Dyeing accelerating starch auxiliary agent and application method of auxiliary agent in dyeing

Abstract

The invention discloses a dyeing accelerating starch auxiliary agent, which is a powder coupling agent, and comprises the following components: CH3COOK, CH3COONa, K2CO3, Na2CO3, NaCl, KCl, EDTA (Ethylene Diamine Tetraacetic Acid) and starch, according to the application method of the accelerating starch additive in dyeing, the accelerating starch additive is divided into a light color system, a medium color system and a dark color system in machine cylinder production, and the dyeing process is as follows: the dyeing temperature is 60 + / -5 DEG C, the accelerating starch additive is 1-2g / L, the anhydrous sodium sulphate is 15-70g / L, and the bath ratio is 1: (5-10); the accelerating starch additive is used for replacing sodium carbonate, has retarding property superior to that of the sodium carbonate, is easy to circulate to achieve a level dyeing effect, and can shorten the dyeing time; the bath ratio is properly reduced, the dye effect and the dyeing uniformity can be improved, the dye is added in a slow-first and fast-second mode in machine cylinder production, sensitive colors are added in two times, and specially sensitive colors or colors difficult to control are added in three times; when the dyeing promoter is used for dyeing and color yield is too light, the use amount of anhydrous sodium sulphate can be properly increased or the heat preservation time can be prolonged, or sodium carbonate can be pre-added before the dye is added.

Description

Technical Field

[0001] The invention belongs to the technical field of dyeing and printing with dyeing accelerator auxiliaries, and specifically relates to a dyeing accelerator starch auxiliaries and an application method of the auxiliaries in dyeing. Background Art

[0002] The dyeing methods of textile fabrics, such as knitted and woven fabrics, yarns and filaments, generally use acid, disperse, reactive dyes and blended dyes. In order to achieve the depth and color fastness of dyeing, it is often necessary to use sodium sulfate, alkaline auxiliaries and flake caustic soda or soda ash. Because the hydrolysis of reactive dyes is related to temperature and alkalinity, the higher the temperature and the stronger the alkalinity, the faster the hydrolysis and the worse the color fixation rate. The more serious the hydrolysis of the dye, the lower the color fixation rate and the greater the color change. If dyeing is dark, the salt concentration in the dye bath is low and the dye adsorption is insufficient, which will lead to low color yield, uneven dyeing, and uneven dyeing on the cloth.

[0003] In the prior art, when reactive dyes are used to dye the above fabrics, the auxiliary agents used are sodium sulfate, soda ash and caustic soda, wherein sodium sulfate is used to promote the absorption of dyes to dye fibers and improve the color yield of dyes; soda ash is used to adjust the pH value of the dye solution and promote color fixation; caustic soda is used to destroy the negative charge on the fiber and reduce the obstacle of the fiber to reactive dye dyeing; the process flow requires first adding soda ash to the dye vat, adjusting the pH value, and then gradually adding caustic soda, then heating and dyeing, and after dyeing, neutralizing the caustic soda washing water. The caustic soda added in this method has a high pH value during dyeing and a fast coloring speed. The dye is easily hydrolyzed and the fabric produces color flowers during the dyeing process. After dyeing, glacial acetic acid needs to be added for neutralization. The inorganic salt printing and dyeing wastewater produced seriously pollutes the environment. Therefore, it is necessary to invent an auxiliary agent and a printing and dyeing method that can replace caustic soda.

[0004] Therefore, how to reduce the amount of alkaline auxiliary agents used in the dyeing process or replace the alkaline auxiliary caustic soda and achieve the same dyeing depth effect has become an urgent problem to be solved in the current printing and dyeing industry. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a dyeing-promoting starch auxiliary agent and an application method of the auxiliary agent in dyeing. The dyeing-promoting starch auxiliary agent is used to replace soda ash and caustic soda, so that it is easy to circulate and achieve a uniform dyeing effect; the bath ratio is appropriately reduced, the amount of sodium sulfate is increased or the insulation time is extended, or sodium carbonate can be pre-added before adding the dye, and the addition is added in batches, first slowly and then quickly, which can improve the dyeing effect and dyeing uniformity.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A dyeing-promoting starch auxiliary agent is a powdery coupling agent, and its pH value is 11.5±1.0 under the condition of 1% aqueous solution; the dyeing-promoting starch auxiliary agent is soluble in water at a temperature above 40°C.

