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

Abstract

The present invention discloses a printing sheet with a visual three-dimensional effect and a preparation method thereof. The preparation method applies a special coating made of a new type of metal powder with different refractive effects to a substrate by printing, and the operation of the next unit can be carried out without waiting. When the coating is not dry, a resin plate with a special dot distribution treatment is used. The pattern height (3 to 6 microns) and hardness (60 to 70 Shore hardness) of the resin plate are processed to replicate the pattern on the plate onto the special coating through appropriate printing 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 arrangement of different refraction levels produces corresponding different light and dark levels visually, and visually produces a three-dimensional relief effect of the corresponding pattern.

Description

Technical Field

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

[0002] Currently, the commonly used lenticular or stereolithography hot stamping films on the market require high design requirements for the photolithographic pattern, high mold production costs, long production cycles, and high machine registration precision. However, this new process is more flexible in terms of substrate requirements, suitable for more demanding applications. Furthermore, the processing materials are readily available, the processing design is relatively simple, and it can be easily implemented with existing machinery and equipment, resulting in a more competitive product cost. Summary of the Invention

[0003] To overcome the shortcomings and disadvantages of the prior art, the primary objective of the present invention is to provide a method for producing printed sheets with a visually 3D effect. This method specifically involves a patterned dot combination design, a special high-flow metallic ink, a special soft resin plate, and a light-touch molding wet-leveling, post-photocuring printing process for use on flexible tubes and sheets. The method employs a special coating made from a novel metal powder with varying refractive effects, which is applied to a substrate via printing, allowing the next unit to be processed without waiting. While the coating is still wet, the pattern on the plate is replicated onto the special coating using a resin plate with a specially designed dot distribution and a pattern height (3-6 microns) and hardness (60-70 Shore A). The different dot distributions create an orderly arrangement of the ink powder, resulting in varying levels of refraction. These orderly arrangements of refraction levels visually produce corresponding shades of light and dark, creating a three-dimensional relief effect. This method combines 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 making the surface of the printed product present a three-dimensional visual effect.

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

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

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

[0007] A method for preparing a printed sheet with a visual three-dimensional effect comprises the following steps:

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

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

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

[0011] (4) coating and printing a high-transparency, wear-resistant protective coating on a high-flow, ultra-fine metal 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] The desired 3D pattern is processed in advance for height differences and dot distribution. The processed dots are then copied onto a special flexible resin plate using digital platemaking technology. The high-flow, ultra-fine metallic VE3D coating is then lightly pressed onto the special flexible resin plate. This VE3D coating undergoes a leveling process before drying, allowing the high-flow, ultra-fine metallic VE3D coating to quickly level and distribute according to the pattern molded onto the surface structure of the special flexible resin plate. The coating is then cured with UV light to create a 3D pattern with a visual 3D effect.

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

[0015] First, the three-dimensional pattern to be prepared is processed for visual three-dimensionalization. The positions to be visually three-dimensionalized are 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 (intensity and time) 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.

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

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

[0018] Preferably, the printing speed of the coating and printing substrate surface leveling promotion layer in step (1) is 40 to 60 m / min, the anilox roller line count is 300 to 400 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.

[0019] Preferably, 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.

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

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

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

[0023] Preferably, the visual three-dimensional processing in step (3) includes the following steps: the dot distribution in the three-dimensional part area adopts a nonlinear step difference to ensure that the ultra-fine metal texture coating quickly passes through and covers between different dot ratios, and the refraction angle of light between different dot ratios is easier to control and has good consistency, ensuring a significant three-dimensional effect.

[0024] Preferably, the high-fluidity ultra-fine metal texture VE3D coating manufacturing process in step (3) comprises the following steps:

[0025] a. Prepare polyester acrylate oligomer, trimethylolpropane tetraacrylate, modified polyurethane acrylate oligomer, and tin oxide crystals in a ratio of 12-22:8-12:45-65:10-15 by mass;

[0026] b. Grinding indium oxide crystals at low temperature to an average particle size of less than 20 μm, and then mixing with polyester acrylate oligomer, trimethylolpropane tetraacrylate and modified polyurethane acrylate oligomer to prepare a high-flowability ultra-fine metallic texture VE3D coating.

