Printing sheet with visual three-dimensional effect and preparation method thereof

Abstract

The invention discloses a printing sheet with a visual three-dimensional effect and a preparation method thereof. According to the preparation method, a novel special coating made of metal powder with different refraction effects is printed and coated on a base material, and the operation of the next unit can be carried out without waiting. Under the condition that the coating is not dry, a resin plate subjected to special lattice point distribution treatment is utilized, patterns on the plate are re-carved on the special coating through proper printing pressure according to the pattern height (3-6 microns) and the hardness (60-70 Shore hardness) of the resin plate, and due to different lattice point distribution, the distribution and arrangement of ink powder are organized in order, so that the printing effect is improved, and the printing effect is improved. The thickness of accumulated powder leads to different refraction levels for light, the different refraction levels which are arranged in order enable corresponding different light and shade levels to be generated visually, and a three-dimensional embossment effect of corresponding patterns is generated visually.

Description

Technical Field

[0001] The present invention belongs to the technical field of printing, and particularly relates to a printing sheet with a visual three-dimensional effect and a preparation method thereof. Background Art

[0002] At present, the commonly used grating three-dimensional or three-dimensional lithography hot stamping films in the market have high requirements for the design of lithography patterns, high costs for making embossing plates, long production cycles, and high precision requirements for machine registration. However, this new process has a high tolerance for the substrate, can meet more demanding usage requirements; moreover, the processing materials are all existing materials, the processing design process is relatively simple, it is easier to be realized under the existing machine equipment conditions, and the cost of the produced products is more competitive. Summary of the Invention

[0003] In order to overcome the deficiencies and drawbacks of the prior art, the primary object of the present invention is to provide a preparation method of a printing sheet with a visual three-dimensional effect. The preparation method specifically involves a pattern dot combination design, a special high-fluidity metal ink, a special soft resin plate, and a printing method of light curing after light touch embossing and wet leveling applied on hoses and sheets. The preparation method of the present invention coats a special coating made of a new type of metal powder with different refractive effects onto a substrate by printing, and the next unit operation can be carried out without waiting. When this coating is not dry, using a resin plate processed with a special dot distribution, the pattern on the plate with a pattern height of (3 - 6 microns) and a hardness of (60 - 70 Shore hardness) is replicated onto the special coating through appropriate printing pressure. Due to different dot distributions, the distribution and arrangement of the ink powder are organized in an orderly manner, and the thickness of the powder accumulation leads to different refractive levels for light. The orderly arranged different refractive levels result in corresponding different light and dark levels visually, and a three-dimensional relief effect of the corresponding pattern is produced visually. By combining special coating materials, innovative printing processes, and unique plate-making technologies, the regular arrangement of particles with optical properties is used to achieve directional optical reflection (or refraction) imaging, so that the surface of the printed matter presents a three-dimensional visual effect.

[0004] The second object of the present invention is to provide a printing sheet with a visual three-dimensional effect.

[0005] The third object of the present invention is to provide a hose with a visual three-dimensional effect.

[0006] The primary object of the present invention is achieved through the following technical solutions:

[0007] A preparation method of a printing sheet with a visual three-dimensional effect, comprising the following steps,

[0008] (1) Coating a leveling promoting layer on the surface of the printing substrate on the blank composite substrate layer to be printed;

[0009] (2) Coating and printing a light-absorbing and reflective high-concentration color layer on the surface of the substrate leveling promotion layer;

[0010] (3) Coating and printing a high-fluidity ultra-fine metallic texture VE3D coating on the light-absorbing and reflective high-concentration color layer,

[0011] (4) Coating and printing a high-transparency and wear-resistant protective coating on the high-fluidity ultra-fine metallic texture VE3D coating to prepare a printed sheet with a visual three-dimensional effect;

[0012] The specific steps of step (3) are as follows:

[0013] Perform height difference and dot distribution processing on the three-dimensional pattern to be prepared in advance, then copy the processed dots to a special flexible resin plate through digital plate-making technology, and then perform a light-touch press on the high-fluidity ultra-fine metallic texture VE3D coating through the special flexible resin plate. When this VE3D coating is not dry, it undergoes a leveling effect, allowing the high-fluidity ultra-fine metallic texture VE3D coating to quickly level and distribute according to the pattern after being molded by the surface structure of the special flexible resin plate, and then undergo ultraviolet curing and shaping to form a three-dimensional pattern with a visual three-dimensional effect on the high-fluidity ultra-fine metallic texture VE3D coating;

