Wool viscose blended yarn dyeing process

Abstract

The invention discloses a wool viscose blended yarn dyeing process, and relates to the technical field of textile fabric dyeing. The wool-viscose blended yarn is prepared from wool fibers and viscose fibers, and the wool-viscose blended yarn is wound into cheese. The wool viscose blended yarn dyeing process comprises a pretreatment process, a dyeing process and a soaping process. In the pretreatment process, a degreasing agent, a compound enzyme, a bleaching stabilizer, a pH buffering agent, a bleaching agent and a bleaching activating agent are adopted for treating the cheese; the compound enzyme comprises lipase, degradation protease and shrinkproof protease. According to the dyeing process, ultrasonic waves are used as assistance, and cheese is dyed with acid dye, reactive dye, electrolyte, a leveling agent, a pH sliding agent and a wool protective agent. An enzyme treatment method is used for pretreatment, shrink-proof treatment is carried out to inhibit directional movement of wool scales, and the risk of fiber entanglement under damp and hot mechanical force is eliminated. Ultrasonic assistance is adopted in the dyeing process, the ability of dye liquor penetrating through a yarn layer is improved, and the color consistency of yarn on the inner layer, the middle layer and the outer layer of the cheese is improved.

Description

Technical Field

[0001] The present application relates to the technical field of textile dyeing, and in particular to a dyeing process for wool-viscose blended yarn. Background Art

[0002] Blended yarns of wool and viscose are called wool-viscose blended yarns. The loose tubes of wool-viscose blended yarn wound onto bobbins are called cheese yarns. Cheese dyeing has become a mainstream dyeing process due to its efficiency and simplicity. However, some cheese dyeing processes have difficulty uniformly penetrating the yarn layers, resulting in poor color consistency across the inner, middle, and outer layers of the cheese, a high rate of rework, and a high risk of fiber damage. Summary of the Invention

[0003] In view of the fact that some relevant cheese yarn dyeing processes have the problem that the dye solution has difficulty in evenly penetrating the yarn layer, resulting in poor color consistency among the inner, middle and outer layers of the cheese, a high rework rate and a high risk of fiber damage, this application proposes an ultrasonic-assisted wool-viscose blended yarn dyeing process to improve this phenomenon.

[0004] A wool-viscose blended yarn dyeing process, wherein the wool-viscose blended yarn is prepared from wool fiber and viscose fiber, and the wool-viscose blended yarn is wound into cheese yarn; the wool-viscose blended yarn dyeing process includes a pretreatment process, a dyeing process and a soaping process.

[0005] The pre-treatment process uses a degreasing agent, a composite enzyme, a bleaching stabilizer, a pH buffer, a bleaching agent and a bleaching activator to treat the cheese yarn; the composite enzyme includes lipase, a degrading protease and an anti-shrinkage protease.

[0006] The dyeing process is assisted by ultrasound and uses acid dyes, reactive dyes, electrolytes, leveling agents, pH sliding agents and wool protective agents to dye the cheese yarn.

[0007] By adopting the above technical solution: the degreasing agent is combined with the compound enzyme to remove oil stains on the surface of the fabric; the lipase can decompose the fatty substances in the wool, remove the grease layer, and improve the hydrophilicity of the wool, laying the foundation for subsequent processing; the degrading protease removes some proteins, making the wool fiber softer and improving the feel of the fabric. It can also open the structure of the wool scale layer, making the dye more easily penetrated, thereby improving the dyeing effect; the anti-shrinkage protease can change the structure of the wool scale layer, reducing friction and entanglement between fibers, thereby preventing the wool from felting during the washing process and improving the softness and gloss of the wool fiber. The wool-viscose blended yarn is light yellow, and the bleaching agent oxidizes and removes the fiber pigment, making it white; the bleaching activator activates the bleaching agent and improves the bleaching efficiency; the pH buffer adjusts the pH, adjusts the activity of the compound enzyme, controls its decomposition effect, and adjusts the pH to a pH suitable for the bleaching agent to work; the bleaching stabilizer and the bleaching activator work together to control the activity of the bleaching agent. The wool-viscose blended yarn may be a 52S-60S wool-viscose blended yarn, the mass ratio of which is: 30-40% wool fiber, 60-70% viscose fiber; the mass ratio of lipase, degradation protease and shrinkage-proof protease may be (2-4): (2-4): (3-5), for example, 3:3:4.

[0008] Ultrasonic waves have three main functions in the dyeing system: 1. Dispersion, which disaggregates dyeing reagents, especially dye aggregates, and has a solubilizing effect, which is beneficial to dye penetration; 2. Degassing, which removes air from the fiber capillaries and inside the yarn; 3. Diffusion, which thins the diffusion boundary layer of the dye, promotes the diffusion of the dye to the fiber surface, increases the activity of the amorphous chain segments in the fiber, and improves the color consistency of the inner, middle and outer layers of the cheese yarn.

