One-bath dyeing method for wool-polyester-acrylic fiber blended fabric

Abstract

The invention discloses a one-bath dyeing method for a wool-polyester-acrylic fiber blended fabric, and belongs to the technical field of textile dyeing. According to the invention, dopamine or dopamine-like and derivatives thereof and octadecyl trimethyl ammonium chloride are used for synergistically modifying the wool / polyester / nitrile blended fabric, and the modified blended fabric is further used for dyeing with a specific cationic reactive dye and a disperse dye. The method provided by the invention solves the problems of dispersion and agglomeration of disperse dyes and reactive dyes, does not easily generate dyeing defects, and also improves the dyeing uptake and color fastness of the wool / polyester / nitrile blended fabric. The dye utilization rate is high, the technological process is easy to control, and the obtained fabric is pure in cloth cover color, bright in color, high in color saturation and high in color fastness.

Description

Technical Field

[0001] The invention relates to a one-bath dyeing method for a wool-polyester-acrylic blended fabric, belonging to the technical field of textile dyeing. Background Art

[0002] Dyeing refers to the process of dyeing the fiber from the dye liquor and forming a uniform, strong and bright color on the fiber. The chemical composition of various fibers is different, and the applicable dyes are also different. Wool is mainly dyed with acid dyes; polyester is mainly dyed with dispersed materials, and the commonly used dyeing methods are high temperature method, carrier method and hot melt method; acrylic is mainly dyed with cationic dyes or disperse dyes. Therefore, it can be seen that the dyeing properties of polyester, wool fiber and acrylic fiber are very different. Disperse dyes and acid dyes are easy to condense and precipitate in the same bath, and dyeing wool, polyester and acrylic blended fabrics has problems such as easy color flower.

[0003] Due to the differences in fiber properties, wool, polyester, and acrylic blended fabrics have complicated pre-treatment and dyeing and finishing processes. The processing process is complicated, energy consumption is high, and the cost is high. Different types of dyes may also affect each other's color and fastness, making dyeing difficult and technically demanding, making it difficult to achieve good dyeing results. Wool fiber itself has excellent performance. By blending with other fibers, it can reduce costs and give diversified styles, which is favored by the market. Although the traditional two-bath dyeing of wool blended fabrics has good color homogeneity, it has a lengthy process, high energy consumption, and large wastewater discharge. The one-bath dyeing can shorten the process flow, save dyeing time, reduce energy consumption, reduce wastewater discharge, and cause little damage to the fiber. It can greatly improve production efficiency, reduce costs, and better meet the market's requirements of "small batch, multiple varieties, fast changes, and fast delivery". However, due to the different physical and chemical properties of different fibers in the blended fabric, the dyeing performance is different. The one-bath dyeing has certain difficulties in homochromy. In order to meet production requirements, adjustments must be made in dyes, auxiliaries, and processes. Summary of the invention

[0004] In order to solve the technical problems in the prior art of one-step one-bath dyeing of wool / polyester / acrylic blended fabrics, disperse dyes and acid dyes are prone to coagulation and precipitation in the same bath, dyed wool / polyester / acrylic blends have color spots, and the color fastness of the fabric is difficult to control, resulting in poor user experience, the present invention provides a wool / polyester / acrylic blended fabric and a production method thereof.

[0005] The present invention is achieved through the following technical solutions: The first object of the present invention is to provide a wool-polyester-acrylic blended fabric one-bath dyeing method, comprising the following steps: (1) pretreating a wool-polyester-nitrile blended fabric with ammonia and / or salt to obtain a wool-polyester-nitrile blended fabric pretreated with ammonia and / or salt; (2) modifying the wool-polyester-nitrile blended fabric pretreated in step (1) by using dopamine or dopamine-like derivatives and their derivatives and anionic surfactant octadecyltrimethylammonium chloride to obtain a wool-polyester-nitrile blended fabric modified with dopamine or dopamine-like derivatives and their derivatives and octadecyltrimethylammonium chloride; (3) The wool-polyester-nitrile blended fabric modified in step (2) is immersed in a mixed dispersion of a cationic active dye, a leveling agent octadecyl dimethyl benzyl ammonium chloride and a disperse dye, and then dried, reduction-cleaned, washed and dried to obtain a dyed wool-polyester-nitrile blended fabric.

