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Core Factors in Selecting the Thickness of PPGI Color Coated Coil
When purchasing PPGI color-coated coils, the thickness selection directly affects service life and cost-effectiveness. 0.3mm and 0.5mm are common household specifications, each with its own advantages: the former is lightweight and economical, while the latter is more durable and impact-resistant.
I. Basic Definitions of PPGI and PPGL Color Coated Coil
PPGI (Pre-Painted Galvanized Iron) and PPGL (Pre-Painted Galvanized Steel) color-coated coils are steel products that undergo a continuous hot-dip galvanizing process followed by a multi-layer organic coating on the surface. Their core structure includes:
- Substrate layer: cold-rolled steel sheet or hot-dip galvanized steel sheet
- Conversion layer: A chemical treatment layer that enhances coating adhesion.
- Primer layer: Epoxy resin or polyester resin-based anti-corrosion coating
- Topcoat layer: Weather-resistant coating such as PVDF or PE
II. Comparison of Thickness Parameters and Technical Performance
III. Home Scenarios Selection Guide
Recommended scenarios for 0.3mm specification:
- Interior decorative ceilings/partitions
- lightweight storage cabinets
- temporary construction site fencing
- projects on a budget
Necessary scenarios for 0.5mm specification:
- Outdoor roof/wall
- load-bearing structural components
- High wind pressure areas
- Facilities that need to be used for a long time
IV. Key Indicators for Procurement Decisions
Besides thickness, other factors to consider when purchasing PPGI color-coated coils include:
- Zinc coating weight: The zinc coating weight on both sides should be ≥60g/m² (compliant with ASTM A653 standard).
- Coating system: PVDF coating has better weather resistance than PE coating.
- Color difference control: ΔE≤1.5 (measured using a spectrophotometer)
- Environmental certifications: RoHS, REACH, and other hazardous substance restriction directives
V. Common usage misconceptions
Myth 1: The thicker the better.
In reality, exceeding the specified thickness leads to material waste and structural overload. For example, 0.5mm boards used for interior decoration cost 40% more than 0.3mm boards, but the performance improvement is not significant.
Myth 2: Ignoring the substrate material
For PPGI rolls of the same thickness, the corrosion resistance of DX51D+Z substrate is 3 times higher than that of SPCC substrate. It is recommended to choose hot-dip galvanized substrate (GI) instead of electro-galvanized substrate (EG).
VI. Why choose Maxwell Steel?
As a professional steel manufacturer, we offer:
- Manufactured strictly in accordance with JIS G3302 and EN 10169 standards.
- Thickness tolerance is controlled within ±0.02mm.
- Supports customized coating colors and textures
- Free technical consultation and sample services are available.
Contact our engineering team now to get a PPGI/PPGL color coated coil selection solution tailored to your specific project.
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