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

[0028] Preferably, the mixing and stirring temperature in step b is within 25-35° C., the mixing and stirring time is 60-100 min, and the stirring speed is 1000-1500 rpm.

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

[0030] 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 scraping sample on the sample that meets the whiteness of the standard paper sample of GB / T7974-2002 is greater than 80%, and the reflectivity on the black cardboard with a color density greater than 2 is greater than 60%.

[0031] 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.

[0032] The material used for the high-fluidity ultra-fine metal texture VE3D coating is ultra-fine metal texture paint; the ultra-fine metal texture paint is prepared by ultra-light small molecular weight monomers and high-fluidity modified resins, combined with multiple-grinding nano-level ultra-fine metal powders.

[0033] Preferably, the size of the ultrafine metal particles is 10 to 20 μm, and the low molecular weight polyester acrylic oligomer is neopentyl glycol polymethyl ethylene oxide diacrylate, which is a polymer material capable of achieving low viscosity and high flow rate in the coating.

[0034] Preferably, in step (3), the printing speed of the high-fluidity ultra-fine metallic texture VE3D coating is 40 to 60 m / min, the number of lines of the anilox roller is 200 to 300 LCM, the printing pressure is 0.5 to 1.0 MPa, the first leveling time is 4 to 5 seconds, and the UV curing power is 9000 kW.

[0035] Preferably, the high-transmittance and 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.

[0036] Preferably, the printing speed of the high-transmittance and wear-resistant protective coating in step (4) is 40 to 60 m / min, the line number of the anilox roller 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 is prepared by the method.

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

[0040] Among them, the added substrate surface leveling promotion layer and the light-absorbing and reflective high-concentration color layer can improve the transmittance of light, provide a larger reflection and refraction angle, and ensure a significant three-dimensional effect.

[0041] The technology of the present invention improves the fluidity of the ultra-fine metal texture coating and scientifically calculates the dot distribution of the special flexible resin plate to arrange the optical visual effects in a regular manner, controls the distribution of the optical effects of the pattern during the coating flow process, and achieves a three-dimensional visual presentation.

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

[0043] A hose with a visual three-dimensional effect comprises a hose head and a hose body, wherein the hose body is made of a printed sheet with a visual three-dimensional effect.

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

[0045] This invention belongs to the field of printing technology and involves a pattern dot combination design, special high-flow metallic ink, a special flexible resin plate, and a light-touch molding and leveling followed by light-curing printing for use on flexible tubes and sheets. A special coating made from a new type of metal powder with varying refractive effects is applied to a substrate via printing. Next, while the ultra-fine metallic VE3D coating is still wet, a flexible resin plate with a special dot distribution treatment is used for light-touch molding, replicating the dot pattern on the wet coating. The coating is then allowed to flow and distribute according to the dot distribution for a certain period of time, forming a pattern before being thoroughly cured. The height and hardness of the pattern on the flexible resin plate allow the pattern on the plate to be replicated 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 levels of refraction of light. The orderly arrangement of different refraction levels visually produces corresponding different light and dark levels, visually producing 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 today, the technical solution of the present invention is lower in cost, more tolerant of the requirements of the substrate, and can meet more stringent usage requirements. In addition, the processing technology is relatively simple, and there is no need to wait for drying during the printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a diagram showing the structure 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 The VE3D dot distribution diagram is used as an example. The data is only the optimal solution for the design of the tested sample, and it does not mean that only this data 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 is a blank composite substrate layer, 102 is a substrate surface leveling promotion layer, 103 is a light-absorbing and reflective high-concentration color layer, 104 is a high-flow ultra-fine metal texture VE3D coating, and 105 is a high-transmittance and wear-resistant protective coating. DETAILED DESCRIPTION

[0053] The present invention will be further described in detail below with reference to specific examples, but the embodiments of the present invention are not limited thereto. The materials used in the examples of the present invention can all be purchased commercially.

