Dyeing method of active turquoise blue color matching composition

Abstract

The invention provides a dyeing method of an active turquoise blue color matching composition. The dyeing method comprises the following steps: putting a dyed object in a dye vat, adding water according to a bath ratio of 1: (5-25), heating the dye vat to 50-60 DEG C while keeping the running state, adding a chelating dispersant, running for 5-10 minutes, linearly adding an active turquoise blue color matching composition within 10-15 minutes, running for 5-10 minutes, adding electrolyte within 10-20 minutes, running for 5-10 minutes, adding an alkaline pH slipping agent to adjust the pH value of a dye bath to be 10-11, running for 5-10 minutes, and finally adding a chelating agent to carry out chelating treatment. Then heating to 105 DEG C at the rate of 1-2 DEG C / min, carrying out heat preservation dyeing for 30-60 minutes, finally cooling to 60 DEG C or below, and carrying out post-treatment, dehydration and drying to finish dyeing. According to the dyeing method provided by the invention, dyeing is carried out at 105 DEG C, level dyeing and compatible color matching of the reactive turquoise blue dye on the pure cotton fabric can be realized, and the dyeing method has the characteristics of high color yield, good level dyeing property, difficulty in dyeing defects and good dyeing reproducibility.

Description

Technical Field

[0001] The invention relates to the technical field of dyeing cellulose textiles, in particular to a dyeing method containing an active turquoise blue color combination composition. Background Art

[0002] Reactive turquoise blue KN-G (CI Reactive Blue 21) is a vinyl sulfone type reactive dye containing a copper phthalocyanine structure, and its structural formula is shown in Formula I:

[0003]

[0004] This dye is a blue dye with bright green light. It can be used for dyeing and printing of cotton, viscose and other fibers. It plays an important role in complementing the turquoise blue dye spectrum among reactive dyes. Due to the presence of phthalocyanine structure in the molecule, the molecule is planar rather than linear, and there are fewer water-soluble sulfonic acid groups in the molecule, the water solubility of reactive turquoise blue KN-G is poor, resulting in many problems in the dyeing process, mainly manifested in:

[0005] (1) Poor salting resistance and easy to discolor

[0006] Reactive turquoise blue KN-G has a large molecular weight and a three-dimensional molecular structure. After being dissolved in water, the dye molecules tend to crystallize and are in a sol-like state in the aqueous solution. Its solubility is quite sensitive to electrolytes. When electrolytes are present, the crystallization of dye molecules is more obvious, and its sol gradually condenses into a mass. When the electrolyte concentration exceeds a certain amount, this condensation will dehydrate and form a precipitate (salting out). Therefore, when dyeing, the permeability and diffusion of reactive turquoise blue KN-G are poor. The dye easily accumulates on the fiber surface during the dyeing process, causing surface floating color. If special processes are not used, not only the color fastness (such as soap fastness and dry and wet friction fastness, etc.) is poor, but also color flowers, color marks and even color spots often occur.

[0007] The salting out of reactive turquoise blue is also very sensitive to changes in the pH value of the solution, especially under alkaline conditions. When the pH value of the solution is greater than 10, it is enough to cause the β-ethylsulfone sulfate group of most dyes to undergo an elimination reaction and convert into a vinylsulfone group. The β-ethylsulfone sulfate group is a water-soluble group of the dye. After converting to a vinylsulfone group, the solubility of the dye drops instantly. At this time, if there is a large amount of electrolyte in the solution, the salting out of the dye will be more obvious. Once salting out occurs, color spots, stains, and color flowers will appear in the dyeing, and the dyeing depth will be significantly reduced.

[0008] (2) The dyeing rate is low, making it difficult to match colors and mix them

[0009] The molecules of Reactive Turquoise Blue KN-G are three-dimensionally flat and large in size. They have low directness and affinity to cellulose fibers. Their specific transfer value (R) = 1, which is the largest among all reactive dyes. Therefore, the dyeing speed of Reactive Turquoise Blue is quite slow and the dyeing rate is also very low. Under the same dyeing conditions, it is more difficult to be completely absorbed by the fiber than other dyes. This also leads to poor compatibility and poor reproducibility when it is used for color matching dyeing with other vinyl sulfone dyes.

