Production process of light high-light-transmittance weather-proof stripe organic board

Abstract

The invention relates to the technical field of layered organic plates, in particular to a production process of a light high-transmittance weather-proof stripe organic plate. The invention aims to solve the problem that the mechanical property and the optical property of the existing stripe organic plate cannot be considered at the same time. The preparation method comprises the following steps: carrying out UV curing on a light honeycomb core material by adopting a compound modified solution of 1, 6-hexanediol diacrylate and trimethylolpropane triacrylate to obtain a modified core material; preparing a component B paste with high thixotropy and a component A liquid with low viscosity; printing the component B into honeycomb holes of the modified core material through precise dispensing by adopting an equidistant-edge reinforced layout; then, the component A is poured, the remaining honeycomb holes are filled, and an epidermal layer is formed; and curing through a multi-stage temperature control process to obtain the striped organic plate. The stripe organic plate prepared by the invention has excellent mechanical properties and optical properties, and is suitable for the fields of high-end building decoration, optical illumination and rail transit.

Description

Technical Field

[0001] This invention relates to the field of layered organic board technology, specifically to a production process for a lightweight, high-transmittance, weather-resistant striped organic board. Background Technology

[0002] Transparent honeycomb panels, represented by polymethyl methacrylate or polycarbonate, have been used in fields such as building skylights and interior partitions due to their combination of high rigidity, lightweight, and thermal and sound insulation properties. However, existing technologies present an irreconcilable contradiction in achieving complex optical effects and maintaining high mechanical properties.

[0003] First, the mechanical properties of honeycomb panels are highly dependent on the interfacial bonding strength between the core material and the skin layer. However, conventional PMMA honeycomb core materials are inert on the surface and have poor adhesion to the cast resin, making them prone to delamination under stress or thermal cycling. Existing technologies often use highly active, high-viscosity interfacial coatings, but this approach can introduce optical defects or cause the honeycomb pores to become blocked due to excessive coating thickness.

[0004] Secondly, achieving a striped effect on honeycomb panels exacerbates the contradiction between high light transmittance and high haze. Achieving a clear transparent-diffusing striped effect on lightweight honeycomb panels is a major challenge in existing technologies. Traditional co-extrusion processes are not suitable for honeycomb structures. If a casting method is used, transparent resin and diffusion resin must be filled into different honeycomb cells. However, the two liquid resins are prone to physical mixing and optical crosstalk during the pouring process, ultimately losing their optical design value. In addition, to achieve a diffusion effect, optical diffusing agents must be added. These additives cause differences in the chemical environment, curing shrinkage rate, and coefficient of thermal expansion between components. During curing and aging, stress concentration is easily generated at the interface, leading to cracking or optical distortion, further affecting the stability of optical performance. Based on the above research on existing technologies, it is clear that existing honeycomb panels cannot achieve good optical performance while maintaining high mechanical strength.

[0005] To address this, a production process for lightweight, high-transmittance, weather-resistant striped organic boards was proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a production process for lightweight, high-transmittance, weather-resistant striped acrylic sheets. This invention uses a modified liquid of 1,6-hexanediol diacrylate and trimethylolpropane triacrylate to UV-cur a lightweight honeycomb core material to obtain a modified core material; prepares a highly thixotropic B-component paste and a low-viscosity A-component liquid; employs an equidistant-edge-reinforced layout, and precisely dispenses the B-component into the honeycomb cells of the modified core material; subsequently, the A-component is injected to fill the remaining honeycomb cells and form a skin layer; and a multi-stage temperature-controlled curing process is used to obtain the striped acrylic sheet. The striped acrylic sheet obtained by this invention possesses excellent mechanical and optical properties, making it suitable for high-end architectural decoration, optical lighting, and rail transportation applications.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a production process for lightweight, high-transmittance, weather-resistant striped acrylic sheets, comprising the following steps: (1) Mold preparation and B component printing: Prepare two pieces of high-polished tempered glass. Place the modified core material flat on the lower glass plate. Using a CNC precision dispensing system, the B component is precisely printed into the designated holes of the modified core material through an equidistant-edge-reinforced placement process. Utilizing the high thixotropy of the paste, it accurately stays in the filled holes without collapsing or flowing. (2) A component infusion: Cover with the upper glass plate and clamp it with a clamp. The mold has only one conventional, single infusion port. Using a conventional single-channel infusion pump, the A component is slowly injected from the infusion port. The A component liquid automatically flows throughout the mold, completely filling all the empty honeycomb holes not occupied by the B component, and forming the upper and lower surfaces. (3) Temperature-controlled curing: The pouring mold is horizontally moved into a programmable temperature-controlled water bath, and striped organic plates are obtained by staged temperature control; the staged temperature control includes gel stage, deep curing stage, annealing stage and programmable temperature-controlled cooling stage; the temperature of the gel stage is 70℃ and the time is 10h; in the deep curing stage, the system temperature is first linearly raised to 90℃ in 1-2h and kept at a constant temperature for 3h; in the annealing stage, the temperature is raised to 120℃ in 1h and kept at a constant temperature for 2h; finally, the system temperature is reduced to 30℃ by programmable temperature-controlled cooling at a cooling rate of 10-15℃ / h.

