Förfarande för hål- eller slitsbildning i ett materialskikt och samtidig sammanfogning av detta skikt med ett annat materialskikt

摘要

A method for forming through apertures in the form of holes and/or slots or slits in a web which is intended to form part of absorbent articles, wherein the web is irradiated with at least one focused electromagnetic beam or particle beam from an irradiating source on at least one of its surfaces and in those web regions in which the apertures are to be formed, wherein the properties of the beam and the duration of the irradiation period are selected so that the material will receive in these regions sufficient energy to melt and/or vapourize and/or pyrolyze and/or burn said material, and wherein resultant molten and/or vapourized and/or pyrolyzed and/or combusted material is esssentially removed.