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Marble grain aluminum coils are an innovative material combining the lightweight and durable properties of aluminum coils with the aesthetic appeal of marble textures. The surface undergoes special treatment and printing to achieve a marble-like effect. The marble grain aluminum coil for composite panel are commonly used in architectural decoration, interior design, and furniture manufacturing, and are widely popular due to their lightweight, corrosion resistance, ease of processing and maintenance.

As an ideal decoration material, the marble grain aluminum coil for composite panel have core characteristics as following:

Lightweight and high strength:

The aluminum coil substrate has a low density (approximately 2.7 g/cm³), weighing only 1/3 to 1/5 of traditional marble, significantly reducing building load. After lamination as composite panel, the structural stability is enhanced by aluminum honeycomb panels or ceramic tile substrates, increasing bending and flexural strength by over 50% and reducing transportation breakage rate by 80%.

Weather resistance and corrosion resistance:

The surface is coated with fluorocarbon or polyester paint, resisting UV radiation and acid/alkali corrosion, with an outdoor service life of over 15 years. After passivation treatment, a dense oxide film forms on the aluminum coil, achieving no white rust after 1000 hours of salt spray testing, making it suitable for humid environments.

Decorative and personalized features:

Through a "six-coat, three-bake" process (primer + topcoat + 2-4 layers of fluorocarbon stone-textured paint), texture realism is achieved ≥95%, supporting customized natural marble, wood grain, and metal textures. Color uniformity (color difference ΔE≤2) and gloss (high gloss ≥85/matte ≤30) can be precisely controlled to meet high-end design needs.

Production process of marble grain aluminum coil:

Aluminum coil pretreatment:

3003 or 5005 series aluminum alloy coils, 0.2-0.5mm thick, are degreased (alkaline solution spraying) and passivated (chromate or chromium-free conversion) to form a corrosion-resistant layer.

Coating process:

Primer: Epoxy resin or polyester resin, coating thickness 5-10μm, adhesion ≥5B (cross-cut test).

Topcoat: Fluorocarbon paint (PVDF content ≥70%) or polyester paint, fluorocarbon paint thickness 20-30μm, polyester paint thickness 15-25μm, cured at 200-230℃.

Marble grain spraying: Fluorocarbon stone texture paint is applied using an automatic air spray gun, achieving a three-dimensional texture effect through multi-layer layering.

Post-processing and Inspection:

Edge trimming and cutting (length deviation ≤ ±2mm, diagonal deviation ≤ 3mm), surface film application (PE protective film, thickness 0.05-0.1mm). Inspection items include thickness deviation (measured with a micrometer), impact resistance (1kg steel ball dropped from a height of 1m test), and weather resistance (color difference ΔE ≤ 3 after 2000 hours of xenon lamp aging).

Advantages of marble grain aluminum coil for composite panel:

Lightweight and high strength:

Aluminum coils are relatively lightweight, facilitating transportation and processing, while maintaining high strength to meet various structural requirements.

Aesthetics:

The marble texture gives the coated aluminum coil e a decorative look, providing a high-end and sophisticated visual effect, suitable for the decorative needs of upscale venues.

Corrosion resistance:

Aluminum itself has good corrosion resistance, which is further enhanced after surface treatment, making it more suitable for humid or corrosive environments.

Easy to Process:

Aluminum coils can be cut, bent, welded, and processed in various ways, offering high flexibility.

Environmental protection:

Aluminum is recyclable, aligning with modern environmental trends.

Marble grain aluminum coil for composite panel has wide application scenarios as decoration material:

Building exterior walls:

Fluorocarbon coated marble grain aluminum composite panels (4mm thick, 0.3mm aluminum) are used for office buildings and hotel curtain walls, with a service life of ≥15 years and a color retention rate of 90% after 5 years.

Interior decoration:

Polyester coated marble grain aluminum composite panels (3mm thick) are used for ceilings and partitions, offering convenient installation and formaldehyde emission ≤0.1mg/m³ (compliant with national standards).

Special applications:

Marble grain aluminum honeycomb composite panels are used in large buildings such as airports and exhibition halls, offering significant sound insulation and moisture resistance; aluminum-plastic composite panels are suitable for ultra-thin ceiling decoration.