[0008] Preferably, the equidistant-edge-reinforced placement process of the present invention refers to the dispensing system precisely printing the B component paste into the honeycomb cells at a fixed, uniform interval, while the CNC system increases the filling amount or filling density of the B component in the edge area of ​​the board.

[0009] Preferably, the production of the surface modification liquid includes the following steps: adding 50-65 parts of 1,6-hexanediol diacrylate and 30-45 parts of trimethylolpropane triacrylate to a reaction vessel, stirring at 50-100 rpm, and mixing evenly to obtain a solution; under light-protected conditions, adding 3-5 parts of TPO to the solution, stirring at 50-100 rpm to dissolve; then adding 15-30 parts of ethyl acetate for dilution, stirring evenly, and adjusting the viscosity to 100-300 cps to obtain the surface modification liquid, which is then stored in the dark for later use.

[0010] Preferably, the production of the modified core material includes the following steps: placing the core material in a vacuum drying oven and drying it at 80-90℃ for 4-6 hours to obtain dried raw material; adding the dried raw material to a surface modification liquid and letting it stand for 10-20 minutes; slowly removing it and purging it with high-pressure clean air to remove excess liquid from the honeycomb pores, ensuring that only a uniform micron-level wet film remains on the surface of the core material wall; using high-pressure clean air at 0.2-0.4 MPa, maintaining a nozzle distance of 5-10 cm from the core material surface, and an airflow velocity of 5-10 m / s to obtain the treated core material; and passing the treated core material through a high-pressure mercury lamp under nitrogen protection, with an energy of 1200-1800 mJ / cm². 2 The modified core material is obtained by light curing for 15-25 seconds.

[0011] Preferably, the production of component A includes the following steps: adding 90-96 parts of methyl methacrylate, 2-5 parts of ethylene glycol dimethacrylate, 1.2-2 parts of reactive UVA, and 0.5-1.5 parts of zinc stearate to a reaction vessel, stirring at 100-300 rpm and 20-25°C for 30-60 minutes to obtain a transparent solution; 1-2 hours before the filling operation, adding 0.5-1.5 parts of AIBN to the transparent solution, stirring to dissolve and obtain a mixture, wherein the stirring speed is 50-100 rpm and the stirring time is 10-15 minutes; then degassing under vacuum at room temperature, wherein the vacuum degree is -0.08 MPa to -0.1 MPa and the degassing time is 30-60 minutes to obtain component A, which is stored below 25°C in the dark and used within 4 hours.

