Method for inhibiting visual angle chromatic aberration of excimer solid color skin-touch paint

Abstract

The invention discloses a method for inhibiting visual angle chromatic aberration of excimer solid color skin-touch paint, and relates to the technical field related to coating implementation processes, and the method comprises the following steps: firstly, feeding a same-color melamine plate to a production line, carrying out sanding chamfering and light polishing treatment on the plate, and then removing dust on the surface of the plate; then 8-10 g / m of UV adhesive force primer is coated in a roller mode, and two mercury lamps are adopted for ultraviolet semi-curing; then, 5-30 g / m of UV excimer solid color skin feeling paint is coated in a roller mode, the paint liquid forms microgel through gallium lamp precuring, excimer curing is conducted on the basis, and then two gallium lamps and two mercury lamps are used for completing paint full curing; and finally, carrying out online detection on the board surface, checking defects such as bubbles and particles, marking unqualified boards, pasting a protective film for protection, and then, carrying out offline. According to the invention, through selection of the same-color base material, specific roller coating parameters, segmented pre-curing, nitrogen protection curing and other processes, all-angle chromatic aberration and uniform gloss of the excimer solid-color skin-feeling paint are realized, excellent skin feeling and physical properties are considered, quality and efficiency are improved, and cost is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of coating application processes, specifically a method for suppressing the visual aberration of excimer solid color skin-feel paint. Background Technology

[0002] UV excimer solid color skin-feel paint, with its excellent environmental friendliness, hardness, scratch resistance, and yellowing resistance, while also possessing leveling effect and delicate skin feel comparable to solvent-based polyurethane paint, has become a mainstream material in the high-end decoration field, and market demand for it continues to rise. As consumers upgrade their product quality requirements, high-end application scenarios place stringent demands on the color consistency of the paint film—it must achieve basic uniformity of color and gloss from different viewing angles, with no significant viewing angle difference.

[0003] However, the existing application process of UV excimer solid color skin-feel paint has insurmountable technical bottlenecks, resulting in significant issues with the appearance of different parts of the product, which seriously affects the product's high-end positioning and decorative effect. Significant color and gloss differences when viewed from high angles: Paint films produced using traditional processes will show regular stripe-like differences in color and gloss when viewed from a height of 85 degrees. This problem can be clearly detected by multi-angle colorimeter and gloss meter. Although it is difficult for non-professionals to notice, it directly damages the quality image of high-end products. Significant color differences from multiple angles: The paint film color varies significantly when viewed from different angles. This is a common problem in engineering interfaces, and existing technologies cannot effectively improve it. As a result, the uniformity of product decoration is insufficient, making it difficult to meet the aesthetic requirements of high-end scenarios. Process compatibility defects: Existing processes mostly use LED lamps built into the excimer laser equipment for pre-curing. Differences in power between LED lamp modules and inconsistencies in the light transmittance of the matching glass plates lead to uneven pre-curing, which in turn causes differences in the wrinkle state of the paint film and exacerbates the visual aberration at high angles. At the same time, problems such as the lack of coordination between coating amount control and pre-curing energy, and unreasonable design of roller coating equipment parameters further amplify the visual aberration and gloss differences. Summary of the Invention

[0004] The purpose of this invention is to provide a method for suppressing the color difference of excimer solid color skin-feel paint, which aims to solve the above-mentioned problems. This invention achieves uniform color difference and gloss of excimer solid color skin-feel paint from all angles through processes such as selecting substrates of the same color, specific roller coating parameters, segmented pre-curing, and nitrogen-protected curing, while taking into account excellent skin feel and physical properties, thus improving quality, increasing efficiency and reducing costs.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: A method for suppressing visual aberration in excimer solid color skin-feel paint includes the following steps: Step 1: Load the melamine sheets of the same color onto the production line; Step 2: Sand the edges and corners of the melamine board described in Step 1 and lightly polish it; Step 3: Perform a dust removal process on the surface of the board material after the treatment in Step 2; Step 4: Based on Step 3, apply a UV adhesion primer by roller, with a coating amount of 8-10 g / m². 2 ; Step 5: Based on step 4, use two mercury lamps for ultraviolet curing to partially cure the paint; Step Six: Based on Step Five, apply UV excimer solid color skin-feel paint by roller coating, with a coating amount of 5-30g / m². 2 ; Step 7: Based on Step 6, use a gallium lamp to pre-cure the paint, causing the paint liquid to form a microgel; Step 8: Perform excimer curing on the microgel obtained in Step 7; Step Nine: Based on Step Eight, use two gallium lamps and two mercury lamps for curing to fully cure the paint; Step 10: Conduct preliminary online inspection of the board surface from Step 9 to check for bubbles and particles, and mark unqualified boards. Step 11: Apply a protective film to the boards processed in Step 10 and remove them from the production line.

[0006] Preferably, in step four, the coating roller used for roller coating the UV adhesion primer has a hardness of 35-45 degrees and is a silicone roller. The steel roller of the even distribution roller is reversed, and a doctor blade made of tungsten steel is placed on the steel roller to control the coating amount. The method of reversing the steel roller to adjust the doctor blade can make the roller-coated paint smooth and even, with virtually no roller marks or orange peel, approaching the effect of spraying. This solves the problem of poor paint film smoothness affecting color and local color difference by improving the smoothness of the paint film.

[0007] Preferably, laser rollers are used in step six. The coating roller of the laser roller is made of ternary silicone and has a linear velocity of 75-85. The hardness of the laser roller is 35-45 degrees. The rotation speed of the laser roller coating roller is 10-15 m / min, the rotation speed of the uniform distribution roller steel roller is 1-2 m / min, and the linear velocity is 10-15 m / min. The rotation speed of the coating roller is consistent with the linear velocity. For topcoat application, a 75-85 line count roller is ideal. Too low a line count results in insufficient paint coverage and poor fullness, while too high a line count can cause roller marks, which, although they will eventually level out, will leave laser marks. These laser marks are difficult to detect at angles below 60 degrees, but are easily visible at angles greater than 80 degrees. If using a single roller, the coating roller should be made of silicone with a 45-55 degree hardness, and the leveling roller should be made of steel with a scraper. During application, the steel roller is reversed to adjust the scraper, which controls the coating amount. The hardness of the coating roller is crucial here. A hardness below 45 degrees will result in a slight orange peel effect; a hardness above 55 degrees will easily cause roller skipping and horizontal lines, and uneven coating due to variations in board surface flatness will lead to significant color differences.

[0008] Preferably, the melamine board used is a melamine board of the same color. Using a melamine board of the same color eliminates the need for a UV solid color primer process. When achieving the required color and effect, fewer application steps result in a simpler process, higher production efficiency, lower cost, and lower energy consumption. Furthermore, fewer application steps lead to a lower error rate and more stable quality. More importantly, eliminating the use of a UV solid color primer reduces the impact of the UV primer on microgel formation during the pre-curing process. Because light exhibits wave-particle duality, ultraviolet light is reflected after passing through the topcoat and primer when it encounters the substrate. The reflected ultraviolet light can trigger a secondary curing of the paint. Different UV primers use different photoinitiators, and their absorbed ultraviolet light wavelengths and energies are not entirely the same. This affects the amount of ultraviolet light that can re-enter the topcoat, thus affecting the degree of secondary initiation and making energy control during pre-curing more difficult.

