阅读说明：本技术 一种活性染料色泣牢度提升剂及其制备方法和应用 (Reactive dye color fastness improver and preparation method and application thereof ) 是由 傅秀成 邱海龙 于 2020-07-16 设计创作，主要内容包括：本发明公开了一种活性染料色泣牢度提升剂及其制备方法和应用。本发明包括组分A 50-70份和组分B 30-50份；组分A包括丙烯酰胺10-30份,尿素5-10份,甲基丙烯酸10-30份,硬脂酸5-15份,多乙烯多胺10-40份,蒸馏水10-30份,氯化铵5-15份,引发剂0.5-2份；组分B包括非离子表面活性剂5-10份,聚季铵盐20-30份,蒸馏水40-80份,酸化剂1-5份；本发明还给出了上述色泣牢度提升剂的制备方法和应用。本发明使染料牢牢地固定在织物表面,有效避免了金属离子对色泣牢度的不良影响,大幅度降低了水的表面张力,使得活性染料在织物上的分布更加均匀,染色效果好,使用性能佳,性价比高。(The invention discloses a reactive dye color fastness improver and a preparation method and application thereof. The invention comprises 50-70 parts of component A and 30-50 parts of component B; the component A comprises 10-30 parts of acrylamide, 5-10 parts of urea, 10-30 parts of methacrylic acid, 5-15 parts of stearic acid, 10-40 parts of polyethylene polyamine, 10-30 parts of distilled water, 5-15 parts of ammonium chloride and 0.5-2 parts of an initiator; the component B comprises 5-10 parts of nonionic surfactant, 20-30 parts of polyquaternium, 40-80 parts of distilled water and 1-5 parts of acidifying agent; the invention also provides a preparation method and application of the color fastness improver. The invention firmly fixes the dye on the surface of the fabric, effectively avoids the adverse effect of metal ions on color fastness, greatly reduces the surface tension of water, and ensures that the reactive dye is more uniformly distributed on the fabric, the dyeing effect is good, the service performance is good, and the cost performance is high.)

1. The color fastness improver of the reactive dye is characterized by comprising the following components in parts by weight:

50-70 parts of a component A;

30-50 parts of a component B;

the component A comprises the following components in parts by weight:

10-30 parts of acrylamide, 5-10 parts of urea, 10-30 parts of methacrylic acid, 5-15 parts of stearic acid, 10-40 parts of polyethylene polyamine, 10-30 parts of distilled water, 5-15 parts of ammonium chloride and 0.5-2 parts of an initiator;

the component B comprises the following components in parts by weight:

5-10 parts of nonionic surfactant, 20-30 parts of polyquaternium, 40-80 parts of distilled water and 1-5 parts of acidifier.

2. A reactive dye color fastness enhancing agent according to claim 1, characterized in that:

the polyethylene polyamine is any one of diethylenetriamine and tetraethylenepentamine.

3. A reactive dye color fastness enhancing agent according to claim 1, characterized in that:

the initiator is potassium persulfate and sodium bisulfite, the potassium persulfate is prepared into an aqueous solution with the mass concentration of 1-2%, and the sodium bisulfite is prepared into an aqueous solution with the mass concentration of 1-2%.

4. A reactive dye color fastness enhancing agent according to claim 1, characterized in that:

the non-ionic surfactant is one or more of AEO-9, peregal O-25, AEO-15 and penetrant JFC.

5. A reactive dye color fastness enhancing agent according to claim 1, characterized in that:

the polyquaternium is one or more of polyquaternium-6, polyquaternium-7 and polyquaternium-10.

6. A reactive dye color fastness enhancing agent according to claim 1, characterized in that:

the acidifying agent is one or more of citric acid, acetic acid and formic acid.

7. A process for the preparation of a reactive dye color fastness enhancing agent according to any of claims 1 to 6, characterized in that it comprises the following steps:

preparation of S1 component A

1) Taking stearic acid, stirring, heating to 70-80 ℃, and preserving heat to completely melt the stearic acid into liquid to obtain a stearic acid solution;

2) taking ammonium chloride, adding part of distilled water to obtain an ammonium chloride aqueous solution, heating the stearic acid solution obtained in the step 1) to 80-85 ℃, simultaneously dripping polyethylene polyamine and the ammonium chloride aqueous solution into the stearic acid solution for 50-100min, heating to 90-95 ℃, preserving heat for 3-4h, and cooling to 60-65 ℃ to obtain a mixed solution;

