CN115260833A

CN115260833A - Direct-injection printing ink and preparation method and application thereof

Info

Publication number: CN115260833A
Application number: CN202210848542.9A
Authority: CN
Inventors: 常广涛; 董颖苹; 李若欣; 陈玉锋; 聂伦; 李燕
Original assignee: Suzhou University
Current assignee: Suzhou University
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-01
Also published as: WO2024016449A1

Abstract

The invention discloses direct injection type printing ink which comprises dye/pigment, an auxiliary agent and water, wherein the direct injection type printing ink also comprises an ultraviolet curing monomer and a photoinitiator, and the dye comprises reactive dye, acid dye, disperse dye and pigment color paste. The direct-injection printing ink disclosed by the invention does not need to carry out pretreatment on the fabric, the fabric is clearly printed, the sewage discharge is effectively reduced, the production efficiency is high, and the direct-injection printing ink has the characteristics of environmental friendliness.

Description

Direct-injection printing ink and preparation method and application thereof

Technical Field

The invention relates to the technical field of digital ink-jet printing, in particular to direct-injection printing ink and a preparation method and application thereof.

Background

With continuous adjustment of industrial structure, acceleration of technological progress pace and upgrading of terminal consumption mode in the printing and dyeing industry in China, the application range of digital ink-jet printing is continuously expanded, the product types are richer, the digital ink-jet printing technology can be applied to industrial mass production from the original small-batch and multi-batch production, and the trend that the digital ink-jet printing technology replaces the traditional printing mode to become the mainstream printing and dyeing technology is increasingly remarkable.

Digital printing, also called digital direct injection printing or digital ink-jet printing, namely, various textiles are printed by utilizing a digital technology, the processing process is simply that images are input into a computer through various digital means, required patterns are formed after editing processing is carried out through a printing software system, then an inkjet printer is controlled by output software, various special printing inks are directly sprayed and printed on various textiles, and then the textiles are placed into a water tank after steam fixation, desizing and bleaching processing is carried out, so that the printing textile printed with high-precision patterns is obtained.

Printing inks for digital printing can also be classified into reactive, acidic, disperse dye type and paint type due to the nature of the fabric itself. The active printing ink is mainly applied to silk and cotton fabric printing, and has the advantages of high color fastness of printed products, complete color spectrum, bright color and the like. Acid dyes are commonly used for dyeing or printing wool, nylon and silk, are used under acidic conditions, generally without hydrolysis problems, and are similar to conventional textile printing by ink jet printing. The disperse dye has the characteristics of complete color spectrum, bright color, high fastness and difficult decomposition, and is most commonly used for polyester dyeing and printing. Paint inks, also known as pigment inks, are another broad class of pigmented materials that are insoluble in water and also in common organic solvents, which are usually present in particulate form on objects to develop color. However, the pigment itself cannot dye the fibers, and a binder is required to achieve the coloring effect. Compared with dye ink jet printing, the pigment ink jet printing has obvious advantages. The dye ink selects different dye inks according to different requirements of fibers, and the coating ink is suitable for various fiber fabrics and is widely used for blended fabrics. The coating ink does not need to be steamed and washed, does not generate sewage, is energy-saving and environment-friendly, and has complete pigment color spectrum and convenient color matching.

When the dyes are directly used for digital ink-jet printing, the problem of ink bleeding exists, and the printing is not clear. Therefore, prior to ink-jet printing, a pretreatment such as sizing is also required for the fabric. However, the pretreatment process is long and complicated, and the pretreatment liquid in the formula contains an organic solvent and is harmful to the environment.

Disclosure of Invention

The invention aims to solve the technical problem of providing direct-injection printing ink and a preparation method thereof, wherein the ink does not need to pretreat fabrics, the fabrics are printed clearly, sewage discharge is effectively reduced, the production efficiency is high, and the ink has the characteristics of environmental protection.

In order to solve the technical problems, the invention provides the following technical scheme:

the invention provides direct injection type printing ink which comprises dye/pigment, an auxiliary agent and water, wherein the direct injection type printing ink also comprises an ultraviolet curing monomer and a photoinitiator.

In order to solve the bleeding problem of ink jet, the traditional method is to firstly pretreat the fabric to improve the ink jet printing quality. But the pretreatment process flow is long and complicated, and the pretreatment liquid in the formula contains an organic solvent and is harmful to the environment. In order to solve the technical problem, a certain amount of photosensitive resin is added into the formula of the printing ink, and the photosensitive resin is subjected to cross-linking polymerization reaction under the illumination, so that the viscosity of the ink is improved in the process of falling to a fabric, the ink is inhibited from permeating on the fabric, and the resolution of a printed pattern is effectively improved. The printing ink is used for ink-jet printing, and the fabric is not required to be pretreated, so that the ink-jet printing process is simplified, and the pollution in the pretreatment process is reduced.

In the invention, the ultraviolet curing monomer is preferably a water-soluble ultraviolet curing monomer which can be suitable for an aqueous ink system, thereby reducing the pollution caused by using an organic solvent. The invention is not limited to the kind of the water-soluble ultraviolet light curing monomer, and includes but is not limited to one or more of polyethylene glycol diacrylate, ethoxy ethyl acrylate, polyethylene glycol dimethacrylate and acryloyl morpholine.

In the present invention, the mass percentage of the ultraviolet curable monomer in the direct injection type printing ink is preferably 2 to 20%, and may be, for example, 2%, 4%, 5%, 6%, 8%, 10%, 12%, 14%, 15%, 16%, 18%, 20%, or the like.

In the present invention, the photoinitiator is a compound capable of initiating the ultraviolet light curing monomer to perform crosslinking curing, and is preferably a water-soluble photoinitiator. The present invention is not limited to the kind of specific water-soluble photoinitiator, including but not limited to one or more of 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone, and lithium phenyl-2, 4, 6-trimethylbenzoyl phosphite.

In the present invention, the photoinitiator in the direct-injection printing ink is preferably 0.1 to 5% by mass, and may be, for example, 0.1%, 0.2%, 0.5%, 0.6%, 0.8%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 4.0%, 5.0%, or the like.

The auxiliary agent preferably includes a bactericide, and the content thereof is preferably 0.1 to 1%, and may be, for example, 0.1%, 0.2%, 0.3%, 0.5%, 0.6%, 0.8%, 1.0%, or the like. Since the ink-jet printing ink of the invention is aqueous ink and water provides a good environment for the growth of microorganisms, the biological mildew of the ink can cause the blockage of the nozzle. Therefore, by adding a certain amount of the bactericide, the growth of bacteria in the ink can be inhibited. The bactericide includes but is not limited to benzoate, sorbitol, 2-methyl-4-isothiazolin-3-one, 2-benzisothiazolin-3-one and other common bactericides.

The dye of the direct injection type printing ink can be reactive dye and acid dye, and can also be disperse dye and coating ink.

