Dyeing process for plant tie-dyeing

Abstract

The invention provides a plant tie-dyeing process which comprises the following steps: S1, scouring and bleaching: adding an auxiliary agent into a to-be-dyed fabric, stirring, cooling after running for a certain time, and then cleaning the to-be-dyed fabric; s2, tie-dyeing pretreatment: after the fabric to be dyed is scoured and bleached, adding a pretreatment auxiliary agent, operating at a certain temperature for a certain time, and then cooling and cleaning; a pattern is grabbed on a to-be-dyed fabric according to needs, then the prepared dye liquor is sprayed on the to-be-dyed fabric, the to-be-dyed fabric is put into a dye vat for high-temperature dyeing, and the dyeing effect is achieved; the method can realize tie-dyeing operation on fibers through vegetable dyes, and aims at solving the problems of non-environment-friendly printing and dyeing of synthetic dyes and large discharge of printing and dyeing wastewater at present.

Description

Technical Field

[0001] The invention relates to the technical field of dyeing, in particular to a dyeing process of plant tie-dyeing. Background Art

[0002] Tie-dyeing is a traditional Chinese folk craft. As early as in the Yuan Dynasty, it was mentioned in "Zizhi Tongjian Yinzhu": "Pick up the pieces and tie them with thread, and then dye them. After dyeing, untie the knots. All the knots are original color, and the rest are dyed." This clearly explains the process and methods of traditional tie-dyeing.

[0003] Traditional tie-dyeing, with its handmade production and unique color-shading mechanism, has been widely spread around the world and has a far-reaching impact. However, due to many restrictive factors such as long operation time, unstable color and flower shape control, and single flat expression in manual production, the market price is high, the fabric is easy to fade, and the pattern design is unpredictable, which restricts the market development of traditional crafts. The innovative development of tie-dyeing technology is the best inheritance and continuation of traditional crafts. In order to continue to ensure the quality and artistic charm of tie-dye fabrics, and at the same time improve the efficiency of dyeing and weaving and the stability of dyed fabrics, the traditional tie-dyeing technology needs to make technical explorations on the tools, materials, and means of binding and dyeing, and it is in urgent need of effective industrialization methods.

[0004] Plant dyes are natural dyes, the essence of plants, without any dispersants, solubilizers, chelating agents, etc. added to chemical commodity dyes. Plant dyes are soft, solemn and elegant, and naturally unique, which synthetic dyes cannot match; they are non-toxic and harmless, non-allergenic and non-carcinogenic to the skin, and have good biodegradability and environmental compatibility. They also have excellent antibacterial properties and have broad development prospects in the fields of home textile products, high-end silk products, decorative items, etc.

[0005] So far, there is still little in-depth research on plant dyes. How to choose appropriate conditions so that the dyeing process of plant dyes can meet the requirements of industrial production and the color fastness level meets the standards for clothing is a problem that needs to be solved. In particular, plant dyeing yarn is prone to layer differences, so it has not been industrialized so far.

[0006] Chinese patent application number CN201811436890.5 discloses a cashmere cone yarn plant dyeing process, which uses ultrasonic treatment combined with a suitable treatment liquid in the pre-dyeing step to make the cashmere better dyed. Plant dyes are used in the dyeing step with appropriate dyeing auxiliaries to improve the color fastness and uniformity of the cashmere, but it is only for cashmere cone yarn, and its application scope is limited.

[0007] Chinese patent CN103451964B discloses a pure natural plant dyeing process for handmade natural summer cloth, which includes the following steps: 1. Make the raw materials into dye juice and seal it for storage; 2. Soak the summer cloth in alkaline water, then take it out and put it in a sealed container for natural fermentation for one week; 3. Then pull out the cloth for cleaning, use clean water and sulfuric acid for cleaning, then put it into the equipment for scouring, bleach and clean it after scouring to remove impurities on the cloth; 4. After the dye juice is adjusted, put it into the dyeing machine for the first dyeing; 5. Add a color fixing agent in the dyeing machine for fixing and washing, and then dye it for the second time. After dyeing, dry it, arrange it, and put it into storage. In this process, the summer cloth treatment requires a large amount of water, and the wastewater discharge increases environmental pressure. Summary of the invention

[0008] In view of this, the object of the present invention is to provide a plant tie-dyeing process that can realize tie-dyeing of fibers by plant dyes, aiming at the current environmentally unfriendly printing and dyeing with synthetic dyes and the large discharge of printing and dyeing wastewater.

