Painted embossed aluminum sheet is a new type of material that combines decoration and functionality. By applying color coating and embossing technology on the surface of the aluminum sheet, a muti-function aluminum sheet product with the characteristics of light weight, corrosion resistance, and easy processing is formed. As a supplier of aluminum products, BCM Alu wan to introduce this unique product for you.
1. Core characteristics and advantages
- Material performance
Color painted embossed aluminum sheet uses 1060, 3003, 5052 and other aluminum alloys as the base material. The density is only 1/3 of that of steel. It is light in weight and high in strength (for example, the tensile strength of 3004 aluminum-magnesium-manganese alloy can reach more than 200MPa). The surface coating uses polyester (10-year warranty) or fluorocarbon (30-year warranty) coating, which has excellent weather resistance, UV resistance, and acid and alkali corrosion resistance, and can adapt to extreme environments from -50℃ to 150℃.
- Decorative effect
The embossing process can form a variety of three-dimensional textures such as orange peel, five bars, diamond, and semi-sphere. Combined with color coating (such as RAL color card or customized color), it can meet the personalized design needs of architecture, home and other fields. For example, orange peel stucco embossed aluminum sheet is often used in cold storage liner, which is both non-slip and enhances visual texture; semi-spherical pattern is suitable for high-end packaging to enhance product grade.
- Processing performance
The material can be bent, stamped, welded and other processes. For example, 0.8mm thick color coated embossed aluminum sheet can be deep-drawn into lamp reflectors or automotive interior parts, and the processing loss rate is less than 5%. Some companies use laser cladding technology to repair surface scratches to ensure coating adhesion and overall quality.
2. Application fields and typical cases
- Architectural field
Exterior walls and roofs: Painted embossed aluminum sheets are used in large public buildings such as airports and high-speed rail stations.
Indoor decoration: Pointer-shaped or diamond-shaped embossed aluminum sheets are often used for ceilings and partitions in hotels and shopping malls, creating a sense of spatial hierarchy through changes in light and shadow.
Industrial buildings: 3003 anti-rust painted aluminum sheets are used in anti-corrosion and thermal insulation projects in power plants and chemical plants, and surface color coating can extend the service life to more than 20 years.
- Transportation and home appliances
Five bar anti-slip aluminum plates are used for car luggage racks and ship decks, and the friction coefficient can reach more than 0.6, which significantly improves safety.
Mirror or brushed embossed aluminum sheets are used for refrigerator and air conditioner panels, which are scratch-resistant and easy to clean. For example, a certain brand of refrigerator panels uses 0.6mm thick 5052 alloy color-coated plates with a surface hardness of more than 2H.
- Packaging and industrial equipment
Food can lids and medicine packaging boxes use 1060 pure aluminum embossed sheet with a thickness of 0.08-0.23mm, which has both sealing and aesthetics.
The factory anti-skid walkway and oil platform deck use 3003 alloy embossed aluminum sheet, with a surface embossing depth of 0.3-0.5mm, which can withstand a load of 2 tons/㎡.
3. Production process
The typical process is "two coatings and two baking":
- Pretreatment: alkaline washing and degreasing → chemical conversion treatment (chromate or chromium-free passivation), forming a 1.5-4μm thick conversion film to enhance the adhesion of the coating.
- Coating and baking: Roller coating of polyester or fluorocarbon coating, initial coating thickness of 5-7μm, top coating of 10-14μm, baking temperature of 180-220℃, curing time of 3-5 minutes.
- Embossed molding: Preset patterns are pressed out on the surface of the aluminum sheet by precision rollers, and the embossing height difference is controlled at 0.1-0.8mm, and the flower formation rate deviation is ≤5%.
4. Key Points for Purchase
- Material Selection: 3004 aluminum-magnesium-manganese alloy is preferred for building exterior walls, and 5052 alloy can be selected for home appliance panels; 5083 seawater-resistant aluminum sheet is recommended for corrosive environments.
- Coating Inspection: Suppliers are required to provide salt spray resistance test reports (polyester ≥500 hours, fluorocarbon ≥1000 hours) to avoid using recycled aluminum substrates.
- Embossing process: Check the uniformity of embossing depth, such as the surface roughness Ra of orange peel aluminum sheet should be between 1.6-3.2μm to ensure anti-slip performance.
Painted embossed aluminum sheet combines the lightness and durability of aluminum alloy with the beauty and uniqueness brought by color coating and embossing technology. It is widely used in many fields such as construction, decoration and home furnishing.
