Patent ID: 7833599

Claim:
A process for the production of a composite material ( 1 ) consisting of four layers with a plastic layer ( 4 ) that has release properties with respect to adhesives consisting of locating materials producing the release properties within the plastic layer, wherein a first web ( 2 ) is provided in production of the composite material ( 1 ) on one side of which a layer of adhesive ( 3 ) is located, and said adhesive layer is always coextruded and directly bonded together with the plastic layer ( 4 ) with the release properties, which is in turn directly bonded to a second web ( 5 ); and wherein said first web and said second web is selected from the group consisting of paper, metal foil, and non-woven fabric; and providing the first web and the second web simultaneously in a spaced apart position; and extruding the adhesive layer ( 3 ) and the plastic layer ( 4 ) with the release properties between the two webs ( 2 and 5 ); and forming the bond directly with the two webs.