Low-weight and water-resistant honeycomb sandwich panels...

Details Low-weight and water-resistant honeycomb sandwich panels... Low-weight and water-resistant honeycomb sandwich panels...

B - Operations, Transporting

29

C

B29C 70/48 (2006.01) B29D 22/00 (2006.01) B29D 24/00 (2006.01) B32B 3/12 (2006.01) B32B 27/12 (2006.01)

Patent

CA 2195050

The instant invention pertains to a low-weight and water-resistant composite panel made from an open cell core, such as honeycomb, using the resin transfer molding (RTM) process. The open cell core is sealed to a degree of at least 95 %, and even up to 100 %, by use of a resin/moisture barrier before the liquid resin is injected into the fibrous reinforcement. This prevents resin fill into the open cell core during the RTM process and isolates the core from water migration after the structure is put into service.

a présente invention a trait à un panneau composite léger et résistant à l'eau qui a une âme faite d'un matériau à alvéoles ouverts, tel le nid d'abeille, au moyen du moulage par transfert de résine (procédé RTM). L'âme à alvéoles ouverts est scellée au moins à 95 %, et même jusqu'à 100 %, à l'aide d'une membrane étanche à la résine et à l'eau appliquée avant l'injection de la résine liquide dans l'armature fibreuse. Ceci empêche la résine d'envahir l'âme à alvéoles ouverts au cours du procédé RTM et protège le matériau alvéolaire contre les infiltrations d'eau une fois l'ouvrage en service.

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