Single-layer aluminum sheets are widely used in building curtain walls, and their surface PVDF coatings aluminium sheet are usually formed by a spray coating process or by a roll coating process. The former is to first process the aluminum plate into a structure containing ribs and lugs by a sheet metal processing process, and then perform a PVDF fluorocarbon coating. The roll coating plate is firstly coated with a PVDF fluorocarbon coating on the surface of the aluminum plate by a roll coating process, and then the coated plate is processed into a certain structure by a sheet metal processing process. This paper compares the application and performance differences between spray coating and roller coating in curtain wall.
PVDF spray and roll coated aluminum sheet for building curtain wall is made of pure aluminum series (1100, 1060), Al-Mn alloy (such as 3003) and Al-Mg alloy (5052, 5754 PVDF spray and roll coated aluminum sheet). The thickness of the spray plate and the alloy model can be selected according to the design needs, and are not limited by the process. Due to the characteristics of the roll coating process, the thickness of the roll coating is not more than 2.5 mm. The following 3D thick 3003 spray plate and 2.5 mm thick 5754 roll coated plate are used for comparative analysis.
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 ribs.
Therefore, many projects, especially high-rise structures and high-pressure areas, use 3mm thick sprayed aluminum plates (3003), such as Shanghai Central Plaza (170m high), Dalian Yunshan Building (210m high), and Shenzhen Airport. The use of pure aluminum plate in foreign countries, the thickness of 3mm ~ 4mm. Roll coated plate is suitable for low wind pressure conditions, such as low-rise buildings.