[0006] In one embodiment of the present invention, the ammonia and / or salt pretreatment in step (1) is to immerse the wool-polyester-acrylic blended fabric in a solution containing 0.25-6.5 g / L ammonia water and / or 2-80 g / L salt, immerse at a constant temperature of 40-60°C for 30-120 min, then take out, wash with water, perform reduction cleaning, wash with water, and dry, wherein the bath ratio is 1:60-100.

[0007] In one embodiment of the present invention, the salt in step (1) is a mixture of one or more of sodium chloride, calcium chloride and sodium sulfate.

[0008] In one embodiment of the present invention, the dopamine or dopamine-like derivatives and their derivatives described in step (2) are one or more of gallic acid, dopamine hydrochloride, polydopamine-like (DATA), N-3,4-dihydroxyphenylethyl acrylamide (DAA), and MOA.

[0009] In one embodiment of the present invention, the modification described in step (2) is to immerse the pretreated wool-polyester-nitrile blended fabric in a mixed solution containing dopamine or dopamine-like and its derivatives, octadecyltrimethylammonium chloride and a buffer solution, the pH of the solution is 8-10, and then wash with water and dry the mixture; wherein the concentration of dopamine or dopamine-like and its derivatives in the mixed solution is 1.5-3.5 mg / mL; the concentration of the buffer solution is 0.5-4.5 M; and the concentration ratio of dopamine or dopamine-like and its derivatives to octadecyltrimethylammonium chloride is 1:2-3.

[0010] In one embodiment of the present invention, the modification in step (2) is performed by immersing at 25-45°C with magnetic stirring at 50-120 rpm for 16-54 hours.

[0011] In one embodiment of the present invention, the reactive dye in step (3) is a cationic reactive dye, specifically, dye H-1 represented by the following structural formula (1), dye H-2 represented by the following structural formula (2), reactive red X-3B or cationic yellow X-5GL; Among them, the structural formula of dye H-1 is: (1) The structural formula of dye H-2 is: (2) Wherein, the concentration of the active dye is 2.5-10.5mM.

[0012] In one embodiment of the present invention, the disperse dye is one or more of CI Disperse Red 60, CI Disperse Red 73, CI Disperse Blue 183, CI Disperse Red 153, CI Disperse Red 86, and CI Disperse Blue 60, and the concentration of the disperse dye is 3.5-8.5 mM.

[0013] In one embodiment of the present invention, the immersion temperature in step (3) is 85-115° C. and the time is 20-120 min.

[0014] In one embodiment of the present invention, the pH of the mixed dispersion in step (3) is 4-6.

[0015] In one embodiment of the present invention, the reduction cleaning step in step (3) is as follows: placing the dyed fabric at 35-45°C, heating to 40-80°C at a rate of 1-2°C / min and keeping the temperature for 5-30min, while performing ultrasonic treatment at an ultrasonic power of 60-120W, followed by washing, dehydration and drying, wherein the cleaning solution for reduction cleaning comprises 2.5-6.5g / L of acidic reduction cleaning agent DM-8931, 1.5-8.5g / L of soda ash, and a bath ratio of 1:40-60.

[0016] Beneficial effects of the present invention: The invention adopts dopamine or dopamine-like and its derivatives and octadecyltrimethylammonium chloride to synergistically modify wool / polyester / nitrile blended fabric, and further adopts the modified blended fabric to dye with specific cationic active dyes and disperse dyes.

[0017] On the one hand, the modifier dopamine or dopamine-like and its derivatives are reasonably matched with octadecyltrimethylammonium chloride. When the modification is performed, the modifier can be uniformly adhered to the surface of the wool / polyester / nitrile blended fabric by interacting with the groups on the wool fiber. Furthermore, the cationic active dye designed for the wool / polyester / nitrile blended fabric of the present invention, when matched with the disperse dye, the positive charge groups in the active dye molecular chain and the negative charge in the octadecyltrimethylammonium chloride form an electrostatic adsorption bond, and at the same time, the groups in the active dye and the disperse dye molecular chains are cross-linked with the modifier, so that the dye can also be uniformly dispersed on the surface of the wool / polyester / nitrile blended fabric, thereby solving the problem of dispersion and agglomeration of the disperse dye and the active dye, and is not easy to produce color flowers.

