Embroidery-imitating printing technology of disperse dye for cellulose acetate fiber fabric

Abstract

The invention discloses a disperse dye embroidery-imitating printing process for acetate fiber fabric, which comprises the following steps: printing and steaming the acetate fiber fabric with a printing dye, washing with water, and setting at high temperature to obtain the embroidery-imitating printed acetate fiber fabric. The hydroxyl group can form a hydrogen bond with hydroxyl oxygen on acetate fiber acetoxy, the cyano group is a strong polar group and can interact with ester group polarity of acetate fiber, meanwhile, the modified dye molecule contains a large number of azo groups, the saturation degree and tinting strength of the dye can be improved, meanwhile, the modified dye molecule contains an organic silicon chain segment, the hydrophobicity of the dye can be improved, and the dye can be used for dye dyeing. And after multiple times of washing, the dye on the surface does not fade and fall off, and meanwhile, the film layer can be endowed with soft and smooth characteristics, so that the printed part is softer and is closer to the touch feeling of high-quality embroidery.

Description

Technical Field

[0001] This invention relates to the field of acetate fiber fabric preparation technology, specifically to a disperse dye imitation embroidery printing process for acetate fiber fabric. Background Technology

[0002] Fiber acetate, also known as cellulose acetate fiber, is a man-made fiber synthesized from cellulose through chemical modification. It combines the comfort of natural fibers with the excellent properties of synthetic fibers. Fabrics made from it possess a silk-like luster, a smooth hand feel, good moisture absorption and breathability, and excellent drape. Furthermore, it is biodegradable, making it a highly sought-after high-end clothing fabric. Disperse dyes are a class of non-ionic dyes with very low water solubility, existing primarily as tiny particles dispersed in water during dyeing. They diffuse into the fiber interior at temperatures above the glass transition temperature of hydrophobic fibers (such as polyester and cellulose acetate) to color the fabric. Imitation embroidery printing is a special printing process that aims to create three-dimensional, embroidery-like patterns on fabric through color layering and line outlining techniques. However, existing printing processes suffer from significant color fading and peeling after repeated washing, severely affecting the aesthetics. Summary of the Invention

[0003] The purpose of this invention is to provide a disperse dye embroidery printing process for acetate fiber fabrics, which solves the problem that the dye adhesion effect of the current embroidery printing process for acetate fiber fabrics is generally poor.

[0004] The objective of this invention can be achieved through the following technical solutions: A disperse dye embroidery-like printing process for acetate fiber fabric includes the following steps: Step A1: Mix N,N-dicyanethylaniline, hydrochloric acid solution and DMF. Stir and add modifying additives at a speed of 200-300 r / min and a temperature of 0-5℃. After reacting for 20-30 min, raise the temperature to 10-15℃, adjust the pH value to 4-5, and continue the reaction for 4-6 h to obtain the modified dye. Step A2: Weigh the following raw materials in the following percentages: 3-5% modified dye, 1-2% sodium lignosulfonate, 20-30% sodium alginate, and 0.5-1.5% penetrant JFC, with the remainder being water. Mix the raw materials evenly and adjust the pH value to 5-6 to obtain the printing dye. Print the printing dye onto the acetate fiber fabric. After steaming for 40-50 minutes at a temperature of 120-130℃, wash with water and then set at a temperature of 150-160℃ to obtain the imitation embroidery printed acetate fiber fabric.

[0005] Furthermore, the ratio of N,N-dicyanoethylaniline, hydrochloric acid solution, and modifying additive in step A1 is 0.02 mol: 4 mL: 0.1 g, and the mass fraction of hydrochloric acid solution is 37%.

