Crosslinked vinyl alcohol/vinylamine copolymers for dry end paper addition
US5281307A · kind A · utility
68Cited by
12References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1993 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Jan 13, 2013 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/76
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An improved papermaking process has been developed to enhance the properties of the resultant paper or paper-type products. The process involves adding a polyvinyl alcohol/vinylamine copolymer along with a crosslinking agent at the dry end step of a conventional papermaking process. Improvements in the properties of the resultant paper products are observed, especially at low levels of copolymer addition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.