[0009] Preferably, in step four, the UV adhesion primer is Nippon Paint's CU-1654 ultra-yellowing resistant UV roller coating adhesion transparent primer. This adhesion primer exhibits good adhesion on various melamine boards, even without sanding the melamine substrate; it also possesses extremely strong bidirectional adhesion, with good interlayer adhesion to the topcoat, which can help improve the topcoat adhesion. More importantly, it has ultra-yellowing resistance, meaning the paint film will not change color over time; the paint film will not change color due to natural light or lack of light, meaning the paint film has excellent color retention; it can overcome the problem of color difference in the topcoat caused by primer discoloration. It can also overcome the problem of color difference in the paint film of the board due to uneven light exposure during storage and use.

[0010] Preferably, in step seven, during the gallium lamp pre-curing stage, a segmented energy gradient control is adopted. The initial energy is 60% of the target energy, lasting 0.8s, and the subsequent energy is 140% of the target energy, lasting 0.5s. Simultaneously, a humidity control system is added to the pre-curing equipment to stabilize the ambient humidity at 45%-55% RH, and a narrow-band electronic light source gallium lamp with a wavelength of 365nm±5nm is selected. If the curing energy is too high, the next excimer curing process will not produce a skin-feel coating film; if the energy is too low, the matte coating film obtained in the next excimer curing process can suppress visual aberration, but the skin-feel effect and texture will be poor.

[0011] Preferably, in step eight, a nitrogen-protected excimer curing process is used, with a nitrogen pressure of 1.2-1.4 MPa in the front stage and 1.6-1.8 MPa in the rear stage, a nitrogen purity of ≥99.995%, and the temperature inside the curing chamber controlled at 23±2℃.

[0012] Preferably, in step six, before roller coating with UV excimer solid color skin-feel paint, the surface of the coating roller is subjected to plasma activation treatment. The power of the low-temperature plasma surface treatment equipment is 30-50W, the treatment time is 15-20s, and the activation gas is a mixture of argon and oxygen with a volume ratio of 7:3. During laser roller construction, an infrared online film thickness monitoring instrument is simultaneously turned on to provide real-time feedback of film thickness data with an accuracy of ±0.1g / m². The pressure range of the uniform roller scraper is automatically adjusted to 0.3-0.8MPa through the PLC control system.

[0013] Preferably, in step eleven, the fully cured board is subjected to low-temperature infrared color uniform treatment at a temperature of 60-70°C for 3-5 minutes. After treatment, it is allowed to cool naturally to room temperature before applying the protective film.

[0014] The method for suppressing visual aberration in excimer solid color skin-feel paint of the present invention has the following beneficial effects: The present invention provides a method for suppressing visual color difference in excimer solid color skin-feel paint. It uses melamine board of the same color as the UV excimer solid color skin-feel paint, thus eliminating the need for additional roller coating of UV solid color primer, simplifying the process, improving production efficiency, and reducing costs and energy consumption. It also avoids the absorption of ultraviolet light by photoinitiators in UV primer, reducing interference with the formation of microgels in the pre-curing stage, reducing the difficulty of pre-curing energy control, and ensuring color consistency in subsequent processes. This invention discloses a method for suppressing visual color difference in excimer solid color skin-feel paint. It involves roller coating 8-10 g / m² of Nippon Paint CU-1654 ultra-yellowing UV-resistant transparent primer with excellent adhesion. The coating roller is a 35-45 degree silicone roller, and the even distribution roller is a reverse-rotating steel roller equipped with a tungsten carbide scraper. This results in extremely strong primer adhesion, allowing for firm adhesion to the substrate without sanding, and a tight bond between the primer and topcoat layers, enhancing overall paint film stability. Ultra-yellowing resistance ensures long-term color retention, preventing color differences caused by light exposure or time during storage or use. The scraper controls the coating amount, and the combined use of a silicone roller with specific hardness ensures extremely high primer smoothness, free of roller marks and orange peel texture. This prevents uneven topcoat application and varying hiding power due to uneven primer, eliminating blooming and laying the foundation for uniform topcoat color. This invention provides a method for suppressing the visual color difference of excimer solid color skin-feel paint. Plasma activation increases the surface tension of the coating roller by more than 30%, raising the paint transfer rate from 85% to 98%, solving the problems of thin coating with low coating weight and oil accumulation and edge shrinkage with high coating weight. Specific parameter laser rollers avoid roller marks and laser marks, ensuring the smoothness of the topcoat. Real-time feedback and automatic pressure adjustment of film thickness enable precise control of coating amount, avoiding color and gloss differences caused by uneven coating, and providing a stable foundation for pre-curing energy matching. This invention provides a method for suppressing color difference in excimer solid color skin-feel paint. A narrow-band gallium lamp precisely matches the absorption wavelength of the paint photoinitiator. Segmented energy gradients prevent over-curing of the surface or under-curing of the interior, ensuring uniform microgel formation. Humidity control eliminates interference from ambient moisture during curing, resulting in consistent microgel states and uniform wrinkles during subsequent excimer curing, completely resolving the striped color difference problem at 85 degrees. Microgel uniformity ensures color consistency across different angles, reducing the color difference ΔE between 60 and 85 degrees from 3.55 in traditional processes to 0.98. Segmented pre-curing improves the smoothness of the skin-feel paint film by 40%, providing a feel close to baby's skin, balancing color difference suppression and skin-feel experience. This invention provides a method for suppressing color difference in excimer solid color skin-feel paint. Segmented nitrogen supply reduces the impact of oxygen inhibition, increases the cross-linking degree of the paint film by 25%, and avoids uneven gloss caused by incomplete curing. A stable temperature and pressure environment ensures consistent wrinkle morphology in the paint film, further optimizing color and gloss uniformity. High-purity nitrogen avoids impurity contamination and improves the weather resistance of the paint film. The increased cross-linking degree enhances the scratch resistance of the paint film, and the hardness increases from 3H to 4H, balancing color difference suppression and physical properties. This invention provides a method for suppressing visual aberration in excimer solid color skin-feel paints. By coordinating pre-curing and excimer curing, the paint achieves complete cross-linking, avoiding discoloration and loss of gloss caused by residual uncured components. Thorough curing ensures a stable paint film structure, maintaining consistent color and gloss over long-term use and reducing the risk of visual aberration in the later stages. This invention provides a method for suppressing the visual color difference of excimer solid color skin-feel paint, eliminating microscopic color differences caused by residual curing stress, reducing the gloss difference value at an 85-degree angle from 1.4 degrees to 0.8 degrees; low-temperature treatment does not damage the skin feel and yellowing resistance of the paint film, accelerates the color stability of the paint film, and makes the color of different areas more uniform. The yellowing resistance of the paint film is improved by 50% after treatment, and there is no obvious yellowing after 1000 hours of accelerated aging, thus extending the product's service life. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solution of the present invention, the product of the present invention will be further described in detail below with reference to embodiments.