[0009] Acid dyes bind to wool amino groups through ionic bonds at pH ≤ 5, have a high dye uptake rate on wool, and have almost no adsorption on viscose. Reactive dyes form covalent bonds with viscose hydroxyl groups at pH = 6, have a high adsorption fixation rate on viscose, and only physically adsorb on wool. Electrolytes adjust the charge balance of the dye solution, reduce the charge repulsion between the fiber and the dye, make the dye adhere to the fiber surface faster, promote the adsorption of acid dyes on wool, and promote the dyeing of reactive dyes on viscose. Leveling agents slow the initial dyeing rate of wool by competing with dyes and improve the migration of viscose by reducing interfacial tension. pH sliding agents dynamically adjust the pH to match the optimal dyeing window of double fibers, avoiding strong acid damage to wool and insufficient dyeing of viscose. Wool protective agents form a hydrophobic film to reduce friction on the scales on the surface of wool fibers and inhibit the breakage of disulfide bonds in wool proteins at high temperatures (> 80°C), playing an anti-felting role.

[0010] A preferred solution of the wool-viscose blended yarn dyeing process is that the pre-treatment process includes: soaking the cheese yarn in water, adding a degreasing agent so that the concentration of the degreasing agent is 2-3 g / L, and maintaining it at 38-42°C for 4-6 minutes; then heating it to 50-55°C, adding the complex enzyme so that the concentration of the complex enzyme is 3-5 g / L, and maintaining it for 8-12 minutes; then adding the bleaching stabilizer and the pH buffer at the temperature of 50-55°C so that the concentration of the bleaching stabilizer is 1-1 .5g / L to make the pH reach 7.8-8.2, and maintain it for 35-40min; heat it to 80-85℃ and maintain it for 5-10min, then cool it and drain it; add water to soak the cheese yarn, heat it to 38-42℃, add the bleach activator and the bleaching agent to make the concentration of the bleach activator 1-2g / L, the concentration of the bleaching agent 5-8g / L, and the pH be 7.8-8.2, and maintain it for 4-6min; heat it to 60-65℃ and maintain it for 25-30min; drain it and wash it with water.

[0011] By adopting this technical solution, an enzymatic pretreatment method is used, which is more environmentally friendly than current non-enzymatic treatment methods. In addition to removing oils, dirt, and impurities from the wool blended yarn, a shrink-proof treatment is also required to inhibit the directional movement of wool scales, eliminate the risk of fiber entanglement under the mechanical forces of heat and moisture, and facilitate dyeing uniformity. This solution uses a degreaser and a complex enzyme for efficient pretreatment, balancing fiber protection and treatment efficiency. Because wool-viscose blended yarns have a light yellow color, they are bleached to achieve a certain whiteness for dyeing.

[0012] A preferred solution of the wool-viscose blended yarn dyeing process is that the degreasing agent is fatty amine polyoxyethylene ether; the bleaching stabilizer is organic phosphonate; the bleaching agent is hydrogen peroxide; and the bleaching activator is tetraacetylethylenediamine.

[0013] By adopting the above technical solution, fatty amine polyoxyethylene ether removes fiber grease; hydrogen peroxide is oxidized to remove fiber pigment; and the organic phosphonate can be ethylenediamine tetramethylenephosphonic acid, which cooperates with tetraacetylethylenediamine to control the decomposition rate of hydrogen peroxide.

[0014] It should be noted that the concentrations described herein refer to the concentrations of the respective reagents in the aqueous solution used to soak the cheese. For example, a degreaser concentration of 2-3 g / L indicates that after adding the degreaser to the water used to soak the cheese, the concentration in the aqueous solution is 2-3 g / L. For example, if the bleaching agent is hydrogen peroxide, the raw material may be a 30% hydrogen peroxide solution, and the bleaching agent concentration is 5-8 g / L, this indicates the concentration of hydrogen peroxide in the aqueous solution used to soak the cheese.

[0015] One preferred solution of the dyeing process of the wool-viscose blended yarn is that the dyeing process comprises: soaking the cheese in water, turning on the ultrasonic wave, adding a part of the electrolyte, a part of the leveling agent, the acid dye and the reactive dye, the mass ratio of the acid dye to the net weight of the cheese is 2-3%, the mass ratio of the reactive dye to the net weight of the cheese is 3-5%, the pH is 4-5, and the temperature is kept at 38-42°C for 4-6 min; heating to 50-55°C, adding another part of the electrolyte, another part of the leveling agent and the pH sliding agent, so that the total concentration of the electrolyte is 40-50 g / L, the total concentration of the leveling agent is 1-1.5 g / L, and the concentration of the pH sliding agent is 1-1.5 g / L, the pH is increased to 5.8-6.2, and the temperature is kept for 4-6 min; heating to 60-65°C for 20-25 min; heating to 70-75°C, adding the wool protective agent, the ratio of the wool protective agent to the net weight of the cheese is 0.5-1%, and the temperature is kept for 4-6 min; heating to 80-85°C for 25-30 min; draining and washing.