For reactive dye ink, the technology of digital printing needs to go through the processes of printing after previous treatment, fixing and washing. The pretreatment is usually called sizing treatment, and in order to avoid the problem of unclear bleeding printing of ink, sodium alginate, alkali and urea are usually mixed in water to prepare a slurry, the slurry is uniformly coated on the surface of a fabric, and the fabric can be arranged on a machine for a subsequent digital printing process after being dried and flatly rolled. The process of printing after pretreatment and then fixing color and washing is complex and time-consuming, particularly water resources and effects are consumed in the sizing process, and the subsequent washing process is also needed, so that the environment is polluted.

Aiming at the reactive dye, the invention provides direct injection type reactive dye ink which comprises the following components in percentage by mass: 0.5-10% of reactive dye, 2-20% of ultraviolet curing monomer, 0.1-1% of photoinitiator, 5-25% of humectant, 1-10% of color fixing agent, 0.1-5% of pH regulator, 0.1-1% of defoaming agent, 2-8% of color fixing auxiliary agent and the balance of water.

In the direct injection type reactive dye ink, the reactive dye is high-purity salt-free liquid reactive dye powder, and common ink-jet printing dyes comprise cyan, red, yellow and black dyes.

In the direct injection type reactive dye ink, the fixing agent is preferably one or more of water-based cationic resin and self-crosslinking water-soluble acrylic resin. The aqueous cationic resin comprises, but is not limited to, cationic quaternary ammonium type fixing agents, cationic primary amine type fixing agents, cationic secondary ammonium type fixing agents, cationic tertiary ammonium type fixing agents and the like. The fixing auxiliary agent is preferably one or more of urea, ethylene urea and ethylene urea.

In the direct injection type reactive dye ink, the humectant is preferably one or more of diethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol and glycerol. The pH regulator is preferably one or more of monoethanolamine, diethanolamine and triethanolamine. The antifoaming agent is preferably surfynol465.

The direct injection type reactive dye ink can be prepared by the following method: dissolving a photoinitiator in the solution, slowly adding the reactive dye, the ultraviolet curing monomer, the humectant, the pH regulator and the defoamer, and uniformly stirring to obtain a mixed solution; and filtering the mixed solution through a water-based filter membrane to obtain the direct injection type reactive dye ink. Preferably, the mixed solution is filtered sequentially through 0.8 μm, 0.45 μm and 0.2 μm aqueous filtration membranes.

In order to avoid the polymerization reaction of the ultraviolet curing monomer in the ink when exposed to light, strict light-shielding conditions are required in the whole ink preparation process.

In addition, the application of the direct injection type reactive dye ink in digital textile printing comprises the following steps: and (3) on untreated fabric, directly carrying out ink jet printing on the direct injection type reactive dye ink by using a UV digital textile printing machine, drying the printed fabric, and then carrying out steaming fixation to obtain the dye-sensitized solar cell.

In the above inkjet application method, examples of the UV light source include: mercury lamps (ultra-high pressure mercury lamps, medium pressure mercury lamps, low pressure mercury lamps, etc.), metal halide lamps, gas lasers, solid state lasers, and the like. From the viewpoint of environmental protection, a preferred light source is an ultraviolet LED (UV-LED).

In the ink-jet application method, the preferable drying temperature is 60 ℃, the preferable steaming color fixing temperature is 100-105 ℃, and the steaming color fixing time is 5-10min.

For acid dye inks, which also suffer from bleed-through problems from ink-jet printing, the fabric must first be pre-treated to improve the quality of the ink-jet print.

Aiming at acid dyes, the invention provides direct-injection acid dye ink which does not need to pretreat fabrics during digital ink-jet printing. Specifically, the direct injection type acid dye ink comprises the following components in percentage by mass: 0.5-10% of acid dye, 2-20% of ultraviolet curing monomer, 0.1-1% of photoinitiator, 5-25% of humectant, 1-5% of fixing auxiliary agent, 0.1-5% of pH regulator and the balance of water.

In the above direct injection type 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. 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, and c.i. acid orange 116.

In the direct injection type acid dye ink, the color fixing auxiliary agent is preferably one or more of polyethyleneimine, ammonium tartrate, urea and ethylene urea.

In the direct injection type acid dye ink, the humectant is preferably one or more of diethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol and glycerol. The pH regulator is preferably one or more of monoethanolamine, diethanolamine and triethanolamine.

The direct-injection acid dye ink can be prepared by the following method: dissolving the photoinitiator in water, slowly adding an acid dye, an ultraviolet curing monomer, a humectant, a color fixing agent and a pH regulator, and uniformly stirring to obtain a mixed solution; and filtering the mixed solution through a nylon membrane to obtain the direct injection type acid dye ink. Preferably, the mixed solution is filtered sequentially through 0.45 μm and 0.2 μm nylon membranes. In order to avoid polymerization of the uv curable monomers in the ink upon exposure to light, strict light-shielding conditions are required during the entire ink preparation process.

In addition, the application of the direct injection type acid dye ink in digital textile printing comprises the following steps: and (3) on untreated fabric, directly carrying out ink-jet printing on the direct-injection type acid dye ink by using a UV digital textile printing machine, drying the printed fabric, and then carrying out steaming fixation to obtain the dye ink. Preferably, the drying temperature is 60 ℃, and the steaming fixation temperature is 110-120 ℃.

As disperse dyes, they are most commonly used for polyester dyeing and printing. However, because the common polyester fabric is hydrophobic, ink drops are easy to diffuse along the warp and weft directions of the fabric, so that the problem of poor definition of ink-jet printing is caused. In order to obtain better printing quality, the fabric is generally subjected to pretreatment such as sizing or thermal transfer printing. The existing disperse dye direct-jet ink-jet printing saves transfer paper, has little pollution to the environment, but generally needs to carry out complex pretreatment process on fabrics in order to improve the printing quality, thus causing the problems of long and complex working procedures, water resource waste and the like, and being not beneficial to environmental protection. At present, most of the technical schemes related to the dispersion direct injection type are that thickening agents are added into ink to omit the pretreatment process of fabrics, but most of the thickening agents used by the prior art are not biodegradable and harmful to human skin and environment.

Aiming at the disperse dye, the invention provides the direct-injection disperse dye ink which does not need to carry out pretreatment and post-treatment on the fabric, has clear fabric printing, simple and convenient process and is friendly to workers and environment. Specifically, the direct injection type disperse dye ink comprises the following components in percentage by mass: 0.5-15% of disperse dye, 0.5-10% of dispersing agent, 2-20% of ultraviolet curing monomer, 0.1-1% of photoinitiator, 5-25% of humectant, 0.1-1% of defoaming agent and the balance of water.