[0010] At present, methods such as adding chelating dispersants and leveling agents to the dye bath, adding salt and alkali in batches and steps, and controlling the heating rate to an extremely slow rate are often used in production to improve the dyeing problem of active turquoise blue dye. Although these methods have a certain effect on improving the leveling property of turquoise blue dye, they also have certain problems. For example, the method of adding a leveling agent, while improving the leveling property, will reduce the color yield of the dye to a certain extent due to the solubilization effect of the surfactant; and the method of adding salt and alkali in batches and steps affects the convenience of actual manipulation, and also affects the accuracy of dyeing once. However, even if these measures are taken, the probability of dyeing problems with turquoise blue dye is still very high, resulting in printing and dyeing companies often facing the problem of stripping and back-dyeing, and the problem of still not dyeing well after stripping. Therefore, how to improve the dyeing process or dyeing method to solve the dyeing problem of active turquoise blue dye is of great significance in actual production. Summary of the invention

[0011] 1. Technical issues to be resolved

[0012] In view of the shortcomings of the prior art, the present invention provides a dyeing method containing an active turquoise blue color combination composition, which is used to dye pure cotton fabric evenly at 105°C to solve the problems of slow dyeing rate of turquoise blue dye, poor dye migration, easy color bloom and low color yield.

[0013] (II) Technical solution

[0014] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0015] According to a first aspect of the present invention, there is provided a dyeing method containing a reactive turquoise blue color combination composition, comprising the following steps:

[0016] Place the dyed material in a dye vat, add water at a bath ratio of 1:5-25, raise the temperature of the dye vat to 50-60°C while keeping it in operation, add a chelating dispersant and operate for 5-10 minutes, then linearly add an active turquoise blue color combination within 10-15 minutes and operate for 5-10 minutes, then add electrolytes within 10-20 minutes and operate for 5-10 minutes, then add an alkaline pH slip agent to adjust the pH value of the dye bath to 10-11 and operate for 5-10 minutes, then raise the temperature to 105°C at a rate of 1-2°C / min, keep the temperature for dyeing for 30-60 minutes, finally cool down to below 60°C, and complete the dyeing through post-treatment, dehydration and drying.

[0017] In the conventional dyeing process, reactive turquoise blue dye is combined with other colors of the same type of vinyl sulfone reactive dyes, such as domestic B type, KN type, M type, etc. Conventional medium-temperature vinyl sulfone reactive dyes generally have high reactivity, and usually can achieve high dyeing rate and fixation rate at 60-70°C. Although reactive turquoise blue KN-G also belongs to the vinyl sulfone type dye, due to the difference in its dye matrix structure, the dyeing rate and dyeing rate are low at this temperature. Therefore, at the same dyeing temperature, it is far from reaching its maximum dyeing, which leads to poor compatibility of turquoise blue dye for combination dyeing and poor dyeing reproducibility. However, in actual production, the method of simply increasing the dyeing temperature cannot be used to solve the problem of poor compatibility of turquoise blue dye and conventional vinyl sulfone dye for combination dyeing. This is because the vinyl sulfone group has poor stability in high temperature resistance and alkali hydrolysis resistance. Under alkaline dyeing conditions, when the dyeing temperature rises to a certain degree, not only the speed of the reaction between the active group and the fiber increases rapidly, but also the hydrolysis rate and hydrolysis rate of the active group increase rapidly. At the same time, the probability of the already formed dye-fiber covalent bond being affected and the bond breaking also increases significantly, resulting in the dye being dyed faster, but the final color yield is lower. Therefore, heating up for the compatibility of vinyl sulfone reactive dyes not only cannot solve the original problem, but will make the problem more serious, and the original compatibility method cannot be adopted for color matching dyeing at high temperature (105°C). Therefore, the present invention solves the technical problems of slow dyeing rate, poor migration, easy color flower and low color yield of reactive turquoise KN-G dye by optimizing the dyeing process at 60°C.

