Dyeing method for improving stereoscopic impression of cashmere fabric

Abstract

The invention relates to a dyeing method for improving the stereoscopic impression of a cashmere fabric, and relates to the technical field of textile dyeing, and the dyeing method comprises the following steps: S1, controlling the temperature of a dye liquor at 80-90 DEG C, completely immersing the cashmere fabric into the dye liquor, dyeing for 50-60 minutes, taking out the cashmere fabric every 10-15 minutes during dyeing, and oxidizing the cashmere fabric in air for 3-5 minutes; s2, after dyeing is completed, water washing treatment is conducted, then the cashmere fabric is heated and shaped, the shaping temperature is 100-110 DEG C, and the shaping time is 5-8 min; s3, controlling the temperature of the dye liquor at 70-75 DEG C, completely immersing the shaped cashmere fabric into the dye liquor, dyeing for 20-30 minutes, taking out the cashmere fabric every 8-10 minutes during dyeing, and oxidizing the cashmere fabric in air for 3-5 minutes; s4, after dyeing is completed, water washing treatment is conducted, and then the cashmere fabric is heated and shaped. The cashmere fabric is treated through multiple times of dyeing and multiple times of heat setting, dye liquor molecules can permeate into fibers, and the fabric is high in stereoscopic impression, excellent in glossiness, high in dyeing adhesive force and good in firmness after being dyed with dye liquor.

Description

Technical Field

[0001] The invention belongs to the technical field of textile dyeing, and in particular relates to a dyeing method for improving the three-dimensional effect of cashmere fabric. Background Art

[0002] Cashmere fabrics are popular for their softness, warmth, and lightness. Dyeing is the key to giving cashmere fabrics rich colors and patterns. Cashmere fibers are mainly composed of protein, with a scale layer on the surface, which has a certain ability to adsorb and fix dyes. During the dyeing process, dye molecules enter the cashmere fiber through diffusion and penetration, forming chemical bonds or physical adsorption with fiber molecules to achieve dyeing. Cashmere is known for its softness, lightness, and warmth, so the dyeing process needs to be particularly careful to ensure that the color of the final product is uniform and does not damage its texture.

[0003] However, the existing cashmere fabric dyeing methods often find it difficult to form rich color layers and three-dimensional effects on cashmere fabrics. The existing dyeing methods easily lead to uneven colors, making it difficult to achieve gradient or multi-layered effects, which affects the aesthetics of the final product. Some complex dyeing techniques, such as tie-dyeing or layer-by-layer dyeing, often require a high level of technology and experience, which increases production costs and process difficulty. Dye molecules are difficult to fully penetrate into the fibers, causing cashmere fabrics to easily fade or fade during washing or use, affecting the long-term use of the fabric. Cashmere fabrics themselves are known for their softness and smoothness, but fabrics dyed using existing cashmere fabric dyeing methods may have their fiber structure damaged during the dyeing process due to chemical treatment, high temperature and other factors, thereby affecting their softness.

[0004] To this end, we provide a dyeing method for improving the three-dimensional effect of cashmere fabric to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a dyeing method for improving the three-dimensional effect of cashmere fabric in view of the problems of the background technology.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A dyeing method for improving the three-dimensional effect of cashmere fabric comprises the following steps:

[0008] S1. Control the temperature of the dye solution at 80-90°C, completely immerse the cashmere fabric in the dye solution, and dye for 50-60 minutes. During the dyeing period, take out the cashmere fabric and oxidize it in the air for 3-5 minutes every 10-15 minutes;

[0009] S2. After dyeing, the cashmere fabric is washed and then heated to set the fabric. The setting temperature is 100-110°C and the setting time is 5-8 minutes.

[0010] S3, controlling the temperature of the dye solution at 70-75°C, completely immersing the shaped cashmere fabric in the dye solution, and dyeing for 20-30 minutes. During the dyeing period, the cashmere fabric is taken out and oxidized in the air for 3-5 minutes every 8-10 minutes;

[0011] S4. After dyeing, the cashmere fabric is washed and then heated to set the fabric at a setting temperature of 110-120°C for 4-6 minutes.

[0012] S5, grinding the shaped cashmere fabric, and after grinding, washing and drying to obtain the final cashmere fabric product;

[0013] The raw materials for preparing the dye solution include, by weight, 10-12 parts of metal complex, 5-8 parts of mineral powder, 8-10 parts of mung bean powder, 3-5 parts of seaweed powder, 3-5 parts of mint leaf powder, 2-3 parts of gum arabic, 7-9 parts of colorant and 60-70 parts of deionized water.

