WO2024016449A1

WO2024016449A1 - Direct-injection-type printing ink, and preparation method therefor and use thereof

Info

Publication number: WO2024016449A1
Application number: PCT/CN2022/118358
Authority: WO
Inventors: 常广涛; 董颖苹; 李若欣; 陈玉锋; 聂伦; 李燕
Original assignee: 苏州大学
Priority date: 2022-07-19
Filing date: 2022-09-13
Publication date: 2024-01-25
Also published as: CN115260833A

Abstract

Disclosed in the present invention is direct-injection-type printing ink, which comprises a dye/pigment, an auxiliary agent and water. The direct-injection-type printing ink further comprises an ultraviolet-curable monomer and a photo-initiator. The dye comprises a reactive dye, an acid dye and a disperse dye. The direct-injection-type printing ink of the present invention does not need to pretreat a fabric, and fabric printing is clear, such that sewage discharge is effectively reduced, the production efficiency is high, and the direct-injection-type printing ink has the characteristics of being green and environmentally friendly.

Description

A direct-injection printing ink and its preparation method and application

Technical field

The invention relates to the technical field of digital inkjet printing, and specifically relates to a direct injection printing ink and its preparation method and application.

Background technique

With the continuous adjustment of the industrial structure of my country's printing and dyeing industry, the accelerating pace of technological progress, and the upgrading of terminal consumption methods, the application scope of digital inkjet printing continues to expand, and the product types are more abundant. From the original small batches and multiple batches to the application With industrialized mass production, the trend of replacing traditional printing methods as the mainstream printing and dyeing technology has become increasingly prominent.

Digital printing, also known as digital direct-jet printing or digital inkjet printing, uses digital technology to print on various textiles. The processing process is simply to input the image into the computer through various digital means and print it through the printing software. After the system is edited and processed, the required pattern is formed, and then the output software controls the inkjet printer to directly print various special printing inks onto various fabrics. Then, after steam fixation, it is placed in a water tank for desizing and defloating. Color processing to obtain printed textiles with high-precision patterns.

Due to the characteristics of the fabric itself, printing inks used for digital printing can also be divided into reactive, acidic, disperse dye types and paint types. Reactive printing ink is mainly used for silk and cotton fabric printing. It has the advantages of high color fastness, complete color spectrum and bright color of printed products. Acid dyes are usually used for dyeing or printing wool, nylon and silk. They are used under acidic conditions and generally do not have hydrolysis problems. Their inkjet printing is similar to traditional textile printing. Disperse dyes have the characteristics of complete color spectrum, bright color, high fastness and not easy to decompose. They are most commonly used in polyester dyeing and printing. Coating ink, also known as pigment ink, is another large type of pigment material. It is insoluble in water and common organic solvents. It usually exists in the form of particles to express color on objects. However, the pigment itself cannot dye the fiber, and a binder is needed to achieve the coloring effect. Compared with dye ink inkjet printing, pigment ink inkjet printing has obvious advantages. Dye ink selects different dye inks according to different fiber needs, while coating ink is suitable for various fiber fabrics and is widely used in blended fabrics. Paint ink does not require evaporation and washing, no sewage is generated, it is energy-saving and environmentally friendly, and its pigment chromatography is complete, making color matching easy.

When the various dyes mentioned above are directly used in digital inkjet printing, there will be problems with ink bleeding, resulting in unclear printing. Therefore, before inkjet printing, the fabric also needs to be pre-treated such as sizing. However, the pretreatment process is long and complicated, and the pretreatment liquid in the formula contains organic solvents, which is harmful to the environment.

Contents of the invention

The technical problem to be solved by the present invention is to provide a direct-injection printing ink and a preparation method thereof. The ink does not require pre-treatment of fabrics, has clear fabric printing, effectively reduces sewage discharge, has high production efficiency, and is green and environmentally friendly. characteristic.

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

The invention provides a direct-injection printing ink, which includes dyes/pigments, auxiliaries and water. The direct-injection printing ink also includes ultraviolet curing monomers and photoinitiators.

In order to solve the bleeding problem of inkjet printing, the traditional method is to first pretreat the fabric to improve the quality of inkjet printing. However, the pretreatment process is long and complicated, and the pretreatment liquid in the formula contains organic solvents, which is harmful to the environment. In order to solve this technical problem, the present invention adds a certain amount of photosensitive resin to the formula of the printing ink, and uses the photosensitive resin to undergo cross-linking polymerization reaction under light, so that the viscosity of the ink increases during the process of falling onto the fabric, inhibiting It prevents the ink from seeping into the fabric, effectively improving the resolution of the printed pattern. Using this kind of printing ink for inkjet printing does not require pretreatment of the fabric, which not only simplifies the inkjet printing process but also reduces pollution during the pretreatment process.

In the present invention, the ultraviolet light curable monomer is preferably a water-soluble ultraviolet light curable monomer. The water-soluble ultraviolet light curable monomer can be suitable for aqueous ink systems, thereby reducing pollution caused by the use of organic solvents. The present invention is not limited to the type of water-soluble UV-curable monomer, including but not limited to polyethylene glycol diacrylate, ethoxyethoxyethyl acrylate, polyethylene glycol dimethacrylate and acrylic acid. One or more morpholines.

In the present invention, the mass percentage of ultraviolet curable monomer in the direct-injection printing ink is preferably 2-20%, for example, it can be 2%, 4%, 5%, 6%, 8%, 10%, 12% , 14%, 15%, 16%, 18%, 20%, etc.

In the present invention, the photoinitiator is a compound that can initiate cross-linking and curing of the above-mentioned ultraviolet curable monomer, and it is preferably a water-soluble photoinitiator. The present invention is not limited to the specific type of water-soluble photoinitiator, including but not limited to 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, phenyl-2,4,6 - One or more types of lithium trimethylbenzoylphosphite.

In the present invention, the mass percentage of the photoinitiator in the direct-injection printing ink is preferably 0.1-5%, for example, it can be 0.1%, 0.2%, 0.5%, 0.6%, 0.8%, 1.0%, 1.5%, 2.0 %, 2.5%, 3.0%, 4.0%, 5.0%, etc.

Preferably, the above-mentioned auxiliary agent includes a bactericide, and its content is preferably 0.1-1%, for example, it can be 0.1%, 0.2%, 0.3%, 0.5%, 0.6%, 0.8%, 1.0%, etc. Since the inkjet printing ink of the present invention is a water-based ink, and water provides a good environment for the growth of microorganisms, biological mildew of the ink will cause clogging of the nozzles. Therefore, by adding a certain amount of bactericide, the growth of bacteria in the ink can be inhibited. The fungicides include but are not limited to benzoate, sorbitol, 2-methyl-4-isothiazolin-3-one, 2-benzisothiazolin-3-one and other commonly used fungicides.

The dyes in the direct-injection printing ink of the present invention can be reactive dyes, acid dyes, disperse dyes, or paint inks.

