CN115519919A - Ink jet material, preparation method and printing device - Google Patents

Abstract

The invention discloses an inkjet material, a preparation method and a printing device. The inkjet material comprises: a medium layer; a first coating, the first coating is arranged on one side of the medium layer, and the first coating includes a first inorganic Pigment and first binder; second coating, the second coating is arranged on the side of the first coating away from the medium layer, and includes pearlescent material, the second inorganic pigment and the second binder in the second coating a third coating, the third coating is disposed on the side of the second coating away from the first coating, the third coating includes a third inorganic pigment and a third binder. The inkjet material of the present invention not only realizes the ink-fixing effect of inkjet but also realizes the pearlescent effect of inkjet printing by setting multi-layer coating, and the image will not affect the pearlescent effect, and the pearlescent effect will not interfere with the image expression of details.

Description

Inkjet material, preparation method and printing device

technical field

The invention belongs to the field of printing consumables, and in particular relates to an inkjet material, a preparation method and a printing device.

Background technique

If you want to achieve the pearlescent effect by inkjet printing, you generally need to achieve this effect by coating the inkjet consumables. Since the coating is set above the image, it may cause problems such as low density of the image, low reflective gloss of the image, and poor expression of image details, which will affect the color density of the image and the transparency of the entire image, resulting in The reason for this phenomenon is mainly that the glossy pigment contained in the coating blocks and reflects the incident light.

As mentioned in JP5385199B2, the reason for the gloss effect is that the incident light is reflected from the glossy surface after penetrating the first ink receiving layer, so the first ink receiving layer is too thick, which will inevitably cause too much loss of incident light and cause the gloss effect of the product to be not obvious; If the first ink receiving layer does not affect the light transmission, there will be a partial decline in the ink absorption of the picture, and the insufficient ink absorption will inevitably spread to the surroundings in places with high density, resulting in a decline in picture quality. The glossy pigments are directly mixed Added to the second ink receiving layer, the glossy pigments are in a random arrangement state at this time, if there is overlap of flaky glossy pigments, the first ink receiving layer must be thinner so as not to affect the light transmission, then the ink absorption performance needs to rely on the second ink receiving layer The second ink-receiving layer is completed by relay, at this time, the ink-absorbing performance will be affected due to the overlap of glossy pigments.

In addition, printing glossy paper with electrostatic imaging output mode can also be used. The printing layer is prepared by mixing glossy pigments and resins, and the image is covered on the printing layer. The imaging method of inkjet is that the ink penetrates into the coating, so the imaging medium needs to have a certain degree of water absorption, and the printed electronic ink is first attached to the coating surface, and there is no requirement for the absorption of the medium, so there is no way for inkjet to adopt this method. The way.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, the object of the present invention is to provide an inkjet material, a preparation method and a printing device. The inkjet material of the present invention not only realizes the ink-fixing effect of inkjet but also realizes the pearlescent effect of inkjet printing by setting a multi-layer coating, and the image will not affect the pearlescent effect, and the pearlescent effect will not interfere with the image expression of details.

In one aspect of the present invention, the present invention provides an inkjet material. According to an embodiment of the invention, the inkjet material comprises:

medium layer;

a first coating, the first coating is disposed on one side of the medium layer, and the first coating includes a first inorganic pigment and a first binder;

a second coating, the second coating is arranged on the side of the first coating away from the medium layer, and the second coating includes pearlescent material, a second inorganic pigment and a second binder ;

a third coating, the third coating is disposed on a side of the second coating away from the first coating, and the third coating includes a third inorganic pigment and a third binder.

According to the inkjet material of the embodiment of the present invention, the third coating ensures that visible light can reach the second coating, and the third inorganic pigment in the third coating fixes most of the dyes or pigments in the inkjet ink to the third coating; The pearlescent material of the second coating realizes the pearlescent effect of the product, and the second inorganic pigment of the second coating ensures the ink absorption performance of the second coating; the first coating quickly absorbs most of the water in the inkjet ink, The first inorganic pigment of the first coating further ensures the ink-fixing effect on the inkjet ink. The ink-jet material of the present invention not only realizes the ink-fixing effect of inkjet, but also realizes the pearlescent effect of inkjet printing by setting multi-layer coatings. The image will not affect the pearlescent effect, and the pearlescent effect will not affect the absorption effect. ink effect.

In addition, the method according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

In some embodiments of the present invention, the hiding rate of the pearlescent material on the second coating is 20%-50%.

In some embodiments of the present invention, at least part of the second inorganic pigment is coated on the surface of the pearlescent material.

In some embodiments of the present invention, the second inorganic pigment is alumina.

In some embodiments of the present invention, the particle size of the second inorganic pigment is 0.01-0.5 micron, preferably 0.05-0.3 micron.

In some embodiments of the present invention, the particle size of the pearlescent material is 1-10 microns, preferably 1-5 microns.

In some embodiments of the present invention, the mass ratio of the pearlescent material, the second inorganic pigment and the second binder is (1-5):(12-18):(1-5).

In some embodiments of the present invention, the thickness of the second coating is 1-5 microns.

In some embodiments of the present invention, the particle size of the first inorganic pigment is 0.01-0.5 microns.

In some embodiments of the present invention, the particle size of the third inorganic pigment is 0.01-0.3 microns.

In some embodiments of the present invention, the thickness of the first coating is 28-35 microns.

In some embodiments of the present invention, the thickness of the third coating is 2-5 microns.

In some embodiments of the present invention, the mass ratio of the first inorganic pigment to the first binder is (5-25):1.

In some embodiments of the present invention, the mass ratio of the third inorganic pigment to the third binder is (5-25):1.

In some embodiments of the present invention, the material of the first inorganic pigment is selected from at least one of calcium carbonate and aluminum oxide.

In some embodiments of the present invention, the material of the second inorganic pigment is alumina.

In some embodiments of the present invention, the material of the third inorganic pigment is alumina.

In some embodiments of the present invention, the first binder, the second binder and the third binder are each independently a polyvinyl alcohol solution.

In yet another aspect of the present invention, the present invention proposes a method of preparing an inkjet material. According to an embodiment of the present invention, the method includes:

(1) coating the first coating liquid on one side of the medium layer, so as to form the first coating on the medium layer;

(2) coating the second coating liquid on the side of the first coating away from the dielectric layer, so as to form a second coating on the side of the first coating away from the dielectric layer ;

(3) coating the third coating liquid on the side of the second coating away from the first coating, so as to form a coating on the side of the second coating away from the first coating Third coat.