[0012] Preferably, the production of component B includes the following steps: In a vacuum planetary mixer, add 80-90 parts of methyl methacrylate, 2-5 parts of ethylene glycol dimethacrylate, 1.2-2 parts of reactive UVA, 0.5-1.5 parts of zinc stearate, and 3-6 parts of optical diffusing agent, and disperse stepwise to obtain a mixed system; wherein the mixture is first stirred at low speed (100-300 rpm) for 10 minutes; then dispersed at high speed (2000-3000 rpm) for 30 minutes; while maintaining high-speed dispersion, slowly add 5-12 parts of hydrophobic fumed silica, and stir and mature for 30-60 minutes after the addition; reduce the speed to 100-200 rpm and add AIBN. 0.5-1.5 parts, stir for 10-15 minutes to obtain the component system; continue stirring in a vacuum planetary mixer with the material tank sealed, start stirring (planetary rotation at low speed, impeller revolution at medium speed), and at the same time turn on the vacuum (-0.08MPa to -0.1MPa), stir for 30-90 minutes to obtain component B, transfer to the pressure storage tank of the dispensing system, seal for later use, store below 25℃ away from light, and use within 4 hours.

[0013] Preferably, when preparing the same striped organic plate, the amount of ethylene glycol dimethacrylate, reactive UVA, and zinc stearate added in component A is the same as the amount of the corresponding components added in component B, so as to avoid optical differences at the A / B interface due to component differences, which would affect the overall performance.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention achieves a high degree of balance and synergistic improvement in mechanical properties; it solves the problem of low tensile strength by forming a rigid-toughness balanced interface layer through modified core material; it optimizes the polymerization network with EGDMA crosslinking agent; it fully releases internal stress through a staged temperature control process; and finally, it optimizes edge stress through edge reinforcement structure design. Compared with the prior art, the overall mechanical properties are significantly improved.

[0015] 2. This invention achieves excellent and long-lasting weather resistance. It employs reactive UVA, chemically bonding it to the PMMA network through a copolymerization reaction to prevent migration and volatilization. Furthermore, this invention provides protection in both component A (skin layer) and component B (core stripes), achieving comprehensive synergistic protection of both the skin and core, preventing single-point failure. Compared to conventional PMMA weather modification that relies on physical addition and is prone to migration and precipitation during long-term use, this invention significantly improves the weather resistance of the striped organic board.

[0016] 3. This invention achieves a superior balance between lightweight design and structural designability. In existing technologies, achieving optical effects often relies on solid casting or heavy glass, resulting in a bulky structure. This invention uses a lightweight honeycomb core material as the basic framework, and through the composite filling of components A and B, achieves low density while ensuring high mechanical strength. Utilizing the high thixotropy of component B and precise dispensing technology, stable optical stripes are successfully constructed within the lightweight structure, solving the problem of balancing lightweight design with complex optical design. This is far superior to solutions that suffer from abnormal density due to structural damage or improper formulation.

[0017] 4. This invention resolves the optical crosstalk contradiction between high-transmittance and high-haze areas. Compared to conventional mixed casting, where transparent and diffusing resins mix, leading to contamination of the transparent area and affecting optical performance, this invention utilizes the highly thixotropic paste of component B and the low-viscosity liquid of component A to achieve physical isolation. Combined with the process of printing B first and then pouring A, the mixing of components is eliminated, ensuring that area A maintains extremely high purity and achieving low haze and high transmittance.

[0018] 5. This invention achieves high-contrast and internally uniform striped bands. In existing technologies, the macroscopic clarity and microscopic uniformity of the stripes are two major challenges. This invention addresses these challenges by adding hydrophobic fumed silica to component B, giving it high thixotropy so that it does not collapse or flow after printing, ensuring clear edges at the A / B interface. Furthermore, the preparation of component B employs a stepwise dispersion process involving low speed, high speed, and aging to fully deagglomerate the optical diffusing agent and silica, ensuring uniform optical diffusion within the B band and eliminating any graininess, resulting in a high-contrast and uniform B band optical effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing the changes in strength retention rate during UV aging resistance of Examples 1, 5-6, and Comparative Examples 10-12. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The core material is selected from optical-grade PMMA transparent honeycomb core material, wherein the honeycomb pore size (distance between opposite sides) is 8-12 mm; the wall thickness is 0.2-0.4 mm; the core material height is 10-15 mm; the reactive UVA is 2-(2'-hydroxy-5'-methacryloyloxyethylphenyl)-2H-benzotriazole, CAS: 96478-09-0; AIBN is azobisisobutyronitrile, CAS: 78-67-1; TPO is diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, CAS: 75980-60-8; the optical diffusing agent is organosilicon microspheres with an average particle size (D50) of 5-10 μm and a refractive index of 1.42-1.46; the hydrophobic fumed silica is dimethylsilyl alkyl silica, CAS: 68611-44-9; all parts in this invention are parts by weight.