[0009] The present invention is implemented by the following method: a plant tie-dyeing dyeing process, the dyeing process comprising the following steps:

[0010] Step S1, scouring and bleaching, adding auxiliaries to the fabric to be dyed and stirring, running for a certain period of time and then cooling down, and then washing the fabric to be dyed;

[0011] Step S2, tie-dyeing pre-treatment: After the fabric to be dyed is scourged and bleached, a pre-treatment auxiliary agent is added and the process is run at a certain time and temperature.

[0012] Then cool down and clean;

[0013] Step S3, dyeing: a pattern is drawn on the fabric to be dyed according to the requirements, and then the prepared dye solution is poured on the fabric to be dyed, and the fabric to be dyed is put into a dyeing vat for high-temperature dyeing to achieve the dyeing effect.

[0014] Furthermore, the components of the auxiliary agent in step S1 are measured by weight: 1.5g / L-2g / L of flake caustic soda, 6g / L-8g / L of hydrogen peroxide, and 0.5g / L-1g / L of plant penetrant; the running time is 5-10 minutes, and then the temperature is increased by 3°C per minute until the temperature reaches 98°C, and then the fabric to be dyed is immersed in it for 30 minutes, and then the temperature is reduced by 3°C per minute to rinse the fabric to be dyed, and then the process ends.

[0015] Furthermore, the components of the pretreatment auxiliary agent in step S2 are calculated by weight: 5g / L-10g / L of sodium sulfate, 0.5g / L-1g / L of modification auxiliary agent, and the pH value is maintained between 8 and 10; the operation time is 10-15 minutes, and then the temperature is increased by 3°C per minute until the temperature reaches 80°C, soaked for 30-40 minutes, and then the fabric to be dyed is rinsed by cooling by 3°C per minute, and then finished.

[0016] Furthermore, the dye solution in step S3 includes plant oxyphylla, lutein, chlorophyll, holly leaves, coffee trees, violets, orange, berberine, isatis root, violets, bamboo charcoal ash and cochineal red, which are formulated according to different plant colors. The components of the single color are calculated by weight: 5%-8% of cochineal red and 92%-95% of clean water; the components of the two colors are calculated by weight: 4%-6% of oxyphylla, 8%-10% of coffee trees, and 84%-88% of clean water; the components of the three colors are calculated by weight: 5%-8% of oxyphylla, 7%-10% of isatis root, 10%-13% of bamboo charcoal ash, and 69%-78% of clean water.

[0017] Furthermore, the high temperature dyeing in step S3 is steam dyeing or immersion dyeing, and then the dyeing liquid is mixed in the dyeing vat, the fabric to be dyed is dyed at a temperature of 100° C. for 30-35 minutes to achieve coloring of the fabric to be dyed.