3) adding acrylamide, urea and methacrylic acid into the mixed solution obtained in the step 2), heating to 70-75 ℃, dropwise adding an initiator for 2-3h, keeping the temperature at 80-82 ℃ for 2-4h, cooling to 30-40 ℃, adding the rest distilled water, stopping stirring, and discharging to obtain a component A;

preparation of S2 component B

4) Mixing nonionic surfactant, polyquaternium and distilled water, heating to 70-80 deg.C, stirring to obtain primary mixture;

5) adding an acidifying agent into the primary mixture obtained in the step 4), uniformly stirring, and discharging to obtain a component B;

preparation of S3 color fastness promoting agent

6) And (4) taking the component A obtained in the step S1, stirring, heating to the temperature of 40-50 ℃, adding the component B obtained in the step S2, and uniformly mixing to obtain the color fastness improver.

8. Method for the preparation of a reactive dye color fastness enhancing agent according to claim 7, characterized in that:

in the step 2), the mass concentration of the ammonium chloride aqueous solution is 20-40%.

9. Use of a reactive dye color fastness enhancing agent according to any of claims 1 to 6, characterized in that it comprises the following steps:

A. taking a color fastness improving agent and water, adding the color fastness improving agent into the water, and preparing a working solution with the concentration of 1.0-2.0% o.w.f;

B. b, taking the dyed cloth, washing with water, soaping, neutralizing, soaking in the working solution obtained in the step A at the soaking temperature of 40-50 ℃ for 20-30min at a soaking bath ratio of 1:10, taking out, and dehydrating to obtain the dyed cloth;

C. and D, drying the dyed cloth obtained in the step B at the temperature of below 120 ℃ to obtain a finished product.

10. Use of a reactive dye color fastness enhancing agent according to any of claims 1 to 6, characterized in that it comprises the following steps:

a. taking a color fastness improver and water, adding the color fastness improver into the water to obtain a working solution, wherein the mass concentration of the color fastness improver in the working solution is 10-20 g/L;

b. b, taking dyed cloth, washing with water, soaping, neutralizing, and dipping and rolling in the working solution obtained in the step a to obtain the dyed cloth;

c. and (c) pre-drying the dyed cloth obtained in the step (b) for 3-4min at 50-60 ℃, and baking for 60-90s at 140-150 ℃ to obtain a finished product.

Technical Field

The invention belongs to the technical field of textile auxiliary agents, and particularly relates to a reactive dye color fastness improver as well as a preparation method and application thereof.

Background

The reactive dye is a reactive dye which is popular with printing and dyeing enterprises. At present, the reactive dye replaces most direct dyes, sulfur dyes and partial vat dyes, and becomes the most important dye for cotton. With the continuous upgrading of the consumption level of people, consumers put more and more requirements on the dyeing of reactive dyes. Reactive dyes have numerous advantages, such as: the advantages of bright color, complete chromatogram, economic process, simple operation, good level-dyeing property and lower price are accelerating the large-scale application of the reactive dye.

With the rapid development of textile production technology, the quality requirement of textile products is higher and higher, and the color fastness directly relates to the health safety of human bodies and the appearance quality of fabrics, and is particularly concerned by people. Color fastness is one of the color fastnesses, also called color migration fastness or bleeding fastness, and refers to the migration staining of dyes or residual floats on fabrics, which mainly reflects the degree of staining of the fabrics after washing or rain, which causes the dyes to dissolve out at the dyeing and migrate to a white or light-colored base fabric.

At present, the color fastness of the reactive dye is poor, and no special treatment agent for improving the color fastness of the reactive dye exists, so that the dye at the dyed part of the fabric dyed by the reactive dye is easy to dissolve out and transfer to a white base or a light-colored base fabric after the fabric is washed or is drenched, thereby affecting the dyeing effect of the reactive dye, causing customer dissatisfaction and reducing the market competitiveness of the fabric.

Disclosure of Invention

The invention aims to provide a reactive dye color fastness promoting agent, a preparation method and an application thereof, and aims to solve the problem that in the prior art, the color fastness difference of fabric dyed by a reactive dye causes the dye at the dyed part of the fabric to be dissolved out after washing or being rained, and the dye is transferred to a white bottom or a light-colored base fabric, so that the dyeing effect of the fabric is influenced.