In the direct injection type disperse dye ink, the disperse dye may be blue, red, yellow, or the like. The blue color may be selected from one or a mixture of several of c.i. disperse blue 14, 20, 56, 60, 72, 73, 79, 87, 115, 158, 165, 183, 291, 359, etc. The red color may be selected from one or a mixture of c.i. disperse red 4, 11, 50, 54, 60, 74, 92, 152, 153, 167, 177, 179, 343, etc. Yellow can be selected from one or more of C.I. disperse yellow 42, 54, 114, 119, 134, 163, 211, etc., and one or more of C.I. disperse orange 29, 30, 31, 36, 44, 73, 76, 288, etc.

In the direct injection type disperse dye ink, the dispersant includes an anionic dispersant and a nonionic dispersant having a carbon chain length of 6 to 18, for example, dispersant MF. The humectant is preferably one or more of diethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol and glycerol. The defoaming agent is preferably surfynol465.

The direct injection type dispersion ink can be prepared by the following method: (1) Adding the disperse dye, the dispersing agent and the humectant into water, fully and uniformly mixing, and then grinding the mixed solution to obtain disperse dye color paste; (2) And uniformly stirring and mixing the color paste, the ultraviolet curing monomer, the photoinitiator, the humectant and the defoamer to obtain the dispersed direct-injection ink. In order to avoid polymerization of the uv curable monomers in the ink upon exposure to light, strict light-shielding conditions are required during the entire ink preparation process.

In addition, the invention also provides application of the direct injection type dispersion ink in digital textile printing, which comprises the following steps: on an untreated fabric, the dispersed direct injection type ink is subjected to direct ink-jet printing through a UV digital textile printing machine; drying the printed polyester fabric; and (3) steaming and fixing the dried printed polyester fabric to obtain the color-fixing polyester fabric. Wherein, the preferable steaming fixation temperature is 180-210 ℃, and the steaming time is 2-6 min.

In the case of coating ink, in order to improve printing quality, before the textile is subjected to ink-jet printing, the textile is usually required to be sized, and a uniform layer of paste is coated on the surface of the textile. The sizing treatment on the fabric not only can influence the hand feeling, the hygroscopicity and the air permeability of the fabric, but also can pollute the environment and waste a large amount of water resources due to the use of the sizing agent, and a large amount of human resources can be needed in the pretreatment process.

The invention provides the direct-injection coating ink, which does not need to pretreat fabrics, has clear printing on the fabrics, simple and convenient process flow and is environment-friendly. The direct-injection coating ink comprises the following components in percentage by mass: 20-40% of pigment color paste, 0.5-10% of dispersing agent, 5-20% of polymer binder, 2-20% of ultraviolet curing monomer, 0.1-5% of photoinitiator, 5-25% of humectant, 0.1-10% of pH regulator, 0.1-1% of defoaming agent and the balance of water.

In the direct-injection type coating ink, the pigment in the pigment paste includes, but is not limited to, black pigment, red pigment, blue pigment and yellow pigment.

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

Since the pigment itself cannot dye the fibers, a binder is needed to achieve the coloring effect. Thus, a certain amount of polymeric binder is added to the coating ink, which acts equivalently to the binder. In contrast to the principle that dye ink penetrates into the gaps between the medium molecules and precipitates to form colors, the coating ink is developed by attaching a colorant (pigment) to the surface of the medium (such as copy paper or printing material) in a physical form (using a high molecular polymer as a binder). In the present invention, the polymer binder is preferably an aqueous polyurethane and/or an aqueous acrylic resin.

In the direct injection type coating ink, the humectant is preferably one or more of diethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol, and glycerin; the pH regulator is preferably one or more of ethanolamine, diethanolamine and triethanolamine; the antifoaming agent is preferably Surfnol465.

The direct-injection coating ink can be prepared by the following method: dissolving a photoinitiator in water, slowly adding a pigment color paste, a polymer binder, a humectant, a pH regulator, an ultraviolet curing monomer and a defoaming agent, and uniformly stirring to obtain a mixed solution; and filtering the mixed solution through a water-based filter membrane to obtain the direct-injection textile coating ink. Preferably, the mixed solution is filtered sequentially through 0.8 μm, 0.45 μm and 0.2 μm aqueous filter membranes. In order to avoid the polymerization reaction of the ultraviolet curing monomer in the ink when exposed to light, strict light-shielding conditions are required in the whole ink preparation process.

In addition, the invention provides an application of the direct injection type coating ink in digital textile printing, which comprises the following steps: and (3) on untreated fabric, directly carrying out ink jet printing on the direct injection type coating ink on a UV digital textile printing machine, drying the printed fabric, and then carrying out steaming fixation to obtain the ink jet printed fabric.

In the inkjet application method of the present invention, as the UV light source, there can be mentioned: mercury lamps (ultra-high pressure mercury lamps, medium pressure mercury lamps, low pressure mercury lamps, etc.), metal halide lamps, gas lasers, solid state lasers, and the like. From the viewpoint of environmental protection, a preferred light source is an ultraviolet LED (UV-LED).

In the ink-jet application method, the preferable drying temperature is 60 ℃, the preferable steaming fixation temperature is 140-160 ℃, and the time is 5-10min.

Compared with the prior art, the invention has the beneficial effects that:

1. the direct injection type printing ink disclosed by the invention is a water-soluble system, the ink formula is simple and reasonable, and pollution caused by volatilization of an organic solvent is avoided.

2. The direct-injection printing ink contains water-soluble photosensitive resin, and the photosensitive resin is subjected to cross-linking polymerization under the illumination, so that the viscosity of the ink is improved in the process of falling to the fabric, the ink infiltration on the fabric is inhibited, and the ink-jet printing quality is effectively improved.

3. The direct-injection printing ink disclosed by the invention is free from pretreatment, so that the production cost is saved, the production flow of the ink-jet printing is simplified, the sewage discharge during pretreatment is reduced, and the low-carbon sustainable development requirement of the printing and dyeing industry is met.

Drawings

FIG. 1 is a graph showing a comparison between the pattern effects of the acid blue direct injection type ink (b) provided in example 6 of the present invention and the ink (a) of comparative example 2 for ink-jet printing.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of 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 materials, reagents and the like used therein are commercially available without otherwise specified.

Clarity and permeabilization testing:

1. visual inspection was carried out. Visually observing whether the printed pattern on the printed fabric is clear.

2. In digital printing software, the printing line width is set to 1cm. Adopting a microscope with super depth of field, selecting a low-power magnifying lens, taking a picture after printing at 100 times, adopting line width measurement software to measure the actual printing line width of the fabric, wherein the percolation rate is the percolation degree of ink in yarns, and calculating the percolation rate according to the following formula:

a permeability (%) = (measurement width-set width)/set width × 100%,

the smaller the permeability value is, the closer the measurement width is to the printing width, the better the permeability resistance is, and the clearer the printed pattern is.