[0016] By adopting the above technical solution: (1) The leveling agent and the electrolyte are added in sections to avoid instant dyeing of wool. (2) Ultrasonic wave assistance in the 38-42°C pre-permeation stage: frequency 25-30 kHz, power 0.3-0.5 W / cm 2 , time length 5 min, acid dye pre-dyeing wool fibers. (3) After adding the pH sliding agent, the pH value is slowly increased to 5.8-6.2 at a speed of 0.2-0.4 / min, then the pH value is kept stable at 5.8-6.2, and reactive dye pre-dyes viscose fibers. (4) Ultrasonic wave assistance in the 60-65°C main dyeing stage: frequency 35-45 kHz, power 0.5-0.8 W / cm 2 , time length 20-25 min, acid dye deep-dyeing wool fibers. (5) Ultrasonic wave assistance in the 80-85°C leveling stage: frequency 50-60 kHz, power 0.8-1.0 W / cm 2 , time length 10-15 min, reactive dye deep-dyeing viscose fibers, and balancing the color of the double fibers. In this dyeing link, the wool-viscose blended yarn is dyed by the combination of reactive / acid dyes, the electrolyte and the leveling agent are added in sections, and the dyeing rate of wool fibers and viscose fibers is balanced by four-stage temperature rising and holding, so that the yarn color is uniform, and the color fastness is excellent.

[0017] One preferred solution of the dyeing process of the wool-viscose blended yarn is that the acid dye is acid red 88; the reactive dye is reactive red 198; and the leveling agent is alkyl phenol polyoxyethylene ether (10) sulfosuccinic acid monoester disodium.

[0018] By adopting the above technical solution, disodium alkylphenol polyoxyethylene ether (10) sulfosuccinate slows down the dyeing speed of acid red 88 on wool fibers and increases the dyeing speed of reactive red 198 on viscose fibers, so that the dyeing speeds of the two dyes are close to balance and the colors of the two fibers are consistent.

[0019] A preferred solution of the wool-viscose blended yarn dyeing process is that the soaping process uses a nonionic surfactant, a pH buffer, a compound soaping agent and a rare earth complexing agent to wash the cheese yarn; the compound soaping agent includes laccase and cutinase.

[0020] By adopting this technical solution, the soaping process utilizes an enzymatic treatment, which is more environmentally friendly than current non-enzymatic treatments. Laccase degrades unfixed active dyes, while cutinase degrades easily eluted dyes adsorbed by fiber surface proteins. Nonionic surfactants emulsify and hydrolyze dyes and oils, preventing backstaining. pH buffers maintain an optimal pH for laccase and cutinase activity. Rare earth chelating agents chelate heavy metal ions, preventing inactivation of laccase and cutinase.

[0021] A preferred solution of the wool-viscose blended yarn dyeing process is that the soaping process includes: soaking the cheese yarn in water, heating it to 38-42°C, adding the non-ionic surfactant and the pH buffer so that the concentration of the non-ionic surfactant is 1-1.5 g / L and the pH is 5.5-6, and maintaining it for 4-6 minutes; heating it to 49-51°C, adding the compound soaping agent so that the concentration of the compound soaping agent is 1-1.5 g / L, and maintaining it for 8-12 minutes; continuing to add the rare earth complexing agent at the temperature of 49-51°C so that the concentration of the rare earth complexing agent is 0.5-0.8 g / L, and maintaining it for 4-6 minutes; heating it to 54-56°C, ultrasonically assisting it for 8-12 minutes; draining the liquid, and washing with water.

[0022] By adopting the above technical solution, the floating color of wool-viscose blended yarn is mainly hydrolyzed reactive dyes and acid dyes. With the assistance of ultrasound, under the synergistic action of biological enzymes and surfactants, soaping removes the floating color with high efficiency, reducing the number of water washings after soaping and thus reducing water consumption. Only one cold water wash is performed, and the mass ratio of the net weight of the cheese yarn to the cold water can be 1:10. Compared with the non-enzymatic soaping method, the water consumption can be reduced by more than 30%. If a second cold water wash is performed, the cheese yarn will not produce floating color. The ultrasonic auxiliary frequency can be 35-40kHz, and the power can be 0.5-0.8W / cm 2 .

[0023] A preferred solution of the wool-viscose blended yarn dyeing process is that the nonionic surfactant is fatty alcohol polyoxyethylene ether; the compound soaping agent is composed of laccase and cutinase in a mass ratio of (6-8):(2-4); and the rare earth complexing agent is lanthanum citrate.

[0024] By employing this technical solution, fatty alcohol polyoxyethylene ether emulsifies and hydrolyzes dyes and oils, preventing backstaining. Lanthanum citrate chelates heavy metal ions, preventing the inactivation of laccase and cutinase. This combined soaping agent is highly effective in removing floating color.

