Sca Hygiene Products Ab

Akzo Nobel N.v.

Sca Hygiene Paper Ab

Hans Wallenius

Holger Hollmark

Lennart Reiner

Ingvar B Klerelid

Oliver Struck

Marek Gorzynski

Thomas Billgren

Hans-J&uuml;rgen Lamb

Sussan Sandberg

Bengt Nordqvist

Tissue paper having a bulk between 2 and 8 cm/g and containing an amount of a wet strength agent, wherein the tissue paper contains a wet strength agent in the form of a nitrogen-containing polymer having hydrophobic side-chains. Said tissue paper before converting has a relative wet strength value (RWS) of at least 45%.

Wet strong tissue paper

Method of producing a paper having a three-dimensional pattern of alternating raised and recessed portions, which has been provided in connection with impulse drying, at which the wet paper web ( ) is passed through at least one press nip ( ) comprising a rotatable roll ( ) which is heated and that the paper web during the passage through the press nip is given a three-dimensional pattern of alternating raised and recessed portions either by means of a patterned wire, band or belt and/or by a pattern on the heated roll ( ) and where said pattern is pressed into the paper web against a counter means ( ). The wet paper web before said press nip is exerted to a creping- or other compacting procedure which foreshortens the length of the paper web. The invention also refers to a paper produced by the method, said paper having a high extensibility.

Method of producing an extensible paper having a three-dimensional pattern and a paper produced by the method

A process for producing paper having a three-dimensional structure of alternating raised and recessed portions including passing a wet paper web through a heated press nip so the paper web is simultaneously dried by means of impulse drying and given a three dimensional structure. The heated press nip includes a heated pressure roll with a three dimensional pattern of alternating raised and recessed portions in its surface and a compressible surface. The compressible surface can be a compressible press felt which supports the wet paper web prior to and through the heated press nip. The compressible press felt may be pressed against a resilient compressible surface in the heated press nip away from the heated cylinder. The wet paper web may be a papermaking pulp containing at least 10%, and preferably at least 30% or 50% by weight of a high-yield pulp such as TMP or CTMP.

Method of producing a paper having a three-dimensional pattern

Soft, bulky absorbent paper containing chemithermomechanical pulp

Growing community of inventors

Ljungskile, Sweden

Hans Wallenius