Apparent depth (K/S value): and (3) evaluating the color yield of the fabric according to the K/S value by using a color measuring and matching instrument, testing 4 points and taking an average value, wherein the larger the K/S value is, the darker the color is.

1. Direct injection type reactive dye ink

Example 1

The reactive blue pretreatment-free direct injection ink of the embodiment is prepared from the following raw materials in percentage by mass: c.i. reactive blue 14%; 8% of polyethylene glycol diacrylate; 0.2% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 5% of cationic quaternary ammonium type color fixing agent; 0.5 percent of diethanolamine; surfynol 465.5%, urea 5%, and the balance of deionized water.

The preparation method of the active blue pretreatment-free direct injection ink comprises the following steps:

adding phenyl-2, 4, 6-trimethylbenzoyl lithium phosphite into deionized water under the conditions of 20-40 ℃ and the stirring speed of 200-400rpm, forming a transparent solution through mechanical stirring, then respectively adding C.I. reactive blue 14, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, a cationic quaternary ammonium type color fixing agent, diethanolamine, urea and surfynol465 to obtain a mixed solution, and filtering the mixed solution through 0.8 mu m, 0.45 mu m and 0.2 mu m aqueous filter membranes to obtain the pretreatment-free direct injection type reactive dye ink.

The pretreatment-free direct injection type reactive dye ink has the specific application that: on untreated cotton fabric, the pretreatment-free direct injection type reactive dye ink is used for direct ink-jet printing on an aqueous UV digital textile printing machine, and then the printed cotton fabric is dried and fixed for 3min at the drying temperature of 60 ℃ and the steaming and fixing temperature of 102 ℃ to obtain blue printed cotton fabric.

Example 2

The reactive red pretreatment-free direct injection ink of the embodiment is prepared from the following raw materials in percentage by mass: c.i. reactive red 195%; 8% of polyethylene glycol diacrylate; 0.2% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 5% of cationic quaternary ammonium type color fixing agent; 0.5 percent of diethanolamine; surfynol 465.5%, urea 5%, and the balance of deionized water.

The preparation method of the reactive red pretreatment-free direct injection ink comprises the following steps:

adding phenyl-2, 4, 6-trimethylbenzoyl lithium phosphite into deionized water under the conditions of 20-40 ℃ and the stirring speed of 200-400rpm, forming a transparent solution through mechanical stirring, then respectively adding C.I. active red 195, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, a cationic quaternary ammonium type color fixing agent, diethanolamine, urea and surfynol465 to obtain a mixed solution, and filtering the mixed solution through 0.8 mu m, 0.45 mu m and 0.2 mu m aqueous filter membranes to obtain the pretreatment-free direct injection type reactive dye ink.

The pretreatment-free direct injection type reactive dye ink has the specific application that: on an untreated cotton fabric, the pretreatment-free direct injection type reactive dye ink is used for direct ink-jet printing on a water-based UV digital textile printing machine, and then the printed cotton fabric is dried and fixed at the drying temperature of 60 ℃, the steaming and fixing temperature of 102 ℃ for 3min, so that the red printed cotton fabric is obtained.

Example 3

The reactive yellow pretreatment-free direct injection ink of the embodiment is prepared from the following raw materials in percentage by mass: c.i. reactive yellow 186%; 8% of polyethylene glycol diacrylate; 0.2% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 5% of cationic quaternary ammonium type color fixing agent; 0.5 percent of diethanolamine; surfynol 465.5%, urea 5%, and the balance of deionized water.

The preparation method of the active yellow-free pretreatment direct injection ink comprises the following steps:

adding phenyl-2, 4, 6-trimethyl benzoyl lithium phosphite into deionized water under the conditions of 20-40 ℃ and the stirring speed of 200-400rpm while stirring, forming a transparent solution through mechanical stirring, then respectively adding C.I. active yellow 186, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, a cationic quaternary ammonium type color fixing agent, diethanol amine, urea and surfynol465 to obtain a mixed solution, and filtering the mixed solution through 0.8 mu m, 0.45 mu m and 0.2 mu m aqueous filter membranes to obtain the pretreatment-free direct injection type reactive dye ink.

The pretreatment-free direct injection type reactive dye ink has the specific application that: on an untreated cotton fabric, the pretreatment-free direct injection type reactive dye ink is used for direct ink-jet printing on a water-based UV digital textile printing machine, and then the printed cotton fabric is dried and fixed at the drying temperature of 60 ℃, the steaming and fixing temperature of 102 ℃ for 3min, so that a yellow printed cotton fabric is obtained.

Example 4

The active black pretreatment-free direct injection ink of the embodiment is prepared from the following raw materials in percentage by mass: c.i. reactive black 5%; 8% of polyethylene glycol diacrylate; 0.2% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 5% of cationic quaternary ammonium type color fixing agent; 0.5 percent of diethanol amine; surfynol 465.5%, urea 5%, and the balance of deionized water.

The preparation method of the active black pretreatment-free direct injection ink comprises the following steps:

adding phenyl-2, 4, 6-trimethylbenzoyl lithium phosphite into deionized water under the conditions of 20-40 ℃ and the stirring speed of 200-400rpm, forming a transparent solution through mechanical stirring, then respectively adding C.I. active black 5, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, a cationic quaternary ammonium type color fixing agent, diethanolamine, urea and surfynol465 to obtain a mixed solution, and filtering the mixed solution through 0.8 mu m, 0.45 mu m and 0.2 mu m aqueous filter membranes to obtain the pretreatment-free direct injection type reactive dye ink.

The pretreatment-free direct injection type reactive dye ink has the specific application that: on an untreated cotton fabric, the pretreatment-free direct injection type reactive dye ink is used for direct ink-jet printing on a water-based UV digital textile printing machine, and then the printed cotton fabric is dried and fixed at the drying temperature of 60 ℃, the steaming and fixing temperature of 102 ℃ for 3min, so that black printed cotton fabric is obtained.

Example 5

The reactive red pretreatment-free direct injection ink of the embodiment is prepared from the following raw materials in percentage by mass: c.i. reactive red 195%; 8% of polyethylene glycol diacrylate; 1% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 5% of cationic quaternary ammonium type color fixing agent; 0.5 percent of diethanolamine; the balance of deionized water.

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

Comparative example 1

The direct injection type ink with the reactive red pretreatment-free property of the comparative example is prepared from the following raw materials in percentage by mass: c.i. reactive red 195%; 8% of polyethylene glycol diacrylate; 10% of ethylene glycol; 5% of diethylene glycol; 5% of cationic quaternary ammonium type color fixing agent; 0.5 percent of diethanolamine; surfynol 465.5%, urea 5%, and the balance of deionized water.

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

The inks of examples 1 to 5 and comparative example 1 above were subjected to conductivity, surface tension, viscosity, intermittent printing effect and cold resistance tests, and the pattern definition and bleeding rate of the direct-injection digital printed fabric thereof were evaluated, and the test results are shown in table 1.