For reactive dye inks, the digital printing technology requires previous processing, printing, and then color fixation and washing. The so-called pre-treatment is usually called sizing treatment. In order to avoid the problem of ink bleeding and unclear printing, sodium alginate, alkali and urea are usually mixed in water to make a slurry, which is evenly applied to the surface of the fabric, dried and flat rolled. Only then can the machine be used for the subsequent digital printing process. The process of "pre-treatment, printing, and then color fixation and washing" is not only cumbersome and time-consuming, especially the sizing process, which consumes water resources and efficacy, but also requires a subsequent washing process, which pollutes the environment.

For reactive dyes, the present invention provides a direct-injection reactive dye ink, which includes the following components in mass percentage: reactive dye 0.5-10%, ultraviolet curable monomer 2%-20%, photoinitiator 0.1 -1%, humectant 5-25%, fixing agent 1-10%, pH adjuster 0.1-5%, defoaming agent 0.1-1%, fixing aid 2-8%, and the balance water.

In the above-mentioned direct injection reactive dye ink, the reactive dye is a high-purity salt-free liquid reactive dye powder. Commonly used inkjet printing dyes include cyan, red, yellow and black dyes.

In the above-mentioned direct injection reactive dye ink, the fixing agent is preferably one or more of aqueous cationic resin and self-crosslinking water-soluble acrylic resin. Among them, water-based cationic resins include, but are not limited to, cationic quaternary ammonium-type color-fixing agents, cationic primary amine-type color-fixing agents, cationic secondary ammonium-type color-fixing agents, cationic tertiary ammonium-type color-fixing agents, etc. The fixation aid is preferably one or more of urea, ethylene urea and ethylene urea.

In the above direct injection reactive dye ink, the moisturizing agent is preferably one or more of diethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol and glycerol. The pH adjuster is preferably one or more of monoethanolamine, diethanolamine, and triethanolamine. The defoaming agent is preferably surfynol 465.

The above-mentioned direct injection reactive dye ink can be prepared by the following method: dissolve the photoinitiator in water, then slowly add the reactive dye, ultraviolet curable monomer, moisturizer, pH regulator and defoaming agent, and stir well to obtain Mix the solution; filter the mixed solution through an aqueous filter membrane to obtain the direct injection reactive dye ink. Preferably, the mixed solution is filtered through 0.8 μm, 0.45 μm and 0.2 μm aqueous filter membranes in sequence.

In order to prevent the UV-curable monomer in the ink from polymerizing when exposed to light, strict light-proof conditions are required throughout the ink preparation process.

In addition, the application of the above-mentioned direct-injection reactive dye ink in digital textile printing includes the following steps: direct ink-jet printing of the direct-injection reactive dye ink on untreated fabrics through a UV digital textile printing machine. The printed fabric is dried and then steamed to solidify the color.

In the above inkjet application method, examples of UV light sources include mercury lamps (ultra-high pressure mercury lamps, high pressure mercury lamps, medium pressure mercury lamps, low pressure mercury lamps, etc.), metal halide lamps, gas lasers, solid lasers, etc. From an environmental point of view, the preferred light source is ultraviolet LED (UV-LED).

In the above inkjet application method, the preferred drying temperature is 60°C, the preferred steam fixing temperature is 100-105°C, and the steam fixing time is 5-10 minutes.

For acid dye inks, there is also the problem of inkjet bleeding, and the fabric must first be pretreated to improve the quality of inkjet printing.

For acid dyes, the present invention provides a direct-injection acid dye ink, which does not require pretreatment of fabrics during digital inkjet printing. Specifically, the direct-injection acid dye ink includes the following components in mass percentage: 0.5-10% acid dye, 2%-20% UV curable monomer, 0.1-1% photoinitiator, 5-5% moisturizer 25%, color fixing aid 1-5%, pH adjuster 0.1-5%, and the balance water.

In the above direct injection acid dye ink, the acid dyes include but are not limited to C.I. Acid Yellow 117, C.I. Acid Yellow 23, C.I. Acid Yellow 42, C.I. Acid Yellow 49, C.I.C.I. Acid Red 266, C.I. Acid Red 18; C.I. Acid Blue 227. C.I. acid blue 7, C.I. acid blue 62, C.I. acid blue 350, C.I. acid blue 80, C.I. acid blue 62; C.I. acid black 26, C.I. acid black 194, C.I. acid black 210, C.I. acid black 168, C.I. acid black 234; one or more of C.I. Acid Orange 10, C.I. Acid Orange 67, C.I. Acid Orange 116.

In the above-mentioned direct injection acid dye ink, the color fixing aid is preferably one or more of polyethyleneimine, ammonium tartrate, urea, and ethylene urea.

In the above-mentioned direct injection acid dye ink, the moisturizing agent is preferably one or more of diethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol and glycerol. The pH adjuster is preferably one or more of monoethanolamine, diethanolamine, and triethanolamine.

The above-mentioned direct injection acid dye ink can be prepared by the following method: dissolve the photoinitiator in water, then slowly add acid dye, ultraviolet curable monomer, moisturizer, color fixing agent and pH regulator, and mix well Finally, a mixed solution is obtained; the mixed solution is filtered through a nylon membrane to obtain the direct injection acid dye ink. Preferably, the mixed solution is filtered through 0.45 μm and 0.2 μm nylon membranes in sequence. In order to prevent the UV-curable monomer in the ink from polymerizing when exposed to light, strict light-proof conditions are required throughout the ink preparation process.

In addition, the application of the direct injection acid dye ink of the present invention in digital textile printing includes the following steps: direct inkjet printing of the direct injection acid dye ink on untreated fabrics through a UV digital textile printing machine , the printed fabric is dried and then steamed to solidify the color. Preferably, the drying temperature is 60°C, and the steam fixation temperature is 110°C-120°C.

As for disperse dyes, they are most commonly used for dyeing and printing polyester. However, because polyester fabrics are generally hydrophobic, ink droplets tend to spread along the warp and weft directions of the fabric, causing the problem of poor inkjet printing clarity. In order to obtain better printing quality, the fabric generally needs to be pre-treated such as sizing or thermal transfer printing. Existing disperse dye direct-jet inkjet printing eliminates the need for transfer paper and causes little environmental pollution. However, in order to improve the printing quality, complex pre-treatment processes are generally required for fabrics, which results in lengthy and complicated processes and waste of water resources. and other problems, which are not conducive to environmental protection. At present, most of the technical solutions for dispersive direct-injection technology add thickeners to the ink to eliminate the pre-treatment process of the fabric. However, most of the thickeners used are not biodegradable and are harmful to human skin and the environment.

For disperse dyes, the present invention provides a direct-injection disperse dye ink, which does not require pre- and post-treatment of fabrics, has clear fabric printing, simple and convenient process, and is friendly to workers and the environment. Specifically, the direct-injection disperse dye ink includes the following components in mass percentage: disperse dye 0.5-15%, dispersant 0.5%-10%, ultraviolet curable monomer 2-20%, photoinitiator 0.1-10%. 1%, humectant 5-25%, defoamer 0.1-1%, and the balance water.