According to the method for preparing an inkjet material according to an embodiment of the present invention, the present invention uses the first coating liquid to coat the first coating, the second coating liquid to coat the second coating, and the third coating liquid to coat the third coating. The coating further ensures that the first inorganic pigment and the first binder are more evenly distributed on the first coating, and the pearlescent material, the second inorganic pigment and the second binder are more evenly distributed on the second coating , the third inorganic pigment and the third binder are more evenly distributed on the third coating, which further enhances the ink-fixing effect of the third coating; further enhances the pearlescent effect of the second coating; further enhances the first The coating quickly absorbs most of the water in the inkjet ink. As a result, the ink-fixing effect of the inkjet material on the inkjet and the pearlescent effect of inkjet printing are improved, the density of the printed image is improved, the pearlescent effect of the printed image is enhanced, and the detailed expression of the image is enhanced.

In addition, the method according to the foregoing embodiments of the present invention may also have the following technical solutions:

In some embodiments of the present invention, the preparation method of the first coating liquid includes:

mixing a first inorganic pigment, water, a first binder, and a first curing agent to form the first coating liquid;

Optionally, the preparation method of the third coating liquid comprises:

A third inorganic pigment, water, a third binder, a third acidic substance, and a third curing agent are mixed to form the third coating liquid.

In some embodiments of the present invention, the preparation method of the second coating liquid includes:

mixing a coupling agent, an organic solvent, a pearlescent material, water, a second inorganic pigment dispersion, a second curing agent, a second binder, and a second acidic substance to form the second coating solution;

Preferably, the preparation method of the second coating liquid comprises:

(a) mixing the coupling agent, the organic solvent, the pearlescent material and the water to obtain a first mixed solution;

(b) mixing the first mixed liquid with the second inorganic pigment dispersion to obtain a second mixed liquid;

(c) mixing and reacting the second mixed liquid and the second acidic substance to obtain a third mixed liquid;

(d) mixing the third mixed liquid, the second binder, and the second curing agent to form the second coating liquid.

In some embodiments of the present invention, the coupling agent, the organic solvent, the pearlescent material, the water, the dispersion of the second inorganic pigment, the second curing agent and the second The mass ratio of the binder is (0.1-5):(1-10):(1-5):(1-20):(60-88):(0.02-0.1):(1-5).

In some embodiments of the present invention, the solid content of the second inorganic pigment in the second inorganic pigment dispersion is 10-30wt%.

In some embodiments of the present invention, the average particle size of the second inorganic pigment is 150 nm, and the proportion of the second inorganic pigment with a particle size greater than 220 nm is not more than 30%.

In some embodiments of the present invention, the mixing temperature in step (a) is 40-80 degrees Celsius, and the mixing time is 40-60 minutes.

In some embodiments of the present invention, the reaction temperature in step (c) is 40-80 degrees Celsius, and the reaction time is 40-60 minutes.

In some embodiments of the present invention, the pH of the first coating liquid is 2.0-4.0.

In some embodiments of the present invention, the pH of the second coating solution is 2.0-4.0.

In some embodiments of the present invention, the pH of the third coating liquid is 2.0-4.0.

In some embodiments of the present invention, the second acidic substance is selected from at least one of sulfuric acid and nitric acid.

In some embodiments of the present invention, the second curing agent is selected from at least one of aldehyde compounds, boric acid, borate and chromium alum.

In some embodiments of the present invention, the third acidic substance is selected from at least one of sulfuric acid and nitric acid.

In some embodiments of the present invention, the first curing agent is selected from at least one of aldehyde compounds, boric acid, borate and chromium alum.

In some embodiments of the present invention, the third curing agent is selected from at least one of aldehyde compounds, boric acid, borate and chromium alum.

In some embodiments of the present invention, the first coating liquid also includes at least A sort of.

In some embodiments of the present invention, the second coating liquid also includes at least A sort of

In some embodiments of the present invention, the third coating liquid also includes at least A sort of

In a third aspect of the present invention, the present invention provides a printing device. According to an embodiment of the present invention, the printing device has the inkjet material described in the above embodiment or the inkjet material prepared by the method described in the above embodiment. Therefore, the printing device has all the advantages of the above-mentioned inkjet materials, which will not be repeated here.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the structural representation of the ink-jet material of an embodiment of the present invention;

Fig. 2 is the flowchart of the preparation method of the inkjet material of an embodiment of the present invention;

Fig. 3 is a flow chart of a method for preparing a second coating liquid according to an embodiment of the present invention.

Reference signs:

100-dielectric layer, 110-first coating, 120-second coating, 130-third coating.

detailed description

Embodiments of the present invention are described in detail below, and examples of the above-mentioned embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In one aspect of the present invention, the present invention provides an inkjet material. According to an embodiment of the present invention, with reference to accompanying drawing 1, ink-jet material comprises: dielectric layer 100; Pigment and the first binder; the second coating 120, the second coating 120 is arranged on the side of the first coating 110 away from the dielectric layer 100, the second coating includes pearlescent material, the second inorganic pigment and the first Two binders; a third coating 130, the third coating 130 is disposed on the side of the second coating 120 away from the first coating 110, the third coating includes a third inorganic pigment and a third binder. Thus, the inkjet material of the present invention not only realizes the ink-fixing effect of inkjet but also realizes the pearlescent effect of inkjet printing by setting multi-layer coating, and the image will not affect the pearlescent effect, and the pearlescent effect will not be affected. It will affect the ink absorption effect.

Wherein, the third coating ensures that visible light can reach the second coating, and the third inorganic pigment in the third coating fixes most of the dyes or pigments in the inkjet ink on the third coating. The pearlescent material of the second coating realizes the pearlescent effect of the product, and the second inorganic pigment of the second coating ensures the ink absorption performance of the second coating; the first coating quickly absorbs most of the water in the inkjet ink, The first inorganic pigment of the first coating further ensures the ink-fixing effect on the inkjet ink.

According to some specific embodiments of the present invention, the particle size of the first inorganic pigment is 0.01-0.5 microns, thus, limiting the particle size of the first inorganic pigment to the above range ensures that the first coating can absorb most of the water in the inkjet , so as to ensure the quality of the printed product and the safety of the printing process, and avoid the reduction of the ink absorption capacity of the first coating.

According to still some specific embodiments of the present invention, the thickness of the first coating is 28-35 microns, thus, the thickness of the first coating is limited in the above range, ensuring that the first coating can quickly absorb the Most of the moisture, so as to ensure the quality of the printed product and the safety of the printing process, and avoid the reduction of the ink absorption capacity of the first coating.