TABLE 1 evaluation results of inks of examples 1 to 5 and comparative example 1 and printed fabrics thereof

From the results in table 1, it can be seen that the pretreatment-free direct injection reactive dye inks of examples 1 to 5 have good storage stability and jettability, and meet the basic requirements for ink performance. Compared with the comparative example 1, the pretreatment-free direct injection type reactive dye ink provided by the invention has the advantages that the printing is clear, and the bleeding rate can be reduced by 82% to the maximum. Therefore, the pretreatment-free direct injection ink disclosed by the invention can inhibit ink-jet bleeding without pretreating a fabric, improves printing definition, simplifies an ink-jet printing process, reduces printing cost and meets the requirements of energy conservation and emission reduction in the printing and dyeing industry.

2. Direct injection type acid dye ink

Example 6

The acid yellow direct injection ink of the embodiment is prepared from the following raw materials in percentage by mass: c.i. acid blue 7%; 8% of polyethylene glycol diacrylate; 0.1% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 4% of polyethyleneimine; 5% of urea; 0.5 percent of triethanolamine; the balance of deionized water.

The preparation method of the acid blue direct injection type ink comprises the following steps:

firstly dissolving phenyl-2, 4, 6-trimethyl benzoyl lithium phosphite in deionized water, mechanically stirring to form a transparent solution, then respectively adding C.I. acid blue 7, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, polyethyleneimine and urea, triethanolamine and 2-methyl-4-isothiazoline-3-ketone, stirring for 1-4h at the temperature of 20-40 ℃ and the rotating speed of 200r/min to obtain a mixed solution, and filtering the mixed solution through nylon membranes with the particle size of 0.45 mu m and the particle size of 0.2 mu m to obtain the direct injection type acid dye ink.

The direct injection type acid dye ink has the following specific applications: and (2) on the untreated nylon fabric, directly applying the direct injection type acid dye ink to an aqueous UV digital textile printing machine for direct ink-jet printing, drying the printed nylon fabric, and then steaming and fixing the color, wherein the drying temperature is 60 ℃, and the steaming temperature is 105 ℃, so that the acid blue nylon fabric is obtained.

Comparative example 2

The formulation, preparation and use of the ink of comparative example 2 are essentially the same as in example 6, except that: and replacing the photoinitiator in the acid blue direct injection type ink with deionized water, and turning off a UV lamp of the water-based UV digital textile printing machine during application.

Example 7

The acid red direct injection ink of the embodiment is prepared from the following raw materials in percentage by mass: c.i. acid red 18%; 8% of polyethylene glycol diacrylate; 0.1% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 4% of polyethyleneimine; 5% of urea; 0.5 percent of triethanolamine; the balance of deionized water.

The preparation method of the acid red direct injection type ink comprises the following steps:

firstly dissolving phenyl-2, 4, 6-trimethyl benzoyl lithium phosphite in deionized water, forming transparent solution through mechanical stirring, then respectively adding C.I. acid red 18, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, polyethyleneimine and urea, triethanolamine and 2-methyl-4-isothiazoline-3-ketone, stirring for 1-4h at the temperature of 20-40 ℃ and the rotating speed of 200r/min to obtain mixed solution, and filtering the mixed solution through nylon membranes with the particle size of 0.45 mu m and the particle size of 0.2 mu m to obtain the direct injection type acid dye ink.

The specific application of the direct injection type acid dye ink is as follows: and (2) on the untreated nylon fabric, directly applying the direct injection type acid dye ink to an aqueous UV digital textile printing machine for direct ink-jet printing, drying the printed nylon fabric, and then steaming and fixing the color, wherein the drying temperature is 60 ℃, and the steaming temperature is 105 ℃, so that the acid red nylon fabric is obtained.

Example 8

The acid yellow direct injection ink of the embodiment is prepared from the following raw materials in percentage by mass: c.i. acid yellow 117%; 8% of polyethylene glycol diacrylate; 0.1% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 4% of polyethyleneimine; 5% of urea; 0.5 percent of triethanolamine; the balance being deionized water.

The preparation method of the acid yellow direct injection type ink comprises the following steps:

firstly, dissolving lithium phenyl-2, 4, 6-trimethylbenzoyl phosphite in deionized water, forming a transparent solution through mechanical stirring, then respectively adding C.I. acid yellow 117, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, polyethyleneimine and urea, triethanolamine and 2-methyl-4-isothiazoline-3-ketone, stirring for 1-4h at the temperature of 20-40 ℃ and the rotating speed of 200r/min to obtain a mixed solution, and filtering the mixed solution through nylon membranes of 0.45 mu m and 0.2 mu m to obtain the direct injection type acid dye ink.

The direct injection type acid dye ink has the following specific applications: and (2) on the untreated chinlon fabric, directly applying the direct injection type acid dye ink to an aqueous UV digital textile printing machine for direct ink-jet printing, drying the printed chinlon fabric, and then steaming and fixing the color, wherein the drying temperature is 60 ℃, and the steaming temperature is 105 ℃, so that the acid yellow chinlon fabric is obtained.

Example 9

The acid black direct injection ink of the embodiment is prepared from the following raw materials in percentage by mass: c.i. acid black 194%; 8% of polyethylene glycol diacrylate; 0.1% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 4% of polyethyleneimine; 5% of urea; 0.5 percent of triethanolamine; the balance of deionized water.

The preparation method of the acid black direct injection type ink comprises the following steps of:

firstly, dissolving lithium phenyl-2, 4, 6-trimethylbenzoyl phosphite in deionized water, forming transparent solution through mechanical stirring, then respectively adding C.I. acid black 194, polyethylene glycol diacrylate, ethylene glycol and diethylene glycol, polyethyleneimine and urea, triethanolamine and 2-methyl-4-isothiazoline-3-ketone, stirring for 1-4h at the temperature of 20-40 ℃ and the rotating speed of 200r/min to obtain mixed solution, and filtering the mixed solution through nylon membranes of 0.45 mu m and 0.2 mu m to obtain the direct injection type acid dye ink.

The direct injection type acid dye ink has the following specific applications: and (2) on the untreated nylon fabric, directly applying the direct injection type acid dye ink to an aqueous UV digital textile printing machine for direct ink-jet printing, drying the printed nylon fabric, and then steaming and fixing the color, wherein the drying temperature is 60 ℃, and the steaming temperature is 105 ℃, so that the acid black nylon fabric is obtained.

Example 10

The acid blue direct injection ink of the embodiment is prepared from the following raw materials in percentage by mass: c.i. acid blue 7%; 8% of polyethylene glycol diacrylate; 0.2% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 4% of polyethyleneimine; 5% of urea; 0.5 percent of triethanolamine; the balance of deionized water.

