Printing process

Abstract

The invention relates to the technical field of rayon processing, and particularly discloses a printing process. The printing process comprises the following steps: S1, printing: printing by adopting a printing dye; s2, cleaning is conducted; the rinsed textile to be subjected to color fixation is immersed in a color fixation solution, then mangling and drying are conducted according to the pick-up rate of 70-85%, baking is conducted for 90-270 s at the temperature of 120-130 DEG C, the rayon textile is obtained, and the color fixation solution is a peach gum dispersion solution with the dispersed peach gum concentration of 60-100 g / L. The printing dye has a good dyeing effect and a good color fixing effect, the peach gum dispersion liquid is used as the color fixing liquid in the dyeing process, and the color fixing effect of the finally obtained rayon textile is remarkably optimized.

Description

Technical Field

[0001] The present application relates to the technical field of printing, and more specifically, it relates to a printing process. Background Art

[0002] Rayon, also known as artificial cotton or viscose, is a regenerated fiber extracted and processed from natural cellulose (usually from wood or bamboo) by chemical methods. Rayon has similar properties to natural cotton, such as good moisture absorption, breathability and soft feel, so it is widely used in the textile industry. The production process of rayon mainly involves dissolving cellulose in a chemical solvent, then extruding it into fibers through a spinneret, and then washing, stretching and drying it to make fibers. Rayon fibers can be used alone or blended with other natural or synthetic fibers to make a variety of textiles such as various clothing and bedding.

[0003] People usually print on textiles to create colorful patterns and designs. According to the needs of specific applications, such as interior decoration, outdoor equipment or professional uniforms, specific patterns and colors are customized. Therefore, printing can meet specific functional and aesthetic requirements, enhance the beauty and functionality of textiles, and increase the diversity and market value of textiles. It is an indispensable part of textile design and production. The existing printing processes are divided into flat screen printing, rotary screen printing, transfer printing, digital printing, etc. Among them, rotary screen printing can produce patterns with multiple colors, rich colors, rich layers, and lively patterns, especially in printing large-area patterns, which can achieve excellent printing effects.

[0004] The dyeing process and principle of rotary screen printing is to use a rotary screen to print the printing dye directly on the textile to obtain a dyed fabric, wherein the printing dye reacts chemically with the fiber of the textile to form a bond to ensure the durability and color fastness of the pattern. However, the active groups of the dyes used in the existing printing process will undergo a certain degree of hydrolysis during the dyeing process, causing some dyes to be unable to react with the fibers. These unreactive printing dyes can only be combined with the fibers by weak forces such as hydrogen bonds and van der Waals forces, which is the source of floating colors on the surface of the textile. In the process of removing the floating colors, a very complicated washing process is required. What is more difficult is that conventional washing processes usually cannot completely wash away the floating colors, so the hydrolysis reaction of existing active dyes will damage the color fastness of the dyed fabric to a certain extent. Therefore, providing a printing process with good color fixation effect has become a current priority. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a printing process.

[0006] In a first aspect, the present application provides a printing process, comprising the following steps: S1. Printing: Printing is performed using printing dyes; S2, cleaning; S3, color fixing: immersing the textile to be fixed after rinsing in a color fixing solution, then squeezing the solution at a squeezing rate of 70-85%, drying, and baking at a temperature of 120-130° C. for 90-270 seconds to obtain a man-made cotton textile, wherein the color fixing solution is a peach gum dispersion with a dispersed peach gum concentration of 60-100 g / L.

[0007] The above dyeing process is specifically as follows: S1. Printing: S11, dispersing the active dye in water under a dispersant environment, adding zirconium beads to grind, filtering, then adding an alkali agent and a penetrant, stirring until the solid in the system is completely dissolved, then adding a thickening stabilizer, and then diluting with water to obtain a printing dye for standby use; S12, printing the printing dye on a rayon textile by a rotary screen printing method, drying at 60° C. for 10 min, steaming at 102° C. for 10 min, and then cooling to room temperature to obtain a printed semi-finished product; S2. Cleaning: The printed semi-finished product obtained in step S1 is washed with water, soaped for 30 minutes at a bath ratio of 1:50 and a temperature of 80° C., washed with water twice, and dried under ventilation to obtain a washed semi-finished product; S3, color fixation: S31, washing the solid peach gum, filtering it, then adding it into water to soak it, boiling it under normal pressure to obtain liquid peach gum, then adding polyethylene glycol into the liquid peach gum, stirring it until the polyethylene glycol is completely dissolved, obtaining dispersed peach gum and dispersing it in water to obtain a peach gum dispersion liquid with a dispersed peach gum concentration of 60-100g / L as a color fixing liquid; S32, immersing the textile to be fixed after rinsing in the fixing solution, then squeezing the solution at a squeezing rate of 70-85%, drying at 60° C. for 180 seconds, and baking at a temperature of 120-130° C. for 90-270 seconds, finally obtaining a rayon textile.

