Pre Painted PPGI Steel Coil with 10–25μm Top Coating and 30–275g/m² Zinc Coating for Roofing and Infrastructure Panels
Pre Painted PPGI Steel Coil with 10–25μm Top Coating and 30–275g/m² Zinc Coating for Roofing and Infrastructure Panels
１．Product Overview
Pre Painted Steel Coil is a color coated steel material designed for roofing systems, wall cladding, appliance panels, infrastructure projects, and industrial fabrication. The product combines zinc coating protection with pre-painted surface treatment to improve corrosion resistance, surface durability, and appearance consistency.
With multiple paint systems including PE, SMP, HDP, and PVDF, the coil can be selected according to indoor, outdoor, coastal, or high UV exposure environments.
２．Technical Solution
The steel substrate is processed with zinc coating and continuous paint coating technology. The zinc layer improves resistance to moisture and corrosion, while the paint coating system improves weather resistance, color retention, and surface protection.
The 10–25μm top coating provides the exposed surface protection layer for outdoor and visible applications. The 5–7μm back coating improves reverse-side corrosion resistance during transportation, roll forming, installation, and long-term service.
PE coating is commonly used for general construction panels, while SMP, HDP, and PVDF coatings are suitable for higher durability and outdoor exposure requirements.
３．Specifications
| Parameter | Value |
|---|---|
| Product Name | Pre Painted Steel Coil |
| Product Type | PPGI Coil / Color Coated Steel 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 Coating | PE / SMP / HDP / PVDF |
| Color System | RAL Color System |
| Surface Treatment | Pre-painted |
４．Application
- Roofing panels
- Wall cladding systems
- Infrastructure construction panels
- Appliance outer panels
- Ceiling systems
- Industrial equipment panels
- Electrical cabinets
- Automotive interior panels
- Furniture components
- Decorative metal panels
５．Processing
- Roll forming
- Slitting
- Cut-to-length processing
- Bending
- Stamping
- Panel fabrication
- Protective film lamination
- Profiling
６．Advantages
- 30–275g/m² zinc coating improves corrosion resistance for indoor and outdoor environments.
- 10–25μm top coating improves surface durability and weather resistance.
- 5–7μm back coating improves reverse-side protection during fabrication and installation.
- PE, SMP, HDP, and PVDF paint systems support different climate and exposure conditions.
- RAL Color System supports stable color consistency for architectural and appliance applications.
- 700–1250mm width range supports multiple panel and fabrication requirements.
- 508 / 610mm coil ID supports compatibility with common decoiling equipment.
７．How to Choose
- For general indoor construction use, PE coating is commonly selected.
- For roofing and exterior wall systems, SMP or HDP coating provides improved weather resistance.
- For coastal, industrial, or high UV environments, PVDF coating is recommended.
- Higher zinc coating levels are suitable for outdoor exposure and humid environments.
- Confirm coil width, coil ID, and coil weight according to production line requirements before ordering.
８．FAQ
Q1．What is the zinc coating range
The zinc coating range is 30–275g/m².
Q2．What paint coating systems are available
PE, SMP, HDP, and PVDF paint coating systems are available.
Q3．What is the top coating thickness
The top coating thickness is 10–25μm.
Q4．What is the back coating thickness
The back coating thickness is 5–7μm.
Q5．What coil IDs are available
508mm and 610mm coil IDs are available.
Q6．What industries use this product
The product is commonly used in roofing, wall cladding, infrastructure construction, appliances, automotive panels, furniture, and industrial fabrication.
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