[0016] It should be noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] A method for suppressing visual aberration in excimer solid color skin-feel paint includes the following steps: Step 1: Load the melamine board of the same color into the production line; select a substrate of the same color that is close to the UV excimer solid color skin-feel paint to reduce the color contrast between the substrate and the topcoat, and avoid color interference from the additional primer. On the one hand, this can eliminate the UV solid color primer process, simplify the process, reduce costs and energy consumption, reduce the probability of construction errors, and improve quality stability; on the other hand, it avoids the photoinitiator in the UV color primer absorbing ultraviolet light, eliminates its interference with the formation of microgels in the subsequent pre-curing stage, reduces the difficulty of pre-curing energy control, and lays the foundation for color consistency in the future.

[0018] Step Two: Sand the melamine board described in Step One, chamfer the edges, and lightly polish it. Sanding removes burrs and impurities from the board surface, chamfering prevents paint buildup caused by sharp edges, and light polishing optimizes the surface flatness, reducing the impact of surface unevenness on paint film coating. This improves the cleanliness and flatness of the board surface, ensuring uniform application of primer and topcoat, avoiding local color differences caused by surface defects, and providing a smooth base for dust removal in Step Three and roller coating of primer in Step Four, reducing the occurrence of roller marks and orange peel effect in the paint film.

[0019] Step 3: Perform a dust removal process on the surface of the board after Step 2; remove dust and debris from the surface of the board after sanding to prevent impurities from embedding in the paint film and affecting adhesion and smoothness, prevent dust from causing uneven primer coating and reduced adhesion, avoid defects such as particles and pinholes in the paint film, ensure the quality of subsequent coatings, create a clean environment for the roller coating of primer in Step 4, ensure that the primer and the substrate are tightly bonded, and reduce the risk of interlayer peeling.

[0020] Step 4: Based on Step 3, roll-apply a UV adhesion primer at a coverage rate of 8-10 g / m². The coating roller used for this UV adhesion primer has a hardness of 35-45 degrees and is a silicone roller. The UV adhesion primer used is Nippon Paint's CU-1654 ultra-yellowing resistant UV roller-coating adhesion transparent primer. The 35-45 degree silicone coating roller, tungsten carbide doctor blade, and steel roller reversing design allow for precise control of the coating amount via the doctor blade. The elasticity of the silicone roller ensures even primer spread and reduces roller marks. The primer has extremely high smoothness, with no roller marks or orange peel, avoiding uneven topcoat application due to uneven primer and eliminating color blooming. It uses Nippon's Long-Lasting CU-1654 primer, which contains adhesion promoters and anti-yellowing components. It can form strong chemical bonds with the substrate and topcoat and does not absorb ultraviolet light wavelengths that affect curing. Its super anti-yellowing properties ensure long-term color retention of the paint film and avoid color differences caused by light and time during storage or use. This can improve the overall stability of the paint film by improving bidirectional adhesion and provide a reliable base for subsequent topcoat adhesion.

[0021] Step 5: Based on Step 4, use two mercury lamps for ultraviolet curing to semi-cur the paint. The broad-spectrum ultraviolet light emitted by the mercury lamps excites the photoinitiator in the primer, causing partial cross-linking of the primer molecules to form a semi-cured state. This retains the binding activity with the topcoat while avoiding interlayer delamination caused by over-curing of the primer. This allows the primer to initially set, preventing it from being dissolved or washed away during subsequent topcoat application, ensuring a stable coating structure, and providing a smooth and stable base for the topcoat roller coating in Step 6. This ensures uniform topcoat application and reduces sagging and edge shrinkage problems.

[0022] Step Six: Based on Step Five, the coating roller surface is first subjected to plasma activation treatment. The power of the low-temperature plasma surface treatment equipment is 30-50W, and the treatment time is 15-20s. The activation gas is a mixture of argon and oxygen, with a volume ratio of 7:3. The 30-50W energy excites the argon-oxygen mixture to generate high-energy particles, introducing polar groups on the coating roller surface, increasing surface tension and paint adsorption capacity. Plasma activation increases the paint transfer rate from 85% to 98%, solving the problems of thin coating with low coating weight and edge shrinkage with high coating weight. Precise control of film thickness provides a stable foundation for subsequent pre-curing energy matching. During laser roller application, an infrared online film thickness monitor is simultaneously activated to provide real-time film thickness data with an accuracy of ±0.1g / m². The PLC control system automatically adjusts the pressure of the uniform roller scraper to a range of 0.3-0.8MPa. The infrared monitor collects film thickness data in real time, and the PLC system dynamically adjusts the scraper pressure to compensate for coating deviations. Then, a laser roller is used to apply UV excimer solid color skin-feel paint, with a coating amount of 5-30 g / m². The laser roller used is made of ternary silicone and has a line speed of 75-85. The hardness of the laser roller is 35-45 degrees. The rotation speed of the laser roller is 10-15 m / min, the rotation speed of the uniform distribution roller is 1-2 m / min, and the linear speed is 10-15 m / min. The rotation speed and linear speed of the coating roller are consistent. The 75-85 line ternary silicone roller and the matching rotation speed and linear speed ensure uniform transfer of the topcoat, avoid roller marks and laser marks, avoid laser marks visible at high angles, ensure the smoothness of the topcoat, reduce the source of visual aberration, and after the surface polarity of the coating roller is improved, the service life is extended by 20%, reducing equipment maintenance costs.

[0023] Step 7: Based on Step 6, use a gallium lamp to pre-cure the paint and form a microgel. During the gallium lamp pre-curing stage, a segmented energy gradient control is adopted. The first stage energy is 60% of the target energy and lasts for 0.8s, while the second stage energy is 140% of the target energy and lasts for 0.5s. Simultaneously, a humidity control system is added to the pre-curing equipment to stabilize the humidity of the construction environment at 45%-55% RH. The gallium lamps used are narrow-band electronic light sources with a wavelength of 365nm±5nm. The 365nm±5nm narrow-band gallium lamps precisely match the absorption wavelength of the topcoat photoinitiator, and the segmented energy gradient allows the paint to first undergo initial cross-linking before deeper internal curing, forming a uniform microgel. The 45%-55% RH humidity control avoids paint dilution due to high humidity and excessive water loss due to low humidity, ensuring a stable microgel formation environment and uniform microgel state. This results in uniform wrinkles during subsequent excimer curing, completely resolving the 85-degree high-angle stripe color difference problem. Light reflection is balanced at different angles, and the 60-degree or 85-degree angle difference ΔE is significantly reduced. Furthermore, the segmented pre-curing improves the smoothness of the skin-feeling paint film by 40%, achieving a touch close to baby's skin, overcoming the limitation of "color difference suppression and skin feel being mutually exclusive." The narrow-band gallium lamps increase the utilization rate of the photoinitiator by 25%, reducing paint consumption.

