1. Introduction:
The surface coating of aluminum sheets utilizes advanced technology from Korea and a high-precision four-color printing unit. The common types of color coatings include fluorocarbon (PVDF) and polyester (PE). These coatings offer vibrant, realistic colors and stable performance with high corrosion resistance. After special treatment, the surface quality of these sheets can be guaranteed for up to 30 years. Given that aluminum has the lowest weight per unit volume among metal materials, color-coated aluminum sheets have become highly popular in the building decoration industry.
Pre-painted color coated coils use various types of paints to provide durability, aesthetic appeal, and specific performance characteristics. The common types of paints used for these coils include polyester, silicone-modified polyester, high-durability polyester, and polyvinylidene fluoride (PVDF). Each type of paint has distinct features that make it suitable for different applications.
Types of Paints Used in Pre-painted Color Coated Coils
1. Polyester (PE)
- Characteristics:
- Good Adhesion: Adheres well to the substrate, ensuring long-lasting performance.
- Wide Range of Colors: Available in a variety of colors to meet aesthetic requirements.
- Formability: Suitable for forming processes such as bending and shaping.
- Durability: Provides good durability for outdoor use, although not as high as other coatings.
- Cost: Relatively low cost, making it a popular choice for a variety of applications.
- Applications: General building materials, interior decoration, and appliances.
2. Silicone-Modified Polyester (SMP)
- Characteristics:
- Improved Hardness: Higher film hardness compared to standard polyester, enhancing abrasion resistance.
- Heat Resistance: Better heat resistance, making it suitable for high-temperature environments.
- Exterior Durability: Good exterior durability with resistance to chalking and gloss retention.
- Flexibility: Maintains general flexibility, although slightly less than polyester.
- Cost: Medium cost, offering a balance between performance and expense.
- Applications: Building panels, roofing, and other exterior applications where enhanced durability is needed.
3. High-Durability Polyester (HDP)
- Characteristics:
- Excellent Color Retention: Superior color retention and resistance to UV radiation, preventing fading.
- Durability: Exceptional exterior durability and resistance to chalking.
- Adhesion: Good adhesion to the substrate, ensuring long-lasting performance.
- Cost-Performance: Offers an excellent balance between cost and performance.
- Applications: High-end architectural panels, roofing, and structures exposed to harsh weather conditions.
4. Polyvinylidene Fluoride (PVDF)
- Characteristics:
- Superior Color Retention: Best-in-class color retention and UV resistance, preventing fading over time.
- Durability: Exceptional outdoor durability and resistance to chalking.
- Solvent Resistance: Excellent resistance to solvents and chemicals.
- Formability: Good formability, making it suitable for complex shapes.
- Dirt Resistance: Resistant to dirt accumulation, maintaining a clean appearance.
- Cost: Higher cost due to superior performance characteristics.
- Applications: High-end architectural projects, curtain walls, commercial buildings, and industrial applications.
2. Application:
1. Pre-painted Color Coated Aluminum Coil:
- Applications: Building facades, roofing, ceilings, curtain walls, interior decoration, signage, and packaging.
- Advantages: Ideal for applications where lightweight, corrosion resistance, and aesthetic flexibility are crucial.
2. Color Coated Steel Coil:
- Applications: Roofing, wall cladding, automotive components, appliances, and industrial equipment.
- Advantages: Preferred in applications requiring high structural strength and durability, such as industrial and construction projects.
3. Differences and Characteristics of Each Material
1. Pure Aluminum (AA1100):
- Advantages: High purity, excellent resistance to chemical and atmospheric corrosion, high electrical and thermal conductivity.
- Disadvantages: Low strength, not suitable for high-stress applications.
2. Aluminum-Manganese Alloy (AA3003):
- Advantages: Better strength than pure aluminum, good corrosion resistance, good formability.
- Disadvantages: Lower strength compared to alloys with magnesium or silicon.
3. Aluminum-Manganese-Magnesium Alloy (AA3004):
- Advantages: Higher strength, good workability, and corrosion resistance.
- Disadvantages: Slightly more difficult to form compared to AA3003.
4. Aluminum-Magnesium-Silicon Alloy (AA3105):
- Advantages: Balance of strength and workability, good corrosion resistance.
- Disadvantages: Not as strong as higher magnesium content alloys like AA5052.
5. Aluminum-Magnesium Alloy (AA5052):
- Advantages: Excellent corrosion resistance, high strength, good workability.
- Disadvantages: More expensive, harder to machine than pure aluminum.
6. Aluminum-Zinc Alloy (AA6061):
- Advantages: High strength, good corrosion resistance, good machinability.
- Disadvantages: Lower corrosion resistance in marine environments compared to AA5052.
Conclusion
Color coated aluminum coils are versatile and widely used due to their excellent corrosion resistance, aesthetic appeal, lightweight, and environmental benefits. Various grades of aluminum, such as AA1100, AA3003, AA3004, AA3105, AA5052, and AA6061, each offer unique characteristics, making them suitable for different applications. Understanding the properties and differences of these materials helps in selecting the right type of aluminum coil for specific needs and applications.
| Parameter | Specification Range |
| Alloy Series | 1000, 3000, 5000, 6000 series |
| Alloy Grades | 1050, 1100, 3003, 3105, 5005, 5052, 6061 |
| Temper | H14, H24, H16, H26, H18, H28 |
| Thickness | 0.2mm - 1.5mm |
| Width | 800mm - 1600mm |
| Coil Weight | 2.5 tons - 3.0 tons |
| Coil Diameter | Inner: 150mm, 405mm, 505mm; Outer: 1200mm |
| Coating Type | PE (Polyester), PVDF (Polyvinylidene Fluoride), SMP (Silicone Modified Polyester) |
| Coating Thickness | Top: 15-30 microns; Back: 5-20 microns |
| Color | RAL Colors, Custom Colors |
| Surface Treatment | Mill Finish, Anodized, Brushed, Embossed |
| Protective Film | With or without protective film |
| Standard | ASTM, EN, JIS |
| Gloss | 20%-80% |
| Surface Quality | Smooth, no visible defects |
| Corrosion Resistance | Excellent (particularly in marine and industrial environments) |
| Thermal Reflectivity | High |
| Environmental Impact | 100% Recyclable |
| Applications | Construction, Automotive, Aerospace, Household Appliances, Packaging |
5. Paint Suppliers & Partners:
6. Projects:
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