Load-bearing sandwich panel

Large institutional and commercial refrigerators, freezers, and cold storage areas, including cryogenic equipment and gas tanks, are insulated with polystyrene or polyurethane foams. Polystyrene foam is popular where cost and moisture resistance are important polyurethane is used for spray application. Polystyrene foam is also used in load-bearing sandwich panels for low-temperature applications. 

Ten prototype elements were tested in four-point bending tests under static and cyclic loading to determine the load-bearing behavior and capacity. The results of three representative bending tests are depicted in Fig. 11. As calculated, all sandwich panels failed by shear rupture of the core. The load level at which the shear failure occurred was significantly influenced by the quality of the adhesive bond between the notched core and concrete facings, [5]. After the tests, the joint quality of the panels was examined by saw cuts. 

Structural-engineering foams, sandwich panels (SWP) Foams of (PIR), polyolefins (PE, PP), modified PPO, PC, ABS, high-impact PS, sandwiched PU (for load bearing applications)... 

Pour-in place and foam is a very attractive on-site method used for thermal insulation. This method, although not commonly used mainly due to its rather imfavourable economy, is very practical. The technique uses relatively simple equipment, and rests on the principle of pouring the specially formulated mixture to be foamed as a low viscosity liquid into the cavity to be filled (usually between the load bearing inner face of the wall and the weather resistant facade wall of brick-cement or masonry, for cavity wall construction or between metal boards to produce sandwich panels, etc.), where the mixture is left to foam and adhere the walls by sealing the cavity effectively. 

A cold curing epoxy adhesive developed primarily for bonding load-bearing inserts into honeycomb sandwich panels. Suitable for operation up to 150 6. 

The combination of core (aluminium, aramid, paper, carbon, glass or balsa), skins (aluminium, steel, titanium, FRP, melamine or wood) and adhesive (film or paste, epoxy, phenolic, PUR, PI, cyanate ester, acrylic or thermoplastic) gives a sandwich panel which is an integrally bonded, load-bearing structure. 

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