[0024] Step 8: Based on the microgel obtained in Step 7, excimer curing is performed. A nitrogen-protected excimer curing process is employed, with a nitrogen pressure of 1.2-1.4 MPa in the initial stage to isolate the film from air and inhibit oxygen polymerization; and a nitrogen pressure of 1.6-1.8 MPa in the subsequent stage to promote cross-linking of the film's molecular chains. Nitrogen purity ≥99.995% avoids impurity interference, and the temperature inside the curing chamber is controlled at 23±2℃ to ensure uniform curing rate. This results in a 25% increase in film cross-linking degree, optimized gloss uniformity, and a reduction of the gloss difference at an 85-degree angle to below 0.8 degrees. The stable environment ensures consistent film wrinkle morphology, further reducing visual aberration. Furthermore, the increased cross-linking degree improves the film's scratch resistance from 3H to 4H and impact resistance by 15%. High-pressure nitrogen accelerates curing, shortening the excimer curing time by 10%-15% and improving production efficiency.

[0025] Step Nine: Based on Step Eight, two gallium lamps and two mercury lamps are used for curing to fully cure the paint. The gallium lamps and mercury lamps work together to emit ultraviolet light of different wavelengths, which fully covers the incompletely cross-linked molecular chains of the topcoat, promotes the complete curing of the paint, and forms a stable paint film structure. This can avoid residual uncured components that may cause discoloration or loss of gloss in the later stages, ensure the stability of color and gloss of the paint film during long-term use, reduce the risk of visual aberration in the later stages, enhance the physical properties of the paint film, and provide a structurally stable paint film substrate for subsequent testing and color uniformity treatment.

[0026] Step 10: Conduct preliminary online inspection of the board surface from Step 9 to check for bubbles and particles, and mark unqualified boards. Use visual inspection or simple instruments to check for surface defects such as bubbles and particles, and mark unqualified products in a timely manner to avoid them flowing into subsequent processes and causing waste. Select qualified boards to ensure the quality of the final product, reduce the problem of poor decorative effect caused by surface defects, and provide a defect-free paint film surface for the color uniform treatment and film application in Step 11, so as to avoid defects affecting the color uniformity effect and the adhesion of the protective film.

[0027] Step 11: Perform low-temperature infrared color homogenization treatment on the boards treated in Step 10. The treatment temperature is 60-70℃, and the treatment time is 3-5 minutes. After treatment, allow them to cool naturally to room temperature before applying a protective film and removing them from the production line. The 60-70℃ low-temperature infrared radiation gently releases residual curing stress, accelerates the uniform diffusion of pigment molecules, eliminates microscopic color differences, further reduces the gloss difference value at the 85-degree angle, accelerates color stabilization, and makes the color more uniform in different areas. The low-temperature treatment improves the yellowing resistance of the paint film by 50%, and there is no obvious yellowing after 1000 hours of accelerated aging. The surface tension of the paint film is uniform, and the adhesion of the protective film is improved by 30%, avoiding scratches during transportation. Natural cooling avoids uneven shrinkage of the paint film. The film isolates external dust and friction, protecting the surface condition of the paint film.

[0028] In this invention, to achieve the function of suppressing visual aberration, the LED lights built into the excimer laser equipment cannot be used for pre-curing; instead, gallium lamps from other UV curing machines must be used. In existing processes, the LED lights built into the excimer laser curing equipment are used for pre-curing. The paint film produced by this process shows significant visual aberration differences when viewed from a high angle, but technicians rarely consider that this is caused by pre-curing. Technical analysis often considers uneven sanding of the primer, uneven roller coating of the topcoat, or even technical problems with the coating itself. However, adjusting the process parameters in these three directions fails to solve the visual aberration problem. Because when using the LED lights built into the excimer laser equipment for pre-curing during the application of excimer skin-feel clear varnish, the paint film effect is excellent, with no color difference issues. Therefore, it is difficult to imagine that the LED lights provided with the equipment would be unsuitable for excimer solid-color skin-feel paint, and it is also difficult to abandon parts of the entire equipment and add other equipment for collaborative operation. The reason why excimer solid color skin-feel paint cannot use LED lights for pre-curing is that LED tubes are modular, with each module consisting of the same number of LED beads. Glass is installed below the LED beads within each module to protect them. There are very slight differences in power between LED tube modules; different power means different energy levels. During pre-curing, the difference in energy absorbed by the paint leads to differences in the degree of pre-curing. The light absorption coefficient and transmittance of the glass plates protecting the LED beads under each module also have slight differences. Different transmittance results in different amounts of energy being exposed and received by the topcoat. The difference in energy absorbed by the paint during pre-curing leads to differences in the degree of pre-curing, resulting in differences in the microgel state of the paint liquid. Different microgel states result in different wrinkles formed in the paint film during excimer curing, leading to differences in gloss and film condition. This difference is relatively slight and difficult to detect when observed and tested at angles of 60 degrees or lower. However, at angles of 85 degrees or higher, differences in gloss and color will appear. The color and gloss differences are distributed in a regular stripe pattern, with a width roughly equivalent to the length of the LED module, arranged perpendicular to the transmission band. This invention, however, does not use the LEDs integrated into the excimer laser device, but instead uses gallium lamps from other UV curing equipment for pre-curing. The gallium lamp tube is a single unit, without regional or module divisions, resulting in uniform energy distribution throughout the tube, and consistent pre-curing and microgel states. There is no additional glass plate outside the gallium lamp tube, so the uniformity of energy is not affected by the transparency of the glass plate. The energy is uniform, and the pre-curing and microgel states are consistent. The microgel state is consistent, the wrinkles formed during excimer laser curing are consistent, and the resulting coating film has a consistent state and gloss. This coating film can be observed and tested from any angle; within the same angle, there are no color differences or gloss variations. This achieves visual aberration suppression.To better achieve visual aberration suppression, gallium lamps with electronic light sources are preferable. Electronic light sources allow for adjustment of the various energy levels required during pre-curing.

[0029] In this invention, the energy control of the gallium lamp during pre-curing is crucial for suppressing visual aberration at different angles. Excessive energy leads to over-curing, resulting in a very smooth excimer film with a good skin-like feel, but it fails to suppress visual aberration at different angles. Conversely, excessively high energy results in severe over-curing, causing the microgel to directly transform into a solid paint film. Once a solid paint film forms, the excimer curing stage becomes ineffective, preventing the formation of a matte or high-gloss paint film. When appropriate gallium lamp energy is used for pre-curing, the resulting paint microgel is in a suitable state, allowing for the formation of ideal large wrinkles during excimer curing. The selection and use of gallium lamp energy are related to the paint film thickness and the color of the excimer skin-like paint. For the same excimer skin-like paint, a thicker film requires higher energy, while a thinner film requires relatively lower energy. Different colors of excimer skin-like paint require different gallium lamp pre-curing energies; generally, darker colors require higher energy, and lighter colors require relatively lower energy. At this point, an electronic controller is needed to precisely adjust the output power of the gallium lamp to ensure that the pre-curing energy allows the paint to form appropriate microgels. The resulting paint film wrinkle interface, with appropriate microgels and film thickness, is randomly distributed at various angles. According to the law of reflection, light of the same wavelength reflects at a fixed angle on the interface of the same homogeneous medium. Different wavelengths of light reflect at different angles, resulting in different colors when viewed from different angles on the same plane. This visual aberration suppression system process forms countless microscopic irregular wrinkles on the macroscopic plane, thus obtaining wrinkled interfaces with various angle distributions at the microscopic level.

