Aluminum veneer fluorocarbon spraying process is as follows: aluminum degreasing decontamination → washing → caustic (degreasing) → washing → pickling → washing → chrome → washing → pure water washing fluorocarbon spraying process: spray primer → Finish → varnish → baking (180-250 ℃) → quality inspection.
Multi-layer fluorocarbon spraying process with three spraying (referred to as three spray), spray the top paint, top coat and varnish and secondary spray (primer, top coat).
1 pre-treatment purposes
Prior to fluorocarbon coating of aluminum profiles and plates, the surface of the workpieces should be de-oiled and chemically treated to produce a chromated film to increase the cohesion and oxidation resistance of the coating and metal surfaces, which in turn will prolong the use of the paint film Years.
2 primer coating
As a closed substrate primer coating, its role is to improve the coating anti-infiltration capacity, enhance the protection of the substrate, stabilize the metal surface layer, to enhance the adhesion of the topcoat and the metal surface, you can ensure the color of the topcoat coating Evenness, paint thickness is generally 5-10 microns.
3 finish coating
Topcoat is a key layer of fluorocarbon spray coating, is to provide aluminum decorative colors needed to achieve the appearance of aluminum design requirements, and to protect the metal surface from the external environment, air pollution, acid rain, prevent UV penetrate. Greatly enhance the anti-aging ability, topcoat coating is the thickest layer of fluorocarbon spray paint, paint thickness is generally 23-30 microns.
4 varnish coating
Cover varnish coating, also known as varnish coating, the main purpose is to more effectively enhance the resistance to external erosion of the paint layer to protect the finish coating to increase the color metallic finish, the appearance of a more vibrant colors, dazzling, coating thickness It is generally 5-10 microns. Trifluoro carbon spray coating the total thickness of 40-60 microns, special needs can be thickened.
5 curing treatment
Fluorocarbon spray coating generally require secondary curing, aluminum into the curing furnace, the curing temperature is generally between 180 ℃ -250 ℃, curing time is 15-25 minutes, different fluorocarbon paint manufacturers, will be based on their own paint, Provide the best temperature and time. Fluorocarbon spraying plant (Soymilk) Some also according to their own experience to three spray when the two curing changed to a curing.
6 quality inspection
Quality inspection should be AAMA-605.02.90 standard. Strict quality inspection to ensure high-quality spray products.
Single-layer aluminum veneer is widely used in the construction of curtain wall, the surface PVDF fluorocarbon coating is usually formed by spraying process, but also by roller coating process. The former is the first through the sheet metal processing technology to light aluminum plate processed with ribs and mounting ears structure, and then PVDF fluorocarbon coating. The roll coating is the first roll coating process on the surface of the aluminum roller PVDF fluorocarbon coating, and then through the sheet metal processing technology to the coating plate processed into a certain structure.
