Method for increasing the adhesion between the first surface of a first web-type material and a first surface of a second web-type material

A method for increasing the adhesion between the first surface of a first web-type material and a first surface of a second web-type material, said method comprising:

• feeding the first web-type material and the second web-type material continuously and with identical web direction to a laminating gap, in which the first web-type material and the second web-type material are laminated together each by their first surface,
• treating both first surfaces of the first web-type material and of the second web-type material over the full area with a plasma, specifically such that the plasma, beginning ahead of the laminating gap on into the laminating gap, acts continuously on the two first surfaces,
• wherein the laminating gap is formed by a pressure roll and a counter-pressure roll, and at least one of the surfaces of the rolls, or both, is or are furnished with a dielectric,
• and the first web-type material has a layer of adhesive arranged in the first web-type material in such a way that it forms the first surface of the first web-type material.