In the above-mentioned direct injection disperse dye ink, the disperse dye can be blue, red, yellow, etc. You can choose C.I. Disperse Blue 14, 20, 56, 60, 72, 73, 79, 87, 115, 158, 165, 183, 291, 359, etc. or a mixture of several types of blue. For red, you can choose one or a mixture of C.I. Disperse Red 4, 11, 50, 54, 60, 74, 92, 152, 153, 167, 177, 179, 343, etc. For yellow, you can choose one or a mixture of C.I. Disperse Yellow 42, 54, 114, 119, 134, 163, 211, etc., or one or more C.I. Disperse Orange 29, 30, 31, 36, 44, 73, 76, 288, etc. A mix of several.

In the above-mentioned direct injection disperse dye ink, the dispersant includes anionic dispersant and nonionic dispersant with a carbon chain length of 6-18, such as dispersant MF. The moisturizing agent is preferably one or more of diethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol and glycerol. The defoaming agent is preferably surfynol 465.

The above-mentioned direct-injection dispersion ink can be prepared by the following method: (1) adding the disperse dye, dispersant, and moisturizer into water and mixing thoroughly, and then grinding the mixture to obtain a disperse dye paste; (2) then Stir and mix the color paste, ultraviolet curable monomer, photoinitiator, moisturizer, and defoaming agent to obtain the dispersed direct-injection ink. In order to prevent the UV-curable monomer in the ink from polymerizing when exposed to light, strict light-proof conditions are required throughout the ink preparation process.

In addition, the present invention also provides the application of the above-mentioned direct-injection dispersed ink in digital textile printing, which includes the following steps: directly ink-jet the dispersed direct-injection ink on untreated fabrics through a UV digital textile printing machine. Printing; dry the printed polyester fabric; steam the dried printed polyester fabric to fix the color. Among them, the better steam fixation temperature is 180-210℃, and the steaming time is 2min-6min.

For coating inks, in order to improve the printing quality, it is often necessary to sizing the fabric before inkjet printing on the fabric and apply a uniform layer of paste on the surface of the fabric. Sizing the fabric will not only affect the feel, hygroscopicity, and breathability of the fabric, but the use of sizing slurry will also pollute the environment and waste a lot of water resources, and the pretreatment process will also require a lot of human resources.

The invention provides a direct-injection coating ink that does not require pretreatment of fabrics, has clear fabric printing, simple and convenient process flow, and is environmentally friendly. The direct-injection coating ink includes the following components in mass percentage: 20-40% pigment paste, 0.5%-10% dispersant, 5%-20% polymer binder, 2-20% UV curing monomer %, photoinitiator 0.1-5%, humectant 5-25%, pH adjuster 0.1-10%, defoaming agent 0.1-1%, and the balance water.

In the above-mentioned direct injection coating ink, the pigments in the pigment paste include but are not limited to black pigments, red pigments, blue pigments and yellow pigments.

In the above-mentioned direct-injection coating ink, the dispersant is preferably a high molecular weight block copolymer solution containing pigment affinity groups, such as BYK190.

Since the pigment itself cannot dye the fiber, a binder is needed to achieve the coloring effect. Therefore, a certain amount of polymer binder is added to the coating ink, which acts as an adhesive. Completely opposite to the principle that dye ink penetrates into the gaps between the molecules of the medium and then precipitates to form color. Paint ink is attached to the surface of the medium (such as copy paper) in a physical form (using a high molecular polymer as a binder) through a colorant (pigment). or printing materials, etc.). In the present invention, the polymer connecting material is preferably water-based polyurethane and/or water-based acrylic resin.

In the above direct-injection coating ink, the moisturizing agent is preferably one or more of diethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol and glycerol; the pH regulator is preferably ethanolamine, diethanolamine, and triethanolamine. One or more of them; the defoaming agent is preferably Surfnol465.

The above-mentioned direct injection coating ink can be prepared by the following method: dissolve the photoinitiator in water, and then slowly add pigment paste, polymer binder, humectant, pH regulator, UV curing monomer and defoaming agent , stir evenly to obtain a mixed solution; filter the mixed solution through an aqueous filter membrane to obtain the direct injection textile coating ink. Preferably, the mixed solution is filtered through 0.8 μm, 0.45 μm and 0.2 μm aqueous membranes in sequence. In order to prevent the UV-curable monomer in the ink from polymerizing when exposed to light, strict light-proof conditions are required throughout the ink preparation process.

In addition, the present invention provides the application of the above-mentioned direct-injection coating ink in digital textile printing, which includes the following steps: direct ink-jet printing on untreated fabrics by using the direct-injection coating ink on a UV digital textile printing machine. , the printed fabric is dried and then steamed to solidify the color.

In the inkjet application method of the present invention, examples of UV light sources include: mercury lamps (ultra-high pressure mercury lamps, high pressure mercury lamps, medium pressure mercury lamps, low pressure mercury lamps, etc.), metal halide lamps, gas lasers, solid lasers wait. From an environmental point of view, the preferred light source is ultraviolet LED (UV-LED).

In the inkjet application method of the present invention, the preferred drying temperature is 60°C, the preferred steam fixing temperature is 140-160°C, and the time is 5-10 minutes.

Compared with the prior art, the beneficial effects of the present invention are:

1. The direct-injection printing ink of the present invention is a water-soluble system, the ink formula is simple and reasonable, and it avoids pollution caused by the volatilization of organic solvents.

2. The direct-injection printing ink of the present invention contains water-soluble photosensitive resin. The photosensitive resin is cross-linked and polymerized under light. The viscosity of the ink increases during the process of falling onto the fabric, which inhibits the ink from bleeding on the fabric and is effective. Significantly improves inkjet printing quality.

3. The direct-injection printing ink of the present invention does not require pre-treatment, which saves production costs, simplifies the production process of ink-jet printing, reduces sewage discharge during pre-treatment, and meets the requirements of low-carbon and sustainable development of the printing and dyeing industry.

Description of drawings

Figure 1 is a comparison chart of the pattern effects of the acid blue direct-injection ink (b) provided in Example 6 of the present invention and the ink (a) of Comparative Example 2 for inkjet printing.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific examples, so that those skilled in the art can better understand and implement the present invention, but the examples are not intended to limit the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terminology used herein in the description of the invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The experimental methods used in the following examples are conventional methods unless otherwise specified, and the materials, reagents, etc. used can be obtained from commercial sources unless otherwise specified.

Clarity and Penetration Test:

1. Visual inspection. Visually observe whether the printed pattern on the printed fabric is clear.

2. In the digital printing software, set the printing line width to 1cm. Use an ultra-depth-of-field microscope, select a low-power magnifying glass, take photos after printing at 100 times, and use line width measurement software to measure the actual printed line width of the fabric. The penetration rate refers to the degree of penetration of the ink into the yarn, according to the following formula Calculate permeability:

Permeability rate (%) = (measurement width - setting width) / setting width × 100%,

The smaller the permeation rate value is, the closer the measured width is to the printing width, the better the anti- permeation performance, and the clearer the printing pattern.

Apparent depth (K/S value): Use a color measuring and matching instrument to evaluate the color yield of the fabric based on the K/S value. Test 4 points and take the average value. The larger the K/S value, the darker the color. .