[0014] As a further optimization scheme of the present invention, the metal complex is obtained by treating tea polyphenols and aluminum oxide particles with a particle size range of 10-50 nm with itaconic acid.

[0015] As a further optimization scheme of the present invention, the mass ratio of the aluminum oxide particles, tea polyphenols and itaconic acid is 1:0.4-0.5:0.2-0.3.

[0016] As a further optimization scheme of the present invention, the preparation steps of the metal complex are: dispersing tea polyphenols in 8-10 times the mass of deionized water, adding itaconic acid after mixing evenly, adding alumina particles after mixing evenly, applying ultrasound with a frequency of 20-40KHz and a time of 5-8min after mixing evenly, then keeping stirring for 1-1.5h, then standing for 1-1.2h, and then filtering to remove undissolved particles, and spray drying the filtrate to obtain the metal complex.

[0017] As a further optimization scheme of the present invention, the mineral powder is obtained by treating attapulgite particles with a particle size range of 10-100 nm with ferulic acid.

[0018] As a further optimization scheme of the present invention, the preparation steps of the mineral powder are: dispersing ferulic acid in a 95% volume fraction ethanol solution at 50-60°C to prepare a ferulic acid solution with a concentration of 5 mmol / L, dispersing attapulgite particles in 5-7 times the mass of the ferulic acid solution, mixing evenly, applying ultrasound with a frequency of 15-20 KHz and a time of 20-30 min, and after the reaction is completed, washing and filtering to remove unreacted ferulic acid, and spray drying the filtrate to obtain the mineral powder.

[0019] As a further optimization scheme of the present invention, the preparation steps of the dye solution are: adding the metal complex, mineral powder, mung bean powder, seaweed powder, mint leaf powder and gum arabic powder into a stirring device in proportion and mixing evenly to obtain a dry powder mixture, adding the colorant into deionized water and mixing evenly to obtain a mixed liquid, and then adding the dry powder mixture into the mixed liquid, mixing evenly, applying ultrasound with a frequency of 15-20KHz and a time of 15-20min, then standing for 1-1.2h, filtering to remove undissolved particles, and obtaining a dye solution.

[0020] As a further optimization scheme of the present invention, the step of polishing treatment in S5 is: fixing the cashmere fabric on the polishing equipment, starting the ultrasonic polishing head of the polishing equipment, controlling the ultrasonic polishing head to run at a uniform speed in the same direction of the fabric, the ultrasonic frequency is 20-40kHz, and the polishing time is 5-7min.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention adopts multiple dyeing and multiple heat setting treatments for cashmere fabrics, which can make the dye molecules penetrate into the fibers, greatly improving the washing color fastness of the fabric. Multiple dyeing can deepen the color level change, thereby giving the fabric a three-dimensional effect. Washing and polishing treatments can make the dye molecules penetrate into the fibers more evenly, forming a natural color level, producing soft color changes, and enhancing the touch and visual three-dimensional effect of the fabric.

[0023] 2. After dyeing with dye solution, the fabric of the present invention has a strong three-dimensional sense, excellent glossiness, strong dyeing adhesion, good fastness, and at the same time, the softness does not decrease significantly. Under the premise of ensuring the softness of the cashmere fabric, the three-dimensional sense of the fabric is significantly improved.

[0024] 3. The dyeing liquid of the present invention can give cashmere fabrics unique luster and texture, enhance the three-dimensional effect, and enhance the color fastness of the dyeing liquid by using the metal complex treated with tea polyphenols and itaconic acid and the mineral powder treated with ferulic acid, thereby ensuring that the cashmere fabrics still maintain bright colors and three-dimensional effect after repeated washing. DETAILED DESCRIPTION

[0025] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] 1. Main instruments and materials

[0027] The instruments used in the present invention, such as ultrasonic equipment, mechanical stirring equipment, and spray drying equipment, are conventional instruments known to those skilled in the art unless otherwise specified, and the reagents and other materials used are commercially available products unless otherwise specified.

