Metal sheet curtain wall have been in application for decades. There are three materials still in use, including aluminum veneers, aluminum composite panels, and aluminum honeycomb panels. Among the three materials, the most commonly used are aluminum veneers and aluminum composite panels.
The appearance of aluminum veneers were the earliest, and later in the late 1960s and early 1970s, aluminum composite panels were invented in Germany and quickly became popular around the world. What is the difference between aluminum composite panels and aluminum panels? Here I make a simple comparison of these two materials.
Aluminum veneer generally adopts 2-4mm thick AA1100 pure aluminum plate or AA3003 aluminum alloy plate. Aluminum composite board generally adopts 3-4mm three-layer structure, including upper and lower two 0 .5mm sandwiched between PVC or PE.
We can see from the material that the cost of aluminum composite panels is definitely much lower than that of aluminum veneers. The current market is probably 4mm thick composite board is lower than the price of 2.5mm thick 120 yuan / square or more, a 10,000 square project, the use of aluminum composite panel will be lower than the use of aluminum veneer to reduce the cost of 1.2 million yuan.
At present, there are two kinds of aluminum veneers in the world, such as fluorocarbon sprayed aluminum veneers and roller coatings. The processing process of veneers here is mainly about the production of fluorocarbon coating. Spraying aluminum sheets is divided into two major steps: the first step is sheet metal processing.
This process is mainly to process the aluminum veneer into the shape and size required for construction by cutting, folding, bending, welding and grinding the flat plate.
The second step is spraying. Spraying is to spray paint on the processed sheet metal. There are two types of spraying, one is manual spraying and the other is machine spraying. Machine spraying is generally only suitable for regular flat plates, but this kind of aluminum veneer is used less in actual use, and manual spraying is adopted by most domestic manufacturers.
Manual spraying is a dangerous job because the paint is highly volatile and toxic, and it is easy to cause chronic benzene series poisoning, which seriously affects people’s health. One of the great advantages of manual spraying is that regardless of the amount of color, the color can be optional, and the roll coating of the aluminum composite panel must reach a certain amount before processing.
The processing process of aluminum composite sheet is more complicated than that of aluminum single panel, mainly consisting of four processes of forming, painting, compounding and trimming. These four processes are automated except for trimming.
It can be seen from the processing process that the aluminum composite material has certain advantages in environmental protection and safety. Coupled with the simple process of sheet metal addition of aluminum veneers, some private workshops have begun to get involved, seriously affecting the stability of the market quality of aluminum veneers.
The construction process of aluminum composite panels and aluminum veneers is generally the same. The biggest difference is that the acm panel is processed into the required shape and specifications at the construction site, and has a large degree of construction freedom. The aluminum veneer is processed and formed by the factory.
Due to the accuracy of the domestic equipment, there are often some small troubles in the construction process. In addition, in terms of the warranty period of the construction process, the mass production of acp sheet is much faster than the production of aluminum veneers, and the schedule of the construction schedule is also higher.
This problem has been debated for a long time, people really think that the aluminum veneer is pure aluminum, and the conductivity is better. In response to this problem, Germany’s ALUSUISSESINGEN GMBH made a lightning-proof test of two materials in a military laboratory in Munich, Germany.
The results show that in the case of instantaneous impact during lightning strikes, the curtain wall connection method currently used, whether it is aluminum composite panel or aluminum single panel, can be completely protected against lightning strikes; in the case of continuous current of lightning strikes, in the metal plate or metal surface layer The lightning strike is prone to melting.
Because of the good insulation of the intermediate polyethylene core layer, the damage of the lightning strike is limited to the skin. From this perspective, the acp panel has better lightning strike resistance than the aluminum single board.
Aluminum veneers are not burning, which is known to everyone. Early acm material were not able to prevent fire. However, with the advancement of aluminum composite panel technology, the fire-resistant acp panels produced nowadays have been greatly improved in fire resistance due to the addition of non-toxic flame retardant materials to their PE. Meet the needs of engineering fire protection.
Aluminum veneers have a certain residual value, but because of their high cost, the waste is much larger than that of aluminum composite panels with almost no residual value. In summary, the aluminum veneer and the aluminum composite sheet have their own advantages, but from a large perspective, the application of aluminum composite panels should be more affordable and environmentally friendly.
Alusign is a Chinese acp manufacturer and exporter of aluminum metal panels with 16 years of experience. We have a professional, strict manufacturing team and quality inspection team. The aluminum composite metal panels sold by Alusign are strictly controlled, and the quality of the products is enough for customers to trust.
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