[0030] In this invention, countless microscopic planes are randomly distributed at various angles on the same plane. When light of a certain wavelength is incident on the plane, it is actually incident on countless different microscopic planes because these microscopic planes are distributed at various angles. Therefore, light of a certain wavelength can be reflected at various angles on the microscopic plane. Thus, light of a certain color can be seen at various angles. This makes the colors at different angles similar, thereby reducing the difference in visual aberration and gloss at different angles. The light reflection angle on the macroscopic interface is changed by the microscopic interface, and the diffuse reflection on each microscopic interface and the macroscopic interface is superimposed. This can be used to improve and solve the problems of visual aberration and gloss difference at various angles on the macroscopic interface. In step seven of this invention, the gallium lamp pre-cures the paint to form a microgel, which, combined with the excimer curing in step eight, forms an excimer full-matte paint film, thus obtaining the above microscopic interface. The gallium lamp energy selection in step seven of this invention is affected by the coating amount in step six. The energy in step seven needs to be appropriately improved and adjusted according to the coating amount in step six. Step six of this invention significantly affects the overall smoothness of the paint film, and an appropriate application method needs to be selected based on the coating amount in step six. When the coating amount is 5-12 g / cm³... 2 When applicable, it is suitable for single-roller application, with a coating amount of 10 g / cm³. 2 At this stage, the paint film has the best smoothness and the resulting skin-feel is the best. This process requires a coating weight of less than 10g / cm². 2 The hand feel is poor, and the lower the coating weight, the worse the hand feel. When the coating weight is greater than 10 g / m², roller marks are more obvious, which also affects the hand feel; at this point, the higher the coating weight, the worse the hand feel. When the coating weight is 15-30 g / cm²... 2 This method is suitable for both laser roller coating and one-adhesive-one-laser roller coating applications. The optimal coating weight for both processes is 23-28 g / cm³. 2 High coating weight poses a risk of paint stacking, and a high coating weight also increases the difficulty of adjusting gallium lamp energy during the pre-curing stage of microgel formation. Low energy results in insufficient microgel formation, leading to larger and deeper wrinkles during excimer curing, resulting in a poor feel to the finished paint film. High energy combined with a high coating weight results in a relatively low oxygen inhibition effect, making it easy to over-gel the surface and producing a paint film with a high gloss. Low coating weight, on the other hand, poses a risk of laser printing and results in a relatively poor feel and fullness.

[0031] In this invention, the coating amount of the UV excimer solid color skin-feel paint varies, and the energy required for pre-curing also varies. The shrinkage stress during the formation of the excimer film in the excimer curing stage is released against the microgel, and different microgel thicknesses result in different wrinkles. The coating amount, gallium lamp pre-curing energy, and paint film surface effect created by this invention are shown in the table below: <![CDATA[70mJ / cm 2 ]]> <![CDATA[90mJ / cm 2 ]]> <![CDATA[110mJ / cm 2 ]]> <![CDATA[130mJ / cm 2 ]]> <![CDATA[5-10g / m 2 ]]> High angles negate character differences, and subtle color variations at different angles result in a good skin feel. High angles negate differences in character appearance; extremely slight color variations exist between different angles; skin texture appears excellent. High angles negate character differences, and there are only very slight color variations between different angles, resulting in a great skin feel. High angles negate character differences; extremely slight color variations across different angles; excellent skin feel. <![CDATA[15-20g / m 2 ]]> High angles ignore character differences; extremely slight color differences at different angles; matte finish; poor feel. High angles negate character differences; extremely slight color variations exist from different angles; skin texture and feel are average. High angles negate character differences; slight color variations exist from different angles; skin texture is good, but the feel is average. High angles negate the difference in appearance; extremely slight color difference between different angles; high gloss, no skin-like feel, average texture. <![CDATA[25-20g / m 2 ]]> High angles ignore character differences; extremely slight color differences at different angles; matte finish; poor feel. High angles negate character differences; extremely slight color variations across different angles; excellent skin-feel effect. High angles negate differences in character appearance; slight color variations exist from different angles; skin texture appears excellent. High angles negate color differences; extremely slight color variations from different angles; high gloss, non-skin-like feel, and pleasant to the touch. In this invention, the roller coater used in the color difference suppression system for applying the adhesion primer has a coating roller made of 35-45 degree silicone roller, and a uniform roller made of steel roller with a tungsten carbide scraper. The coating amount is controlled by the scraper scraping the steel roller. This method of application results in extremely high smoothness of the roller-coated adhesion primer, approaching the smoothness of laser roller coating or forward / reverse roller coating. High smoothness of the primer will not affect the smoothness of the topcoat, nor will it negatively impact the feel of the topcoat. Furthermore, uneven primer will not cause microscopic inconsistencies in the topcoat's microscopic coating amount, thus avoiding color variations caused by differences in hiding power. Simultaneously, because the coating amount is controlled by the scraper, it eliminates the need for forcefully squeezing the rubber roller and steel roller to control the coating amount, extending the service life of the rubber roller. Similarly, when using a single roller for coating, the coating roller is made of silicone rubber with a temperature of 45 to 55 degrees, and the leveling roller is made of steel with a scraper. During application, the steel roller is reversed to adjust the scraper, which controls the coating amount. The rotational speed of the coating roller needs to be consistent with the linear speed. The higher the hardness of the coating roller, the smoother the paint film.

[0032] In this invention, the laser roller used in the color difference suppression system for laser roller coating needs to be made of ternary silicone rubber, and the laser roller needs to be 75 to 85 lines long; the hardness of the laser roller is controlled between 35 and 45 degrees. The rotation speed of the laser roller coating is controlled at 12 meters per minute, the rotation speed of the uniform distribution roller steel roller is controlled at 1-2 meters per minute, and the linear speed is controlled at 12 meters per minute. Rollers made of ternary silicone rubber have better oil application and paint transfer rates, and it is less likely to produce stringing during laser roller coating, making it easier to design and control the construction parameters. If other silicone rubber rollers are used, stringing is more likely to occur during laser roller coating, requiring strict control of construction parameters. Laser rollers with 75 to 85 lines long produce a moderate film thickness, and the resulting film does not show laser marks when viewed from a high angle. A low laser roller line count results in more noticeable laser marks and a higher paint coverage, but also makes the front and back ends of the workpiece prone to oil accumulation. Conversely, a high laser roller line count leads to low paint coverage, poor fullness, and difficulty in machine adjustment. The hardness of the laser roller should be between 35 and 45 degrees. During application, the paint in the laser roller grooves can be easily squeezed out and transferred to the corresponding workpiece. Higher roller hardness requires increased pressure from the laser roller on the workpiece; otherwise, it is difficult to evenly transfer all the paint from the laser roller grooves to the workpiece. A higher flatness of the workpiece is also required; otherwise, areas may not be coated or the paint coverage may be insufficient. If the roller is too soft, oil will easily accumulate on the four sides of the workpiece. Matching the linear speed to the coating roller speed avoids paint buildup at the beginning or end and reduces damage caused by friction between the workpiece and the roller. A speed of 12 meters per minute is optimal. Too slow a speed affects application efficiency, while too fast a speed can cause slight roller skipping upon contact with the workpiece, resulting in a small number of laser roller marks on the front end of the workpiece.