[0008] A further dyeing-promoting starch auxiliary agent, the ingredients of which include the following: CH3COOK, CH3COONa, K2CO3, Na2CO3, NaCl, KCl, EDTA and starch;

[0009] Wherein, the dyeing-promoting starch auxiliary agent includes at least one of CH3COOK and CH3COONa;

[0010] Wherein, the dyeing-promoting starch auxiliary agent includes at least one of K2CO3 and Na2CO3;

[0011] Wherein, the dyeing-promoting starch auxiliary agent comprises at least one of NaCl and KCl;

[0012] The dyeing-accelerating starch auxiliary agent comprises EDTA, and the rest is starch.

[0013] A method for applying a dyeing-accelerating starch auxiliary agent in dyeing, comprising the dyeing-accelerating starch auxiliary agent described above;

[0014] In the production of the machine cylinder, the dyeing objects are divided into light color series, medium color series and dark color series. The dyeing process is as follows:

[0015] Light color series: dyeing temperature 60℃±5℃, dyeing-promoting starch auxiliary 1~2g / L, sodium sulfate: (15~30)g / L, bath ratio 1:5~10;

[0016] Medium color system: dyeing temperature 60℃±5℃, dyeing-promoting starch auxiliary 1~2.5g / L, sodium sulfate: (25~50)g / L, bath ratio 1:5~10;

[0017] Dark color series: dyeing temperature 60℃±5℃, dyeing-promoting starch auxiliary 2~4g / L, glauber powder: (35~70)g / L, bath ratio 1:5~8.

[0018] 4. An application method according to claim 3, characterized in that it includes dyeing with a dye-promoting starch auxiliary agent in combination with other dyes, including the following steps: 1. Feeding cloth, first adding water and then feeding cloth, running for 5 to 10 minutes, the temperature in the cylinder when feeding cloth is room temperature 40°C, adding water 2 to 3 minutes before feeding cloth: the temperature in the cylinder is 30 to 40°C, and the feeding of cloth is completed. 2. When dyeing, add water, dye and sodium sulfate to the dye vat, pre-dissolve at room temperature for about 10 minutes, and then add 1-4g / L of starch auxiliaries to promote dyeing; 3. After adding the dye auxiliaries according to the formula ratio, run for 15 minutes, start heating, and the temperature rises to 60℃±5℃. The dyeing insulation time is 40-60min; 4. After the insulation is completed, cut the board to check the color. After the color meets the dyeing requirements, wash with water, and the circulating washing time is 10-15min; 5. Drainage and post-treatment, add glacial acetic acid to the water after drainage, neutralize the pH in the vat to neutral, temperature 30-40℃, neutralize for 5-10min, drain and wash with water; 6. Soaping agent 2g / L, temperature 80-95℃ soaping for 15min, cool down and add water, wash with water for 20min and discharge the cloth.

[0019] In a further application method, the dyeing-promoting starch auxiliary is added in batches in a slow manner first and then in a fast manner.

[0020] In a further application method, for sensitive colors, add twice, the first time adding 1 / 4 of the total amount, and the second time adding the remaining amount.

[0021] In a further application method, particularly sensitive colors or colors that are difficult to control can be added in three portions, in the order of 1 / 6, 2 / 6, and 3 / 6.

[0022] In a further application method, when the dyeing-promoting starch auxiliary is used in the dyeing process to dye medium and dark cloth with slightly lighter color retention, 0.5-2g / L of sodium carbonate is added before the dye is put into the tank.

[0023] In a further application method, when the color of dyeing by the dyeing-promoting starch auxiliary is too light, the dosage of sodium sulfate can be increased to 15-70g / L.

[0024] In a further application method, when the dyeing starch auxiliary agent prints and dyes the color too light, the dyeing time is extended by 15-30 minutes.