[0025] In summary, the wool-viscose blended yarn dyeing process of the present application has the following beneficial effects: enzyme treatment is used in both the pre-treatment and soap washing stages, which is more environmentally friendly than traditional non-enzymatic processes. The ultrasonic frequency, power and duration are set for the pre-infiltration stage, the main dyeing stage and the leveling stage respectively, to improve the poor penetration of the inner and outer layers of the cheese yarn, and to improve the one-time pass rate and dyeing efficiency of the cheese yarn. In the dyeing stage, under the action of a pH sliding agent, the wool-viscose blended yarn is dyed with a combination of active / acid dyes. The dyeing rates of the wool fiber and viscose fiber are balanced by the segmented addition of electrolytes and leveling agents and the four-stage heating and heat preservation method. The yarn color is uniform and the color fastness is excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the refining and oil removal steps in the first half of the pretreatment process.

[0027] Figure 2 Schematic diagram of the bleaching step in the second half of the pretreatment process.

[0028] Figure 3 Schematic diagram of the dyeing process.

[0029] Figure 4 Schematic diagram of the soap washing process. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments are described clearly and completely below. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the following embodiments, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] The following examples and comparative examples used the same batch of cheese yarn raw materials, all of which were made by winding 60S wool-viscose blended yarn onto bobbins. The wool-viscose blended yarn composition ratio was: 35% wool fiber, 65% viscose fiber. The main parameters of the cheese yarn were: winding density 0.35±0.02g / cm 3 ; Net weight 1500±50g / piece; Chamfer angle 25°±2°.

[0032] Example 1 The invention discloses a wool-viscose blended yarn dyeing process, namely a cheese yarn dyeing process, which comprises a pre-treatment process, a dyeing process and a soaping process.

[0033] Pre-processing process: referenceFigure 1 , soak the cheese yarn in water, the mass ratio of the cheese yarn net weight to water is 1:15, add degreasing agent to make the degreasing agent concentration 2.5g / L, the pH of the soaking liquid is neutral, and keep it at 40℃ for 5min; then heat it to 52℃ at a heating rate of 1℃ / min, add complex enzyme to make the complex enzyme concentration 4g / L, and keep it for 10min; at this temperature of 52℃, then add bleaching stabilizer to make the bleaching stabilizer concentration 1.2g / L, gradually add pH buffer to make the pH slowly rise to 8 at a speed of 0.2 / min, keep the pH value stable at 8, and keep it for 37min; heat it to 82℃ at a heating rate of 2℃ / min and keep it for 7min, then cool and drain. Figure 2 , add water to soak the cheese yarn, the mass ratio of the net weight of the cheese yarn to water is 1:10, heat to 40℃, add bleach activator and bleaching agent, so that the concentration of the bleach activator is 1.5g / L, the concentration of the bleaching agent is 6g / L, the pH reaches 8, and maintain for 5 minutes; heat to 62℃ at a heating rate of 1℃ / min and maintain for 27 minutes; cool to below 40℃, drain and wash with water.

[0034] In the above pretreatment process: the degreasing agent is fatty amine polyoxyethylene ether; the complex enzyme is lipase, degradation protease and anti-shrinkage protease in a mass ratio of 3:3:4, the degradation protease is subtilisin, and the anti-shrinkage protease is glutamine transaminase; the bleaching stabilizer is ethylenediaminetetramethylenephosphonic acid; the pH buffer is acetic acid and sodium acetate buffer system; the bleaching activator is tetraacetylethylenediamine; and the bleaching agent is hydrogen peroxide.

[0035] Dyeing process: reference Figure 3 , soak the cheese in water, the mass ratio of cheese net weight to water is 1:10, turn on the ultrasonic wave, the ultrasonic wave frequency is 27kHz, the power is 0.4W / cm 2 , add half of the total amount of electrolyte, half of the total amount of leveling agent, acid dye and reactive dye, the mass ratio of acid dye to the net weight of the cheese yarn is 2.5%, the mass ratio of reactive dye to the net weight of the cheese yarn is 4%, the pH is 4.5, and it is kept at 40°C for 5 minutes; heat it to 52°C at a heating rate of 1°C / min, add the other half of the electrolyte and the other half of the leveling agent, so that the total concentration of the electrolyte is 45g / L, the total concentration of the leveling agent is 1.2g / L, gradually add pH sliding agent, so that the pH slowly rises to 6 at a speed of 0.3 / min, and the concentration of pH sliding agent after addition is 1.2g / L, keep the pH stable at 6, and keep it for 5 minutes; heat it to 62°C at a heating rate of 1°C / min, ultrasonic frequency 40kHz, power 0.6W / cm 2, hold for 22 minutes; heat to 72℃ at a heating rate of 1℃ / min, add wool protective agent, the ratio of wool protective agent to the net weight of cheese yarn is 0.7%, hold for 5 minutes; heat to 82℃ at a heating rate of 2℃ / min, ultrasonic frequency 55kHz, power 0.9W / cm 2 , keep for 27 minutes; drain and wash with water.

[0036] In the above dyeing process, the electrolyte is sodium sulfate; the leveling agent is disodium alkylphenol polyoxyethylene ether (10) sulfosuccinate; the acid dye is acid red 88; the reactive dye is reactive red 198; the pH sliding agent is sodium trichloroacetate; and the wool protective agent is propylene glycol block polyether L-65.