[0014] The dot production process of the three-dimensional pattern includes the following steps:

[0015] First, perform visual three-dimensional processing on the three-dimensional pattern to be prepared, screen, rasterize and position the positions that need to be prepared for visual three-dimensionalization, perform dot ratio value calculation, and vectorize the distribution to obtain a visual three-dimensional embossing file and dot data; copy the dot data to a special flexible resin plate printing plate through computer digital direct engraving technology, and during the plate washing process, it is necessary to adjust the primary exposure amount (intensity and time) to ensure that the hardness of the plate in different dot areas is within the range of Shore hardness 60-70.

[0016] Preferably, the blank composite substrate layer in step (1) is a transparent plastic sheet, an aluminum-plastic sheet, an aluminized composite sheet or a white plastic sheet. Further preferably, the material of the transparent plastic sheet or the white plastic sheet is polyethylene material.

[0017] Preferably, the substrate surface leveling promotion layer in step (1) is prepared from a surface wetting agent. Further preferably, the surface wetting agent is a silicone-based polymer.

[0018] Preferably, the printing speed of coating and printing the substrate surface leveling promotion layer in step (1) is 40-60 m / min, the anilox roll line number is 300-400 LCM, the printing pressure is 1-1.5 MPa, the UV curing power is 9000 kw, and the leveling time is 3-4 seconds.

[0019] Preferably, the light-absorbing and reflective high-concentration color layer in step (2) is prepared from a high-color-concentration pigment and a light-absorbing high-polymer monomer in a mass ratio of 1.5 - 2.5:8.5 - 7.5; the high-color-concentration pigment is an azo-based organic polymer, and the light-absorbing high-polymer monomer is an aromatic ketone-based polymer.

[0020] Preferably, in step (2), the printing speed for coating and printing the light-absorbing and reflective high-concentration color layer is 40 - 60 m / min, the number of lines of the anilox roll is 400 - 500 LCM, the printing pressure is 0.5 - 1.0 MPa, the UV curing power is 9000 kw, and the leveling time is 0.5 - 1 second.

[0021] Preferably, the thickness of the special flexible resin plate in step (3) is 1.4 - 1.8 mm, and the special flexible resin plate achieves different pressure requirements by adjusting different thicknesses, thereby controlling the die-pressing contact area to achieve different effects on the three-dimensional pattern.

[0022] Preferably, the intensity of the primary exposure amount in step (3) is 700 - 900 W / cm 2 , and the time is 350 - 400 seconds.

[0023] Preferably, the visual three-dimensional processing in step (3) includes the following steps: The dot distribution in the three-dimensional partial area adopts a non-linear step drop, ensuring that the ultra-fine metal texture coating quickly passes through and covers between different dot ratios, and the refraction angles of light between different dot ratios are more easily controlled and have good consistency, ensuring an obvious three-dimensional effect.

[0024] Preferably, the processing and production process of the high-fluidity ultra-fine metal texture VE3D coating in step (3) includes the following steps:

[0025] a. Configure polyester acrylate oligomer, trimethylolpropane tetraacrylate, modified polyurethane acrylate oligomer, and indium tin oxide crystals according to a mass percentage of 12 - 22:8 - 12:45 - 65:10 - 15;

[0026] b. Grind indium oxide crystals at low temperature to an average particle size of less than 20u, and then mix and stir with polyester acrylate oligomer, trimethylolpropane tetraacrylate, and modified polyurethane acrylate oligomer; Prepare a high-fluidity ultra-fine metal texture VE3D coating paint.

[0027] Preferably, in step a, the polyester acrylate oligomer, trimethylolpropane tetraacrylate, modified polyurethane acrylate oligomer, and indium tin oxide crystals are configured according to a mass percentage of 20:10:60:10.

[0028] Preferably, the temperature for the mixing and stirring in step b is within 25 to 35°C, the time for the mixing and stirring is 60 to 100 minutes, and the rotation speed of the stirring is 1000 to 1500 revolutions per minute.

[0029] Preferably, the viscosity of the high-fluidity ultra-fine metallic texture VE3D coating paint in step b is 100 to 200 CPS.

