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The XPS (Extruded Polystyrene) sandwich panel is one of the most commonly used types of sandwich panels, thanks to its unique features and outstanding properties. These panels consist of an XPS foam core (extruded polystyrene) and two outer metal sheets as surface layers.
This structure makes XPS sandwich panels an ideal choice for a wide range of construction projects.
Applications of XPS Sandwich Panels
Due to its distinctive properties, the XPS sandwich panel is widely used in various construction industries.
These panels feature an insulating XPS foam core and two metal sheets as outer layers, providing both strength and insulation.
Advantages of XPS Insulating Foam and Core
• The XPS insulating foam, like polyurethane foam, is produced through an exothermic injection process, resulting in strong molecular bonding.
• This type of foam has a density of 40 ± 2 kg/m³, similar to polyurethane, ensuring high compression strength.
• After the material is mixed, it is extruded through a rectangular nozzle, much like toothpaste, and can then be formed into different shapes.
• Thanks to the use of strong polyurethane adhesive in assembly, the bonding to the metal layers is robust and durable, comparable to polyurethane foam. These adhesives are also exothermic and cure with heat.
• XPS sandwich panels are more affordable than polyurethane panels while offering similar quality, making this one of their most significant advantages.
Disadvantages of XPS Insulating Foam (Core)
• The main drawback of XPS foam appears in trapezoidal roof panels, particularly in the “wave” or “crest” sections (visible in the panel photo).
Due to its high density, XPS cannot be cut to match the wave patterns of trapezoidal panels, making it unsuitable for these contours.
For this reason, polystyrene foam is used in such applications. (This issue does not occur in wall panels.)
Advantages of Aluzinc Sheets
• Resistant to rust and corrosion due to the aluminum alloy in the Aluzinc coating
• More resistant to color fading compared to galvanized sheets
Disadvantages of Aluzinc Sheets
• The paint on Aluzinc sheets is similar to automotive paint and can be scratched if struck by sharp objects
• Due to its malleability, Aluzinc sheets can dent when hit by objects like a hammer
Advantages of Aluminum Foil
• Ease of installation and integration with other systems
• Quick execution of sandwich panels
• Lightweight and easy to transport even in large dimensions
• More economical compared to galvanized sheets
• Suitable for interior walls that will be covered with an additional finish
Disadvantages of Aluminum Foil
• Poor insulation against heat and cold
• Not washable
• Lacks aesthetic appeal and comes in limited colors
• Lower strength and durability compared to galvanized sheets, serving mainly as a cover layer