[0018] Preferably, the reactive turquoise blue color-matching composition comprises CI reactive blue 21 and / or bis(monochlorotriazine) reactive dye, and the bis(monochlorotriazine) reactive dye is selected from at least one of reactive red KE-3B, reactive red KE-7B, reactive red KE-3G, reactive light yellow KE-3G, reactive yellow HE-4G, reactive orange KE-2G, reactive blue HE-RD and reactive blue HE-R.

[0019] The active turquoise color-matching compositions screened in the present application all contain two high-temperature-resistant and alkali-resistant monochlorotriazine active groups. According to the dyeing method of the present invention, cotton fabrics are dyed at 105°C, and the dye uptake and fixation rate curves are close to those of active turquoise blue KN-G, and the highest color yields of all dyes are obtained after dyeing at 105°C for 30 to 60 minutes. The active turquoise color-matching compositions of the present invention have good compatibility and are fully suitable for the dyeing process at 105°C.

[0020] The specific molecular structure of the reactive dyes used in combination with CI Reactive Blue 21 in the present invention is shown in Table 1:

[0021] Table 1

[0022]

[0023]

[0024] Preferably, the chelating dispersant is selected from sodium ethylenediaminetetraacetic acid chelating agents;

[0025] The added amount of the chelating dispersant is 0.2-0.5 g / L.

[0026] Preferably, the electrolyte is selected from sodium chloride or sodium sulfate;

[0027] When the amount of the active turquoise blue color-matching composition added is less than 1% owf, the amount of the electrolyte added is 20-40 g / L;

[0028] When the amount of the active turquoise blue color-matching composition added is 1% to 3% owf, the amount of the electrolyte added is 40 to 70 g / L;

[0029] When the amount of the active turquoise blue color-matching composition added is greater than 3% owf, the amount of the electrolyte added is 70-100 g / L.

[0030] Preferably, the alkaline pH slip agent is selected from sodium carbonate, sodium bicarbonate or a mixture of sodium carbonate and / or sodium bicarbonate and tetraethylammonium hydroxide.

[0031] When the alkali solution is a mixed alkali of tetraethylammonium hydroxide and sodium bicarbonate and / or sodium carbonate, the mass ratio of tetraethylammonium hydroxide to sodium bicarbonate and / or sodium carbonate is 3 to 4:1.

[0032] Preferably, the pre-treatment process of the dyed article is as follows:

[0033] Add water into the dye vat at a bath ratio of 1:8-30, raise the temperature to 30-40°C, add refining agent, caustic soda and hydrogen peroxide, then raise the temperature to 80-100°C and keep warm for 40-60 minutes, finally drain, wash with clean water, deoxygenate, superacidify, wash with water, and wait for dyeing.

[0034] Preferably, the refining agent is a non-ionic surfactant, and the amount of the refining agent added is 0.5 to 4 g / L;

[0035] The amount of caustic soda added is 1 to 4 g / L;

[0036] The concentration of the hydrogen peroxide is 25-35%, and the amount of the hydrogen peroxide added is 3-8 g / L.

[0037] Preferably, the deoxygenation step is: adding 0.5-1.5 g / L of deoxygenase at room temperature and running for 5-10 minutes, wherein the deoxygenase is selected from at least one of Terminox Supreme catalase, TF-160 deoxygenase, EFN-130 catalase, HG62 enzyme water, and RCCY50 deoxygenase;

[0038] The peracidification step is: adding 0.2-0.5 g / L of an acid agent at room temperature and running for 5-10 minutes, wherein the acid agent is glacial acetic acid.

[0039] Preferably, the post-treatment process is: discharge the residual dye liquid in the dye vat, add water at a bath ratio of 1:8-30, add 1-2 g / L of detergent, heat to 85-95° C. and operate for 10-30 min, drain the liquid, then wash with hot water at 40-60° C., add 0.5-1.0 g / L of acetic acid to neutralize, wash with water at room temperature, and dry to obtain a dyed product.

[0040] Preferably, the detergent is selected from at least one of detergent 209, detergent 101, and detergent 6501.

