Color coated roll

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Color-coated coils are based on hot-dip galvanized sheets, hot-dip galvanized sheets, and electro-galvanized sheets. After surface pretreatment (chemical degreasing and chemical conversion treatment), one or several layers of organic coatings are applied on the surface, and then A product that is baked and cured. It is named after the colored steel coils coated with various colors of organic coatings, referred to as color-coated coils.

Overview of prepainted rolls

The color-coated steel strip using hot-dip galvanized steel strip as the base material is not only protected by the zinc layer, but the organic coating on the zinc layer plays a covering and protective role to prevent the steel strip from rusting, and its service life is longer than that of the galvanized strip, about 1.5 times.

Color coated roll use

Color-coated rolls are light, beautiful and have good anti-corrosion properties, and can be processed directly. The colors are generally divided into off-white, sea blue, and brick red. They are mainly used in advertising, construction, household appliances, electrical appliances, furniture, and transportation. Industry.

The coating used for color-coated coils should select 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.

Coating structure

coating structure type

2/1: Coat the upper surface twice, coat 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.

Use 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, the main

to be applied to sandwich panels;

2/1M: The back paint has better corrosion resistance, scratch resistance and formability, and has good adhesion

Suitable for single-layer profiled panels and sandwich panels.

2/2: The corrosion resistance, scratch resistance and processability of the double-layer back paint are better, and most of them are used for single

Laminated panels, but their poor adhesion, should not be used for sandwich panels.

Color coated roll substrate characteristics

Electro-galvanized substrate: the coating is thinner, and its corrosion resistance is not as good as that of hot-dip galvanized substrate;

Hot-dip galvanized substrate: The thin steel plate is immersed in a molten zinc tank to make a layer of zinc adhere to the surface. This galvanized sheet has good paint adhesion and 


Hot-dip galvanized substrate:

The product is plated with 55% AL-Zn and has excellent anti-corrosion performance. Its service life is more than four times that of ordinary galvanized steel sheets. It is the replacement 

product of galvanized sheet.


(1) It has good durability, and its anti-corrosion ability has a longer service life than galvanized steel sheets;

(2) It has good heat resistance and is less likely to change color at high temperatures than galvanized steel sheets;

(3) Has good heat reflectivity;

(4) It has processing performance and spraying performance similar to that of galvanized steel sheet;

(5) It has good welding performance.

(6) It has good performance-price ratio, durable performance and very competitive price. Therefore, whether it is architectural designers, 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.

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