[0054] Example 1

[0055] A method for preparing a printed sheet with a visual three-dimensional effect comprises the following steps:

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

[0057] (2) coating and printing a light-absorbing and reflective high-concentration color layer on the leveling promotion layer on the surface of the substrate;

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

[0059] (4) coating and printing a high-transparency, wear-resistant protective coating on a high-flow, ultra-fine metal 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] 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. The high-fluidity ultra-fine metal texture VE3D coating is then lightly pressed through the special flexible resin plate. This VE3D coating is then leveled without drying, allowing the high-fluidity ultra-fine metal texture VE3D coating to quickly level and distribute according to the pattern molded by the special flexible resin plate surface structure. It is then cured by ultraviolet light to form a three-dimensional pattern with a visual three-dimensional effect on the high-fluidity ultra-fine metal texture VE3D coating. The molding in this step is fully wet molding, and the UV or hot air power is zero (the fully wet state means that the high-fluidity ultra-fine metal texture VE3D coating is not dried at all, so the UV lamp power is zero);

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

[0063] First, the three-dimensional pattern to be prepared is processed for visual three-dimensionalization. The positions to be visually three-dimensionalized are 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 (intensity and time) 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.

[0064] The blank composite substrate layer in step (1) is a transparent all-plastic sheet, which is made of polyethylene; the substrate surface leveling promoting layer is prepared from a surface wetting agent, which is a silicone polymer. In this step, the printing speed of the substrate surface leveling promoting layer is 40 to 60 meters per minute, the anilox roller line count is 300 to 400 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.

[0065] The light-absorbing, reflective, high-density color layer in step (2) is prepared from a high-density pigment and a light-absorbing polymer monomer in a mass ratio of 1.5:8.5. The high-density pigment is an azo organic polymer, and the light-absorbing polymer monomer is an aromatic ketone polymer. The printing speed for coating and printing the light-absorbing, reflective, high-density color layer in this step is 40-60 m / min, the anilox roller line count 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] The thickness of the special flexible resin plate in step (3) is 1.4 to 1.8 mm. The special flexible resin plate is adjusted to meet different pressure requirements by adjusting different thicknesses, thereby controlling the mold contact area to achieve different effects on the three-dimensional pattern. The intensity of the initial exposure in this step is 700 to 900 W / cm 2 The visual 3D processing includes the following steps: the dot distribution in the 3D area adopts a nonlinear step-difference, ensuring that the ultra-fine metallic texture coating quickly passes through and covers the different dot ratios. The refraction angle of light between the different dot ratios is more easily controlled and consistent, ensuring a clear 3D effect.

[0067] The high-flow, ultra-fine metal texture VE3D coating manufacturing process described in this step includes the following steps:

[0068] a. Prepare polyester acrylate oligomer, trimethylolpropane tetraacrylate, modified polyurethane acrylate oligomer, and tin oxide crystals in a ratio of 20:10:60:10 by mass;

[0069] b. Grinding indium oxide crystals at low temperature to an average particle size of less than 20 μm, and then mixing with polyester acrylate oligomer, trimethylolpropane tetraacrylate and modified polyurethane acrylate oligomer to prepare a high-flowability ultra-fine metallic texture VE3D coating.

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

[0071] Preferably, the viscosity of the high-fluidity ultra-fine metallic 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 scraping sample on the sample that meets the whiteness of the standard paper sample of GB / T7974-2002 is greater than 80%, and the reflectivity on the 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 low 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 to 20 μm.

[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-fluidity 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 and 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] The printing speed of the high-transmittance and wear-resistant protective coating in step (4) is 40 to 60 m / min, the line number of the anilox roller 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.

[0081] like Figure 1 As shown, the printed sheet with a visual 3D effect described in this embodiment includes a blank composite substrate layer, a substrate surface leveling promotion layer, a light-absorbing and reflective high-concentration color layer, a high-flow ultra-fine metal texture VE3D coating, and a high-transmittance and wear-resistant protective coating. Figure 2 The figure shows the printed sheet with a visual three-dimensional effect prepared in this embodiment.