[0022] Please see Figure 1 This invention provides a production process for lightweight, high-transmittance, weather-resistant striped acrylic sheets, the technical solution of which is as follows: Example 1 60 parts of 1,6-hexanediol diacrylate and 40 parts of trimethylolpropane triacrylate were added to a reaction vessel and stirred at 80 rpm until homogeneous to obtain a solution. Under light-protected conditions, 4 parts of TPO were added to the solution and stirred at 100 rpm until dissolved. Then, 25 parts of ethyl acetate were added for dilution, stirred until homogeneous, and the viscosity was adjusted to 250 cps to obtain a surface-modified solution, which was then stored in the dark for later use. The core material was placed in a vacuum drying oven and dried at 80℃ for 6 hours to obtain a dried raw material. The dried raw material was added to the surface-modified solution and allowed to stand for 20 minutes. It was then slowly removed and purged with high-pressure clean air to remove excess liquid from the honeycomb pores, ensuring that only a uniform micron-sized wet film remained on the surface of the core material wall. High-pressure clean air of 0.3 MPa was used, with the nozzle 8 cm away from the core material surface and the airflow velocity of 5-10 m / s, to obtain the treated core material. The treated core material was then subjected to nitrogen protection and passed through a high-pressure mercury lamp with an energy of 1500 mJ / cm². 2 The modified core material was obtained by light curing for 20 seconds.

[0023] 95 parts of methyl methacrylate, 4 parts of ethylene glycol dimethacrylate, 1.5 parts of reactive UVA, and 0.8 parts of zinc stearate were added to a reaction vessel and stirred at 200 rpm and 25°C for 50 min to obtain a transparent solution. One hour before the infusion operation, 1 part of AIBN was added to the transparent solution and stirred to dissolve, resulting in a mixture at 80 rpm for 15 min. The mixture was then degassed under vacuum at room temperature for 40 min to obtain component A.

[0024] In a vacuum planetary mixer, 85 parts of methyl methacrylate, 4 parts of ethylene glycol dimethacrylate, 1.5 parts of reactive UVA, 0.8 parts of zinc stearate, and 4 parts of optical diffusing agent were added and dispersed stepwise to obtain a mixed system. First, the mixture was stirred at low speed (200 rpm) for 10 minutes; then, it was dispersed at high speed (2600 rpm) for 30 minutes. While maintaining high-speed dispersion, 8 parts of hydrophobic fumed silica were slowly added, followed by stirring and maturation for 40 minutes. The speed was then reduced to 150 rpm, and 1 part of AIBN was added, followed by stirring for 15 minutes to obtain the component system. The mixture was then stirred in the vacuum planetary mixer with the sealed tank open and the vacuum activated for 60 minutes to obtain component B, which was then transferred to the pressure storage tank of the dispensing system and sealed for later use.

[0025] Prepare two pieces of highly polished tempered glass. Place the modified core material flat on the lower glass plate. Using a CNC precision dispensing system, through an equidistant, edge-reinforced placement process, precisely print component B into the designated holes of the modified core material. Utilizing the high thixotropy of the paste, it accurately remains in the filled holes without collapsing or flowing. Cover with the upper glass plate and clamp it with fixtures. The mold has only one conventional, single injection port. Using a conventional single-channel injection pump, slowly inject component A from the injection port. The liquid component A automatically flows throughout the mold, completely filling all the empty honeycomb holes not occupied by component B, forming the upper and lower skin layers, and simultaneously completing... The entire component B paste is encapsulated to obtain a casting mold; the casting mold is then horizontally moved into a temperature-controlled water bath, and striped organic plates are obtained through staged temperature control; the temperature-controlled curing includes a gel stage, a deep curing stage, an annealing stage, and a temperature-controlled cooling stage; the gel stage has a temperature of 70℃ and a time of 10 hours; in the deep curing stage, the system temperature is first linearly raised to 90℃ within 2 hours and held at that temperature for 3 hours; in the annealing stage, the temperature is first raised to 120℃ within 1 hour and held at that temperature for 2 hours; finally, the system temperature is reduced to 30℃ through temperature-controlled cooling at a rate of 12℃ / h.

