Plate-shaped sound-absorbing substrate is used as underlay for floor covering and has core layer with lower and upper cover layers

摘要

Plate-shaped sound-absorbing substrate (1) is used as underlay for floor covering and has core layer (2) with lower (3) and upper cover (4) layers. The core layer is composed of a fibrous material and the upper and lower cover layers are made of paper. The density of the fibrous material can be between 220 kg/m3> and 240 kg/m3> and the substrate has a thickness between 8 and 10 mm. The lower and cover layers each have a weight between 65 and 75 g/m2>. The lower cover layer on the side turned away from the core layer has one or more recesses (5).