The preparation method and application of the acid blue direct injection type ink of this example are the same as those of example 6.

The inks prepared in examples 6 to 10 and comparative example 2 were subjected to conductivity, surface tension, viscosity, intermittent printing effect and cold resistance tests, and pattern definition and K/S value of the direct-injection digital printing fabric were measured, and the results are shown in table 2.

TABLE 2 test results of inks prepared in examples 6 to 10 and comparative example 2 and their printed fabrics

As can be seen from Table 2, the acid dye inks of examples 6-10 have good storage stability and jettability, and meet the basic requirements of the ink. Compared with the comparative example 2, the direct-injection acid dye ink provided by the invention has the advantages that the printing is clear, and the K/S value is improved. Therefore, the dispersed direct-injection ink can obtain better printing quality without pretreating the fabric, and the printed fabric has bright color and high saturation.

3. Direct-injection type disperse dye ink

In the following examples and comparative examples, 135g/m of polyester fabric was used as the printed fabric.

Example 11

The direct injection type disperse yellow ink of the embodiment is prepared from the following raw materials in percentage by mass: 20 percent of disperse dye C.I disperse yellow 54 color paste; 8% of polyethylene glycol diacrylate; 0.5% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; surfynol 465.5%; the balance of deionized water.

The preparation method of the dispersed yellow direct injection ink comprises the following steps:

(1) Color paste preparation

According to the mass percent, adding 20 percent of C.I disperse yellow 54, 15 percent of dispersing agent MF,25 percent of glycol and diethylene glycol, and 1 percent of surfynol465 into 15 percent of water for fully and evenly mixing at room temperature, then grinding the mixed solution for 8-10h in a sand mill by using zirconium beads with the diameter of 0.35-0.5mm, wherein the grinding speed is 2500rpm, the volume ratio of the sand beads to the mixture is 1.5, and filtering the zirconium beads to obtain the disperse dye color paste.

(2) Ink preparation

Firstly, dissolving the phenyl-2, 4, 6-trimethyl benzoyl lithium phosphite in deionized water, mechanically stirring to form a transparent solution, and then respectively adding the ground disperse dye color paste, the polyethylene glycol diacrylate, the Surfynol465, the ethylene glycol and the diethylene glycol. Filtering by adopting a 0.2 mu m membrane to obtain the disperse yellow direct injection ink.

The specific application of the disperse yellow direct injection ink is as follows:

1. printing: on untreated fabrics, the disperse yellow direct injection type ink is used for direct ink-jet printing on a water-based UV digital textile printing machine, wherein the working environment temperature of the equipment is 15 ℃, and the humidity is 20%;

2. drying: drying the printed polyester fabric;

3. steaming: and (3) steaming and fixing the dried printed polyester fabric, wherein the steaming temperature is 180 ℃, and the steaming time is 3min, so that the yellow printed fabric is obtained.

Comparative example 3

Comparative example 3 ink was prepared according to the formulation of example 11, using the same as example 11, except that the uv curable monomer and photo initiation in the dispersed yellow direct injection ink were replaced with water.

Example 12

The direct injection type red dispersion ink of the embodiment is prepared from the following raw materials in percentage by mass: 20% of disperse dye C.I disperse red 60 color paste; 8% of polyethylene glycol diacrylate; 0.5% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; surfynol 465.5%; the balance of deionized water.

The preparation method of the disperse red direct injection type ink comprises the following steps:

(1) Color paste preparation

According to the mass percentage, adding 20 percent of C.I disperse red 60, 15 percent of dispersing agent MF,25 percent of ethylene glycol and diethylene glycol, and 1 percent of surfynol465 into 15 percent of water at room temperature, fully and uniformly mixing, then grinding the mixed solution in a sand mill for 8-10h by using zirconium beads with the diameter of 0.35-0.5mm, wherein the grinding speed is 2500rpm, and the volume ratio of the sand beads to the mixture is 1.5, and filtering the zirconium beads to obtain the disperse dye color paste.

(2) Ink preparation

Firstly, dissolving the phenyl-2, 4, 6-trimethyl benzoyl lithium phosphite in deionized water, mechanically stirring to form a transparent solution, and then respectively adding the ground disperse dye color paste, the polyethylene glycol diacrylate, the Surfynol465, the ethylene glycol and the diethylene glycol. Filtering with 0.2 μm membrane to obtain the disperse red direct injection ink.

The specific application of the disperse red direct injection type ink is as follows:

1. printing: on untreated fabrics, the disperse red direct injection type ink is used for direct ink-jet printing on a water-based UV digital textile printing machine, wherein the working environment temperature of the equipment is 15 ℃, and the humidity is 20%;

2. drying: drying the printed polyester fabric;

3. steaming: and (3) steaming and fixing the dried printed polyester fabric, wherein the steaming temperature is 180 ℃, and the steaming time is 3min, so that the red printed fabric is obtained.

Comparative example 4

Comparative example 4 ink was prepared according to the formulation of example 12, using the same uv curable monomer and photo initiation and replacement with water as in example 12.

Example 13

The direct injection type disperse blue ink of the embodiment is prepared from the following raw materials in percentage by mass: 20% of disperse dye C.I disperse blue 60 color paste; 8% of polyethylene glycol diacrylate; 0.5% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; surfynol 465.5%; the balance of deionized water.

The preparation method of the disperse blue direct injection type ink comprises the following steps

(1) Color paste preparation

According to the mass percentage, adding 20 percent of C.I disperse blue 60, 15 percent of dispersing agent MF,25 percent of ethylene glycol and diethylene glycol, and 1 percent of surfynol465 into 15 percent of water at room temperature, fully and uniformly mixing, then grinding the mixed solution in a sand mill for 8-10h by using zirconium beads with the diameter of 0.35-0.5mm, wherein the grinding speed is 2500rpm, and the volume ratio of the sand beads to the mixture is 1.5, and filtering the zirconium beads to obtain the disperse dye color paste.

(2) Ink preparation

The specific application of the dispersed direct injection ink is as follows:

1. printing: on untreated fabric, the disperse blue direct injection type ink is used for direct ink-jet printing on a water-based UV digital textile printing machine, wherein the working environment temperature of the equipment is 15 ℃, and the humidity is 20%;

2. drying: drying the printed polyester fabric;

3. steaming: and (3) steaming and fixing the dried printed polyester fabric, wherein the steaming temperature is 180 ℃, and the steaming time is 3min, so that the blue printed fabric is obtained.

Comparative example 5

Comparative example 5 ink was prepared according to the formulation of example 13, using the same as example 13, except that the uv curable monomer and photo initiation and replacement in the dispersed blue direct injection type ink were replaced with water.

