Wet end chemicals for dry end strength in paper
US9951475B2 · kind B2 · utility
1Cited by
123References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2017 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Jan 4, 2037 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The disclosure provides methods and compositions for increasing the dry strength of paper. The invention utilizes a tailored strength agent whose size and shape is tailored to fit into the junction points between flocs of a paper sheet. The strength agents is in contact with the slurry for just enough time to collect at the junction points but not so much that it can migrate away from there.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.