Pulp dewatering process
US4969976A · kind A · utility
66Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1989 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Mar 28, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/68
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Dry market pulp is made by shearing a cellulosic suspension and draining it through a screen to form a pulp sheet which is then dried, and the productivity of the process is increased by adding a water soluble cationic polymer before the shearing and bentonite or other suitable inorganic material after the shearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.