The standard for measuring the performance of fluorocar […]
The standard for measuring the performance of fluorocarbon coating on the surface of single-layer aluminum sheets commonly used at home and abroad is the American Building Manufacturers Association AAMA605.2 specification. This standard was developed for the spray process. There are no general technical specifications for fluorocarbon coatings formed by the roll coating process because they are rarely used. China's industry standard "Technical Specifications for Fluorocarbon Coating on Surfaces of Aluminum and Aluminum Profiles" is equivalent to the AAMA 605.2 specification, which is also formulated for the spraying process.
The roll coating is thinner than the spray plate. The roll coating production line is generally two-coated or two-baked or one-baked. According to the characteristics of the roll coating process, the coating thickness of the roll coating is less than 251xm. The thin coating will reduce its UV resistance and wind erosion resistance. In order to achieve a thickness of 401 xm, the roll coated sheet had to be coated twice (for example, four coats and four bakes), and the aluminum roll was passed twice through the roll coating line. Thus, the molecular binding force between the layers is lower than that of the intralayer molecules, and the external small molecules are easily diffused along the layer to corrode the coating and the substrate.
In the curtain wall structure, the rigidity of the aluminum plate is very important, because the damage form of the aluminum plate in the curtain wall structure is not broken, but whether the aluminum plate has sufficient rigidity to resist deformation caused by the external load, and in the case where the division is determined, the aluminum plate is The rigidity depends on the thickness of the aluminum plate and the structure of the rib