Mehrschichtiges Verbundmaterial

摘要

The invention relates to a multi-layer composite material which consists of at least two thermoplastic layers. At least one first layer is a of thermoplastic fiber fleece (20). The layers are bonded to one another at bonding zones by thermal bonding and the materials of the layers are at least partially fused together in the area of the bonding zones. Said bonding zones impart a three-dimensional structure to the composite material. The inventive composite material is characterized in that the three-dimensional structure of at least one bonding zone has the shape of a curvate edgeless trough in the cross-section and the longitudinal section. Said trough is configured by a bottom area forming a bonding center and by lateral areas which are attached thereto without transition. The layers are thermobonded to one other only in the bottom area of the trough.