Use of additives in pulp bleaching processes to preserve pulp strength
US4298428A · kind A · utility
6Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1980 |
| Grant date | Nov 3, 1981 |
| Priority date | — |
| Expiry date | Aug 7, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/1036
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Improved pulp strength and brightness of chemically produced pulp can be obtained by treating the pulp with the addition of 0.05-0.5% based on the weight of the dry fiber of certain amine materials in the hypochlorite bleaching stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.