Product Introduction

PPGI (Pre-Painted Galvanized Steel) is a composite steel material, where cold-rolled or galvanized steel coils are coated with multi-layer organic coatings. These coatings include a primer, topcoat, and backcoat, providing both the strength of steel and the weather resistance and aesthetic properties of polymer materials. The typical coating thickness ranges from 15 to 25μm. Custom colors and textures such as solid colors, wood grain, and stone grain are available, making it ideal for various construction, appliance, and transportation applications.

Production Process

The production of PPGI coils involves several stages:

• Substrate Preparation: Choose cold-rolled or galvanized coils to ensure a clean, flat surface.
• Pre-treatment: Includes degreasing using alkaline solutions and chemical conversion (phosphatization or chromatization) to enhance coating adhesion.
• Coating: Roller coating with epoxy primer and polyester/fluorocarbon topcoat applied to both sides of the coil.
• Baking and Curing: Baking at high temperature to cross-link the coatings, forming a dense protective layer.
• Post-processing: Embossing, laminating, or cutting to custom dimensions based on customer requirements.

Specifications Parameters

Application Scenarios

• Corrosion Resistance: Galvanized substrate with organic coating provides dual protection, with salt spray resistance exceeding 1000 hours.
• Decorative: Rich color options, including matte, high gloss, and various textures such as wood grain and stone grain.
• Processing: Compatible with bending, stamping, welding, making it ideal for complex molding needs in construction, home appliances, and more.
• Lightweight: Thickness ranges from 0.3mm to 1.2mm, offering 60-80% weight reduction compared to traditional stone and glass.
• Environmental Protection: Chrome-free pretreatment and water-based paint processes reduce environmental impact.

Interactive Q&A