| 摘要 |
<p>The invention relates to method for increasing the wet strength of a tissue material, and a tissue material (2') which has been subjected to the method. The wet strength agent included in the tissue material (2, 2') has an intrinsic, normal wet strength-increasing effect which can be achieved by means of a curing course comprising 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. According to the invention, the method comprises 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 (2') is conferred an increased wet strength. The invention can be implemented for all tissue paper materials which comprise cellulose fibres and a suitable wet strength agent.</p> |
