Method for the production of an elastic composite material with a textile surface

Abstract

A method for the production of an elastic composite material with a textile surface. First, a laminate is produced, which has elastic cover layers and a core composed of a nonwoven fabric. Subsequently, the laminate is separated into two strips, each of which has a cover layer and an adhering layer of nonwoven fabric, by tearing open the core.

What is claimed is: 
     
         1 . A method for the production of an elastic composite material with a textile surface, comprising:
 producing a laminate that has elastic cover layers formed of elastic film webs and a core composed of nonwoven fabric, wherein the core of the laminate comprises a slightly consolidated melt-blown fabric having a weight per surface area unit of 5 g/m 2  to 20 g/m 2 , and   subsequently separating the laminate into two strips by tearing open the core, wherein a parting plane runs through the core and the two strips resulting from tearing open the core each have a cover layer and an adhering layer of nonwoven fabric with constant values with regard to material thickness and the weight per surface area unit, within close tolerance limits.   
     
     
         2 . The method according to  claim 1 , wherein the nonwoven fabric of the laminate comprises polyolefin fibers. 
     
     
         3 . The method according to  claim 1 , wherein the elastic cover layers of the laminate have a layer thickness between 20 μm and 100 μm and comprise a styrene block copolymer or a thermoplastic polyolefin elastomer. 
     
     
         4 . The method according to  claim 1 , wherein the nonwoven fabric and the elastic cover layers are glued together. 
     
     
         5 . The method according to  claim 1 , wherein the step of separating comprises grasping the strips separately and pulling them apart by applying tensile forces. 
     
     
         6 . The method according to  claim 1 , wherein the strips are passed over driven rollers and wound up separately. 
     
     
         7 . The method according to  claim 1 , wherein the step of tearing open the core is supported by a blade disposed in a parting plane.