Process for the production of paper
US4964954A · kind A · utility
27Cited by
8References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1988 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Oct 26, 2008 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for the production of paper by forming and dewatering a suspension of papermaking fibres on a wire. The formation and dewatering take place in the presence of a cationic polymeric synthetic retention agent, preferably a cationic polyacrylamide, an anionic inorganic colloid and a polyaluminum compound. The process which is carried out at a stock pH above 5 gives an improved dewatering and an improved retention of fine fibres and optional fillers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.