Patent ID: 6444089
Filing Date: 2002-09-03
Classification: D21F,D21H

Abstract:
Method of producing a paper having a three-dimensional pattern of alternating raised and recessed portions, by impulse drying, comprising the steps of:passing the wet paper web through at least one press nip having a rotatable heated roll; and pressing a three-dimensional pattern of alternating raised and recessed portions into the wet paper web during passage through the press nip using one of a patterned wire and a pattern on the heated roll, said pattern being pressed into the wet paper web against a counter means, wherein the wet paper web has a varying material composition as seen in a thickness direction, and at least in a layer intended to be closest to the heated roll, contains an amount of a material that does one of softens, melts and hardens in the temperature interval 100-400Â° C. to stabilize the pattern structure that has been given the paper.