PPGI, the abbreviation of Pre-Painted Galvanized Steel, usually refers to color-coated galvanized steel sheets or color-coated galvanized steel coils. The classification of PPGI can be introduced in detail from multiple angles:

1. Classification by coating type

PPGI has various types of coatings, and different coatings give PPGI different properties and uses. Common types of coatings include:

Polyester (PE): has good formability and processability, suitable for general construction and industrial use.

Silicon-modified polyester (SMP): Silicon elements are added to polyester to improve the hardness and weather resistance of the coating, suitable for occasions with high requirements for weather resistance.

High weather-resistant polyester (HDP): has stronger weather resistance and UV resistance, suitable for long-term outdoor use, such as roofs, walls, etc.

Polyvinylidene fluoride (PVDF): has extremely high weather resistance and chemical corrosion resistance, bright and long-lasting colors, suitable for high-end buildings, home appliances and other fields.

2. Classification by coating structure

PPGI has a variety of coating structures. Common coating structures include:

Single-sided coating: only one side is coated with color paint, and the other side remains galvanized. It is suitable for occasions with low requirements for appearance.

Double-sided coating: both sides are coated with color paint, which is more beautiful and suitable for occasions with high requirements for appearance.

Multi-layer coating: one or more layers of intermediate coating are added between the substrate and the color paint to improve the adhesion and durability of the coating.

3. Classification by substrate material

PPGI's substrate material is mainly galvanized steel sheet (GI) or galvalume Steel steel sheet (GL). Different substrate materials also have a certain impact on the performance of PPGI:

Galvanized steel sheet (GI): It has good mechanical strength and corrosion resistance and is the most commonly used substrate material for PPGI.

Galvalume Steel sheet (GL): Aluminum is added on the basis of galvanizing to further improve the corrosion resistance of the substrate. It is suitable for occasions with higher requirements for corrosion resistance.

4. Classification by color
PPGI has rich and diverse colors and can be customized according to customer needs. Common colors include red, blue, green, white, gray, etc. PPGI of different colors can meet different aesthetic and decorative needs.

5. Classification by specifications
PPGI has various specifications, including different thicknesses, widths and lengths. The thickness is usually between 0.2mm and 1.2mm, the width can range from 800mm to 1250mm, and the length is customized according to customer needs. PPGI of different specifications is suitable for different application scenarios and processing needs.

In summary, PPGI can be classified from multiple angles such as coating type, coating structure, substrate material, color and specifications. These classification methods help meet the needs and application scenarios of different customers.