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Selecting the right core material for sandwich panels is essential to ensuring the final product meets performance requirements while maintaining budget efficiency and minimizing weight. Composite sandwich panels consist of paired rigid facings bonded to a robust yet weight-optimized interior core, and the central filler serves as the foundation in determining stiffness, insulation, weight, کانکس ویلایی and durability.

Polyurethane cores are commonly preferred in industrial and HVAC applications due to their superior heat resistance and strong bonding with face sheets. They offer resistance to deformation under pressure and are typically deployed where thermal performance is critical. However, they can be sensitive to high temperatures and may release harmful fumes in a fire unless chemically stabilized for fire safety.

PS cores in EPS or XPS configurations is widely used because it is economical, convenient to shape, and provides effective water repellency. It is frequently found in shipping containers and modular builds but offers inferior insulation and lower fire tolerance. Extruded polystyrene has better mechanical properties than EPS, making it a more suitable selection for load bearing applications.

Honeycomb structures, typically made from metallic, paper-based, or polymer substrates, offer remarkable load capacity relative to density. They are ideal for aerospace, transportation, and high performance industrial uses because they provide structural stability with minimal added weight. However, they are pricier to produce and require precision fabrication methods. Their porous design also means they may need secondary barriers against humidity and heat transfer.

Mineral wool cores stand out for their fire resistance and sound absorption. Often used in offices, hospitals, and manufacturing plants, they fulfill mandatory safety standards and resist collapse in extreme temperatures. While they are bulkier compared to EPS or PUR and offer lower thermal insulation per inch, they are indispensable in applications where occupant safety and comfort are paramount.

In choosing the optimal core, consider the environment the panel will be exposed to, the mechanical load expectations, thermal and acoustic needs, building codes and compliance standards, and cost constraints. For example, a industrial storage wall may benefit from affordable foam cores, while an aerospace component would require the high strength and lightness of a honeycomb core. Testing samples under real world conditions and collaborating with structural analysts can help eliminate premature system degradation. The optimal selected core doesn’t just enhance efficiency—it can extend the lifespan of the entire panel system.