Patent ID: 6145617
Filing Date: 2000-11-14
Classification: B32B,B60R,G10K

Abstract:
A multi-functional insulation for use in vehicles, which is sound-absorbing, sound-insulating, oscillation-damping and heat-insulating, for use as a floor insulation, an end wall insulation, a door covering, or a roof inner covering, in combination with at least one sheet-like vehicle part and having a noise-reducing assembly package of several layers, the assembly package comprising:at least one porous resilient layer;a microporous stiffening layer which has a total airflow resistance of R.sub.t =500 Nsm.sup.-3 to R.sub.t =2500 Nsm.sup.-3, and an areal-mass of m.sub.F =0.3 kg/m.sup.2 to m.sub.F =2.0 kg/m.sup.2 ;wherein between the assembly package and the sheet-like vehicle part there is provided an air layer; andwherein said multi-layered assembly package is a heavy-layer free package.