[0008] Preferably, in step S1, the raw materials used for printing dyes include the following components in parts by weight: 25-35 parts of active dyes; 18-25 parts of alkali agent; 75-85 parts of penetrant; 20-25 parts of thickening stabilizer; 830-860 parts of water; wherein the active dyes are prepared by coupling reaction of active ligands and intermediates, specifically: The intermediate is dispersed in an organic solvent, stirred until completely dissolved, and then an active ligand is added, the pH value of the system is adjusted to 6-7, stirring is continued, water is added to precipitate solid, solid is obtained by filtration, and an active dye is obtained after chromatography. The active ligand includes at least one of p-nitroaniline diazonium salt, 2-amino-5-nitrothiazole diazonium salt and aniline diazonium salt, and the intermediate is a product of a condensation reaction of N-ethyl-N-hydroxyethylaniline and cyanuric chloride.

[0009] Wherein, the preparation method of the intermediate is specifically as follows: At room temperature, N-ethyl-N-hydroxyethylaniline, cyanuric chloride, sodium bicarbonate and acetone are uniformly mixed, stirred until N-ethyl-N-hydroxyethylaniline is completely consumed, and then an organic phase is extracted to obtain the organic phase, which is washed and dried, and the organic solvent is removed under reduced pressure, and chromatographic separation is performed to finally obtain an intermediate.

[0010] The preparation method of the p-nitroaniline diazonium salt is specifically as follows: Disperse p-nitroaniline and 1,5-naphthalene disulfonic acid in ethyl ester at 50°C and stir for 10 minutes. Add tert-butyl nitrite to the system at 25°C and stir for 20 minutes while keeping the temperature constant. Filter the precipitated solid product and air-dry it to obtain p-nitroaniline diazonium salt.

[0011] The preparation method of the 2-amino-5-nitrothiazole diazonium salt is specifically as follows: Mix sodium nitrite with concentrated sulfuric acid and stir until the sodium nitrite particles are completely dissolved, then add propionic acid-acetic acid mixture, stir, and cool to 0°C to obtain liquid A, then disperse 2-amino-5-nitrothiazole in the propionic acid-acetic acid mixture, stir at 0°C for 0.5h to obtain liquid B, finally mix liquid A with liquid B, stir at 0°C for 1.5h to obtain 2-amino-5-nitrothiazole diazonium salt.

[0012] The preparation method of the aniline diazonium salt is specifically as follows: Aniline, water and hydrochloric acid were mixed and stirred for 10 minutes, and sodium nitrite aqueous solution was added into the system at a temperature of 2°C and reacted for 1 hour to obtain aniline diazonium salt.

[0013] Preferably, the raw materials used for the printing dye include the following components in parts by weight: 30 parts of reactive dye; 20 parts of alkali agent; 80 parts of penetrant; 22 parts of thickening stabilizer; and 848 parts of water.

[0014] By adopting the above technical scheme, the present application introduces a dichloro-isotriazine structure on the hydroxyethyl group of the azo chromophore, and obtains a reactive dye by condensation and coupling. The reactive dye has a better color fixation effect than ordinary dyes (Novaklon Blue P-3R, CI Reactive Blue 194, etc.). The color fixation rate of the finally obtained man-made cotton textiles reaches more than 85%, and the color fastness is very excellent. The color fastness under soap washing, friction and sublimation tests can reach level 4 or above.

[0015] The present application firstly obtains printing dyes by compounding active dyes, alkali agents, penetrants, thickening stabilizers and water, then uses a rotary screen printing process to print rayon textiles, then washes them with water, soaps them, and washes them twice to obtain a washed semi-finished product, finally uses peach gum dispersion as a color fixing liquid, and gradually controls the concentration of the dispersed peach gum, the rolling rate and the baking time, thereby significantly optimizing the color fixing effect and dyeing effect of the finally obtained rayon textiles.

[0016] Preferably, the active ligand includes p-nitroaniline diazonium salt and aniline diazonium salt.

[0017] Preferably, the molar ratio of the p-nitroaniline diazonium salt to the aniline diazonium salt is (1-1.5):1.

