Sound absorptive protective mat

本发明涉及一种机动车防护垫(1)，也称为接入垫或防护垫。该防护垫包括一个微孔加强层(2)(声学膜)。该层可由多个板组成。总的气流阻力为500-4000Ns/m#+[3]。该防护垫(1)必须是疏水的。为了提高隔声效果，在微孔加强层(2)和机动车地板(8)之间设有一个分离层(6)。该分离层可插入到防护垫(1)中或由底层毯子或机动车地板吸声材料构成。可将另外的层或板例如粘结剂层、防滑层、表面织物或毯层和/或蓬松层添加到防护垫中。 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.