1.0mm PPGI Prepainted Galvanized Steel Coil with 1000mm Width and 25±5μm Top Coating for Roofing and Construction Panels

1. Product Overview

PPGI prepainted galvanized steel coil is used where both corrosion protection and finished surface appearance are required. In roofing sheets, wall cladding, appliance panels, and light fabricated construction parts, the galvanized substrate provides the base protective layer, while the organic paint coating improves surface durability and color consistency.

For this specification, 1.0 mm thickness and 1000 mm width are suitable for panel forming, cut-to-length production, and roll forming lines. This size is commonly used when the project needs a balance between panel rigidity, forming stability, and efficient material utilization.

2. Technical Solution

Product performance is based on:

• Galvanized steel substrate for base corrosion protection
• Organic paint coating as an additional barrier layer
• Top coat thickness of 25±5 μm for visible surface coverage
• Back coat thickness of 7±2 μm for reverse-side protection
• CGCC or DX51D substrate for general forming and panel fabrication

For construction use, coating type is selected according to service environment. PE is commonly used for standard projects, SMP and HDP are selected when stronger weather performance is needed, and PVDF is used when long-term UV resistance and color retention are more important.

3. Specifications

4. Application

• Roofing sheets and roof accessories
• Wall cladding and facade panels
• Home appliance outer panels
• Container and light enclosure panels
• Roll formed construction profiles
• General decorative and functional building sheets

5. Processing

• Cut-to-length sheet production
• Slitting into narrower strips
• Roll forming into roofing and wall profiles
• Bending and folding
• Corrugated sheet production
• Protective film application when required

6. Advantages

• 1.0 mm thickness provides better panel rigidity than light-gauge decorative sheet
• 1000 mm width is practical for mainstream roofing and cladding production lines
• Top coating of 25±5 μm is suitable for visible construction surfaces
• Multiple paint systems allow selection by climate and exposure condition
• CGCC and DX51D grades support common forming operations
• RAL color customization helps match architectural appearance requirements

7. How to Choose

• General roofing and wall panels → PE is commonly selected
• Higher weather exposure → SMP or HDP is often preferred
• Long-term exterior color retention requirement → PVDF is usually preferred
• Higher rigidity requirement → 1.0 mm is commonly selected
• Project-based panel production → confirm width, coil ID, coil weight, and final profile before order

8. FAQ

Q1: Is this product PPGI or bare GI coil?
This specification is PPGI, which means a galvanized steel substrate plus an organic paint coating.

Q2: Why is 1.0 mm often used for construction panels?
Because it provides better rigidity and panel stability in roofing, wall cladding, and formed sheet applications.

Q3: What does 25±5 μm top coating mean?
It refers to the nominal paint film thickness on the exposed side, which affects surface coverage and outdoor durability.

Q4: Can this coil be processed into corrugated roofing sheets?
Yes. It can be cut, slit, and roll formed into roofing and wall cladding profiles.

Q5: Which coating system is suitable for stronger outdoor exposure?
SMP, HDP, or PVDF are generally selected when better weather resistance and longer exterior service performance are required.