[0018] On the other hand, the method of the present invention not only solves the dispersion and agglomeration problem of disperse dyes and reactive dyes, but also, due to the force between the modifier and the fiber, and the interaction between the modifier and the dye, the layers are closely attached to the wool / polyester / nitrile blended fabric, the adhesion between the interfaces is enhanced, the reactive dye and the disperse dye are uniformly and closely attached to the wool / polyester / nitrile blended fabric, and the dyeing uptake and color fastness of the wool / polyester / nitrile blended fabric are improved. The dye utilization rate of the present invention is high, the process is easy to control, and the obtained fabric surface color is pure, bright in color, high in color saturation, and high in color fastness. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is the process curve of one-bath dyeing of wool-polyester-acrylic blended fabric. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific examples. These implementation cases are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the claims attached to the application.

[0022] Test method: Color fastness Color fastness to washing: Determined in accordance with ISO 105 C10-2006 “Textiles - Tests for colour fastness - Part C10: Colour fastness to washing with soap or soda water”.

[0023] Colour fastness to rubbing: Determined in accordance with ISO 105 X12-2001 “Textiles - Tests for colour fastness - Part X12: Colour fastness to rubbing”.

[0024] Color fastness to sunlight: Determined in accordance with ISO 105 B02-2013 "Textiles - Tests for color fastness - Part B02: Fastness to artificial colored light: Xenon arc fading lamp".

[0025] Dyeing rate The absorbance value of the dye solution at the maximum absorption wavelength before and after dyeing was tested by UV-visible spectrophotometer. The dye uptake rate E was calculated as follows:

[0026] In the formula: A0 is the absorbance of the original dye solution before dyeing; A1 is the absorbance of the residual dye solution after dyeing.

[0027] The structural formula of dye H-1 is: , preparation steps: (1) Dissolve 2-chloroethylamine hydrochloride (2 g / L) and pyridine (3.5 g / L) in deionized water, stir and react at 60°C for 4.5 h, then reflux at 98°C for 3 h, then acidify the water layer with concentrated hydrochloric acid to a pH of 2, and evaporate it under vacuum to form a slurry, add it dropwise to isopropanol to solidify the product, filter, wash with acetone, and dry to obtain pyridinium quaternary ammonium salt; (2) Slurry cyanuric chloride (2.5 g / L) at 5°C for 1 h and stir evenly to obtain a cyanuric chloride aqueous solution; add pyridinium quaternary ammonium salt (4.5 g / L) dropwise into the cyanuric chloride aqueous solution, react at 5°C, pH = 4 for 4.5 h to obtain a condensation product solution; add N, N-diethylaminoaniline (3.2 g / L) into a mixed solution of 30 ml water and 20 ml hydrochloric acid (1.5 mol / L), stir until completely dissolved, slowly add the dissolved solution dropwise into the condensation product solution, continue to react at 40°C, pH = 5 for 6 h to obtain a dicondensation product solution; (3) Add m-aminoacetanilide (4 g / L) into a three-necked flask, and then add 250 mL of deionized water, dimethyl sulfate (DMS) (3.5 g / L) and NaHCO 3 (2.5 g / L), stirred until completely dissolved, and then reacted at 55°C for 18 hours. After the reaction, cooled to room temperature, concentrated sulfuric acid (4.5 g / L) was added at 98°C for acidic hydrolysis for 2 hours to obtain 3-amino-N,N,N-trimethylbenzyl ammonium sulfate.

