Light weight acoustic trim part
First Claim
1. Multilayer Automotive trim part for noise attenuation comprising at least two fibrous layers and at least one air permeable intermediate film layer between the at least two fibrous layers, whereby all layers together have a variable thickness characterized in that at least for an area with a thickness between 4 and 12.5 mm the overall air flow resistance (AFRoverall) and the overall density relate as follows 1500<
- AFRoverall−
10<
3800 with AFRoverall in Nsm−
3 and in kg/m3.
1 Assignment
0 Petitions
Accused Products
Abstract
Multilayer sound attenuating trim part for a vehicle, in particularly for a trim part or cladding used in the interior of a car, for instance as an inner dash or as part of the floor covering or for the exterior of a vehicle, for instance as a trim part or cladding in the engine bay area or as part of an under body trim part as well as to the method of producing a part, comprising at least two fibrous layers (10, 30) and at least one air permeable intermediate film layer (20) between the at least two fibrous layers, whereby all layers together have a variable thickness.
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Citations
29 Claims
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1. Multilayer Automotive trim part for noise attenuation comprising at least two fibrous layers and at least one air permeable intermediate film layer between the at least two fibrous layers, whereby all layers together have a variable thickness characterized in that at least for an area with a thickness between 4 and 12.5 mm the overall air flow resistance (AFRoverall) and the overall density relate as follows 1500<
- AFRoverall−
10<
3800 with AFRoverall in Nsm−
3 and in kg/m3. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 21, 29)
- AFRoverall−
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2. Multilayer Automotive trim part for noise attenuation comprising at least two fibrous layers and at least one air permeable intermediate film layer between the at least two fibrous layers, whereby all layers together have a variable thickness characterized in that at least for an area with an overall density above 250 kg/m3 the overall air flow resistance (AFRoverall) and the overall density relate as follows 1500<
- AFRoverall−
10<
3800 with AFRoverall in Nsm−
3 and in kg/m3. - View Dependent Claims (16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 28)
- AFRoverall−
Specification