Production of newprint, kraft or fluting medium
US4305781A · kind A · utility
43Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1980 |
| Grant date | Dec 15, 1981 |
| Priority date | — |
| Expiry date | Mar 12, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/765
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The drainage and retention properties of an aqueous cellulosic suspension substantially free of filler and which is being used for the production of paper or paper board are improved by including a water soluble high molecular weight substantially non-ionic polymer and a bentonite-type clay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.