Product Overview
PPGL is manufactured using a 55% aluminum-zinc alloy coated steel substrate (galvalume), which offers 3–4 times better corrosion resistance than traditional galvanized steel of the same coating weight. The substrate is then coated with high-quality polyester or silicone-modified polyester paints. The unique Al-Zn alloy forms a protective barrier that prevents rust creep at cut edges, making PPGL the preferred choice for roofs, exterior walls, and agricultural buildings in humid or saline environments.
Key Specification
| Parameter | Range / Options |
|---|---|
| Base Material | 55% Al-Zn alloy coated steel (Galvalume) |
| Al-Zn Coating (double-sided) | AZ30 – AZ150 g/m² (factory standard AZ30 with ~25 g actual; AZ70–AZ150 for premium export) |
| Thickness (BMT) | 0.2 mm – 1.2 mm |
| Width | 914 / 1000 / 1200 / 1219 / 1220 / 1250 mm (max 1500 mm) |
| Paint System | Top: 5+15 μm or 5+20 μm; Back: 5–7 μm |
| Paint Types | PE (3–5 yrs), SMP (10–15 yrs), HDP (10–12 yrs) |
| Color | RAL standard or custom |
| Surface Finish | Standard spangle (small spangle) – galvalume naturally has a small, uniform spangle |
Core Advantages
Superior Cut-Edge Protection – The aluminum-rich alloy forms a dense oxide layer at sheared edges, preventing red rust propagation.
Heat Reflectivity – Reflects up to 80% of solar heat, reducing indoor temperatures and energy costs (2× better than galvanized steel).
High-Temperature Resistance – Withstands up to 300°C without discoloration or structural degradation.
Economic Efficiency – Lower density than pure zinc means more coverage area per ton for the same coating thickness (approx. 3% more area).
Applications
Building exteriors: Roofing, wall cladding for coastal factories, warehouses.
Agricultural: Grain silos, livestock barns, greenhouses (high humidity resistance).
Industrial: Oven liners, heat exchangers, chimney pipes.
Automotive: Exhaust system components, heat shields.
