spectrophotometer.

[0102] Table 1 Detection results

[0103] As can be seen from the combination of Example 1 and Comparative Example 1 and Table 1, the plant extract as a natural ingredient has good dispersibility and permeability, which can help the dye to be more evenly distributed in the fibers of the clothes, reducing the color spots and color flowers. At the same time, the small particle structure of nano-silicon dioxide further enhances the dispersion effect of the dye, making the dyeing more uniform and delicate. Polyethylene glycol (PEG) as a commonly used non-ionic surfactant has good wetting and film-forming properties. During the dyeing process, PEG can wrap the dye molecules to form a thin film, which helps the dye to better adhere to the fibers of the clothes, improving the dyeing fastness and color brightness. Surfactants play a key role in leveling agents, which can reduce the interfacial tension between the dyeing liquid and the fibers of the clothes, promoting the penetration of dye molecules into the fibers. This not only improves the dyeing efficiency, but also makes the dyeing more thorough and the color more saturated. The use of plant extracts makes the leveling agent more environmentally friendly, reducing the use of chemical synthetics, meeting the requirements of modern textile industry for green and sustainable development. At the same time, nano-silicon dioxide as an inorganic nanomaterial also has high biological safety and environmental friendliness.

[0104] As can be seen from the combination of Example 1 and Comparative Examples 2-3 and Table 1, the low concentration of the leveling agent results in insufficient dyeing uniformity, and when the concentration of the leveling agent is too high, it will produce excessive dyeing resistance, leading to a decrease in dye uptake and an increase in color difference.

[0105] As can be seen from the combination of Example 1 and Comparative Example 4 and Table 1, through the synergistic effect of tartaric acid and sodium hexametaphosphate, the influence of metal ions on the dye can be effectively prevented, maintaining the color stability of the dye. This helps to reduce color difference, color flowers and other problems during the dyeing process, improving the quality of the finished dyeing products.

[0106] As can be seen from Examples 1-5 and Table 1, the active ingredients in madder can be firmly combined with the fibers of the clothes, improving the fastness and color stability of the dyeing. Sodium alginate, as an ideal paste for reactive dye printing, plays an important role in the dyeing process. The negative charge in its molecular structure helps to promote dye uptake and prevent dye from combining with the paste, thereby improving the uniformity and clarity of the dyeing. Sodium alginate also has good film-forming properties, which can form a protective film on the surface of the clothes fibers, enhancing the adhesion between the dye and the fiber, making the dyeing more firm and durable. Plant extracts, as natural ingredients, have good dispersibility and permeability, which can help the dye to be more evenly distributed in the clothes fibers, reducing color spots and color phenomena. At the same time, the small particle structure of nano-silicon dioxide further enhances the dispersion effect of the dye, making the dyeing more uniform and delicate.

[0107] As can be seen from Examples 1 and 6-10 and Table 1, RC-425 soaping agent shows excellent stain removal ability in this concentration range. It can effectively remove unfastened dyes, hydrolyzed dyes, oils and other impurities on the surface and inside of the fabric, thereby ensuring the cleanliness and brightness of the dyed product. Bath ratio 1:10 ensures that the softener can fully and uniformly penetrate into the fabric fibers, avoiding the problem of uneven distribution of softener caused by too high or too low bath ratio. Modified silicone softener can enhance the bonding force between dye and fiber, improve the fixation efficiency of dye, thereby reducing the possibility of dye shedding during subsequent processing or use, which also helps to reduce color difference.

Claims

1. A sunflower pattern dyeing method for ready-made clothes, comprising the following steps: Prepare a dyeing bath with a bath ratio of 1:(11-13), a dye concentration of 0.5-1.5%, the addition of 0.5-1.5 g / L of a leveling agent and 0.1-1 g / L of a chelating agent, and the addition of acetic acid to adjust the pH value of the dyeing solution to 5.5-6.5; Put the clothes into the dyeing bath, heat to 90-97℃, keep for 20-40 min for dyeing, take out the clothes after dyeing, cool to 35-45℃, wash for 5-15 min to remove the floating color, and then dehydrate the dyed clothes for 60-80 s to control the wet pick-up rate at 80%±5%; Lay the dehydrated clothes flat, press the arc-shaped strips on the surface of the clothes according to the size of the clothes, and then push the clothes from one end of the arc-shaped strips to the other end along the arc direction to form folds with equal height, and then fasten the clothes at equal distances by using multiple straps; Put the clothes with the pattern fastened by the straps back into the dyeing bath, rotate the dyeing drum at a speed of 20-40 r / min, remove the nylon straps after dyeing, shake the clothes, put the clothes into a soaping solution, heat to 75-85℃, keep for 15-30 min, then cool to 45-55℃, and keep for 5-15 min; Put the clothes into a softener, keep at 35-45℃, soak for 15-30 min, take out the treated clothes, and then dry until completely dry.

2. The sunflower pattern dyeing method for garment tie dyeing according to claim 1, wherein, The leveling agent comprises 20-30% of plant extract, 5-10% of nano-silicon dioxide, 40-60% of polyethylene glycol, and 15-25% of surfactant by mass percentage.

3. The sunflower pattern dyeing method for garment tie dyeing according to claim 2, wherein, The plant extract comprises 30-50 parts of madder extract, 40-80 parts of tea tree essential oil, and 20-30 parts of sodium alginate by weight.

4. The sunflower pattern dyeing method for garment tie dyeing according to claim 3, wherein, The preparation method of the madder extract is as follows: Put madder root powder into a reaction container, add an ethanol solution with a mass concentration of 65%-95%, and the mass ratio of the madder root powder to the ethanol solution is 1:(1-3), vacuumize the reaction container to 0.7-1.1 bar, and then supplement nitrogen to maintain stable pressure; Use a stirring device with a mechanical rotation speed of 3000-5000 r / min to stir the reaction container, and repeat the stirring for 3-5 times with a stirring time of 5-8 min each time, filter the extract after stirring to obtain a madder extract solution; Add 10-50% of activated carbon by mass of the extract solution to the madder extract solution, stir uniformly, stand for 4-8 h, and then filter to remove the activated carbon and solid impurities to obtain a decolorized madder extract solution; Concentrate the decolorized madder extract solution by rotary evaporation, set the vacuum degree to 100-200 mbar, the water bath temperature to 50-60℃, and the concentration time to 3-5 h to obtain a concentrated madder extract; Centrifuge the concentrated madder extract at 1500-4000 r / min for 3-10 min, and take the supernatant to obtain the madder extract.

5. The sunflower pattern dyeing method for pull-dyeing of garment according to claim 1, wherein, The chelating agent is prepared by mixing tartaric acid and sodium hexametaphosphate at a mass ratio of 1:(1-1.5).

6. The sunflower pattern dyeing method for pull-on tie dyeing according to claim 1, wherein, The soaping liquor bath ratio is 1:10, and the soaping liquor is RC-425 soaping agent with a concentration of 1.3-1.7 g / L.

7. The sunflower pattern dyeing method for pull-dyeing of garment according to claim 1, wherein, The softener bath ratio is 1:10, and the softener concentration is 2 g / L.

8. The sunburst pattern dyeing method for garment tie dyeing according to claim 7, wherein, The softener is a modified silicone softener.

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