LUFTSCHALL ABSORBIERENDE MOTORRAUMVERKLEIDUNG FÜR KRAFTFAHRZEUGE, INSBESONDERE MOTORHAUBENVERKLEIDUNG

摘要

An airborne sound-absorbing engine compartment lining for motor vehicles comprises an open-cell, air-permeable foam material layer made from plastic and having a front side and a rear side. The foam material layer is provided on its rear side with a fiber layer made from mineral fibers, the foam material layer having a thickness of less than 6 mm and a specific flow resistivity in the range from about 100 to 1,200 Ns/m³. The fiber layer has a thickness of more than 6 mm and a mass per unit area of less than 800 g/m².