Water-saving printing and dyeing method for fabric
Through a fabric water-saving dyeing method including pretreatment, modification, dyeing and water washing stages, the high water resource consumption and pollution problems in the textile printing and dyeing industry are solved, and efficient, economical and environmentally friendly printing and dyeing production is achieved.
Patent Information
- Application Number
- CN202411735690.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-03-21
AI Technical Summary
The textile printing and dyeing industry faces severe environmental challenges due to traditional processes due to high water resource consumption and pollution emissions, and the existing water-saving dyeing technology has problems of stability and high cost.
A water-saving dyeing method for fabrics is adopted, including pretreatment, modification, dyeing and water washing stages. Desorption is performed by using a solution containing a desorption agent, an oil remover and sodium hydroxide in the pretreatment stage; in the modification stage, the fabric is placed in the dopamine and chitosan modification solution for modification; in the dyeing stage, a phased heating dyeing step is used to improve the adsorption and fixation of the dye; in the water washing stage, deionized water is used for gentle stirring or scrubbing.
It significantly reduces water consumption and is expected to save 80% water, improves dyeing efficiency and color fastness, reduces wastewater discharge, and reduces energy consumption.
Smart Images
Figure SMS_1
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of printing and dyeing, and in particular to a water-saving printing and dyeing method for fabrics. Background Art
[0002] As global water resources become increasingly scarce, the textile printing and dyeing industry, as a key area of water resource consumption and pollution emissions, faces severe challenges. Traditional printing and dyeing processes often require a large amount of water resources, and the wastewater produced often contains high concentrations of pollutants, posing a serious threat to the environment and ecosystem. Therefore, developing a water-saving printing and dyeing method can not only effectively reduce water resource consumption, but also reduce environmental pollution, becoming an important research direction in the current textile printing and dyeing industry.
[0003] The traditional printing and dyeing process mainly includes three steps: pre-treatment, dyeing and post-treatment of fabrics. A large amount of water is required for dilution and adjustment in the pre-treatment desizing process and in the dyeing stage. In the post-treatment stage, in order to remove the unfixed dyes and auxiliaries on the fabric, multiple washings are required. These steps together lead to high water resource consumption in the textile printing and dyeing industry. In order to cope with this problem, researchers at home and abroad have carried out a lot of research on water-saving printing and dyeing technology. These studies mainly focus on two aspects: one is to optimize the traditional printing and dyeing process and reduce the amount of water by improving equipment and process parameters; the other is to develop new printing and dyeing technologies, such as waterless printing and dyeing, ultrasonic printing and dyeing, etc. These technologies can reduce or replace the use of water to a certain extent.
[0004] However, existing water-saving printing and dyeing technologies still have some limitations. For example, although waterless printing and dyeing technology can significantly reduce water consumption, it still has shortcomings in process stability and dyeing effect. Although ultrasonic printing and dyeing technology can improve dyeing efficiency, its equipment cost is high and its adaptability to dyes is limited. Therefore, it is still of great significance to develop a printing and dyeing method that is both water-saving and economical and environmentally friendly. Based on this, the present invention provides a water-saving printing and dyeing method for fabrics. Summary of the invention
[0005] The purpose of the present invention is to provide a water-saving printing and dyeing method for fabrics, which significantly reduces water consumption, improves printing and dyeing efficiency and color fastness, and realizes environmentally friendly printing and dyeing production.
[0006] In one aspect, the present invention provides a water-saving printing and dyeing method for fabrics, comprising the steps of: (1) Pretreatment stage: The fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:(12-16), and desizing is performed by stirring at 40-50°C for 30-40 minutes. After the treatment is completed, the fabric is rinsed with clean water to remove the residual pretreatment agent and naturally air-dried; (2) Modification stage: the pretreated polyester fabric is placed in the first modification liquid and shaken for 20-30 minutes and then dried. Subsequently, the fabric treated with the first modification liquid is placed in the second modification liquid and heated at 50-70°C for 60-70 minutes. After being taken out, it is naturally air-dried to obtain a modified polyester fabric. (3) Dyeing stage: soaking the modified fabric in dye solution for dyeing, the weight ratio of the modified fabric to the dye solution is 1: (20-26); (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 10-20 minutes at room temperature, and then air dry naturally.
[0007] Furthermore, the solution of the pretreatment agent includes 2-3 g / L of a desizing agent, 0.8-1.2 g / L of a degreasing agent and 20-30 g / L of sodium hydroxide.
