SANDWICH PANEL FILLING MATERIALS

The most preferred inner core filling materials in sandwich panel applications consist of various materials such as Polyurethane, PIR, Polystyrene, Phenolic Foam, and Rock Wool. These materials are categorized under two groups: all materials such as Polyurethane, PIR, Polystyrene, Phenolic Foam are categorized as Plastic Foam whereas Rock Wool is categorized as an inorganic fiber. People often ask and wonder about how they are different from each other or what kind of performance advantages are offered by each of these materials. Although sandwich panels are used in a wide range of applications, there are significant misconceptions about their technical specifications in addition to the lack of reliable information flow. The type of core material plays a very crucial role in choosing the right composite sandwich panels taking into consideration the mechanical strength, insulation, fire performance, and manufacturing processes in line with the building physics. From this perspective, it is highly crucial to correctly identify all performance criteria expected from the materials and compare them to each other in a reliable manner. PUR/PIR (Polyurethane), namely, Polyurethane (PUR) and Polyisocyanurate (PIR) are among the plastic foams that are most used in the production of sandwich panels. Generally preferred in laminated lines, they offer significant advantages as this type of plastic foams has outstanding adhesion properties during the foaming process. In recent years, their chemical properties have been improved leading to increased fire performance. In their production, environmentally friendly n-Pentane gas is used. Having been used for over 50 years in sandwich panel production, polyurethane is known as the most reliable insulating material to date.

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