Color-coated coils use hot-dip galvanized sheets, hot-dip galvalume sheets, electro-galvanized sheets, etc. as substrates. After surface pretreatment (chemical degreasing and chemical conversion treatment), one or several layers of organic coatings are coated on the surface, and then A product that is baked and solidified. Colored steel coils are named after being coated with organic coatings of various colors, referred to as color-coated coils.
The Chinese name of color coated coils and the foreign name of PPGI (Prepainted galvanized steelcoils) are also known as color steel plates in the industry, color plate type building materials
Color coated coil substrate classification:
▪ Hot-dip galvanized base plate
▪ Hot dipped aluminum zinc substrate
▪ Electro-galvanized substrate
Color coated coil coating types:
▪ Polyester
▪ Silicon modified polyester
▪ High durability polyester
▪ Polyvinylidene fluoride
ppgi uses hot-dip galvanized steel strip as the base material. In addition to the protection of the zinc layer, the organic coating on the zinc layer plays a covering and protective role to prevent the steel strip from rusting and has a longer service life than the galvanized strip. About 1.5 times.
Color coated roll uses:
Color-coated rolls are lightweight, beautiful and have good anti-corrosion properties, and can be processed directly. The colors are generally divided into gray and white, sea blue and brick red. They are mainly used in the advertising industry, construction industry, home appliance industry, electrical appliance industry, furniture industry and transportation. Industry.
The coating used for color-coated rolls selects appropriate resins according to different use environments, such as polyester silicon-modified polyester, polyvinyl chloride plastisol, polyvinylidene chloride, etc. Users can choose according to their usage.
Coating structure type:
2/1: Coat the upper surface twice, the lower surface once, and bake twice.
2/1M: Coat the upper and lower surfaces twice and bake once.
2/2: Coat the upper and lower surfaces twice and bake twice.
vUses of different coating structures:
2/1: The single-layer back paint has poor corrosion resistance and scratch resistance, but has good adhesion.
To be applied to sandwich panels;
2/1M: The back paint has good corrosion resistance, scratch resistance and processability, and has good adhesion.
It is suitable for single-layer profiled panels and sandwich panels.
2/2: The double-layer back paint has good corrosion resistance, scratch resistance and processability, and is mostly used for single
Laminated board, but its adhesion is poor and it is not suitable for sandwich panels.