[0025] The beneficial effects of the present invention are as follows: the dye-accelerating starch auxiliary agent is used to replace soda ash and caustic soda, and the pH value is very stable, and it has a slow dyeing property that is better than that of soda ash, excellent dyeing repeatability, and no batch difference or cylinder difference. After the powdered dye-accelerating starch is added, the dye liquor can be kept in liquid form, so that it is easy to circulate and achieve a uniform dyeing effect, thereby improving the dyeing fastness; the amount of soda ash used is large, and one kilogram of dye-accelerating starch can replace ten kilograms of soda ash. The use of the dye-accelerating starch is simple to operate and convenient to store in the factory. There is no problem that the dye liquor becomes thicker and is not easy to circulate after the addition of soda ash, and the dyeing time can be shortened.

[0026] Using dyeing-promoting starch additives and appropriately reducing the bath ratio to increase the dye concentration and fiber activity in the dye solution can improve the dyeing effect and dyeing uniformity. In the machine cylinder production, the dyeing-promoting starch additives are added in a slow and then fast manner. For sensitive colors, they are added twice, and for particularly sensitive colors or colors that are difficult to control, they can be added three times. When the dyeing auxiliaries print and dye the color too light, the amount of sodium sulfate can be appropriately increased or the insulation time can be extended. For example, sodium carbonate can be pre-added before adding the dye, which basically solves the problem of slightly lighter color in medium and dark colors. DETAILED DESCRIPTION

[0027] Below, a dyeing-promoting starch auxiliary agent and an application method of the auxiliary agent in dyeing according to the present disclosure are described in detail; in order to make the purpose, technical scheme and advantages of the present utility model clearer, the technical scheme in the embodiment of the present disclosure will be clearly and completely described below in combination with the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments.

[0028] Therefore, the following detailed description of the embodiments of the present disclosure is not intended to limit the scope of the present disclosure claimed for protection, but merely represents selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0029] Unless otherwise defined in the context, the singular includes the plural. Throughout the specification, the terms "comprising", "having", etc. are used herein to specify the presence of the features, numbers, steps, operations, elements, parts or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, parts or combinations thereof.

[0030] In addition, even though terms including ordinal numbers such as "first," "second," etc. may be used to describe various components, these components are not limited by these terms, and these terms are only used to distinguish one element from other elements. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component without departing from the scope of the present disclosure.

[0031] In the description of the present invention, it is necessary to understand that the terms "up", "down", "left", "right", "front", "back", etc. are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0032] The present invention discloses a dyeing-promoting starch auxiliary agent, which is a powder coupling agent, has the appearance of white powder / granules, is a non-ionic, buffered organic substance, and is a strong base, and its components include: CH3COOK, CH3COONa, K2CO3, Na2CO3, NaCl, KCl, EDTA and starch;

[0033] Wherein, the dyeing-promoting starch auxiliary agent includes at least one of CH3COOK and CH3COONa;

[0034] Wherein, the dyeing-promoting starch auxiliary agent includes at least one of K2CO3 and Na2CO3;

[0035] Wherein, the dyeing-promoting starch auxiliary agent comprises at least one of NaCl and KCl;

[0036] The dyeing-promoting starch auxiliary agent comprises EDTA, and the rest is starch, and the starch is one or more of corn starch, potato starch, sweet potato starch, cassava starch and the like.

[0037] The dyeing-promoting starch auxiliary agent is easily soluble in cold water and can be directly added to a dye vat with a water temperature above 40°C. Its pH value under the condition of 1% aqueous solution is 11.5±1.0. It is used to replace soda ash and caustic soda. The pH value is very stable, and it has a slow dyeing property that is better than soda ash, excellent dyeing repeatability, and no batch difference or vat difference. After the powder substitute alkali is added, the dye liquor can be kept in liquid form, making it easy to circulate and achieving a uniform dyeing effect. There is no problem of the dye liquor becoming thicker and difficult to circulate after the addition of soda ash, and the dyeing time can be shortened.

