Outer wall decorative plate

Abstract

The utility model provides an outer wall decorating plate which sequentially comprises a light composite plate base layer. A polystyrene foam board layer; a sound-absorbing cotton layer; a polycarbonate layer; one of a clamping groove and a clamping block is arranged on the edge of the outer wall decorative plate, and the clamping groove and the clamping block are matched with each other and are used for splicing and mounting adjacent outer wall decorative plates. According to the technical scheme, the self weight of the outer wall decorating plate is reduced by adopting light materials, so that the bearing load of a building is reduced, the environment-friendly building standard is met, the energy-saving and heat-insulating performance is improved, the energy consumption is reduced, and the installation convenience is optimized. In addition, according to the technical scheme, multiple functions of self-cleaning, sound insulation and the like are achieved, and the using requirements of the building outer wall are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building decoration materials, and specifically relates to an outer wall decorative plate. BACKGROUND

[0002] In the field of modern architecture, as an important material for building facade decoration, the performance and characteristics of the outer wall decorative plate play an important role in improving the overall appearance of the building, protecting the building structure, and meeting different building needs.

[0003] The commonly used outer wall decorative plates include stone, metal, ceramic, and wood. Although the stone decorative plate is beautiful and has good durability, it has a large self-weight, which requires a high bearing capacity of the building structure when used in high-rise buildings, increasing the construction cost and construction difficulty. At the same time, the mining of natural stone causes great damage to the environment, which is not in line with the development concept of green buildings.

[0004] The metal decorative plate has good strength and plasticity, but it has strong thermal conductivity, easily absorbs a large amount of heat in summer and conducts it to the indoor, increasing the air conditioning energy consumption; in winter, it easily causes the loss of indoor heat, which is not conducive to the energy saving and heat preservation of the building. In addition, the metal decorative plate may be oxidized and corroded after long-term exposure to air, affecting its service life and decorative effect.

[0005] The ceramic decorative plate has rich colors and high hardness, but it is brittle in texture and is easy to break during transportation and installation, causing material waste and cost increase. Moreover, the installation of the ceramic decorative plate usually requires the use of a large amount of adhesive, and the construction process is relatively complex, requiring high construction technology.

[0006] The wood decorative plate gives people a natural and warm feeling, but it has poor fireproof and moistureproof performance, is easily affected by insect damage and decay, and needs regular maintenance, which has a high maintenance cost in the later period. In addition, the large use of wood materials is not conducive to the protection of forest resources.

[0007] In addition, with the pursuit of building individualization by people, the existing outer wall decorative plates mostly have single functions and cannot meet the needs of people for the outer wall of the building for functions other than decoration, such as self-cleaning, sound insulation and noise reduction, fireproof and flame-retardant, and ultraviolet resistance. SUMMARY

[0008] This utility model aims to solve many problems associated with existing exterior wall decorative panels. On the one hand, it reduces the self-weight of the decorative panels, thereby reducing the structural load on buildings, making it particularly suitable for high-rise buildings, while also minimizing environmental damage and aligning with green building principles. On the other hand, it improves energy-saving and thermal insulation performance, reducing building energy consumption. Furthermore, it enhances the durability of the decorative panels, extending their service life. It also simplifies transportation and installation processes, reducing material waste and construction costs, and improving construction efficiency. Finally, it endows the decorative panels with multiple functions such as self-cleaning, sound insulation, and UV resistance, reducing later maintenance costs and meeting diverse needs for building exterior walls.

[0009] According to the technical solution of this utility model, an exterior wall decorative panel is provided, comprising, in sequence:

[0010] Lightweight composite board base layer;

[0011] Polystyrene foam board layer;

[0012] Sound-absorbing cotton layer;

[0013] polycarbonate layer; and

[0014] Titanium dioxide coating, in which

[0015] The edge of the exterior wall decorative panel is provided with one of a slot and a block, and the slot and the block cooperate with each other for splicing and installation between adjacent exterior wall decorative panels. Attached Figure Description

[0016] Figure 1 A structural schematic diagram of an exterior wall decorative panel according to a specific embodiment of the present invention is shown; and

[0017] Figure 2 Showing Figure 1 An enlarged diagram of the part marked with a circle C. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. It will be understood that other embodiments may be implemented without departing from the scope or spirit of the present invention. Therefore, the following detailed description is non-limiting.

