Patent ID: 6607810
Filing Date: 2003-08-19
Classification: B29C,B29K,B29L,B32B,D04H,Y10T

Abstract:
A multi-layer composite (10) comprisingat least two layers (12, 14) made out of thermoplastics, wherein at least one first layer (12) is a nonwoven layer comprising thermoplastic fibers (20), wherein the layers (12, 14) are at least thermally bonded with each other in bonding zones (26), wherein the materials of the layers (12, 14) in the area of the bonding zones (26) are at least partially melted together, and wherein the bonding zones (26) impart a three-dimensional structure to the composite (10); wherein the three-dimensional structure of at least one bonding zone (26) in the transverse and longitudinal section resembles a curved cavity (28) without any edges, which is formed by a floor area (30) comprising a bonding center (36), as well as by seamlessly adjacent lateral areas (32, 34); and wherein the immersion depth of the bonding center (36) into the second layer (14) measures 5-50% of the initial thickness of the second layer (14).