[0006] Furthermore, the modified additive is prepared by the following steps: Step B1: Mix tetramethylcyclotetrasiloxane, p-nitrostyrene, chloroplatinic acid and DMF, purge with nitrogen, and react for 6-8 hours at a speed of 150-200 r / min and a temperature of 80-85℃ to obtain the modified monomer. Mix octamethylcyclotetrasiloxane, the modified monomer, tetramethyldisiloxane, tetramethylammonium hydroxide and DMF, purge with nitrogen, and react for 3-5 hours at a speed of 150-200 r / min and a temperature of 90-95℃ to obtain the pretreated polysiloxane. Step B2: Mix the pretreated polysiloxane, palladium on carbon catalyst and DMF evenly, introduce hydrogen gas, and react for 4-6 hours at a rotation speed of 300-500 r / min, a temperature of 75-80℃ and a pressure of 1-2 MPa to obtain amino-modified polysiloxane. Mix acrylic acid, diethanolamine, dicyclohexylcarbodiimide and toluene, and react for 3-5 hours at a rotation speed of 200-300 r / min and a temperature of 30-40℃ to obtain modifier. Step B3: Mix the aminated polysiloxane, modifier, caster catalyst and DMF, purge with nitrogen for protection, and react for 6-8 hours at a speed of 150-200 r / min and a temperature of 80-85℃ to obtain the modified polysiloxane. Mix the modified polysiloxane, sulfuric acid and DMF evenly, stir and add sodium nitrite at a speed of 200-300 r / min and a temperature of 0℃, and react for 3-5 hours to obtain the modified additive.

[0007] Furthermore, in step B1, the molar ratio of tetramethylcyclotetrasiloxane to p-nitrostyrene is 1:4, the amount of chloroplatinic acid is 0.01% of the mass of tetramethylcyclotetrasiloxane, and the molar ratio of octamethylcyclotetrasiloxane, modified monomer, tetramethyldisiloxane and tetramethylammonium hydroxide is 1:0.2:1:1.5.

[0008] Furthermore, the amount of palladium catalyst on carbon mentioned in step B2 is 5% of the mass of the pretreated polysiloxane, and the molar ratio of acrylic acid, diethanolamine and dicyclohexylcarbodiimide is 1:1:1.1.

[0009] Furthermore, in step B3, the molar ratio of the aminated polysiloxane to the modifier is 1:2, the amount of the cassette catalyst is 0.02% of the modifier mass, the molar ratio of the amino group, sulfuric acid and sodium nitrite on the modified polysiloxane is 2:8:2.2, and the mass fraction of sulfuric acid is 25%.

[0010] The beneficial effects of this invention: This invention discloses a disperse dye imitation embroidery printing process for acetate fiber fabric. The printing dye is applied to acetate fiber fabric, followed by steam treatment, water washing, and high-temperature setting treatment to obtain an embroidery-printed acetate fiber fabric. The printing dye includes the following raw materials: modified dye, sodium lignosulfonate, sodium alginate, penetrant JFC, and water. The modified dye is prepared by reacting modified additives and N,N-dicyanoethyl aniline as raw materials, so that the diazonium salt structure on the modified additive and the benzene ring of N,N-dicyanoethyl aniline are coupled together to obtain the modified dye.

[0011] The modified additive uses tetramethylcyclotetrasiloxane and p-nitrostyrene as raw materials. Under the action of chloroplatinic acid, the Si-H bonds on tetramethylcyclotetrasiloxane and the double bonds on p-nitrostyrene react to produce a modified monomer. Octamethylcyclotetrasiloxane and the modified monomer undergo ring-opening condensation, followed by reaction with tetramethyldisiloxane to obtain a pretreated polysiloxane. The pretreated polysiloxane is then reduced using a palladium-on-carbon catalyst under a hydrogen atmosphere, causing the nitro groups on the pretreated polysiloxane to transform. Aminated polysiloxanes were prepared by reacting acrylic acid and diethanolamine with dicyclohexylcarbodiimide, causing the carboxyl groups on the acrylic acid and the imine on the dicyclohexylcarbodiimide to undergo dehydration reaction, thus obtaining a modifier. The aminated polysiloxane and the modifier were then reacted, causing the Si-H bonds on the aminated polysiloxane and the double bonds on the modifier to undergo reaction, thus obtaining a modified polysiloxane. The modified polysiloxane was then diazotized with sulfuric acid and sodium nitrite to obtain a modified additive.