[0019] Unless otherwise specified, all figures used in this specification and claims to indicate feature dimensions, quantities, and physical properties should be understood to be modified by the term "about" in all cases. Therefore, unless stated to the contrary, the numerical parameters listed in the foregoing specification and appended claims are approximations, and those skilled in the art can appropriately modify these approximations to obtain the desired characteristics using the teachings disclosed herein. The use of numerical ranges indicated by endpoints includes all numbers within that range and any range within that range; for example, 1 to 5 includes 1, 1.1, 1.3, 1.5, 2, 2.75, 3, 3.80, 4, and 5, etc.

[0020] As described above, this utility model aims to solve a series of problems existing in current exterior wall decorative panels. Traditional stone decorative panels are too heavy, increasing construction costs and construction difficulty, and damaging the environment; metal decorative panels have high thermal conductivity, which is not conducive to energy conservation and insulation, and are also prone to oxidation and corrosion; ceramic decorative panels are brittle, easily broken during transportation and installation, and have complex construction; wood decorative panels have poor fire resistance and moisture resistance, high maintenance costs, and are not conducive to resource conservation. At the same time, existing decorative panels have limited functions and cannot meet people's diverse needs for self-cleaning, sound insulation and noise reduction, and UV resistance of building exterior walls. This utility model is dedicated to solving the above problems and improving the overall performance of exterior wall decorative panels.

[0021] Specifically, this utility model provides an exterior wall decorative panel, comprising, in sequence:

[0022] Lightweight composite board base layer;

[0023] Polystyrene foam board layer;

[0024] Sound-absorbing cotton layer;

[0025] polycarbonate layer; and

[0026] Titanium dioxide coating, in which

[0027] The edge of the exterior wall decorative panel is provided with one of a slot and a block, and the slot and the block cooperate with each other for splicing and installation between adjacent exterior wall decorative panels.

[0028] Figure 1 A structural schematic diagram of an exterior wall decorative panel 100 according to a specific embodiment of the present invention is shown, and Figure 2 Showing Figure 1 An enlarged diagram of the part marked with a circle C.

[0029] like Figure 1 and Figure 2As shown, according to a specific embodiment, the exterior wall decorative panel 100 sequentially includes: a lightweight composite board base layer 1; a polystyrene foam board layer 2; a sound-absorbing cotton layer 3; a polycarbonate layer 4; and a titanium dioxide coating 5, wherein the edge of the exterior wall decorative panel 100 is provided with one of a slot 6 and a block 7, the slot 6 and the block 7 cooperating with each other for splicing and installation between adjacent exterior wall decorative panels 100.

[0030] Specifically, the exterior wall decorative panel of this utility model adopts a multi-layer composite structure, comprising, in sequence, a lightweight composite board base layer, a polystyrene foam board layer, a sound-absorbing cotton layer, a polycarbonate layer, and a titanium dioxide coating. This carefully designed structure allows each layer of materials to work synergistically, giving the decorative panel multiple functions. Simultaneously, the grooves and blocks set on the edges of the decorative panel cooperate with each other for splicing and installation between adjacent decorative panels, optimizing the installation process and improving construction efficiency.

[0031] The lightweight composite panel base layer serves as the core supporting structure for exterior wall cladding panels, providing the necessary strength and stability for the entire panel. The thickness of the lightweight composite panel base layer ranges from 10-50mm, and its density is between 0.8-1.5g / cm³. 3 The tensile strength is between 30-100 MPa, and the flexural strength is between 50-150 MPa. These parameter settings ensure that the base layer will not deform or collapse when subjected to its own weight, wind force, rain impact, and other loads, thus guaranteeing the safety and reliability of the exterior wall decoration system.

