A sandwich panel consists of two coating supports where between is inserted an insulating product. The supports can be various types, depending on the applications for which the finished product is needed: metal, wood, plastic, gypsum board, etc... It is also possible to make semi-sandwich panels, in case only one coating is applied to the insulating board.
Extruded polystyrene is a product that is well suited to the production of sandwich panels, being a light, clean, easily shapeable product, with excellent thermal performance and suitable for bonding. For this type of industrial process it is correct to use boards without extrusion skin, with or without grooves, to facilitate the adhesion of the glue and the support. On both sides of the XPS board is applied an adhesive, generally polyurethane glue is applied to attach the two supports used. For very thin sandwich panels it is preferable to use a core with tight tolerances, calibrated by the use of a belt-sander. On the other hand, if a greater thickness is required, is available a type with grooves that ensure the release of air bubbles during the bonding phase.
The products designed specifically for these needs are: Corevo Foam, Corevo H and Corevo Block WR.