1. Direct injection reactive dye ink

Example 1

The reactive blue pre-treatment-free direct-injection ink of this embodiment is made of the following mass percentage raw materials: C.I. reactive blue 145%; polyethylene glycol diacrylate 8%; phenyl-2,4,6-trimethyl Lithium benzoyl phosphite 0.2%; ethylene glycol 10%; diethylene glycol 5%; cationic quaternary ammonium fixative 5%; diethanolamine 0.5%; surfynol 46 0.5%, urea 5%, the rest is deionized water.

The preparation method of the above-mentioned reactive blue pre-treatment-free direct-injection ink includes the following steps:

At 20-40°C and stirring speed of 200-400 rpm, add phenyl-2,4,6-trimethylbenzoyl lithium phosphite into deionized water while stirring, and mechanically stir to form a transparent solution. Add C.I. reactive blue 14, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, cationic quaternary ammonium fixative, diethanolamine, urea and surfynol 465 respectively to obtain a mixed solution. Pass the mixed solution through 0.8μm and 0.45μm and 0.2 μm aqueous filter membrane to obtain the pretreatment-free direct injection reactive dye ink.

The specific application of the above-mentioned pre-treatment-free direct-jet reactive dye ink is: use the pre-treatment-free direct-jet reactive dye ink for direct inkjet printing on a water-based UV digital textile printing machine on untreated cotton fabrics, and then The printed cotton fabric is dried and fixed at a drying temperature of 60°C and a steam fixing temperature of 102°C for 3 minutes to obtain a blue printed cotton fabric.

Example 2

The reactive red pre-treatment-free direct-injection ink of this embodiment is made of the following mass percentage raw materials: C.I. reactive red 1955%; polyethylene glycol diacrylate 8%; phenyl-2,4,6-trimethyl Lithium benzoyl phosphite 0.2%; ethylene glycol 10%; diethylene glycol 5%; cationic quaternary ammonium fixative 5%; diethanolamine 0.5%; surfynol 46 0.5%, urea 5%, the rest is deionized water.

The preparation method of the above-mentioned reactive red pre-treatment-free direct-injection ink includes the following steps:

At 20-40°C and stirring speed of 200-400 rpm, add phenyl-2,4,6-trimethylbenzoyl lithium phosphite into deionized water while stirring, and mechanically stir to form a transparent solution. Add C.I. reactive red 195, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, cationic quaternary ammonium color fixing agent, diethanolamine, urea and surfynol 465 respectively to obtain a mixed solution. Pass the mixed solution through 0.8μm and 0.45μm and 0.2 μm aqueous filter membrane to obtain the pretreatment-free direct injection reactive dye ink.

The specific application of the above-mentioned pre-treatment-free direct-jet reactive dye ink is: use the pre-treatment-free direct-jet reactive dye ink for direct inkjet printing on a water-based UV digital textile printing machine on untreated cotton fabrics, and then The printed cotton fabric is dried and fixed at a drying temperature of 60°C and a steam fixing temperature of 102°C for 3 minutes to obtain a red printed cotton fabric.

Example 3

The reactive yellow pre-treatment-free direct-injection ink of this embodiment is made of the following mass percentage raw materials: C.I. reactive yellow 1865%; polyethylene glycol diacrylate 8%; phenyl-2,4,6-trimethyl Lithium benzoyl phosphite 0.2%; ethylene glycol 10%; diethylene glycol 5%; cationic quaternary ammonium fixative 5%; diethanolamine 0.5%; surfynol 46 0.5%, urea 5%, the rest is deionized water.

The preparation method of the above-mentioned reactive yellow pre-treatment-free direct-injection ink includes the following steps:

At 20-40°C and stirring speed of 200-400 rpm, add phenyl-2,4,6-trimethylbenzoyl lithium phosphite into deionized water while stirring, and mechanically stir to form a transparent solution. Add C.I. reactive yellow 186, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, cationic quaternary ammonium fixative, diethanolamine, urea and surfynol 465 respectively to obtain a mixed solution. Pass the mixed solution through 0.8μm and 0.45μm and 0.2 μm aqueous filter membrane to obtain the pretreatment-free direct injection reactive dye ink.

The specific application of the above-mentioned pre-treatment-free direct-jet reactive dye ink is: use the pre-treatment-free direct-jet reactive dye ink for direct inkjet printing on a water-based UV digital textile printing machine on untreated cotton fabrics, and then The printed cotton fabric is dried and fixed at a drying temperature of 60°C and a steam fixing temperature of 102°C for 3 minutes to obtain a yellow printed cotton fabric.

Example 4

The reactive black pre-treatment-free direct-injection ink of this embodiment is made of the following mass percentage raw materials: C.I. reactive black 55%; polyethylene glycol diacrylate 8%; phenyl-2,4,6-trimethyl Lithium benzoyl phosphite 0.2%; ethylene glycol 10%; diethylene glycol 5%; cationic quaternary ammonium fixative 5%; diethanolamine 0.5%; surfynol 46 0.5%, urea 5%, the rest is deionized water.

The preparation method of the above-mentioned reactive black pre-treatment-free direct-injection ink includes the following steps:

At 20-40°C and stirring speed of 200-400 rpm, add phenyl-2,4,6-trimethylbenzoyl lithium phosphite into deionized water while stirring, and mechanically stir to form a transparent solution. Add C.I. reactive black 5, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, cationic quaternary ammonium color fixing agent, diethanolamine, urea and surfynol 465 respectively to obtain a mixed solution. Pass the mixed solution through 0.8μm and 0.45μm and 0.2 μm aqueous filter membrane to obtain the pretreatment-free direct injection reactive dye ink.

The specific application of the above-mentioned pre-treatment-free direct-jet reactive dye ink is: use the pre-treatment-free direct-jet reactive dye ink for direct inkjet printing on a water-based UV digital textile printing machine on untreated cotton fabrics, and then The printed cotton fabric is dried and fixed at a drying temperature of 60°C and a steam fixing temperature of 102°C for 3 minutes to obtain a black printed cotton fabric.

Example 5

The reactive red pre-treatment-free direct-injection ink of this embodiment is made of the following mass percentage raw materials: C.I. reactive red 1955%; polyethylene glycol diacrylate 8%; phenyl-2,4,6-trimethyl Lithium benzoyl phosphite 1%; ethylene glycol 10%; diethylene glycol 5%; cationic quaternary ammonium color fixing agent 5%; diethanolamine 0.5%; the rest is deionized water.

The preparation and application of the reactive red pretreatment-free direct-injection ink in this embodiment are the same as those in Embodiment 2.

Comparative example 1

The reactive red pre-treatment-free direct-injection ink of this comparative example is made of the following mass percentage raw materials: C.I. reactive red 1955%; polyethylene glycol diacrylate 8%; ethylene glycol 10%; diethylene glycol 5% ; Cationic quaternary ammonium fixative 5%; diethanolamine 0.5%; surfynol 46 0.5%, urea 5%, the rest is deionized water.

