SOUND PROTECTION SCREEN FOR A MOTOR VEHICLE ENGINE COMPARTMENT

• Main Authors: Pothier, Marc, Ribes, Stéphane
• Format: Patent
• Language: English
• Published: 14.04.2022
• Subjects: LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR

The invention relates to a sound protection screen with an external shell made of a moulded thermoplastic material, an internal sub-layer based on resiliently compressible moulded polyurethane foam. The sub-layer is over-moulded with the rear side of the external shell. by over-moulding The shell is based on a sheet of thermoformed thermoplastic material and has a thickness between 0.2 and 1 mm. The shell can be a two-layered shell, with an external layer based on polyolefin. The external layer having at the side of the sub-layer, in order to allow adhesion between the shell and the sub-layer, with a rear layer based on a thermoplastic material that adheres to the foam. The shell can also be a single layer based on polyolefin, the rear side being subjected to a surface treatment that allows the adhesion to the sub-layer to be improved.