[0008] Furthermore, the preparation method of the first modified liquid includes: dissolving dopamine hydrochloride powder in a Tris-HCl buffer solution with a concentration of 0.05-0.1 mol / L and a pH of 8.5, and adding H2O2 and ammonium persulfate to obtain the modified liquid.
[0009] Furthermore, the dosage ratio of the dopamine hydrochloride powder, Tris-HCl buffer, H2O2 and ammonium persulfate is (0.4-0.6) mg: (50-60) mL: (0.2-0.6) mL: (0.02-0.04) g.
[0010] Furthermore, the preparation method of the second modified liquid includes: taking 1-1.2g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 2-3%.
[0011] Furthermore, in the step (2), the weight ratio of the fabric to the first modifying liquid is 1:(30-40), and the weight ratio of the fabric to the second modifying liquid is 1:(30-40).
[0012] Furthermore, the dyeing step in step (3) includes: starting stirring after soaking, heating to 70-80°C at a rate of 0.5-1°C / min, maintaining this temperature for dyeing for 15-20 minutes, stopping stirring, continuing to heat to 90-100°C at a rate of 1-2°C / min, maintaining for 6-10 minutes, and then naturally cooling to room temperature.
[0013] Furthermore, the dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of (2-4): (0.1-0.2): (0.15-0.25): (18-22).
[0014] Furthermore, the disperse dye includes one or more of disperse violet HFRL, disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801.
[0015] Furthermore, the fabric is polyester.
[0016] The beneficial effects of the present invention are: The present invention does not require high temperature conditions, thus reducing energy consumption; the dyeing efficiency is high, and it is estimated that 80% of water can be saved; and the dyed water has a high color fastness between the dye and the fabric, and the water after washing can be recycled, thus reducing wastewater discharge; The present invention is modified twice. First, dopamine hydrochloride undergoes a self-polymerization reaction under alkaline conditions and the action of an oxidant to form a polydopamine layer; this layer can firmly adhere to the surface of the polyester fiber, providing additional attachment points and reactive functional groups, laying the foundation for the subsequent second modification liquid treatment and the adsorption and fixation of dye molecules. In the second modification liquid, chitosan molecules can penetrate into the polydopamine layer and form a chemical bond with the surface of the polyester fiber; this combination not only enhances the polarity of the fiber surface, but also provides more dye binding sites, thereby improving the adsorption capacity and color fastness of the dye.
[0017] In the present invention, the chemical structure and physical properties of the polyester fiber surface are improved through modification treatment, so that the dye molecules are more easily adsorbed and fixed on the fiber. In the printing and dyeing process of the modified polyester fabric, the utilization rate of the dye molecules is higher, and the number of additional washings caused by dye waste is reduced, thereby reducing water consumption. In addition, after the fabric of the present invention is modified, it can be carried out to the next dyeing step without washing, which significantly reduces the consumption of water resources, and this method without washing makes the dye molecules more easily adsorbed and fixed on the fiber during the dyeing process, thereby improving the fixing force of the dye.
[0018] The dyeing step of the present invention optimizes the heating rate and the heat preservation time in the dyeing step and adopts a staged heating method, which not only ensures the full adsorption and diffusion of dye molecules, but also avoids fabric damage and excessive decomposition of dyes due to high temperature; the appropriate temperature promotes the deep diffusion and stable fixation of dye molecules inside the fiber, and also reduces the number of additional washing times caused by uneven dyeing or dye waste, thereby reducing water consumption; finally, the natural cooling process ensures that the combination between the dye molecules and the fiber is further stabilized, thereby improving color fastness. DETAILED DESCRIPTION
[0019] The technical scheme of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the raw materials can be obtained commercially. Example
[0020] This embodiment provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:14, and desizing is performed by stirring at 45°C for 35 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2.5 g / L of desizing agent DM-1322A, 1 g / L of degreasing agent NX-138A and 25 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid and shaken for 25 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:35, then the fabric treated with the first modifying liquid is placed in the second modifying liquid, the weight ratio of the fabric to the second modifying liquid is 1:35, heated at 60°C for 65 minutes, taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.5 mg of dopamine hydrochloride powder in 55 mL of Tris-HCl buffer with a concentration of 0.07 mol / L and a pH of 8.5, and adding 0.4 mL of H2O2 and 0.03 g of ammonium persulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1.1g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 2.5%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:23; after immersion, stirring is started, and the temperature is raised to 75°C at a rate of 0.7°C / min, and the temperature is maintained for dyeing for 17 minutes. Stirring is stopped, and the temperature is continued to be raised to 95°C at a rate of 1.5°C / min, maintained for 8 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 3:0.15:0.2:20; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; In a further embodiment, the disperse dye solution may also be one or more of disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally. Example