[0028] Among them, alumina particles were purchased from Hengxin New Material Technology Shijiazhuang Co., Ltd. and crushed to the required particle size; tea polyphenols were purchased from Jiangsu Jufeng Chemical Technology Co., Ltd.; itaconic acid was purchased from Shandong Shangwei Chemical Import and Export Co., Ltd.; attapulgite particles were purchased from Lingshou County Ruifeng Mineral Products Co., Ltd. and crushed to the required particle size; ferulic acid was purchased from Hubei Mingtuo Biotechnology Co., Ltd.; mung bean powder is the starch obtained by water grinding the seeds of the legume plant mung bean; seaweed powder is the powder obtained by washing, drying and crushing spirulina; mint leaf powder is the powder obtained by washing, drying and crushing fresh mint leaves.

[0029] 2. Implementation of the experiment

[0030] Example 1

[0031] Cashmere fabrics are dyed according to the following dyeing method:

[0032] S1. Control the temperature of the dye solution at 85°C, immerse the cashmere fabric completely in the dye solution, and dye for 55 minutes. During the dyeing process, take out the cashmere fabric and oxidize it in the air for 4 minutes every 12 minutes.

[0033] When preparing the dye solution, according to the following weight parts, 11 parts of metal complex, 6 parts of mineral powder, 9 parts of mung bean powder, 4 parts of seaweed powder, 4 parts of mint leaf powder, 2.5 parts of gum arabic, 8 parts of colorant and 65 parts of deionized water, the metal complex, mineral powder, mung bean powder, seaweed powder, mint leaf powder and gum arabic powder are added to a stirring device in proportion and mixed evenly to obtain a dry powder mixture, the colorant is added to the deionized water and mixed evenly to obtain a mixed solution, and then the dry powder mixture is added to the mixed solution, and after mixing evenly, an ultrasonic wave with a frequency of 18KHz and a time of 18min is applied, and then it is allowed to stand for 1.1h, and undissolved particles are removed by filtration to obtain a dye solution;

[0034] The metal complex is obtained by treating tea polyphenols and alumina particles with a particle size range of 20-40 nm with itaconic acid, and the mass ratio of alumina particles, tea polyphenols and itaconic acid is 1:0.45:0.25. Specifically, tea polyphenols are dispersed in 9 times the mass of deionized water, mixed evenly, and then itaconic acid is added, and then alumina particles are added after mixing evenly, and then ultrasonic waves with a frequency of 30KHz and a time of 6 minutes are applied after mixing evenly, and then stirring is maintained for 1.2 hours, and then standing for 1.1 hours, and then undissolved particles are removed by filtration, and the filtrate is spray-dried to obtain the metal complex;

[0035] The mineral powder is obtained by treating attapulgite particles with a particle size range of 30-60 nm with ferulic acid. Specifically, ferulic acid is dispersed in a 95% ethanol solution at 55° C. to prepare a ferulic acid solution with a concentration of 5 mmol / L. The attapulgite particles are dispersed in the ferulic acid solution with a mass of 6 times, and ultrasonic waves with a frequency of 18 KHz and a time of 25 minutes are applied after mixing evenly. After the reaction is completed, unreacted ferulic acid is removed by washing and filtering, and the filtrate is spray-dried to obtain the mineral powder.

[0036] S2. After dyeing, the cashmere fabric is washed and then heated to set at a setting temperature of 105°C for 6 minutes.

[0037] S3, controlling the temperature of the dye solution at 72°C, completely immersing the shaped cashmere fabric in the dye solution, and dyeing for 25 minutes. During the dyeing period, the cashmere fabric is taken out and oxidized in the air for 4 minutes every 9 minutes;

[0038] S4, after dyeing is completed, the cashmere fabric is washed and then heated to set the setting temperature of 115°C for 5 minutes;

[0039] S5. Polish the shaped cashmere fabric, fix the cashmere fabric on the polishing equipment, start the ultrasonic polishing head of the polishing equipment, control the ultrasonic polishing head to run at a constant speed along the same direction of the fabric, the ultrasonic frequency is 30kHz, and the polishing time is 6 minutes. After the polishing is completed, wash and dry to obtain the final cashmere fabric product.

[0040] Example 2

[0041] Cashmere fabrics are dyed according to the following dyeing method:

[0042] S1. Control the temperature of the dye solution at 80°C, completely immerse the cashmere fabric in the dye solution, and dye for 50 minutes. During the dyeing process, take out the cashmere fabric and oxidize it in the air for 3 minutes every 10 minutes.