According to still some specific embodiments of the present invention, the mass ratio of the first inorganic pigment to the first binder is (5-25): 1, thus, the mass ratio of the first inorganic pigment to the first binder is limited to the above-mentioned In the range, it is ensured that the first coating has good porosity. The inventors have found that if the mass ratio of the first inorganic pigment to the first binder is too small, the porosity of the first coating will be low and the ink absorption performance of the first coating will be reduced. If the first inorganic pigment and the first binder If the mass ratio of the adhesive is too large, the first coating will have problems such as poor adhesion, resistance to bending, and easy cracking.

In the embodiment of the present invention, the material type of the first inorganic pigment is not particularly limited. As a specific example, the material of the first inorganic pigment is selected from at least one of calcium carbonate and aluminum oxide; similarly, the first The type of binder is not particularly limited, and as a specific example, the first binder is a polyvinyl alcohol solution.

According to still some specific embodiments of the present invention, the opacity of the pearlescent material on the second coating is 20%-50%, thus, by limiting the opacity of the pearlescent material on the second coating to the above range, The orderly arranged pearlescent layer has a suitable opening ratio in the second coating, so that the second coating can provide a good pearlescent effect while further ensuring the penetration channel of the ink, while further inhibiting the printing of high-density ink When the ink penetrates downward and encounters the pearlescent material, the diffusion phenomenon occurs. The inventors found that if the covering ratio of the pearlescent material on the second coating is too small, the pearlescent effect of the second coating cannot be guaranteed, resulting in poor pearlescent effect of the printed product. If the covering ratio of the pearlescent material on the second coating is too large (that is, the opening ratio of the pearlescent layer in the second coating is too small), the penetration channel of the ink cannot be guaranteed, which will affect the ink absorption performance of the second coating. It has an impact, resulting in insufficient ink absorption of the second coating, thereby reducing the density of the printed image; at the same time, it will also cause the diffusion phenomenon caused by the ink penetrating downward and encountering the pearlescent material when the high-density ink is printed, thereby reducing the detailed expression of the image . It can be understood that the larger the hiding ratio of the pearlescent material on the second coating, the smaller the opening ratio of the pearlescent layer in the second coating, and the smaller the hiding ratio of the pearlescent material on the second coating, then The greater the open porosity of the pearlescent layer in the second coating. It should be explained that the covering ratio of the pearlescent material on the second coating refers to the percentage of the area of the orthographic projection of the pearlescent material on the second coating to the total area of the second coating.

According to still some specific embodiments of the present invention, at least part of the second inorganic pigment is coated on the surface of the pearlescent material to further improve the detailed expression of the printed product and ensure that when the inkjet volume reaches the maximum during the inkjet process, Pearlescent material still does not cause any impact on the details of the image. The inventors found that if the surface of the pearlescent material is not coated with the second inorganic pigment, the printed product may suffer from blurring, thereby reducing the density of the printed image and reducing the detail expression of the image.

According to still some specific embodiments of the present invention, the particle size of the second inorganic pigment is 0.01-0.5 micron, thus, the particle size of the second inorganic pigment is limited within the range, ensuring the coating of the second inorganic pigment on the surface of the pearlescent material The effect makes the second coating provide good pearlescent effect while maximally inhibiting the ink diffusion effect when the amount of ink is large; at the same time, it further ensures the ink absorption effect of the second coating. Preferably, the particle size of the second inorganic pigment is 0.05-0.3 microns.

According to still some specific embodiments of the present invention, the particle size of the pearlescent material is 1-10 microns, thus, the particle size of the pearlescent material is limited within the above range, ensuring a good pearlescent effect of the printed product, and avoiding the second coating Decreased ink absorbency. The inventor found that if the particle size of the pearlescent material is too small, the pearlescent effect of the printed product will not be obvious; if the particle size of the pearlescent material is too large, it will seriously affect the ink absorption effect of the second coating, thereby significantly reducing the density of the printed image and Significantly reduces the detail expression of the image. Preferably, the particle size of the pearlescent material is 1-5 microns.

According to still some specific embodiments of the present invention, the mass ratio of the pearlescent material, the second inorganic pigment and the second binder is (1-5): (12-18): (1-5), thus, the pearlescent material , The mass ratio of the second inorganic pigment and the second binder is limited within the above range, which ensures the porosity of the pearlescent layer of the second coating. The inventors have found that if the proportion of the second binder in the mass ratio of the pearlescent material, the second inorganic pigment and the second binder is too large, the porosity of the second coating will decrease, which will absorb ink for the second coating The effect of solid ink is affected, resulting in a decrease in the details of the picture. If the proportion of the second binder in the mass ratio of the pearlescent material, the second inorganic pigment and the second binder is too small, the second coating may appear apparent ills, thereby affecting the yield.

According to still some specific embodiments of the present invention, the thickness of the second coating is 1-5 microns, thus, the thickness of the second coating is limited within the above-mentioned range, which ensures that the pearlescent effect of the printed product is good, and avoids the second Reduction in the ink absorption capacity of the coating. The inventors have found that if the second coating is too thick, the pearlescent material in the second coating may overlap, resulting in the reduction of the second coating's ink-absorbing channels, thereby reducing the ink-absorbing performance of the second coating. If the coating is too thin, there will be too little pearlescent material in the second coat, so that the pearlescent effect will be weakened or disappeared.

In the embodiment of the present invention, the type of material of the second inorganic pigment is not particularly limited. As a specific example, the second inorganic pigment is alumina. Likewise, the type of the second binder is not particularly limited, and as a specific example, the second binder is a polyvinyl alcohol solution.

According to still some specific embodiments of the present invention, the particle size of the third inorganic pigment is 0.01-0.3 microns, thus, the particle size of the third inorganic pigment is limited within the above-mentioned range, which further ensures the penetration of visible light, and simultaneously Most of the dyes or pigments in the ink are fixed in the third coat, which significantly increases the density of the printed image and significantly improves the detail expression of the image. The inventors found that if the particle size of the third inorganic pigment is too large, it will hinder the transmission of visible light, thereby affecting the pearlescent effect of the printed product.

According to still some specific embodiments of the present invention, the thickness of the third coating is 2-5 microns, thus, limiting the thickness of the third coating within the above range ensures that the third coating has good ink-fixing properties, and To avoid affecting the penetration of visible light, thereby affecting the pearlescent effect of printed products, the inventors found that if the third coating is too thick, it will seriously affect the penetration of visible light, thereby affecting the pearlescent effect of printed products. If the coating is too thin, the ink-fixing ability of the third coating will deteriorate, resulting in a decrease in image density, thereby reducing the color of the picture.