[0012] The modified dye molecule contains hydroxyl and cyano groups at both ends. The hydroxyl groups can form hydrogen bonds with the hydroxyl oxygen on the acetoxy group of cellulose acetate, and the cyano group is a strongly polar group that can interact with the polar ester group of cellulose acetate. At the same time, the modified dye molecule contains a large number of azo groups, which can improve the saturation and tinting strength of the dye. It also contains organosilicon segments, which can increase the hydrophobicity of the dye. Therefore, the dye on the surface will not fade or fall off after multiple washes. It can also give the film a soft and smooth texture, making the printed area softer and closer to the feel of high-quality embroidery. Detailed Implementation

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Example 1: A disperse dye embroidery-like printing process for acetate fiber fabric, specifically including the following steps: Step A1: Mix N,N-dicyanethylaniline, hydrochloric acid solution and DMF, stir and add modifying additives at a speed of 200 r / min and a temperature of 0℃, react for 20 min, then raise the temperature to 10℃, adjust the pH value to 4, and continue the reaction for 4 h to obtain the modified dye. Step A2: Weigh the following raw materials in the following percentages: 3% modified dye, 1% sodium lignosulfonate, 20% sodium alginate, and 0.5% penetrant JFC, with the remainder being water. Mix the raw materials evenly and adjust the pH value to 5 to obtain the printing dye. Print the printing dye onto the acetate fiber fabric. After steaming for 40 minutes at a temperature of 120℃, wash with water and then set at a temperature of 150℃ to obtain the imitation embroidery printed acetate fiber fabric.

[0015] The ratio of N,N-dicyanoethylaniline, hydrochloric acid solution, and modifying additives in step A1 is 0.02 mol: 4 mL: 0.1 g, and the mass fraction of the hydrochloric acid solution is 37%.

[0016] The modified additive is prepared by the following steps: Step B1: Tetramethylcyclotetrasiloxane, p-nitrostyrene, chloroplatinic acid and DMF are mixed and purged with nitrogen. The mixture is reacted for 6 hours at a speed of 150 r / min and a temperature of 80 °C to obtain the modified monomer. Octamethylcyclotetrasiloxane, the modified monomer, tetramethyldisiloxane, tetramethylammonium hydroxide and DMF are mixed and purged with nitrogen. The mixture is reacted for 3 hours at a speed of 150 r / min and a temperature of 90 °C to obtain the pretreated polysiloxane. Step B2: The pretreated polysiloxane, palladium on carbon catalyst and DMF are mixed evenly, hydrogen is introduced, and the reaction is carried out for 4 hours at a speed of 300 r / min, a temperature of 75℃ and a pressure of 1 MPa to obtain the amino-modified polysiloxane. Acrylic acid, diethanolamine, dicyclohexylcarbodiimide and toluene are mixed and reacted for 3 hours at a speed of 200 r / min and a temperature of 30℃ to obtain the modifier. Step B3: Mix the aminated polysiloxane, modifier, caster catalyst and DMF, purge with nitrogen, and react for 6 hours at 150 r / min and 80 °C to obtain the modified polysiloxane. Mix the modified polysiloxane, sulfuric acid and DMF evenly, stir and add sodium nitrite at 200 r / min and 0 °C, and react for 3 hours to obtain the modified additive.

[0017] In step B1, the molar ratio of tetramethylcyclotetrasiloxane to p-nitrostyrene is 1:4, the amount of chloroplatinic acid is 0.01% of the mass of tetramethylcyclotetrasiloxane, and the molar ratio of octamethylcyclotetrasiloxane, modified monomer, tetramethyldisiloxane and tetramethylammonium hydroxide is 1:0.2:1:1.5.

[0018] The amount of palladium catalyst on carbon mentioned in step B2 is 5% of the mass of the pretreated polysiloxane, and the molar ratio of acrylic acid, diethanolamine and dicyclohexylcarbodiimide is 1:1:1.1.

[0019] In step B3, the molar ratio of the aminated polysiloxane to the modifier is 1:2, the amount of the cassette catalyst is 0.02% of the mass of the modifier, the molar ratio of the amino group, sulfuric acid and sodium nitrite on the modified polysiloxane is 2:8:2.2, and the mass fraction of sulfuric acid is 25%.

