Process for the production of paper
US4946557A · kind A · utility
24Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Feb 24, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/68
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for the production of paper by forming and dewatering a suspension of cellulose containing fibers and optional fillers on a wire in the presence of a cationic silica based sol and a cationic polymeric retention agent. The cationic polymeric retention agent is cationic guar gum or a cationic synthetic polymer such as cationic polyacrylamide. The combination of cationic silica sol and cationic polymer retention agent gives improved retention of fines and fillers and eases drainage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.