According to still some specific embodiments of the present invention, the mass ratio of the third inorganic pigment to the third binder is (5-25): 1, thereby limiting the mass ratio of the third inorganic pigment to the third binder within the range Inside, it is further ensured that the third coating has good porosity. The inventors have found that if the mass ratio of the third inorganic pigment to the third binder is too small, the porosity of the third coating will be low, making the third coating's ability to fix ink worse. If the third inorganic pigment and the third binder If the mass ratio of the three binders is too large, the third coating will have problems such as poor adhesion, resistance to bending, and easy cracking.

In the embodiment of the present invention, the material type of the third inorganic pigment is not particularly limited. As a specific example, the material of the third inorganic pigment is alumina; similarly, the type of the third binder is not particularly limited. As a limitation, as a specific example, the third binder is a polyvinyl alcohol solution.

According to the inkjet material of the embodiment of the present invention, the third coating of the present invention ensures that visible light can reach the second coating, and the third inorganic pigment in the third coating fixes most of the dyes or pigments in the inkjet ink on the third coating. coating; the pearlescent material of the second coating realizes the pearlescent effect of the product, and the second inorganic pigment of the second coating ensures the ink absorption performance of the second coating; the first coating removes most of the moisture in the inkjet ink Rapid absorption, the first inorganic pigment of the first coating further ensures the ink-fixing effect on the inkjet ink. The inkjet material of the present invention not only realizes the ink-fixing effect of inkjet but also realizes the pearlescent effect of inkjet printing by setting a multi-layer coating, and the image will not affect the pearlescent effect, and the pearlescent effect will not interfere with the image expression of details.

In yet another aspect of the present invention, referring to FIG. 2 , the present invention proposes a method for preparing an inkjet material. According to an embodiment of the invention, the method includes:

S100: Coating the first coating with the first coating solution

In this step, the first coating liquid is coated on one side of the medium layer, so as to form the first coating layer on the medium layer.

According to some specific embodiments of the present invention, the preparation method of the first coating liquid comprises:

A first inorganic pigment, water, a first binder, and a first curing agent are mixed to form a first coating liquid.

Preferably, the preparation method of the first coating liquid comprises:

mixing the first inorganic pigment with water to obtain the first inorganic pigment mixed liquid;

The first inorganic pigment mixed liquid, the first binder and the first curing agent are mixed to obtain the first coating liquid.

According to still some specific embodiments of the present invention, the pH of the third coating liquid is 2.0-4.0.

In the embodiments of the present invention, the specific type of the first curing agent is not particularly limited. As some specific examples, the first curing agent is selected from at least one of aldehyde compounds, boric acid, borate and chromium alum.

According to some other specific embodiments of the present invention, the first coating liquid also includes at least one of a dispersant, a tackifier, a fluidity modifier, a surfactant, a defoamer, a fluorescent whitening agent, and an ultraviolet absorber A kind of, wherein, the effect of dispersant is to realize better dispersion to the first inorganic pigment, the effect of tackifier is to control the viscosity of the first coating liquid, the effect of fluidity modifier is to improve the surface of the first coating Viewing the situation, the function of the surfactant is to control the surface tension, which is beneficial to the first coating process of the first coating solution, the function of the defoamer is to eliminate the bubbles generated during the configuration process, and the function of the fluorescent whitening agent It is to increase the whiteness of printed products. The function of UV absorber is to absorb ultraviolet rays and prevent yellowing of printed products.

S200: Coating a second coating with a second coating liquid

In this step, the second coating liquid is coated on the side of the first coating away from the dielectric layer, so as to form the second coating on the side of the first coating away from the dielectric layer.

According to still some specific embodiments of the present invention, the preparation method of the second coating liquid comprises:

A coupling agent, an organic solvent, a pearlescent material, water, a dispersion liquid of a second inorganic pigment, a second curing agent, a second binder, and a second acidic substance are mixed to form a second coating liquid.

According to some other specific embodiments of the present invention, with reference to accompanying drawing 3, the preparation method of the second coating liquid comprises:

(a) Mix the coupling agent, organic solvent, pearlescent material and water to obtain the first mixed solution, thus, the coupling agent first reacts with the pearlescent material, which is conducive to the better coating of the second inorganic pigment on the The surface of the pearlescent material, and make the pearlescent material easier to disperse and arrange.

(b) Mixing the first mixed liquid and the dispersion liquid of the second inorganic pigment to obtain a second mixed liquid, whereby the second inorganic pigment is coated on the surface of the pearlescent material through a coupling agent.

(c) Mixing and reacting the second mixed solution and the second acidic substance to obtain a third mixed solution, thereby controlling the thickness of the second inorganic pigment coated on the surface of the pearlescent material and the aggregation size of the second inorganic pigment.

(d) mixing the third mixed liquid, the second binder and the second curing agent to form the second coating liquid, thus, it is beneficial to better realize the second coating liquid to coat the second coating Purpose.

According to still some specific embodiments of the present invention, the mass ratio of the coupling agent, the organic solvent, the pearlescent material, water, the dispersion liquid of the second inorganic pigment, the second curing agent and the second binder is (0.1-5): (1-10): (1-5): (1-20): (60-88): (0.02-0.1): (1-5), thus, coupling agent, organic solvent, pearlescent material, The mass ratio of water, the dispersion liquid of the second inorganic pigment, the second curing agent and the second binder is limited in the above range, which further ensures the uniformity of distribution of the pearlescent material in the second coating liquid, and further improves the performance of the second coating liquid. The connectivity and bending resistance of the second coating obtained by drawing the second coating liquid further enhances the ink absorption performance of the second coating obtained by drawing the second coating liquid, and enables the second coating liquid to meet the requirements of coating. The fluid performance required by the cloth equipment.

According to still some specific embodiments of the present invention, the solid content of the second inorganic pigment in the dispersion liquid of the second inorganic pigment is 10-30wt%, thus, the solid content of the second inorganic pigment in the dispersion liquid of the second inorganic pigment Within the above range, it is ensured that the second coating has good ink absorption performance, and at the same time, it is further ensured that the second inorganic pigment can be evenly covered on the pearlescent material, so that the pearlescent effect of the printed product can be realized, and a relatively high ink absorption rate can be ensured. Good image detail expression.