[0020] Example 2: A disperse dye embroidery-like printing process for acetate fiber fabric, specifically including the following steps: Step A1: Mix N,N-dicyanethylaniline, hydrochloric acid solution and DMF, stir and add modifying additives at a speed of 200 r / min and a temperature of 3℃, react for 25 min, then raise the temperature to 15℃, adjust the pH value to 4, and continue the reaction for 5 h to obtain the modified dye. Step A2: Weigh the following raw materials in the following percentages: 4% modified dye, 1.5% sodium lignosulfonate, 25% sodium alginate, and 1% penetrant JFC, with the remainder being water. Mix the raw materials evenly and adjust the pH value to 6 to obtain the printing dye. Print the printing dye onto the acetate fiber fabric. After steaming for 45 minutes at a temperature of 125℃, wash with water and then set at a temperature of 155℃ to obtain the imitation embroidery printed acetate fiber fabric.

[0021] The ratio of N,N-dicyanoethylaniline, hydrochloric acid solution, and modifying additives in step A1 is 0.02 mol: 4 mL: 0.1 g, and the mass fraction of the hydrochloric acid solution is 37%.

[0022] The modified additive is prepared by the following steps: Step B1: Tetramethylcyclotetrasiloxane, p-nitrostyrene, chloroplatinic acid and DMF are mixed and purged with nitrogen. The mixture is reacted for 7 hours at a speed of 150 r / min and a temperature of 85 °C to obtain the modified monomer. Octamethylcyclotetrasiloxane, the modified monomer, tetramethyldisiloxane, tetramethylammonium hydroxide and DMF are mixed and purged with nitrogen. The mixture is reacted for 4 hours at a speed of 150 r / min and a temperature of 95 °C to obtain the pretreated polysiloxane. Step B2: The pretreated polysiloxane, palladium on carbon catalyst and DMF are mixed evenly, hydrogen is introduced, and the reaction is carried out for 5 hours at a speed of 500 r / min, a temperature of 75℃ and a pressure of 1.5 MPa to obtain amino-modified polysiloxane. Acrylic acid, diethanolamine, dicyclohexylcarbodiimide and toluene are mixed and reacted for 4 hours at a speed of 200 r / min and a temperature of 35℃ to obtain modifier. Step B3: Mix the aminated polysiloxane, modifier, caster catalyst and DMF, purge with nitrogen, and react for 7 hours at 150 r / min and 85°C to obtain the modified polysiloxane. Mix the modified polysiloxane, sulfuric acid and DMF evenly, stir and add sodium nitrite at 200 r / min and 0°C, and react for 4 hours to obtain the modified additive.

[0023] In step B1, the molar ratio of tetramethylcyclotetrasiloxane to p-nitrostyrene is 1:4, the amount of chloroplatinic acid is 0.01% of the mass of tetramethylcyclotetrasiloxane, and the molar ratio of octamethylcyclotetrasiloxane, modified monomer, tetramethyldisiloxane and tetramethylammonium hydroxide is 1:0.2:1:1.5.

[0024] The amount of palladium catalyst on carbon mentioned in step B2 is 5% of the mass of the pretreated polysiloxane, and the molar ratio of acrylic acid, diethanolamine and dicyclohexylcarbodiimide is 1:1:1.1.

[0025] In step B3, the molar ratio of the aminated polysiloxane to the modifier is 1:2, the amount of the cassette catalyst is 0.02% of the mass of the modifier, the molar ratio of the amino group, sulfuric acid and sodium nitrite on the modified polysiloxane is 2:8:2.2, and the mass fraction of sulfuric acid is 25%.

[0026] Example 3: A disperse dye embroidery-like printing process for acetate fiber fabric, specifically including the following steps: Step A1: Mix N,N-dicyanethylaniline, hydrochloric acid solution and DMF, stir and add modifying additives at a speed of 300 r / min and a temperature of 5℃, react for 30 min, then raise the temperature to 15℃, adjust the pH value to 5, and continue the reaction for 6 h to obtain the modified dye. Step A2: Weigh the following raw materials in the following percentages: 5% modified dye, 2% sodium lignosulfonate, 30% sodium alginate, and 1.5% penetrant JFC, with the remainder being water. Mix the raw materials evenly and adjust the pH value to 6 to obtain the printing dye. Print the printing dye onto the acetate fiber fabric. After steaming for 50 minutes at a temperature of 130℃, wash with water and then set at a temperature of 160℃ to obtain the imitation embroidery printed acetate fiber fabric.