[0026] Examples 2-4 follow the same preparation method and parameters as Example 1, with differences shown in Table 1.

[0027] Comparative Example 1: Refer to Example 1, except that optical-grade PMMA transparent honeycomb is used as the core material and no modification treatment is performed.

[0028] Comparative Example 2 is the same as Example 1, except that 100 parts of 1,6-hexanediol diacrylate were used in the surface modification solution, while the other components remained unchanged.

[0029] Comparative Example 3 is the same as Example 1, except that 100 parts of trimethylolpropane triacrylate are used in the surface modification liquid, while the other components remain unchanged.

[0030] Comparative Example 4 is the same as Example 1, except that ethylene glycol dimethacrylate is not added to components A and B.

[0031] Comparative Example 5 is the same as Example 1, except that the temperature-controlled curing process does not include a low-temperature gelation stage, while the other processes remain unchanged.

[0032] Comparative Example 6 is the same as Example 1, except that the temperature-controlled curing process does not include an annealing stage, while the other processes remain unchanged.

[0033] Comparative Example 7 is the same as Example 1, except that the programmed temperature control cooling rate is 20°C / h.

[0034] Comparative Example 8 is the same as Example 1, except that the filling of components A and B is not in accordance with equidistant edge reinforcement, but only in accordance with equidistant regularity.

[0035] Comparative Example 9 is the same as Example 1, except that hydrophobic fumed silica is not added to component B.

[0036] Experimental Example 1: Mechanical Property Testing The striped organic boards prepared in Examples 1-4 and Comparative Examples 1-9 were subjected to mechanical property tests. Bending performance was tested according to GB / T 9341-2008 using the three-point bending method with a span of 64 mm and a loading speed of 2 mm / min. Impact resistance was tested according to GB / T 1043.1-2008. Tensile strength was tested according to GB / T 1456-2005. The test results are shown in Table 2.

[0037] As shown in Table 2, the mechanical properties of the striped organic board obtained in the comparative examples, through adjustments to the components and processes, are significantly reduced compared to the examples. Comparative Example 1 shows that the unmodified PMMA core material has a smooth surface and is chemically inert, lacking effective chemical bonding or physical anchoring with the subsequently infused components A and B. This results in a fragile interface between the core material and the matrix, making it prone to delamination under external forces. Combined with the results of Comparative Examples 2-3, it is evident that 1,6-hexanediol diacrylate exhibits good flexibility but high viscosity and poor permeability. The inability to uniformly cover the honeycomb wall surface results in an incomplete modified layer, leading to insufficient interfacial wetting and reduced mechanical properties. Trimethylolpropane triacrylate has a high crosslinking density and fast reaction rate, but it is also brittle and prone to microcracks. Although the modified film is uniform, its excessive rigidity causes stress concentration on the core material surface, disrupting the balance between flexibility and rigidity, resulting in unstable performance under dynamic loads. Comparative Example 4 shows that the lack of crosslinking agent leads to low polymer network density and insufficient molecular chain entanglement, preventing the formation of a stable crosslinked network structure. Comparative Examples 5-7 show that the temperature-controlled curing process... Strict control of the curing process effectively improves mechanical properties; direct high-temperature curing easily leads to bubbles and uneven prepolymerization. The viscosity increase is controlled through the gelation stage to avoid thermal convection mixing; the slow network formation in the low-temperature stage is disrupted, amplifying the curing shrinkage stress; without an annealing process, there is no stress release after high temperature, resulting in the accumulation of residual thermal stress, which disrupts the continuity of multi-stage temperature control, causing micro-stress concentration and reducing fatigue resistance; and excessively rapid cooling induces thermal stress gradients, producing surface microcracks, disrupting stress relaxation after annealing, and reducing overall mechanical properties; in Comparative Example 8, due to the lack of edge reinforcement layout, the edge of the composite material plate (usually a stress concentration area) has insufficient structural stiffness, resulting in limited overall mechanical properties; edge reinforcement can be achieved by adding component B to the edge area to improve the structural stiffness and anti-delamination ability of the edge; the results of Comparative Example 9 show that hydrophobic fumed silica is the key thixotropic agent of component B. Without the addition of silica, component B will be a low-viscosity liquid that cannot be printed into the designated holes but will flow around, causing components A and B to mix and completely destroying the preset stripe structure.

