700–1250mm Pre-painted Steel Coil with 30–275g/m² Zinc Coating and 10–25μm Top Coating for Roofing and Wall Panel Applications
700–1250mm Pre-painted Steel Coil with 30–275g/m² Zinc Coating and 10–25μm Top Coating for Roofing and Wall Panel Applications
１．Product Overview
Pre-painted steel coil is a color coated metal material manufactured using galvanized steel substrate combined with continuous organic coating technology. The product provides stable corrosion resistance, decorative appearance, and processing performance for roofing panels, wall cladding systems, appliance manufacturing, and industrial fabrication.
With zinc coating from 30–275 g/m² and top coating thickness from 10–25 μm, the product supports long-term outdoor exposure and industrial processing requirements.
２．Technical Solution
The production process includes galvanized substrate preparation, chemical pretreatment, primer coating, top coating, curing, and back coating treatment.
The zinc coating improves corrosion resistance by providing barrier and sacrificial protection to the steel substrate. Top coating thickness of 10–25 μm improves UV resistance, weather stability, gloss retention, and surface durability.
PE, SMP, HDP, and PVDF coating systems support different environmental conditions including standard outdoor exposure, industrial atmosphere, and coastal applications.
３．Specifications
| Parameter | Value |
|---|---|
| Product Type | Pre-painted Steel Coil |
| Width | 700–1250 mm |
| Zinc Coating | 30–275 g/m² |
| Top Coating Thickness | 10–25 μm |
| Back Coating Thickness | 5–7 μm |
| Paint Coating | PE / SMP / HDP / PVDF |
| Coil Weight | 3–8 MT |
| Coil ID | 508 mm / 610 mm |
| Color System | RAL Color System |
| Surface Treatment | Pre-painted |
| Application | Roofing / Wall Panels / Construction / Appliances |
４．Application
- Roofing sheet production
- Wall cladding systems
- Architectural façade panels
- Industrial building panels
- Home appliance outer shells
- Ceiling panel fabrication
- Decorative metal processing
- Industrial enclosure manufacturing
- Automotive decorative components
- Furniture panel fabrication
５．Processing
- Roll forming and profiling
- Cut-to-length sheet processing
- Slitting into narrow strips
- Bending and punching
- Protective film lamination
- Roofing panel fabrication
- Industrial stamping
- Decorative panel production
６．Advantages
- 30–275 g/m² zinc coating improves corrosion resistance for outdoor and industrial environments.
- 10–25 μm top coating improves surface durability and weather resistance.
- RAL color system supports consistent architectural color matching.
- PE, SMP, HDP, and PVDF coatings support different service-life requirements.
- 700–1250 mm width range supports roofing and wall panel processing compatibility.
- 3–8 MT coil weight supports continuous industrial production efficiency.
７．How to Choose
- For standard indoor applications, choose PE coating.
- For industrial outdoor environments, choose SMP or HDP coating.
- For coastal or high UV conditions, choose PVDF coating and higher zinc coating levels.
- For roofing and wall panel production, confirm width compatibility with roll forming equipment.
- For automated production lines, confirm coil ID and coil weight requirements.
８．FAQ
Q1: What zinc coating range is available?
The zinc coating range is 30–275 g/m².
Q2: What top coating thickness is available?
The top coating thickness range is 10–25 μm.
Q3: What paint coating systems are available?
PE, SMP, HDP, and PVDF coating systems are available.
Q4: What coil IDs are supported?
508 mm and 610 mm coil IDs are available.
Q5: What applications commonly use this product?
Roofing panels, wall cladding systems, appliances, and industrial fabrication commonly use this product.
Q6: What color system is used?
The product uses the RAL Color System for standardized color control and customization.
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