Pre-Painted Galvalume® Steel Coil / Sheet / Plate (PPGL)
Huaxiao-Alloy’s Pre-Painted Galvalume® Steel combines 55% aluminum-zinc alloy substrate with precision-engineered polymer coatings – delivering 4-6x longer service life vs. standard PPGI. Engineered for extreme UV resistance, cut-edge protection, and thermal stability (≤340°C), it redefines durability for roofing, façades, HVAC, and automotive applications.
1. PRODUCT SPECIFICATIONS & ARCHITECTURE
Base Material Specifications
| Parameter | Specification | Standard |
|---|---|---|
| Substrate | Galvalume® (55% Al-43.4% Zn-1.6% Si) | ASTM A792/A875 |
| Coating Mass | AZ60/AZ90/AZ135 (60-135 g/m²) | EN 10346 |
| Thickness Range | Coil: 0.3-2.0mm (±0.03mm) | JIS G 3321 |
| Width Range | Coil: 600-1,600mm (±0.5mm) | ISO 9444 |
| Surface Finish | Regular Spangle (R), Minimized Spangle (M) | ASTM A924 |
Coating System Structure
1. Galvalume® Steel Substrate (Al-Zn-Si alloy layer)
2. Chromate-Free Conversion Coating (Zr/Ti nano-layer)
3. Primer (5-8µm): Epoxy/Polyester/Polyurethane
4. Topcoat (18-25µm): PVDF/SMP/Fluoropolymer
5. Clear Coat (Optional): Anti-Graffiti/UV Filter
Total Dry Film Thickness: 23-35µm (±2µm)
2. COATING PERFORMANCE MATRIX
| Topcoat Type | Gloss (%) | ΔE (10y) | Salt Spray (hrs) | QUV Resistance | Max Temp |
|---|---|---|---|---|---|
| Polyester (PE) | 20-80 | ≤5.0 | 1,000+ | 1,500h | 100°C |
| SMP (Silicone Modified Polyester) | 15-50 | ≤3.0 | 1,500+ | 3,000h | 120°C |
| PVDF (70% Kynar®) | 10-40 | ≤2.0 | 2,000+ | 4,000h | 140°C |
| FEVE Fluoropolymer | 40-90 | ≤1.5 | 3,000+ | 6,000h | 180°C |
Testing Standards: ΔE (ASTM D2244), Salt Spray (ASTM B117), QUV (ASTM G154 Cycle 4)
3. MECHANICAL & PHYSICAL PROPERTIES
| Property | Test Method | PPGL-AZ90/PVDF | PPGL-AZ135/SMP |
|---|---|---|---|
| Adhesion (Cross-Cut) | ASTM D3359 | 5B | 5B |
| Pencil Hardness | ASTM D3363 | 2H-3H | H-2H |
| Impact Resistance | ASTM D2794 | 100 kg·cm | 80 kg·cm |
| T-Bend Flexibility | ASTM D4145 | 0T | 1T |
| Solar Reflectance | ASTM E903 | 82% (White) | 78% (Light Gray) |
| Thermal Emittance | ASTM E408 | 0.85 | 0.82 |
4. STANDARD PRODUCT RANGE
Architectural Grades (AAMA 2605 Certified)
| Product Code | Topcoat | Substrate | Thickness | Features |
|---|---|---|---|---|
| PPGL-AP | PVDF | AZ90 | 0.5-1.2mm | Cool Roof (CRRC), LEED Credits |
| PPGL-SMP | SMP | AZ135 | 0.4-1.0mm | Anti-Microbial, Texture Finish |
| PPGL-FEVE | FEVE | AZ60 | 0.3-0.8mm | Self-Cleaning, High Gloss |
Industrial Grades
| Product Code | Topcoat | Substrate | Special Properties |
|---|---|---|---|
| PPGL-EC | Conductive Epoxy | AZ90 | EMI Shielding (40-60 dB) |
| PPGL-FR | Intumescent | AZ135 | Fire Rating (ASTM E84 Class A) |
| PPGL-CA | Chemical-Resistant PU | AZ90 | Acid/Alkali Resistance (ISO 2812) |
5. INDUSTRY-SPECIFIC SOLUTIONS
| Sector | Application | Huaxiao Solution | Certifications |
|---|---|---|---|
| Building Envelope | Metal Roofing, Wall Panels | PPGL-AP (PVDF) | AAMA 2605, FM 4471 |
| HVAC & Ductwork | Air Handling Units | PPGL-SMP (Anti-Microbial) | SMACNA, NSF/ANSI 51 |
| Transportation | RV Siding, Trailer Interiors | PPGL-FEVE | GMW14872, SAE J2334 |
| Appliances | Oven Cabinets, Range Hoods | PPGL-HG (High-Gloss PE) | IEC 60335, UL 858 |
6. HUAXIAO-ALLOY ADVANTAGES
Coating Science Leadership
- Color Consistency: ΔE≤0.8 batch-to-batch (HunterLab Spectrophotometry)
- Edge Protection: Laser-sealed cut edges + proprietary EdgeSeal™ coating
- Sustainable Chemistry: Zero Cr(VI), VOCs ≤50g/L (EU Directive 2004/42/CE)
Precision Manufacturing
- In-line coil coating (180 m/min) with IR/UV curing
- 5-stage pretreatment (alkaline clean → rinse → nano-conversion → rinse → seal)
- Automated defect detection (AOI with 5μm resolution)
Global Compliance & Support
- Certifications: QUALICOAT Class 3, GSB International, NCCA
- Digital Tools: Color matching app, weathering prediction software
- Technical Support: On-site forming/welding training
FAQs: Pre-Painted Galvalume® Steel Coil / Sheet / Plate (PPGL)
A: Galvalume’s 55% Al-content provides superior cut-edge protection – salt spray resistance >1,500hrs vs. 600hrs for PPGI. Al₂O₄ barrier prevents underfilm corrosion.
A: Use reverse-bend technology primers with >10% elongation. Huaxiao’s FlexiCoat™ system achieves 0T bend at R/t=0.5.
A: PVDF coatings maintain ΔE≤2 after 10 years Arizona exposure (AAMA 2605 data). SMP (ΔE≤3) is cost-effective alternative.
A: 1) Low-pressure wash (<100 bar) 2) pH-neutral cleaners 3) Non-abrasive cloths. Download Huaxiao’s MTC-04 maintenance guide.
A: 15 MT per color with ΔE≤1.0 guarantee (spectrophotometer report included).
A: 25-year warranty against chalking/fading (ΔE≤5) when installed per Huaxiao’s AMI-2024 guidelines.
A: Class A fire-rated panels available with intumescent coatings (ASTM E84 flame spread ≤25).
Pre-Painted Galvalume® Steel Coil / Sheet / Plate (PPGL)
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