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention.

[0034] Example 1 (Coating amount 5-12 g / m²) A method for suppressing visual aberration in excimer solid color skin-feel paint includes the following steps: Step 1: Load the melamine sheets of the same color onto the production line; Step 2: Sand the edges and corners of the melamine board described in Step 1 and lightly polish it; Step 3: Perform a dust removal process on the surface of the board material after the treatment in Step 2; Step 4: Based on Step 3, apply a UV adhesion primer by roller coating at a rate of 8-10 g / m². The coating roller used for roller coating the UV adhesion primer has a hardness of 35-45 degrees and is a silicone roller. The UV adhesion primer used is Nippon Paint's CU-1654 ultra-yellowing resistant UV roller coating transparent primer. Step 5: Based on Step 4, use two mercury lamps for ultraviolet curing to partially cure the paint; Step Six: Based on Step Five, the surface of the coating roller is first subjected to plasma activation treatment. The power of the low-temperature plasma surface treatment equipment is 30W, the treatment time is 15s, and the activation gas is a mixture of argon and oxygen with a volume ratio of 7:3. During laser roller construction, an infrared online film thickness monitor is simultaneously turned on to provide real-time feedback on film thickness data with an accuracy of ±0.1g / m². The pressure range of the uniform roller scraper is automatically adjusted to 0.3-0.8MPa through the PLC control system. Then, a UV excimer solid color skin-feel paint is applied using the laser roller coating roller, with a coating amount of 5-12g / m². The laser roller coating roller is made of ternary silicone and has a line density of 75-85. The hardness of the laser roller is 35-45 degrees. The rotation speed of the laser roller coating roller is 10-15m / min, the rotation speed of the uniform roller steel roller is 1-2m / min, and the linear speed is 10-15m / min. The rotation speed of the coating roller is consistent with the linear speed. Step 7: Based on Step 6, pre-cur the paint with a gallium lamp to form a microgel. During the gallium lamp pre-curing stage, a segmented energy gradient control is adopted. The first stage energy is 60% of the target energy for 0.8s, and the second stage energy is 140% of the target energy for 0.5s. At the same time, a humidity control system is added to the pre-curing equipment to stabilize the humidity of the construction environment at 45%-55% RH. The gallium lamp is a narrow-band electronic light source gallium lamp with a wavelength of 365nm±5nm. Step 8: Perform excimer curing on the microgel obtained in Step 7; use nitrogen-protected excimer curing process, with nitrogen pressure of 1.2MPa in the front stage and 1.6MPa in the back stage, nitrogen purity ≥99.995%, and temperature in the curing chamber controlled at 23±2℃. Step Nine: Based on Step Eight, use two gallium lamps and two mercury lamps for curing to fully cure the paint; Step 10: Conduct preliminary online inspection of the board surface from Step 9 to check for bubbles and particles, and mark unqualified boards. Step 11: Perform low-temperature infrared color uniform treatment on the board material processed in Step 10. The treatment temperature is 60℃ and the treatment time is 3 minutes. After treatment, allow it to cool naturally to room temperature before applying a protective film and removing it from the production line.

[0035] Example 2 (coating amount 15-20 g / m²) A method for suppressing visual aberration in excimer solid color skin-feel paint includes the following steps: Step 1: Load the melamine sheets of the same color onto the production line; Step 2: Sand the edges and corners of the melamine board described in Step 1 and lightly polish it; Step 3: Perform a dust removal process on the surface of the board material after the treatment in Step 2; Step 4: Based on Step 3, apply a UV adhesion primer by roller coating at a rate of 8-10 g / m². The coating roller used for roller coating the UV adhesion primer has a hardness of 35-45 degrees and is a silicone roller. The UV adhesion primer used is Nippon Paint's CU-1654 ultra-yellowing resistant UV roller coating transparent primer. Step 5: Based on Step 4, use two mercury lamps for ultraviolet curing to partially cure the paint; Step Six: Based on Step Five, the surface of the coating roller is first subjected to plasma activation treatment. The power of the low-temperature plasma surface treatment equipment is 40W, the treatment time is 18s, and the activation gas is a mixture of argon and oxygen with a volume ratio of 7:3. During laser roller construction, an infrared online film thickness monitor is simultaneously turned on to provide real-time feedback on film thickness data with an accuracy of ±0.1g / m². The pressure range of the uniform roller scraper is automatically adjusted to 0.3-0.8MPa through the PLC control system. Then, a UV excimer solid color skin-feel paint is applied using a laser roller with a coating amount of 15-20g / m². The coating roller of the laser roller is made of ternary silicone and has a line density of 75-85. The hardness of the laser roller is 35-45 degrees. The rotation speed of the laser roller coating roller is 10-15m / min, the rotation speed of the uniform roller steel roller is 1-2m / min, and the linear speed is 10-15m / min. The rotation speed of the coating roller is consistent with the linear speed. Step 7: Based on Step 6, pre-cur the paint with a gallium lamp to form a microgel. During the gallium lamp pre-curing stage, a segmented energy gradient control is adopted. The first stage energy is 60% of the target energy for 0.8s, and the second stage energy is 140% of the target energy for 0.5s. At the same time, a humidity control system is added to the pre-curing equipment to stabilize the humidity of the construction environment at 45%-55% RH. The gallium lamp is a narrow-band electronic light source gallium lamp with a wavelength of 365nm±5nm. Step 8: Perform excimer curing on the microgel obtained in Step 7; use nitrogen-protected excimer curing process, with nitrogen pressure of 1.3MPa in the front stage and 1.7MPa in the back stage, nitrogen purity ≥99.995%, and temperature in the curing chamber controlled at 23±2℃. Step Nine: Based on Step Eight, use two gallium lamps and two mercury lamps for curing to fully cure the paint; Step 10: Conduct preliminary online inspection of the board surface from Step 9 to check for bubbles and particles, and mark unqualified boards. Step 11: Perform low-temperature infrared color uniform treatment on the board material processed in Step 10. The treatment temperature is 65℃ and the treatment time is 4 minutes. After treatment, allow it to cool naturally to room temperature before applying a protective film and removing it from the production line.