[0018] Preferably, the molar ratio of the p-nitroaniline diazonium salt to the aniline diazonium salt is 1.2:1.

[0019] By adopting the above technical scheme, the present application utilizes p-nitroaniline diazonium salt and aniline diazonium salt as active ligands, giving full play to the synergistic effect of the two, and the obtained printing dye has both good dyeing effect and color fixation effect. Compared with the active ligands obtained by other combinations, p-nitroaniline diazonium salt and aniline diazonium salt can make the final color fixation rate relatively increased by up to 7.17%. At the same time, the present application further controls the molar ratio of p-nitroaniline diazonium salt and aniline diazonium salt. Experimental data show that when it is 1.2:1, the synergistic effect produced by the compounding of the two is optimal, and the K / S of the finally obtained man-made cotton textiles reaches 19.5, and the color fixation rate reaches 91.2%, which has very excellent dyeing effect and color fixation effect.

[0020] Preferably, in step S3, the concentration of dispersed peach gum in the peach gum dispersion is 80 g / L.

[0021] Preferably, in step S3, the margin ratio is 80%.

[0022] Preferably, in step S3, the baking time is 180 seconds.

[0023] In a third aspect, the present application provides a man-made cotton textile produced by the above-mentioned dyeing process.

[0024] By adopting the above technical solution, the man-made cotton textiles of the present application have less floating color, high color fastness, good dyeing effect, and have high practical application value.

[0025] In summary, this application has the following beneficial technical effects: 1. The present application utilizes a compound of p-nitroaniline diazonium salt and aniline diazonium salt as active ligands, giving full play to the synergistic effect of the two, and the obtained printing dye has both good dyeing effect and color fixation effect. Compared with the active ligands obtained by other combinations, p-nitroaniline diazonium salt and aniline diazonium salt can make the color fixation rate of the final obtained man-made cotton textiles relatively increased by up to 7.17%; 2. The present application firstly obtains printing dyes by compounding active dyes, alkali agents, penetrants, thickening stabilizers and water, then uses a rotary screen printing process to print rayon textiles, then washes them with water, soaps them, and washes them twice to obtain a washed semi-finished product, and finally uses peach gum dispersion as a color fixing liquid, and gradually controls the concentration of the dispersed peach gum, the rolling rate and the baking time, thereby significantly optimizing the color fixing effect of the finally obtained rayon textiles; 3. The man-made cotton textiles of the present application have less floating color, high color fastness, good dyeing effect, and have high practical application value. DETAILED DESCRIPTION

[0026] Material Source Unless otherwise specified, the raw materials used in this application are all commercially available products, specifically: p-Nitroaniline was purchased from Shanghai MacLean Reagent Co., Ltd. 1,5-Naphthalenedisulfonic acid was purchased from Hangzhou Gaojing Fine Chemical Co., Ltd.; Tert-butyl nitrite was purchased from Hangzhou Gaojing Fine Chemical Co., Ltd.; 2-Amino-5-nitrothiazole was purchased from Shanghai MacLean Reagent Co., Ltd.; Aniline was purchased from Shanghai MacLean Reagent Co., Ltd.; Cyanuric chloride was purchased from Shanghai MacLean Reagent Co., Ltd.; N-ethyl-N-hydroxyethylaniline was purchased from Shanghai MacLean Reagent Co., Ltd.; DMF was purchased from Hangzhou Gaojing Fine Chemical Co., Ltd.; Soap flakes were purchased from Shanghai Textile Industry Technical Supervision Institute; Dispersant NNO was purchased from Jinan Baoda Dye Chemical Co., Ltd., CAS No. 36290-04-7; The alkali agent was sodium bicarbonate, purchased from Hangzhou Gaojing Fine Chemical Co., Ltd.; The penetrant was urea, purchased from Hangzhou Gaojing Fine Chemical Co., Ltd.; The thickening stabilizer was sodium alginate, purchased from Hangzhou Tianma Sihong Digital Technology Co., Ltd.; Soap flakes were purchased from Shanghai Textile Industry Technical Supervision Institute; Solid peach gum was purchased from Songtao Agricultural Science and Technology Development Co., Ltd.; Polyethylene glycol was purchased from Jining Tangyi Chemical Co., Ltd., CAS No. 25322-68-3; Novaclonal Blue P-3R was purchased from Shenzhen Longgang District Jincaiyuan Chemical Dye Trading Company, with the item number 20021; CI Reactive Blue 194 was purchased from Hubei Wonder Chemical Co., Ltd. with a CAS number of 12236-92-9.