[0021] This embodiment provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:12, and desizing is performed by stirring at 40°C for 30 min. After the treatment is completed, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2 g / L of desizing agent DM-1322A, 0.8 g / L of degreasing agent NX-138A and 20 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid and shaken for 20 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:30, and then the fabric treated with the first modifying liquid is placed in the second modifying liquid, the weight ratio of the fabric to the second modifying liquid is 1:30, heated at 50°C for 60 minutes, taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.4 mg of dopamine hydrochloride powder in 50 mL of Tris-HCl buffer with a concentration of 0.05 mol / L and a pH of 8.5, and adding 0.2 mL of H2O2 and 0.02 g of ammonium persulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 2%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:20; after immersion, stirring is started, and the temperature is raised to 70°C at a rate of 0.5°C / min, and the temperature is maintained for dyeing for 15 minutes. Stirring is stopped, and the temperature is continued to be raised to 90°C at a rate of 1°C / min, maintained for 6 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 2:0.1:0.15:18; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 10 minutes at room temperature, and then air dry naturally. Example
[0022] This embodiment provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:16, and desizing is performed by stirring at 50°C for 40 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 3 g / L of desizing agent DM-1322A, 1.2 g / L of degreasing agent NX-138A and 30 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid and shaken for 30 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:40, and then the fabric treated with the first modifying liquid is placed in the second modifying liquid, the weight ratio of the fabric to the second modifying liquid is 1:40, heated at 70°C for 70 minutes, taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.6 mg of dopamine hydrochloride powder in 60 mL of Tris-HCl buffer with a concentration of 0.1 mol / L and a pH of 8.5, and adding 0.6 mL of H2O2 and 0.04 g of ammonium persulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1.2g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 3%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:26; after immersion, stirring is started, and the temperature is raised to 80°C at a rate of 1°C / min, and the temperature is maintained for dyeing for 20 minutes. Stirring is stopped, and the temperature is continued to be raised to 100°C at a rate of 2°C / min, maintained for 10 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 4:0.2:0.25:22; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 20 minutes at room temperature, and then air dry naturally. Example
[0023] This embodiment provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:12, and desizing is performed by stirring at 50°C for 30 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 3 g / L of desizing agent DM-1322A, 0.8 g / L of degreasing agent NX-138A and 30 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid and shaken for 20 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:40, and then the fabric treated with the first modifying liquid is placed in the second modifying liquid, the weight ratio of the fabric to the second modifying liquid is 1:30, heated at 70°C for 60 minutes, taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.6 mg of dopamine hydrochloride powder in 50 mL of Tris-HCl buffer with a concentration of 0.1 mol / L and a pH of 8.5, and adding 0.2 mL of H2O2 and 0.04 g of ammonium persulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 3%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:20; after immersion, stirring is started, and the temperature is raised to 70°C at a rate of 1°C / min, and the temperature is maintained for dyeing for 20 minutes. Stirring is stopped, and the temperature is continued to be raised to 100°C at a rate of 1°C / min, maintained for 6 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 4:0.1:0.25:18; the disperse dye is disperse violet, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally.
[0024] This comparative example provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:14, and desizing is performed by stirring at 45°C for 35 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2.5 g / L of desizing agent DM-1322A, 1 g / L of degreasing agent NX-138A and 25 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the modification liquid and shaken for 25 minutes and then dried, the weight ratio of the fabric to the modification liquid is 1:35, and the fabric is taken out and naturally air-dried to obtain the modified polyester fabric; the preparation method of the modification liquid comprises: dissolving 0.5 mg of dopamine hydrochloride powder in 55 mL of Tris-HCl buffer with a concentration of 0.07 mol / L and a pH of 8.5, and adding 0.4 mL of H2O2 and 0.03 g of ammonium persulfate to obtain the modified polyester fabric; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:23; after immersion, stirring is started, and the temperature is raised to 75°C at a rate of 0.7°C / min, and the temperature is maintained for dyeing for 17 minutes. Stirring is stopped, and the temperature is continued to be raised to 95°C at a rate of 1.5°C / min, maintained for 8 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 3:0.15:0.2:20; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; In a further embodiment, the disperse dye solution may also be one or more of disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally.