[0038] Although it can be directly put into the dyeing tank, in order to ensure the accuracy of the amount used in dyeing, it is necessary to prepare the auxiliary solution. The steps are: a. Add starch, K2CO3, Na2CO 3、 CH3COOK and CH3COONa, stir evenly, add water, stir evenly; then add sodium hypochlorite for disinfection and mature for 1 hour; b. Add EDTA, KCl, NaCl, and then add water, stir for 30 minutes, and adjust to an auxiliary agent solution with a solubility of 1-4g / L.

[0039] The application method of the dyeing-promoting starch auxiliary agent in dyeing, in the cylinder production, is divided into light color series, medium color series and dark color series according to the dyeing object, and the dyeing process is as follows:

[0040] Light color series: dyeing temperature 60℃±5℃, dyeing-promoting starch auxiliary 1~2g / L, sodium sulfate: (15~30)g / L, bath ratio 1:5~8;

[0041] Medium color system: dyeing temperature 60℃±5℃, dyeing-promoting starch auxiliary 1~2.5g / L, sodium sulfate: (25~50)g / L, bath ratio 1:5~8;

[0042] Dark color series: dyeing temperature 60℃±5℃, dyeing-promoting starch auxiliary 2~4g / L, sodium sulfate: (35~70)g / L, bath ratio 1:5~8;

[0043] For light-colored dyeing objects, since the target color depth is relatively light, it is necessary to control the amount of dye and bath ratio to avoid over-dark dyeing; at this time, the amount of dye-promoting starch additives and sodium sulfate can be appropriately increased to improve the color yield and dyeing uniformity of the dye, while maintaining a low bath ratio to control the dye concentration;

[0044] For medium-color dyeing objects, it is necessary to balance the relationship between the amount of dye, bath ratio and the amount of dyeing auxiliaries. The amount of dye, sodium sulfate and dyeing auxiliaries can be appropriately increased, and the bath ratio can be adjusted to obtain a moderate dye concentration and dyeing uniformity;

[0045] For dark-colored dyeing objects, it is necessary to pursue higher dye color yield, dyeing depth and fastness. At this time, the amount of dye, sodium sulfate and dyeing-promoting starch auxiliaries can be further increased, and the bath ratio can be appropriately reduced to increase the dye concentration and fiber activity in the dye solution. However, it is necessary to pay attention to controlling the balance between the amount of dye and the bath ratio to avoid the problem of over-darkness or uneven dyeing.

[0046] Sodium sulfate can reduce the solubility of dyes in water, promote the combination of dyes and fibers, thereby increasing the dye uptake rate and dyeing speed.

[0047] In a specific embodiment, the dyeing is carried out by using the dyeing-promoting starch auxiliary agent in combination with other dyes, including the following steps: 1. Adding cloth, first adding water and then adding cloth, running for 5 to 10 minutes, the temperature in the cylinder is room temperature 40°C when the cloth is added, and water is added 2 to 3 minutes before the cloth is added: the temperature in the cylinder is 30 to 40°C, the larger the cylinder, the faster the cloth speed is required, and the smaller the cylinder, the slower the cloth speed is required. When the dyeing cylinder is larger, it can accommodate more cloth for simultaneous processing. In order to maintain the consistency and efficiency of dyeing, to ensure that the cloth is evenly and quickly dyed in the cylinder, a faster cloth speed helps to reduce the dyeing time and improve production efficiency; in contrast, the capacity of a small cylinder is limited and can only process a small amount of cloth. In order to obtain a good dyeing effect, it is necessary to reduce the cloth speed so that the cloth has enough time in the cylinder for sufficient dyeing treatment, and a slower cloth speed helps to ensure that the cloth 1. When dyeing, add water to the dye vat, add dye and 15-70g / L sodium sulfate, pre-dissolve at room temperature for about 10 minutes, and then add 0.5-2g / L dyeing-promoting starch additive; 2. After adding the dye additives according to the formula ratio, run for 15 minutes, start heating, the temperature rises to 60℃±5℃, and the dyeing insulation time is 40-60min; 3. After the insulation is over, cut the board to check the color. After the color meets the dyeing requirements, wash with water, and the circulating washing time is 10-15min; 4. Drainage and post-treatment, add glacial acetic acid to the water after drainage, neutralize the pH in the vat to neutral, temperature 30-40℃, neutralize for 5-10min, drain and wash with water; 5. Soaping agent 2g / L, temperature 80-95℃, soap washing for 15 minutes, cool down and enter water, wash with water for 20min and discharge the cloth.

