ALUSIGN aluminum composite sheets has the advantages of light weight, beautiful appearance, waterproof, weather resistance and easy processing. It has been widely used in various fields such as construction, interior decoration and facade decoration. The production of ALUSIGN aluminum composite panel mainly includes chemical conversion and painting. The production lines of several processes, such as compounding and trimming, form a complete production system after packaging.
There are many production processes for aluminum composite sheets. According to the composite process of plastic core panels and two-sided aluminum panels, it can be divided into cold recovery and thermal recovery; it can also be divided into continuous correction and intermittent correction.
The process for producing aluminum plastic panels is first to clean the aluminum coil. Due to the needs of the process, the aluminum coil is coated with lubricant and anti-oxidant on the surface, and some dirt is also attached during transportation, which will affect its adhesion and must be cleaned. Can also be divided into continuous correction and intermittent correction.
After cleaning and chemical treatment of the aluminum coil, a dense chemical protective film is formed on the surface; this chemical film can improve the oxidation resistance of the aluminum coil and prolong the life of the paint film.
The general process of cleaning is as follows: aluminum coil→spray degreasing→water washing→neutralization→chemical treatment→water washing→drying→cooling→winding. The cleaned aluminum coil is fed to a coater and coated with a high functional fluorocarbon resin on the outer surface of the aluminum coil. The process is as follows: aluminum coil→feeding→coating fluorocarbon coating→hot air reheating paint→cooling→filming→cutting→winding
The panels of the exterior aluminum composite panel are coated with two layers of paint and primer. The topcoat of the façade is a highly weather-resistant fluorocarbon resin coating, namely polyvinylidene fluoride (PVDF). Its excellent UV resistance and environmental pollution keep the surface of the protected aluminum coil beautiful.
The surface of the aluminum composite sheet can not only have the brilliance of metal, but also the marble pattern and color of the splendid. Fluorocarbon coatings are usually applied to aluminum coils by roll coating and then dried by high temperature baking. The equipment is produced continuously, first with primer, then with top coat, and finally with a surface varnish. The total thickness of the three-layer paint is up to 30μm. Each layer of paint needs to be baked at 200 °C for about 60s to make it dry. After the oven is baked, it is quickly cooled by an air cooler.