Acoustically resistive layer, process for production of this layer and absorbent acoustic panel provided with at least one such layer, as well as its process for production
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United States of America Patent
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Jul 31, 2001
Grant Date -
N/A
app pub date -
Aug 13, 1998
filing date -
Aug 13, 1997
priority date (Note) -
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Abstract
An acoustically resistive layer comprises at least one layer (12) of acoustic damping cloth and a reinforcing material comprising a sheet (14, 114, 214, 314) of filaments (16) secured to the acoustically damping cloth. The filaments (16) are disposed unidirectionally, bidirectionally or multidirectionally. A process for producing such an acoustically resistive layer, comprises positioning an acoustically damping cloth (12) on a mold (18) having the shape of the layer to be obtained, and disposing on this acoustically damping cloth filaments (16) impregnated with a binder by filamentary winding, and then withdrawing the layer thus obtained from the mold, or by laying with application of pressure, and withdrawing the layer thus obtained from the mold.
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