Example 14

The direct black dispersion ink of the embodiment is prepared from the following raw materials in percentage by mass: 20 percent of black paste is compounded and dispersed; 8% of polyethylene glycol diacrylate; phenyl-2, 4, 6-trimethylbenzoyl phosphorous acid 0.5%; 10% of ethylene glycol; 5% of diethylene glycol; surfynol 465.5%; the balance being deionized water.

The preparation method of the dispersed black direct injection type ink comprises the following steps of:

(1) Color paste preparation

According to the mass percentage, at room temperature, adding 20% of disperse dye, 15% of dispersing agent, 25% of humectant and 1% of defoaming agent into 15% of water, fully and uniformly mixing, then grinding the mixed solution in a sand mill for 8-10h by using zirconium beads with the diameter of 0.35-0.5mm, wherein the grinding rotation speed is 2500rpm, the volume ratio of the sand beads to the mixture is 1.5, and filtering the zirconium beads to obtain the disperse dye color paste. The disperse black dye is prepared by compounding C.I disperse blue 79, C.I disperse red 167 and C.I disperse orange 288, the dispersing agent is a dispersing agent MF, the humectants are ethylene glycol and diethylene glycol, and the defoaming agent is surfynol465.

(2) Ink preparation

Firstly, dissolving lithium phenyl-2, 4, 6-trimethylbenzoyl phosphate in deionized water, mechanically stirring to form a transparent solution, and then respectively adding the ground disperse dye color paste, polyethylene glycol diacrylate, surfynol465, ethylene glycol and diethylene glycol. Filtering with 0.2 μm membrane to obtain the disperse black direct injection ink.

The specific application of the dispersed direct injection ink is as follows:

1. printing: on untreated fabrics, the dispersed black direct injection type ink is used for direct ink-jet printing on a water-based UV digital textile printing machine, wherein the working environment temperature of the equipment is 15 ℃, and the humidity is 20%;

2. and (3) drying: drying the printed polyester fabric;

3. steaming: and (3) steaming and fixing the dried printed polyester fabric at 180 ℃ for 3min to obtain the black printed fabric.

Comparative example 6

Comparative example 6 ink was prepared according to the formulation of example 14, using the same as example 14, except that the uv curable monomer and photo initiation and replacement in the dispersion black direct injection type ink were changed to water.

Example 15

The direct injection type red dispersion ink of the embodiment is prepared from the following raw materials in percentage by mass: 20 percent of disperse dye C.I disperse red 60 color paste; 12% of polyethylene glycol diacrylate; phenyl-2, 4, 6-trimethylbenzoyl phosphorous acid 0.5%; 10% of ethylene glycol; 5% of diethylene glycol; surfynol 465.5%; the balance being deionized water.

The preparation and application of the dispersed red direct injection type ink of this example are the same as those of example 12.

The dispersed direct-injection inks obtained in examples 11 to 15 and comparative examples 3 to 6 were left at room temperature for 1 month, and no precipitation was observed, indicating that the dispersed direct-injection inks provided by the present invention have good storage stability.

The inks of examples 11 to 15 and comparative examples 3 to 6 were subjected to a particle size test, and pattern definition and K/S value of the direct-injection digital printing fabrics were measured, and the results are shown in Table 3.

TABLE 3 test results of inks of examples 11 to 15 and comparative examples 3 to 6 and printed fabrics thereof

As can be seen from Table 3, the particle sizes of the dispersed direct injection inks of examples 11-15 meet the jet requirements of the digital printing machine. When the disperse direct-injection ink is adopted to carry out digital printing on the polyester fabric, compared with the traditional ink-jet printing, the penetration rate is reduced by about 77 percent at most. Meanwhile, the K/S value was improved by 3.43 as compared with comparative example 4 in example 15 which is a dispersed red ink. Therefore, the dispersed direct-injection ink can obtain better printing quality without pretreating the fabric, and the printed fabric has bright color and high saturation.

4. Direct-injection type coating ink

Example 16

The direct-injection textile coating ink of the embodiment is prepared from the following raw materials in percentage by mass: 20% of pigment blue 27 color paste; dispersant BYK 190%; 8% of waterborne polyurethane; 8% of polyethylene glycol diacrylate; 0.5% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 0.5 percent of triethanolamine; surfynol 465.5%, and the balance deionized water.

The preparation method of the pretreatment-free direct injection ink comprises the following steps:

adding a photoinitiator into deionized water while stirring at the temperature of 20-40 ℃ and the stirring speed of 200-400rpm, forming a transparent solution by mechanical stirring, then respectively adding pigment color paste, a polymer binder, an ultraviolet curing monomer, a humectant, a pH regulator and a defoaming agent to obtain a mixed solution, and filtering the mixed solution through water-based filter membranes of 0.8 mu m, 0.45 mu m and 0.2 mu m to obtain the direct injection type textile coating ink. Wherein the polymer binder is waterborne polyurethane, the ultraviolet curing monomer is polyethylene glycol diacrylate, the photoinitiator is phenyl-2, 4, 6-trimethyl benzoyl lithium phosphite, the humectant is ethylene glycol and diethylene glycol, and the pH regulator is triethanolamine.

The direct injection type textile coating ink has the following specific applications: and (3) on untreated cotton fabric, directly applying the direct injection type textile coating ink to an aqueous UV digital textile printing machine for direct ink-jet printing, and drying the printed cotton fabric at the drying temperature of 60 ℃, the steaming fixation temperature of 150 ℃ and the steaming fixation time of 5min to obtain the blue printed cotton fabric.

Example 17

The direct-injection textile coating ink of the embodiment is prepared from the following raw materials in percentage by mass: pigment red 254 color paste 20%; dispersant BYK 190%; 8% of waterborne polyurethane; 8% of polyethylene glycol diacrylate; 0.5% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 0.5 percent of triethanolamine; surfynol 465.5%, and the balance deionized water.

adding a photoinitiator into deionized water under the conditions of 20-40 ℃ and stirring speed of 200-400rpm, mechanically stirring to form a transparent solution, then respectively adding pigment color paste, a polymer binder, an ultraviolet curing monomer, a humectant, a pH regulator and a defoaming agent to obtain a mixed solution, and filtering the mixed solution through 0.8 mu m, 0.45 mu m and 0.2 mu m water-based filter membranes to obtain the direct injection type textile coating ink. Wherein the polymer binder is waterborne polyurethane, the ultraviolet curing monomer is polyethylene glycol diacrylate, the photoinitiator is phenyl-2, 4, 6-trimethyl benzoyl lithium phosphite, the humectant is ethylene glycol and diethylene glycol, and the pH regulator is triethanolamine.

The direct injection type textile coating ink has the following specific applications: and (3) on untreated cotton fabric, directly applying the direct injection type textile coating ink to an aqueous UV digital textile printing machine for direct ink-jet printing, and drying the printed cotton fabric at the drying temperature of 60 ℃, the steaming fixation temperature of 150 ℃ and the steaming fixation time of 5min to obtain the red printed cotton fabric.