[0041] (III) Beneficial effects

[0042] The present invention provides a dyeing method containing an active turquoise blue color combination composition, which has the following beneficial effects:

[0043] (1) The present invention provides a dyeing method containing a reactive turquoise color combination composition. By changing the conventional dyeing process of vinyl sulfone type turquoise blue dye at 60-80°C and 15-20 g / L alkali to a high-temperature dyeing process at 105°C with the addition of 0.2-6 g / L alkaline pH slip agent, the technical problems of slow dyeing rate, poor dye migration, easy color fringing and low color yield of reactive turquoise blue KN-G dye can be solved. The turquoise blue dye is further matched with the selected dichloroisotriazine reactive dye to solve the technical problems of difficult compatibility of turquoise blue dye with conventional vinyl sulfone type reactive dyes at high temperature and poor dyeing reproducibility. The reactive turquoise blue KN-G dye can be matched with dyes on pure cotton fabrics to achieve rapid and level dyeing. The dye has the advantages of high color yield, good level dyeing, no easy color fringing, good dyeing reproducibility, high dyeing efficiency, energy saving and consumption reduction, etc.

[0044] (2) The present invention provides a dyeing method for a composite material containing active turquoise blue. By raising the dyeing and fixing temperature from the conventional 60°C to 105°C, the solubility of active turquoise blue at high temperature is greatly increased, and the solubility stability is improved. Therefore, the dye is not easy to salt out, and the problems of color difference, color spots and uneven dyeing caused by salting out are significantly improved.

[0045] (3) The present scheme provides a dyeing method containing a reactive turquoise blue color combination. The increase in dyeing temperature increases the reactivity between the dye and the fiber, increases the dye uptake rate, and significantly improves the dye uptake rate and fixation rate of the dye at the same dyeing time. Therefore, compared with the conventional 60°C process, the color yield of the fabric is significantly improved.

[0046] (4) The present scheme provides a dyeing method containing an active turquoise blue color combination composition. Increasing the dyeing temperature also increases the kinetic energy of the dye molecules in the dye bath, thereby increasing the diffusion coefficient of the dye and improving the diffusion performance. The dye in the solution is not easy to coagulate or flocculate, and the dye on the surface of the fabric is easier to migrate and diffuse into the fiber. Therefore, the dyeing levelness, dye penetration and easy washing properties are improved, and the color fastness is also improved.

[0047] (5) The present invention provides a dyeing method for a composition containing active turquoise blue, wherein the initial pH value of the dye bath is reduced from about 11.5 to about 10-11.0 by selecting an alkali agent (forming an alkaline pH slip agent) and reducing the amount of the alkali agent from the conventional 10-15 g / L to 0.2-6 g / L. The pH value after dyeing is further reduced to about 8-9 due to the high-temperature decomposition of tetraethylammonium hydroxide (TEAH). As a result, the problem of hydrolysis of the active base of the dye due to alkali at high temperature and the problem of bond breaking of the dye-fiber covalent bond are improved, ensuring that the dye will not cause a reduction in color yield due to hydrolysis even at high temperature.

[0048] (6) The present invention provides a dyeing method containing a reactive turquoise color combination composition, in which a preferred high-temperature type dichloro-s-triazine reactive dye is used to match the turquoise blue dye for color combination. Not only are the dye uptake and fixation rate curves of the different dyes close, but the highest color yield of all dyes can be obtained after dyeing at 105°C for 40 to 60 minutes, thereby solving the problem of poor compatibility of turquoise blue dye with conventional vinyl sulfone dyes and poor reproducibility of color combination dyeing.

[0049] (7) The present invention provides a dyeing method containing an active turquoise blue color combination composition. Since the dyeing rate of the dye increases at high temperature, the kinetic energy of the dye molecules increases, and the washability of the dye is enhanced, not only the dyeing time is greatly reduced, but also the number of water washings after dyeing is greatly reduced. It has the advantages of low water consumption, high dyeing efficiency, and obvious energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A process flow chart of a 105°C high temperature dyeing process provided in Example 1 of the present invention;

[0051] Figure 2 This is a flow chart of the conventional dyeing process at 60°C provided in Comparative Example 1 of the present invention. DETAILED DESCRIPTION

[0052] In order to better illustrate the content of the present invention, a detailed description is given below in conjunction with specific embodiments.

