JIS G3312 PPGL Coil with AZ30–AZ150 Galvalume Base and 25±5μm Top Paint for Roofing and Exterior Panels

JIS G3312 PPGL Coil with AZ30–AZ150 Galvalume Base and 25±5μm Top Paint for Roofing and Exterior Panels

1. Product Overview

PPGL color prepainted galvalume steel coil is used where a painted finish and long-term substrate protection are both required. Compared with ordinary painted sheet on a basic metallic substrate, PPGL uses an aluminum-zinc coated base metal and then applies an organic paint system on top, which is suitable for roofing sheets, wall panels, appliance shells, and other visible fabricated parts.

For this specification, the thickness range of 0.2–1.0 mm and width range of 700–1250 mm fit common roll forming, cut-to-length, and panel production lines. A 1.0 mm PPGL coil is often chosen when higher rigidity is needed in formed sheets or structural-facing panels.

2. Technical Solution

Product performance is based on:

• Galvalume base metal with AZ30–AZ150 aluminum-zinc coating
• Organic paint layer adding decorative finish and additional barrier protection
• Top paint thickness of 25±5 μm for exposed-side coverage
• Back paint thickness of 7±2 μm for reverse-side protection in standard service
• Soft commercial quality or LFQ for general bending and roll forming

In practical use, AZ coating level influences substrate-side corrosion resistance, while the paint system affects weatherability, chalking resistance, and color retention. Polyester is commonly used for standard projects, SMP for stronger weather exposure, and PVDF when UV resistance and long-term exterior durability are more critical.

3. Specifications

4. Application

• Roofing sheets for workshops, airports, and warehouses
• Wall cladding and exterior facade panels
• Home appliance outer panels
• Container-related sheet parts
• Vehicle and light equipment panels
• General prepainted building sheet fabrication

5. Processing

• Cut-to-length sheet production
• Slitting into narrower strips
• Roll forming into roofing and wall profiles
• Bending and folding
• Protective film application on the top side when required
• Custom cutting and slitting according to project designation

6. Advantages

• Galvalume substrate provides aluminum-zinc based corrosion protection
• AZ30–AZ150 range allows substrate selection by service environment
• Top coating of 25±5 μm is suitable for visible construction panels
• 700–1250 mm width range fits mainstream panel and roll forming lines
• 1.0 mm option provides better rigidity for formed panels
• Available in common RAL colors for architectural and appliance use

7. How to Choose

• General roofing and wall panel use → Polyester is commonly selected
• Projects requiring stronger weather resistance → SMP is often preferred
• Long-term exterior exposure and higher UV demand → PVDF is usually selected
• Higher panel rigidity requirement → 1.0 mm thickness is commonly used
• More demanding outdoor corrosion environment → higher AZ coating such as AZ100–AZ150 is generally preferred
• Visible architectural use → confirm color, gloss, paint thickness, and protective film requirement before order

8. FAQ

Q1: Is this product PPGI or PPGL?
This specification is PPGL, which uses a galvalume steel substrate rather than a galvanized-only substrate.

Q2: What does AZ150 mean?
AZ150 refers to the aluminum-zinc coating level on the galvalume base metal. Higher AZ levels are generally selected when stronger substrate corrosion resistance is required.

Q3: Can this coil be processed into roofing sheets?
Yes. It is commonly used for roll formed roofing sheets, wall cladding profiles, and other construction panels.

Q4: What is the difference between Polyester, SMP, and PVDF?
These are different paint systems. Polyester is common for standard projects, SMP is used for stronger weather demand, and PVDF is generally selected for higher UV resistance and long-term exterior service.

Q5: Why is 1.0 mm PPGL coil used in some projects?
Because thicker material can provide better rigidity and panel stability in roofing, wall cladding, and formed sheet applications.