[0037] Soaping process: reference Figure 4 , soak the cheese yarn in water, the mass ratio of the cheese yarn net weight to water is 1:10, heat to 40℃, add non-ionic surfactant and pH buffer, so that the concentration of non-ionic surfactant is 1.2g / L, the concentration of pH buffer is 0.7g / L, the pH is 5.7, and keep for 5min; heat to 50℃ at a heating rate of 1℃ / min, add compound soaping agent, so that the concentration of compound soaping agent is 1.2g / L, and keep for 10min; at this temperature of 50℃, continue to add rare earth complexing agent, so that the concentration of rare earth complexing agent is 0.6g / L, and keep for 5min; heat to 55℃ at a heating rate of 1℃ / min, and assist with ultrasonic wave for 10min, the ultrasonic frequency is 37kHz, and the power is 0.5W / cm 2 ; Cool naturally to below 40°C, drain the liquid, and perform only one cold water wash, with the mass ratio of the net weight of the cheese yarn to the cold water being 1:10; and obtain dyed cheese yarn.

[0038] In the above soaping process, the nonionic surfactant is fatty alcohol polyoxyethylene ether; the pH buffer is an acetic acid and sodium acetate buffer system; the compound soaping agent is composed of laccase and cutinase in a mass ratio of 7:3; and the rare earth complexing agent is lanthanum citrate.

[0039] Example 2 The invention discloses a wool-viscose blended yarn dyeing process, namely a cheese yarn dyeing process, which comprises a pre-treatment process, a dyeing process and a soaping process.

[0040] Pretreatment process: soak the cheese yarn in water with a mass ratio of 1:15 between the net weight of the cheese yarn and water, add degreasing agent to make the concentration of degreasing agent 2g / L, the pH of the soaking liquid is neutral, and keep it at 38℃ for 4min; then heat it to 50℃ at a heating rate of 1℃ / min, add complex enzyme to make the concentration of complex enzyme 3g / L, and keep it at 8min; at the temperature of 50℃, then add bleaching stabilizer to make the concentration of bleaching stabilizer 1g / L, gradually add pH buffer to make the pH rise slowly to 0.2 / min. After reaching 7.8, keep the pH value stable at 7.8 for 35 minutes; heat to 80℃ at a heating rate of 2℃ / min and keep it for 5 minutes, then cool and drain; add water to soak the cheese yarn, the mass ratio of the cheese yarn net weight to water is 1:10, heat to 38℃, add bleach activator and bleaching agent, so that the concentration of the bleach activator is 1g / L, the concentration of the bleaching agent is 5g / L, and the pH reaches 8.2, keep it for 4 minutes; heat to 60℃ at a heating rate of 1℃ / min and keep it for 25 minutes; cool to below 40℃, drain and wash with water.

[0041] In the above pretreatment process: the degreasing agent is fatty amine polyoxyethylene ether; the complex enzyme is lipase, degradation protease and anti-shrinkage protease in a mass ratio of 3:3:4, the degradation protease is subtilisin, and the anti-shrinkage protease is glutamine transaminase; the bleaching stabilizer is ethylenediaminetetramethylenephosphonic acid; the pH buffer is acetic acid and sodium acetate buffer system; the bleaching activator is tetraacetylethylenediamine; and the bleaching agent is hydrogen peroxide.

[0042] Dyeing process: Soak the cheese in water with a mass ratio of 1:10 between the net weight of the cheese and water. Turn on the ultrasonic wave with a frequency of 27kHz and a power of 0.4W / cm 2 , add half of the total amount of electrolyte, half of the total amount of leveling agent, acid dye and reactive dye, the mass ratio of acid dye to the net weight of the cheese yarn is 2%, the mass ratio of reactive dye to the net weight of the cheese yarn is 3%, the pH is 5, and it is kept at 38°C for 4 minutes; heat it to 50°C at a heating rate of 1°C / min, add the other half of the electrolyte and the other half of the leveling agent, so that the total concentration of the electrolyte is 40g / L, the total concentration of the leveling agent is 1g / L, gradually add pH sliding agent, so that the pH slowly rises to 5.8 at a speed of 0.3 / min, and the concentration of pH sliding agent after addition is 1g / L, keep the pH stable at 5.8, and keep it for 4 minutes; heat it to 60°C at a heating rate of 1°C / min, ultrasonic frequency 40kHz, power 0.6W / cm 2, hold for 20 minutes; heat to 70℃ at a heating rate of 1℃ / min, add wool protective agent, the ratio of wool protective agent to the net weight of cheese yarn is 0.5%, hold for 4 minutes; heat to 80℃ at a heating rate of 2℃ / min, ultrasonic frequency 55kHz, power 0.9W / cm 2 , keep for 25 minutes; drain and wash with water.

[0043] In the above dyeing process, the electrolyte is sodium sulfate; the leveling agent is disodium alkylphenol polyoxyethylene ether (10) sulfosuccinate; the acid dye is acid red 88; the reactive dye is reactive red 198; the pH sliding agent is sodium trichloroacetate; and the wool protective agent is propylene glycol block polyether L-65.