[0043] When preparing the dye solution, according to the following weight parts, 10 parts of metal complex, 5 parts of mineral powder, 8 parts of mung bean powder, 3 parts of seaweed powder, 3 parts of mint leaf powder, 2 parts of gum arabic, 7 parts of colorant and 60 parts of deionized water, the metal complex, mineral powder, mung bean powder, seaweed powder, mint leaf powder and gum arabic powder are added to a stirring device in proportion and mixed evenly to obtain a dry powder mixture, the colorant is added to the deionized water and mixed evenly to obtain a mixed solution, and then the dry powder mixture is added to the mixed solution, and after mixing evenly, an ultrasonic wave with a frequency of 15KHz and a time of 15min is applied, and then it is allowed to stand for 1h, and undissolved particles are removed by filtration to obtain a dye solution;

[0044] The metal complex is obtained by treating tea polyphenols and alumina particles with a particle size range of 10-20 nm with itaconic acid, and the mass ratio of alumina particles, tea polyphenols and itaconic acid is 1:0.4:0.2. Specifically, tea polyphenols are dispersed in 8 times the mass of deionized water, mixed evenly, and then itaconic acid is added, and then alumina particles are added after mixing evenly, and then ultrasonic waves with a frequency of 20KHz and a time of 5 minutes are applied after mixing evenly, and then stirring is maintained for 1 hour, and then standing for 1 hour, and then undissolved particles are removed by filtration, and the filtrate is spray-dried to obtain the metal complex;

[0045] The mineral powder is obtained by treating attapulgite particles with a particle size range of 10-30 nm with ferulic acid. Specifically, ferulic acid is dispersed in a 50° C. ethanol solution with a volume fraction of 95% to prepare a ferulic acid solution with a concentration of 5 mmol / L, and the attapulgite particles are dispersed in the ferulic acid solution with a mass of 5 times, and ultrasonic waves with a frequency of 15 KHz and a time of 20 minutes are applied after mixing evenly. After the reaction is completed, unreacted ferulic acid is removed by washing and filtering, and the filtrate is spray-dried to obtain the mineral powder;

[0046] S2. After dyeing, the cashmere fabric is washed and then heated to set the setting temperature of 100°C for 5 minutes.

[0047] S3, controlling the temperature of the dye solution at 70°C, completely immersing the shaped cashmere fabric in the dye solution, and dyeing for 20 minutes. During the dyeing period, the cashmere fabric is taken out and oxidized in the air for 3 minutes every 8 minutes;

[0048] S4, after dyeing, wash the cashmere fabric with water, and then heat and set the fabric at a setting temperature of 110°C for 4 minutes;

[0049] S5. Polish the shaped cashmere fabric, fix the cashmere fabric on the polishing equipment, start the ultrasonic polishing head of the polishing equipment, control the ultrasonic polishing head to run at a uniform speed along the same direction of the fabric, the ultrasonic frequency is 20kHz, and the polishing time is 5 minutes. After the polishing is completed, wash and dry to obtain the final cashmere fabric product.

[0050] Example 3

[0051] Cashmere fabrics are dyed according to the following dyeing method:

[0052] S1. Control the temperature of the dye solution at 90°C, completely immerse the cashmere fabric in the dye solution, and dye for 60 minutes. During the dyeing process, take out the cashmere fabric and oxidize it in the air for 5 minutes every 15 minutes.

[0053] When preparing the dye solution, according to the following weight parts, 12 parts of metal complex, 8 parts of mineral powder, 10 parts of mung bean powder, 5 parts of seaweed powder, 5 parts of mint leaf powder, 3 parts of gum arabic, 9 parts of colorant and 70 parts of deionized water, the metal complex, mineral powder, mung bean powder, seaweed powder, mint leaf powder and gum arabic powder are added to a stirring device in proportion and mixed evenly to obtain a dry powder mixture, the colorant is added to the deionized water and mixed evenly to obtain a mixed solution, and then the dry powder mixture is added to the mixed solution, and after mixing evenly, an ultrasonic wave with a frequency of 20KHz and a time of 20min is applied, and then it is allowed to stand for 1.2h, and undissolved particles are removed by filtration to obtain a dye solution;

[0054] The metal complex is obtained by treating tea polyphenols and alumina particles with a particle size range of 40-50 nm with itaconic acid, and the mass ratio of alumina particles, tea polyphenols and itaconic acid is 1:0.5:0.3. Specifically, tea polyphenols are dispersed in 10 times the mass of deionized water, mixed evenly, and then itaconic acid is added, and then alumina particles are added after mixing evenly, and then ultrasonic waves with a frequency of 40KHz and a time of 8 minutes are applied after mixing evenly, and then stirring is maintained for 1.5 hours, and then standing for 1.2 hours, and then undissolved particles are removed by filtration, and the filtrate is spray-dried to obtain the metal complex;