According to still some specific embodiments of the present invention, the average particle size of the second inorganic pigment is 150 nanometers, and the number of second inorganic pigments with a particle size greater than 220 nanometers accounts for no more than 30%, thus ensuring that the second inorganic pigment is The covering effect of the surface of the pearlescent material enables the second coating to provide a good pearlescent effect while maximally suppressing the ink diffusion effect when the amount of ink is large, and further ensures the ink absorption effect of the second coating.

According to still some specific embodiments of the present invention, the mixing temperature in step (a) is 40-80 degrees Celsius, and the mixing time is 40-60 minutes, thereby further controlling the degree of hydrolysis of the coupling agent and speeding up the actual production process.

According to still some specific embodiments of the present invention, the reaction temperature in step (c) is 40-80 degrees Celsius, and the reaction time is 40-60 minutes, thus, further controlling the pH of the second coating liquid is beneficial to the actual production process .

According to still some specific embodiments of the present invention, the pH of the second coating liquid is 2.0-4.0.

In the embodiment of the present invention, the type of the second acidic substance is not specifically limited. As a specific example, the second acidic substance is selected from at least one of sulfuric acid and nitric acid.

In an embodiment of the present invention, the function of the second curing agent is to achieve curing and crosslinking of the second coating. The specific type of the second curing agent is not particularly limited. As some specific examples, the second curing agent is selected from at least one of aldehyde compounds, boric acid, borate and chromium alum.

According to some other specific embodiments of the present invention, the second coating liquid also includes a dispersant, a tackifier, a lubricant, a fluidity modifier, a surfactant, a defoamer, a water repellant, a release agent, a fluorescent At least one of whitening agent, ultraviolet absorber and antioxidant. Dispersants, tackifiers, lubricants, fluidity modifiers, surfactants, defoamers, water repellents, mold release agents, optical brighteners, ultraviolet rays, absorbers and antioxidants in the third coating liquid The function played is the same as that played in the first coating solution, and will not be repeated here.

S300: Applying the third coating with the third coating solution

In this step, the third coating liquid is coated on the side of the second coating away from the first coating, so as to form the third coating on the side of the second coating away from the first coating.

According to some other specific embodiments of the present invention, the preparation method of the third coating liquid includes:

A third inorganic pigment, water, a third binder, a third acidic substance, and a third curing agent are mixed to form a third coating liquid.

Preferably, the preparation method of the third coating liquid comprises:

mixing the third inorganic pigment with water to obtain a third inorganic pigment mixed liquid;

The third inorganic pigment mixed liquid, the third acidic substance, the third binder and the third curing agent are mixed to obtain the first coating liquid.

According to still some specific embodiments of the present invention, the pH of the third coating liquid is 2.0-4.0.

In the embodiment of the present invention, the type of the third acidic substance is not specifically limited. As a specific example, the third acidic substance is selected from at least one of sulfuric acid and nitric acid.

In an embodiment of the present invention, the function of the third curing agent is to achieve curing and crosslinking of the third coating. The specific type of the third curing agent is not particularly limited. As some specific examples, the third curing agent is selected from at least one of aldehyde compounds, boric acid, borate and chromium alum.

According to still some specific embodiments of the present invention, the third coating liquid also includes dispersants, tackifiers, lubricants, fluidity modifiers, surfactants, defoamers, water repellents, release agents, fluorescence enhancers At least one of whitening agent, ultraviolet absorber and antioxidant. Dispersants, tackifiers, lubricants, fluidity modifiers, surfactants, defoamers, water repellents, mold release agents, optical brighteners, ultraviolet rays, absorbers and antioxidants in the third coating liquid The function played is the same as that played in the first coating solution, and will not be repeated here.

In the embodiment of the present invention, the crushing method of the first inorganic pigment is not specifically limited. As a specific example, the crushing method of the first inorganic pigment is selected from at least one of pulverizer crushing, grinding bowl grinding and ball mill ball milling; Likewise, the crushing method of the second inorganic pigment is not specifically limited. As a specific example, the crushing method of the second inorganic pigment is selected from at least one of pulverizer crushing, grinding bowl grinding and ball mill ball milling; similarly, the pearlescent material The crushing mode of the pearlescent material is not specifically limited, and as a specific example, the crushing mode of the pearlescent material is selected from at least one of pulverizer pulverization, grinding bowl grinding and ball mill ball milling; similarly, the crushing mode of the third inorganic pigment is not specifically limited , as a specific example, the crushing method of the third inorganic pigment is selected from at least one of pulverizer crushing, grinding bowl grinding and ball mill ball milling.

In an embodiment of the present invention, the device for coating the first coating liquid is not specifically limited. As a specific example, the device for coating the first coating liquid is selected from a knife coater, an air knife coater , a roll coater, a curtain coater, a bar coater, a gravure coater, and a die coater sprayer; likewise, the device for coating the second coating liquid is not particularly limited , as a specific example, the device for coating the second coating liquid is selected from blade coater, air knife coater, roll coater, curtain coater, bar coater, gravure coater and At least one of die coater and sprayer; Similarly, the device for coating the third coating liquid is not specifically limited, as a specific example, the device for coating the third coating liquid is selected from knife coater , at least one of an air knife coater, a roll coater, a curtain coater, a bar coater, a gravure coater and a die coater spray coater.

According to the method for preparing an inkjet material according to an embodiment of the present invention, the present invention uses the first coating liquid to coat the first coating, the second coating liquid to coat the second coating, and the third coating liquid to coat the third coating. The coating further ensures that the first inorganic pigment and the first binder are more evenly distributed on the first coating, and the pearlescent material, the second inorganic pigment and the second binder are more evenly distributed on the second coating , the third inorganic pigment and the third binder are more evenly distributed on the third coating,

The ink-fixing effect of the third coating is further enhanced; the pearlescent effect of the second coating is further enhanced; and the rapid absorption of most of the water in the inkjet ink by the first coating is further enhanced. As a result, the ink-fixing effect of the inkjet material on the inkjet and the pearlescent effect of inkjet printing are improved, the density of the printed image is improved, the pearlescent effect of the printed image is enhanced, and the detailed expression of the image is enhanced.

In a third aspect of the present invention, the present invention proposes a printing device. According to an embodiment of the present invention, a printing device has the inkjet material of the above embodiment or the inkjet material prepared by the method of the above embodiment. Therefore, the printing device has all the advantages of the inkjet material, which will not be repeated here.

The present invention will be described below with reference to specific embodiments. It should be noted that these embodiments are only illustrative and do not limit the present invention in any way.