[0044] Soaping process: soak the cheese yarn in water with a mass ratio of the net weight of the cheese yarn to water of 1:10, heat to 38°C, add non-ionic surfactant and pH buffer to make the concentration of non-ionic surfactant 1g / L, pH buffer concentration 0.5g / L, pH 5.5, and maintain for 4 minutes; heat to 50°C at a heating rate of 1°C / min, add compound soaping agent to make the concentration of compound soaping agent 1g / L, and maintain for 8 minutes; at the temperature of 49°C, continue to add rare earth complexing agent to make the concentration of rare earth complexing agent 0.5g / L, and maintain for 4 minutes; heat to 54°C at a heating rate of 1°C / min, and use ultrasonic assistance for 8 minutes. The ultrasonic frequency is 37kHz and the power is 0.5W / cm 2 ; Cool naturally to below 40°C, drain the liquid, and perform only one cold water wash, with the mass ratio of the net weight of the cheese yarn to the cold water being 1:10; and obtain dyed cheese yarn.

[0045] In the above soaping process, the nonionic surfactant is fatty alcohol polyoxyethylene ether; the pH buffer is an acetic acid and sodium acetate buffer system; the compound soaping agent is composed of laccase and cutinase in a mass ratio of 6:4; and the rare earth complexing agent is lanthanum citrate.

[0046] Example 3 The invention discloses a wool-viscose blended yarn dyeing process, namely a cheese yarn dyeing process, which comprises a pre-treatment process, a dyeing process and a soaping process.

[0047] Pretreatment process: soak the cheese yarn in water with a mass ratio of 1:15 between the net weight of the cheese yarn and water, add a degreaser to make the degreaser concentration 3g / L, and keep the pH of the soaking liquid at 42℃ for 6min; then heat it to 55℃ at a heating rate of 1℃ / min, add the complex enzyme to make the complex enzyme concentration 5g / L, and keep it for 12min; at this temperature of 55℃, then add the bleaching stabilizer to make the bleaching stabilizer concentration 1.5g / L, and gradually add the pH buffer to make the pH rise slowly at a rate of 0.2 / min After the pH value reaches 8.2, keep it stable at 8.2 for 40 minutes; heat it to 85°C at a heating rate of 2°C / min and keep it for 10 minutes, then cool and drain; add water to soak the cheese yarn, the mass ratio of the cheese yarn net weight to water is 1:10, heat it to 42°C, add bleach activator and bleaching agent, so that the concentration of the bleach activator is 2g / L, the concentration of the bleaching agent is 8g / L, and the pH reaches 7.8, and keep it for 6 minutes; heat it to 65°C at a heating rate of 1°C / min and keep it for 30 minutes; cool it to below 40°C, drain the liquid, and wash it with water.

[0048] In the above pretreatment process: the degreasing agent is fatty amine polyoxyethylene ether; the complex enzyme is lipase, degradation protease and anti-shrinkage protease in a mass ratio of 3:3:4, the degradation protease is subtilisin, and the anti-shrinkage protease is glutamine transaminase; the bleaching stabilizer is ethylenediaminetetramethylenephosphonic acid; the pH buffer is acetic acid and sodium acetate buffer system; the bleaching activator is tetraacetylethylenediamine; and the bleaching agent is hydrogen peroxide.

[0049] Dyeing process: Soak the cheese in water with a mass ratio of 1:10 between the net weight of the cheese and water. Turn on the ultrasonic wave with a frequency of 27kHz and a power of 0.4W / cm 2 , add half of the total amount of electrolyte, half of the total amount of leveling agent, acid dye and reactive dye, the mass ratio of acid dye to the net weight of the cheese yarn is 3%, the mass ratio of reactive dye to the net weight of the cheese yarn is 5%, the pH is 4, and it is kept at 42°C for 6 minutes; heat it to 55°C at a heating rate of 1°C / min, add the other half of the electrolyte and the other half of the leveling agent, so that the total concentration of the electrolyte is 50g / L, the total concentration of the leveling agent is 1.5g / L, gradually add pH sliding agent, so that the pH slowly rises to 6.2 at a speed of 0.3 / min, and the concentration of pH sliding agent after addition is 1.5g / L, keeping the pH stable at 6.2 for 6 minutes; heat it to 65°C at a heating rate of 1°C / min, ultrasonic frequency 40kHz, power 0.6W / cm 2, keep for 25min; heat to 75℃ at a heating rate of 1℃ / min, add wool protective agent, the ratio of wool protective agent to the net weight of cheese yarn is 1%, keep for 6min; heat to 85℃ at a heating rate of 2℃ / min, ultrasonic frequency 55kHz, power 0.9W / cm 2 , keep for 30 minutes; drain and wash with water.