[0030] Among them, after the mixing is completed to form a finished product, samples need to be extracted for scraping inspection. The reflectance on a sample with a whiteness of the standard paper sample conforming to GB / T7974-2002 is greater than 80%, and the reflectance on a black cardboard with a color density greater than 2 is greater than 60%.

[0031] Preferably, the high-fluidity ultra-fine metallic texture VE3D coating in step (3) is prepared from ultra-fine metal particles and low-molecular-weight polyester acrylate oligomers in a mass ratio of 1:9.

[0032] Among them, the material used for the high-fluidity ultra-fine metallic texture VE3D coating is ultra-fine metallic texture paint; the ultra-fine metallic texture paint is prepared by ultra-light small-molecular-weight monomers and high-fluidity modified resin, in combination with nano-scale ultra-fine metal powder after multiple grindings.

[0033] Preferably, the size of the ultra-fine metal particles is 10 to 20u, and the low-molecular-weight polyester acrylate oligomer is neopentyl glycol poly(methyloxirane) diacrylate. This low-molecular-weight polyester acrylate oligomer can achieve a high-molecular material with low viscosity and high flow rate of the coating.

[0034] Preferably, in step (3), the printing speed of the high-fluidity ultra-fine metallic texture VE3D coating is 40 to 60 meters per minute, the line number of the anilox roll is 200 to 300 LCM, the printing pressure is 0.5 to 1.0 MPa, first level the surface, the time is 4 to 5 seconds, and the UV curing power is 9000 kw.

[0035] Preferably, the high-transparency wear-resistant protective coating in step (4) is prepared from an anti-glare leveling agent and a high-transparency and high-dispersibility anti-wear agent in a mass ratio of 65 to 75:35 to 25; the anti-glare leveling agent is 2-propylene glycol monoester, and the high-transparency and high-dispersibility anti-wear agent is isomeric polydimethylsiloxane.

[0036] Preferably, in step (4), the printing speed of the high-transparency wear-resistant protective coating is 40 to 60 meters per minute, the line number of the anilox roll is 100 to 200 LCM, the printing pressure is 1 to 1.5 MPa, the UV curing power is 9000 kw, and the leveling time is 3 to 4 seconds.

[0037] The second object of the present invention is achieved by the following technical solutions:

[0038] A printed sheet with a visual three-dimensional effect, prepared by the above method.

[0039] Preferably, the printed sheet with a visual three-dimensional effect sequentially includes a blank composite substrate layer, a substrate surface leveling promoting layer, a light-absorbing and reflective high-concentration color layer, a highly fluid ultra-fine metallic texture VE3D coating, and a highly transparent and wear-resistant protective coating from the inside to the outside; the substrate surface leveling promoting layer is coated and printed on the blank composite substrate layer, the light-absorbing and reflective high-concentration color layer is coated and printed on the substrate surface leveling promoting layer, the highly fluid ultra-fine metallic texture VE3D coating is coated and printed on the light-absorbing and reflective high-concentration color layer, and the highly transparent and wear-resistant protective coating is coated and printed on the highly fluid ultra-fine metallic texture VE3D coating.

[0040] Among them, the added substrate surface leveling promoting layer and light-absorbing and reflective high-concentration color layer can improve the light transmittance, provide larger reflection and refraction angles, and ensure an obvious three-dimensional effect.

[0041] The technology of the present invention improves the fluidity of the ultra-fine metallic texture coating and the dot distribution of a special flexible resin plate through scientific calculation, arranges the optical visual effects regularly, and controls the pattern optical effect distribution during the coating flow process to achieve the visual presentation of the three-dimensional effect.

[0042] The third object of the present invention is achieved by the following technical solutions:

[0043] A hose with a visual three-dimensional effect, including a hose head and a hose body, and the hose body is prepared from a printed sheet with a visual three-dimensional effect.