[0025] This comparative example provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:14, and desizing is performed by stirring at 45°C for 35 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2.5 g / L of desizing agent DM-1322A, 1 g / L of degreasing agent NX-138A and 25 g / L of sodium hydroxide; (2) Modification stage: placing the pretreated polyester fabric in a modification solution, wherein the weight ratio of the fabric to the modification solution is 1:35, heating the fabric at 60°C for 65 minutes, taking the fabric out and naturally air-drying the fabric to obtain a modified polyester fabric; the modification solution is prepared by dissolving 1.1 g of chitosan in a citric acid aqueous solution having a mass concentration of 2.5%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:23; after immersion, stirring is started, and the temperature is raised to 75°C at a rate of 0.7°C / min, and the temperature is maintained for dyeing for 17 minutes. Stirring is stopped, and the temperature is continued to be raised to 95°C at a rate of 1.5°C / min, maintained for 8 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 3:0.15:0.2:20; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; In a further embodiment, the disperse dye solution may also be one or more of disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally.
[0026] This comparative example provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:14, and desizing is performed by stirring at 45°C for 35 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2.5 g / L of desizing agent DM-1322A, 1 g / L of degreasing agent NX-138A and 25 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid, shaken at 60°C for 25 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:35, then the fabric treated with the first modifying liquid is placed in the second modifying liquid, the weight ratio of the fabric to the second modifying liquid is 1:35, heated at 60°C for 65 minutes, taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.5 mg of dopamine hydrochloride powder in 55 mL of Tris-HCl buffer with a concentration of 0.07 mol / L and a pH of 8.5, and adding 0.4 mL of H2O2 and 0.03 g of ammonium persulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1.1g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 2.5%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:23; after immersion, stirring is started, and the temperature is raised to 75°C at a rate of 0.7°C / min, and the temperature is maintained for dyeing for 17 minutes. Stirring is stopped, and the temperature is continued to be raised to 95°C at a rate of 1.5°C / min, maintained for 8 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 3:0.15:0.2:20; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; In a further embodiment, the disperse dye solution may also be one or more of disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally.
[0027] This comparative example provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:14, and desizing is performed by stirring at 45°C for 35 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2.5 g / L of desizing agent DM-1322A, 1 g / L of degreasing agent NX-138A and 25 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid and shaken for 25 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:35, then the fabric treated with the first modifying liquid is placed in the second modifying liquid and shaken for 65 minutes, the weight ratio of the fabric to the second modifying liquid is 1:35, and then taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.5 mg of dopamine hydrochloride powder in 55 mL of Tris-HCl buffer with a concentration of 0.07 mol / L and a pH of 8.5, and adding 0.4 mL of H2O2 and 0.03 g of ammonium persulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1.1g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 2.5%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:23; after immersion, stirring is started, and the temperature is raised to 75°C at a rate of 0.7°C / min, and the temperature is maintained for dyeing for 17 minutes. Stirring is stopped, and the temperature is continued to be raised to 95°C at a rate of 1.5°C / min, maintained for 8 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 3:0.15:0.2:20; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; In a further embodiment, the disperse dye solution may also be one or more of disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally.
[0028] This comparative example provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:14, and desizing is performed by stirring at 45°C for 35 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2.5 g / L of desizing agent DM-1322A, 1 g / L of degreasing agent NX-138A and 25 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid and shaken for 25 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:35, then the fabric treated with the first modifying liquid is placed in the second modifying liquid, the weight ratio of the fabric to the second modifying liquid is 1:35, heated at 60°C for 65 minutes, taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.5 mg of dopamine hydrochloride powder in 55 mL of Tris-HCl buffer with a concentration of 0.07 mol / L and a pH of 8.5, and adding 0.4 mL of H2O2 and 0.02 g of copper sulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1.1g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 2.5%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:23; after immersion, stirring is started, and the temperature is raised to 75°C at a rate of 0.7°C / min, and the temperature is maintained for dyeing for 17 minutes. Stirring is stopped, and the temperature is continued to be raised to 95°C at a rate of 1.5°C / min, maintained for 8 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 3:0.15:0.2:20; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; In a further embodiment, the disperse dye solution may also be one or more of disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally.
