Noise suppression structure and method of making the same

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 9/06 (2006.01) B29C 44/34 (2006.01) C08L 79/08 (2006.01)

Patent

CA 2557565

An integrated noise suppression acoustic panel includes a back plate, a face plate, and a bulk foam absorber disposed between the back plate and the face plate. The bulk foam absorber is formed of a thermoset material, such as bismaleimide or phenolic, and is manufactured using a low pressure process. In particular, a foamable material is melted, and a blowing agent is mixed with the foamable material to obtain a mixture. The foam is formed and the mixture is cured by heating it to a temperature, and maintaining the mixture at the temperature for a time sufficient to cure the mixture.

L'invention concerne un panneau acoustique de suppression de bruit intégré qui comprend une plaque arrière, une plaque avant, et un agent d'absorption composé de mousse en vrac disposé entre la plaque arrière et la plaque avant. Ledit agent d'absorption composé de mousse en vrac est constitué d'un matériau thermodurci, de type bismaléimide ou matériau phénolique, et est produit au moyen d'un procédé à basse pression. En particulier, un matériau pouvant former une mousse est fondu, et un agent de gonflage est mélangé audit matériau pouvant former une mousse afin d'obtenir un mélange. La mousse est formée et le mélange est durci par chauffage à une température donnée, et par maintien du mélange à la température donnée pendant une durée suffisante nécessaire pour faire durcir le mélange.

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