[0053] The relative color yield of the dyed fabric in the present invention is calculated according to formula (1):

[0054]

[0055] Calculation of fabric levelness (relative unevenness):

[0056] First, measure the K / S values ​​of any eight points on the dyed fabric, calculate the average K / S value of the eight points according to formula (2), and then calculate the relative deviation Sr of the K / S value of each point to the average value according to formula (3) to indicate the relative unevenness of the color of the fabric after dyeing.

[0057]

[0058] The chelating dispersant in this embodiment is selected from the chelating agent S produced by Ningbo Xinghua Company;

[0059] The deoxygenase is selected from Terminox Supreme catalase produced by Novozymes (China) Investment Co., Ltd.;

[0060] The detergent is selected from the detergent 209 of Zhejiang Chuanhua Co., Ltd.

[0061] The dyeing method of a reactive turquoise blue color combination composition provided by the present invention is further explained below in conjunction with specific examples.

[0062] Example 1

[0063] Reactive turquoise blue dye dyeing process for pure cotton fabric, the process flow is as follows Figure 1 As shown:

[0064] (1) Pretreatment: 100 kg of pure cotton fabric was placed in a dye bath prepared at a bath ratio of 1:10, and the mixture was run at room temperature for 5 min. 2.0 g / L of high-efficiency refining agent G, 4 g / L of caustic soda and 6 g / L of hydrogen peroxide (mass fraction 30%) were added, and the mixture was heated to 95°C and run for 60 min. The mixture was drained and washed with clean water, and then 0.5 g / L of deoxygenase was added to remove excess hydrogen peroxide. Finally, 0.5 g / L of acetic acid was added to neutralize the residual alkali on the fabric surface, and the mixture was drained and washed with cold water again. The mixture was drained and then clean water was added to the above bath ratio.

[0065] (2) Dyeing: Heat the dye vat to 60°C, add 0.2 g / L of chelating agent S to the dye bath, run for 5 minutes, then add 1 kg of pre-dissolved active turquoise blue dye to the auxiliary vat, add the dye solution to the dye vat with the help of reflux water for 10 minutes, run for 10 minutes to make the dye fully mixed in the dye bath; then linearly add 40 g / L of sodium sulfate to the dye vat within 10 minutes, run for 10 minutes; then linearly add 3 g / L of TEAH / sodium carbonate mixed alkali with a mass ratio of 3.85:1 within 10 minutes, run for 5 minutes, and adjust the initial dye bath pH value to 11.0; then heat to 105°C at a rate of 1°C / min, keep at 105°C for 40 minutes; finally cool to below 60°C to complete the dyeing.

[0066] (3) Post-treatment: drain the liquid, add water according to the above bath ratio, add 2g / L detergent 209 solution, heat to 90°C, and operate for 20min; drain the liquid, wash with hot water at 60°C, add 1.0g / L acetic acid to neutralize the cloth surface, drain the liquid, wash with water at room temperature, take out the cloth and dry it to obtain the dyed product.

[0067] Example 2

[0068] Dyeing process of pure cotton fabric with reactive turquoise blue dye:

[0069] (1) Pretreatment: 100 kg of pure cotton fabric was placed in a dye bath prepared at a bath ratio of 1:10, and the mixture was run at room temperature for 5 min. 2.0 g / L of high-efficiency refining agent G, 4 g / L of caustic soda and 6 g / L of hydrogen peroxide (mass fraction 30%) were added, and the mixture was heated to 95°C and run for 60 min. The mixture was drained and washed with clean water, and then 0.5 g / L of deoxygenase was added to remove excess hydrogen peroxide. Finally, 0.5 g / L of acetic acid was added to neutralize the residual alkali on the fabric surface, and the mixture was drained and washed with cold water again. The mixture was drained and then clean water was added to the above bath ratio.