[0055] The mineral powder is obtained by treating attapulgite particles with a particle size range of 60-100 nm with ferulic acid. Specifically, ferulic acid is dispersed in a 60° C. ethanol solution with a volume fraction of 95% to prepare a ferulic acid solution with a concentration of 5 mmol / L. The attapulgite particles are dispersed in the ferulic acid solution with a mass of 7 times, and ultrasonic waves with a frequency of 20 KHz and a time of 30 minutes are applied after mixing evenly. After the reaction is completed, unreacted ferulic acid is removed by washing and filtering, and the filtrate is spray-dried to obtain the mineral powder.

[0056] S2. After dyeing, the cashmere fabric is washed and then heated to set the fabric at a setting temperature of 110°C for 8 minutes.

[0057] S3, controlling the temperature of the dye solution at 75°C, completely immersing the shaped cashmere fabric in the dye solution, and dyeing for 30 minutes. During the dyeing period, the cashmere fabric is taken out and oxidized in the air for 5 minutes every 10 minutes;

[0058] S4, after dyeing is completed, the cashmere fabric is washed and then heated to set the setting temperature of 120°C for 6 minutes;

[0059] S5. Polish the shaped cashmere fabric, fix the cashmere fabric on the polishing equipment, start the ultrasonic polishing head of the polishing equipment, control the ultrasonic polishing head to run at a constant speed along the same direction of the fabric, the ultrasonic frequency is 40kHz, and the polishing time is 7 minutes. After the polishing is completed, wash and dry to obtain the final cashmere fabric product.

[0060] Comparative Example 1

[0061] Cashmere fabrics are dyed according to the following dyeing method:

[0062] S1. Control the temperature of the dye solution at 85°C, immerse the cashmere fabric completely in the dye solution, and dye for 55 minutes. During the dyeing process, take out the cashmere fabric and oxidize it in the air for 4 minutes every 12 minutes.

[0063] When preparing the dye solution, according to the following weight parts, 11 parts of metal complex, 6 parts of mineral powder, 9 parts of mung bean powder, 4 parts of seaweed powder, 4 parts of mint leaf powder, 2.5 parts of gum arabic, 8 parts of colorant and 65 parts of deionized water, the metal complex, mineral powder, mung bean powder, seaweed powder, mint leaf powder and gum arabic powder are added to a stirring device in proportion and mixed evenly to obtain a dry powder mixture, the colorant is added to the deionized water and mixed evenly to obtain a mixed solution, and then the dry powder mixture is added to the mixed solution, and after mixing evenly, an ultrasonic wave with a frequency of 18KHz and a time of 18min is applied, and then it is allowed to stand for 1.1h, and undissolved particles are removed by filtration to obtain a dye solution;

[0064] The metal complex is obtained by treating tea polyphenols and alumina particles with a particle size range of 10-50 nm with itaconic acid, and the mass ratio of alumina particles, tea polyphenols and itaconic acid is 1:0.45:0.25. Specifically, tea polyphenols are dispersed in 9 times the mass of deionized water, mixed evenly, and then itaconic acid is added, and then alumina particles are added after mixing evenly, and then ultrasonic waves with a frequency of 30KHz and a time of 6 minutes are applied after mixing evenly, and then stirring is maintained for 1.2 hours, and then standing for 1.1 hours, and then undissolved particles are removed by filtration, and the filtrate is spray-dried to obtain the metal complex;

[0065] The mineral powder is obtained by treating attapulgite particles with a particle size range of 10-100 nm with ferulic acid. Specifically, ferulic acid is dispersed in a 95% ethanol solution at 55° C. to prepare a ferulic acid solution with a concentration of 5 mmol / L. The attapulgite particles are dispersed in the ferulic acid solution with a mass of 6 times, and ultrasonic waves with a frequency of 18 KHz and a time of 25 minutes are applied after mixing evenly. After the reaction is completed, unreacted ferulic acid is removed by washing and filtering, and the filtrate is spray-dried to obtain the mineral powder.

[0066] S2. After dyeing, the cashmere fabric is washed and then heated to set at a setting temperature of 105°C for 6 minutes.