[0028] (4) Take 45 mL (2.5 g / L) of 3-amino-N, N, N-trimethylbenzyl ammonium sulfate, adjust the pH to neutral with 8.5 g / L of sodium hydroxide solution, add 15 mL (1.5 g / L) of hydrochloric acid and stir evenly. Cool to 0°C, add 10 mL (3.5 g / L) of 30% sodium nitrite aqueous solution, and diazotize for 1 h at pH = 6. Add an appropriate amount of aminosulfonic acid to destroy excess nitrous acid to obtain the diazonium salt. Then add the dicondensation product solution dropwise to the above diazonium salt, continue the reaction at 5°C and pH = 6 for 5 h, then use 30% w / v potassium chloride solution to salt it out, and finally freeze-dry to obtain H-1 reactive dye.

[0029] The structural formula of dye H-2 is: , preparation steps: (1) Dissolve 2-chloroethylamine hydrochloride (1.5 g / L) and pyridine (2.5 g / L) in deionized water, stir and react at 60°C for 6 h, then reflux at 95°C for 2.5 h, then acidify the water layer with concentrated hydrochloric acid to a pH of 2, and evaporate it under vacuum to form a slurry. Add it dropwise into isopropanol to solidify the product, filter it, wash it with acetone, and dry it to obtain pyridine quaternary ammonium salt; (2) Slurry cyanuric chloride (3.5 g / L) at 5°C for 1 h and stir evenly to obtain a cyanuric chloride aqueous solution; add pyridinium quaternary ammonium salt (2.5 g / L) dropwise into the cyanuric chloride aqueous solution, react at 5°C, pH = 5 for 5 h to obtain a condensation product solution; add 2-methoxy-5-methylaniline (4.5 g / L) into a mixed solution of 60 ml water and 30 ml hydrochloric acid (2.5 mol / L), stir until completely dissolved, slowly add the dissolved solution dropwise into the condensation product solution, continue to react at 50°C, pH = 6 for 8 h to obtain a second condensation product solution; (3) Add m-aminoacetanilide (2 g / L) into a three-necked flask, and then add 150 mL of deionized water, dimethyl sulfate (DMS) (6.5 g / L) and NaHCO 3 (3.5 g / L), stirred until completely dissolved, and then reacted at 55°C for 18 hours. After the reaction, cooled to room temperature, concentrated sulfuric acid (3.5 g / L) was added at 95°C for acidic hydrolysis for 3 hours to obtain 3-amino-N,N,N-trimethylbenzyl ammonium sulfate.

[0030] (4) Take 35 mL (6.5 g / L) of 3-amino-N,N,N-trimethylbenzyl ammonium sulfate, adjust the pH to neutral with 9.5 g / L sodium hydroxide solution, add 25 mL (2.5 g / L) of hydrochloric acid and stir evenly. Cool to 0°C, add 15 mL (4.5 g / L) of 30% sodium nitrite aqueous solution, and diazotize for 2 h at pH = 5. Add an appropriate amount of aminosulfonic acid to destroy excess nitrous acid to obtain the diazonium salt. Then add the dicondensation product solution dropwise to the above diazonium salt, continue the reaction at 0°C and pH = 4 for 6 h, then use 25% w / v potassium chloride solution to salt it out, and finally freeze-dry to obtain H-2 reactive dye.

[0031] The technical solution of the present invention is described in detail below in conjunction with specific embodiments. In the following embodiments, unless otherwise specified, the reagents, materials and equipment used can be purchased from commercial sources, or prepared by conventional methods, or are commonly used in the industry.

[0032] Embodiment 1: A wool / polyester / acrylic blended fabric one-bath dyeing and a preparation method thereof, comprising the following steps: (1) Immersing wool / polyester / acrylic blended fabric in a solution containing ammonia (3 g / L) and calcium chloride (15 g / L) at 50°C for 60 min, then taking it out, washing it, drying it, and weighing it for later use, wherein the bath ratio is 1:50, to obtain ammonia / salt pretreated wool / polyester / acrylic blended fabric; (2) The wool / polyester / acrylic blended fabric obtained after ammonia / salt pretreatment in step (1) was immersed in a mixed solution containing dopamine hydrochloride (2.5 mg / mL), octadecyltrimethylammonium chloride (6.25 mg / mL) and tris buffer (1 M), with the pH value of the solution being 8.5; and then magnetically stirred at 80 rpm for 24 h at room temperature (25°C); (3) The wool / polyester / acrylic blended fabric modified with polydopamine and octadecyltrimethylammonium chloride obtained in step (2) is immersed in a mixed dispersion of H-1 (3.5 mM), CI Disperse Red 60 (4.5 mM) and octadecyldimethylbenzylammonium chloride (0.25 mM), the solution pH being 4.5, the immersion temperature being 95°C, the immersion time being 60 min, followed by drying at 60°C for 30 min, reduction washing, and repeating the immersion-drying operation 3 times; thereby obtaining a dyed wool / polyester / acrylic blended fabric.