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

[0083] like Figures 3 and 4 The following is a photo of a printed hose with a 3D effect produced in this example. The printed hose with a 3D effect in this example is made from a printed sheet with a 3D effect. The hose production speed is 100-200 tubes / min, the system pressure is 5-7 bar, the hose production power is 10-60%, the welding pressure is 2-3 bar, and the cooling water temperature is 15-25°C.

[0084] Example 2

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

[0086] The principle of the high-flow ultra-fine metal texture VE3D coating described in the present invention is as follows:

[0087] By designing a low-viscosity and high-leveling metallic polymer coating, the metal particles of the coating can flow to the set area as quickly as possible after being compressed. The regularly arranged metal particles with different stacking numbers have different levels of reflection and refraction of light, resulting in the difference between light and dark. At the same time, the light path entering the human eye is different, and the resulting time difference makes the light signal received by the human eye different in strength, creating a visual three-dimensional effect. Before production preparation, according to the required test conditions and the required effect, use a small electric stirrer to stir rapidly at 5000 rpm 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. Figure 5 The figure shows an example of VE3D dot distribution diagram. The data is only the optimal solution for the design of the tested sample, and this data is not the only one that can achieve this effect.

[0088]

[0089] Example 3

[0090] This embodiment is the same as the embodiment 1 in the fully wet state, and the other parameters are the same; the difference is that the high-flow ultra-fine metal texture VE3D coating in this embodiment is a silver layer, and the matching light-absorbing and reflective high-concentration color layer is black, such as Figure 6 Shown is a real picture of the printed hose with a visual three-dimensional effect prepared in this embodiment.

[0091] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection 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 the blank composite substrate layer to be printed; (2) Printing a light-absorbing and reflective high-concentration color layer on the surface of the substrate by coating the leveling promotion layer; (3) Printing high-fluidity ultra-fine metal texture VE3D coating on the light-absorbing and reflective high-concentration color layer, (4) A high-transparency, wear-resistant protective coating is applied and printed on the high-flow, 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 desired 3D pattern is processed in advance for height differences and dot distribution. The processed dots are then copied onto a special flexible resin plate using digital platemaking technology. The high-flow, ultra-fine metallic VE3D coating is then lightly pressed onto the special flexible resin plate. This VE3D coating undergoes a leveling process before drying, allowing the high-flow, ultra-fine metallic VE3D coating to quickly level and distribute according to the pattern molded onto the surface structure of the special flexible resin plate. The coating is then cured with UV light to create a 3D pattern with a visual 3D effect. The dot production process of the three-dimensional pattern includes the following steps: First, the three-dimensional pattern to be prepared is processed for visual three-dimensionalization. The positions to be visually three-dimensionalized are 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 special flexible resin printing plate in different dot areas is within the Shore hardness range of 60-70.

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 promoting layer is prepared by a surface wetting agent.

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

5. The method for preparing a printed sheet with a visual three-dimensional effect according to claim 1, wherein: The high-fluidity ultra-fine metal texture VE3D coating processing and manufacturing process described in step (3) includes the following steps: a. Polyester acrylate oligomer, trimethylolpropane tetraacrylate, modified polyurethane acrylate oligomer, and tin oxide crystals are configured in a mass percentage of 12-22: 8-12: 45-65: 10-15; b. Grinding indium oxide crystals at low temperature to an average particle size of less than 20 μm, and then mixing with polyester acrylate oligomer, trimethylolpropane tetraacrylate and modified polyurethane acrylate oligomer to prepare a high-flowability ultra-fine metallic texture VE3D coating.

6. The method for preparing a printed sheet with a visual three-dimensional effect according to claim 1, wherein: The high-flowability 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.

7. The method for preparing a printed sheet with a visual three-dimensional effect according to claim 6, characterized in that: The size of the ultrafine metal particles is 10-20 μm, 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, wherein: The high-transmittance and 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 reflective high-concentration color layer, a high-fluidity ultra-fine metal texture VE3D coating and a high-transmittance and wear-resistant protective coating; the substrate surface leveling promotion 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 promotion layer, the high-fluidity ultra-fine metal texture VE3D coating is coated and printed on the light-absorbing and reflective high-concentration color layer, and the high-transmittance and 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 claimed in claim 9.

Images