Patent ID: 7976664

Claim:
Method for producing packaging material in web form comprising: conveying a barrier layer, a carcass layer which exhibits through holes, openings or slits, and a film of laminant thermoplast to a press nip comprised of an impression roller, the impression roller comprising a metal core exhibiting a circular-cylindrical jacket surface, which jacket surface is faced with an inner facing layer of an elastic material, exhibiting a first hardness and a first thickness, wherein an outer facing layer of an elastic material, exhibiting a second hardness and a second thickness, with the first hardness being greater than the second hardness and with the first thickness being greater than the second thickness, is arranged on the outside of the inner facing layer; pressing together the barrier layer, the carcass layer and the film of laminant thermoplast in the press nip so the outer facing layer of the impression roller deforms in areas where the carcass layer is present and penetrates into the through holes, openings or slits where the carcass layer is not present to adhere the barrier layer to the film of laminant thermoplast at the through holes, openings or slits and produce a film laminate in web form comprising the carcass layer of paper or carton exhibiting the through holes, openings or slits, the barrier layer on one side of the carcass layer, and the film of laminant thermoplast arranged between the carcass layer and the barrier layer.