Sound absorptive protective mat

摘要

The present invention concerns an automotive protective mat ( 1 ), also known as throw in mat or protective mat. This mat comprises a microporous stiffening layer ( 2 ) (acoustical membrane). This layer may be composed of several sheets. The overall air flow resistance is between 500 Ns/m³-4000 Ns/m³. It is essential for this mat ( 1 ) that it is hydrophobic. In order to achieve an enhanced acoustical effectiveness a decoupling layer ( 6 ) is foreseen between the microporous stiffening layer ( 2 ) and the vehicle floor ( 8 ). This decoupling layer might be incorporated in the mat ( 1 ) or constituted by the underlaying carpet or sound absorber of the vehicle floor. Further layers or sheets such as adhesive layers, non skid layers, face fabrics or carpets and/or loft layers can be added to the claimed mat.