Example 1

(1) 600 grams of water and 300 grams of nano-alumina are dispersed and mixed in a high-shear disperser, the high-shear disperser rotating speed is 8000 rpm, and the dispersion time is 20 minutes to form an aluminum oxide solution. The sulfuric acid is mixed with the alumina solution to adjust the pH value to 3.5 to obtain a nano-alumina dispersion solution.

(2) Get 100 grams of nano-alumina dispersion solution and mix it with 11 grams of PVA217, the mass concentration of PVA217 is 10%, and the mixing temperature is 45 ° C, then add 5 milliliters of surfactant 1283 and mix it, the content of surfactant 1283 The mass concentration is 20%, the mixing time is 10 minutes, and then 3 grams of boric acid is added for mixing, the mass concentration of boric acid is 2%, and the mixing time is 10 minutes, thereby obtaining the third coating liquid.

(3) Mix 0.5 gram of 560 coupling agent and 10 gram of polyvinyl alcohol solution evenly, then add it into 5 gram of pearlescent powder, mix for 5 minutes, then add 20 gram of deionized water to stir, the stirring speed is 200 rev/min, stirring temperature is 40 degrees centigrade, and stirring time is 60 minutes, so that obtain the first mixed solution; Then the boehmite dispersion liquid of 64.5 grams is mixed with the first mixed solution, and the boehmite average particle size is 150 nanometers, The proportion of particles larger than 220 nanometers is no more than 30%, so as to form the second mixed solution; then the second mixed solution is mixed with nitric acid, the mixing temperature is 40 degrees Celsius, and the mixing time is 1 hour, thereby adjusting the pH value to 2 , to obtain the third mixed solution.

(4) 15.3 grams of the third mixed solution, 5.3 grams of PVA217, and 303 grams of water are mixed, and the mass concentration of PVA217 is 10%, and then 6 grams of FS-31 are added to mix, and the mass concentration of FS-31 is 10%. After 10 minutes, 26 grams of boric acid was added and mixed, and the mass concentration of boric acid was 2%, so as to obtain the second coating liquid.

(5) disperse and mix 600 grams of water and 300 grams of nano-alumina in a sand mill, the sand mill rotating speed is 8000 rpm, and the dispersion time is 20 minutes to obtain a nano-calcium carbonate dispersion solution.

(6) get 100 gram nano calcium carbonate dispersion solutions and mix with 15 gram PVA217, the mass concentration of PVA217 is 10%, and mixing temperature is 45 ℃, and mixing time is 20 minutes, then adds 15 milliliters of tensio-active agents 1283 and mixes, surface The mass concentration of active agent 1283 was 20%, and the mixing time was 10 minutes. Then, 4 grams of boric acid was added for mixing. The mass concentration of boric acid was 2%, and the mixing time was 10 minutes, so as to obtain the first coating liquid.

(7) Use the quantitative plane coating machine to successively coat the first coating coating liquid, the second coating coating liquid, and the third coating coating liquid successively on 260 grams of plastic-coated paper bases, and in 100 Drying at ℃, the thickness of the first coating is 28 microns after drying, the coating thickness of the second coating is 1 micron after drying, and the thickness of the third coating is 5 microns after drying.

Example 2

(1) 600 grams of water and 300 grams of nano-alumina are dispersed and mixed in a high-shear disperser, the high-shear disperser rotating speed is 8000 rpm, and the dispersion time is 20 minutes to form an aluminum oxide solution. The sulfuric acid is mixed with the alumina solution to adjust the pH value between 3.5 to obtain a nano-alumina dispersion solution.

(2) Get 100 grams of nano-alumina dispersion solution and mix it with 11 grams of PVA217, the mass concentration of PVA217 is 10%, and the mixing temperature is 45 ° C, then add 5 milliliters of surfactant 1283 and mix it, the content of surfactant 1283 The mass concentration is 20%, the mixing time is 10 minutes, and then 3 grams of boric acid is added for mixing, the mass concentration of boric acid is 2%, and the mixing time is 10 minutes, thereby obtaining the third coating liquid.

(3) Mix 1 gram of 560 coupling agent with 10 grams of polyvinyl alcohol solution, then add it to 5 grams of pearlescent powder, mix for 5 minutes, then add 20 grams of deionized water to stir, and the stirring speed is 200 revs/min, stirring temperature is 40 degrees centigrade, and stirring time is 60 minutes, so that obtain the first mixed solution; Then the boehmite dispersion liquid of 64 grams is mixed with the first mixed solution, and the average particle size of boehmite is 150 nanometers, The proportion of particles larger than 220 nanometers is no more than 30%, so as to form a second mixed solution; then mix the second mixed solution with nitric acid, the mixing temperature is 40 degrees Celsius, and the mixing time is 1 hour, thereby adjusting the pH value to 2 , to obtain the third mixed solution.

(4) 15.3 grams of the third mixed solution, 11.2 grams of PVA217, and 153 grams of water are mixed, and the mass concentration of PVA217 is 10%, and then 4 grams of FS-31 are added to mix, and the mass concentration of FS-31 is 10%. After 10 minutes, 50 grams of boric acid was added and mixed, and the mass concentration of boric acid was 2%, so as to obtain the second coating liquid.

(5) disperse and mix 600 grams of water and 300 grams of nano-alumina in a sand mill, the sand mill rotating speed is 8000 rpm, and the dispersion time is 20 minutes to obtain a nano-calcium carbonate dispersion solution.

(6) get 100 gram nano calcium carbonate dispersion solutions and mix with 15 gram PVA217, the mass concentration of PVA217 is 10%, and mixing temperature is 45 ℃, and mixing time is 20 minutes, then adds 15 milliliters of tensio-active agents 1283 and mixes, surface The mass concentration of active agent 1283 was 20%, and the mixing time was 10 minutes. Then, 4 grams of boric acid was added for mixing. The mass concentration of boric acid was 2%, and the mixing time was 10 minutes, so as to obtain the first coating liquid.

(7) Use the quantitative plane coating machine to successively coat the first coating coating liquid, the second coating coating liquid, and the third coating coating liquid successively on 260 grams of plastic-coated paper bases, and in 100 Drying at ℃, the coating thickness is 30 microns after the first coating is dried, the coating thickness is 5 microns after the second coating is dried, and the thickness of the third coating is 5 microns after drying.

Example 3

(1) 600 grams of water and 300 grams of nano-alumina are dispersed and mixed in a high-shear disperser, the high-shear disperser rotating speed is 8000 rpm, and the dispersion time is 20 minutes to form an aluminum oxide solution. The sulfuric acid is mixed with the alumina solution to adjust the pH value between 3.5 to obtain a nano-alumina dispersion solution.

