Soundproofing material for motor vehicle trim components has dense layer formed by thermoplastic material applied in powder form and jeated

摘要

The soundproofing material (1) comprising at least one elastic layer (11) and a dense layer (12) has the dense layer made by depositing a thermoplastic material in powder form on one surface of the elastic layer or a layer of material associated with it and then heating the powder e.g. by infrared radiation, so that is partially fused and adheres to the elastic layer. The soundproofing material (1) comprising at least one elastic layer (11) and a dense layer (12) has the dense layer made by depositing a thermoplastic material in powder form on one surface of the elastic layer or a layer of material associated with it and then heating the powder e.g. by infrared radiation, so that is partially fused and adheres to the elastic layer. The elastic layer can be a textile felt or a porous foam material, to which the powder can be applied in a layer of varying thickness, The dense layer has a resistance to the passage of air of between 500 and 4000 Nsm-3 and a surface mass of 100-1000 g/m2. The soundproofing material complex can also be thermoformed.