In order to solve the technical problems, the invention is mainly realized by the following technical scheme:

in one aspect, the color fastness improving agent of the reactive dye comprises the following components in parts by weight: 50-70 parts of a component A; 30-50 parts of a component B; the component A comprises the following components in parts by weight: 10-30 parts of acrylamide, 5-10 parts of urea, 10-30 parts of methacrylic acid, 5-15 parts of stearic acid, 10-40 parts of polyethylene polyamine, 10-30 parts of distilled water, 5-15 parts of ammonium chloride and 0.5-2 parts of an initiator; the component B comprises the following components in parts by weight: 5-10 parts of nonionic surfactant, 20-30 parts of polyquaternium, 40-80 parts of distilled water and 1-5 parts of acidifier.

In the color fastness improver, the component A has strong cationic groups, and the strong cationic groups can form coulomb attraction with active dye floating on the surface of the fabric to firmly fix the dye on the surface of the fabric; methacrylic acid, acrylamide and stearic acid in the component A can introduce a structure of chelating metal ions on a polymer molecular chain, so that the water-resistant capability of the reactive dye dyed cloth sample is obviously improved, and the adverse effect of the metal ions on color fastness is effectively avoided; the urea mainly plays a role in dissolving aid, and the urea can remarkably improve the storage stability of the color fastness improver at high temperature in summer and low temperature in winter; the polyethylene polyamine and stearic acid are subjected to amidation reaction to form amine stearate, and the amine stearate is an important substance for forming cationic groups under an acidic condition; in addition, the ammonium stearate salt has certain flexibility, so that the processed textile has soft hand feeling, and the ammonium chloride is weakly acidic in water and can create a weakly acidic buffer system for the component A. The nonionic surfactant in the component B not only greatly reduces the surface tension of water, but also enables the color fastness improver to be distributed more uniformly on the fabric, and effectively improves the stability of the performance of the color fastness improver; the acidifying agent in the component B effectively improves the positive charge density of the color fastness improver, greatly reduces the dosage of the color fastness improver, and improves the cost performance of the color fastness improver; the polyquaternium is a cationic copolymer, has high charge density, has positive charge property not influenced by pH value in the environment, has synergistic effect on the component A, and can obviously improve the application effect of the color fastness improver under neutral and weak alkali conditions. The color fastness improver of the reactive dye, particularly the color fastness improver of the reactive dye for cotton, has good service performance, remarkably improves the color fastness of the fabric dyed by the reactive dye, ensures that the dye at the dyed part of the fabric dyed by the reactive dye does not dissolve out and transfer to a white bottom or a light-colored bottom cloth after the fabric is washed or is drenched, improves the dyeing effect of the reactive dye, has good use effect and has excellent market competitiveness. According to the invention, the component A and the component B are compounded, so that a larger synergistic effect can be exerted, and the improvement effect of the color fastness improver is more prominent; the cotton active dye color fastness improving agent is particularly suitable for dark dyed cloth (o.w.f is more than or equal to 5%) and printed cloth, can obviously improve the color fastness of dark fabrics with bright red, bright blue, active black and the like, and has strong popularization significance for the wide printing and dyeing industry.

In a preferred embodiment, the polyethylene polyamine is any one of diethylenetriamine and tetraethylenepentamine. The polyethylene polyamine can be diethylenetriamine or tetraethylenepentamine, and the polyethylene polyamine and stearic acid are subjected to amidation reaction to form stearic acid amine salt; amine stearate is an important substance which forms a cationic group under an acidic condition; in addition, the amine stearate also has certain softness, so that the processed textile has soft hand feeling; moreover, the raw materials of diethylenetriamine and tetraethylenepentamine are easy to obtain and the price is lower.

In a preferred embodiment, the initiators are potassium persulfate and sodium bisulfite, the potassium persulfate is prepared into an aqueous solution with a mass concentration of 1-2%, and the sodium bisulfite is prepared into an aqueous solution with a mass concentration of 1-2%. The initiator is used for initiating the self-polymerization and copolymerization reaction of acrylamide and methacrylic acid, the initiator is composed of potassium persulfate and sodium bisulfite, the aqueous solution of the sodium bisulfite is taken as a substrate, and the aqueous solution of the potassium persulfate is used for initiating the polymerization reaction.