[0067] S3. Polish the shaped cashmere fabric, fix the cashmere fabric on the polishing equipment, start the ultrasonic polishing head of the polishing equipment, control the ultrasonic polishing head to run at a uniform speed along the same direction of the fabric, the ultrasonic frequency is 30kHz, and the polishing time is 6 minutes. After the polishing is completed, wash and dry to obtain the final cashmere fabric product.

[0068] Comparative Example 2

[0069] Cashmere fabrics are dyed according to the following dyeing method:

[0070] S1. Control the temperature of the dye solution at 85°C, immerse the cashmere fabric completely in the dye solution, and dye for 55 minutes. During the dyeing process, take out the cashmere fabric and oxidize it in the air for 4 minutes every 12 minutes.

[0071] When preparing the dye solution, according to the following weight parts, 11 parts of metal complex, 6 parts of mineral powder, 9 parts of mung bean powder, 4 parts of seaweed powder, 4 parts of mint leaf powder, 2.5 parts of gum arabic, 8 parts of colorant and 65 parts of deionized water, the metal complex, mineral powder, mung bean powder, seaweed powder, mint leaf powder and gum arabic powder are added to a stirring device in proportion and mixed evenly to obtain a dry powder mixture, the colorant is added to the deionized water and mixed evenly to obtain a mixed solution, and then the dry powder mixture is added to the mixed solution, and after mixing evenly, an ultrasonic wave with a frequency of 18KHz and a time of 18min is applied, and then it is allowed to stand for 1.1h, and undissolved particles are removed by filtration to obtain a dye solution;

[0072] The metal complex is obtained by treating tea polyphenols and alumina particles with a particle size range of 10-50 nm with itaconic acid, and the mass ratio of alumina particles, tea polyphenols and itaconic acid is 1:0.45:0.25. Specifically, tea polyphenols are dispersed in 9 times the mass of deionized water, mixed evenly, and then itaconic acid is added, and then alumina particles are added after mixing evenly, and then ultrasonic waves with a frequency of 30KHz and a time of 6 minutes are applied after mixing evenly, and then stirring is maintained for 1.2 hours, and then standing for 1.1 hours, and then undissolved particles are removed by filtration, and the filtrate is spray-dried to obtain the metal complex;

[0073] The mineral powder is obtained by treating attapulgite particles with a particle size range of 10-100 nm with ferulic acid. Specifically, ferulic acid is dispersed in a 95% ethanol solution at 55° C. to prepare a ferulic acid solution with a concentration of 5 mmol / L. The attapulgite particles are dispersed in the ferulic acid solution with a mass of 6 times, and ultrasonic waves with a frequency of 18 KHz and a time of 25 minutes are applied after mixing evenly. After the reaction is completed, unreacted ferulic acid is removed by washing and filtering, and the filtrate is spray-dried to obtain the mineral powder.

[0074] S2. After dyeing, the cashmere fabric is washed and then heated to set at a setting temperature of 105°C for 6 minutes.

[0075] Based on Example 1, dye solutions of different components were selected to prepare raw materials, as shown in Table 1. The following comparative examples were set, and the cashmere fabric was dyed according to the dyeing method of Example 1.

[0076] Table 1 Raw material components for dye solution preparation

[0077]

[0078]

[0079] Note: “-” means no addition; ordinary metal complex refers to alumina particles that have not been treated with tea polyphenols and itaconic acid; ordinary mineral powder refers to attapulgite particles that have not been treated with ferulic acid.

[0080] Take several groups of cashmere fabrics of the same mass and make test samples of 20cm×20cm×0.5mm. Set up control samples: cashmere fabrics dyed with dye solution prepared by directly dissolving the colorant in deionized water. Perform the following performance tests on the samples:

[0081] (1) Appearance test:

[0082] The three-dimensional sense of appearance can be evaluated by the grading method. Under good lighting conditions, the surface texture and gloss of the cashmere fabric are observed, and the gloss is used for quantitative analysis. The results of visual and instrumental detection are combined to give a final three-dimensional sense grade score. After taking the average value of multiple groups of experiments, the test results are statistically obtained in Table 2 below.

[0083] (2) Softness test:

[0084] The sample was placed on a bending tester and the force required when a certain angle (such as 90 degrees) was applied was measured to evaluate the softness. The higher the bending force value, the worse the softness of the sample. After taking the average value of multiple groups of experiments, the test results were statistically obtained in Table 2 below.