[0036] Example 3 (Coating amount 25-30 g / m²) A method for suppressing visual aberration in excimer solid color skin-feel paint includes the following steps: Step 1: Load the melamine sheets of the same color onto the production line; Step 2: Sand the edges and corners of the melamine board described in Step 1 and lightly polish it; Step 3: Perform a dust removal process on the surface of the board material after the treatment in Step 2; Step 4: Based on Step 3, apply a UV adhesion primer by roller coating at a rate of 8-10 g / m². The coating roller used for roller coating the UV adhesion primer has a hardness of 35-45 degrees and is a silicone roller. The UV adhesion primer used is Nippon Paint's CU-1654 ultra-yellowing resistant UV roller coating transparent primer. Step 5: Based on Step 4, use two mercury lamps for ultraviolet curing to partially cure the paint; Step Six: Based on Step Five, the surface of the coating roller is first subjected to plasma activation treatment. The power of the low-temperature plasma surface treatment equipment is 50W, the treatment time is 20s, and the activation gas is a mixture of argon and oxygen with a volume ratio of 7:3. During laser roller construction, an infrared online film thickness monitor is simultaneously turned on to provide real-time feedback on film thickness data with an accuracy of ±0.1g / m². The pressure range of the uniform roller scraper is automatically adjusted to 0.3-0.8MPa through the PLC control system. Then, a UV excimer solid color skin-feel paint is applied using the laser roller coating roller, with a coating amount of 25-30g / m². The laser roller coating roller is made of ternary silicone and has a line density of 75-85. The hardness of the laser roller is 35-45 degrees. The rotation speed of the laser roller coating roller is 10-15m / min, the rotation speed of the uniform roller steel roller is 1-2m / min, and the linear speed is 10-15m / min. The rotation speed of the coating roller is consistent with the linear speed. Step 7: Based on Step 6, pre-cur the paint with a gallium lamp to form a microgel. During the gallium lamp pre-curing stage, a segmented energy gradient control is adopted. The first stage energy is 60% of the target energy for 0.8s, and the second stage energy is 140% of the target energy for 0.5s. At the same time, a humidity control system is added to the pre-curing equipment to stabilize the humidity of the construction environment at 45%-55% RH. The gallium lamp is a narrow-band electronic light source gallium lamp with a wavelength of 365nm±5nm. Step 8: Perform excimer curing on the microgel obtained in Step 7; use nitrogen-protected excimer curing process, with nitrogen pressure of 1.4MPa in the front stage and 1.8MPa in the back stage, nitrogen purity ≥99.995%, and temperature in the curing chamber controlled at 23±2℃. Step Nine: Based on Step Eight, use two gallium lamps and two mercury lamps for curing to fully cure the paint; Step 10: Conduct preliminary online inspection of the board surface from Step 9 to check for bubbles and particles, and mark unqualified boards. Step 11: Perform low-temperature infrared color uniform treatment on the board material processed in Step 10. The treatment temperature is 70℃ and the treatment time is 5 minutes. After treatment, allow it to cool naturally to room temperature before applying a protective film and removing it from the production line.

[0037] To verify the actual effectiveness of the method for suppressing visual color difference in excimer solid color skin-feel paint of the present invention, parallel comparative tests were conducted with traditional processes on three examples with different coating amounts (Example 1: 5-12 g / m², Example 2: 15-20 g / m², Example 3: 25-30 g / m²). The tests covered core dimensions such as visual observation, quantitative detection of color difference and gloss, material utilization, paint film performance, and production efficiency. All data were accurately collected using professional multi-angle colorimeters, gloss meters, and other equipment. Visual observation results were judged by industry technicians using standardized criteria. Specific test results are shown in the table below. Test parameters Traditional crafts Example 1 (5-12 g / m²) Example 2 (15-20 g / m²) Example 3 (25-30 g / m²) Observe at a 60-degree angle No obvious streak differences, color uniformity is average No roller marks or orange peel effect; uniform color. No laser marks or oil buildup; even and saturated color. No oil buildup or discoloration; even and rich color. Observe at an 85-degree angle The color and gloss exhibit unevenness in a striped pattern, resulting in striped color differences. No streak-like differences, uniform gloss, and no obvious color difference. No obvious differences, uniform gloss, and no color variation. No visual distortion, even gloss, and consistent color throughout the entire area. Comparison observation at 60 and 85 degrees Significant differences in color and gloss The colors and glosses are basically the same, with no obvious contrast. The color and gloss transitions naturally, without any visual breaks. The color and gloss are highly uniform, with no deviation in contrast. 60-degree role difference test ΔE Color difference ΔE = 0.34 between different areas; gloss difference 2.1 degrees between different areas. Color difference ΔE = 0.98 between different areas; gloss difference 0.45 degrees between different areas. Color difference ΔE = 0.95 between different areas; gloss difference 0.42 degrees between different areas. Color difference ΔE = 0.92 between different areas; gloss difference 0.38 degrees between different areas. 85-degree role difference test ΔE Color difference ΔE = 2.54 between different areas; gloss difference 9.2 degrees between different areas. Color difference ΔE = 0.96 between different areas; gloss difference 0.40 degrees between different areas. Color difference ΔE = 0.93 between different areas; gloss difference 0.36 degrees between different areas. Color difference ΔE = 0.90 between different areas; gloss difference 0.32 degrees between different areas. 60 & 85 degree angle color difference test ΔE The difference in angle between 60 and 85 degrees is ΔE = 3.55; the difference in gloss between 60 and 85 degrees is 20.2 degrees. The difference in angle between 60 and 85 degrees is ΔE ≤ 1.0; the difference in gloss between 60 and 85 degrees is 0.78 degrees. The difference in angle between 60 and 85 degrees is ΔE ≤ 0.95; the difference in gloss between 60 and 85 degrees is 0.75 degrees. The difference in angle between 60 and 85 degrees is ΔE ≤ 0.90; the difference in gloss between 60 and 85 degrees is 0.72 degrees. Gloss difference value at an 85-degree angle (degrees) 1.4 0.78 0.75 0.72 Paint transfer rate (%) 85 98 98 98 Increase in cross-linking degree of paint film (%) - 25 25 25 Paint film hardness 3H 4H 4H 4H Improved smoothness of the paint film (%) - 40 40 40 Improved resistance to yellowing (%) - 50 50 50 Construction efficiency improved (%) - 10-15 10-15 10-15 Paint usage savings (%) - 25 25 25 The service life of the coating roller is extended (%) - 20 20 20 Improved film adhesion (%) - 30 30 30 Impact resistance increased by (%) - 15 15 15 Note: "-" indicates that there is no corresponding optimization effect data for traditional processes; the smaller the ΔE value of the color difference test, the better the color consistency. The industry usually regards ΔE≤1.5 as the excellent standard; observation-type items are based on macroscopic visual inspection, while test-type items are based on professional instrument testing such as multi-angle colorimeters, gloss meters, etc.

[0038] As can be seen from the above, the pain point of visual color difference in the traditional process of UV excimer solid color skin-feel paint is solved by four major process innovations: the selection of substrates with the same color, precise roller coating control, segmented pre-curing, and nitrogen protection curing. This creates a full-process color difference suppression system, which completely solves industry problems such as high-angle strip color difference, multi-angle color unevenness, and insufficient process adaptability, and achieves precise uniformity of color and gloss from all angles.

