Detailed explanation of the production process of color coated steel coil

Color-coated steel coil is a kind of building material which is surface-treated and coated with an organic coating, and then baked and cured. It is widely used in construction, home appliances, transportation, furniture and other industries. This article will introduce the production process of color-coated steel coil in detail.

Substrate selection

The substrates of color-coated steel coils mainly include cold-rolled steel sheets and galvanized sheets. When selecting the substrate, it is necessary to consider its performance characteristics, thickness, flatness and other factors to ensure the quality and use effect of the color-coated steel coil.

surface treatment

The substrate is first surface prepared to prepare it for the next step of coating. The surface treatment process includes degreasing, pickling, alkali washing, phosphoric acid treatment and other processes. These processes can effectively remove impurities such as dirt and iron scale on the surface of the substrate, while improving the adhesion and corrosion resistance of the substrate surface.

coating production

After surface preparation, the substrate needs to be sent to the coating line for coating. The production process of the coating includes three links: primer, top coat and varnish. In the primer coating process, epoxy, polyester and other primers are generally used for coating. In the top coating process, it is mainly about the selection of colors and the treatment of appearance effects. PVDF, PE, HDP and other resins are used as coating materials to make the color-coated steel coils have different colors and gloss on the surface. The varnish link is mainly to increase the gloss of the coating and improve the antifouling performance.

to solidify

After the coating is completed, the color-coated steel coil needs to be baked and cured. During the baking and curing process, the color-coated steel coil is sent into a high-temperature oven, and different temperatures and times are set according to the selected materials. Through curing, the coating material can be fully reacted and cross-linked, thereby improving the performance indicators of the color-coated steel coil such as weather resistance, hardness and adhesion.

cutting and packaging

After the above-mentioned technological process, the color-coated steel coil needs to be cut and packaged after being made. Cutting is mainly to cut the color-coated steel coil into the required size according to customer needs and product specifications. Packaging is to pack the cut color-coated steel coils to avoid external pollution and damage.

In short, the production process of color-coated steel coils requires fine operation and multi-channel process control after surface treatment, coating production, baking and curing, cutting and packaging. Only by making full preparations in base material selection and production process, and strictly following the standard operation, can we produce high-quality color-coated steel coil products with excellent performance and meet customer needs.