[0033] The reduction cleaning is as follows: put the dyed fabric at 40°C, heat it to 80°C at 1.5°C / min and keep it warm for 30 minutes (ultrasonic power is 100 W, ultrasonic reduction cleaning), then wash, dehydrate and dry, wherein the acidic reduction cleaning agent DM-89313.5g / L, soda ash 2.5 g / L, and the bath ratio is 1:50.

[0034] The test results of dyed wool / polyester / acrylic blended fabrics are: dyeing rate is 96.8%, color fastness to rubbing is level 4 (dry), level 4-5 (wet), color fastness to soaping: color change level 4-5, wool staining level 4, cotton staining level 4-5, color fastness to perspiration: color change level 4-5, wool staining level 4-5, cotton staining level 4, with fewer color spots.

[0035] Embodiment 2: (1) Immersing wool / polyester / acrylic blended fabric in a solution containing ammonia (3.5 g / L) and calcium chloride (10 g / L) at 50°C for 60 min, then taking it out, washing it with water, drying it, and weighing it for later use, wherein the bath ratio is 1:50, to obtain ammonia / salt pretreated wool / polyester / acrylic blended fabric; (2) Immersing the wool / polyester / acrylic blended fabric pretreated with ammonia / salt obtained in step (1) in a mixed solution containing dopamine hydrochloride (2.5 mg / mL), octadecyltrimethylammonium chloride (6.25 mg / mL) and tris buffer (1.6 M), the pH of the solution being 8.5; and then magnetically stirring at 80 rpm for 24 h at room temperature (25°C); (3) The wool / polyester / acrylic blended fabric modified with polydopamine and octadecyltrimethylammonium chloride obtained in step (2) is immersed in a mixed dispersion of H-2 (4 mM), CI Disperse Red 60 (3.5 mM) and octadecyldimethylbenzylammonium chloride (0.3 mM), the solution pH being 5, the immersion temperature being 100°C, the immersion time being 60 min, followed by drying at 60°C for 30 min, reduction washing, and repeating the immersion-drying operation 3 times; thereby obtaining a dyed wool / polyester / acrylic blended fabric.

[0036] The reduction cleaning is as follows: put the dyed fabric at 40°C, heat it to 80°C at 1.5°C / min and keep it warm for 30 minutes (ultrasonic power is 100 W, ultrasonic reduction cleaning), then wash, dehydrate and dry, wherein the acidic reduction cleaning agent DM-89314.5g / L, soda ash 3.5 g / L, and the bath ratio is 1:50.

[0037] The test results of dyed wool / polyester / acrylic blended fabrics are: dyeing rate is 95.8%, color fastness to rubbing is 4-5 (dry), 4 (wet), color fastness to soaping: color change level 4, wool staining level 4-5, cotton staining level 4, color fastness to perspiration: color change level 4, wool staining level 4-5, cotton staining level 4, and there are obviously fewer color spots.

[0038] Embodiment 3: (1) Immersing wool / polyester / acrylic blended fabric in a solution containing ammonia (3.5 g / L) and calcium chloride (10 g / L) at 50°C for 60 min, then taking it out, washing it with water, drying it, and weighing it for later use, wherein the bath ratio is 1:50, to obtain ammonia / salt pretreated wool / polyester / acrylic blended fabric; (2) immersing the wool / polyester / acrylic blended fabric after ammonia / salt pretreatment obtained in step (1) in a mixed solution containing dopamine hydrochloride (2.5 mg / mL), octadecyltrimethylammonium chloride (6.25 mg / mL) and tris buffer (1.6 M), the solution pH being 8.5; and then magnetically stirring at 80 rpm at room temperature 25°C for 24 h; (3) The wool / polyester / acrylic blended fabric modified with polydopamine and octadecyltrimethylammonium chloride obtained in step (2) is immersed in a mixed dispersion of cationic red X-GRL (3.5 mM), CI disperse red 60 (4.5 mM) and octadecyldimethylbenzyl ammonium chloride (0.25 mM), the solution pH is 5, the immersion temperature is 100°C, the immersion time is 60 min, followed by drying at 60°C for 30 min, reduction washing, and repeating the immersion-drying operation 3 times; to obtain a dyed wool / polyester / acrylic blended fabric.

