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Selecting the right core material for sandwich panels is critical to ensuring the final product meets performance requirements while keeping expenses low and minimizing weight. Sandwich panels consist of two thin, strong face sheets bonded to a low-density central layer, and the core serves as the foundation in determining rigidity, thermal performance, mass, and longevity.

Polyurethane foam cores are commonly preferred in building envelopes and cold chain systems due to their superior heat resistance and strong bonding with face sheets. They offer resistance to deformation under pressure and are often used where low heat transfer is required. However, they can be sensitive to high temperatures and may produce hazardous smoke unless chemically stabilized for fire safety.

Polystyrene in both expanded and extruded variants is commonly utilized because it is inexpensive, simple to machine, and provides good moisture resistance. It is frequently found in shipping containers and modular builds but lacks the thermal performance and fire resistance of polyurethane. Extruded PS has better mechanical properties than EPS, making it a preferred option for high-stress environments.

Honeycomb cores, typically made from metallic, paper-based, or polymer substrates, offer exceptional strength to weight ratios. They are perfect for aviation, automotive, and advanced manufacturing because they provide high torsional resistance at low density. However, they are cost-prohibitive and require precision fabrication methods. Their porous design also means they may need coatings or encapsulation to enhance insulation performance.

Fibrous mineral insulation cores stand out for their non-combustible nature and noise-reducing properties. Often used in public infrastructure and heavy-duty environments, they meet stringent fire safety codes and retain strength during prolonged exposure to fire. While they are heavier than foam cores and offer diminished heat resistance per unit depth, they are indispensable in applications where fire protection and noise control are critical.

When selecting a core, consider the environment the panel will be exposed to, خرید کانکس the required load capacity, insulation and soundproofing requirements, building codes and compliance standards, and cost constraints. For example, a logistics facility facade may benefit from economical EPS, while an airplane cabin would require the exceptional stiffness-to-weight ratio of cellular structures. Conducting field trials and environmental simulations and collaborating with structural analysts can help prevent design failures. An appropriately chosen core doesn’t just enhance efficiency—it can extend the lifespan of the entire panel system.