[0050] In the above dyeing process, the electrolyte is sodium sulfate; the leveling agent is disodium alkylphenol polyoxyethylene ether (10) sulfosuccinate; the acid dye is acid red 88; the reactive dye is reactive red 198; the pH sliding agent is sodium trichloroacetate; and the wool protective agent is propylene glycol block polyether L-65.

[0051] Soaping process: soak the cheese yarn in water with a mass ratio of the net weight of the cheese yarn to water of 1:10, heat to 42°C, add non-ionic surfactant and pH buffer to make the concentration of non-ionic surfactant 1.5g / L, pH buffer concentration 1g / L, pH 6, and maintain for 6 minutes; heat to 51°C at a heating rate of 1°C / min, add compound soaping agent to make the concentration of compound soaping agent 1.5g / L, and maintain for 12 minutes; at the temperature of 51°C, continue to add rare earth complexing agent to make the concentration of rare earth complexing agent 0.8g / L, and maintain for 6 minutes; heat to 56°C at a heating rate of 1°C / min, and use ultrasonic assistance for 12 minutes. The ultrasonic frequency is 37kHz and the power is 0.5W / cm 2 ; Cool naturally to below 40°C, drain the liquid, and perform only one cold water wash, with the mass ratio of the net weight of the cheese yarn to the cold water being 1:10; and obtain dyed cheese yarn.

[0052] In the above soaping process, the nonionic surfactant is fatty alcohol polyoxyethylene ether; the pH buffer is an acetic acid and sodium acetate buffer system; the compound soaping agent is composed of laccase and cutinase in a mass ratio of 8:2; and the rare earth complexing agent is lanthanum citrate.

[0053] Comparative Example 1 This comparative example provides a wool-viscose blended yarn dyeing process, which is different from Example 1 only in that the leveling agent alkylphenol polyoxyethylene ether (10) sulfosuccinate disodium in the dyeing process is replaced by octylphenol polyoxyethylene ether.

[0054] Comparative Example 2 This comparative example provides a wool-viscose blended yarn dyeing process, the only difference from Example 1 is that the leveling agent alkylphenol polyoxyethylene ether (10) sulfosuccinate disodium in the dyeing process is replaced by sodium hexadecylsulfonate.

[0055] Comparative Example 3 The comparative example provides a wool-viscose blended yarn dyeing process, and the only difference from Example 1 is that the leveling agent alkylphenol polyoxyethylene (10) sulfonate succinic acid monoester disodium in the dyeing process is replaced by sodium lauryl sulfosuccinate.

[0056] Comparative Example 4 The comparative example provides a wool-viscose blended yarn dyeing process, and the only difference from Example 1 is that the leveling agent alkylphenol polyoxyethylene (10) sulfonate succinic acid monoester disodium in the dyeing process is replaced by sodium lauryl sulfosuccinate.

[0057] Test Example 1 The dyeing cones obtained in Examples 1-3 and Comparative Examples 1-4 were tested as follows: (1) The color depth K / S value (Kubelka-Munk value) of the outer, middle and inner layers of the cones was tested using a Datacolor SF600X spectrophotometer, and the results are shown in Table 1. (2) The outer layer yarn of the cones was taken as a reference to test the color fastness according to GB / T 5713-2013, and the results are shown in Table 2.

[0058] Table 1: Color difference test of inner, middle and outer layers of cones The results in Table 1 show that the color uniformity of the dyeing cones obtained in Examples 1-3 and Comparative Examples 1-4 is good. Relatively speaking, the color difference of the inner, middle and outer layers of the dyeing cones of Examples 1-3 is smaller, indicating that the use of alkylphenol polyoxyethylene (10) sulfonate succinic acid monoester disodium as the leveling agent has strong penetration of the dyeing liquid into the cones, and the dyeing of each layer is uniform. The color difference of the inner, middle and outer layers of the dyeing cones of Comparative Examples 1-4 is slightly larger than that of Examples 1-3, because the replacement of alkylphenol polyoxyethylene (10) sulfonate succinic acid monoester disodium with octylphenol polyoxyethylene, sodium hexadecyl sulfonate, lauryl sulfosuccinate disodium salt or octadecyl polyoxyethylene ether results in a decrease in the ability of the dyeing liquid to penetrate the yarn layers, leading to a decrease in the color uniformity of the inner, middle and outer layers of the cones.

[0059] Table 2: Color fastness test The results in Table 2 show that the dyeing cones obtained in Examples 1-3 and Comparative Examples 1-4 all have good water color fastness, and the water color fastness of Comparative Examples 2 and 4 is relatively low.

[0060] The wool-viscose blended yarn dyeing process of the present application dyes the wool-viscose blended yarn with a combination of reactive and acid dyes, balances the dyeing rates of wool fibers and viscose fibers by adding sodium sulfate and leveling agents in sections and using four-stage temperature raising and holding, and the color of the inner, middle and outer layers of the yarn is uniform, and the color fastness is excellent.

