Paper making process using cationic polyacrylamides and crosslinking compositions for use in same
US8197640B2 · kind B2 · utility
4Cited by
4References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 20, 2007 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Mar 28, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/455
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to methods for manufacturing paper or paperboard with improved strength, the methods comprising the addition of the reaction product of a cationic polyacrylamide and an aqueous aldehyde generating compound or a glyoxal releasing compound, or glyoxal itself, prepared at the mill site at high concentrations, then diluted and added into a fiber furnish prior to forming or drying of the paper or paperboard sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.