[0048] When the color obtained by dyeing with starch additives is too light, the dosage of sodium sulphate can be increased to 70g / L, or the dyeing time can be extended by about 15-30min.

[0049] In a further embodiment, when dyeing medium and dark cloths using a dyeing-promoting starch auxiliary in a dyeing process, 1-4 g / L of sodium carbonate is added before the dye is put into the vat.

[0050] In a further embodiment, the dyeing-promoting starch auxiliary agent is added in a slow-first-faster-later manner. For sensitive colors, it is added in two times, with 1 / 4 of the total amount added in the first time and the remaining amount added in the second time. For particularly sensitive colors or colors that are difficult to control, it can be added in three times, in the order of 1 / 6, 2 / 6, and 3 / 6.

[0051] The advantages of adding slowly at first and then quickly are: slow addition in the initial stage: in the early stage of dyeing, the dye and auxiliaries have not yet been completely combined with the fiber. At this time, slow addition of auxiliaries can avoid uneven dyeing or dye coagulation caused by excessive auxiliaries; fast addition in the subsequent stage: as the dyeing process proceeds, the fiber's adsorption capacity for dyes gradually increases. At this time, fast addition of auxiliaries can accelerate dyeing and improve dyeing efficiency.

[0052] The advantage of adding in batches is that for sensitive colors like turquoise blue, grass green, bean paste, etc.: adding in two batches can avoid adding too much auxiliary agent at one time, which may cause the dyeing to fix too quickly or color deviation. The first addition of 1 / 4 of the total amount can preliminarily establish the dyeing conditions; the second addition of the remaining amount can further deepen the color and reach the target color depth; for particularly sensitive colors or colors that are difficult to control: adding in three batches can more finely control the dyeing process. The first addition of 1 / 6 of the amount lays the foundation for subsequent dyeing; the second addition of 2 / 6 of the amount can further adjust the color; the third addition of the remaining amount can ensure that the target color depth is reached and the dyeing effect is stabilized.

[0053] The present invention is described in detail below with reference to specific embodiments.

[0054] Example 1

[0055] Dyeing fabric into light beige includes the following steps: 1. Adding cloth, first adding water and then adding cloth, running for 10 minutes, the temperature in the vat is room temperature 40°C when the cloth is added, adding water 3 minutes before the cloth is added: the temperature in the vat is 40°C, and the cloth is added; 2. When dyeing, add water, dye and sodium sulfate to the dye vat, pre-dissolve at room temperature for 10 minutes, and then add 1g / L dyeing-promoting starch auxiliary D-6 from Shaoxing Jiyu Chemical Technology Co., Ltd.; 3. After adding the dye auxiliary according to the formula ratio, run for 15 minutes , start heating up, the temperature rises to 60℃, and the dyeing insulation time is 50min; 4. After the insulation is over, cut the board to check the color. After the color meets the dyeing requirements, wash with water, and the circulating washing time is 13min; 5. Drainage and post-treatment, add 1g / L glacial acetic acid to the water after drainage, and neutralize the pH in the tank to neutral, the temperature is 40℃, neutralization for 10min, drain the water and wash with soap; 6. Soap detergent 2g / L, temperature 90℃, soap washing for 15 minutes, cool down and enter water, wash with water for 20min and discharge the cloth.

[0056] Example 2

[0057] Compared with Example 1, other process conditions are the same, except that the fabric is dyed into yellow in the medium color system.

[0058] Example 3

[0059] Compared with Example 2, other process conditions are the same, except that 2 g / L of sodium carbonate is added before the dye is put into the tank.

[0060] Example 4

[0061] Compared with Example 1, other process conditions are the same, except that the fabric is dyed into a particularly sensitive color, turquoise blue.

