Z20-275 PPGI PPGL Ral Color Prepainted Galvanized Galvalume Steel
Coil
Color-coated coils are products made of hot-dip galvanized sheet,
hot-dip aluminum-zinc sheet, electro-galvanized sheet, etc. as
substrates. After surface pretreatment (chemical degreasing and
chemical conversion treatment), one or several layers of organic
coatings are applied on the surface, and then baked and cured. It
is named after the colored steel coils coated with various colors
of organic coatings, and is referred to as color-coated coils.
- Uses of color-coated coils
Color-coated coils are light, beautiful, and have good corrosion
resistance. They can also be directly processed. The colors are
generally divided into gray, sea blue, and brick red. They are
mainly used in advertising, construction, home appliance,
electrical appliance, furniture, and transportation.
The coating used for color-coated coils 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 the
purpose.
2/1: The upper surface is coated twice, the lower surface is coated
once, and baked twice.
2/1M: The upper and lower surfaces are coated twice each, and baked
once.
2/2: The upper and lower surfaces are coated twice each, and baked
twice.
- Uses of different coating structures
2/1: The corrosion resistance and scratch resistance of the
single-layer back paint are poor, but it has good adhesion and is
mainly used in sandwich panels;
2/1M: The corrosion resistance, scratch resistance and processing
formability of the back paint are good, and it has good adhesion
and is suitable for single-layer profiled panels and sandwich
panels.
2/2: The corrosion resistance, scratch resistance and processing
formability of the double-layer back paint are good, and most of
them are used for single-layer profiled panels, but its adhesion is
poor and it is not suitable for sandwich panels.
- Color coated coil substrate characteristics
| (1) Good durability, corrosion resistance and longer service life
than galvanized steel sheets |
| (2) Good heat resistance, less likely to change color at high
temperatures than galvanized steel sheets; |
| (3) Good heat reflectivity; |
| (4) Similar processing and spraying performance to galvanized steel
sheets; |
| (5) Good welding performance； |
| (6) Good performance-price ratio, durable performance and highly
competitive price. Therefore, whether it is architects, engineers
or manufacturers, galvanized steel sheets have been widely used in
industrial buildings, steel structures and civil facilities, such
as garage doors, gutters and roofs |
