Multi-ply paperboard prepared from recycled materials and methods of manufacturing same
US6669814B2 · kind B2 · utility
18Cited by
24References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2002 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Mar 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31808
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention, in one aspect, relates to a multi-ply paperboard having at least three inner plies and, in some aspects, a top liner and a back liner, wherein the multi-ply paperboard is derived from fiber sources comprising at least about 80% by weight recycled fiber. The multi-ply paperboard of the present invention exhibits strength characteristics comparable those of paperboard prepared from virgin board. In further aspects, the invention relates to methods of making the multi-ply paperboard of the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.