As a common building board, sandwich panels are often used on the roof and walls of buildings. Therefore, the performance of the sandwich panel in extreme environments determines the overall quality of the building. The sandwich panel is composed of two layers of metal plates and core materials such as rock wool or polyurethane. This structure gives the sandwich panel the ability to cope with a variety of extreme environments. This is also an important reason why sandwich panel can stand out from many plates.
Sandwich panel in high temperature environments
The high temperature environment is the environment that the sandwich panel must face. Because the sandwich panel needs to be exposed to sunlight for a long time. At the same time, the sandwich panel will also be tested by the high temperature radiation generated by the indoor scene, and even the fire.
The metal panel of the sandwich panel can reflect most of the sunlight radiation. Because of the low thermal conductivity of the core material, the structural integrity of the sheet in the high temperature environment can be ensured. It can slow down the aging of the sheet metal and extend the service life of the sheet. In addition, rock wool and polyurethane sandwich panel is flame-retardant, so the building is not susceptible to fire damage.
Sandwich panel in cold environments
In cold and high-latitude regions such as Russia or Canada, sandwich panel needs to have the ability to fight cold environments. The metal panel of the sandwich panel needs to maintain good structural strength and rigidity, and there will be no brittleness. At the same time, the coefficient of thermal expansion of the core material should not be too high. Otherwise, the plate will be deformed due to drastically changing temperature differences.
High-quality rock wool and polyurethane materials have a low coefficient of thermal expansion, which can ensure the stability of the internal structure of the sheet. At the same time, the low thermal conductivity of the material can fully ensure that the indoor heat is not lost and the basic temperature is maintained.
Sandwich panel in humid and corrosive environments
The coastal area is an important gathering area for mankind and the area where sandwich panels are most widely used. Waterproof, moisture-proof and erosion-proof have become the most important capabilities of sandwich panels. The metal panels of high-quality sandwich panels are generally rust-proof, which can reduce the erosion of the panels by sea breeze and rain. At the same time, core materials such as rock wool and polyurethane are also hydrophobic insulation materials. This can effectively prevent the penetration of moisture and reduce the possibility of corrosion of the plate from the inside.
Due to its own properties, rock wool will have certain gaps at the edge of the material, which is not conducive to moisture-proof and waterproof of the sheet. In order to solve this problem, people have developed rock wool sandwich panels with polyurethane edge. This new type of sandwich panel combines the advantages of rock wool and polyurethane materials. While ensuring the fire resistance, it solves the problem of gaps and improves the air tightness.
Harbin Dong`an Building Sheets Company is a leading manufacturer of sandwich panels in China. The company continues to provide high-quality polyurethane edge rock wool sandwich panels to the market.
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