[0062] Example 5

[0063] Compared with Example 4, other process conditions are the same, except that the dyeing-accelerating starch auxiliary agent D-6 is added in three times, in the order of 1 / 6, 2 / 6, and 3 / 6.

[0064] Example 6

[0065] Compared with Comparative Example 1, other process conditions are the same, except that the dyeing time is increased to 50 min.

[0066] Example 7

[0067] Compared with Example 3, other process conditions are the same, except that the fabric is dyed into dark blue in the dark color series.

[0068] Example 8

[0069] Compared with Example 7, other process conditions are the same, except that 4 g / L of sodium carbonate is added before the dye is put into the tank.

[0070] Example 9

[0071] Compared with Example 2, other process conditions are the same, except that 2 g / L of sodium carbonate is added before the dye is put into the vat, and the dyeing-promoting starch auxiliary agent D-6 is added three times, in the order of 1 / 6, 2 / 6, and 3 / 6, and the dyeing time is increased to 50 min.

[0072] Comparative Example 1

[0073] Compared with Example 1, other process conditions are the same, except that the amount of sodium sulfate used is 2 g / L.

[0074] Comparative Example 2

[0075] Compared with Comparative Example 1, other process conditions are the same, except that no dyeing-promoting starch auxiliary agent is added.

[0076] Performance Test 1: According to the dyeing process described in Examples 1-9 and Comparative Examples 1 and 2, 20 pieces of the same dyed fabrics were dyed, dried, and then compared with the color chart. The fabrics were scored according to the color brightness and brightness in four grades: excellent, good, medium, and poor. The excellent one was above 80 points, the good one was 70-79 points, the medium one was 60-69 points, and the poor one was below 59 points.

[0077] Performance Test 2: According to the dyeing process described in Examples 1-9 and Comparative Examples 1 and 2, the same 20 pieces of dyed fabrics were dyed and dried, and the dyeing uniformity was visually inspected. The dyeing uniformity was scored in four grades: excellent, good, medium and poor. The excellent score was above 80 points, the good score was 70-79 points, the medium score was 60-69 points, and the poor score was below 59 points. The average calculation results are shown in Table 1 below. The colors of the fabrics in Examples 1-9 and Comparative Examples 1 and 2 are shown in Table 2 below.

[0078]

[0079] Table 1

[0080]

[0081] Table 2

[0082] in conclusion

[0083] Compared with comparative example 1, embodiment 1 of the present invention is different in that the amount of sodium sulfate used is increased. When the color obtained by dyeing with the dyeing accelerator starch auxiliary is too light, the amount of sodium sulfate is increased. The sodium sulfate can reduce the solubility of the dye in water, promote the combination of the dye and the fiber, thereby increasing the dye uptake rate of the dye and improving the dyeing speed of the dye. It can be used as a dyeing accelerator for dyeing cotton fibers with direct dyes, sulfur dyes, vat dyes, reactive dyes and soluble vat dyes, and a more uniform dyeing effect can be achieved by adjusting the dyeing speed of the dye on the fiber.

[0084] Compared with Comparative Example 1, other process conditions are the same as in Comparative Example 2, except that no dyeing-promoting starch auxiliary is added. The data show that the dyeing effect and dyeing uniformity are poor.

[0085] Compared with Example 1, Example 2 is different in that the fabric is dyed yellow in the middle color system, and the dye effect and dyeing uniformity are reduced.

[0086] Compared with Example 2, Example 3 is different in that 2g / L of sodium carbonate is added before the dye is put into the cylinder. Sodium carbonate can make the dyeing liquid in a better pH range, thereby improving the coloring rate and affinity of the dye; when the dye molecules are too large, it is difficult to directly penetrate into the fiber, and it needs to go through the process of dispersion and penetration. The addition of sodium carbonate can promote the dispersion and dissolution of the dye, making the dye molecules smaller and evenly distributed in the dyeing liquid. At the same time, sodium carbonate can also promote the penetration of dye molecules into the fiber, improve the permeability and uniformity of the dye, thereby enhancing the dyeing effect; sodium carbonate can react with the acidic groups in the dye molecules to form salts, which can enhance the adsorption and affinity between the dye and the fiber, make the dye more firmly attached to the fiber, and can improve the dyeing effect and dyeing uniformity of the dye.

