Process for manufacturing paper and board
US10689809B2 · kind B2 · utility
3Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2017 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Jun 11, 2037 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a process for manufacturing a sheet of paper and/or board from a fibrous suspension, according to which, before the formation of said sheet, added to the fibrous suspension, at one or more injection points, are at least two retention aids respectively: The polymer P2 is added to the fibrous suspension after dissolving, in aqueous solution, the polymer P2 previously obtained by one of the following polymerization techniques: The polymer P2 has a factor F>2,
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.