Aluminum-plastic composite panels for general decoration
Ordinary decorative aluminum-plastic composite panels are a decorative material composed of two aluminum alloy sheets (0.2-0.5mm thick) with a polyethylene (PE) core layer. They feature light weight, high strength, and excellent decorative properties. They are widely used in building exteriors, interior walls, billboards, and other applications. The aluminum alloy sheets are typically 3003 or 5005 series aluminum-manganese alloys. Surface treatments (such as fluorocarbon spraying or polyester spraying) provide excellent weather and corrosion resistance, with a color retention period of 10-15 years. The PE core layer is made of high-density polyethylene, which offers excellent toughness and thermal insulation. This reduces the weight of the composite panels to just one-fifth that of stone panels of the same thickness, significantly reducing the load on the building structure. The standard size of the composite panels is 1220mm x 2440mm, with a thickness of 4-6mm. They can be cut, bent, or processed as needed.
The production process for standard decorative aluminum-plastic composite panels primarily involves aluminum sheet pretreatment, composite molding, and post-processing, with the key focus being ensuring interlayer bond strength. First, the aluminum alloy sheet undergoes degreasing and chromizing to remove surface oil and oxide layers, forming a chemical conversion coating that enhances adhesion with the adhesive. Next, a two-component polyurethane adhesive is evenly applied to the aluminum sheet and the PE core layer, with a coating weight of 80-100g/m². The three layers are laminated together using a hot press laminating machine (temperature 120-150°C, pressure 0.5-1MPa), ensuring an interlayer bond strength of ≥7N/10mm. The laminated panels undergo an aging treatment (40-50°C, 72 hours) to fully cure the adhesive. Following this, the panels are trimmed and film applied. Finally, they undergo flatness testing (deviation ≤ 3mm/m) and impact resistance testing to ensure product quality.
In building exterior wall decoration, aluminum-plastic composite panels (APCs) are a common curtain wall material used for general decorative purposes. Low-rise buildings typically install APCs on their exterior walls using either dry hanging or adhesive bonding. By selecting panels with different colors and textures, a diverse architectural appearance can be achieved. For example, a residential complex using light gray APCs for its exterior walls saw a 15% reduction in building energy consumption. Commercial buildings often utilize curved APCs for entrance doors and columns. These panels, created through cold bending to create smooth, curved shapes, enhance the building’s modern feel. In the renovation of older buildings, APCs can be directly bonded to existing walls, resulting in a short construction period and low costs. The use of this material in an office building renovation project reduced construction time by 40%.
Aluminum-plastic composite panels (APCs) are widely used in interior decoration and advertising. They are used on the interior walls and ceilings of shopping malls and hotels. Their smooth, easy-to-clean surface and soundproofing properties are impressive. One shopping mall reduced cleaning and maintenance costs by 30% after adopting white APC ceilings. Exhibition booths utilize APCs extensively, creating temporary display spaces through quick assembly. The materials can be recycled after the exhibition closes, embracing the concept of green exhibitions. In billboard production, APCs serve as substrates, allowing for inkjet or UV printing. The resulting images are vibrant and weather-resistant. One outdoor billboard, using this material, has seen its image retention extend to over two years.
With the development of the building decoration industry, the performance and variety of aluminum-plastic composite panels for general decoration have continued to expand. Manufacturers have developed fire-resistant aluminum-plastic composite panels with a core layer made of PE material filled with aluminum hydroxide, achieving a B1 flame retardancy standard, expanding their application in high-rise buildings. To meet environmental protection requirements, chromium-free composite panels have been introduced to reduce heavy metal pollution while increasing aluminum recycling rates to over 90%. In terms of functionalization, self-cleaning aluminum-plastic panels have been developed, using a surface nano-coating to achieve rainwater self-cleaning, reducing maintenance costs. In the future, with the development of green buildings and prefabricated construction, general decorative aluminum-plastic composite panels will develop towards more environmentally friendly, lighter, and more versatile options, providing a higher-quality material choice for building decoration.
