Acoustic attenuation panel with improved performances in low and medium frequencies
AssigneeArianegroup SAS
InventorsBernard Troclet, Pierre Godart
Life of this patent
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Abstract
An acoustic attenuation panel including: a main layer made of a porous material and having two opposite faces; a coating layer arranged on one of the two faces of the main layer; an adhesive film, arranged at the interface between the main layer and the coating layer to assemble same. The main layer is a body made of melamine resin foam having a density between 6 and 6.8 kg/m3 and a porosity rate between 0.978 and 0.984; the coating layer is a fabric with a density between 484 and 526 kg/m3 and a porosity rate between 0.771 and 0.817; the adhesive film is a film made of a thermoplastic material provided with holes passing through and having a surface density between 40 g/m2 and 56 g/m2.
Claims11
Acoustic attenuation panel comprising:
- a first layer, so-called main layer, made of a porous material and having two opposite faces;
- and
- a second layer, so-called coating layer, disposed on one of the two faces of the main layer;
- wherein the main layer is a body made of melamine resin foam having a density between 6 and 6.8 kg/m3 and a porosity rate between 0.978 and 0.984,
- wherein the coating layer is a fabric having a density between 484 and 526 kg/m3 and a porosity rate between 0.771 and 0.817, and
- wherein the main layer and the coating layer are assembled one with the other by an adhesive film that is disposed at the interface between the main layer and the coating layer, the adhesive film being a film made of a thermoplastic material provided with through holes and having a surface density between 40 g/m2 and 56 g/m2.
Dependencies are inferred from the claim text.