[0087] Compared with Example 1, Example 4 is different from Example 1 in that the special sensitive colors are compared with the ordinary color system. The ordinary color system refers to those colors with relatively stable color and relatively conventional dyeing performance. The dyes used in the colors are usually less sensitive to dyeing conditions, so the dyeing process is relatively easy to control. Since the dyes used in the special sensitive colors are sensitive to dyeing conditions, color differences, color flowers and other problems are prone to occur during the dyeing process. Judging from the data, the dyeing effect and dyeing uniformity are not good.

[0088] Compared with Example 4, Example 5 dyes the fabric into a particularly sensitive color turquoise blue. The difference is that it is added in three times in the order of 1 / 6, 2 / 6, and 3 / 6. The first addition of 1 / 4 of the total amount can preliminarily establish the dyeing environment; the second addition of the remaining amount further deepens the color and reaches the target color depth; for particularly sensitive colors or colors that are difficult to control: adding in three times can more finely control the dyeing process. As the dyeing process proceeds, the fiber's adsorption capacity for the dye is enhanced, and the auxiliary agent can accelerate the dyeing of the dye and improve the dyeing efficiency.

[0089] Compared with Comparative Example 1, Example 6 has the same other process conditions except that the dyeing time is increased to 50 min. From the data, increasing the dyeing time can improve the dyeing effect and dyeing uniformity of the dye.

[0090] Compared with Example 3, Example 7 is different in that the fabric is dyed dark blue in the dark color system, and the fabric is dyed yellow in the medium color system, and the dye effect and dyeing uniformity are reduced.

[0091] Compared with Example 7, Example 8 is different in that 4 g / L of sodium carbonate is added before the dye is put into the tank to dye it into a dark color. Increasing the sodium carbonate to 4 g / L before the dye is put into the tank can improve the dyeing effect and dyeing uniformity of the dye.

[0092] Compared with Example 2, Example 9 is different in that 2 g / L of sodium carbonate is added before the dye is put into the tank, the dyeing-promoting starch auxiliary agent D-6 is added three times in the order of 1 / 6, 2 / 6, and 3 / 6, and the dyeing time is increased to 50 min. From the data, the dyeing effect and dyeing uniformity of the dye can be significantly improved.

[0093] In summary, the use of dyeing-promoting starch additives, and further increasing the dosage of dyeing-promoting starch additives, and appropriately reducing the bath ratio to increase the dye concentration and fiber activity in the dye solution can improve the dyeing effect and dyeing uniformity both theoretically and in actual data. In the production of the machine cylinder, the dyeing-promoting starch additives are added in a slow and then fast manner. For sensitive colors, they are added twice, 1 / 4 of the total amount is added for the first time, and the remaining amount is added for the second time. Special sensitive colors or colors that are difficult to control can be added three times in the order of 1 / 6, 2 / 6, and 3 / 6. When the dyeing-promoting additives are used to print and dye excellent colors that are too light, the dosage of sodium sulfate can be appropriately increased (increased by about 15-70g / L) or the insulation time can be extended by about 15-30min. For example, 1g / L of sodium carbonate can be pre-added before adding the dye, which basically solves the problem of slightly light color retention in medium and dark colors.

[0094] In addition, dyeing accelerators can replace soda ash to make the dye liquid liquid and improve the color fastness. The amount of soda ash used is large, and one kilogram of dyeing accelerator starch can replace ten kilograms of soda ash. The use of dyeing accelerator starch is easy to operate and convenient for factory storage. There is no problem of dyeing liquid viscosity increase and difficulty in circulation after adding soda ash; it is easily soluble in cold water and suitable for dyeing with reactive dyes at various temperatures. It can be directly added to the dyeing tank and can be used with automatic liquid feeding system and other equipment after dilution; if dyeing is wrong, the dyeing accelerator can be directly added to the same bathtub without changing a new bathtub; it avoids the phenomenon of adding soda ash to the dyeing liquid in batches to prolong the dyeing time, and can be added to the dyeing liquid at one time.

