Sca Hygiene Products Ab

Joakim Jardeby

Anna Nihlstrand

Thami Chihani

Susan Sandberg

A method increases the wet strength of a tissue material, and a tissue material ( &prime;) which has been subjected to the method. The wet strength agent included in the tissue material ( &prime;) has an intrinsic, normal wet strength-increasing effect which can be achieved by a curing course having chemical reactions and/or physical interactions between different reactive sites of the wet strength agent, between different reactive sites of the cellulose fibres, and reaction and/or interaction between the reactive sites of the wet strength agent and of the cellulose fibres, resulting in a network of polymers which is kept together by bonds. The method includes formation of radicals and/or excited conditions with high reactivity in gas phase at atmospheric pressure, wherein the radicals and/or excited conditions increase the number of the reactions and/or interactions and/or the number of the reactive sites and thereby also the number of bonds, so that the strength of the network is increased and the tissue material ( &prime;) is conferred an increased wet strength. The method can be implemented for all tissue paper materials which include cellulose fibres and a suitable wet strength agent.

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Göteborg, Sweden

Joakim Jardeby