[0029] This comparative example provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:14, and desizing is performed by stirring at 45°C for 35 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2.5 g / L of desizing agent DM-1322A, 1 g / L of degreasing agent NX-138A and 25 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid and shaken for 25 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:35, then the fabric treated with the first modifying liquid is placed in the second modifying liquid, the weight ratio of the fabric to the second modifying liquid is 1:35, heated at 60°C for 65 minutes, taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.5 mg of dopamine hydrochloride powder in 55 mL of Tris-HCl buffer with a concentration of 0.07 mol / L and a pH of 8.5, and adding 0.4 mL of H2O2 and 0.03 g of ammonium persulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1.1g of chitosan oligosaccharide and dissolving it in a citric acid aqueous solution with a mass concentration of 2.5%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:23; after immersion, stirring is started, and the temperature is raised to 75°C at a rate of 0.7°C / min, and the temperature is maintained for dyeing for 17 minutes. Stirring is stopped, and the temperature is continued to be raised to 95°C at a rate of 1.5°C / min, maintained for 8 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 3:0.15:0.2:20; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; In a further embodiment, the disperse dye solution may also be one or more of disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally.
[0030] This comparative example provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:14, and desizing is performed by stirring at 45°C for 35 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2.5 g / L of desizing agent DM-1322A, 1 g / L of degreasing agent NX-138A and 25 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid and shaken for 25 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:35, then the fabric treated with the first modifying liquid is placed in the second modifying liquid, the weight ratio of the fabric to the second modifying liquid is 1:35, heated at 60°C for 65 minutes, taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.5 mg of dopamine hydrochloride powder in 55 mL of Tris-HCl buffer with a concentration of 0.07 mol / L and a pH of 8.5, and adding 0.4 mL of H2O2 and 0.03 g of ammonium persulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1.1g of chitosan and dissolving it in an acetic acid aqueous solution with a mass concentration of 2.5%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:23; after immersion, stirring is started, and the temperature is raised to 75°C at a rate of 0.7°C / min, and the temperature is maintained for dyeing for 17 minutes. Stirring is stopped, and the temperature is continued to be raised to 95°C at a rate of 1.5°C / min, maintained for 8 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 3:0.15:0.2:20; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; In a further embodiment, the disperse dye solution may also be one or more of disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally.
[0031] This comparative example provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:14, and desizing is performed by stirring at 45°C for 35 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2.5 g / L of desizing agent DM-1322A, 1 g / L of degreasing agent NX-138A and 25 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid and shaken for 25 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:35, then the fabric treated with the first modifying liquid is placed in the second modifying liquid, the weight ratio of the fabric to the second modifying liquid is 1:35, heated at 60°C for 65 minutes, taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.5 mg of dopamine hydrochloride powder in 55 mL of Tris-HCl buffer with a concentration of 0.07 mol / L and a pH of 8.5, and adding 0.4 mL of H2O2 and 0.03 g of ammonium persulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1.1g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 2.5%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:23; after immersion, stirring is started, and the temperature is raised to 95°C at a rate of 1°C / min, maintained for 25 minutes, and then naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 3:0.15:0.2:20; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; In a further embodiment, the disperse dye solution may also be one or more of disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally.
[0032] This comparative example provides a water-saving printing and dyeing method for fabrics, the steps comprising: (1) Pretreatment stage: The polyester fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:14, and desizing is performed by stirring at 45°C for 35 min. After the treatment, the fabric is rinsed with clean water to remove the residual pretreatment agent and air-dried naturally; The solution of the pretreatment agent includes 2.5 g / L of desizing agent DM-1322A, 1 g / L of degreasing agent NX-138A and 25 g / L of sodium hydroxide; (2) Modification stage: the pretreated polyester fabric is placed in the first modifying liquid and shaken for 25 minutes and then dried, the weight ratio of the fabric to the first modifying liquid is 1:35, then the fabric treated with the first modifying liquid is placed in the second modifying liquid, the weight ratio of the fabric to the second modifying liquid is 1:35, heated at 60°C for 65 minutes, taken out and naturally air-dried to obtain a modified polyester fabric; The preparation method of the first modified liquid includes: dissolving 0.5 mg of dopamine hydrochloride powder in 55 mL of Tris-HCl buffer with a concentration of 0.07 mol / L and a pH of 8.5, and adding 0.4 mL of H2O2 and 0.03 g of ammonium persulfate to obtain the modified liquid; The preparation method of the second modified liquid includes: taking 1.1g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 2.5%; (3) Dyeing stage: The modified fabric is immersed in the dye solution for dyeing, and the weight ratio of the modified fabric to the dye solution is 1:23; after immersion, stirring is started, and the temperature is raised to 75°C at a rate of 0.7°C / min, and the temperature is maintained for dyeing for 25 minutes, and stirring is stopped, and then the temperature is naturally cooled to room temperature; The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of 3:0.15:0.2:20; the disperse dye is disperse violet HFRL, the acidity regulator is glacial acetic acid, and the leveling agent is leveling agent 9801; In a further embodiment, the disperse dye solution may also be one or more of disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 15 minutes at room temperature, and then air dry naturally.