[0039] (a) Achieving leapfrog optimization by viewing role differences 60-degree gloss difference: In the traditional process, ΔE=0.34 in different areas. In Examples 1-3, it was optimized to 0.92-0.98. Although the value is slightly higher than that of a single area in the traditional process, it achieves uniform color throughout the entire area without local deviation. The gloss difference value at a 60-degree angle was reduced from 2.1 degrees to 0.38-0.45 degrees, and the uniformity was improved by more than 80%.

[0040] 85-degree color difference: In traditional processes, the difference in gloss is 9.2 degrees and the difference in gloss is 2.54 in different areas. In Examples 1-3, the difference in ΔE is reduced to 0.90-0.96 and the difference in gloss is only 0.32-0.40 degrees, which completely eliminates the striped color difference and makes the visual effect consistent at high angles.

[0041] Cross-angle comparison: The ΔE value at 60 and 85 degrees is reduced from 3.55 in the traditional process to ≤1.0, and the gloss difference value is reduced from 20.2 degrees to 0.72-0.78 degrees, achieving no obvious contrast in color and gloss at all angles, meeting the stringent requirements of high-end decoration scenarios.

[0042] (II) Improved construction efficiency and material utilization rate The paint transfer rate has jumped from 85% in the traditional process to 98%, and with the 25% increase in photoinitiator utilization in narrow-band gallium lamps, paint loss has been significantly reduced, saving 25% in paint usage.

[0043] Eliminating the UV solid color primer process and using nitrogen-protected curing improves construction efficiency by 10%-15%, while extending the service life of the coating roller by 20% and reducing equipment maintenance costs and energy consumption.

[0044] (III) Comprehensive upgrade of overall coating performance Physical properties: The hardness of the paint film is increased from 3H to 4H, the impact resistance is enhanced by 15%, and the scratch resistance and structural stability are significantly optimized; the adhesion of the protective film is improved by 30%, and the risk of scratches during transportation is reduced.

[0045] Skin feel and weather resistance: The fineness of the skin feel coating is improved by 40%, and the touch is close to that of a baby's skin, breaking through the limitation of "color difference suppression and skin feel cannot be achieved at the same time"; the yellowing resistance is improved by 50%, and there is no obvious yellowing after 1000 hours of accelerated aging, and the color stability is excellent with long-term use.

[0046] (iv) Enhanced process adaptability and stability The PLC control system enables precise film thickness control (accuracy ±0.1g / m²), which can flexibly adapt to different coating amounts of 5-30g / m², and has a high tolerance for construction errors. The collaborative design of the entire process ensures that the differences in color and gloss in different areas are minimal, and the quality stability is greatly improved.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Anyone skilled in the art can readily implement the present invention as shown in the specification and as described above. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention using the disclosed technical content are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still considered part of the present invention.

Claims

1. A method for suppressing visual aberration in excimer solid color skin-feel paint, characterized in that, Includes the following steps: Step 1: Load the melamine sheets of the same color into the production line; Step 2: Sand the edges and corners of the melamine board described in Step 1 and lightly polish it; Step 3: Perform a dust removal process on the surface of the board material after the treatment in Step 2; Step 4: Based on Step 3, apply a UV adhesion primer by roller, with a coating amount of 8-10 g / m². 2 ; Step 5: Based on Step 4, use two mercury lamps for ultraviolet curing to partially cure the paint; Step Six: Based on Step Five, apply UV excimer solid color skin-feel paint by roller coating, with a coating amount of 5-30g / m². 2 ; Step 7: Based on Step 6, use a gallium lamp to pre-cure the paint, causing the paint liquid to form a microgel; Step 8: Perform excimer curing on the microgel obtained in Step 7; Step Nine: Based on Step Eight, use two gallium lamps and two mercury lamps for curing to fully cure the paint; Step 10: Conduct a preliminary online inspection of the board surface from Step 9 to check for bubbles and particles, and mark any substandard boards. Step 11: Apply a protective film to the boards processed in Step 10 and remove them from the production line.

2. The method for suppressing visual aberration in excimer solid color skin-feel paint according to claim 1, characterized in that, In step four, the coating roller used for applying the UV adhesion primer has a hardness of 35-45 degrees and is a silicone roller.

3. The method for suppressing visual aberration in excimer solid color skin-feel paint according to any one of claims 1-2, characterized in that, In step six, laser rollers are used for application. The coating rollers of the laser rollers are made of ternary silicone, and the laser rollers have a line count of 75-85. The hardness of the laser rollers is 35-45 degrees. The laser coating roller has a rotation speed of 10-15 m / min, the uniform distribution roller has a rotation speed of 1-2 m / min, and the linear speed is 10-15 m / min. The rotation speed of the coating roller is the same as the linear speed.

4. The method for suppressing visual aberration in excimer solid color skin-feel paint according to claim 1, characterized in that, The melamine board used is a melamine board of the same color.

5. The method for suppressing visual aberration in excimer solid color skin-feel paint according to claim 1, characterized in that, In step four, the UV adhesion primer used is Nippon Paint's CU-1654 ultra-yellowing resistant UV roller coating adhesion transparent primer.

6. The method for suppressing visual aberration in excimer solid color skin-feel paint according to claim 1, characterized in that, In step seven, during the gallium lamp pre-curing stage, a segmented energy gradient control is adopted. The energy in the first segment is 60% of the target energy and lasts for 0.8s, while the energy in the second segment is 140% of the target energy and lasts for 0.5s. At the same time, a humidity control system is added to the pre-curing equipment to stabilize the humidity of the construction environment at 45%-55% RH, and the gallium lamp is a narrow-band electronic light source gallium lamp with a wavelength of 365nm±5nm.

7. The method for suppressing visual aberration in excimer solid color skin-feel paint according to any one of claims 1-6, characterized in that, In step eight, a nitrogen-protected excimer curing process is adopted, with a nitrogen pressure of 1.2-1.4 MPa in the front stage and 1.6-1.8 MPa in the rear stage. The nitrogen purity is ≥99.995%, and the temperature inside the curing chamber is controlled at 23±2℃.

8. The method for suppressing visual aberration in excimer solid color skin-feel paint according to claim 1, characterized in that, In step six, before roller coating with UV excimer solid color skin-feel paint, the surface of the coating roller is subjected to plasma activation treatment. The power of the low-temperature plasma surface treatment equipment is 30-50W, the treatment time is 15-20s, and the activation gas is a mixture of argon and oxygen with a volume ratio of 7:

3. During laser roller construction, an infrared online film thickness monitoring instrument is simultaneously turned on to provide real-time feedback on film thickness data with an accuracy of ±0.1g / m². The pressure range of the uniform roller scraper is automatically adjusted to 0.3-0.8MPa through the PLC control system.

9. The method for suppressing visual aberration in excimer solid color skin-feel paint according to claim 1, characterized in that, In step eleven, the fully cured board is subjected to low-temperature infrared color uniform treatment at a temperature of 60-70℃ for 3-5 minutes. After treatment, it is allowed to cool naturally to room temperature before applying the protective film.