Prepaited Steel Coil
Long-Lasting Protection: Service life of 10–30 years depending on coating system, even in harsh environments.
Versatile Coating Options: Wide range of paints (PE, HDP, SMP, PVDF, PU, etc.) for customized performance and aesthetics.
Excellent Workability: Maintains high strength and ductility for bending, stamping, and deep drawing applications.
Wide Application Range: Ideal for construction, appliances, transportation, and decorative industries, meeting both functional and aesthetic requirements.
Prepainted steel sheet is also referred to as "color coated plate" or "color plate", it is usually based on the galvanized steel sheet and galvalume steel sheet for surface treatment, on its surface coated with a certain thickness of paint or adhesion on a layer of organic film, after curing molding to become "color plate", with excellent corrosion resistance, formability, decorative, It is widely used in construction, home appliances, light industry, transportation and other industries, and has become an ideal composite material.
Performance Parameter
Paint Type | type | Coating thickness um | MEK | Special bend | 5% HCI | 5% NaOH | Neutral salt spray | QUV-A | Ambient aging performance |
PE | Z/AZ/ZM | ≥20 | ≥200 | 3T | 24 hours | 24 hours | 1000 hours | 1000 hours | 10 years |
HDP | Z/AZ/ZM | ≥23 | ≥200 | 3T | 24 hours | 24 hours | 1500 hours | 1500 hours | 15 years |
SMP | Z/AZ/ZM | ≥23 | ≥200 | 3T | 24 hours | 24 hours | 1500 hours | 1500 hours | 15 years |
PVDF | Z/AZ/ZM | ≥25 | ≥300 | 2T | 24 hours | 24 hours | 2000 hours | 3000 hours | 20-30 years |
PU | Z/AZ/ZM | ≥40 | ≥100 | 2T | 24 hours | 24 hours | 720 hours | 1000 hours | 10-20 years |
Cold film | Z/AZ/ZM | ≥100 | / | 0T | 360 hours | / | / | / | 10 years |
Colorful printing | Z/AZ/ZM | ≥25 | ≥100 | 3T | 24 hours | 24 hours | 600 hours | 1000 hours | 10 years |
Textured Pattern | Z/AZ/ZM | ≥25 | ≥100 | 2T | 24 hours | 24 hours | 1000 hours | 1000 hours | 10 years |
PE.PRO | Z/AZ/ZM | ≥25 | ≥1000 | 3T | 120 hours | 120 hours | 2000 hours | 2000 hours | 15 years |
HDP.PRO | Z/AZ/ZM | ≥25 | ≥1000 | 3T | 120 hours | 120 hours | 2500 hours | 3000 hours | 20 years |
Features
Excellent Corrosion Resistance: Advanced paint systems provide long-lasting protection against rust, acid, alkali, and salt spray environments.
Superior Decorative Effect: Smooth, colorful, and customizable finishes including gloss, matte, embossed, and suede textures.
High Formability & Processing: Coated steel maintains strong bending, stamping, and deep drawing properties without cracking or peeling.
Durable Performance: UV resistance, aging stability, and service life up to 30 years depending on the coating system.
Structure
Prepainted steel sheet is a multi-layer composite material consisting of:
Steel Substrate: High-quality galvanized steel or galvalume steel base.
Chemical Conversion Layer: Enhances adhesion between steel and paint.
Primer Coating: Provides anti-corrosion protection.
Top Paint Layer or Organic Film: Delivers decorative color, texture, and additional durability.
(Optional) Backside Coating or Film: Improves adhesion and resistance to scratching and wear.
This structure ensures both mechanical strength of steel and long-lasting surface protection.
Applications
With its combination of strength, beauty, and durability, prepainted steel sheet is widely used in:
Construction: Roofing, wall cladding, ceiling panels, doors, and decorative facades
Home Appliances: Refrigerators, washing machines, ovens, and air conditioners
Transportation: Car body panels, containers, and railway coaches
Light Industry & Furniture: Electrical cabinets, lighting fixtures, office furniture, and decorative panels