[0044] The present invention has the following advantages and beneficial effects compared with the prior art:

[0045] The present invention belongs to the field of printing technology, and relates to a pattern dot combination design, special high-fluidity metal ink, special flexible resin plate, and light-touch molding and leveling followed by light-curing printing on hoses and sheets. A new type of special coating made of metal powder with different refractive effects is applied to a substrate by printing, and then in the next unit, when the ultra-fine metal texture VE3D coating is not dry, a flexible resin plate with special dot distribution treatment is used for light-touch molding to replicate the dot pattern on the undried coating, and the coating is allowed to flow and distribute according to the distribution of the dots after a certain period of time, and then completely cured after the pattern is formed. The pattern height and hardness of the flexible resin plate can replicate the pattern on the plate onto the special coating through appropriate pressure. Due to the different dot distribution, the distribution and arrangement of the ink powder are orderly organized. The thickness of the powder accumulation leads to different refraction levels of light. The orderly arranged different refraction levels produce corresponding different light and dark levels visually, and visually produce a three-dimensional relief effect of the corresponding pattern. This is achieved by combining special coating materials, innovative printing processes, and unique platemaking technology to regularly arrange particles with optical properties to achieve directional optical reflection (or refraction) imaging, thereby presenting a three-dimensional visual effect. Compared with the grating stereo or stereolithography hot stamping films commonly used in the market, the technical solution of the present invention has lower costs, is more tolerant of the requirements for the substrate, can meet more stringent use requirements, and the processing technology is relatively simplified, and there is no need to wait for drying during the printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a structural diagram of a printed sheet with a visual three-dimensional effect prepared in Example 1;

[0047] Figure 2 This is a real picture of the printed sheet with a visual three-dimensional effect prepared in Example 1;

[0048] Figure 3 This is a real picture of the printed hose with a visual three-dimensional effect prepared in Example 1;

[0049] Figure 4 This is a real picture of the printed hose with a visual three-dimensional effect prepared in Example 1;

[0050] Figure 5 This is an example of VE3D dot distribution diagram. The data is only the optimal solution for the design of the corresponding tested sample, and it is not the only data that can achieve this effect;

[0051] Figure 6 This is a real picture of the printed hose with a visual three-dimensional effect prepared in Example 3;

[0052] Among them, 101 - blank composite substrate layer, 102 - substrate surface leveling promoting layer, 103 - light-absorbing and reflection high-concentration color layer, 104 - high-fluidity ultra-fine metallic texture VE3D coating, 105 - high-transparency wear-resistant protective coating. Detailed implementation mode

[0053] The present invention will be further described in detail below in conjunction with specific embodiments, but the implementation mode of the present invention is not limited thereto. The materials used in the examples of the present invention can all be obtained by purchasing in the market.

[0054] Example 1

[0055] A preparation method of a printed sheet with a visual three-dimensional effect includes the following steps:

[0056] (1) Coating a substrate surface leveling promoting layer on the blank composite substrate layer to be printed;

[0057] (2) Coating a light-absorbing and reflection high-concentration color layer on the substrate surface leveling promoting layer;

[0058] (3) Coating a high-fluidity ultra-fine metallic texture VE3D coating on the light-absorbing and reflection high-concentration color layer;

[0059] (4) Coating a high-transparency wear-resistant protective coating on the high-fluidity ultra-fine metallic texture VE3D coating to prepare a printed sheet with a visual three-dimensional effect;

[0060] The specific steps of step (3) are as follows:

[0061] Perform height difference and dot distribution processing on the three-dimensional pattern to be prepared in advance, then copy the processed dots to a special flexible resin plate through digital plate-making technology, and then perform a light-touch pressing on the high-fluidity ultra-fine metallic texture VE3D coating through the special flexible resin plate. This VE3D coating undergoes a leveling effect when it is not dry, allowing the high-fluidity ultra-fine metallic texture VE3D coating to quickly level and distribute according to the pattern after being molded by the surface structure of the special flexible resin plate, and then undergo ultraviolet curing and shaping to form a three-dimensional pattern with a visual three-dimensional effect on the high-fluidity ultra-fine metallic texture VE3D coating. The molding in this step is full-wet state molding, and the UV or hot air power is zero (the full-wet state means that the high-fluidity ultra-fine metallic texture VE3D coating is completely not dry, so the UV lamp power is zero);

[0062] The dot production process of the three-dimensional pattern includes the following steps:

[0063] First, perform visual three-dimensional processing on the three-dimensional pattern to be prepared, identify, screen, rasterize and position the positions that need to be visually three-dimensionalized, perform dot ratio value calculations, and after vectorized distribution, obtain the visual three-dimensional embossing file and dot data; use computer digital direct engraving technology to copy the dot data onto a special flexible resin plate printing plate. During the plate washing process, it is necessary to adjust the initial exposure amount (intensity and time) to ensure that the hardness of the plate in different dot areas is within the range of Shore hardness 60-70.

