Procedure for producing a reinforced, acoustically resistive...

B - Operations – Transporting – 32 – B

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B32B 27/04 (2006.01) B64D 29/00 (2006.01) F16S 1/00 (2006.01) G10K 11/162 (2006.01)

Patent

CA 2389873

The object of the invention is a process for the production of a reinforced acoustically resistive layer, in which there is produced a layer of structural reinforcement (2) from fibers pre-impregnated with a thermosetting or thermoplastic resin, said layer having a given quantity of open surface relative to the acoustic waves to be handled, there is associated with said reinforcing layer (2) a metallic acoustic cloth (5) whose mesh is suitable for the quantity of open surface of said structural layer, and the polymerization or consolidation of said resins under pressure and temperature suitable for the resins used, is carried out, characterized in that there is associated with the impregnation resin for the fibers a component (2a) adapted for macromolecular interpenetration with said resin during the polymerization or consolidation so as to ensure for the reinforcing layer (2) improved mechanical and adhesive properties for the metallic cloth (5). -Application to the production of acoustic panels.

- L'objet de l'invention est un procédé de réalisation d'une couche acoustiquement résistive renforcée, dans lequel on réalise une couche de renfort structural (2) à partir de fibres pré-imprégnées d'une résine thermodurcissable ou thermoplastique, ladite couche présentant un taux de surface ouverte donné en rapport avec les ondes acoustiques à traiter, on associe à ladite couche de renfort (2) un tissu acoustique métallique (5) dont la maille est adaptée au taux de surface ouverte de ladite couche structurale, et on assure la polymérisation ou consolidation desdites résines sous les pression et température adaptées aux résines utilisées, caractérisé en ce que l'on associe à la résine d'imprégnation des fibres un composant (2a) susceptible d'interpénétration macromoléculaire avec ladite résine lors de la polymérisation ou consolidation en sorte d'assurer à la couche de renfort (2) des propriétés mécaniques et d'adhésion au tissu métallique (5) améliorées. - Application à la fabrication de panneaux acoustiques.

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