AUTOMOTIVE INSULATING TRIM PART

摘要

A sound insulating trim part with acoustic mass-spring characteristics with a mass layer and a decoupling layer, wherein the mass layer consist of a porous fibrous layer (1 ) and an impervious thin barrier layer (2), whereby the impervious thin barrier layer is between the porous fibrous layer and the decoupling layer (3) and all layers are laminated together, and whereby the porous fibrous layer has a dynamic Young's modulus (Pa) of at least (96-AW-t) with AW being an area weight (g/m2), and t being a thickness (mm) of the porous fibrous layer.