[0064] In step (1), the blank composite substrate layer is a transparent all-plastic sheet, and the transparent all-plastic sheet is made of polyethylene material; the surface leveling promoting layer on the substrate surface is prepared from a surface wetting agent, and the surface wetting agent is a silicone-based polymer. In this step, the printing speed for coating the surface leveling promoting layer on the printing substrate is 40-60 m / min, the screen ruling of the anilox roller is 300-400 LCM, the printing pressure is 1-1.5 MPa, the UV curing power is 9000 kw, and the leveling time is 3-4 seconds.

[0065] In step (2), the light-absorbing and reflective high-concentration color layer is prepared from a high-color-concentration pigment and a light-absorbing high-polymer monomer in a mass ratio of 1.5:8.5. The high-color-concentration pigment is an azo-based organic polymer, and the light-absorbing high-polymer monomer is an aromatic ketone-based polymer. In this step, the printing speed for coating the light-absorbing and reflective high-concentration color layer is 40-60 m / min, the screen ruling of the anilox roller is 400-500 LCM, the printing pressure is 0.5-1.0 MPa, the UV curing power is 9000 kw, and the leveling time is 0.5-1 second.

[0066] In step (3), the thickness of the special flexible resin plate is 1.4-1.8 mm. The special flexible resin plate adjusts different thicknesses to meet different pressure requirements, thereby controlling the embossing contact area to achieve different effects on the three-dimensional pattern. In this step, the intensity of the initial exposure amount is 700-900 W / cm 2 , and the time is 350-400 seconds. The visual three-dimensional processing includes the following steps: The dot distribution in the three-dimensional part area adopts a non-linear step drop to ensure that the ultra-fine metal texture coating quickly passes through and covers between different dot ratios. The refraction angles of light between different ratio dots are more easily controlled and have good consistency, ensuring an obvious three-dimensional effect.

[0067] In the processing and production process of the high-fluidity ultra-fine metal texture VE3D coating in this step, it includes the following steps:

[0068] a. Configure polyester acrylate oligomer, trimethylolpropane tetraacrylate, modified polyurethane acrylate oligomer, and tin oxide crystals according to a mass percentage of 20:10:60:10;

[0069] b. Grind indium oxide crystals at low temperature until the average particle size is less than 20u, and then mix and stir with polyester acrylate oligomer, trimethylolpropane tetraacrylate and modified polyurethane acrylate oligomer; prepare high-fluidity ultra-fine metal texture VE3D coating paint.

[0070] Preferably, the mixing and stirring temperature in step b is within the range of 25 to 35° C., the mixing and stirring time is 60 to 100 min, and the stirring speed is 1000 to 1500 rpm.

[0071] Preferably, the viscosity of the high-fluidity ultra-fine metal texture VE3D coating paint in step b is 100-200 CPS.

[0072] Among them, after the mixing is completed and the finished product is prepared, a sample needs to be taken for scraping inspection. The reflectivity of the scraped sample on a sample that meets the whiteness of the standard paper sample of GB / T7974-2002 is greater than 80%, and the reflectivity on black cardboard with a color density greater than 2 is greater than 60%.

[0073] Preferably, the high-fluidity ultrafine metal texture VE3D coating in step (3) is prepared from ultrafine metal particles and low molecular weight polyester acrylic oligomers in a mass ratio of 1:9.

[0074] Preferably, the material used for the high-fluidity ultrafine metal texture VE3D coating in step (3) is an ultrafine metal texture paint; the ultrafine metal texture paint is prepared by ultra-light small molecular weight monomers and high-fluidity modified resins, combined with multiple grinding nano-scale ultrafine metal powders.

[0075] Preferably, the size of the ultrafine metal particles is 10-20u.

[0076] Preferably, the low molecular weight polyester acrylic oligomer refers to a polymer material (neopentyl glycol polymethyl ethylene oxide diacrylate) that can achieve low viscosity and high flow rate of the coating.

[0077] Preferably, in step (3), the printing speed of the high-flow ultra-fine metal texture VE3D coating is 40-60 m / min, the number of lines of the anilox roller is 200-300 LCM, the printing pressure is 0.5-1.0 MPa, the first leveling time is 4-5 seconds, and the UV curing power is 9000 kW.

