Sandwich panels are a type of modern and practical building material that generally consists of two thin layers of sheet with an insulating material in the middle. Usually, materials such as rock wool, glass wool, polyurethane or polystyrene are used as insulation in the construction and production of sandwich panels. The material of the sheets placed on both sides of the insulation also varies, and sahndwich panelmanufacturers have numerous options.
The most common sheets that can be used in the manufacture of sandwich panels are: galvanized sheet, aluzinc sheet, colored sheet, plain or colored aluminum sheet, and kraft paper, and the choice of sheet type also affects the use of these sandwich panels. In this article, we will discuss the types of sandwich panel sheets and their uses.
Types of sandwich panel sheets
The types of sandwich panel sheets vary depending on their application in the construction industry. Sandwich panels are made from metal sheets and a type of insulating material, with the sheets placed on the top and bottom, and the insulating layer placed in the central core of the sandwiches. Sheets such as galvanized sheet, aluzinc sheet, colored sheet, plain or colored aluminum sheet, and kraft paper are used in the manufacture of sandwich panels, and we will examine each of them below.
Aluzinc sheet
The main and most widely used type of sheet used in sandwich panel manufacturing is Aluzinc. Aluzinc sheet is made from a rolled galvanizing process by combining alloys of aluminum, zinc, and silicon. Aluminum is a corrosion-resistant element and zinc also has anti-wear properties. This sheet is made of super polyester that has good thickness on both the inside and outside.
Using this type of sheet in the manufacture of sandwich panels is a good choice for highly acidic environments and dense industrial spaces. The most important features that can be mentioned for this type of sandwich panel are weldability and high colorability. It also has good resistance to acids and chemicals, so that the resistance of Aluzinc sheet is much higher compared to sheets such as galvanized and aluminum. Aluzinc sheet also has anti-scratch and anti-rust properties.
Aluminum sheet
Another common choice for sandwich panel construction is aluminum sheet. These sheets are very light and inexpensive, have high flexibility, and also have anti-corrosion and anti-rust properties. These sheets have higher flexibility than steel and other metals and are easily malleable.
These sheets are used in the construction of wall and ceiling sandwich panels, and their most important application is in the construction of various types of enclosures, containers, clean rooms (get acquainted with Clean Room Sandwich Panels), prefabricated houses, and…
Since aluminum is a lightweight metal, aluminum-clad sandwich panels can be used in earthquake-prone and disaster-prone areas that require lightweight structures.
Other features of this sheet include sterilization properties, high and uniform color fastness, etc. However, it should be noted that aluminum sheet has a high transmission coefficient and is not a good insulator for heat and cold, and it is not washable. In a fire, it loses its original shape and is less resistant than other sheets.
Galvanized sheet
These sheets are also used in the manufacture of wall and ceiling sandwich panels. Galvanized sheet is a combination of steel coated with zinc alloy. The use of zinc in the coating of this type of sheet ensures that the sheet maintains its hardness well and has high strength. Galvanized sheets are waterproof and acid-proof.
These sheets are generally used in humid environments. Therefore, the most important application of sandwich panels with galvanized sheets is in pitched roofs in environments with high humidity and also in greenhouse construction. These sheets are galvanized by two methods: cold and hot, and in the cold galvanization method, an electrochemical process is used. In the hot method, which is considered the best method for galvanizing steel, molten zinc is used as a coating on the steel sheet.
Using galvanized sheet in the manufacture of sandwich panels saves costs, increases the strength and lifespan of the sandwich panel, and makes it adaptable to a variety of weather conditions.
Flushing sheet
In the manufacture of sandwich panels with special use in the roof, in addition to the sheets we mentioned, flushing sheets are also used. These sheets have very high waterproof and acid-resistant properties and are generally used in the manufacture of watertight and sealants, in addition to being used in the manufacture of sandwich panels.
Flushing sheets are recommended in the construction of roof sandwich panels for environments with high humidity and rainfall. For example, in the construction of pitched roofs, sandwich panels with flushing sheets can be used according to the defined characteristics.
Dampa sheet
This type of sheet is also used in the manufacture of wall and ceiling sandwich panels. This type of sheet has a beautiful visual appearance and is available in two types: self-colored and painted. The wide variety of designs and colors in Dampa sheets are among its practical features, making this sheet suitable for use as ceiling and wall panels in residential and commercial building structures, etc.
Shadowline sheet
These types of sheets are also commonly used in the construction of roof sandwich panels. Among the features of this sheet are its high strength and resistance to corrosion and decay. This is why sandwich panels with Shadowline sheets are widely used in the construction of gable roofs.
summary
Given the wide use of sandwich panels in construction, using a variety of sheets in their manufacture helps them find more specialized applications. The sandwich panel is designed in such a way that on both sides there is a metal sheet of various materials such as galvanized, aluminum, aluzinc, etc., and in the core of the sandwich panel there is insulation such as glass wool, rock wool, polyurethanematerials, etc. The use of different sheets in the manufacture of sandwich panels is done according to the characteristics of the sheets as well as the application of the sandwich panel. As you read in the article, some of these sheets are suitable only for ceiling sandwich panels, some for wall sandwich panels, and some for both. Familiarity with the characteristics of the types of sheets used in the manufacture of sandwich panels will allow the user to make a better choice based on their type of application.