[0085] (3) Washing color fastness test:

[0086] The samples were washed together with standard detergents in a washing machine under specified conditions for multiple times (e.g., 50 times). The color changes of the samples after washing were compared with those of the original samples, and the washing color fastness grade was evaluated according to the standard. The average values ​​of multiple groups of experiments were taken and the test results were statistically obtained in Table 2 below.

[0087] Table 2 Performance parameters of samples

[0088]

[0089]

[0090] Note: The three-dimensional effect grade is expressed in grades 1-5, as shown in Table 3 below. The washing color fastness grade is expressed in grades 1-5, as shown in Table 4 below:

[0091] Table 3 Stereoscopic level

[0092] level Appearance 1 Blurred texture, no three-dimensional effect, rough surface, lack of gloss 2 The texture is not obvious, the three-dimensional effect is slight, and the glossiness is low 3 Visible texture, a certain three-dimensional sense, moderate glossiness 4 Clear texture, obvious three-dimensional effect, good gloss 5 The texture is very clear, the three-dimensional sense is strong, and the glossiness is excellent

[0093] Table 4 Washing color fastness grades

[0094]

[0095]

[0096] 3. Results Analysis

[0097] 1. In combination with the above table, the comparison of the test data of Example 1, Comparative Example 1 and Comparative Example 2 shows that the cashmere fabric is treated with multiple dyeing and multiple heat setting, which can make the dye molecules penetrate into the fiber, greatly improving the washing color fastness of the fabric. Multiple dyeing can deepen the color level change, thereby giving the fabric a three-dimensional effect. By washing and slightly ultrasonic polishing the cashmere fabric, tiny reflective spots will be generated on the surface of the fabric, which can enhance the gloss of the fabric under light. The scattering effect of light makes the fabric present different colors at different angles, further enhancing the visual three-dimensional effect.

[0098] 2. Combined with the above table, by comparing the test data of the fabrics of Example 1, Example 2, and Example 3 with other fabrics, it can be seen that the three-dimensional sense grade and washing color fastness grade of the fabrics are significantly better than those of other fabrics, indicating that the fabrics have a strong three-dimensional sense after being dyed with dye solution, excellent gloss, strong adhesion of the dyeing, good fastness, and the bending force of the fabric is not much different from that of the control sample, indicating that the softness of the fabric does not decrease significantly after being dyed with dye solution, and the three-dimensional sense of the fabric is significantly improved while ensuring the softness of the cashmere fabric.

[0099] 3. In combination with the above table, the comparison of the test data of the fabric in comparative example 3 and the fabric in embodiment 1 shows that since no metal complex is added to the dye liquor of the fabric in comparative example 3, its three-dimensional sense and washing color fastness are greatly reduced. The comparison of the test data of the fabric in comparative example 4 and the fabric in embodiment 1 shows that since ordinary metal complex is added to the dye liquor of the fabric in comparative example 4, its three-dimensional sense and washing color fastness are not significantly reduced, but the softness is deteriorated. This shows that the metal complex obtained by treating with tea polyphenols and itaconic acid can have a strong promoting effect on the dye liquor. This may be due to the complexation of the metal complex with the organic compounds in the plant components to form a more stable dye liquor, which is not easy to fade and prolongs the durability of dyeing. The metal complex is more easily adsorbed on the fabric fiber, thereby improving the adhesion of the dye liquor and making the dyeing effect more firm. In addition, the metal complex generally has a strong hydrophilicity, which can make the fabric surface smoother and produce a more three-dimensional and softer effect.

[0100] 4. In combination with the above table, the test data of the fabric in comparative example 5 and the fabric in embodiment 1 are compared, and it can be seen that since no mineral powder is added to the dye liquor of the fabric in comparative example 5, its three-dimensional sense and washing color fastness are greatly reduced, but the softness is not significantly reduced. The test data of the fabric in comparative example 6 and the fabric in embodiment 1 are compared, and it can be seen that since ordinary mineral powder is added to the dye liquor of the fabric in comparative example 6, its three-dimensional sense and washing color fastness are not significantly reduced, but the softness is deteriorated. This shows that the mineral powder treated with ferulic acid can have a strong promoting effect on the dye liquor. This may be because the mineral powder has a certain reflectivity, which can enhance the gloss of the fabric to a certain extent. The modified attapulgite has better adsorption, dispersibility and stability, improves the uniform distribution and fixing effect of the dye liquor, thereby indirectly enhancing the gloss of the fabric. Ferulic acid also has permeability and the ability to bind to fibers, further enhancing the modification effect.

