Method of making a multiple ply paper product containing an outer ply of reclaimed white office waste
US5061345A · kind A · utility
13Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1991 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | Feb 21, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H27/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of producing multi-ply paper product, such as linerboard. A pulp stock of reclaimed, white office waste paper which contains fillers, such as clay and calcium carbonate, toners and ink is applied as a top ply to a base ply of Kraft pulp stock. Both pulp stocks have a pH in the range of 6.0 to 8.0. A dry strength additive, such as cooked starch, is incorporated in the plies and serves to improve the internal strength of the top ply, as well as improving the bond between the plies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.