As a preferred embodiment, the non-ionic surfactant is any one or more of AEO-9, peregal O-25, AEO-15 and penetrant JFC. The nonionic surfactants have wide sources, convenient use and good performance, reduce the surface tension of water and ensure that the reactive dye is more uniform and stable on the surface of the fabric; in addition, the nonionic surfactant has lower foaming than anionic surfactants and is excellent in compatibility with cationic substances.

As a preferred embodiment, the polyquaternium is any one or more of polyquaternium-6, polyquaternium-7 and polyquaternium-10. The polyquaternium is a cationic copolymer, has high charge density, has positive charge property not influenced by pH value in the environment, has synergistic effect on the component A, and can obviously improve the application effect of the color fastness improver under neutral and weak alkali conditions.

As a preferred embodiment, the acidulant is any one or more of citric acid, acetic acid and formic acid. The acidifying agent, also called pH acidifying agent, is a pH regulator, and can regulate the pH value of the color fastness improving agent of the reactive dye, and the acidifying agent is common in production and weak acid; compared with inorganic strong acid such as hydrochloric acid, sulfuric acid and the like, the acidifying agent has less corrosivity on production and processing equipment, has less harm to workers and is convenient to use for a long time.

In another aspect, the invention provides a method for preparing a color fastness enhancer of a reactive dye, comprising the following steps: s1 preparation of component A1) taking stearic acid, stirring, heating to 70-80 ℃, and preserving heat to completely melt the stearic acid into liquid to obtain a stearic acid solution; 2) taking ammonium chloride, adding part of distilled water to obtain an ammonium chloride aqueous solution, heating the stearic acid solution obtained in the step 1) to 80-85 ℃, simultaneously dripping polyethylene polyamine and the ammonium chloride aqueous solution into the stearic acid solution for 50-100min, heating to 90-95 ℃, preserving heat for 3-4h, and cooling to 60-65 ℃ to obtain a mixed solution; 3) adding acrylamide, urea and methacrylic acid into the mixed solution obtained in the step 2), heating to 70-75 ℃, dropwise adding an initiator for 2-3h, keeping the temperature at 80-82 ℃ for 2-4h, cooling to 30-40 ℃, adding the rest distilled water, stopping stirring, and discharging to obtain a component A; s2 preparation of component B4) mixing a nonionic surfactant, polyquaternium and distilled water, heating to 70-80 ℃, and stirring to uniformly mix to obtain a primary mixture; 5) adding an acidifying agent into the primary mixture obtained in the step 4), uniformly stirring, and discharging to obtain a component B; preparation of S3 color fastness improving agent 6) taking the component A obtained in the step S1, stirring, heating to the temperature of 40-50 ℃, adding the component B obtained in the step S2, and uniformly mixing to obtain the color fastness improving agent.

The preparation method of the color fastness improver of the reactive dye comprises the steps of firstly preparing a component A and a component B respectively, and then compounding the component A and the component B to obtain the color fastness improver; the preparation method of the component A comprises the following steps of taking stearic acid as a solvent, and carrying out amidation reaction on the stearic acid and polyethylene polyamine to obtain stearic amine salt; then, under the action of an initiator, acrylamide and methacrylic acid are subjected to self-polymerization and copolymerization reaction, so that a component A is obtained; the preparation method of the component B comprises the steps of dissolving the polyquaternium and the nonionic surfactant into water at high temperature, uniformly mixing, adding a proper amount of acidifier, and maintaining the pH value of the component B at subacidity to obtain the component B; component B is primarily intended to further maintain the pH stability of the colour fastness improving agent itself and the stability of the application effect when used in different pH environments. The preparation method of the reactive dye color fastness improver has the advantages of simple operation, convenient control and easy realization of industrialization.

In a preferred embodiment, in step 2), the ammonium chloride aqueous solution has a mass concentration of 20-40%. The ammonium chloride aqueous solution is dripped into the stearic acid solution, the ammonium chloride is dissolved in water in advance to prepare a uniform solution, and the mass concentration of the ammonium chloride aqueous solution is controlled, so that the reaction speed is controlled, and the reaction is carried out stably.

In a further aspect, the invention provides a use of the color fastness enhancer for reactive dyes, which comprises the following steps: A. taking a color fastness improving agent and water, adding the color fastness improving agent into the water, and preparing a working solution with the concentration of 1.0-2.0% o.w.f; B. b, taking the dyed cloth, washing with water, soaping, neutralizing, soaking in the working solution obtained in the step A at the soaking temperature of 40-50 ℃ for 20-30min at a soaking bath ratio of 1:10, taking out, and dehydrating to obtain the dyed cloth; C. and D, drying the dyed cloth obtained in the step B at the temperature of below 120 ℃ to obtain a finished product.

