Patent ID: 7147716

Claim:
Inner roof lining for a vehicle roof (A) having an air permeable core layer ( 4 ), which core layer ( 4 ), on the vehicle roof side, comprises a first air permeable stiffening layer ( 2 ) and on the passenger compartment side comprises a second air permeable stiffening layer ( 6 ), whereby the second stiffening layer ( 6 ) on the passenger compartment side is provided with an air permeable décor layer( 8 ), wherein the first stiffening layer ( 2 ) on the vehicle roof side comprises an air impermeable backing layer ( 1 ), and wherein the first stiffening layer ( 2 ) and the core layer ( 4 ), as well as the core layer ( 4 ) and the second stiffening layer ( 6 ) and the décor layer ( 8 ) are attached to each other with the aid of air permeable adhesive layers ( 3 , 5 , 7 ), whereby for producing an acoustically optimized vehicle roof inner lining, the combination of layers ( 5 , 6 , 7 , 8 ) on the passenger compartment side of the core layer have a total air flow resistance in the range of 500 Nsm −3 <R t <3500 Nsm −3 and an area weight of between 300 gr/m 2 to 800 gr/m 2 , and wherein the backing layer ( 1 ) is provided on the vehicle roof side with an embossed relief-like profile.