[0039] The reduction cleaning is as follows: put the dyed fabric at 40°C, heat it to 80°C at 1.5°C / min and keep it warm for 30 minutes (ultrasonic power is 100 W, ultrasonic reduction cleaning), then wash, dehydrate and dry, wherein the acidic reduction cleaning agent DM-89314.5g / L, soda ash 3.5 g / L, and the bath ratio is 1:50.

[0040] The test results of dyed wool / polyester / acrylic blended fabrics are: dye uptake is 89%, color fastness to rubbing is 3.5 (dry), 3 (wet), color fastness to soap washing: color change 3, wool staining 3, cotton staining 3, color fastness to perspiration: color change 3, wool staining 2, cotton staining 3. There are many color spots.

[0041] Comparative Example 1: (1) Immersing wool / polyester / acrylic blended fabric in a solution containing ammonia (3.5 g / L) and calcium chloride (10 g / L) at 50°C for 60 min, then taking it out, washing it with water, drying it, and weighing it for later use, wherein the bath ratio is 1:50, to obtain ammonia / salt pretreated wool / polyester / acrylic blended fabric; (2) immersing the wool / polyester / acrylic blended fabric after ammonia / salt pretreatment obtained in step (1) in a mixed solution containing dopamine hydrochloride (2.5 mg / mL) and tris buffer (1.6 M), the solution pH being 8.5; and then magnetically stirring at 80 rpm at room temperature 25°C for 24 hours; (3) The polydopamine-modified wool / polyester / acrylic blended fabric obtained in step (2) is immersed in a mixed dispersion of H-1 (3.5 mM), CI Disperse Red 60 (4.5 mM) and octadecyl dimethyl benzyl ammonium chloride (0.25 mM), the solution pH is 5, the immersion temperature is 100°C, the immersion time is 60 min, followed by drying at 60°C for 30 min, reduction washing, and repeating the immersion-drying operation 3 times; to obtain a dyed wool / polyester / acrylic blended fabric.

[0042] The reduction cleaning is as follows: put the dyed fabric at 40°C, heat it to 80°C at 1.5°C / min and keep it warm for 30 minutes (ultrasonic power is 100 W, ultrasonic reduction cleaning), then wash, dehydrate and dry, wherein the acidic reduction cleaning agent DM-89314.5g / L, soda ash 3.5 g / L, and the bath ratio is 1:50.

[0043] The test results of dyed wool / polyester / acrylic blended fabrics are: dyeing rate is 90%, color fastness to rubbing: level 3 (dry), level 3 (wet), color fastness to soaping: color change level 3, wool staining level 4, cotton staining level 2, color fastness to perspiration: color change level 2, wool staining level 3, cotton staining level 3, with more color spots.

[0044] Comparative Example 2: (1) Immersing wool / polyester / acrylic blended fabric in a solution containing ammonia (3.5 g / L) and calcium chloride (10 g / L) at 50°C for 60 min, then taking it out, washing it with water, drying it, and weighing it for later use, wherein the bath ratio is 1:50, to obtain ammonia / salt pretreated wool / polyester / acrylic blended fabric; (2) immersing the wool / polyester / acrylic blended fabric after ammonia / salt pretreatment obtained in step (1) in a solution of octadecyltrimethylammonium chloride (6.25 mg / mL) with a pH of 8.5; and then stirring the mixture with a magnetic stirrer at 80 rpm for 24 h at room temperature (25°C); (3) The wool / polyester / acrylic blended fabric modified with octadecyltrimethylammonium chloride obtained in step (2) is immersed in a mixed dispersion of H-1 (3.5 mM), CI Disperse Red 60 (4.5 mM) and octadecyldimethylbenzylammonium chloride (0.25 mM), wherein the pH of the solution is 5, the immersion temperature is 100°C, the immersion time is 60 min, and then dried at 60°C for 30 min, reduction-washed, and the immersion-drying operation is repeated 3 times to obtain a dyed wool / polyester / acrylic blended fabric.

