In building wall decoration, aluminum veneer decoration has many advantages that other materials do not have. Firstly, the board surface modeling can be customized according to the engineering drawings, and the surface color can also be modulated according to the preferences of customers. The baking paint of aluminum veneer curtain wall ceiling products is not only an important key to the decoration effect, but also directly affects the product life. Previously, we have introduced the types of aluminum decorative materials baking paint, as well as the reasonable construction site and life. Today, I will continue to explain about the baking process of aluminum plate and the thickness of several national standards. As we all know, the quality of the paint layer has a great impact on the life of aluminum plate decoration materials. After all, no matter how good the modeling and decoration is, if the color fades, the paint will become very ugly.
First of all, let's learn about several surface baking technology and coating materials of aluminum alloy decorative plate, the most commonly used are the following three kinds: "powder spray or paint, polyester powder or paint, fluorocarbon powder or paint". If you choose different coating process, you can't distinguish the difference by naked eyes. The only difference is that the service life is different. Of course, the cost is also different. Please choose according to the project demand and cost. As for the thickness of paint layer, in fact, many customers often fall into a misconception that the thicker the paint is, the better it is. In fact, even if the paint quality is OK, if the paint layer is too thick or too thin, it will affect the quality of aluminum veneer in the long run.
We use mm (mm) as the unit for aluminum plate, and um micron is used for surface coating.
The average coating thickness of powder baking varnish aluminum veneer and two coating fluorocarbon aluminum veneer is required to be about 30 μ m, and the local minimum thickness is not less than 25 μ M. The average thickness of polyester spraying aluminum veneer is 25 μ m, and the local minimum thickness is 20 μ M. The average value requires more than 5 measurements.
The above parameters are from the national standard GB / t23443-2009 architectural decorative aluminum veneer. Many coating plants with poor technology often fail to meet the above standards in thickness, and ordinary users do not have good inspection methods, resulting in the impact of aluminum veneer life and decoration effect.
As I said earlier, too thick paint coating is not good. If the paint layer of aluminum veneer is too thick, first of all, the surface adhesion will be reduced, and in the baking process, the coating can not fully melt into the aluminum plate.
There is no big problem in the initial construction of this kind of aluminum veneer, but after a few years of use, the coating may fall off and bulge. Especially in coastal areas, due to the air humidity and salt content of sea water, the board with poor paint coating is prone to oxidation, which makes this problem more obvious.
These problems are the problems that customers need to pay attention to before purchasing, but they are easy to ignore.
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