Example 18

The direct-injection type textile coating ink of the embodiment is prepared from the following raw materials in percentage by mass: pigment yellow 81 and color paste 20 percent; dispersant BYK 190%; 8% of waterborne polyurethane; 8% of polyethylene glycol diacrylate; 0.5% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 0.5 percent of triethanolamine; surfynol 465.5%, and the balance deionized water.

The specific application of the direct-injection textile coating ink is as follows: and (3) on untreated cotton fabric, directly applying the direct injection type textile coating ink to an aqueous UV digital textile printing machine for direct ink-jet printing, and drying the printed cotton fabric at the drying temperature of 60 ℃, the steaming fixation temperature of 150 ℃ and the steaming fixation time of 5min to obtain the yellow printed cotton fabric.

Comparative example 7

Comparative example 7 ink was prepared according to the formulation of example 18: and replacing the ultraviolet curing monomer and the photoinitiator in the direct-injection type textile coating ink with deionized water. The specific application is the same as the application method of example 18, and yellow printed cotton fabric is obtained.

Example 19

The direct-injection type textile coating ink of the embodiment is prepared from the following raw materials in percentage by mass: 20% of pigment black 32 and color paste; dispersant BYK 190%; 8% of waterborne polyurethane; 8% of polyethylene glycol diacrylate; 0.5% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 0.5 percent of triethanolamine; surfynol 465.5%, and the balance deionized water.

The specific application of the direct-injection textile coating ink is as follows: and (3) on untreated cotton fabric, applying the direct injection type textile coating ink to an aqueous UV digital textile printing machine for direct ink-jet printing, and drying the printed cotton fabric at the drying temperature of 60 ℃, the steaming fixation temperature of 150 ℃ and the steaming fixation time of 5min to obtain the black printed cotton fabric.

Example 20

The direct-injection textile coating ink of the embodiment is prepared from the following raw materials in percentage by mass: pigment yellow 81 and color paste 20 percent; dispersant BYK 190%; 8% of waterborne polyurethane; 12% of polyethylene glycol diacrylate; 0.5% of lithium phenyl-2, 4, 6-trimethylbenzoylphosphite; 10% of ethylene glycol; 5% of diethylene glycol; 0.5 percent of triethanolamine; surfynol 465.5%, and the balance deionized water.

The preparation and application of the direct injection type dope ink of this example are the same as those of example 18.

The inks of examples 16 to 20 and comparative example 7 and their printed fabrics were subjected to performance evaluation, and the test results are shown in Table 4.

TABLE 4 test results of inks of examples 16 to 20 and comparative example 7 and their printed fabrics

As can be seen from Table 4, the inks of the direct-injection textile coatings of the present examples 16-20 have good jettability and storage stability, and meet the basic requirements of ink performance. Compared with the comparative example 7, the direct-injection type textile coating ink provided by the invention has the advantages that the printing is clear, and the bleeding rate can be reduced by 76% at most. Therefore, the direct injection type ink disclosed by the invention can reduce the bleeding of the ink in the printed fabric without pretreating the fabric, improves the printing definition, simplifies the ink-jet printing process, reduces the printing cost and meets the requirements of energy conservation and emission reduction in the printing and dyeing industry.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims

1. The direct-injection printing ink comprises dye/pigment, an auxiliary agent and water, and is characterized by further comprising an ultraviolet curing monomer and a photoinitiator.

2. The direct-injection printing ink according to claim 1, wherein the uv-curable monomer is a water-soluble uv-curable monomer;

preferably, the water-soluble ultraviolet-curing monomer is one or more of polyethylene glycol diacrylate, ethoxyethoxyethyl acrylate, polyethylene glycol dimethacrylate and acryloyl morpholine;

preferably, the mass percentage of the ultraviolet curing monomer in the direct injection printing ink is 2-20%.

3. The direct-injection printing ink according to claim 1, wherein the photoinitiator is a water-soluble photoinitiator;

preferably, the water-soluble photoinitiator is 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone and/or lithium phenyl-2, 4, 6-trimethylbenzoylphosphite;

preferably, the mass percent of the photoinitiator in the direct injection printing ink is 0.1-5%.

4. The direct injection printing ink according to any one of claims 1 to 3, wherein the direct injection printing ink is a direct injection reactive dye ink comprising the following components in mass percent: 0.5-10% of reactive dye, 2-20% of ultraviolet curing monomer, 0.1-1% of photoinitiator, 5-25% of humectant, 1-10% of color fixing agent, 0.1-5% of pH regulator, 0.1-1% of defoaming agent, 2-8% of color fixing auxiliary agent and the balance of water.

5. The direct injection printing ink according to any one of claims 1 to 3, wherein the direct injection printing ink is a direct injection acid dye ink comprising the following components in percentage by mass: 0.5-10% of acid dye, 2-20% of ultraviolet curing monomer, 0.1-1% of photoinitiator, 5-25% of humectant, 1-5% of fixing auxiliary agent, 0.1-5% of pH regulator and the balance of water.

6. The direct injection printing ink according to any one of claims 1 to 3, wherein the direct injection printing ink is a direct injection disperse dye ink comprising the following components in mass percent: 0.5-15% of disperse dye, 0.5-10% of dispersing agent, 2-20% of ultraviolet curing monomer, 0.1-1% of photoinitiator, 5-25% of humectant, 0.1-1% of defoaming agent and the balance of water.

7. The direct injection printing ink according to any one of claims 1 to 3, wherein the direct injection printing ink is a direct injection coating ink comprising the following components in mass percent: 20-40% of pigment color paste, 0.5-10% of dispersing agent, 5-20% of polymer binder, 2-20% of ultraviolet curing monomer, 0.1-5% of photoinitiator, 5-25% of humectant, 0.1-10% of pH regulator, 0.1-1% of defoaming agent and the balance of water.

8. The direct injection printing ink according to any one of claims 4 to 7, wherein the humectant is one or more selected from diethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol and glycerol;

the pH regulator is one or more of ethanolamine, diethanolamine and triethanolamine;

the antifoaming agent is Surfnol465;

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

the color fixing auxiliary agent is one or more of urea, ethylene urea, polyethyleneimine and ammonium tartrate;

the polymer binder is waterborne polyurethane and/or waterborne acrylic resin.

9. The method of claim 1, comprising: dissolving a photoinitiator in water, adding a dye, an ultraviolet curing monomer and an auxiliary agent, uniformly mixing, and filtering through a filter membrane to obtain the direct injection printing ink.

10. Use of a direct injection printing ink according to any one of claims 1 to 8 in digital textile printing, comprising the steps of:

and (3) on an untreated fabric, directly carrying out ink-jet printing on the direct-injection printing ink by using a UV digital textile printing machine, drying the printed fabric, and then carrying out steaming fixation to obtain the ink-jet printing ink.