Production of paper
US5514249A · kind A · utility
28Cited by
10References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Jul 6, 2014 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Paper is made by adding nonionic or anionic polymeric retention aid to a suspension that contains a high electrolyte content, shearing the flocculated suspension, aggregating the sheared suspension by adding anionic particulate material (especially bentonite), and draining the suspension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.