[0032] In terms of material selection, the base layer of lightweight composite panels can be commercially available fiber-reinforced resin boards, such as the commonly seen SWANCOR fiber-reinforced resin composite board (from SWANCOR New Materials Technology Co., Ltd.). SWANCOR fiber-reinforced resin composite boards are made by reinforcing lightweight resins (such as unsaturated polyester resin and epoxy resin) with high-performance fibers (such as glass fiber and carbon fiber). The fibers are evenly distributed in the resin matrix, effectively improving the strength and rigidity of the board. This material is lightweight and high-strength, greatly reducing the building's self-weight; it has excellent corrosion resistance, allowing it to be used in harsh chemical environments; and it is highly designable, enabling customized production according to different usage requirements. It is commonly used in industrial building exteriors, cleanrooms, and other places with high material performance requirements.

[0033] Polystyrene foam board layers, as thermal insulation layers, play a crucial role in improving the energy-saving and thermal insulation performance of buildings. Their thickness ranges from 20-50mm, and their density ranges from 10-60kg / m³. 3 The thermal conductivity is between 0.02 and 0.03 W / (m·K), and the closed-cell rate is above 95%. This layer can effectively reduce indoor-outdoor heat transfer, reduce indoor heat loss in winter and outdoor heat import in summer, and reduce building energy consumption.

[0034] Polystyrene foam boards are commercially available. Taking extruded polystyrene foam boards as an example, their interior has a tightly connected closed-cell structure. This structure prevents airflow, thus reducing heat conduction. With a closed-cell rate exceeding 95%, heat is even more difficult to transfer through the board, further enhancing thermal insulation. In cold regions, buildings using these exterior wall panels can effectively maintain indoor temperatures in winter, reducing reliance on heating equipment; in hot regions, indoor air conditioning energy consumption in summer is also significantly reduced, achieving building energy-saving goals.

[0035] The sound-absorbing cotton layer, acting as a sound insulation and noise reduction layer, is placed inside the base layer to absorb noise from the outside. This layer is commercially available. Its thickness ranges from 10-15mm, the aspect ratio of the cotton fibers is between 10-20, and the density is between 12-48kg / m³. 3 The average sound absorption coefficient is greater than 0.5 in the frequency range of 100-5000Hz. This frequency range covers common external noise frequencies, such as traffic noise, industrial noise, and residential noise. The working principle of the sound-absorbing cotton layer is to utilize the gaps and friction between cotton fibers to convert the energy of sound waves into heat energy and dissipate it. The reasonable design of the aspect ratio and density of the cotton fibers optimizes the sound absorption effect. For example, in buildings near urban traffic arteries, the use of the exterior wall decorative panels of this utility model can effectively reduce indoor noise, creating a quiet and comfortable living environment for residents; in places with high noise requirements such as schools and hospitals, the presence of the sound-absorbing cotton layer can also reduce external noise interference and ensure normal teaching and medical order.

[0036] The polycarbonate layer is a UV-resistant protective layer. It can be made of polycarbonate (PC), a thermoplastic engineering plastic with excellent comprehensive performance, with a thickness ranging from 5-15mm and a UV transmittance of less than 10%. The benzene rings in the polycarbonate (PC) molecular structure can absorb ultraviolet rays and convert their energy into heat energy for dissipation, thus effectively blocking ultraviolet rays from damaging the internal structure and color of the decorative panel.

[0037] Polycarbonate layers are commercially available, such as those from Covestro's Makrolon series of PC sheets. Makrolon 2805, in particular, boasts excellent optical and mechanical properties, high light transmittance, and while ensuring the aesthetic appeal of the decorative panel, it also protects against UV damage to the internal structure, extending the panel's lifespan. Jiaxing Guleier PC sun panels utilize co-extrusion technology to combine the UV protection layer with the PC sheet. The UV protection layer on the surface has a uniform thickness, effectively absorbing and reflecting UV rays, providing excellent protection and good thermal insulation. Shanghai Huili PC endurance sheets, through a special formula and production process, possess excellent anti-aging properties. When exposed to sunlight for extended periods, they effectively prevent yellowing and embrittlement caused by UV radiation. Furthermore, their sound insulation and surface hardness add advantages to the decorative panels.

