Light weight acoustic trim part
AssigneeAutoneum Management AG
InventorsDelphine GUIGNER, Vipul SAVALIYA, Marco SEPPI
Life of this patent
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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.
Claims16
Multilayer Automotive trim part for noise attenuation comprising at least 2 fibrous layers and at least one air permeable intermediate film layer between the at least 2 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 ρ relate as follows 1500<AFRoverall−10ρ<3800 with AFRoverall in Nsm−3 and ρ in kg/m3.
Multilayer Automotive trim part for noise attenuation comprising at least 2 fibrous layers and at least one air permeable intermediate film layer between the at least 2 fibrous layers, whereby all layers together have a variable thickness characterized in that at least for an overall density above 250 kg/m3 the overall air flow resistance (AFRoverall) and the overall density ρ relate as follows 1500<AFRoverall−10ρ <3800 with AFRoverall in Nsm−3 and ρ in kg/m3.
Dependencies are inferred from the claim text.