[0018] The beneficial effects of the present invention are as follows: during the dyeing process, after the fabric is exposed to water and expands at high temperature, it maintains a fixed shape and appropriate tightness, and the fabric after tie-dyeing shows a prominent layered and three-dimensional pattern effect; through the pre-dyeing treatment and dye solution preparation process, the fabric is fully penetrated and emulsified, which can improve the tie-dyeing efficiency, and the dyed fabric has uniform color and high color fastness, forming a tie-dye fabric with rich colors and uniform transition between light and dark colors; by achieving consistency and stability of printing quality, the tie-dye fabric has high product reproducibility and can achieve market development; labor costs are saved, and the technical defects of natural plant pad printing that is difficult to mass produce due to complex process and the color is relatively light and the pattern is blurred are solved; the present invention discloses The plant dyeing method for textile fabrics uses pure plant dyes to print and dye the grey fabrics. The invention has the characteristics of being friendly to the human body and the environment. The plant dyeing technology is applied to clothing and apparel products, which can increase the consumer's selectivity and ensure the consumer's health. The invention adds as few additives as possible during the tie-dyeing process to ensure the coloring rate and printing and dyeing effects while reducing the demand and discharge of printing and dyeing wastewater, reducing pollution and pressure on the environment, and not destroying the ecological balance. The textile fabric obtained by the invention does not fade, has a delicate and soft luster, can be directly in contact with the skin, has good safety, is not allergic, carcinogenic, teratogenic, etc., has broad prospects in the market, is low in cost, has a simple process, and is easy to expand production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the process flow of the present invention.

[0020] Figure 2 Schematic diagram of steam-dyed fabric products.

[0021] Figure 3 Schematic diagram of a fabric product that is dyed using the dip dyeing method. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] See also Figure 1 As shown, the present invention provides: a plant tie-dyeing dyeing process, the dyeing process comprising the following steps:

[0024] Step S1, scouring and bleaching, adding auxiliaries to the fabric to be dyed and stirring, running for a certain period of time and then cooling down, and then washing the fabric to be dyed;

[0025] Step S2, tie-dyeing pre-treatment: After the fabric to be dyed is scourged and bleached, a pre-treatment auxiliary agent is added and the process is run at a certain time and temperature.

[0026] Then cool down and clean;

[0027] Step S3, dyeing: a pattern is drawn on the fabric to be dyed according to the requirements, and then the prepared dye solution is poured on the fabric to be dyed, and the fabric to be dyed is put into a dyeing vat for high-temperature dyeing to achieve the dyeing effect.

[0028] The invention is suitable for dyeing natural fibers or artificial fibers.

[0029] Embodiment 1:

[0030] Monochrome dyeing, dye by weight: carmine 5%, water 95%, mix and stir to form dye liquor, first add scouring and bleaching aid to the fabric to be dyed and run for 5 minutes, scouring and bleaching aid by weight: caustic soda 1.5g / L, hydrogen peroxide 6g / L, plant penetrant 0.5g / L, then increase the temperature by 3°C per minute until it reaches 98°C, bleach for 30 minutes, start cooling and washing, cool down by 3°C per minute until it reaches room temperature; then perform pre-dyeing treatment, add pre-treatment aid and run for 10 minutes, pre-treatment aid by weight: sodium sulfate 5 g / L, modification auxiliary agent 0.5g / L, then the pH value is maintained between 8-10, and then it is increased by 3℃ per minute until it reaches 80℃. After 30 minutes, start cooling and cleaning, and cool it down by 3℃ per minute until it reaches room temperature; then manually grab the pattern on the fabric to be dyed according to needs. The conventional pattern grabbing width requires 5-6 times, and the pattern height spacing is 30-50cm. Pour the prepared dye solution on the fabric to be dyed, and then put the fabric to be dyed into the dyeing vat, soak it at 100℃ for 30 minutes, and then it can be taken out of the vat to achieve the dyeing effect of the fiber.

[0031] The plant penetrant is fatty alcohol polyoxyethylene ether, which is a nonionic surfactant, and the modification aid can be a surface adjuster (including sliding aids - slipaids, anti-adhesion agents - anti-blocking, and scratch-resistant aids).