[0038] The titanium dioxide coating is a nano-titanium dioxide coating, applied to the outer side of the substrate, with a thickness ranging from 100 to 1000 nm and a particle size ranging from 20 to 30 nm. Its photocatalytic activity, at a light intensity of 500-1000 lux, achieves a decomposition rate of over 80% for organic matter. In natural environments, dust, oil, and other organic matter easily adhere to building exterior surfaces, affecting aesthetics and lifespan. Under ultraviolet irradiation, electrons in the valence band of the nano-titanium dioxide coating are excited and jump to the conduction band, creating holes. These holes react with water adsorbed on the coating surface to generate hydroxyl radicals, while electrons in the conduction band combine with oxygen in the air to form superoxide anions. These two highly reactive substances can oxidize and decompose the organic matter adsorbed on the coating surface into small molecules such as carbon dioxide and water, thus achieving a self-cleaning function.

[0039] In practical applications, when the rainwater runoff rate is 5-10 mm / h, the cleaning efficiency of this exterior wall decorative panel is no less than 90%. This means that under most rainfall conditions, the dirt on the surface of the decorative panel can be effectively cleaned away, reducing the frequency and cost of manual cleaning and maintaining the cleanliness and beauty of the building's exterior walls.

[0040] The slots and clips along the edges of the exterior wall cladding panels are crucial for quick and convenient installation. These slots and clips work together to connect adjacent panels. They can be made of high-strength engineering plastics with a tensile strength of at least 80 MPa; alternatively, they can be made of the same high-performance fiber-reinforced lightweight resin material as the lightweight composite panel base, manufactured using an integrated injection molding process. Using high-strength engineering plastics or the same material as the base layer and integral molding enhances the structural strength and stability of the slots and clips, as well as the overall cladding panel structure. This avoids structural weaknesses caused by material differences and connection issues, improving the overall impact and deformation resistance of the cladding panel. In practical use, even under external impact or building vibration, the connection between the slots and clips remains stable, ensuring the cladding panel will not detach or shift.

[0041] According to certain preferred embodiments of this utility model, the depth of the slot is 15-20mm, the length of the block is 10-15mm, and the overlap between the two after the block is inserted into the slot is not less than 8mm. This size design ensures that the connection strength after splicing meets the requirements of building exterior walls. During the installation of building exterior walls, decorative panels need to withstand various external forces such as wind and gravity. Reasonable slot and block dimensions, as well as sufficient overlap, can ensure sufficient strength at the splice, so that the decorative panels will not affect the use effect and safety due to loosening at the splice during long-term use. For example, in high-rise buildings, the wind force is strong. If the connection strength of the slot and block is insufficient, the decorative panels may sway, fall off, or cause other dangerous situations. The size design of this utility model, after rigorous mechanical calculations and actual testing, can effectively resist these external forces and ensure the safety of building exterior walls.

[0042] According to certain preferred embodiments of this utility model, the fitting accuracy of the slot and the block is controlled within ±0.1mm to ensure that the gaps between adjacent exterior wall decorative panels are uniform and do not exceed 0.5mm after splicing. Strict control of the fitting accuracy not only improves the overall aesthetic effect but also avoids problems such as water leakage and ventilation caused by excessive gaps, enhancing the practicality and protective performance of the decorative panels. During the use of building exterior walls, water leakage may lead to damage to interior decoration and mold growth; ventilation will affect the indoor thermal insulation effect and increase energy consumption. By precisely controlling the fitting accuracy of the slot and the block, these potential problems are effectively solved.

