Method of increasing paper strength
US9920482B2 · kind B2 · utility
2Cited by
117References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2014 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Dec 14, 2034 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/24
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention provides methods and compositions for increasing the strength of a paper sheet. The method involves adding to the paper sheet an amine containing polymer. The amine containing polymer interacts with materials such as GPAM or starch to make the paper stronger in terms including tensile strength, surface strength and bulk strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.