[0032] Embodiment 2:

[0033] Two-color dyeing, dye by weight: 4% annatto, 8% coffee tree, 84% water, mix and stir to form a dye solution,

[0034] First, add the scouring and bleaching aid to the fabric to be dyed and run it for 5 minutes. The scouring and bleaching aids are calculated by weight: 2g / L of flake caustic soda, 8g / L of hydrogen peroxide, and 1g / L of plant penetrant. Then increase the temperature by 3°C per minute until it reaches 98°C, bleach for 30 minutes, and start cooling and washing. Cool down by 3°C per minute until it reaches room temperature. Then, perform pre-dyeing treatment, add pre-treatment aids and run it for 10 minutes. The pre-treatment aids are calculated by weight: 8g / L of sodium sulfate, 1g / L of modified aids, Then the pH value is kept between 8-10, and then the temperature is increased by 3℃ per minute until it reaches 80℃. After 30 minutes, the temperature is lowered and cleaned, and the temperature is lowered by 3℃ per minute until it reaches room temperature. Then, the pattern is manually grabbed on the fabric to be dyed according to the needs. The conventional pattern grabbing door width requires 5-6 times, and the pattern height spacing is 30-50cm. The prepared dye solution is poured on the fabric to be dyed, and then the fabric to be dyed is put into the dyeing tank and soaked at 100℃ for 30 minutes, and then it can be taken out of the tank.

[0035] To achieve the dyeing effect of fibers.

[0036] It is worth mentioning that there are two types of high-temperature dyeing. The first is steam dyeing, which produces intensive patterns. The second is immersion dyeing, which produces radial patterns. Choose according to your needs, and then put the fabric to be dyed into the corresponding equipment for dyeing.

[0037] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A plant tie-dyeing process, characterized in that: The dyeing process comprises the following steps: Step S1, scouring and bleaching, adding auxiliaries to the fabric to be dyed and stirring, running for a certain period of time and then cooling down, and then washing the fabric to be dyed; Step S2, tie-dyeing pre-treatment: after the fabric to be dyed is scourged and bleached, a pre-treatment auxiliary agent is added, the fabric is operated at a certain time and temperature, and then cooled and cleaned; Step S3, dyeing: a pattern is drawn on the fabric to be dyed according to the requirements, and then the prepared dye solution is poured on the fabric to be dyed, and the fabric to be dyed is put into a dyeing vat for high-temperature dyeing to achieve the dyeing effect.

2. A plant tie-dyeing process according to claim 1, characterized in that: The components of the auxiliary agents in step S1 are calculated by weight: 1.5g / L-2g / L of flake caustic soda, 6g / L-8g / L of hydrogen peroxide, and 0.5g / L-1g / L of plant penetrant; the operation time is 5-10 minutes, and then the temperature is increased by 3°C per minute until the temperature reaches 98°C, and then the fabric to be dyed is immersed in it for 30 minutes, and then the temperature is reduced by 3°C per minute to rinse the fabric to be dyed, and the process ends.

3. The plant tie-dyeing process according to claim 1, characterized in that: The components of the pre-treatment auxiliary agent in step S2 are calculated by weight: 5g / L-10g / L of sodium sulfate, 0.5g / L-1g / L of modification auxiliary agent, and the pH value is maintained between 8 and 10; the operation time is 10-15 minutes, and then the temperature is increased by 3°C per minute until the temperature reaches 80°C, soaking for 30-40 minutes, and then the fabric to be dyed is rinsed by cooling by 3°C per minute, and then the process ends.

4. The plant tie-dyeing process according to claim 1, characterized in that: The dye solution in step S3 includes plant oxyphyllin, lutein, chlorophyll, holly leaves, coffee trees, violets, orange, berberine, isatis root, violets, bamboo charcoal ash and cochineal red, which are prepared according to different plant colors. The components of the single color are calculated by weight: cochineal red 5%-8%, clean water 92%-95%; the components of the two colors are calculated by weight: oxyphyllin 4%-6%, coffee trees 8%-10%, clean water 84%-88%; the components of the three colors are calculated by weight: oxyphyllin 5%-8%, isatis root 7%-10%, bamboo charcoal ash 10%-13%, clean water 69%-78%.

5. The plant tie-dyeing process according to claim 1, characterized in that: The high temperature dyeing in step S3 is steam dyeing or immersion dyeing, and then the dyeing liquid is mixed in the dyeing tank, the fabric to be dyed is dyed at a temperature of 100° C. for 30-35 minutes to achieve coloring of the fabric to be dyed.

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