[0043] According to certain preferred embodiments of this utility model, the slots and blocks are designed to interlock, providing at least three positioning points in both the horizontal and vertical directions. Increasing the number of positioning points significantly improves the stability of the decorative panels after installation, ensuring precise positioning of adjacent panels in both the horizontal and vertical directions. This resists the influence of external forces such as wind and building vibrations, guaranteeing the reliability and safety of the exterior wall decoration system. In strong winds, the decorative panels are subjected to significant horizontal wind forces; and buildings themselves experience vibrations during use. The design of multiple positioning points effectively disperses these external forces, preventing displacement and swaying of the decorative panels and ensuring the long-term stable operation of the exterior wall decoration system.

[0044] According to certain preferred embodiments of this utility model, the surfaces of both the slot and the block are micro-roughened, with a surface roughness Ra between 1.6 and 3.2 μm. This treatment increases the friction during splicing, preventing the block from accidentally detaching from the slot even in complex environments such as strong winds and vibrations, thus improving the reliability and stability of the decorative panel splicing. In actual installation and use, the micro-roughened surface increases the friction between the slot and the block, making the connection tighter. Even under significant external forces, the block remains firmly fixed in the slot, preventing detachment and ensuring the quality and safety of the building's exterior wall decoration.

[0045] According to certain preferred embodiments of this utility model, the exterior wall decorative panel may further include a fluorocarbon coating on its surface, the thickness of which is in the range of 20-50 μm. The fluorocarbon coating has excellent corrosion resistance and can effectively resist external erosion, such as acid rain and chemical pollutants. In areas with severe industrial pollution, acidic gases and chemicals in the air can corrode building exterior walls. The presence of the fluorocarbon coating provides a robust protective barrier for the decorative panel, extending its service life. Simultaneously, the fluorocarbon coating also has good weather resistance and self-cleaning properties, maintaining the aesthetic appearance of the decorative panel surface.

[0046] According to certain preferred embodiments of this invention, the dimensional change rate of the exterior wall decorative panel does not exceed 0.2% within a temperature range of -40℃ to 80℃. Under different climatic conditions, building exterior walls experience significant temperature variations. If the dimensional stability of the decorative panel is poor, problems such as cracking and deformation may occur due to thermal expansion and contraction. This invention ensures the dimensional stability of the decorative panel under extreme temperature environments through material selection and structural design. For example, in cold northern regions, winter temperatures can drop below -40℃, while in hot southern regions, summer temperatures can reach above 40℃. The exterior wall decorative panel of this invention maintains dimensional stability under such temperature variations, without affecting its performance or aesthetics.

[0047] According to certain preferred embodiments of this invention, the surface hardness of the decorative panel reaches grade H or higher in the pencil hardness test. This higher surface hardness prevents scratches on the decorative panel surface, maintaining its aesthetic appeal. During construction and daily use, the surface of the decorative panel is easily scratched by various objects, such as tools and branches. Insufficient surface hardness can lead to scratches on the decorative panel surface, affecting its appearance and decorative effect. This invention improves the surface hardness of the decorative panel by optimizing the material formula and production process, giving it good wear resistance and extending its aesthetic lifespan.

[0048] According to certain preferred embodiments of this invention, the nano-titanium dioxide particles in the titanium dioxide coating exhibit good dispersion uniformity, with an agglomeration index of less than 2. Uniform dispersion of nanoparticles improves photocatalytic efficiency and ensures self-cleaning performance. During the preparation of the nano-titanium dioxide coating, severe particle agglomeration reduces the active sites for photocatalytic reactions, thus lowering photocatalytic efficiency. This invention, through the use of advanced dispersion technology and additives, ensures uniform dispersion of nano-titanium dioxide particles in the coating, enabling the coating to fully utilize its self-cleaning function and maintain the cleanliness of the decorative panel surface.