[0038] In summary, this invention forms a uniform UV-curable microfilm by adjusting the ratio of 1,6-hexanediol diacrylate and trimethylolpropane triacrylate, thereby improving the shear strength of the core-resin interface. Ethylene glycol dimethacrylate is used as a crosslinking bridge to increase polymerization density. Hydrophobic fumed silica ensures that component B has high thixotropy and does not collapse, improving impact resistance and modulus. Equidistant edge reinforcement using CNC dispensing ensures that component B accurately fills the honeycomb pores, and component A is infused to form a complete skin layer, avoiding voids. Multi-stage synergy in the temperature control process improves the overall rigidity-toughness balance. Through the optimization of the dual-monomer ratio of the core material UV-modified liquid, the synergistic crosslinking of components A and B, and the linkage of precision dispensing and multi-stage temperature-controlled curing processes, a flexible-rigid balance, strong interfacial adhesion, and uniform stress are achieved, resulting in an overall effect that not only improves the mechanical properties of the striped organic board but also ensures optical diffusion uniformity and processing stability, making it suitable for high-requirement structural applications.

[0039] Examples 5-7 follow the same preparation method and parameter conditions as Example 1, with differences shown in Table 3.

[0040] Comparative Example 10 is the same as Example 1, except that reactive UVA is not added to components A and B, while the other components remain unchanged.

[0041] Comparative Example 11 is the same as Example 1, except that components A and B are supplemented with conventional UV absorbers and are non-reactive.

[0042] Comparative Example 12 is the same as Example 1, except that reactive UVA is not added to component A, while component B remains unchanged.

[0043] Comparative Example 13 is the same as Example 1, except that reactive UVA is not added to component B, while component A remains unchanged.

[0044] Experiment Example 2 Weather Resistance Test The striped organic boards prepared in Examples 1, 5-7, and Comparative Examples 10-13 were subjected to weathering performance tests. The yellowing index was tested according to GB / T 2408-2008 using a spectrophotometer, with initial values ​​based on the samples before aging. Aging tests were conducted according to GB / T 16422.2-2014, with irradiation for 3000 hours at 0.35 W / (m²·nm)@340nm. Following the test method of Example 1, the flexural strength before and after aging was tested, and the flexural strength retention rate was calculated. The results are shown in Table 4. The changes in the strength retention rate of UV aging resistance in Examples 1, 5-6, and Comparative Examples 10-12 are shown in Table 4. Figure 1 As shown.

[0045] As shown in Table 4, the weather resistance of the striped organic panels obtained in the comparative examples, obtained by adjusting the components and processes, was significantly reduced compared to the examples. In Comparative Example 10, the absence of reactive UVA completely disrupted the photostable system, and the PMMA backbone was directly exposed to UV-induced free radical attacks. Under strong ultraviolet irradiation, the polymer chain still degraded, leading to a sharp decline in mechanical properties and severe yellowing. Combined with Comparative Example 11, conventional UVA (such as benzotriazoles) is physically added rather than chemically bonded. Firstly, during the high-temperature annealing stage, small-molecule conventional UVA is easily volatilized or degraded. Secondly, during long-term use... These substances will slowly migrate and precipitate from the material, leading to a gradual loss of weather resistance. Comparative Examples 12-13 show that component A is used to fill the empty honeycomb pores and form the upper and lower skin layers. The skin layer is the first line of defense against ultraviolet rays. The lack of reactive UVA leads to rapid degradation and yellowing of the board surface under light, resulting in the loss of mechanical properties. Similarly, component A contains reactive UVA, providing good surface protection. However, ultraviolet rays can penetrate the transparent component A and irradiate the internal component B. The lack of UVA leads to severe UV penetration in the internal honeycomb pores, causing yellowing and degradation of the internal stripes, and reducing the overall weather resistance.

