Characteristics and application fields of color-coated coils

1. Definition and characteristics of color-coated coils
Color-coated coils, also known as color-coated steel plates or color plates, are plates obtained by using cold-rolled steel strips and galvanized steel strips (electrogalvanized and hot-dip galvanized) as substrates on continuous units, after surface pretreatment (degreasing and chemical treatment), and by roller coating, applying one or more layers of liquid coatings, and baking and cooling.
Color-coated coils have many excellent characteristics. They are brightly colored, can maintain color stability for a long time, are not easy to fade, have good decorative effects, and can meet the diverse color needs of different buildings and designs. At the same time, it also has excellent corrosion resistance, whether in humid coastal areas or areas with severe industrial pollution, it can effectively resist corrosion and extend its service life. In addition, the surface of the color-coated coil is smooth, easy to clean, and has a certain scratch resistance, keeping the appearance neat and beautiful. In terms of processing, it has good flexibility and processing performance, and can be bent, stretched, stamped and other processing operations according to specific needs to meet various complex modeling and construction requirements.
2. Production process of color-coated coils
The pretreatment link is crucial. The substrate is first cleaned to remove oil, dust and impurities on the surface, and then a chemical conversion film treatment is performed, such as phosphating treatment, so that a uniform and delicate phosphating film is formed on the surface of the substrate to improve the adhesion and corrosion resistance of the coating.
The coating process uses advanced roller coating technology to evenly apply the liquid coating on the surface of the substrate. The coating is divided into different levels such as primer, topcoat and backcoat. The primer mainly provides good adhesion and anti-corrosion performance, the topcoat gives the color-coated coil rich colors and appearance effects, and the backcoat is used to protect the back of the substrate. During the coating process, the uniformity and quality stability of the coating are ensured by controlling factors such as the viscosity of the coating, the coating speed and the drying conditions.
In the curing stage, the coated substrate enters the baking chamber and is cured and dried under certain temperature and time conditions to evaporate the solvent in the coating to form a solid coating. The curing temperature and time are adjusted according to the type of coating and the characteristics of the substrate to ensure that the coating has good performance. Finally, after cooling, winding and other processes, the production process of color-coated coils is completed.
3. Application fields of color-coated coils
The construction field is one of the main application markets for color-coated coils. In terms of building roofs, color-coated coils are an ideal choice for roofing materials due to their rich colors and excellent weather resistance. They can not only meet the functional requirements of waterproofing and sun protection, but also add a unique appearance charm to the building. In wall applications, color-coated coils can be used for the decoration and enclosure of building exterior walls, such as curtain walls of high-rise buildings and exterior walls of industrial plants. Their good corrosion resistance and easy cleaning properties enable them to maintain a good condition under various environmental conditions. In addition, color-coated coils are also widely used in building components such as doors, windows, eaves, and awnings, which improves the overall quality and beauty of the building.
The home appliance industry is also an important application field for color-coated coils. In the manufacture of the outer shells of home appliances such as refrigerators, washing machines, and air conditioners, the use of color-coated coils can not only provide good protection to prevent rust and corrosion of the electrical housing, but also give the product a stylish and beautiful appearance, meeting consumers’ increasing requirements for the appearance of home appliances. Its diversity of colors and rich surface texture provide more possibilities for the design and innovation of home appliances.