[0027] The ratio of N,N-dicyanoethylaniline, hydrochloric acid solution, and modifying additives in step A1 is 0.02 mol: 4 mL: 0.1 g, and the mass fraction of the hydrochloric acid solution is 37%.

[0028] The modified additive is prepared by the following steps: Step B1: Tetramethylcyclotetrasiloxane, p-nitrostyrene, chloroplatinic acid and DMF are mixed and purged with nitrogen. The mixture is reacted for 8 hours at a speed of 200 r / min and a temperature of 85 °C to obtain the modified monomer. Octamethylcyclotetrasiloxane, the modified monomer, tetramethyldisiloxane, tetramethylammonium hydroxide and DMF are mixed and purged with nitrogen. The mixture is reacted for 5 hours at a speed of 200 r / min and a temperature of 95 °C to obtain the pretreated polysiloxane. Step B2: The pretreated polysiloxane, palladium on carbon catalyst and DMF are mixed evenly, hydrogen is introduced, and the reaction is carried out for 6 hours at a speed of 500 r / min, a temperature of 80℃ and a pressure of 2 MPa to obtain the amino-modified polysiloxane. Acrylic acid, diethanolamine, dicyclohexylcarbodiimide and toluene are mixed and reacted for 5 hours at a speed of 300 r / min and a temperature of 40℃ to obtain the modifier. Step B3: Mix the aminated polysiloxane, modifier, caster catalyst and DMF, purge with nitrogen, and react for 8 hours at 200 r / min and 85°C to obtain modified polysiloxane. Mix the modified polysiloxane, sulfuric acid and DMF evenly, stir and add sodium nitrite at 300 r / min and 0°C, and react for 5 hours to obtain modified additive.

[0029] In step B1, the molar ratio of tetramethylcyclotetrasiloxane to p-nitrostyrene is 1:4, the amount of chloroplatinic acid is 0.01% of the mass of tetramethylcyclotetrasiloxane, and the molar ratio of octamethylcyclotetrasiloxane, modified monomer, tetramethyldisiloxane and tetramethylammonium hydroxide is 1:0.2:1:1.5.

[0030] The amount of palladium catalyst on carbon mentioned in step B2 is 5% of the mass of the pretreated polysiloxane, and the molar ratio of acrylic acid, diethanolamine and dicyclohexylcarbodiimide is 1:1:1.1.

[0031] In step B3, the molar ratio of the aminated polysiloxane to the modifier is 1:2, the amount of the cassette catalyst is 0.02% of the mass of the modifier, the molar ratio of the amino group, sulfuric acid and sodium nitrite on the modified polysiloxane is 2:8:2.2, and the mass fraction of sulfuric acid is 25%.

[0032] Comparative Example 1: This comparative example uses propylene alcohol instead of the modifier compared to Example 1, but the other steps are the same.

[0033] Comparative Example 2: Compared with Example 1, this comparative example uses N,N-dihydroxyethylaniline instead of N,N-dicyanethylaniline, and the other steps are the same.

[0034] Comparative Example 3: This comparative example uses amino-modified polysiloxane instead of modified polysiloxane, while the other steps are the same as in Example 1.

[0035] The acetate fiber fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to a rubbing fastness test according to the standard GB / T3920-2008. The acetate fiber fabrics were washed at a speed of 800 r / min for 20 min, and the surface pattern color was observed after 500 cycles. The test results are shown in Table 1.

[0036] Table 1

[0037] As shown in Table 1, this application has a very good adhesion effect.