[0101] The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A dyeing method for improving the three-dimensional effect of cashmere fabric, characterized in that: The following steps are involved: S1. Control the temperature of the dye solution at 80-90°C, completely immerse the cashmere fabric in the dye solution, and dye for 50-60 minutes. During the dyeing period, take out the cashmere fabric and oxidize it in the air for 3-5 minutes every 10-15 minutes; S2. After dyeing, the cashmere fabric is washed and then heated to set the fabric. The setting temperature is 100-110°C and the setting time is 5-8 minutes. S3, controlling the temperature of the dye solution at 70-75°C, completely immersing the shaped cashmere fabric in the dye solution, and dyeing for 20-30 minutes. During the dyeing period, the cashmere fabric is taken out and oxidized in the air for 3-5 minutes every 8-10 minutes; S4. After dyeing, the cashmere fabric is washed and then heated to set the fabric at a setting temperature of 110-120°C for 4-6 minutes. S5, grinding the shaped cashmere fabric, and after grinding, washing and drying to obtain the final cashmere fabric product; The raw materials for preparing the dye solution include, by weight, 10-12 parts of metal complex, 5-8 parts of mineral powder, 8-10 parts of mung bean powder, 3-5 parts of seaweed powder, 3-5 parts of mint leaf powder, 2-3 parts of gum arabic, 7-9 parts of colorant and 60-70 parts of deionized water.

2. A dyeing method for improving the three-dimensional effect of cashmere fabric according to claim 1, characterized in that: The metal complex is obtained by treating tea polyphenols and aluminum oxide particles with a particle size range of 10-50 nm with itaconic acid.

3. A dyeing method for improving the three-dimensional effect of cashmere fabric according to claim 2, characterized in that: The mass ratio of the aluminum oxide particles, tea polyphenols and itaconic acid is 1:0.4-0.5:0.2-0.

3.

4. A dyeing method for improving the three-dimensional effect of cashmere fabric according to claim 3, characterized in that: The preparation steps of the metal complex are as follows: dispersing tea polyphenols in 8-10 times the mass of deionized water, adding itaconic acid after mixing evenly, adding alumina particles after mixing evenly, applying ultrasound with a frequency of 20-40KHz and a time of 5-8min after mixing evenly, then keeping stirring for 1-1.5h, then standing for 1-1.2h, then filtering to remove undissolved particles, and spray drying the filtrate to obtain the metal complex.

5. The dyeing method for improving the three-dimensional effect of cashmere fabric according to claim 1, characterized in that: The mineral powder is obtained by treating attapulgite particles with a particle size range of 10-100 nm with ferulic acid.

6. A dyeing method for improving the three-dimensional effect of cashmere fabric according to claim 5, characterized in that: The preparation steps of the mineral powder are as follows: dispersing ferulic acid in an ethanol solution with a volume fraction of 95% at 50-60° C. to prepare a ferulic acid solution with a concentration of 5 mmol / L, dispersing attapulgite particles in the ferulic acid solution with a mass of 5-7 times, mixing evenly, applying ultrasound with a frequency of 15-20 KHz and a time of 20-30 min, washing and filtering to remove unreacted ferulic acid after the reaction is completed, and spray drying the filtrate to obtain the mineral powder.

7. The dyeing method for improving the three-dimensional effect of cashmere fabric according to claim 1, characterized in that: The preparation steps of the dye solution are: adding a metal complex, mineral powder, mung bean powder, seaweed powder, mint leaf powder and gum arabic powder into a stirring device in proportion and mixing them evenly to obtain a dry powder mixture; adding a colorant into deionized water and mixing them evenly to obtain a mixed liquid; adding the dry powder mixture into the mixed liquid, mixing evenly, applying ultrasound with a frequency of 15-20KHz and a time of 15-20min, then standing for 1-1.2h, filtering to remove undissolved particles, and obtaining a dye solution.

8. The dyeing method for improving the three-dimensional effect of cashmere fabric according to claim 1, characterized in that: The step of polishing treatment in S5 is: fixing the cashmere fabric on the polishing equipment, starting the ultrasonic polishing head of the polishing equipment, controlling the ultrasonic polishing head to run at a uniform speed along the same direction of the fabric, the ultrasonic frequency is 20-40kHz, and the polishing time is 5-7min.

Images