Claims

1. A starch dyeing auxiliary agent, characterized in that: The dyeing-promoting starch auxiliary agent is a powder coupling agent, and the pH value of the powder coupling agent under the condition of 1% aqueous solution is 11.5±1.0; the dyeing-promoting starch auxiliary agent is dissolved in water with a temperature above 40°C.

2. A starch dyeing auxiliary according to claim 1, characterized in that: Its ingredients include the following: CH3COOK, CH3COONa, K2CO3, Na2CO3, NaCl, KCl, EDTA and starch; Wherein, the dyeing-promoting starch auxiliary agent includes at least one of CH3COOK and CH3COONa; Wherein, the dyeing-promoting starch auxiliary agent includes at least one of K2CO3 and Na2CO3; Wherein, the dyeing-promoting starch auxiliary agent comprises at least one of NaCl and KCl; The dyeing-accelerating starch auxiliary agent comprises EDTA, and the rest is starch.

3. A method for applying a dye-promoting starch auxiliary agent in dyeing, characterized in that: The dyeing-promoting starch auxiliary agent comprising any one of claims 1-2; In the production of the machine cylinder, the dyeing objects are divided into light color series, medium color series and dark color series. The dyeing process is as follows: Light color series: dyeing temperature 60℃±5℃, dyeing-promoting starch auxiliary 1~2g / L, sodium sulfate: (15~30)g / L, bath ratio 1:5~10; Medium color system: dyeing temperature 60℃±5℃, dyeing-promoting starch auxiliary 1~2.5g / L, sodium sulfate: (25~50)g / L, bath ratio 1:5~10; Dark color series: dyeing temperature 60℃±5℃, dyeing-promoting starch auxiliary 2~4g / L, glauber powder: (35~70)g / L, bath ratio 1:5~8.

4. An application method according to claim 3, characterized in that: The dyeing process includes dyeing with a starch auxiliaries that accelerates dyeing and other dyes, and includes the following steps:

1. Adding cloth, first adding water and then adding cloth, running for 5 to 10 minutes, the temperature in the vat is room temperature 40°C when the cloth is added, and adding water 2 to 3 minutes before the cloth is added: the temperature in the vat is 30 to 40°C, and the cloth is finished; 2. When dyeing, add water, dyes, and sodium sulfate to the dye vat, pre-dissolve at room temperature for about 10 minutes, and then add 1 to 4 g / L of starch auxiliaries that accelerate dyeing; 3. After adding the dye auxiliaries according to the formula ratio, run for 15 minutes and start heating. The temperature rises to 60℃±5℃, and the dyeing insulation time is 40-60min; 4. After the insulation is over, cut the board to check the color. After the color meets the dyeing requirements, wash it with water, and the circulating washing time is 10-15min; 5. Drainage and post-treatment, add glacial acetic acid to the water after drainage, and neutralize the pH in the tank to neutral, the temperature is 30-40℃, neutralize for 5-10min, and then drain and wash with water; 6. Soap detergent 2g / L, temperature 80-95℃ soap washing for 15min, cool down and enter water, wash for 20min and discharge the cloth.

5. An application method according to claim 4, characterized in that: The dyeing-promoting starch additive is added in batches, first slowly and then quickly.

6. An application method according to claim 4, characterized in that: For sensitive colors, add twice, the first time adding 1 / 4 of the total amount, the second time adding the remaining amount.

7. An application method according to claim 4, characterized in that: Particularly sensitive colors or colors that are difficult to control can be added in three batches, in the order of 1 / 6, 2 / 6, and 3 / 6.

8. An application method according to claim 4, characterized in that: When using dyeing-promoting starch additives in the dyeing process to dye medium and dark cloth with a slightly lighter color, add 0.5-2g / L of sodium carbonate before the dye is put into the tank.

9. An application method according to claim 5, characterized in that: When the color of dyeing by dyeing starch auxiliary is too light, the dosage of sodium sulphate can be increased to 15-70g / L.

10. An application method according to claim 5, characterized in that: When the color of dyeing with starch additives is too light, extend the dyeing time by 15-30 minutes.

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