THREE DIMENSIONALLY STRUCTURED NON-WOVEN FIBER AGGREGATE ANDPROCESS FOR ITS MANUFACTURE

摘要

The invention relates to a flat nonwoven fiber aggregate with three-dimensional structure which consists of filament layers which alternate perpendicularly to the plane of the surface and layers of denser short fibers which are thermally bound to said filament layers in a flat or dotwise manner. Said wide-meshed filament layers represent a loose structure, a grid or a web. Said layer of short fibers are characterized by repetitive crease- or wave-shaped elevations. According to the inventive method, all layers of the laminate are subjected to a common shrinkage process at a temperature that lies between the softening and the melting temperature of the material of the loose structure.