Strength agent, its use and method for increasing strength properties of paper
US10273634B2 · kind B2 · utility
30Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2015 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Aug 18, 2035 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a strength agent for paper, board or the like. The strength agent comprises a first component, which is refined cellulosic fibers having a refining level of >70° SR, and a second component, which is a synthetic cationic polymer having a charge density of 0.1-2.5 meq/g, determined at pH 2.7, and an average molecular weight of >300 000 g/mol. The invention relates also to a use of the strength agent and to a method for increasing strength properties of paper, board or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.