Method of manufacture of paperboard
US4913773A · kind A · utility
70Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1989 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Feb 17, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H15/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of producing a multi-ply paperboard comprising at least one ply high bulk fibers sandwiched between at least two plies of conventional papermaking fibers. In a preferred embodiment, high bulk fibers characterized by twists, kinks and curls are produced by mechanical deformation without substantial fibrillation or breakage of the fibers, as by dry hammermilling or wet milling of the fibers. An aqueous foam furnish is preferred for laying the ply containing high bulk fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.