The preparation and application of the reactive red pre-treatment-free direct-injection ink of this comparative example are the same as those in Example 2. The difference is that in the specific application, the UV lamp of the water-based UV digital textile printing machine is turned off to obtain red printed cotton fabric.

Conduct conductivity, surface tension, viscosity, intermittent printing effect and cold resistance tests on the inks of the above Examples 1-5 and Comparative Example 1, and evaluate the pattern clarity and penetration rate of the direct-injection digitally printed fabrics. Test The results are shown in Table 1.

Table 1 Inks of Examples 1-5 and Comparative Example 1 and their printed fabric evaluation results

It can be seen from the results in Table 1 that the pretreatment-free direct-injection reactive dye inks of Examples 1-5 have good storage stability and jettability, and meet the basic requirements for ink performance. Compared with Comparative Example 1, the pre-treatment-free direct-injection reactive dye ink provided by the present invention prints clearly, and the bleeding rate can be reduced by up to 82%. Therefore, the pretreatment-free direct-injection ink of the present invention can inhibit the bleeding of inkjet without pretreatment of fabrics, improve the printing clarity, and also simplify the inkjet printing process, reduce printing costs, and is in line with printing and dyeing. Industry energy conservation and emission reduction requirements.

2. Direct injection acid dye ink

Example 6

The acid yellow direct-injection ink of this embodiment is made of the following mass percentage raw materials: C.I. acid blue 75%; polyethylene glycol diacrylate 8%; phenyl-2,4,6-trimethylbenzyl Lithium acyl phosphite 0.1%; ethylene glycol 10%; diethylene glycol 5%; polyethyleneimine 4%; urea 5%; triethanolamine 0.5%; the rest is deionized water.

The preparation method of the above-mentioned acid blue direct injection ink includes the following steps:

First, dissolve phenyl-2,4,6-trimethylbenzoyl lithium phosphite in deionized water, stir mechanically to form a transparent solution, and then add C.I. Acid Blue 7, polyethylene glycol diacrylate, and ethylene glycol respectively. Diol and diethylene glycol, polyethyleneimine and urea, triethanolamine and 2-methyl-4-isothiazolin-3-one are mixed at 20-40°C and 200r/min for 1-4h. solution, and filter the mixed solution through 0.45 μm and 0.2 μm nylon membranes to obtain the direct injection acid dye ink.

The specific application of the above-mentioned direct-injection acid dye ink is: on untreated nylon fabric, the direct-injection acid dye ink is used for direct inkjet printing on a water-based UV digital textile printing machine, and then the printed nylon fabric is After drying, steam to fix the color. The drying temperature is 60°C and the steaming temperature is 105°C to obtain the acid blue nylon fabric.

Comparative example 2

The formula, preparation method and application of the ink in Comparative Example 2 are basically the same as those in Example 6. The difference is that the photoinitiator in the acid blue direct-injection ink is replaced with deionized water, and the water-based UV digital textile printing machine is turned off during its application. of UV lamp.

Example 7

The acid red direct-injection ink of this embodiment is made of the following mass percentage raw materials: C.I. acid red 185%; polyethylene glycol diacrylate 8%; phenyl-2,4,6-trimethylbenzyl Lithium acyl phosphite 0.1%; ethylene glycol 10%; diethylene glycol 5%; polyethyleneimine 4%; urea 5%; triethanolamine 0.5%; the rest is deionized water.

The preparation method of the above-mentioned acid red direct injection ink includes the following steps:

First, dissolve lithium phenyl-2,4,6-trimethylbenzoylphosphite in deionized water and stir mechanically to form a transparent solution. Then add C.I. Acid Red 18, polyethylene glycol diacrylate, and ethylene glycol respectively. Diol and diethylene glycol, polyethyleneimine and urea, triethanolamine and 2-methyl-4-isothiazolin-3-one are mixed at 20-40°C and 200r/min for 1-4h. solution, and filter the mixed solution through 0.45 μm and 0.2 μm nylon membranes to obtain the direct injection acid dye ink.

The specific application of the above-mentioned direct-injection acid dye ink is: on untreated nylon fabric, the direct-injection acid dye ink is used for direct inkjet printing on a water-based UV digital textile printing machine, and then the printed nylon fabric is After drying, steam to fix the color. The drying temperature is 60°C and the steaming temperature is 105°C to obtain the acid red nylon fabric.

Example 8

The acid yellow direct-injection ink of this embodiment is made of the following mass percentage raw materials: C.I. acid yellow 1175%; polyethylene glycol diacrylate 8%; phenyl-2,4,6-trimethylbenzyl Lithium acyl phosphite 0.1%; ethylene glycol 10%; diethylene glycol 5%; polyethyleneimine 4%; urea 5%; triethanolamine 0.5%; the rest is deionized water.

The preparation method of the above-mentioned acid yellow direct-injection ink includes the following steps:

First, dissolve phenyl-2,4,6-trimethylbenzoyl lithium phosphite in deionized water, stir mechanically to form a transparent solution, and then add C.I. Acid Yellow 117, polyethylene glycol diacrylate, and ethylene glycol respectively. Diol and diethylene glycol, polyethyleneimine and urea, triethanolamine and 2-methyl-4-isothiazolin-3-one are mixed at 20-40°C and 200r/min for 1-4h. solution, and filter the mixed solution through 0.45 μm and 0.2 μm nylon membranes to obtain the direct injection acid dye ink.

The specific application of the above-mentioned direct-injection acid dye ink is: on untreated nylon fabric, the direct-injection acid dye ink is used for direct inkjet printing on a water-based UV digital textile printing machine, and then the printed nylon fabric is After drying, steam to fix the color. The drying temperature is 60°C and the steaming temperature is 105°C to obtain acidic yellow nylon fabric.

Example 9

The acid black direct-injection ink of this embodiment is made of the following mass percentage raw materials: C.I. acid black 1945%; polyethylene glycol diacrylate 8%; phenyl-2,4,6-trimethylbenzyl Lithium acyl phosphite 0.1%; ethylene glycol 10%; diethylene glycol 5%; polyethyleneimine 4%; urea 5%; triethanolamine 0.5%; the rest is deionized water.

The preparation method of the above-mentioned acid black direct injection ink includes the following steps:

First, dissolve lithium phenyl-2,4,6-trimethylbenzoylphosphite in deionized water and stir mechanically to form a transparent solution. Then add C.I. Acid Black 194, polyethylene glycol diacrylate, and ethylene glycol respectively. Diol and diethylene glycol, polyethyleneimine and urea, triethanolamine and 2-methyl-4-isothiazolin-3-one are mixed at 20-40°C and 200r/min for 1-4h. solution, filter the mixed solution through 0.45μm and 0.2μm nylon membranes to obtain direct injection acid dye ink.

The specific application of the above-mentioned direct-injection acid dye ink is: on untreated nylon fabric, the direct-injection acid dye ink is used for direct inkjet printing on a water-based UV digital textile printing machine, and then the printed nylon fabric is After drying, steam to fix the color. The drying temperature is 60°C and the steaming temperature is 105°C to obtain acidic black nylon fabric.