[0027] The present application is further described in detail below in combination with preparation examples, embodiments and comparative examples.

[0028] Preparation Example 1.1 The preparation method of an active ligand (diazonium salt of p-nitroaniline) comprises the following steps: dispersing 5 mol of p-nitroaniline and 5 mol of 1,5-naphthalene disulfonic acid in 50 L of ethyl ester at 50°C, stirring for 10 minutes, adding 7.5 mol of tert-butyl nitrite into the system at 25°C for no longer than 2 minutes, stirring for 20 minutes after the addition is completed, keeping the temperature constant, filtering the precipitated solid product, and air-drying to obtain the diazonium salt of p-nitroaniline.

[0029] Preparation Example 1.2 The preparation method of the active ligand (2-amino-5-nitrothiazole diazonium salt) comprises the following steps: slowly dripping 5 mol of sodium nitrite into 2.5 L of concentrated sulfuric acid, vigorously stirring until the sodium nitrite particles are completely dissolved, and then adding 6 L of propionic acid-acetic acid mixture (V 丙酸 :V 乙酸 =1:5), stirred for 30 min and then cooled to 0°C to obtain solution A. Then, 5 mol of 2-amino-5-nitrothiazole was dispersed in the propionic acid-acetic acid mixture (V 丙酸 :V 乙酸 =1:5), stirred at 0°C for 0.5h to obtain solution B, and finally mixed solution A with solution B, stirred at 0°C for 1.5h to obtain 2-amino-5-nitrothiazole diazonium salt.

[0030] Preparation Example 1.3 The preparation method of the active ligand (aniline diazonium salt) comprises the following steps: 5 mol of aniline, 2 L of water and 2 L of hydrochloric acid are mixed, stirred for 10 min, and 2 L of 5 mol / L sodium nitrite aqueous solution is added into the system at a temperature of 2°C, reacted for 1 h, and aniline diazonium salt is obtained.

[0031] Preparation Example 2.1 The preparation method of reactive dye comprises the following steps: 1. Preparation of intermediate: At room temperature, 50 mol of cyanuric chloride, 50 mol of sodium bicarbonate, 50 mol of N-ethyl-N-hydroxyethylaniline and 75 L of acetone were mixed and stirred for 16 h. After the N-ethyl-N-hydroxyethylaniline was completely consumed as determined by thin layer chromatography, stirring was stopped. Deionized water and ethyl acetate were added for extraction to obtain an organic phase. The organic phase was washed with saturated brine and then dried over anhydrous sodium sulfate. The ethyl acetate was removed under reduced pressure to obtain a crude product. The crude product was purified by silica gel column chromatography (eluent: V 石油醚 :V 乙酸乙酯 =4:1) to separate the intermediate for future use; 2. Preparation of reactive dyes: Disperse 5 mol of the intermediate prepared in step I in 10 L of DMF, stir in an ice-water bath until completely dissolved, then slowly add 5 mol of the diazonium salt of p-nitroaniline prepared in Preparation Example 1.1, adjust the pH value of the system to 6-7, continue stirring for 1 h, add water to precipitate, filter to obtain a solid, and chromatograph on a silica gel column (eluent: V 石油醚 :V 乙酸乙酯 =10:1) to obtain reactive dyes.

[0032] Preparation Example 2.2 The preparation method of reactive dye comprises the following steps: 1. Preparation of intermediate: At room temperature, 50 mol of cyanuric chloride, 50 mol of sodium bicarbonate, 50 mol of N-ethyl-N-hydroxyethylaniline and 75 L of acetone were mixed and stirred for 16 h. After the N-ethyl-N-hydroxyethylaniline was completely consumed as determined by thin layer chromatography, stirring was stopped. Deionized water and ethyl acetate were added for extraction to obtain an organic phase. The organic phase was washed with saturated brine and then dried over anhydrous sodium sulfate. The ethyl acetate was removed under reduced pressure to obtain a crude product. The crude product was purified by silica gel column chromatography (eluent: V 石油醚 :V 乙酸乙酯 =4:1) to separate the intermediate for future use; 2. Preparation of reactive dyes: Disperse 5 mol of the intermediate obtained in step I in 10 L of DMF, stir in an ice-water bath until completely dissolved, then slowly add 5 mol of 2-amino-5-nitrothiazole diazonium salt obtained in Preparation Example 1.2, adjust the pH value of the system to 6-7, continue stirring for 1 h, add water to precipitate, filter to obtain a solid, and chromatograph on a silica gel column (eluent: V 石油醚 :V 乙酸乙酯 =10:1) to obtain reactive dyes.