[0049] This utility model of exterior wall decorative panel integrates multiple functions through a multi-layer composite structure and a carefully designed connection structure. Compared with traditional exterior wall decorative panels, it has significant advantages. In terms of weight, the application of a lightweight composite board base layer significantly reduces its self-weight, lowering the load on the building structure, making it particularly suitable for high-rise buildings, while also reducing environmental damage and aligning with green building concepts. Regarding energy-saving and thermal insulation performance, the low thermal conductivity and high closed-cell rate of the polystyrene foam board layer effectively reduce building energy consumption, saving users energy costs. In terms of durability, the synergistic effect of the functional layers and the application of a fluorocarbon coating extend the service life of the decorative panel and reduce replacement costs. In terms of installation and maintenance, the design of the slots and blocks simplifies the transportation and installation process, reduces material waste and construction costs, and improves construction efficiency; the self-cleaning function and high surface hardness reduce subsequent maintenance costs.

[0050] The exterior wall decorative panel according to this utility model can be manufactured according to conventional and known processes in the art. For example, the lightweight composite board base, polystyrene foam board layer, sound-absorbing cotton layer and polycarbonate layer can be bonded together by adhesive and / or pressing (including but not limited to hot pressing). The titanium dioxide coating can be formed on the surface of the polycarbonate layer by conventional processes (including but not limited to spraying, brushing or dipping).

[0051] The following list of embodiments further illustrates various exemplary embodiments of the present invention, which should not be construed as unduly limiting the present invention:

[0052] Specific implementation scheme 1 is an exterior wall decorative panel, characterized in that it comprises, in sequence:

[0053] Lightweight composite board base layer;

[0054] Polystyrene foam board layer;

[0055] Sound-absorbing cotton layer;

[0056] polycarbonate layer; and

[0057] Titanium dioxide coating, in which

[0058] The edge of the exterior wall decorative panel is provided with one of a slot and a block, and the slot and the block cooperate with each other for splicing and installation between adjacent exterior wall decorative panels.

[0059] Specific implementation scheme 2 is the exterior wall decorative panel according to specific implementation scheme 1, characterized in that the lightweight composite panel base layer is a fiber reinforced resin board.

[0060] Specific implementation scheme 3 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the thickness of the lightweight composite panel base layer is in the range of 10-50mm.

[0061] Specific implementation scheme 4 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the density of the lightweight composite panel base layer is 0.8-1.5 g / cm³. 3 Within the range of tensile strength, the tensile strength is in the range of 30-100MPa, and the flexural strength is in the range of 50-150MPa.

[0062] Specific implementation scheme 5 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the thickness of the polystyrene foam board layer is in the range of 20-50mm.

[0063] Specific implementation scheme 6 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the density of the polystyrene foam board layer is 10-60 kg / m³. 3 Within the range.

[0064] Specific implementation scheme 7 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the thickness of the sound-absorbing cotton layer is in the range of 10-15mm.

[0065] Specific implementation scheme 8 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the aspect ratio of the cotton fibers in the sound-absorbing cotton layer is in the range of 10-20.

[0066] Specific implementation scheme 9 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the density of the sound-absorbing cotton layer is 12–48 kg / m³. 3 Within the range.

[0067] Specific implementation scheme 10 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the thickness of the polycarbonate layer is in the range of 5-15mm.

[0068] Specific implementation scheme 11 is the exterior wall decorative panel according to specific implementation scheme 1, characterized in that the titanium dioxide coating is a nano titanium dioxide coating.

[0069] Specific implementation scheme 12 is the exterior wall decorative panel according to specific implementation scheme 1, characterized in that the thickness of the titanium dioxide coating is in the range of 100-1000nm.

[0070] Specific implementation scheme 13 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the particle size of the titanium dioxide particles in the titanium dioxide coating is in the range of 20-30nm.

[0071] Specific implementation scheme 14 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the photocatalytic activity of the titanium dioxide coating is above 80% for the decomposition rate of organic matter when the light intensity is 500-1000 lux.

[0072] Specific implementation scheme 15 is the exterior wall decorative panel according to specific implementation scheme 1, characterized in that the ultraviolet transmittance of the polycarbonate layer is less than 10%.