Example 10

The acid blue direct-injection ink of this embodiment is made of the following mass percentage raw materials: C.I. acid blue 75%; polyethylene glycol diacrylate 8%; phenyl-2,4,6-trimethylbenzyl Lithium acyl phosphite 0.2%; ethylene glycol 10%; diethylene glycol 5%; polyethyleneimine 4%; urea 5%; triethanolamine 0.5%; the rest is deionized water.

The preparation method and application of the acid blue direct-injection ink in this embodiment are the same as those in Embodiment 6.

The inks prepared in Examples 6-10 and Comparative Example 2 were tested for conductivity, surface tension, viscosity, intermittent printing effect and cold resistance, and the pattern clarity and K/S value of the direct-injection digital printed fabric were tested. The results are shown in Table 2.

Table 2 Test results of the inks prepared in Examples 6-10 and Comparative Example 2 and their printed fabrics

As can be seen from Table 2, the direct injection acid dye inks of Examples 6-10 have good storage stability and jettability, and meet the basic requirements of the ink. Compared with Comparative Example 2, the direct injection acid dye ink provided by the present invention has clear printing and an improved K/S value. Therefore, the dispersed direct-jet ink of the present invention can obtain better printing quality without pretreatment of fabrics, and the printed fabrics can have bright colors and high saturation.

3. Direct injection disperse dye ink

In the following examples and comparative examples, the printed fabric selected is 135g/m polyester fabric.

Example 11

The disperse yellow direct-injection ink of this embodiment is made of the following mass percentage raw materials: 20% disperse dye C.I disperse yellow 54 color paste; 8% polyethylene glycol diacrylate; phenyl-2,4,6- Lithium trimethylbenzoylphosphite 0.5%; ethylene glycol 10%; diethylene glycol 5%; Surfynol 4650.5%; the rest is deionized water.

The preparation method of the above-mentioned dispersed yellow direct-injection ink includes the following steps:

(1) Color paste preparation

Calculated based on mass percentage, add 20% C.I Disperse Yellow 54, 15% dispersant MF, 25% ethylene glycol and diethylene glycol, and 1% surfynol 465 to 15% water at room temperature and mix thoroughly, then mix the mixture in sand. Use zirconium beads with a diameter of 0.35-0.5mm in the mill to grind for 8-10 hours. The sanding speed is 2500rpm. The volume ratio of the sanding beads to the mixture is 1:1.5. Filter out the zirconium beads to obtain disperse dye paste. .

(2) Ink preparation

First, dissolve phenyl-2,4,6-trimethylbenzoyl lithium phosphite in deionized water, stir mechanically to form a transparent solution, and then add the above-mentioned ground disperse dye paste and polyethylene glycol dihydrate respectively. Acrylates, Surfynol 465, ethylene glycol and diethylene glycol. After filtering with a 0.2μm membrane, the dispersed yellow direct-injection ink is obtained.

The specific applications of the above dispersed yellow direct-injection ink are:

1. Printing: On untreated fabrics, use the above dispersed yellow direct-jet ink for direct inkjet printing on a water-based UV digital textile printing machine. The working environment temperature of the equipment is 15°C and the humidity is 20%;

2. Drying: Dry the printed polyester fabric;

3. Steaming: Steam the dried printed polyester fabric to fix the color. The steaming temperature is 180°C and the steaming time is 3 minutes to obtain a yellow printed fabric.

Comparative example 3

According to the formula of Example 11, the ultraviolet curing monomer and photoinitiator in the disperse yellow direct-injection ink were replaced with water to prepare the ink of Comparative Example 3, and its application is the same as that of Example 11.

Example 12

The disperse red direct-injection ink of this embodiment is made of the following mass percentage raw materials: 20% disperse dye C.I disperse red 60 color paste; 8% polyethylene glycol diacrylate; phenyl-2,4,6- Lithium trimethylbenzoylphosphite 0.5%; ethylene glycol 10%; diethylene glycol 5%; Surfynol 4650.5%; the rest is deionized water.

The preparation method of the above-mentioned dispersed red direct-injection ink includes the following steps:

(1) Color paste preparation

Calculated based on mass percentage, add 20% C.I Disperse Red 60, 15% dispersant MF, 25% ethylene glycol and diethylene glycol, and 1% surfynol 465 to 15% water at room temperature and mix thoroughly, then mix the mixture in sand. Use zirconium beads with a diameter of 0.35-0.5mm in the mill to grind for 8-10 hours. The sanding speed is 2500rpm. The volume ratio of the sanding beads to the mixture is 1:1.5. Filter out the zirconium beads to obtain disperse dye paste. .

(2) Ink preparation

First, dissolve phenyl-2,4,6-trimethylbenzoyl lithium phosphite in deionized water, and mechanically stir to form a transparent solution. Then add the above-mentioned ground disperse dye paste and polyethylene glycol diamine. Acrylates, Surfynol 465, ethylene glycol and diethylene glycol. After filtering with a 0.2μm membrane, the dispersed red direct-injection ink is obtained.

The specific applications of the above dispersed red direct-injection ink are:

1. Printing: On untreated fabrics, use the above-mentioned dispersed red direct-jet ink for direct inkjet printing on a water-based UV digital textile printing machine. The working environment temperature of the equipment is 15°C and the humidity is 20%;

2. Drying: Dry the printed polyester fabric;

3. Steaming: Steam the dried printed polyester fabric to fix the color. The steaming temperature is 180°C and the steaming time is 3 minutes to obtain a red printed fabric.

Comparative example 4

According to the formula of Example 12, the ultraviolet curing monomer and photoinitiator in the dispersed red direct-injection ink were replaced with water to prepare the ink of Comparative Example 4. Its application is the same as that of Example 12.

Example 13

The disperse blue direct-injection ink of this embodiment is made of the following mass percentage raw materials: 20% disperse dye C.I disperse blue 60 color paste; 8% polyethylene glycol diacrylate; phenyl-2,4,6- Lithium trimethylbenzoylphosphite 0.5%; ethylene glycol 10%; diethylene glycol 5%; Surfynol 4650.5%; the rest is deionized water.

The preparation method of the above-mentioned dispersed blue direct-injection ink includes the following steps

(1) Color paste preparation

Calculated based on mass percentage, add 20% C.I Disperse Blue 60, 15% dispersant MF, 25% ethylene glycol and diethylene glycol, and 1% surfynol 465 to 15% water at room temperature and mix thoroughly, then mix the mixture in sand. Use zirconium beads with a diameter of 0.35-0.5mm in the mill to grind for 8-10 hours. The sanding speed is 2500rpm. The volume ratio of the sanding beads to the mixture is 1:1.5. Filter out the zirconium beads to obtain disperse dye paste. .

(2) Ink preparation

First, dissolve phenyl-2,4,6-trimethylbenzoyl lithium phosphite in deionized water, stir mechanically to form a transparent solution, and then add the above-mentioned ground disperse dye paste and polyethylene glycol dihydrate respectively. Acrylates, Surfynol 465, ethylene glycol and diethylene glycol. After filtering with a 0.2μm membrane, the dispersed red direct-injection ink is obtained.

