JIS G3312 AZ PPGL Coil with 25±5μm Top Paint for Buildings, Vehicles, and Roofing Sheet Production

1. Product Overview

AZ PPGL prepainted color steel coil is used where the project requires both a finished color surface and an aluminum-zinc coated substrate. Compared with ordinary painted sheet, this product combines galvalume base metal with an organic paint layer, which is suitable for roofing sheets, wall panels, vehicle parts, appliance covers, and other visible sheet applications.

For this specification, the 0.2–1.0 mm thickness range and 700–1250 mm width range fit common cut-to-length, slitting, and roll-forming lines. It is commonly selected for building and transport-related panels where surface appearance and substrate durability both matter.

2. Technical Solution

Product performance is based on:

• Hot dipped A-Z coated steel substrate as the base protective layer
• Organic paint coating adding an extra barrier and decorative finish
• Top paint thickness of 25±5 μm for visible-side coverage
• Back paint thickness of 7±2 μm for reverse-side protection
• Soft commercial quality or LFQ for profiling, bending, and lock-forming operations

For building and vehicle applications, service performance depends on the combined effect of AZ coating level, paint system, paint thickness, and forming radius. Polyester is commonly used for standard projects, SMP for stronger weather demand, and PVDF for higher UV resistance and longer exterior life.

3. Specifications

4. Application

• Roofing sheets for workshops, airports, and storerooms
• Wall cladding and facade panels
• Vehicle manufacturing sheet parts
• Shipbuilding and equipment sheet components
• Mechanical and electrical equipment covers
• Electrical household appliance outer panels

5. Processing

• Cut-to-length sheet production
• Slitting into smaller widths
• 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 customer designation

6. Advantages

• 0.2–1.0 mm thickness range fits mainstream roofing and panel production
• 700–1250 mm width range is suitable for common processing lines
• AZ30–AZ150 substrate range allows selection by service condition
• 25±5 μm top coating is suitable for visible construction and vehicle panels
• Soft commercial quality and LFQ improve forming flexibility
• RAL color customization supports project appearance matching

7. How to Choose

• General roofing and wall cladding → polyester is commonly selected
• Projects requiring stronger weather resistance → SMP is often preferred
• Higher UV and long-term exterior exposure → PVDF is usually selected
• Higher substrate protection demand → higher AZ coating such as AZ100–AZ150 is commonly preferred
• More demanding lock-forming or tighter profiling → LFQ is usually preferred
• Higher rigidity requirement → select the upper end of the 0.2–1.0 mm thickness range

8. FAQ

Q1: Is this product PPGI or PPGL?
This specification is aligned as PPGL because the source defines a hot dipped A-Z coated steel or galvalume steel base with AZ30–AZ150 coating.

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

Q3: Can this coil be processed into roofing sheets?
Yes. It is commonly cut, slit, and roll formed into roofing sheets and wall cladding profiles.

Q4: What is the meaning of 25±5 μm top and 7±2 μm back paint?
It refers to the nominal paint film thickness on the exposed side and reverse side, which affects surface coverage and coating durability.

Q5: What is LFQ in this product?
LFQ means lock forming quality, which is used when better forming performance is required for profiling, seam forming, and sheet fabrication.