[0073] Specific implementation scheme 16 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the average sound absorption coefficient of the sound-absorbing cotton layer is greater than 0.5 in the frequency range of 100-5000Hz.

[0074] Specific implementation scheme 17 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the thermal conductivity of the polystyrene foam board layer is in the range of 0.02-0.03 W / (m·K).

[0075] Specific implementation scheme 18 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the exterior wall decorative panel further includes a fluorocarbon coating on its surface.

[0076] Specific implementation scheme 19 is an exterior wall decorative panel according to specific implementation scheme 18, characterized in that the thickness of the fluorocarbon coating is in the range of 20-50μm.

[0077] Specific implementation scheme 20 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the material of the slot and the block is high-strength engineering plastic with a tensile strength of not less than 80MPa.

[0078] Specific implementation scheme 21 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the dimensional change rate of the exterior wall decorative panel does not exceed 0.2% when the temperature range is between -40℃ and 80℃.

[0079] Specific implementation scheme 22 is the exterior wall decorative panel according to specific implementation scheme 1, characterized in that the nano titanium dioxide particles in the titanium dioxide coating have good dispersion uniformity and an agglomeration index of less than 2.

[0080] Specific implementation scheme 23 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the closed-cell rate of the polystyrene foam board layer is above 95%.

[0081] Specific implementation scheme 24 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the surface hardness of the decorative panel reaches level H or above in the pencil hardness test.

[0082] Specific implementation scheme 25 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the self-cleaning function of the exterior wall decorative panel has a cleaning efficiency of not less than 90% when the rainwater scouring rate is 5-10mm / h.

[0083] Specific implementation scheme 26 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the matching accuracy of the slot and the block is controlled within ±0.1mm to ensure that the gap between adjacent exterior wall decorative panels is uniform and does not exceed 0.5mm after splicing, thus ensuring the tightness of the decorative panel installation and the overall aesthetics.

[0084] Specific implementation scheme 27 is based on the exterior wall decorative panel described in specific implementation scheme 1, characterized in that the structure of the slot and the block is designed to be interlocked, and has at least 3 positioning points in both the horizontal and vertical directions, effectively preventing the decorative panel from shifting and shaking after installation.

[0085] Specific implementation scheme 28 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the material of the slot and the block is the same high-performance fiber-reinforced lightweight resin material as the base layer of the lightweight composite panel, and is manufactured by an integrated injection molding process to enhance the structural strength and stability of the slot and the block and the decorative panel as a whole.

[0086] Specific implementation scheme 29 is an exterior wall decorative panel according to specific implementation scheme 1, characterized in that the depth of the slot is 15-20mm, the length of the card block is 10-15mm, and after the card block is inserted into the slot, the overlap between the two is not less than 8mm, so as to ensure that the connection strength after splicing meets the usage requirements of the building exterior wall.

[0087] Specific implementation scheme 30 is the exterior wall decorative panel according to specific implementation scheme 1, characterized in that the surfaces of the slot and the block are both subjected to micro-roughening treatment, with a surface roughness Ra between 1.6-3.2μm, in order to increase the friction during splicing and prevent the block from accidentally coming out of the slot.

[0088] Compared with existing exterior wall decorative panels, the advantages of the exterior wall decorative panel according to this utility model are as follows:

[0089] 1. Reduced self-weight: The use of lightweight composite board base significantly reduces the self-weight of the decorative board, reducing the load on the building structure. It is especially suitable for high-rise buildings and meets green building standards.

[0090] 2. Improved energy-saving and thermal insulation performance: Polystyrene foam board layers can have low thermal conductivity and high closed-cell ratio, effectively reducing indoor and outdoor heat transfer, reducing heat loss in winter and heat transfer in summer, and reducing building energy consumption.

[0091] 3. Sound insulation and noise reduction function: The average sound absorption coefficient of the sound-absorbing cotton layer can be greater than 0.5 in the frequency range of 100-5000Hz, which can effectively absorb external noise and provide a quiet environment for the interior of the building.

