Pre Painted Steel Coil with 5-7μm Back Coating Thickness 508/610mm Coil ID and 3-8MT Coil Weight for Construction and Manufacturing
Pre Painted Steel Coil with 5-7μm Back Coating Thickness 508/610mm Coil ID and 3-8MT Coil Weight for Construction and Manufacturing
１．Product Overview
Pre Painted Steel Coil is a color coated steel material designed for construction, manufacturing, appliance production, and industrial fabrication. The product combines galvanized or galvalume steel substrate with organic paint coating systems to provide stable corrosion resistance, surface durability, and decorative appearance.
The coil adopts zinc coating from 30-275g/m² together with 10-25μm top coating and 5-7μm back coating, helping improve weather resistance, coating adhesion, and long-term surface stability in indoor and outdoor applications.
２．Technical Solution
The steel substrate is continuously cleaned, chemically treated, coated, and cured through a continuous coil coating production process. The zinc layer provides sacrificial corrosion protection, while the paint coating improves UV resistance, moisture resistance, and surface appearance.
Different paint systems are suitable for different working conditions:
- PE coating is suitable for general construction and indoor applications.
- SMP coating provides improved weather resistance and gloss retention.
- HDP coating improves resistance to chalking and fading.
- PVDF coating provides stronger UV resistance and corrosion protection for severe outdoor environments.
- The controlled coating thickness and curing process help maintain coating adhesion, bending performance, and surface consistency.
３．Specifications
| Parameter | Value |
|---|---|
| Product Name | Pre Painted Steel Coil |
| Product Type | PPGI Coil / PPGL Coil |
| Width | 700-1250mm |
| Coil Weight | 3-8MT |
| Coil ID | 508/610mm |
| Zinc Coating | 30-275g/m² |
| Top Coating Thickness | 10-25μm |
| Back Coating Thickness | 5-7μm |
| Paint Type | PE / SMP / HDP / PVDF |
| Color Standard | RAL Color System |
| Surface Treatment | Pre-painted |
４．Application
The product is widely used for roofing sheets, wall cladding panels, sandwich panels, rolling shutters, ceiling systems, steel structures, and prefabricated buildings.
In appliance manufacturing, the material is commonly used for refrigerators, washing machines, microwave ovens, and air conditioner panels due to its stable surface quality and decorative appearance.
The coil is also suitable for furniture manufacturing, electrical cabinets, signage systems, agricultural facilities, and light industrial equipment requiring corrosion-resistant coated steel materials.
５．Processing
The coil can be processed through roll forming, slitting, bending, stamping, profiling, and cutting operations. Stable coating adhesion helps reduce coating cracking during fabrication.
For outdoor construction applications, higher zinc coating and PVDF or HDP paint systems are generally recommended to improve long-term weather resistance and color stability.
Proper storage and dry transportation conditions are recommended to reduce edge corrosion and coating contamination during processing.
６．Advantages
- Excellent corrosion resistance from zinc coating and paint system
- Stable coating adhesion for forming and fabrication operations
- Wide RAL color options for architectural applications
- Multiple paint systems available for different environments
- Consistent surface quality suitable for industrial production
- Compatible with standard 508mm and 610mm coil processing equipment
- Suitable for roofing, wall panels, appliances, and decorative applications
７．How to Choose
- For indoor decorative applications, PE coating is generally selected because of cost efficiency and stable appearance.
- For outdoor roofing and wall systems exposed to sunlight and rain, SMP or HDP coatings provide improved weather resistance and coating durability.
- For coastal, industrial, or high UV environments, PVDF coating together with higher zinc coating levels can help improve long-term corrosion protection and color retention.
- The required width, coil weight, and coating specifications should be selected according to processing equipment, structural design, and environmental exposure conditions.
８．FAQ
Q1．What zinc coating range is available for this pre painted steel coil
The zinc coating range is 30-275g/m².
Q2．What paint coating systems are available
PE, SMP, HDP, and PVDF paint coatings are available.
Q3．What is the top coating thickness range
The top coating thickness ranges from 10μm to 25μm.
Q4．What industries commonly use this product
The product is widely used in construction, home appliances, furniture, roofing systems, wall panels, and industrial fabrication.
Q5．What coil IDs are available
Standard coil IDs are 508mm and 610mm.
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