METHOD FOR BONDING AT LEAST TWO PLIES OF TISSUE PAPERS TO EACH OTHER
The present invention relates to a method for autogenously bonding at least two plies of tissue paper with a basis weight from 10 to 45 g/m<2> comprises the steps of laying the plies face-to-face, bonding the plies to each other with the help of ultrasonic means, the at least one ultrasonic horn of the ultrasonic means oscillates perpendicular to the surface to the tissue paper plies The invention also relates to a multi-ply tissue paper produced by the method.