[0092] 4. Self-cleaning function: The titanium dioxide coating has photocatalytic activity and can decompose organic dirt under light. When the rainwater flow rate is 5-10 mm / h, the cleaning efficiency is not less than 90%, reducing the cost of manual cleaning.

[0093] 5. UV protection: The UV transmittance of the polycarbonate layer is less than 10%, effectively blocking UV rays from damaging the internal structure and color of the decorative panel and extending its service life.

[0094] 6. Ease of installation: The groove and block design on the edge of the decorative panel ensures high precision, resulting in uniform gaps of no more than 0.5mm after splicing. This makes installation quick and convenient, improving construction efficiency and reducing construction costs.

[0095] 7. Dimensional stability: The exterior wall decorative panels have a dimensional change rate of no more than 0.2% in a temperature range of -40℃ to 80℃, adapting to different climatic conditions and reducing deformation and cracking caused by thermal expansion and contraction.

[0096] 8. Enhanced durability: The optional fluorocarbon coating improves the corrosion resistance of the decorative panels, enabling them to resist external erosion such as acid rain and chemical pollutants, and extending their service life.

[0097] 9. High surface hardness: The surface hardness of the exterior wall decorative panels can be selected to reach level H or above in the pencil hardness test, preventing the surface of the decorative panels from being scratched and maintaining their appearance.

[0098] 10. Multifunctional integration: It integrates multiple functions such as self-cleaning, sound insulation, energy saving and heat preservation, UV resistance and corrosion resistance, to meet the diverse needs of building exterior walls and reduce later maintenance costs.

[0099] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from the spirit and scope of this disclosure. Therefore, if such modifications and variations fall within the scope of the claims of this utility model and their equivalents, this disclosure is also intended to include such modifications and variations.

Claims

1. An exterior wall decorative panel, characterized in that, In order, they include: Lightweight composite board base layer; Polystyrene foam board layer; Sound-absorbing cotton layer; Polycarbonate layer; and Titanium dioxide coating, in which The edge of the exterior wall decorative panel is provided with one of a slot and a block, and the slot and the block cooperate with each other for splicing and installation between adjacent exterior wall decorative panels.

2. The exterior wall decorative panel according to claim 1, characterized in that: The lightweight composite board base layer is a fiber-reinforced resin board; and / or The thickness of the lightweight composite board base layer is in the range of 10-50mm.

3. The exterior wall decorative panel according to claim 1, characterized in that, The density of the lightweight composite board base layer is 0.8-1.5 g / cm³. 3 Within the range of tensile strength, the tensile strength is in the range of 30-100MPa, and the flexural strength is in the range of 50-150MPa.

4. The exterior wall decorative panel according to claim 1, characterized in that: The thickness of the polystyrene foam board layer is in the range of 20-50 mm; and / or The density of the polystyrene foam board layer is 10-60 kg / m³. 3 Within the range.

5. The exterior wall decorative panel according to claim 1, characterized in that: The thickness of the sound-absorbing cotton layer is in the range of 10-15mm; and / or The aspect ratio of the cotton fibers in the sound-absorbing cotton layer is in the range of 10-20.

6. The exterior wall decorative panel according to claim 1, characterized in that, The density of the sound-absorbing cotton layer is 12–48 kg / m³. 3 Within the range.

7. The exterior wall decorative panel according to claim 1, characterized in that, The thickness of the polycarbonate layer is in the range of 5-15 mm.

8. The exterior wall decorative panel according to claim 1, characterized in that, The titanium dioxide coating is a nano-titanium dioxide coating.

9. The exterior wall decorative panel according to claim 1, characterized in that, The thickness of the titanium dioxide coating is in the range of 100-1000 nm; and / or The titanium dioxide particles in the titanium dioxide coating have a particle size in the range of 20-30 nm.

10. The exterior wall decorative panel according to claim 1, characterized in that, The surfaces of both the card slot and the card block have undergone micro-roughening treatment, with the surface roughness Ra ranging from 1.6 to 3.2 μm.

Images