The specific applications of the above-mentioned dispersed direct-injection ink are:

1. Printing: On untreated fabrics, use the above dispersed blue direct-jet ink for direct inkjet printing on a water-based UV digital textile printing machine. The working environment temperature of the equipment is 15°C and the humidity is 20%;

2. Drying: Dry the printed polyester fabric;

3. Steaming: Steam the dried printed polyester fabric to fix the color. The steaming temperature is 180°C and the steaming time is 3 minutes to obtain a blue printed fabric.

Comparative example 5

According to the formula of Example 13, the ultraviolet curing monomer and photoinitiator in the dispersed blue direct-injection ink were replaced with water to prepare the ink of Comparative Example 5. Its application is the same as that of Example 13.

Example 14

The dispersed black direct-injection ink of this embodiment is made of the following mass percentage raw materials: 20% compound dispersed black pulp; 8% polyethylene glycol diacrylate; phenyl-2,4,6-trimethyl Benzoylphosphite 0.5%; ethylene glycol 10%; diethylene glycol 5%; Surfynol 46 0.5%; the rest is deionized water.

The preparation method of the above-mentioned dispersed black direct-injection ink includes the following steps:

(1) Color paste preparation

Calculated based on mass percentage, add 20% disperse dye, 15% dispersant, 25% humectant and 1% defoaming agent to 15% water at room temperature and mix thoroughly, then use a 0.35 diameter sand mill to grind the mixed solution - Grind 0.5mm zirconium beads for 8-10 hours, the sanding speed is 2500 rpm, the volume ratio of the sanding beads to the mixture is 1:1.5, filter out the zirconium beads, and obtain the disperse dye paste. Among them, the disperse black dye is composed of C.I Disperse Blue 79, C.I Disperse Red 167 and C.I Disperse Orange 288. The dispersant is dispersant MF, the humectant is ethylene glycol and diethylene glycol, and the defoaming agent is surfynol 465.

(2) Ink preparation

First, dissolve phenyl-2,4,6-trimethylbenzoyl lithium phosphite in deionized water, stir mechanically to form a transparent solution, and then add the above-mentioned ground disperse dye paste and polyethylene glycol dihydrate respectively. Acrylates, surfynol465, ethylene glycol and diethylene glycol. After filtering with a 0.2μm membrane, the dispersed black direct-injection ink is obtained.

1. Printing: On untreated fabrics, use the above-mentioned dispersed black direct-jet ink for direct inkjet printing on a water-based UV digital textile printing machine. The working environment temperature of the equipment is 15°C and the humidity is 20%;

2. Drying: Dry the printed polyester fabric;

3. Steaming: Steam the dried printed polyester fabric to fix the color. The steaming temperature is 180°C and the steaming time is 3 minutes to obtain black printed fabric.

Comparative example 6

According to the formula of Example 14, the ultraviolet curing monomer and photoinitiator in the dispersed black direct-injection ink were replaced with water to prepare the ink of Comparative Example 6. Its application is the same as that of Example 14.

Example 15

The disperse red direct-injection ink of this embodiment is made of the following mass percentage raw materials: 20% disperse dye C.I disperse red 60 color paste; 12% polyethylene glycol diacrylate; phenyl-2,4,6- Trimethylbenzoylphosphite 0.5%; ethylene glycol 10%; diethylene glycol 5%; Surfynol 4650.5%; the rest is deionized water.

The preparation and application of the dispersed red direct-injection ink in this embodiment are the same as those in Embodiment 12.

The dispersed direct-injection ink obtained in Examples 11-15 and Comparative Examples 3-6 was placed at room temperature for one month, and no precipitation was observed, indicating that the dispersed direct-injection ink provided by the present invention has good storage stability.

The inks of Examples 11-15 and Comparative Examples 3-6 were tested for particle size, and the pattern clarity and K/S value of the direct-injection digital printed fabric were tested. The results are shown in Table 3.

Table 3 Test results of the inks of Examples 11-15 and Comparative Examples 3-6 and their printed fabrics

It can be seen from Table 3 that the particle size of the dispersed direct-jet ink of Examples 11-15 meets the jetting requirements of the digital printing machine. When using the dispersed direct-jet ink of the present invention to digitally print polyester fabrics, the bleeding rate is reduced by up to about 77% compared to traditional inkjet printing. At the same time, compared with Comparative Example 4, the K/S value of Example 15, which is also a dispersed red ink, increased by 3.43. Therefore, the dispersed direct-injection ink of the present invention can obtain better printing quality without pretreatment of fabrics, and the printed fabrics have bright colors and high saturation.

4. Direct injection paint ink

Example 16

The direct-injection textile coating ink of this embodiment is made of the following mass percentage raw materials: 20% pigment blue 27 color paste; dispersant BYK1903%; 8% water-based polyurethane; 8% polyethylene glycol diacrylate; phenyl - Lithium 2,4,6-trimethylbenzoylphosphite 0.5%; ethylene glycol 10%; diethylene glycol 5%; triethanolamine 0.5%; surfynol 46 0.5%, and the rest is deionized water.

The preparation method of the above-mentioned pretreatment-free direct-injection ink includes the following steps:

Under the conditions of 20-40℃ and stirring speed of 200-400rpm, add the photoinitiator to the deionized water while stirring, form a transparent solution through mechanical stirring, and then add the pigment paste, polymer binder, and UV curing unit respectively. body, moisturizer, pH regulator and defoaming agent to obtain a mixed solution. The mixed solution is filtered through 0.8 μm, 0.45 μm and 0.2 μm water-based filters to obtain the direct injection textile coating ink. The polymer connecting material is water-based polyurethane, the UV curing monomer is polyethylene glycol diacrylate, the photoinitiator is phenyl-2,4,6-trimethylbenzoyl lithium phosphite, and the humectant is ethylene glycol. Diol and diethylene glycol, the pH adjuster is triethanolamine.

The specific application of the above-mentioned direct-injection textile coating ink is: on untreated cotton fabrics, the direct-injection textile coating ink is used for direct inkjet printing on a water-based UV digital textile printing machine, and then the printed cotton fabric is Drying is carried out at a drying temperature of 60°C, a steam fixation temperature of 150°C, and a time of 5 minutes to obtain a blue printed cotton fabric.

Example 17

The direct-injection textile coating ink of this embodiment is made of the following mass percentage raw materials: 20% pigment red 254 color paste; dispersant BYK1903%; 8% water-based polyurethane; 8% polyethylene glycol diacrylate; phenyl - Lithium 2,4,6-trimethylbenzoylphosphite 0.5%; ethylene glycol 10%; diethylene glycol 5%; triethanolamine 0.5%; surfynol 46 0.5%, and the rest is deionized water.

The specific application of the above-mentioned direct-injection textile coating ink is: on untreated cotton fabrics, the direct-injection textile coating ink is used for direct inkjet printing on a water-based UV digital textile printing machine, and then the printed cotton fabric is Drying is performed at a drying temperature of 60°C, a steam fixing temperature of 150°C, and a time of 5 minutes to obtain a red printed cotton fabric.

