Reinforced acoustical material having high strength, high modulus properties

Abstract

A multilayer composite material is formed of an acoustic core layer and at least one outer strengthening layer. The acoustic composite material has desirable high strength and high flexural modulus properties.

1 - 10 . (canceled) 
     
     
         11 . An acoustic composite material comprising at least one outer strengthening layer and an acoustic core layer next to a major surface of the at least one outer strengthening layer, the acoustic core layer comprising dehydrated reinforcing fibers and organic fibers. 
     
     
         12 . The acoustic composite material of  claim 11 , wherein the acoustic core layer comprises a substantially homogenous mixture of the dehydrated reinforcing fibers and the organic fibers. 
     
     
         13 . The acoustic composite material of  claim 11 , wherein at least some of the dehydrated reinforcing fibers and the organic fibers in the acoustic core layer are bonded to the outer strengthening layer. 
     
     
         14 . The acoustic composite material of  claim 11 , wherein the dehydrated reinforcing fibers are formed from wet reinforcing fibers. 
     
     
         15 . The acoustic composite material of  claim 14 , wherein the wet reinforcing fibers in the acoustic core layer are wet use chopped strand glass fibers. 
     
     
         16 . The acoustic composite material of  claim 11 , further includes a facing layer on at least one exposed major surface of the outer strengthening layer. 
     
     
         17 . The acoustic composite material of  claim 11 , wherein the acoustic core layer is thermally bonded to the outer strengthening layer. 
     
     
         18 . The acoustic composite material of  claim 11 , wherein the first and second outer strengthening layers are on opposing major surfaces of the acoustic core layer. 
     
     
         19 . The acoustic composite material of  claim 11 , wherein the outer strengthening layer comprises a chopped strand mat. 
     
     
         20 . The acoustic composite material of  claim 19 , wherein the first and second outer strengthening layer comprises a chopped strand mat.