[0061] Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A wool-viscose blended yarn dyeing process, characterized in that: The wool-viscose blended yarn is prepared from wool fiber and viscose fiber, and the wool-viscose blended yarn is wound into cheese yarn; the wool-viscose blended yarn dyeing process includes a pre-treatment process, a dyeing process and a soaping process; The pre-treatment process uses a degreasing agent, a complex enzyme, a bleaching stabilizer, a pH buffer, a bleaching agent and a bleaching activator to treat the cheese yarn; the complex enzyme includes lipase, a degrading protease and an anti-shrinkage protease; The dyeing process is assisted by ultrasound and uses acid dyes, reactive dyes, electrolytes, leveling agents, pH sliding agents and wool protective agents to dye the cheese yarn.

2. The wool-viscose blended yarn dyeing process according to claim 1, characterized in that: The pretreatment process includes: soaking the cheese yarn in water, adding a degreasing agent to make the degreasing agent concentration of 2-3g / L, and maintaining it at 38-42°C for 4-6 minutes; then heating it to 50-55°C, adding the complex enzyme to make the complex enzyme concentration of 3-5g / L, and maintaining it for 8-12 minutes; then adding the bleaching stabilizer and the pH buffer at the temperature of 50-55°C, making the concentration of the bleaching stabilizer 1-1.5g / L, and making the pH The method comprises the steps of: heating the cheese yarn to a pH of 7.8-8.2 and maintaining the pH value for 35-40 minutes; heating the cheese yarn to 80-85° C. and maintaining the pH value for 5-10 minutes, then cooling the cheese yarn and draining the cheese yarn; adding water to soak the cheese yarn, heating the cheese yarn to 38-42° C., adding the bleach activator and the bleaching agent so that the concentration of the bleach activator is 1-2 g / L, the concentration of the bleaching agent is 5-8 g / L, and the pH value is 7.8-8.2, and maintaining the pH value for 4-6 minutes; heating the cheese yarn to 60-65° C. and maintaining the pH value for 25-30 minutes; draining the cheese yarn and washing the cheese yarn with water.

3. The wool-viscose blended yarn dyeing process according to claim 1 or 2, characterized in that: The degreasing agent is fatty amine polyoxyethylene ether; the bleaching stabilizer is organic phosphonate; the bleaching agent is hydrogen peroxide; and the bleaching activator is tetraacetylethylenediamine.

4. The wool-viscose blended yarn dyeing process according to claim 1, characterized in that: The dyeing process includes: soaking the cheese yarn in water, turning on ultrasonic wave, adding a portion of the electrolyte, a portion of the leveling agent, the acid dye and the reactive dye, wherein the mass ratio of the acid dye to the net weight of the cheese yarn is 2-3%, the mass ratio of the reactive dye to the net weight of the cheese yarn is 3-5%, the pH value is 4-5, and the cheese yarn is kept at 38-42° C. for 4-6 minutes; heating the cheese yarn to 50-55° C., adding another portion of the electrolyte, another portion of the leveling agent and the pH sliding agent, so that the electrolyte The total concentration of the solvent is 40-50 g / L, the total concentration of the leveling agent is 1-1.5 g / L, the concentration of the pH sliding agent is 1-1.5 g / L, the pH is raised to 5.8-6.2, and maintained for 4-6 minutes; heated to 60-65° C. and maintained for 20-25 minutes; heated to 70-75° C., added with the wool protective agent, the ratio of the wool protective agent to the net weight of the cheese yarn is 0.5-1%, and maintained for 4-6 minutes; heated to 80-85° C. and maintained for 25-30 minutes; drained and washed with water.

5. The wool-viscose blended yarn dyeing process according to claim 1 or 4, characterized in that: The acid dye is acid red 88; the reactive dye is reactive red 198; and the leveling agent is disodium alkylphenol polyoxyethylene ether (10) sulfosuccinate monoester.

6. The wool-viscose blended yarn dyeing process according to claim 1, characterized in that: The soaping process uses a nonionic surfactant, a pH buffer, a compound soaping agent and a rare earth complexing agent to wash the cheese yarn; the compound soaping agent includes laccase and cutinase.

7. The wool-viscose blended yarn dyeing process according to claim 6, characterized in that: The soap washing process includes: soaking the cheese yarn in water, heating it to 38-42° C., adding the nonionic surfactant and the pH buffer to make the concentration of the nonionic surfactant 1-1.5 g / L and the pH 5.5-6, and maintaining it for 4-6 minutes; heating it to 49-51° C., adding the compound soaping agent to make the concentration of the compound soaping agent 1-1.5 g / L, and maintaining it for 8-12 minutes; continuing to add the rare earth complexing agent at the temperature of 49-51° C. to make the concentration of the rare earth complexing agent 0.5-0.8 g / L, and maintaining it for 4-6 minutes; heating it to 54-56° C., ultrasonically assisting it for 8-12 minutes; draining the liquid, and washing with water.

8. The wool-viscose blended yarn dyeing process according to claim 7, characterized in that: The nonionic surfactant is fatty alcohol polyoxyethylene ether; the compound soaping agent is composed of laccase and cutinase in a mass ratio of (6-8): (2-4); and the rare earth complexing agent is lanthanum citrate.

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