Example 18

The direct-injection textile coating ink of this embodiment is made of the following mass percentage raw materials: 20% pigment yellow 81 color paste; dispersant BYK1903%; 8% water-based polyurethane; 8% polyethylene glycol diacrylate; phenyl - Lithium 2,4,6-trimethylbenzoylphosphite 0.5%; ethylene glycol 10%; diethylene glycol 5%; triethanolamine 0.5%; surfynol 46 0.5%, and the rest is deionized water.

The specific application of the above-mentioned direct-injection textile coating ink is: on untreated cotton fabrics, the direct-injection textile coating ink is used for direct inkjet printing on a water-based UV digital textile printing machine, and then the printed cotton fabric is Drying is carried out at a drying temperature of 60°C, a steam fixing temperature of 150°C, and a time of 5 minutes to obtain a yellow printed cotton fabric.

Comparative example 7

According to the formula of Example 18, the ink of Comparative Example 7 was prepared: the ultraviolet curing monomer and photoinitiator in the direct-injection textile coating ink were replaced with deionized water. Its specific application is the same as that in Example 18, and yellow printed cotton fabric is obtained.

Example 19

The direct-injection textile coating ink of this embodiment is made from the following raw materials with mass percentages: 20% pigment black 32 color paste; dispersant BYK1903%; 8% water-based polyurethane; 8% polyethylene glycol diacrylate; phenyl- Lithium 2,4,6-trimethylbenzoylphosphite 0.5%; ethylene glycol 10%; diethylene glycol 5%; triethanolamine 0.5%; surfynol 46 0.5%, and the rest is deionized water.

The specific application of the above-mentioned direct-injection textile coating ink is: on untreated cotton fabrics, the direct-injection textile coating ink is used for direct inkjet printing on a water-based UV digital textile printing machine, and then the printed cotton fabric is Drying is carried out at a drying temperature of 60°C, a steam fixing temperature of 150°C, and a time of 5 minutes to obtain a black printed cotton fabric.

Example 20

The direct-injection textile coating ink of this embodiment is made of the following mass percentage raw materials: 20% pigment yellow 81 color paste; dispersant BYK1903%; 8% water-based polyurethane; 12% polyethylene glycol diacrylate; phenyl - Lithium 2,4,6-trimethylbenzoylphosphite 0.5%; ethylene glycol 10%; diethylene glycol 5%; triethanolamine 0.5%; surfynol 46 0.5%, and the rest is deionized water.

The preparation and application of the direct injection coating ink in this embodiment are the same as those in Embodiment 18.

The performance of the inks of Examples 16-20 and Comparative Example 7 and their printed fabrics were evaluated. The test results are shown in Table 4.

Table 4 Test results of the inks of Examples 16-20 and Comparative Example 7 and their printed fabrics

It can be seen from Table 4 that the direct-injection textile coating inks of Examples 16-20 have good sprayability and storage stability, and meet the basic requirements for ink performance. Compared with Comparative Example 7, the direct-injection textile paint ink of Example 20 provided by the present invention prints clearly, and the bleeding rate can be reduced by up to 76%. Therefore, the direct-injection ink of the present invention can reduce the bleeding of the ink on the printed fabric without pretreatment of the fabric, improve the printing clarity, and also simplify the inkjet printing process, reduce the printing cost, and is in line with the printing and dyeing industry. requirements for energy conservation and emission reduction.

The above-described embodiments are only preferred embodiments to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be determined by the claims.

Claims

A direct-injection printing ink includes dye/pigment, auxiliary agent and water, and is characterized in that the direct-injection printing ink also includes ultraviolet curing monomer and photoinitiator.
A direct-injection printing ink according to claim 1, characterized in that the ultraviolet light curable monomer is a water-soluble ultraviolet light curable monomer;

Preferably, the water-soluble UV curable monomer is one of polyethylene glycol diacrylate, ethoxyethoxyethyl acrylate, polyethylene glycol dimethacrylate and acryloyl morpholine or more;

Preferably, the mass percentage of ultraviolet curable monomer in the direct-injection printing ink is 2-20%.
A direct-injection printing ink according to claim 1, characterized in that the photoinitiator is a water-soluble photoinitiator;

Preferably, the water-soluble photoinitiator is 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone and/or phenyl-2,4,6-trimethylbenzyl Lithium acyl phosphite;

Preferably, the mass percentage of the photoinitiator in the direct-injection printing ink is 0.1-5%.
A direct-injection printing ink according to any one of claims 1 to 3, characterized in that the direct-injection printing ink is a direct-injection reactive dye ink, which includes the following components in mass percentage: Reactive dye 0.5-10%, UV curable monomer 2%-20%, photoinitiator 0.1-1%, moisturizer 5-25%, color fixing agent 1-10%, pH regulator 0.1-5%, disinfectant 0.1-1% of foaming agent, 2-8% of fixing agent, and the balance water.
A direct injection printing ink according to any one of claims 1 to 3, characterized in that the direct injection printing ink is a direct injection acid dye ink, which includes the following components in mass percentage: Acid dye 0.5-10%, UV curable monomer 2%-20%, photoinitiator 0.1-1%, moisturizer 5-25%, color fixing aid 1-5%, pH regulator 0.1-5%, and the balance of water.
A direct-injection printing ink according to any one of claims 1 to 3, characterized in that the direct-injection printing ink is a direct-injection disperse dye ink, which includes the following components in mass percentage: Disperse dye 0.5-15%, dispersant 0.5%-10%, UV curable monomer 2-20%, photoinitiator 0.1-1%, humectant 5-25%, defoaming agent 0.1-1%, and the rest amount of water.
A direct-injection printing ink according to any one of claims 1 to 3, characterized in that the direct-injection printing ink is a direct-injection paint ink, which includes the following components in mass percentage: pigments Color paste 20-40%, dispersant 0.5%-10%, polymer binder 5%-20%, UV curable monomer 2-20%, photoinitiator 0.1-5%, humectant 5-25%, pH adjuster 0.1-10%, defoaming agent 0.1-1%, and the balance water.
A direct-injection printing ink according to any one of claims 4 to 7, characterized in that the moisturizing agent is one of diethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol and glycerol. species or species;

The pH adjuster is one or more of ethanolamine, diethanolamine, and triethanolamine;

The defoaming agent is Surfnol465;

The fixing agent is a water-based cationic resin and/or a self-crosslinking water-soluble acrylic resin;

The fixation aid is one or more of urea, ethylene urea, ethylene urea, polyethyleneimine, and ammonium tartrate;

The polymer connecting material is water-based polyurethane and/or water-based acrylic resin.
The preparation method of direct-injection printing ink according to claim 1, characterized in that it includes: dissolving the photoinitiator in water, then adding dye, ultraviolet curing monomer and auxiliary agent, and after mixing evenly, After filtering through the filter membrane, the direct injection printing ink is obtained.
The application of a direct-injection printing ink in digital textile printing according to any one of claims 1 to 8, characterized in that it includes the following steps:

On untreated fabrics, the direct-injection printing ink is directly ink-jet printed through a UV digital textile printing machine, and the printed fabric is dried and then steamed to fix the color.