[0045] The reduction cleaning is as follows: put the dyed fabric at 40°C, heat it to 80°C at 1.5°C / min and keep it warm for 30 minutes (ultrasonic power is 100 W, ultrasonic reduction cleaning), then wash, dehydrate and dry, wherein the acidic reduction cleaning agent DM-89314.5g / L, soda ash 3.5 g / L, and the bath ratio is 1:50.

[0046] The test results of dyed wool / polyester / acrylic blended fabrics are: dyeing rate is 89%, color fastness to rubbing is level 3 (dry), level 3 (wet), color fastness to soaping: color change level 2, wool staining level 4, cotton staining level 2, color fastness to perspiration: color change level 2, wool staining level 3, cotton staining level 3, with more color spots.

[0047] Comparative Example 3: (1) Immersing wool / polyester / acrylic blended fabric in a solution containing ammonia (3 g / L) and calcium chloride (15 g / L) at 50°C for 60 min, then taking it out, washing it, drying it, and weighing it for later use, wherein the bath ratio is 1:50, to obtain ammonia / salt pretreated wool / polyester / acrylic blended fabric; (2) The wool / polyester / acrylic blended fabric pretreated with ammonia / salt obtained in step (1) was immersed in a mixed solution containing dopamine hydrochloride (2.5 mg / mL), octadecyltrimethylammonium chloride (10 mg / mL) and tris buffer (1 M), with the pH value of the solution being 8.5; and then magnetically stirred at 80 rpm for 24 h at room temperature (25°C); (3) The wool / polyester / acrylic blended fabric modified with polydopamine and octadecyltrimethylammonium chloride obtained in step (2) is immersed in a mixed dispersion of H-1 (3.5 mM), CI Disperse Red 60 (4.5 mM) and octadecyldimethylbenzylammonium chloride (0.25 mM), the solution pH being 4.5, the immersion temperature being 95°C, the immersion time being 60 min, followed by drying at 60°C for 30 min, reduction washing, and repeating the immersion-drying operation 3 times; thereby obtaining a dyed wool / polyester / acrylic blended fabric.

[0048] The reduction cleaning is as follows: put the dyed fabric at 40°C, heat it to 80°C at 1.5°C / min and keep it warm for 30 minutes (ultrasonic power is 100 W, ultrasonic reduction cleaning), then wash, dehydrate and dry, wherein the acidic reduction cleaning agent DM-89313.5g / L, soda ash 2.5 g / L, and the bath ratio is 1:50.

[0049] The test results of dyed wool / polyester / acrylic blended fabrics are: dyeing rate is 86%, color fastness to rubbing: level 3 (dry), level 2 (wet), color fastness to soaping: color change level 3, wool staining level 3, cotton staining level 3, color fastness to perspiration: color change level 3, wool staining level 2, cotton staining level 3, with more color spots.

[0050] The embodiments provided above are not intended to limit the scope of the present invention, and the steps described are not intended to limit the execution order thereof. Those skilled in the art may make obvious improvements to the present invention in combination with existing common knowledge, which also fall within the scope of protection defined by the claims of the present invention.

Claims

1. A one-bath dyeing method for wool-polyester-acrylic blended fabric, characterized in that: The steps include: (1) pretreating a wool-polyester-nitrile blended fabric with ammonia and / or salt to obtain a wool-polyester-nitrile blended fabric pretreated with ammonia and / or salt; (2) modifying the wool-polyester-nitrile blended fabric pretreated in step (1) by using dopamine or dopamine-like derivatives and their derivatives and anionic surfactant octadecyltrimethylammonium chloride to obtain a wool-polyester-nitrile blended fabric modified with dopamine or dopamine-like derivatives and their derivatives and octadecyltrimethylammonium chloride; (3) The wool-polyester-nitrile blended fabric modified in step (2) is immersed in a mixed dispersion of a cationic active dye, a leveling agent octadecyl dimethyl benzyl ammonium chloride and a disperse dye, and then dried, reduction-cleaned, washed and dried to obtain a dyed wool-polyester-nitrile blended fabric.