(2) Get 100 grams of nano-alumina dispersion solution and mix it with 11 grams of PVA217, the mass concentration of PVA217 is 10%, and the mixing temperature is 45 ° C, then add 5 milliliters of surfactant 1283 and mix it, the content of surfactant 1283 The mass concentration is 20%, the mixing time is 10 minutes, and then 3 grams of boric acid is added for mixing, the mass concentration of boric acid is 2%, and the mixing time is 10 minutes, thereby obtaining the third coating liquid.

(3) Mix 0.1 gram of 560 coupling agent with 5 grams of polyvinyl alcohol solution, then add it to 1 gram of pearlescent powder, mix for 5 minutes, then add 5.9 grams of deionized water to stir, and the stirring speed is 200 revs/min, stirring temperature is 40 degrees centigrade, and stirring time is 60 minutes, so that obtain the first mixed solution; Then the boehmite dispersion liquid of 88 grams is mixed with the first mixed solution, and the boehmite average particle size is 150 nanometers, The proportion of particles larger than 220 nanometers is no more than 30%, so as to form a second mixed solution; then mix the second mixed solution with nitric acid, the mixing temperature is 40 degrees Celsius, and the mixing time is 1 hour, thereby adjusting the pH value to 2 , to obtain the third mixed solution.

(4) 15.3 grams of the third mixed solution, 11.2 grams of PVA217, and 153 grams of water are mixed, and the mass concentration of PVA217 is 10%, and then 4 grams of FS-31 are added to mix, and the mass concentration of FS-31 is 10%. After 10 minutes, 50 grams of boric acid was added and mixed, and the mass concentration of boric acid was 2%, so as to obtain the second coating liquid.

(5) disperse and mix 600 grams of water and 300 grams of nano-alumina in a sand mill, the sand mill rotating speed is 8000 rpm, and the dispersion time is 20 minutes to obtain a nano-calcium carbonate dispersion solution.

(6) get 100 gram nano calcium carbonate dispersion solutions and mix with 15 gram PVA217, the mass concentration of PVA217 is 10%, and mixing temperature is 45 ℃, and mixing time is 20 minutes, then adds 15 milliliters of tensio-active agents 1283 and mixes, surface The mass concentration of active agent 1283 was 20%, and the mixing time was 10 minutes. Then, 4 grams of boric acid was added for mixing. The mass concentration of boric acid was 2%, and the mixing time was 10 minutes, so as to obtain the first coating liquid.

(7) Use the quantitative plane coating machine to successively coat the first coating coating liquid, the second coating coating liquid, and the third coating coating liquid successively on 260 grams of plastic-coated paper bases, and in 100 Drying at ℃, the coating thickness is 30 microns after the first coating is dried, the coating thickness is 5 microns after the second coating is dried, and the thickness of the third coating is 2 microns after drying.

Comparative example 1

(1) 600 grams of water and 300 grams of nano-alumina are dispersed and mixed in a high-shear disperser, the high-shear disperser rotating speed is 8000 rpm, and the dispersion time is 20 minutes to form an aluminum oxide solution. The sulfuric acid is mixed with the alumina solution to adjust the pH value between 3.5 to obtain a nano-alumina dispersion solution.

(2) Get 100 grams of nano-alumina dispersion solution and mix it with 11 grams of PVA217, the mass concentration of PVA217 is 10%, and the mixing temperature is 45 ° C, then add 5 milliliters of surfactant 1283 and mix it, the content of surfactant 1283 The mass concentration is 20%, the mixing time is 10 minutes, and then 3 grams of boric acid is added for mixing, the mass concentration of boric acid is 2%, and the mixing time is 10 minutes, thereby obtaining the upper solid ink layer coating liquid.

(3) Get 100 grams of nanometer calcium carbonate dispersion solution and mix with 0.5 gram pearlescent powder, mixing time is 10 minutes, then add the PVA217 of 11 grams and mix, the mass concentration of PVA217 is 10%, and mixing temperature is 45 ℃, mixing Time is 20 minutes, then add 5 milliliters of surfactant 1283 for mixing, the mass concentration of surfactant 1283 is 20%, the mixing time is 10 minutes, then add 3 grams of boric acid for mixing, the mass concentration of boric acid is 2%, The mixing time was 10 minutes to obtain a lower layer ink-receiving layer coating liquid.

(4) use wire rod to coat the lower floor ink-absorbing layer coating solution on 260 grams of plastic-coated paper base, coat the upper layer solid ink layer coating solution at the lower ink-absorbing layer place away from plastic-coated paper base, and in 100 Drying at ℃, the coating thickness of the lower ink-absorbing layer is 15 microns after drying, and the coating thickness of the upper ink-fixing layer is 20 microns after drying.

Comparative example 2

(1) Add 300 grams of nano-alumina to 600 grams of water and disperse for 20 minutes under a high-shear disperser (greater than 8000 rpm), then use nitric acid to adjust the pH value to between 3.5 to obtain a nano-alumina dispersion.

(2) get 100 gram nano-alumina dispersions, stir 20 minutes after adding PVA217 (10%) 11 grams at 45 ℃, add 5 milliliters of tensio-active agent 1283 (20%) and stir 10 minutes again, add boric acid 3g ( 2%) was stirred for 10 minutes to obtain the upper layer ink-absorbing layer coating liquid.

(3) Get 100 grams of nano-alumina dispersion, add 2 grams of pearlescent powder and stir for 10 minutes at 45 ° C after adding 11 grams of PVA217 (10%) and stir for 20 minutes, add 5 milliliters of surfactant 1283 (20%) and then Stir for 10 minutes, then add 3 g (2%) of boric acid and stir for 10 minutes to obtain the lower ink-absorbing layer coating solution.

(4) Use a wire rod to coat the ink-fixing layer coating solution and the ink-absorbing layer coating solution sequentially on 260 grams of plastic-coated paper base, and dry at 100°C. The thickness of the coating after the lower layer is dried is required to be 25 microns, the coating thickness is 5 microns after the upper layer is dried.

testing method:

(1) Ink absorption time

Lines 3 mm wide and 15 cm long were printed in cyan and black on the recording body using an inkjet printer (MJ-700V 2C, manufactured by Seiko Epson). Immediately after the printing is completed, wipe the line with your fingers. If there is no ink on your hand, it is qualified, and if there is ink, it is unqualified. The amount of ink at this time was about 0.4 μl/cm ² .