[0078] Preferably, the high-transmittance wear-resistant protective coating in step (4) is prepared from a permeability-enhancing leveling agent and a high-transmittance and highly dispersible anti-wear agent in a mass ratio of 3:1.

[0079] Preferably, the permeability-enhancing and leveling agent is 2-propylene glycol monoester, and the high-permeability and high-dispersibility anti-wear agent is isomeric polydimethylsiloxane.

[0080] In step (4), the printing speed of coating and printing the high-transparency wear-resistant protective coating is 40 - 60 m / min, the line number of the anilox roll is 100 - 200 LCM, the printing pressure is 1 - 1.5 MPa, the UV curing power is 9000 kw, and the leveling time is 3 - 4 s.

[0081] As Figure 1 shown, the printed sheet material with a visual three-dimensional effect described in this embodiment includes a blank composite substrate layer, a substrate surface leveling promoting layer, a light-absorbing and reflective high-concentration color layer, a high-fluidity ultra-fine metallic texture VE3D coating, and a high-transparency wear-resistant protective coating. As Figure 2 shown is the printed sheet material with a visual three-dimensional effect prepared in this embodiment.

[0082] The coating and printing in this embodiment can be achieved through various printing methods such as flexography, offset printing, gravure printing, digital printing, etc.

[0083] As Figures 3 to 4 shown is a physical diagram of the printed hose with a visual three-dimensional effect prepared in this embodiment. The printed hose with a visual three-dimensional effect described in this embodiment is prepared from the printed sheet material with a visual three-dimensional effect. The tube-making speed is 100 - 200 pieces / min, the system air pressure is 5 - 7 bar, the tube-making power is 10 - 60%, the welding air pressure is 2 - 3 bar, and the cooling water temperature is 15 - 25 °C.

[0084] Example 2

[0085] The difference between this embodiment and Example 1 is that the state during molding is molding in a 50% semi-wet state, and the UV or hot air power is 50% of the rated power (the rated hot air power is 2 KW).

[0086] The principle of the high-fluidity ultra-fine metallic texture VE3D coating described in the present invention:

[0087] By designing a metal-textured polymer coating with low viscosity and high leveling property, the metal particles in the coating can flow to the set area as soon as possible after being pressed. The metal particles with different stacked numbers arranged regularly have different levels of reflection and refraction of light, resulting in differences in light and shade. At the same time, the optical path of the light entering the human eye is different, and the time difference causes the light signals received by the human eye to be of different intensities, creating a visual three-dimensional effect. Before production preparation, according to the required test conditions and the desired effects, use a small electric stirrer to quickly stir at 5000 revolutions per minute for 5 minutes before use to make it evenly mixed; then pour it into the ink tank. The specific production process parameters of this embodiment are shown in the following table. As Figure 5 shown is an example of a VE3D dot distribution diagram. The data is only the optimal solution designed for the tested samples, and not only this data can achieve this effect.

[0088]

[0089] Example 3

[0090] This example, like Example 1, is in a fully wet state with all other parameters being the same. The difference is that in this example, the high-fluidity ultra-fine metallic texture VE3D coating is a silver layer, and the supporting light-absorbing and reflective high-concentration color layer is black, as Figure 6 shown is the physical picture of the printed hose with a visual three-dimensional effect prepared in this example.

[0091] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A method for preparing a printed sheet with a visual three-dimensional effect, characterized in that: The steps include: (1) coating a printing substrate surface leveling promoting layer on a blank composite substrate layer to be printed; (2) coating and printing a light-absorbing and reflective high-concentration color layer on the surface of the substrate to promote the leveling layer; (3) Printing high-flow ultra-fine metal texture VE3D coating on the light-absorbing and reflective high-concentration color layer. (4) coating and printing a high-transparency, wear-resistant protective coating on the high-fluidity, ultra-fine metal texture VE3D coating to prepare a printed sheet with a visual three-dimensional effect; The specific steps of step (3) are as follows: The height difference and dot distribution of the three-dimensional pattern to be prepared are processed in advance, and then the processed dots are copied to a special flexible resin plate through digital platemaking technology. Then, the high-fluidity ultra-fine metal texture VE3D coating is lightly pressed through the special flexible resin plate. This VE3D coating is leveled without drying, so that the high-fluidity ultra-fine metal texture VE3D coating is quickly leveled and distributed according to the pattern molded by the surface structure of the special flexible resin plate, and then cured and fixed by ultraviolet rays to form a three-dimensional pattern with a visual three-dimensional effect on the high-fluidity ultra-fine metal texture VE3D coating. The dot production process of the three-dimensional pattern includes the following steps: First, the three-dimensional pattern to be prepared is processed visually, and the position to be visually three-dimensional is identified, screened, rasterized, and the dot ratio value is calculated. After vector distribution, the visual three-dimensional molding file and dot data are obtained; the dot data is copied to a special flexible resin printing plate through computer digital direct engraving technology. During the plate washing process, the initial exposure needs to be adjusted to ensure that the hardness of the plate in different dot areas is within the Shore hardness range of 60 to 70.