[0038] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A disperse dye embroidery-like printing process for acetate fiber fabrics, characterized in that: Specifically, the steps include the following: Step A1: Mix N,N-dicyanethylaniline, hydrochloric acid solution and DMF. Stir and add modifying additives at a speed of 200-300 r / min and a temperature of 0-5℃. After reacting for 20-30 min, raise the temperature to 10-15℃, adjust the pH value to 4-5, and continue the reaction for 4-6 h to obtain the modified dye. Step A2: Weigh the following raw materials in the following percentages: 3-5% modified dye, 1-2% sodium lignosulfonate, 20-30% sodium alginate, and 0.5-1.5% penetrant JFC, with the remainder being water. Mix the raw materials evenly and adjust the pH value to 5-6 to obtain the printing dye. Print the printing dye onto the acetate fiber fabric. After steaming for 40-50 minutes at a temperature of 120-130℃, wash with water and then set at a temperature of 150-160℃ to obtain the imitation embroidery printed acetate fiber fabric.

2. The disperse dye imitation embroidery printing process for acetate fiber fabric according to claim 1, characterized in that: The ratio of N,N-dicyanoethylaniline, hydrochloric acid solution, and modifying additives in step A1 is 0.02 mol: 4 mL: 0.1 g, and the mass fraction of the hydrochloric acid solution is 37%.

3. The disperse dye imitation embroidery printing process for acetate fiber fabric according to claim 1, characterized in that: The modified additive is prepared by the following steps: Step B1: Mix tetramethylcyclotetrasiloxane, p-nitrostyrene, chloroplatinic acid and DMF, purge with nitrogen, and react for 6-8 hours at a speed of 150-200 r / min and a temperature of 80-85℃ to obtain the modified monomer. Mix octamethylcyclotetrasiloxane, the modified monomer, tetramethyldisiloxane, tetramethylammonium hydroxide and DMF, purge with nitrogen, and react for 3-5 hours at a speed of 150-200 r / min and a temperature of 90-95℃ to obtain the pretreated polysiloxane. Step B2: Mix the pretreated polysiloxane, palladium on carbon catalyst and DMF evenly, introduce hydrogen gas, and react for 4-6 hours at a rotation speed of 300-500 r / min, a temperature of 75-80℃ and a pressure of 1-2 MPa to obtain amino-modified polysiloxane. Mix acrylic acid, diethanolamine, dicyclohexylcarbodiimide and toluene, and react for 3-5 hours at a rotation speed of 200-300 r / min and a temperature of 30-40℃ to obtain modifier. Step B3: Mix the aminated polysiloxane, modifier, caster catalyst and DMF, purge with nitrogen for protection, and react for 6-8 hours at a speed of 150-200 r / min and a temperature of 80-85℃ to obtain the modified polysiloxane. Mix the modified polysiloxane, sulfuric acid and DMF evenly, stir and add sodium nitrite at a speed of 200-300 r / min and a temperature of 0℃, and react for 3-5 hours to obtain the modified additive.

4. The disperse dye imitation embroidery printing process for acetate fiber fabric according to claim 3, characterized in that: In step B1, the molar ratio of tetramethylcyclotetrasiloxane to p-nitrostyrene is 1:4, the amount of chloroplatinic acid is 0.01% of the mass of tetramethylcyclotetrasiloxane, and the molar ratio of octamethylcyclotetrasiloxane, modified monomer, tetramethyldisiloxane and tetramethylammonium hydroxide is 1:0.2:1:1.

5.

5. The disperse dye imitation embroidery printing process for acetate fiber fabric according to claim 3, characterized in that: The amount of palladium catalyst on carbon mentioned in step B2 is 5% of the mass of the pretreated polysiloxane, and the molar ratio of acrylic acid, diethanolamine and dicyclohexylcarbodiimide is 1:1:1.

1.

6. The disperse dye imitation embroidery printing process for acetate fiber fabric according to claim 3, characterized in that: In step B3, the molar ratio of the aminated polysiloxane to the modifier is 1:2, the amount of the cassette catalyst is 0.02% of the mass of the modifier, the molar ratio of the amino group, sulfuric acid and sodium nitrite on the modified polysiloxane is 2:8:2.2, and the mass fraction of sulfuric acid is 25%.

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