Usually, the type of color steel plate coating is named after the top coat on the front of the steel plate. Ordinary polyester color steel plate is a metal baking paint color plate that is coated with PE polyester coating on the metal plate and then baked at high temperature.
Composition of 9 major structural layers
Top coat+primer on top and bottom, chemical film on top and bottom, coating on top and bottom, cold rolled substrate, and back paint
Detailed interpretation of structural layers
PE polyester topcoat: PE coatings have good adhesion to materials, color steel plates are easy to process and form, and there are many products with high cost performance, with a wide selection of colors and glosses;
Primer: beneficial for enhancing adhesion to the substrate and improving corrosion resistance;
Coating: Higher content of zinc or aluminum zinc has a significant impact on the service life of color steel plates;
Substrate: The performance of the cold rolled substrate determines the strength of the color steel plate;
Back paint: The use of back paint with different coating structures and thicknesses determines its corrosion resistance and purpose: composite board or single board.