[0070] (2) Dyeing: Heat the dye vat to 60°C, add 0.2 g / L of chelating agent S to the dye bath, run for 5 minutes, then add 1 kg of pre-dissolved active turquoise blue dye to the auxiliary vat, add the dye liquor to the dye vat with the help of reflux water, run for 10 minutes, so that the dye is fully mixed in the dye bath; then linearly add 40 g / L of sodium sulfate to the dye vat within 10 minutes, run for 15 minutes; then linearly add 3 g / L of TEAH / sodium bicarbonate mixed alkali with a mass ratio of 3.4:1 within 10 minutes, run for 5 minutes, and adjust the initial dye bath pH to 11.0; then heat to 105°C at a rate of 1°C / min, keep at 105°C for 60 minutes; finally cool to below 60°C to complete the dyeing.

[0071] (3) Post-treatment: drain the liquid, add water according to the above bath ratio, add 2g / L detergent 209 solution, heat to 90°C, and operate for 20min; drain the liquid, wash with hot water at 60°C, add 1.0g / L acetic acid to neutralize the cloth surface, drain the liquid, wash with water at room temperature, take out the cloth and dry it to obtain the dyed product.

[0072] Example 3

[0073] Dyeing process of 32S pure cotton knitted fabric with mixed dye of turquoise blue dye, reactive yellow HE-4G and reactive blue KE-R to dye grass green:

[0074] (1) Pretreatment: 200 kg of 32S pure cotton fabric was placed in a dye bath prepared at a bath ratio of 1:8, and run at room temperature for 5 min. 2.0 g / L of high-efficiency refining agent G, 4 g / L of caustic soda and 6 g / L of hydrogen peroxide (mass fraction 30%) solution were added, and the temperature was raised to 95°C and run for 60 min. The fabric was drained and washed with clean water, and then 0.5 g / L of deoxygenase was added to remove excess hydrogen peroxide. Finally, 0.5 g / L of acetic acid was added to neutralize the residual alkali on the fabric surface, and the fabric was drained and washed with cold water again. The fabric was drained and then injected with clean water to the above bath ratio.

[0075] (2) Dyeing: Place 200 kg of pre-treated 32S pure cotton knitted fabric into a dye bath prepared at a bath ratio of 1:8, run for 5 min, linearly add 0.5 kg of pre-dissolved reactive turquoise blue KN-G, 0.4 kg of reactive yellow HE-4G, and 0.03 kg of reactive blue KE-R within 15 min, run for 5 min, linearly add 48 kg of anhydrous sodium sulfate within 15 min, run for 15 min, add 3.8 kg of sodium bicarbonate / TEAH mixed alkali (mass ratio 1:3.4), run for 5 min, heat to 105 °C at a heating rate of 1 °C / min, run for 50 min, cool and drain.

[0076] (3) Post-treatment: First wash with 50°C warm water, drain the liquid and add detergent 209 solution at a concentration of 2g / L, heat to 95°C at 2°C / min, run for 15min, cool down and drain the liquid, wash again with cold water, drain the liquid out of the vat, dehydrate and dry to obtain the finished product.

[0077] Example 4

[0078] (1) Pretreatment: 200 kg of pure cotton fabric was placed in a dye bath prepared at a bath ratio of 1:6, and the mixture was run at room temperature for 5 min. 2.0 g / L of high-efficiency refining agent G, 4 g / L of caustic soda and 6 g / L of hydrogen peroxide (mass fraction 30%) were added, and the mixture was heated to 95°C and run for 60 min. The mixture was drained and washed with clean water, and then 0.5 g / L of deoxygenase was added to remove excess hydrogen peroxide. Finally, 0.5 g / L of acetic acid was added to neutralize the residual alkali on the fabric surface, and the mixture was drained and washed with cold water again. The mixture was drained and then clean water was added to the above bath ratio.

