LIGHT WEIGHT ACOUSTIC TRIM COMPONENT

Japanese Patent JP2020183227

A

To optimize a multilayer sound attenuation trim component for a vehicle, and in particularly, further optimize overall acoustic performance of the component.SOLUTION: A multilayer automotive trim component for sound attenuation comprises at least two fiber layers 10 and 30 and at least one air permeable intermediate film layer 20 between the at least two fiber layers. The multilayer automotive trim component for sound attenuation is characterized in that all layers have changed thickness, and at least in an area where thickness is between 4 to 12.5 mm or at least for an area where overall density is above 250 kg/m3, relationship between overall air flow resistance (AFRoverall) and overall density ρ satisfies a relationship of 1500