[0033] Preparation Example 2.3 The preparation method of reactive dye comprises the following steps: 1. Preparation of intermediate: At room temperature, 50 mol of cyanuric chloride, 50 mol of sodium bicarbonate, 50 mol of N-ethyl-N-hydroxyethylaniline and 75 L of acetone were mixed and stirred for 16 h. After the N-ethyl-N-hydroxyethylaniline was completely consumed as determined by thin layer chromatography, stirring was stopped. Deionized water and ethyl acetate were added for extraction to obtain an organic phase. The organic phase was washed with saturated brine and then dried over anhydrous sodium sulfate. The ethyl acetate was removed under reduced pressure to obtain a crude product. The crude product was purified by silica gel column chromatography (eluent: V 石油醚 :V 乙酸乙酯 =4:1) to separate the intermediate for future use; 2. Preparation of reactive dyes: Disperse 5 mol of the intermediate obtained in step I in 10 L of DMF, stir in an ice-water bath until completely dissolved, then slowly add 5 mol of the aniline diazonium salt obtained in Preparation Example 1.3, adjust the pH value of the system to 6-7, continue stirring for 1 h, add water to precipitate, filter to obtain a solid, and chromatograph on a silica gel column (eluent: V 石油醚 :V 乙酸乙酯 =10:1) to obtain reactive dyes.

[0034] Preparation Example 2.4 The preparation method of the reactive dye is different from that of Preparation Example 2.1 in that, in step II, 5 mol of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 is replaced by 2.5 mol of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 and 2.5 mol of 2-amino-5-nitrothiazole diazonium salt prepared in Preparation Example 1.2, and the rest is the same as Preparation Example 2.1.

[0035] Preparation Example 2.5 The method for preparing reactive dyes is different from that of Preparation Example 2.1 in that, in step II, 5 mol of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 is replaced by 2.5 mol of aniline diazonium salt prepared in Preparation Example 1.3 and 2.5 mol of 2-amino-5-nitrothiazole diazonium salt prepared in Preparation Example 1.2, and the rest is the same as Preparation Example 2.1.

[0036] Preparation Example 2.6 The preparation method of the reactive dye is different from that of Preparation Example 2.1 in that, in step II, 5 mol of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 is replaced by 2.5 mol of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 and 2.5 mol of aniline diazonium salt prepared in Preparation Example 1.3, and the rest is the same as Preparation Example 2.1.

[0037] Preparation Example 2.7 The method for preparing reactive dyes is different from that of Preparation Example 2.1 in that, in step II, 5 mol of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 is replaced by 1.7 mol of p-nitroaniline diazonium salt prepared in Preparation Example 1.1, 1.6 mol of 2-amino-5-nitrothiazole diazonium salt prepared in Preparation Example 1.2 and 1.7 mol of aniline diazonium salt prepared in Preparation Example 1.3, and the rest is the same as Preparation Example 2.1.

[0038] Preparation Example 3.1 The preparation method of the reactive dye is different from that of Preparation Example 2.6 in that the amount of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 is 2.73 mol, and the amount of aniline diazonium salt prepared in Preparation Example 1.3 is 2.27 mol, and the rest is the same as Preparation Example 2.6.

[0039] Preparation Example 3.2 The preparation method of the reactive dye is different from that of Preparation Example 2.6 in that the amount of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 is 2.92 mol, and the amount of aniline diazonium salt prepared in Preparation Example 1.3 is 2.28 mol, and the rest is the same as Preparation Example 2.6.

[0040] Preparation Example 3.3 The preparation method of the reactive dye is different from that of Preparation Example 2.6 in that the amount of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 is 3 mol, and the amount of aniline diazonium salt prepared in Preparation Example 1.3 is 2 mol, and the rest is the same as Preparation Example 2.6.

[0041] Preparation Example 3.4 The preparation method of the reactive dye is different from that of Preparation Example 2.6 in that the amount of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 is 2 mol, and the amount of aniline diazonium salt prepared in Preparation Example 1.3 is 3 mol, and the rest is the same as Preparation Example 2.6.

[0042] Preparation Example 3.5 The preparation method of the reactive dye is different from that of Preparation Example 2.6 in that the amount of p-nitroaniline diazonium salt prepared in Preparation Example 1.1 is 4 mol, and the amount of aniline diazonium salt prepared in Preparation Example 1.3 is 1 mol, and the rest is the same as Preparation Example 2.6.

