Method for dewatering paper
US4795531A · kind A · utility
67Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1987 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Sep 22, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of enhancing the dewatering of paper during the papermaking process which includes adding a low molecular weight cationic coagulant and then colloidal silica and a high molecular weight flocculant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.