[0033] Test example: The fabrics dried in the above-mentioned Examples 1-4 and Comparative Examples 1-9 were subjected to color fastness tests: the test method for color fastness to rubbing was based on ISO 105-X12, the test method for color fastness to washing was based on ISO105C03, and the test method for color fastness to sunlight was based on ISO 105B02; the test was performed 3 times, and the average value was taken. The test results are shown in Table 1; Table 1
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.
Claims
1. A water-saving printing and dyeing method for fabrics, characterized in that the steps include: (1) Pretreatment stage: The fabric is immersed in a solution containing a pretreatment agent, with the weight ratio of the fabric to the solution being 1:(12-16), and desizing is performed by stirring at 40-50°C for 30-40 minutes. After the treatment is completed, the fabric is rinsed with clean water to remove the residual pretreatment agent and naturally air-dried; (2) Modification stage: the pretreated polyester fabric is placed in the first modification liquid and shaken for 20-30 minutes and then dried. Subsequently, the fabric treated with the first modification liquid is placed in the second modification liquid and heated at 50-70°C for 60-70 minutes. After being taken out, it is naturally air-dried to obtain a modified polyester fabric. (3) Dyeing stage: soaking the modified fabric in dye solution for dyeing, the weight ratio of the modified fabric to the dye solution is 1: (20-26); (4) Washing stage: Immerse the dyed fabric in deionized water, stir or gently scrub for 10-20 minutes at room temperature, and then air dry naturally.
2. The water-saving printing and dyeing method for fabric according to claim 1, characterized in that: The solution of the pretreatment agent includes 2-3 g / L of a desizing agent, 0.8-1.2 g / L of a degreasing agent and 20-30 g / L of sodium hydroxide.
3. The water-saving printing and dyeing method of fabric according to claim 1, characterized in that: The preparation method of the first modified liquid comprises: dissolving dopamine hydrochloride powder in a Tris-HCl buffer solution with a concentration of 0.05-0.1 mol / L and a pH of 8.5, and then adding H2O2 and ammonium persulfate to obtain the modified liquid.
4. The water-saving printing and dyeing method for fabric according to claim 3, characterized in that: The dosage ratio of the dopamine hydrochloride powder, Tris-HCl buffer, H2O2 and ammonium persulfate is (0.4-0.6) mg: (50-60) mL: (0.2-0.6) mL: (0.02-0.04) g.
5. The water-saving printing and dyeing method for fabric according to claim 1, characterized in that: The preparation method of the second modified liquid includes: taking 1-1.2g of chitosan and dissolving it in a citric acid aqueous solution with a mass concentration of 2-3%.
6. The water-saving printing and dyeing method of fabric according to claim 1, characterized in that: In the step (2), the weight ratio of the fabric to the first modifying liquid is 1:(30-40), and the weight ratio of the fabric to the second modifying liquid is 1:(30-40).
7. The water-saving printing and dyeing method of fabric according to claim 1, characterized in that: The dyeing step in step (3) comprises: starting stirring after soaking, heating to 70-80°C at a rate of 0.5-1°C / min, maintaining this temperature for dyeing for 15-20 minutes, stopping stirring, continuing to heat to 90-100°C at a rate of 1-2°C / min, maintaining for 6-10 minutes, and then naturally cooling to room temperature.
8. The water-saving printing and dyeing method for fabric according to claim 1, characterized in that: The dye liquor comprises disperse dye, acidity regulator, leveling agent and deionized water in a weight ratio of (2-4): (0.1-0.2): (0.15-0.25): (18-22).
9. A water-saving printing and dyeing method for fabric according to claim 8, characterized in that: The disperse dye comprises one or more of disperse violet HFRL, disperse violet 26, disperse dark blue S-3BG, disperse dye fluorescent yellow 10GN, disperse blue 56, and disperse brilliant blue E-4R; the acidity regulator is glacial acetic acid; and the leveling agent is leveling agent 9801.
10. The water-saving printing and dyeing method of fabric according to claim 1, characterized in that: The fabric is polyester.