(2) surface gloss

Using Nippon Denshoku Kogyo Co., Ltd. VGS-1001DP, the reflectance of incident light and reflected light at 60 degrees was obtained for the recording body.

(3) Color density

5 cm ² of inks of cyan (C), magenta (M), yellow (Y) and black (B) were printed on the recording medium by the printer of (1). Reflection densities were measured with a Macbeth densitometer (TR-927) and printed using no color control conditions.

Table 1

Through the above comparison, it can be seen that compared with the inkjet consumables prepared in Example 1, Example 2 and Example 3, the inkjet consumables prepared in Comparative Example 1 have a qualified ink absorption time, but the surface gloss and color density are relatively low. Compared with the inkjet consumables prepared in Example 1, Example 2, and Example 3, the inkjet consumables prepared in Comparative Example 2 have unqualified ink absorption time, and the surface gloss and color density have significantly decreased. .

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. An inkjet material comprising:

a dielectric layer;

the first coating is arranged on one side of the dielectric layer and comprises a first inorganic pigment and a first binder;

a second coating layer, wherein the second coating layer is arranged on the side, far away from the dielectric layer, of the first coating layer, and the second coating layer comprises a pearlescent material, a second inorganic pigment and a second adhesive;

a third coating disposed on a side of the second coating distal from the first coating, the third coating comprising a third inorganic pigment and a third binder.

2. The inkjet material of claim 1 wherein the coverage of said pearlescent material on said second coating layer is from 20% to 50%;

optionally, at least a portion of the second inorganic pigment is coated on the surface of the pearlescent material;

optionally, the second inorganic pigment is alumina;

optionally, the particle size of the second inorganic pigment is from 0.01 to 0.5 microns, preferably from 0.05 to 0.3 microns;

optionally, the pearlescent material has a particle size of 1-10 microns, preferably 1-5 microns;

optionally, the mass ratio of the pearlescent material, the second inorganic pigment and the second binder is (1-5): (12-18): (1-5);

optionally, the second coating thickness is 1-5 microns.

3. The inkjet material of claim 1, wherein the first inorganic pigment particle size is 0.01-0.5 micron;

optionally, the third inorganic pigment has a particle size of 0.01 to 0.3 microns;

optionally, the first coating thickness is 28-35 microns;

optionally, the third coating thickness is 2 to 5 microns;

optionally, the mass ratio of the first inorganic pigment to the first binder is (5-25): 1;

optionally, the third inorganic pigment to third binder mass ratio is (5-25): 1.

4. the inkjet material according to claim 1, wherein the material of the first inorganic pigment is selected from at least one of calcium carbonate and alumina;

optionally, the material of the second inorganic pigment is alumina;

optionally, the material of the third inorganic pigment is alumina;

optionally, the first binder, the second binder, and the third binder are each independently a polyvinyl alcohol solution.

5. A method of preparing the inkjet material of any one of claims 1 to 4, comprising:

(1) Coating a first coating liquid on one side of a dielectric layer so as to form a first coating on the dielectric layer;

(2) Coating a second coating liquid on the side, far away from the dielectric layer, of the first coating so as to form a second coating on the side, far away from the dielectric layer, of the first coating;

(3) And coating a third coating liquid on the side of the second coating far away from the first coating so as to form a third coating on the side of the second coating far away from the first coating.

6. The method according to claim 5, wherein the first coating liquid is prepared by a method comprising:

mixing a first inorganic pigment, water, a first binder, and a first curing agent to form the first coating liquid;

optionally, the preparation method of the third coating liquid comprises:

mixing a third inorganic pigment, water, a third binder, a third acidic substance, and a third curing agent to form the third coating liquid.

7. The method according to claim 5, wherein the second coating liquid is prepared by a method comprising:

mixing a coupling agent, an organic solvent, a pearlescent material, water, a dispersion of a second inorganic pigment, a second curing agent, a second binder, and a second acidic substance to form the second coating liquid;

preferably, the preparation method of the second coating liquid comprises:

(a) Mixing the coupling agent, the organic solvent, the pearlescent material and the water to obtain a first mixed solution;

(b) Mixing the first mixed solution and the dispersion liquid of the second inorganic pigment to obtain a second mixed solution;

(c) Mixing the second mixed solution and the second acidic substance for reaction to obtain a third mixed solution;

(d) Mixing the third mixed solution, the second adhesive and the second curing agent to form the second coating liquid.

8. The method according to claim 7, characterized in that the mass ratio of the coupling agent, the organic solvent, the pearlescent material, the water, the dispersion of the second inorganic pigment, the second curing agent and the second binder is (0.1-5): (1-10): (1-5): (1-20): (60-88): (0.02-0.1): (0.5-5);

optionally, the second inorganic pigment has a solid content of 10 to 30wt% in the dispersion of the second inorganic pigment;

optionally, the second inorganic pigment has an average particle size of 150 nm and the number of particle sizes of the second inorganic pigment greater than 220 nm does not exceed 30%;

optionally, the mixing temperature in step (a) is 40-80 ℃ and the mixing time is 40-60 minutes;

optionally, the reaction temperature in step (c) is 40-80 ℃ and the reaction time is 40-60 minutes;

optionally, the pH of the first coating liquid is 2.0-4.0;

optionally, the pH of the second coating liquid is 2.0-4.0;

optionally, the third coating liquid has a pH of 2.0 to 4.0;

optionally, the second acidic substance is selected from at least one of sulfuric acid and nitric acid;

optionally, the second curing agent is at least one selected from aldehydes, boric acid, borates, and chrome alum.

9. The method of claim 6, wherein, optionally, the third acidic substance is selected from at least one of sulfuric acid and nitric acid;

optionally, the first curing agent is selected from at least one of aldehydes, boric acid, borate and chrome alum;

optionally, the third curing agent is selected from at least one of aldehydes, boric acid, borate and chrome alum;

optionally, the first coating liquid further comprises at least one of a dispersant, a tackifier, a fluidity modifier, a surfactant, a defoaming agent, a fluorescent whitening agent and an ultraviolet absorber;

optionally, the second coating liquid further comprises at least one of a dispersant, a tackifier, a fluidity modifier, a surfactant, a defoaming agent, a fluorescent whitening agent and an ultraviolet absorber;

optionally, the third coating liquid further comprises at least one of a dispersant, a tackifier, a fluidity modifier, a surfactant, a defoaming agent, a fluorescent whitening agent, and an ultraviolet absorber.

10. A printing apparatus comprising the inkjet material according to any one of claims 1 to 4 or the inkjet material produced by the method according to any one of claims 5 to 9.

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