PROCEDE DE FABRICATION D'UN PANNEAU SANDWICH EN MATERIAU COMPOSITE, ET PANNEAU AINSI OBTENU

摘要

A composite material has an open cellular core, whose cells are closed with foam. The faces of the core are covered with a barrier fabric and fibres impregnated in a polymerized resin that adheres to the core. An Independent claim is included for manufacturing a composite material as above includes assembling in a mould a cellular core covered in turn with a fireproof film, a dry barrier fabric, dry fibres. The mould is closed. Heat and pressure is applied to the assembly so the film polymerizes and expands to close off the cells without impregnating the barrier fabric. Resin is injected into the mould under vacuum to impregnate the barrier fabric and dry fibres. The resin is polymerized and the mould opened.