[0079] (2) Dyeing: Place 200 kg of pre-treated viscose knitted fabric into a dye bath prepared at a bath ratio of 1:6, heat the dye bath to 60°C, and run for 5 minutes; linearly add 3 kg of pre-dissolved reactive turquoise KN-G and 1 kg of reactive red KE-3B within 15 minutes, run for 10 minutes, linearly add 60 kg of anhydrous sodium sulfate within 20 minutes, run for 15 minutes, add 0.48 kg of a mixed alkali of TEAH / sodium bicarbonate with a mass ratio of 3.6:1, run for 10 minutes, heat to 105°C at a heating rate of 1°C / min and run for 30 minutes to fully dye the reactive dye, and finally cool to below 70°C at a rate of 2°C / min, drain, and dyeing is completed.

[0080] (3) Post-treatment: First wash once with warm water at 50°C, drain the liquid and add 3.6 kg of detergent 209 into the water, heat to 90°C at 2°C / min and run for 15 min, cool down and drain the liquid, wash again with cold water, drain the liquid out of the vat, dehydrate and dry to obtain the finished product.

[0081] Comparative Example 1

[0082] The process flow of conventional dyeing at 60℃ is as follows Figure 2 As shown:

[0083] (1) Pretreatment: 100 kg of pure cotton fabric was placed in a dye bath prepared at a bath ratio of 1:10, and the mixture was run at room temperature for 5 min. 2.0 g / L of high-efficiency refining agent G, 4 g / L of caustic soda and 6 g / L of hydrogen peroxide (mass fraction 30%) were added, and the mixture was heated to 95°C and run for 60 min. The mixture was drained and washed with clean water, and then 0.5 g / L of deoxygenase was added to remove excess hydrogen peroxide. Finally, 0.5 g / L of acetic acid was added to neutralize the residual alkali on the fabric surface, and the mixture was drained and washed with cold water again. The mixture was drained and then clean water was added to the above bath ratio.

[0084] (2) Dyeing: Heat the dye vat to 60°C, add 1 kg of pre-dissolved reactive turquoise blue dye into the secondary vat, add the dye solution into the dye vat within 30 minutes with the help of reflux water, run for 20 minutes to allow the dye to be fully mixed in the dye bath, then linearly add 50 g / L of anhydrous sodium sulfate into the dye vat within 30 minutes, run for 20 minutes, then linearly add 10 g / L of sodium carbonate within 30 minutes, adjust the initial dye bath pH to 11.0, maintain 60°C for 60 minutes of color fixation, and finally cool down to below 60°C to complete dyeing.

[0085] (3) Post-treatment: drain the liquid, add water according to the above bath ratio, add 2g / L detergent 209 solution, heat to 90°C, and operate for 20min; drain the liquid, wash with hot water at 40-60°C, add 1.0g / L acetic acid to neutralize the cloth surface, drain the liquid, wash with water at room temperature, and dry the cloth to obtain the dyed product.

[0086] The performance of the dyed products obtained in Example 1 and Comparative Example 1 was tested, as shown in Table 2 and Table 3:

[0087] Table 2

[0088]

[0089] According to Table 2, the K / S value and relative color yield of reactive turquoise KN-G dyed fabrics are much higher than those at room temperature (60°C) by using high temperature (105°C) dyeing process. Not only is the color yield of the dye 26% higher than that at room temperature, but the relative unevenness (Sr) is also reduced from 0.93 to 0.34, and the levelness of the fabric is significantly improved. In addition, the time to reach dyeing equilibrium is reduced when using high temperature dyeing process, so the total time consumed is also less.

[0090] Table 3

[0091]

[0092] According to the data in Table 3, the color fastness of reactive turquoise blue KN-G using the high temperature (105°C) dyeing process is significantly improved by half a level to one level compared with the conventional 60°C dyeing process.

[0093] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dyeing method containing an active turquoise blue color combination composition, characterized in that: The following steps are involved: Place the dyed material in a dye vat, add water at a bath ratio of 1:5-25, raise the temperature of the dye vat to 50-60°C while keeping it in operation, add a chelating dispersant and operate for 5-10 minutes, then linearly add an active turquoise blue color combination within 10-15 minutes and operate for 5-10 minutes, then add electrolytes within 10-20 minutes and operate for 5-10 minutes, then add an alkaline pH slip agent to adjust the pH value of the dye bath to 10-11 and operate for 5-10 minutes, then raise the temperature to 105°C at a rate of 1-2°C / min, keep the temperature for dyeing for 30-60 minutes, finally cool down to below 60°C, and complete the dyeing through post-treatment, dehydration and drying.