When the reactive dye color fastness promoting agent is used, firstly, the color fastness promoting agent and water are prepared into working solution, then, the treated dyed cloth is soaked in the working solution, and finally, the dyed cloth is dried. The reactive dye color fastness promoting agent disclosed by the invention is directly used in the conventional fabric dyeing process, is simple to operate and convenient to use, does not add an additional process, does not need special processing equipment, has high cost performance, can quickly solve the problem which is urgently needed to be solved by a large number of printing and dyeing enterprises, effectively breaks through the technical barrier, and enables the large number of printing and dyeing enterprises to better walk away; the method is suitable for batch production, such as printing and dyeing processing of towels, yarns and knitted fabrics; in addition, the method also meets the requirements of automatic liquid preparation systems of dye materials prepared by a plurality of printing and dyeing factories, is beneficial to the fine and automatic management of the printing and dyeing factories, and can effectively avoid errors and waste caused by manual weighing and manual addition.

In a further aspect, the invention provides a use of the color fastness improving agent of the reactive dye, which comprises the following steps: a. taking a color fastness improver and water, adding the color fastness improver into the water to obtain a working solution, wherein the mass concentration of the color fastness improver in the working solution is 10-20 g/L; b. b, taking dyed cloth, washing with water, soaping, neutralizing, and dipping and rolling in the working solution obtained in the step a to obtain the dyed cloth; c. and (c) pre-drying the dyed cloth obtained in the step (b) for 3-4min at 50-60 ℃, and baking for 60-90s at 140-150 ℃ to obtain a finished product.

When the reactive dye color fastness promoting agent is used, firstly, the color fastness promoting agent and water are prepared into working solution, then, the treated dyed cloth is soaked and rolled in the working solution, and finally, the dyed cloth is pre-dried and baked; the reactive dye color fastness promoting agent can also be used in the padding dyeing process of conventional fabrics, can be directly used in the padding dyeing process, and has the advantages of simple operation, convenient use, no additional process and no need of special processing equipment; the method is suitable for continuous production, such as printing and dyeing processing of woven fabrics of home textile fabrics, shirt fabrics, trousers fabrics and the like; in addition, the method also meets the requirements of automatic liquid preparation systems of dye materials prepared by a plurality of printing and dyeing factories, is beneficial to the fine and automatic management of the printing and dyeing factories, and can effectively avoid errors and waste caused by manual weighing and manual addition.

Compared with the prior art, the invention has the beneficial effects that: in the color fastness improver, the component A has strong cationic groups, and the strong cationic groups can form coulomb attraction with active dye floating on the surface of the fabric to firmly fix the dye on the surface of the fabric; methacrylic acid, acrylamide and stearic acid in the component A can introduce a structure of chelating metal ions on a polymer molecular chain, so that the capability of the reactive dye for dyeing cloth samples to resist metal ions in water can be obviously improved, and the adverse effect of the metal ions on color fastness is effectively avoided; the nonionic surfactant in the component B not only greatly reduces the surface tension of water, but also enables the color fastness improver to be distributed more uniformly on the fabric, and effectively improves the stability of the performance of the color fastness improver; the acidifying agent in the component B effectively improves the positive charge density of the color fastness improver, greatly reduces the dosage of the color fastness improver, and improves the cost performance of the color fastness improver; the color fastness improver of the reactive dye is particularly a color fastness improver of the reactive dye for cotton, is more particularly suitable for dark dyed cloth (o.w.f is more than or equal to 5%) and printed cloth, and the component A and the component B are compounded to exert a larger synergistic effect, so that the improvement effect of the color fastness improver is more prominent, and the color fastness of dark fabrics such as active scarlet, active turquoise blue, active black and the like can be obviously improved. The preparation method of the color fastness improver is simple to operate, convenient to control and easy to realize industrialization; the color fastness promoting agent disclosed by the invention is convenient to use, does not need special processing equipment, has good washing fastness, obviously improves the color fastness of the fabric dyed by the reactive dye, ensures that the dye at the dyed part of the fabric dyed by the reactive dye does not dissolve out and transfer to white bottom or light color base cloth after the fabric is washed or is drenched by rain, improves the dyeing effect of the reactive dye, has good use effect and high cost performance, has superior market competitiveness and high cost performance, can quickly solve the problem which needs to be solved by a wide range of printing and dyeing enterprises, effectively breaks through the technical barrier, enables the wide range of printing and dyeing enterprises to better go out, and has strong popularization significance for the wide range of printing and dyeing industries.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention relates to a reactive dye color fastness improver which comprises the following components in parts by weight: 50-70 parts of component A; 30-50 parts of a component B; the component A comprises the following components in parts by weight: 10-30 parts of acrylamide, 5-10 parts of urea, 10-30 parts of methacrylic acid, 5-15 parts of stearic acid, 10-40 parts of polyethylene polyamine, 10-30 parts of distilled water, 5-15 parts of ammonium chloride and 0.5-2 parts of an initiator; the component B comprises the following components in parts by weight: 5-10 parts of nonionic surfactant, 20-30 parts of polyquaternium, 40-80 parts of distilled water and 1-5 parts of acidifier.

