Method for increasing the wet strength of a tissue material
US6423179B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2001 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Jun 11, 2021 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method increases 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 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 (2′) is conferred an increased wet strength. The method can be implemented for all tissue paper materials which include cellulose fibres and a suitable wet stre…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.