Coated sheets, also known as organic coated sheets or pre-painted steel coils, are made by applying or lamination various organic coatings or plastic films to the surface of metal rolls (cold-rolled steel, galvanized steel, aluminum-coated steel, high-aluminum alloy steel, stainless steel, etc.). As they are finished with surface coating in metallurgical factories, they can be directly processed into products by users, hence also referred to as pre-painted coils.
Coated steel plates combine the benefits of both organic polymers and steel plates, offering the excellent coloring, molding, corrosion resistance, and decorative properties of organic polymers, as well as the high strength and ease of processing of steel plates, allowing for easy stamping, bending, deep drawing, and welding. This results in products made from organic coated steel plates that possess superior practicality, aesthetics, workability, and durability. There are numerous types of coated steel plates, exceeding 600, but there is no unified classification method, as it is difficult to find a distinguishing standard among the various types. Moreover, each manufacturer has its unique equipment and processes, leading to a wide variety of product types. Classification is currently done according to general conventions.
1. Categorized by the substrate used, common substrates for organic coating steel plates include cold rolled steel, galvanized steel, electro-galvanized steel, alloy steel, zinc-aluminum plated steel, electro-galvanized alloy steel, tin-plated steel, chrome-plated steel, and aluminum plates, etc.
2. Organic coated steel sheets are categorized by processing techniques, including roller coating, spray coating, powder coating, lamination, and printing methods. They are also classified by the number of coatings and baking processes, such as one-coat-one-bake, two-coat-two-bake, three-coat-three-bake, and four-coat-four-bake. Additionally, they can be further divided into wood grain, marble, leather grain, and cement mortar patterns based on embossing or printing processing.
3. Classified by paint type, typically categorized by paints used for organic coatings, including polyvinyl chloride coated steel plates, polyester coated steel plates, silicone polyester coated steel plates, etc.
4. Categorized by coating performance, including high weather-resistant coating panels, high-temperature-resistant coating panels, self-extinguishing coating panels, sterilization coating panels, non-stick snow coating panels, anti-fingerprint coating panels, and self-lubricating coating panels, among others.
5. Categorized by special coatings and applications, including epoxy zinc-rich coatings, organic coated steel plates based on cold-rolled steel sheets, velvet-coated steel plates, and some special machine-coated composite plates such as veneer board, sandwich panels, and vibration-proof panels, etc.
