Color coated steel plate classification
According to different structures, color coated steel plates can be roughly divided into the following categories.
(1) Coated steel plate
The coated steel plate is made of galvanized steel plate as the base, and the front and back sides are coated to ensure its corrosion resistance. The first layer on the front is a primer, usually an epoxy primer, because it has strong adhesion to the metal, and the back is also coated with epoxy resin or acrylic resin; the second layer (surface layer) used to use alkyd resin, generally used Polyester paint or acrylic resin paint.
(2) PVC steel plate
There are two types of PVC steel plates, one is produced by the method of coating paste PVC, called coated PVC steel plate; the other is formed and printed or embossed PVC film is pasted on the steel plate, called film PVC steel plate.
The PVC layer is thermoplastic, and the surface can be thermally processed, such as embossing, which can enrich the surface texture, and it is also flexible, which can be subjected to secondary processing such as bending, and its corrosion resistance is also relatively good.
The disadvantage of the PVC surface layer is that it is easy to age. In order to improve this shortcoming, a new type of composite PVC steel plate with acrylic resin composited on the surface of PVC has been produced.
(3) Thermally insulated coated steel sheet
The thermal insulation coating steel plate is to paste 15-17mm thick polystyrene foam plastic or rigid polyurethane foam plastic on the back of the color coated steel plate, which can be used to improve the thermal insulation and sound insulation performance of the coated steel plate.
(4) High durability coated steel plate
According to the good aging resistance of fluoroplastics and acrylic resins, the use of high-durability coated steel sheets on the surface of steel sheets can improve the durability and corrosion resistance of steel sheets.
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