2. A dyeing method containing an active turquoise blue color combination composition according to claim 1, characterized in that: The reactive turquoise color combination composition comprises CI reactive blue 21 and / or bis(monochloro-s-triazine) reactive dye, wherein the bis(monochloro-s-triazine) reactive dye is selected from at least one of reactive red KE-3B, reactive red KE-7B, reactive red KE-3G, reactive yellow KE-3G, reactive yellow HE-4G, reactive orange KE-2G, reactive blue HE-RD and reactive blue HE-R.

3. A dyeing method containing a reactive turquoise blue color combination composition according to claim 1, characterized in that: The chelating dispersant is selected from the group consisting of sodium ethylenediaminetetraacetate chelating agents; The added amount of the chelating dispersant is 0.2-0.5 g / L.

4. The dyeing method of a reactive turquoise blue color combination composition according to claim 1, characterized in that: The electrolyte is selected from sodium chloride or sodium sulfate; When the amount of the active turquoise blue color-matching composition added is less than 1% owf, the amount of the electrolyte added is 20-40 g / L; When the amount of the active turquoise blue color-matching composition added is 1% to 3% owf, the amount of the electrolyte added is 40 to 70 g / L; When the amount of the active turquoise blue color-matching composition added is greater than 3% owf, the amount of the electrolyte added is 70-100 g / L.

5. The dyeing method of a reactive turquoise blue color combination composition according to claim 1, characterized in that: The alkaline pH slip agent is selected from sodium carbonate, sodium bicarbonate or a mixture of sodium carbonate and / or sodium bicarbonate and tetraethylammonium hydroxide.

6. The dyeing method of a reactive turquoise blue color combination composition according to claim 1, characterized in that: The pre-treatment process of the dyed article is as follows: Add water into the dye vat at a bath ratio of 1:8-30, raise the temperature to 30-40°C, add refining agent, caustic soda and hydrogen peroxide, then raise the temperature to 80-100°C and keep warm for 40-60 minutes, finally drain, wash with clean water, deoxygenate, superacidify, wash with water, and wait for dyeing.

7. A dyeing method containing a reactive turquoise blue color combination composition according to claim 6, characterized in that: The refining agent is a non-ionic surfactant, and the addition amount of the refining agent is 0.5-4 g / L; The amount of caustic soda added is 1 to 4 g / L; The concentration of the hydrogen peroxide is 25-35%, and the added amount of the hydrogen peroxide is 3-8 g / L.

8. The dyeing method of a reactive turquoise blue color combination composition according to claim 6, characterized in that: The deoxygenation step comprises: adding 0.5-1.5 g / L of deoxygenase at room temperature and operating for 5-10 minutes, wherein the deoxygenase is selected from at least one of Terminox Supreme catalase, TF-160 deoxygenase, EFN-130 catalase, HG62 enzyme water, and RCCY50 deoxygenase; The peracidification step is: adding 0.2-0.5 g / L of an acid agent at room temperature and running for 5-10 minutes, wherein the acid agent is glacial acetic acid.

9. The dyeing method of a reactive turquoise blue color combination composition according to claim 1, characterized in that: The post-treatment process is as follows: discharge the residual dyeing liquid in the dyeing vat, add water at a bath ratio of 1:8-30, add 1-2 g / L of detergent, heat to 85-95° C. and operate for 10-30 minutes, drain the liquid, wash with hot water at 40-60° C., add 0.5-1.0 g / L of acetic acid to neutralize, wash with water at room temperature, and dry to obtain a dyed product.

10. A dyeing method containing a reactive turquoise blue color combination composition according to claim 9, characterized in that: The detergent is selected from at least one of detergent 209, detergent 101, and detergent 6501.

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