Noise isolation sheet

Abstract

There is provided a noise isolation sheet 10 which is comprised of an optional number of closed-cell foamed layer 11, open-cell foamed layer 12 and fibered noise absorbing material 13, being laminated in an optional order, and which insulates the noise near 1000 Hz. Further, there is provided a noise isolation sheet 10 comprised of an optional number of the closed-cell foamed layer 11 and the fibered noise absorbing material 13 being laminated in an optional order. There is also provided a noise isolation sheet 10 comprised of an optional number of the open-cell foamed layer 12 and the fibered noise absorbing material 13 being laminated in an optional order. Each noise isolation sheet 10 is used to partially or fully cover an interior side of a door inner panel of a vehicle.

1 . A noise isolation sheet characterized in that it comprises an optional number of closed-cell foamed layer, open-cell foamed layer and fibered noise absorbing material, 
 wherein said closed-cell foamed layer, open-cell foamed layer and fibered noise absorbing material are laminated in an optional order.    
   
   
       2 . A noise isolation sheet characterized in that it comprises an optional number of closed-cell foamed layer and fibered noise absorbing material, 
 wherein said closed-cell foamed layer and fibered noise absorbing material are laminated in an optional order.    
   
   
       3 . A noise isolation sheet characterized in that it comprises an optional number of open-cell foamed layer and fibered noise absorbing material, 
 wherein said open-cell foamed layer and fibered noise absorbing material are laminated in an optional order.    
   
   
       4 . A noise isolation sheet characterized in that it is used for partially or fully covering an interior side of a door inner panel of a vehicle, comprising an optional number of closed-cell foamed layer, open-cell foamed layer and fibered noise absorbing material, 
 wherein said closed-cell foamed layer, open-cell foamed layer and fibered noise absorbing material are laminated in an optional order.    
   
   
       5 . A noise isolation sheet characterized in that it is used for partially or fully covering an interior side of a door inner panel of a vehicle, comprising an optional number of closed-cell foamed layer and fibered noise absorbing material, 
 wherein said closed-cell foamed layer and fibered noise absorbing material are laminated in an optional order.    
   
   
       6 . A noise isolation sheet characterized in that it is used for partially or fully covering an interior side of a door inner panel of a vehicle, comprising an optional number of open-cell foamed layer and fibered noise absorbing material, 
 wherein said open-cell foamed layer and fibered noise absorbing material are laminated in an optional order.    
   
   
       7 . A noise isolation sheet claimed in  claim 4  characterized in that a layer positioned in an outermost exterior side of a vehicle is the closed-cell foamed layer.  
   
   
       8 . A noise isolation sheet claimed in  claim 6  characterized in that a layer positioned in an outermost exterior side of a vehicle is the open-cell foamed layer.  
   
   
       9 . A noise isolation sheet claimed in  claim 1  characterized in that said fibered noise absorbing material is an urethane chip felt or resin felt.  
   
   
       10 . A noise isolation sheet claimed in  claim 5  characterized in that a layer positioned in an outermost exterior side of a vehicle is the closed-cell foamed layer.  
   
   
       11 . A noise isolation sheet claimed in  claim 10  characterized in that said fibered noise absorbing material is an urethane chip felt or resin felt.  
   
   
       12 . A noise isolation sheet claimed in  claim 1  characterized in that said fibered noise absorbing material is an urethane chip felt or resin felt.  
   
   
       13 . A noise isolation sheet claimed in  claim 2  characterized in that said fibered noise absorbing material is an urethane chip felt or resin felt.  
   
   
       14 . A noise isolation sheet claimed in  claim 3  characterized in that said fibered noise absorbing material is an urethane chip felt or resin felt.  
   
   
       15 . A noise isolation sheet claimed in  claim 4  characterized in that said fibered noise absorbing material is an urethane chip felt or resin felt.  
   
   
       16 . A noise isolation sheet claimed in  claim 5  characterized in that said fibered noise absorbing material is an urethane chip felt or resin felt.  
   
   
       17 . A noise isolation sheet claimed in  claim 6  characterized in that said fibered noise absorbing material is an urethane chip felt or resin felt.  
   
   
       18 . A noise isolation sheet claimed in  claim 7  characterized in that said fibered noise absorbing material is an urethane chip felt or resin felt.  
   
   
       19 . A noise isolation sheet claimed in  claim 8  characterized in that said fibered noise absorbing material is an urethane chip felt or resin felt.