The traditional coating is divided into several categories, and the most high-end is fluorocarbon coating, which can be anticorrosive for almost 20 years. Generally distributed in the form of rolls from steel mills to various places. The color steel plate we often see refers to the processed plate, the thickness is about 50~100mm, and it is composed of the middle filler and the color steel plate on both sides. Among them, the thickness of the color plate is 0.4mm, 0.5mm, 0.6mm and other different thickths, and the middle layer can be polyurethane, rock wool or foam. Because of the special profiles, the plant built with color steel plates is built very fast (such as Xiaotangshan Hospital during SARS), but the strength is low. The substrate of color coated steel plate is cold-rolled substrate, hot-dip galvanized substrate and electroplated zinc substrate. The types of coatings can be divided into polyesters, silica-modified polyesters, polydifluoroethylene and plastisol. The surface state of color coated steel plate can be divided into coating plate, embossing plate and printing plate.

Color coated board, also known as coated board, is a metal coil as the substrate, coated or laminated on the surface of a variety of organic coatings or plastic film made of building materials, color coated board substrate types are mainly:

1, cold-rolled substrate color coated steel plate

The color plate produced from the cold-rolled substrate has a smooth and beautiful appearance, and has the processability of cold-rolled plate; However, any small scratches in the surface coating will expose the cold-rolled substrate to air, which will quickly cause red rust in the exposed iron. Therefore, such products can only be used for temporary isolation measures and indoor materials that are not highly demanding.

2, hot-dip galvanized color coated steel plate

The product obtained by applying organic coating on hot-dip galvanized steel sheet is hot-dip galvanized color coated sheet. In addition to the protective effect of zinc, the organic coating on the surface also plays a role in isolating protection and preventing rust, and the service life is longer than that of the hot galvanized sheet. The zinc content of hot-dip galvanized substrate is generally 180g/㎡ (double-sided), and the maximum galvanizing amount of hot-dip galvanized substrate for external construction is 275g/㎡.

3, hot plating aluminum zinc color coated plate

The organic coating is coated on the hot plated aluminum zinc plate to obtain the product is hot galvanized color coated plate, in which the aluminum zinc content of the hot plated aluminum zinc plate is 55%AI-Zn and 5%AI-Zn.

4, electric galvanized color coated plate

Electrogalvanized plate as the substrate, coated with organic coating baking products for electrogalvanized color coated plate, because the zinc layer of electrogalvanized plate is thin, usually contains zinc content of 20/20g/m2, so the product is not suitable for use in outdoor production of walls, roofs, etc. However, because of its beautiful appearance and excellent processing properties, it can be mainly used for household appliances, audio, steel furniture, interior decoration and so on.

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