2. The method for preparing a printed sheet with a visual three-dimensional effect according to claim 1, characterized in that: The blank composite substrate layer in step (1) is a pure plastic sheet, an aluminum-plastic sheet or an aluminum-plated composite sheet, and the substrate surface leveling promotion layer is prepared from a surface wetting agent.

3. The method for preparing a printed sheet with a visual three-dimensional effect according to claim 1, characterized in that: The light-absorbing reflective high-concentration color layer in step (2) is prepared from a high-color-concentration pigment and a light-absorbing polymer monomer in a mass ratio of 1.5-2.5:8.5-7.5; the high-color-concentration pigment is an azo organic polymer, and the light-absorbing polymer monomer is an aromatic ketone polymer.

4. The method for preparing a printed sheet with a visual three-dimensional effect according to claim 1, characterized in that: The intensity of the initial exposure in step (3) is 700-900 W / cm 2 , the time is 350 to 400 seconds.

5. The method for preparing a printed sheet with a visual three-dimensional effect according to claim 1, characterized in that: The high-fluidity ultra-fine metal texture VE3D coating processing and manufacturing process described in step (3) includes the following steps: a. Prepare polyester acrylate oligomer, trimethylolpropane tetraacrylate, modified polyurethane acrylate oligomer and tin oxide crystal in a mass percentage of 12-22:8-12:45-65:10-15; b. Grind indium oxide crystals at low temperature until the average particle size is less than 20u, and then mix and stir with polyester acrylate oligomer, trimethylolpropane tetraacrylate and modified polyurethane acrylate oligomer; prepare high-fluidity ultra-fine metal texture VE3D coating paint.

6. The method for preparing a printed sheet with a visual three-dimensional effect according to claim 1, characterized in that: The high-fluidity ultrafine metal texture VE3D coating described in step (3) is prepared from ultrafine metal particles and low molecular weight polyester acrylic oligomers in a mass ratio of 1:

9.

7. The method for preparing a printed sheet with a visual three-dimensional effect according to claim 1, characterized in that: The size of the ultrafine metal particles is 10 to 20u, and the low molecular weight polyester acrylic oligomer is neopentyl glycol polymethyl ethylene oxide diacrylate.

8. The method for preparing a printed sheet with a visual three-dimensional effect according to claim 1, characterized in that: The high-transmittance wear-resistant protective coating in step (4) is prepared from a permeability-enhancing leveling agent and a high-transmittance and highly dispersible anti-wear agent in a mass ratio of 65-75:35-25; the permeability-enhancing leveling agent is 2-propylene glycol monoester, and the high-transmittance and highly dispersible anti-wear agent is isomeric polydimethylsiloxane.

9. A printed sheet with a visual three-dimensional effect prepared by the preparation method according to any one of claims 1 to 8, characterized in that: From the inside to the outside, it includes a blank composite substrate layer, a substrate surface leveling promotion layer, a light-absorbing and reflecting high-concentration color layer, a high-fluidity ultra-fine metal texture VE3D coating and a high-transmittance wear-resistant protective coating; the substrate surface leveling promotion layer is coated and printed on the blank composite substrate layer, the light-absorbing and reflecting high-concentration color layer is coated and printed on the substrate surface leveling promotion layer, the high-fluidity ultra-fine metal texture VE3D coating is coated and printed on the light-absorbing and reflecting high-concentration color layer, and the high-transmittance wear-resistant protective coating is coated and printed on the high-fluidity ultra-fine metal texture VE3D coating.

10. A hose with a visual three-dimensional effect, comprising a hose head and a hose body, characterized in that: The tube body is prepared from the printed sheet with visual three-dimensional effect as described in claim 9.

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