[0046] In summary, this invention utilizes reactive UVA in both component A and component B. The reactive UVA contains polymerizable methacrylate functional groups, which copolymerize with methyl methacrylate and ethylene glycol dimethacrylate during curing, permanently bonding to the PMMA polymer network. This prevents migration and precipitation during long-term use and ensures the UVA's resistance to subsequent high-temperature curing without volatilization, guaranteeing long-term and permanent weather protection. Furthermore, the UVA in component A protects the outer layer and transparent honeycomb pores, forming the first line of defense against external ultraviolet radiation. The UVA in component B protects the internal stripe structure, preventing UV penetration and degradation of the entire board. Through precise formulation and polymerization of reactive UVA, uniform vacuum dispersion of fillers in component B, and the integration of precise filling and multi-stage temperature control, a weather-resistant system with bonded shielding, internal buffering, and stress balance is formed, significantly improving overall weather resistance and making it suitable for outdoor optical applications.

[0047] Comparative Example 14 is the same as Example 1, except that the amounts of other additives added to components A and B are different. Component A is supplemented with 2 parts of ethylene glycol dimethacrylate and 2 parts of reactive UVA, while component B remains unchanged.

[0048] Comparative Example 15 is the same as Example 1, except that both components A and B use optical diffusing agents.

[0049] Comparative Example 16 is the same as Example 1, except that component B is prepared by direct mixing without stepwise dispersion.

[0050] Experimental Example 3: Optical Performance The striped organic boards prepared in Examples 1, 5-7, Comparative Examples 9, and Comparative Examples 14-16 were subjected to optical performance tests. The density of the organic boards was tested according to GB / T 1033.1-2008 by immersion method at 25°C. The light transmittance was tested according to GB / T 2410-2020 using a spectrophotometer at an incident angle of 0° and a wavelength of 550nm (visible light region). The striped bands of the finished striped organic boards were observed visually. The test results are shown in Table 5.

[0051] As shown in Table 5, the optical properties of the striped organic board obtained in the comparative examples, through adjustments to the components and processes, are significantly worse than those in the examples. Comparative Example 9 shows that hydrophobic fumed silica is key to the high thixotropy of component B. Without silica, component B is no longer a paste but a low-viscosity liquid similar to component A. When component B is printed into the honeycomb cells, it immediately collapses and flows, failing to settle precisely. When component A is poured in, the two liquids mix severely, resulting in blurred zones and a complete loss of stripe performance. Furthermore, the optical diffusing agent diffuses from area B to area A, causing the originally transparent area A to become cloudy, affecting the overall optical performance of the organic board. Comparative Example 14 shows that although the ratio of component A is still within the range of the examples, it is unbalanced with the ratio of component B. Components A and B are cured separately, and different crosslinking agent and additive contents lead to two different regions... The slight differences in refractive index and curing shrinkage can lead to optical distortion or slight haze at the interface between A and B stripes, reducing the sharpness of the stripe edges. In Comparative Example 15, both components A and B use optical diffusing agents. It can be seen that the organic board has no stripe phenomenon, component A becomes opaque, and the entire board is in a diffused state. The stripe band performance is completely lost. In this case, it is impossible to achieve the stripe effect by forming an optical contrast through the "transparency" of component A and the "diffusion" of component B. The results of Comparative Example 16 show that direct mixing without stepwise dispersion will cause severe agglomeration of the optical diffusing agent and silica in component B, forming visible particles or spots. This results in extremely poor optical uniformity of the B band. However, by using a stepwise dispersion process with low-speed stirring and high-speed dispersion, the optical diffusing agent and fumed silica are completely deagglomerated and uniformly dispersed in the resin, improving the optical performance.

