Strength additive system and method for manufacturing a web comprising cellulosic fibres
US11242653B2 · kind B2 · utility
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11References
18Claims
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Key dates
| Filing date | Jun 15, 2018 |
| Grant date | Feb 8, 2022 |
| Priority date | — |
| Expiry date | Aug 14, 2038 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A strength additive system for manufacturing paper, board, tissue or the like includes preferably as separate components, a cationic strength agent, such as a cationic polymer with aldehyde functional groups, and an anionic copolymer obtained by polymerization of a reaction mixture including (meth)acrylamide and anionic monomers, the standard viscosity of the obtained copolymer being in a range of 1.5-5.0 mPas. A method for manufacturing of a paper, board, tissue or the like is further disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.