Preferably, the polyethylene polyamine is any one of diethylenetriamine and tetraethylenepentamine.

Further, the initiator is potassium persulfate and sodium bisulfite, the potassium persulfate is prepared into an aqueous solution with the mass concentration of 1-2%, and the sodium bisulfite is prepared into an aqueous solution with the mass concentration of 1-2%.

Specifically, the nonionic surfactant is any one or more of AEO-9, peregal O-25, AEO-15 and a penetrating agent JFC.

More preferably, the polyquaternium is any one or more of polyquaternium-6, polyquaternium-7 and polyquaternium-10.

Furthermore, the acidifying agent is any one or more of citric acid, acetic acid and formic acid.

The preparation method of the reactive dye color fastness improver comprises the following steps:

preparation of S1 component A

1) Taking stearic acid, stirring, heating to 70-80 ℃, and preserving heat to completely melt the stearic acid into liquid to obtain a stearic acid solution;

2) taking ammonium chloride, adding part of distilled water to obtain an ammonium chloride aqueous solution, heating the stearic acid solution obtained in the step 1) to 80-85 ℃, simultaneously dripping polyethylene polyamine and the ammonium chloride aqueous solution into the stearic acid solution for 50-100min, heating to 90-95 ℃, preserving heat for 3-4h, and cooling to 60-65 ℃ to obtain a mixed solution;

3) adding acrylamide, urea and methacrylic acid into the mixed solution obtained in the step 2), heating to 70-75 ℃, dropwise adding an initiator for 2-3h, keeping the temperature at 80-82 ℃ for 2-4h, cooling to 30-40 ℃, adding the rest distilled water, stopping stirring, and discharging to obtain a component A;

preparation of S2 component B

4) Mixing nonionic surfactant, polyquaternium and distilled water, heating to 70-80 deg.C, stirring to obtain primary mixture;

5) adding an acidifying agent into the primary mixture obtained in the step 4), uniformly stirring, and discharging to obtain a component B;

preparation of S3 color fastness promoting agent

6) And (4) taking the component A obtained in the step S1, stirring, heating to the temperature of 40-50 ℃, adding the component B obtained in the step S2, and uniformly mixing to obtain the color fastness improver.

Preferably, in the step 2), the mass concentration of the ammonium chloride aqueous solution is 20-40%.

The application of the color fastness improver of the reactive dye comprises the following steps:

A. taking a color fastness improving agent and water, adding the color fastness improving agent into the water, and preparing a working solution with the concentration of 1.0-2.0% o.w.f;

B. b, taking the dyed cloth, washing with water, soaping, neutralizing, soaking in the working solution obtained in the step A at the soaking temperature of 40-50 ℃ for 20-30min at a soaking bath ratio of 1:10, taking out, and dehydrating to obtain the dyed cloth;

C. and D, drying the dyed cloth obtained in the step B at the temperature of below 120 ℃ to obtain a finished product.

The application of the color fastness improver of the reactive dye comprises the following steps:

a. taking a color fastness improver and water, adding the color fastness improver into the water to obtain a working solution, wherein the mass concentration of the color fastness improver in the working solution is 10-20 g/L;

b. b, taking dyed cloth, washing with water, soaping, neutralizing, and dipping and rolling in the working solution obtained in the step a to obtain the dyed cloth;

c. and (c) pre-drying the dyed cloth obtained in the step (b) for 3-4min at 50-60 ℃, and baking for 60-90s at 140-150 ℃ to obtain a finished product.