[0043] Example 1.1 A printing process comprises the following steps: S1. Printing: S11, 250g of the active dye prepared in Preparation Example 2.1 and 500g of the dispersant NNO are uniformly dispersed in 2L of water, 100g of zirconium beads are added and ground for 1h, filtered, and then 2L of water is added for dilution, followed by 250g of an alkali agent and 750g of a penetrant, stirred until the solid in the system is completely dissolved, and then 250g of a thickening stabilizer is added, followed by 4.6L of water for dilution to obtain a printing dye for later use; S12, the printing dye obtained in step S11 is printed on a rayon textile by a rotary screen printing method, and dried at 60°C for 10min, steamed at 102°C for 10min, and then cooled to room temperature to obtain a printed semi-finished product; S2. Cleaning: The printed semi-finished product obtained in step S12 is washed with water, and soaped for 30 minutes at a bath ratio of 1:50 and a temperature of 80° C., wherein the soaping liquid is a mixture of soap flakes, sodium carbonate and water in a weight ratio of 5:2:100, and then washed with water twice after soaping, and dried under ventilation to obtain a washed semi-finished product; S3, color fixation: S31, washing the solid peach gum, filtering it, and then adding it into water for soaking, the amount of water used is 2000wt% of the amount of the solid peach gum, boiling and simmering for 4h under normal pressure to obtain liquid peach gum, then adding polyethylene glycol in an amount of 10wt% of the total amount of the liquid peach gum into the liquid peach gum, stirring until the polyethylene glycol is completely dissolved, and after obtaining dispersed peach gum, dispersing it in water to obtain a peach gum dispersion liquid with a dispersed peach gum concentration of 100g / L as a fixing solution; S32, immersing the textile to be fixed after rinsing in the fixing solution, then squeezing out the solution at a squeezing rate of 85%, drying at 60° C. for 180 seconds, and baking at 120° C. for 270 seconds, to finally obtain a rayon textile.

[0044] Example 1.2 A printing process comprises the following steps: S1. Printing: S11, 200g of the active dye prepared in Preparation Example 2.1 and 400g of the dispersant NNO are uniformly dispersed in 2L of water, 100g of zirconium beads are added and ground for 1h, filtered, and then 2L of water is added for dilution, followed by 180g of an alkali agent and 850g of a penetrant, stirred until the solid in the system is completely dissolved, and then 200g of a thickening stabilizer is added, followed by 4.3L of water for dilution to obtain a printing dye for later use; S12, the printing dye obtained in step S11 is printed on a rayon textile by a rotary screen printing method, and dried at 60°C for 10min, steamed at 102°C for 10min, and then cooled to room temperature to obtain a printed semi-finished product; S2. Cleaning: The printed semi-finished product obtained in step S12 is washed with water, and soaped for 30 minutes at a bath ratio of 1:50 and a temperature of 80° C., wherein the soaping liquid is a mixture of soap flakes, sodium carbonate and water in a weight ratio of 5:2:100, and then washed with water twice after soaping, and dried under ventilation to obtain a washed semi-finished product; S3, color fixation: S31, washing the solid peach gum, filtering it, and then adding it into water for soaking, the amount of water used is 2000wt% of the solid peach gum, boiling and simmering for 4h under normal pressure to obtain liquid peach gum, then adding polyethylene glycol in an amount of 10wt% of the total amount of liquid peach gum into the liquid peach gum, stirring until the polyethylene glycol is completely dissolved, and after obtaining dispersed peach gum, dispersing it in water to obtain a peach gum dispersion liquid with a dispersed peach gum concentration of 60g / L as a fixing liquid; S32, immersing the textile to be fixed after rinsing in the fixing solution, then squeezing out the solution at a squeezing rate of 70%, drying at 60° C. for 180 seconds, and baking at 130° C. for 90 seconds, finally obtaining a rayon textile.

[0045] Example 1.3 A printing process, which is different from Example 1.1 in that, in step S11, the amounts of the components of the printing dye are different, specifically: S11. Evenly disperse 300 g of the active dye prepared in Preparation Example 2.1 and 600 g of dispersant NNO in 2 L of water, add 100 g of zirconium beads and grind for 1 h, filter, add 2 L of water to dilute, then add 200 g of alkali agent and 800 g of penetrant, stir until the solid in the system is completely dissolved, then add 220 g of thickening stabilizer, then add 4.48 L of water to dilute to obtain printing dye for use.

