Use of foam in surface treatment of paper
US4597831A · kind A · utility
37Cited by
4References
7Claims
0Family size
Inventor
Key dates
| Filing date | Jun 17, 1985 |
| Grant date | Jul 1, 1986 |
| Priority date | — |
| Expiry date | Jun 17, 2005 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/62
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Paper sheet or board is externally sized by applying to the surface thereof a rosin-based sizing agent in the form of a foam in the production of which the sizing agent itself acts as a foaming agent. After the foam has been applied to the surface of the paper sheet or board, at least a major proportion of the applied foam is mechanically broken down to provide a substantially uniform distribution of the sizing agent over the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.