2. The one-bath dyeing method for wool-polyester-acrylic blended fabric according to claim 1, characterized in that: The ammonia and / or salt pretreatment in step (1) is to immerse the wool-polyester-acrylic blended fabric in a solution containing 0.25-6.5 g / L ammonia water and / or 2-80 g / L salt, immerse at a constant temperature of 40-60°C for 30-120 minutes, then take out, wash with water, perform reduction cleaning, wash with water, and dry, wherein the bath ratio is 1:60-100.

3. The one-bath dyeing method for wool-polyester-acrylic blended fabric according to any one of claims 1 or 2, characterized in that: The salt in step (1) is a mixture of one or more of sodium chloride, calcium chloride and sodium sulfate.

4. The one-bath dyeing method for wool-polyester-acrylic blended fabric according to claim 1, characterized in that: The dopamine or dopamine-like derivatives and their derivatives described in step (2) are one or more of gallic acid, dopamine hydrochloride, polydopamine-like derivatives, N-3,4-dihydroxyphenylethyl acrylamide, and MOA.

5. The one-bath dyeing method for wool-polyester-acrylic blended fabric according to claim 1, characterized in that: The modification described in step (2) is to immerse the pretreated wool-polyester-nitrile blended fabric in a mixed solution containing dopamine or dopamine-like and its derivatives, octadecyltrimethylammonium chloride and buffer solution, the pH value of the solution is 8-10, and then wash with water and dry the mixture; wherein the concentration of dopamine or dopamine-like and its derivatives in the mixed solution is 1.5-3.5 mg / mL; the concentration of the buffer solution is 0.5-4.5 M; and the concentration ratio of dopamine or dopamine-like and its derivatives to octadecyltrimethylammonium chloride is 1:2-3.

6. The one-bath dyeing method for wool-polyester-acrylic blended fabric according to any one of claims 1 or 5, characterized in that: The modification described in step (2) is performed by immersing at 25-45°C with magnetic stirring at 50-120 rpm for 16-54 hours.

7. The one-bath dyeing method for wool-polyester-acrylic blended fabric according to claim 1, characterized in that: The reactive dye in step (3) is a cationic reactive dye, specifically, dye H-1 represented by the following structural formula (1), dye H-2 represented by the following structural formula (2), reactive red X-3B or cationic yellow X-5GL; Among them, the structural formula of dye H-1 is: （1） The structural formula of dye H-2 is: （2） Wherein, the concentration of the active dye is 2.5-10.5mM.

8. The one-bath dyeing method for wool-polyester-acrylic blended fabric according to claim 1, characterized in that: The disperse dye is one or more of CI Disperse Red 60, CI Disperse Red 73, CI Disperse Blue 183, CI Disperse Red 153, CI Disperse Red 86, and CI Disperse Blue 60, and the concentration of the disperse dye is 3.5-8.5 mM.

9. The one-bath dyeing method for wool-polyester-acrylic blended fabric according to claim 1, characterized in that: The immersion temperature in step (3) is 85-115° C. and the immersion time is 20-120 min. The pH of the mixed dispersion in step (3) is 4-6.

10. The one-bath dyeing method for wool-polyester-acrylic blended fabric according to any one of claims 1 or 9, characterized in that: The reduction cleaning step in step (3) is as follows: placing the dyed fabric at 35-45°C, heating it to 40-80°C at a rate of 1-2°C / min and keeping it warm for 5-30min, while performing ultrasonic treatment at an ultrasonic power of 60-120W, then washing, dehydrating and drying, wherein the cleaning solution for reduction cleaning includes 2.5-6.5g / L acidic reduction cleaning agent DM-8931, 1.5-8.5g / L soda ash, and a bath ratio of 1:40-60.

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