The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 2002
Filed:
Jun. 11, 2001
Joakim Jardeby, Göteborg, SE;
Anna Nihlstrand, Göteborg, SE;
Thami Chihani, Mölnlycke, SE;
Susan Sandberg, Onsala, SE;
SCA Hygiene Products AB, Gothenberg, SE;
Abstract
A method increases the wet strength of a tissue material, and a tissue material ( ′) which has been subjected to the method. The wet strength agent included in the tissue material ( ′) 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 ( ′) 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.