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 coils (cold-rolled steel, galvanized steel, aluminum-coated steel, high-aluminum alloy steel, stainless steel, etc.). As these coils are coated at the metallurgical plant, they are ready for direct processing into products by the user, 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, formability, corrosion resistance, and decorative properties of organic polymers, along with 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 excellent practicality, decorative qualities, processability, and durability. There are numerous types of coated steel plates, exceeding 600 varieties, yet there is no unified classification method, as it's difficult to find a distinguishing standard among the vast array of 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 base material used, commonly used base materials for organic coated 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 technology, with different coating methods such as roller coating, spray coating, powder coating, lamination, and printing. They are also classified by the number of coatings and baking processes, including 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. Categorized by paint type, usually classified by paints used for organic coatings, including polyvinyl chloride coated steel plate, polyester coated steel plate, silicone polyester coated steel plate, 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, etc.
5. Categorized by special coatings and applications, such as epoxy zinc-rich coatings, organic coated steel plates based on cold-rolled steel sheets, velvet-coated steel plates, and some special machine-coated sandwich plates, including wood veneer panels, sandwich panels, vibration-resistant panels, etc.