[0046] Examples 2.1-2.11 A printing process, which is different from Example 1.1 in that, in step S11, the reactive dyes prepared in Preparation Example 2.1 are replaced by the reactive dyes prepared in Preparation Examples 2.2-3.5 respectively, and the rest are the same as Example 1.1.

[0047] Example 3.1 A printing process, which is different from Example 1.1 in that, in step S31, the concentration of dispersed peach gum in the prepared peach gum dispersion is 70 g / L, and the rest is the same as Example 1.1.

[0048] Example 3.2 A printing process, which is different from Example 1.1 in that, in step S31, the concentration of dispersed peach gum in the prepared peach gum dispersion is 80 g / L, and the rest is the same as Example 1.1.

[0049] Example 3.3 A printing process, which is different from Example 1.1 in that, in step S31, the concentration of dispersed peach gum in the prepared peach gum dispersion is 90 g / L, and the rest is the same as Example 1.1.

[0050] Example 3.4 A printing process, which is different from Example 1.1 in that, in step S31, the concentration of dispersed peach gum in the prepared peach gum dispersion is 100 g / L, and the rest is the same as Example 1.1.

[0051] Example 4.1 A printing process, which is different from Example 1.1 in that, in step S32, the rolling rate is 80%, and the rest is the same as Example 1.1.

[0052] Example 4.2 A printing process, which is different from Example 1.1 in that, in step S32, the rolling rate is 75%, and the rest is the same as Example 1.1.

[0053] Example 4.3 A printing process, which is different from Example 1.1 in that, in step S32, the rolling rate is 70%, and the rest is the same as Example 1.1.

[0054] Example 5.1 A printing process, which is different from Example 1.1 in that, in step S32, baking is performed at a temperature of 120° C. for 240 seconds, and the rest is the same as Example 1.1.

[0055] Example 5.2 A printing process, which is different from Example 1.1 in that, in step S32, baking is performed at a temperature of 120° C. for 210 seconds, and the rest is the same as Example 1.1.

[0056] Example 5.3 A printing process, which is different from Example 1.1 in that, in step S32, baking is performed at a temperature of 120° C. for 180 seconds, and the rest is the same as Example 1.1.

[0057] Example 5.4 A printing process, which is different from Example 1.1 in that, in step S32, baking is performed at a temperature of 120° C. for 135 seconds, and the rest is the same as Example 1.1.

[0058] Example 5.5 A printing process, which is different from Example 1.1 in that, in step S32, baking is performed at a temperature of 120° C. for 90 seconds, and the rest is the same as Example 1.1.

[0059] Comparative Example 1-2 The difference from Example 1.1 is that the reactive dyes prepared in Preparation Example 2.1 in step S11 are replaced by equal amounts of Novaclonine Blue P-3R and CI Reactive Blue 194, respectively, and the rest are the same as Example 1.1.

[0060] Comparative Example 3 The difference from Example 1.1 is that step S3 is removed, and the cleaned product obtained in step S2 is dried to obtain the rayon textile, and the rest is the same as Example 1.1.

[0061] Performance Testing 1. Color depth measurement: Use SF600 colorimeter, set D65 light source, 10° viewing angle, test the color depth of different parts of the man-made cotton textiles prepared in the examples and comparative examples, take the average value after 4 times, and express it in K / S; 2. Calculation of color fixation rate: Cut 2 g of each of the man-made cotton textiles prepared in the embodiment and the comparative example, immerse them in DMF at 120°C for color stripping treatment, and after 10 minutes, if the DMF shows the color of the dye, replace it with new DMF until no dye on the man-made cotton textile is dissolved in the DMF, then take out the man-made cotton textile, wash it with tap water and dry it in the air, and calculate the color fixation rate f%=(K / S)1 / (K / S)×100, (K / S)1 is the color depth value after color stripping, and (K / S) is the color depth value before color stripping; 3. Color fastness determination: The color fastness of the human cotton textiles prepared in the Examples and Comparative Examples under soaping (discoloration), friction (drying) and sublimation (discoloration) was determined with reference to the methods in GB / T 3920-2008, GB / T 3921-2008 and GB / T 5718-1997.