[0052] In summary, component A in this invention is a purely transparent system, free of optical diffusing agents, ensuring extremely high clarity in the light-transmitting areas of the board. Component B is responsible for the optical effects, forming diffusion stripes by adding optical diffusing agents. Furthermore, component B uses a stepwise dispersion process to perfectly disperse hydrophobic fumed silica, constructing a stable three-dimensional network and endowing it with high thixotropy. After printing through a precision dispensing system, it can accurately remain in the filled holes without collapsing or flowing, thus allowing component A to be subsequently infused. The liquid component A can completely fill all empty honeycomb holes not occupied by component B, while not mixing with component B. Utilizing the high thixotropy generated by the hydrophobic fumed silica in component B and the stepwise dispersion process, it perfectly complements the separation process of printing component B first and then infusing component A, thereby ensuring that the transparent component A and the diffused component B are perfectly separated and do not interfere with each other at the microscopic honeycomb hole scale, presenting an extremely clear edge and high-contrast stripe optical effect on a macroscopic scale.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production process of a light weight, high light transmission, weather resistant, striated organic panel, characterized in that, The method comprises the following steps: The modified core material is placed on a glass plate, the B component is printed into the modified core material through an equidistant-edge reinforced layout, and the A component is injected into the infusion mold to obtain a striped organic plate through staged temperature control; wherein the modified core material is obtained by placing the core material in a surface modification liquid, standing, and UV curing; the surface modification liquid is obtained by mixing 1,6-hexanediol diacrylate and trimethylolpropane triacrylate; the A component is obtained by degassing methyl methacrylate, ethylene glycol dimethacrylate, and a reactive UVA; and the B component is obtained by degassing the methyl methacrylate, the ethylene glycol dimethacrylate, the reactive UVA, an optical diffuser, and hydrophobic fumed silica.

2. The production process of a light weight, high light transmission, weather resistant stripy organic board according to claim 1, characterized in that, The production of the surface modification liquid comprises the following steps: the 1,6-hexanediol diacrylate and the trimethylolpropane triacrylate are added to a reaction kettle and uniformly mixed to obtain a dissolved liquid; TPO is added to the dissolved liquid under light-proof conditions, ethyl acetate is added for dilution, and the viscosity is adjusted to obtain the surface modification liquid.

3. The production process of a light weight, high light transmission, weather resistant stripy organic board according to claim 1, characterized in that, The production of the modified core material comprises the following steps: the core material is vacuum dried; the surface modification liquid is added and left to stand; clean air is used for purging to obtain a treated core material; and the treated core material is protected by nitrogen and subjected to UV curing to obtain the modified core material.

4. The production process of a light, high-transmittance, weather-resistant stripy organic board according to claim 1, characterized in that, The production of the A component comprises the following steps: the methyl methacrylate, the ethylene glycol dimethacrylate, the reactive UVA, and zinc stearate are added to a reaction kettle and stirred to obtain a transparent solution; AIBN is added to the transparent solution and stirred to obtain a mixed liquid; and the A component is obtained through vacuum degassing at room temperature.

5. The production process of a light weight, high light transmission, weather resistant stripy organic board according to claim 1, characterized in that, The production of the B component comprises the following steps: the methyl methacrylate, the ethylene glycol dimethacrylate, the reactive UVA, zinc stearate, and the optical diffuser are added to a vacuum planetary mixer and stepwise dispersed to obtain a mixed system; the hydrophobic fumed silica is added and stirred to mature; AIBN is further added and stirred to obtain a component system; and the B component is obtained through vacuum degassing.

6. The production process of a light weight, high light transmission, weather resistant stripy organic board according to claim 1, characterized in that, The production of the infusion mold comprises the following steps: the modified core material is placed on a lower glass plate, the B component is printed into designated holes of the modified core material through the equidistant-edge reinforced layout; an upper glass plate is covered, the A component is injected from an infusion port using a single-channel infusion pump, the honeycomb holes of the modified core material not occupied by the B component are filled, and a skin layer is formed to obtain the infusion mold.

7. The production process of a light weight, high light transmission, weather resistant stripy organic board according to claim 1, characterized in that, The staged temperature control comprises a gelation stage, a deep curing stage, an annealing stage, and a programmed temperature cooling stage.

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