Product Brief
Color Coated Laminated Steel Coil features a dual protection system of "coating + lamination", using galvanized/galvalume steel as substrate. Manufactured through precision roller coating and hot-press lamination processes, it delivers long-term weather resistance, scratch resistance, and durable aesthetic performance, widely used in high-end building envelopes, industrial facilities, and public infrastructure.
Product Overview
Color Coated Laminated Steel Coil represents a technical upgrade from traditional color coated products. By laminating a high-performance polyester or polyolefin functional film onto the organic coating surface, it forms a six-layer protective structure: "cold-rolled steel substrate + zinc coating + chemical conversion layer + epoxy primer + PVDF fluorocarbon topcoat + polyester lamination layer". This synergistic protection design of "chemical barrier + physical shield" maintains stable performance even in extreme environments, solving the pain points of ordinary color coated sheets such as easy scratching and poor stain resistance, while achieving long-term retention of color and texture, making it the preferred solution for high-end outdoor building envelope materials.
Core Advantages
Enhanced Protection Performance
The product achieves 3000-4500 hours of neutral salt spray resistance, a 20% improvement over ordinary fluorocarbon color coated products; artificial accelerated weathering resistance exceeds 5000 hours, with color warranty up to 20 years. The physical barrier formed by the lamination layer effectively resists wind-blown sand abrasion, hard object impact, and industrial dust adhesion. Even if the lamination is locally damaged, the underlying fluorocarbon coating still provides complete protection, extending the overall service life by 30% compared to single-coating products.
Long-Lasting Aesthetic Retention
The transparent protection of the lamination layer and the high color fastness of the fluorocarbon coating (ΔE≤1.0 over 5 years) create a synergistic effect, ensuring the product maintains over 90% of its initial gloss and color saturation after long-term use. Full Pantone color system customization is supported, enabling composite texture effects such as wood grain, stone grain, and metal grain to meet the diverse aesthetic design requirements of modern architecture.
Excellent Processability
The product features T-bend performance ≤2T and elongation ≥10%, with no coating cracking or lamination delamination during bending, stamping, and roll forming. The smooth lamination surface has a low friction coefficient, minimizing scratches during installation, with excellent sealant compatibility at joints, achieving IPX7 waterproof rating. Within the temperature range of -40°C to 70°C, the thermal expansion coefficients of all layers are matched, eliminating delamination or blistering risks
Full Life Cycle Value
Although the initial procurement cost is 15%-20% higher than ordinary color coated products, there is no need for frequent maintenance or replacement during the 20-year service life, reducing the full life cycle cost by 40%. Daily maintenance only requires annual surface inspection, with no need for repainting or film repair, maintenance costs are only 15% of traditional materials. The product recovery rate reaches 95%, with steel and lamination separable through professional processes, meeting green building requirements.
Technical Specifications
|
Item |
Parameter Range |
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|
Substrate Thickness |
0.22-2.0mm |
|
|
Coil Width |
700-1250mm |
|
|
Coil Inner Diameter |
508/610mm |
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|
Zinc Coating Weight |
80-275g/m² (double-sided) |
|
|
Primer Thickness |
5-50μm |
|
|
Topcoat Thickness |
10-50μm |
|
|
Coating Type |
PE/SMP/HDP/PVDF |
|
|
Pencil Hardness |
≥4H |
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|
Adhesion |
Grade 0 (cross-cut method) |
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|
Salt Spray Resistance |
≥3000 hours |
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Artificial Weathering |
≥5000 hours |
Application Scenarios
Building Sector
Industrial Facilities: Suitable for building envelope systems in high-corrosion environments such as chemical, metallurgical, and power plants, resistant to acid-alkaline gas erosion, with no corrosion traces for 8 years
Commercial Buildings: Exterior decoration of high-end office buildings and commercial complexes, achieving modern minimalist architectural aesthetics with no significant color fading for 5 years
Residential Buildings: Roofing and exterior walls of high-end residences in coastal areas, resisting salt spray corrosion with no rust or appearance degradation for 10 years
Warehousing & Logistics: Roofing systems for large logistics parks and bonded warehouses, installation efficiency reaching 1800㎡/day, 25% improvement over traditional materials
Industrial Sector
New Energy Power Stations: Building envelopes for photovoltaic and wind power stations, resistant to UV radiation and adaptable to extreme climate conditions
Chemical Parks: Protective fencing for chemical plants and tank farms, resistant to chemical corrosion, reducing maintenance costs by 80%
Food & Pharmaceutical: Interior wall systems for clean rooms and purification workshops, smooth surface easy to clean, complying with GMP specifications
Public Facilities
Transportation Hubs: Architectural decoration for airports, high-speed rail stations, and subway stations, resistant to pedestrian friction while maintaining long-term aesthetics
Sports & Exhibition Venues: Roofing systems for stadiums and convention centers, excellent large-span formability enabling complex architectural designs
Municipal Engineering: Bus shelters, road fencing, notice boards and other municipal facilities, self-cleaning efficiency reaching 95%, restored to cleanliness by rainwater washing
Manufacturing Process
1. Substrate Pretreatment
Using cold-rolled steel or hot-dip galvanized steel (zinc coating uniformity deviation ≤±5g/m²), processed through degreasing (alkaline cleaning to remove oil), pickling (removing scale), and phosphating (forming phosphate film). Substrate surface roughness is controlled at Ra 0.8-1.2μm to ensure tight bonding between coating and substrate.
2. Coating Application
Precision roller coating process is used to apply epoxy primer (8-12μm thickness) and PVDF fluorocarbon topcoat (25-30μm thickness), with topcoat fluorine content strictly ≥70%. Curing temperature is controlled at 230-250°C for 60-90 seconds to ensure complete coating drying, achieving Grade 0 adhesion in cross-cut test.
3. Film Lamination
High-performance polyester/polyolefin lamination (15-30μm thickness) is applied to the coating surface through hot-press composite process, with composite temperature controlled at 120-150°C and pressure 0.3-0.5MPa to ensure tight bonding between lamination and coating without bubbles or wrinkles. After lamination, cooling (temperature ≤60°C) is performed for shaping to enhance lamination stability.
4. Finishing & Inspection
After straightening (straightness deviation ≤0.2mm/m) and slitting (length error ≤±5mm), 18 quality inspections are conducted, including fluorine content of fluorocarbon coating (infrared spectrometer), lamination thickness (laser thickness gauge), salt spray resistance (neutral salt spray test), and scratch resistance grade (pencil hardness test), with finished product qualification rate exceeding 99.5%.
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