[0062] Table 1 Performance test Data Analysis: As can be seen from Table 1, the K / S of Examples 1.1-1.2 is 18.3-18.5, the f% is 85.2-85.3, and the soaping color fastness, rubbing color fastness, and biochemical color fastness are all 4, proving that the present application introduces a dichloro-s-triazine structure into the hydroxyethyl group of the azo chromophore, and obtains a reactive dye by condensation and coupling. The reactive dye has a more superior color fixation effect than ordinary dyes (Novaklon Blue P-3R, CI Reactive Blue 194, etc.), and the color fixation rate of the finally obtained human cotton textile reaches more than 85%, with very excellent color fastness, and the color fastness under soaping, rubbing and sublimation measurements can reach level 4 or above; In Example 2, the f%, soap color fastness, rubbing color fastness and biochemical color fastness of Example 2.5 and Example 2.7-2.11 are significantly higher than those of other examples, proving that the present application makes full use of the synergistic effect of p-nitroaniline diazonium salt and aniline diazonium salt, and the prepared printing dye has both good dyeing effect and color fixing effect. Compared with the active ligands obtained by other combinations, p-nitroaniline diazonium salt and aniline diazonium salt can make the color fixing rate of the final obtained human-cotton textile relatively increased by up to 7.17%; in Examples 3-5, the present application changes the concentration of dispersed peach gum in the color fixing solution, the rolling rate during color fixing and the baking time, among which the f%, soap color fastness, rubbing color fastness and biochemical color fastness of Example 3.2, Example 4.1 and Example 5.3 are significantly higher than those of other examples, proving that the present application significantly optimizes the color fixing effect of the final obtained human-cotton textile by strictly controlling the concentration of dispersed peach gum in the color fixing solution, the rolling rate during color fixing and the baking time.

[0063] The f% and various color fastnesses of comparative examples 1-2 are significantly lower than those of example 1.1, which proves that the reactive dyes of the present application have higher dyeing effect and color fixing effect. The f% and various color fastnesses of comparative example 3 are significantly lower than those of example 1.1, which proves that the present application uses peach gum dispersion as a color fixing liquid to fix the semi-finished product after cleaning, which can significantly improve the color fixing effect of the final human cotton textiles.

[0064] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A printing process, characterized in that: The following steps are involved: S1. Printing: Printing is performed using printing dyes; S2, cleaning; S3, color fixing: immerse the textile to be fixed after rinsing in a color fixing solution, then squeeze out the solution at a squeeze rate of 70-85%, dry, and bake at a temperature of 120-130° C. for 90-270 seconds to obtain a man-made cotton textile, wherein the color fixing solution is a peach gum dispersion with a dispersed peach gum concentration of 60-100 g / L.

2. A printing process according to claim 1, characterized in that: In step S1, the raw materials used for printing dyes include the following components in parts by weight: 25-35 parts of active dyes; 18-25 parts of alkali agents; 75-85 parts of penetrants; 20-25 parts of thickening stabilizers; and 830-860 parts of water; wherein the active dyes are prepared by coupling reactions of active ligands and intermediates, specifically: The intermediate is dispersed in an organic solvent, stirred until completely dissolved, and then an active ligand is added, the pH value of the system is adjusted to 6-7, stirring is continued, water is added to precipitate solid, solid is obtained by filtration, and an active dye is obtained after chromatography, wherein the active ligand comprises at least one of p-nitroaniline diazonium salt, 2-amino-5-nitrothiazole diazonium salt and aniline diazonium salt, and the intermediate is a product of a condensation reaction of N-ethyl-N-hydroxyethylaniline and cyanuric chloride.

3. A printing process according to claim 2, characterized in that: The raw materials used for the printing dye include the following components in parts by weight: 30 parts of active dye; 20 parts of alkali agent; 80 parts of penetrant; 22 parts of thickening stabilizer; and 848 parts of water.

4. A printing process according to claim 2, characterized in that: The active ligands include p-nitroaniline diazonium salt and aniline diazonium salt.

5. A printing process according to claim 4, characterized in that: The molar ratio of the p-nitroaniline diazonium salt to the aniline diazonium salt is (1-1.5):

1.

6. A printing process according to claim 5, characterized in that: The molar ratio of the p-nitroaniline diazonium salt to the aniline diazonium salt is 1.2:

1.

7. A printing process according to claim 1, characterized in that: In step S3, the concentration of the dispersed peach gum in the peach gum dispersion is 80 g / L.

8. A printing process according to claim 1, characterized in that: In step S3, the margin ratio is 80%.

9. A printing process according to claim 1, characterized in that: In step S3, the baking time is 180 seconds.

10. A man-made cotton textile produced by the printing process according to any one of claims 1 to 9.

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