Patent ID: 9040437
Filing Date: 2015-05-26
Classification: A61F,B32B,Y10T

Abstract:
1. An elastic laminate comprising: a coextruded film having an elastic outer film layer formed of a styrene-block copolymer and an inner film layer of lesser elasticity than the outer film layer and the inner film layer being made of a polyamide, polymethylmethacrylate, polyoxymethylene, polycarbonate, polyethylene terephthalate, or polybutylene terephthalate or mixtures thereof; an outer polyolefin fleece web; an outer adhesive layer extending continuously between the outer fleece web and the outer film layer, adhering the outer fleece web to the outer film layer, made of a hot-melt adhesive based on a styrene block copolymer, and bonding the outer fleece web and the outer film layer together continuously over full surface regions between the outer fleece web and the coextruded film; an inner polyolefin fleece web; and an inner adhesive layer extending continuously between the inner fleece web and the inner film layer, adhering to the inner fleece web over a full surface region thereof, made of a hot-melt adhesive based on a styrene block copolymer, and forming between the inner fleece web and the inner film layer a bond that is discontinuous and weaker than a bond formed by the outer adhesive layer between the outer fleece web and the outer film layer and that is created by an initial stretching that locally separates the inner fleece web and the inner adhesive layer from the inner film layer and creates a microstructure without a fixed pattern while leaving a multiplicity of separate local bonds between the inner fleece layer and the inner film layer, the inner film layer and the inner fleece web being separated and not bonded together at breaks by the inner adhesive layer between the local bonds.