Method for reducing the water vapour permeability of paper
US5358790A · kind A · utility
12Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1991 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Nov 15, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method of reducing the water vapor permeability of a sheet of paper, which comprises the step of coating the paper sheet with a film of 5-30 g/sq.m. of a coating medium consisting of a rosin sizing dispersion containing additives improving the film-forming properties of the coating medium, which additives include surfactants and waxes. It also deals with a paper so produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.