Title:
IMPROVED DUPLEX LINERBOARD FORMED FROM OLD CORRUGATED CONTAINERS
Document Type and Number:
WIPO Patent Application WO1996038626
Kind Code:
A3
Abstract:
An improved duplex linerboard is formed from old corrugated containers (OCC) by first repulping the OCC and screening it to provide a fine fraction and a coarse fraction. NaHSO3 or H2O2 is applied to the fine fraction and the fine fraction produce a chemically treated fine fraction which is then refined. Coarse fraction is separately refined and the refined coarse fraction pulp is then used to form the bottom ply of a multi-ply board and the refined fine fraction pulp used to form the top ply of the multiply board.
Inventors:
HORNG ARBEIT JWUHSIUNG
Application Number:
PCT/CA1996/000362
Publication Date:
January 23, 1997
Filing Date:
May 30, 1996
Export Citation:
Assignee:
MAC MILLAN BLOEDEL LTD (CA)
International Classes:
D21C5/02; D21H11/14; D21H15/02; D21H27/38; (IPC1-7): D21C5/02; D21H27/38
Foreign References:
| EP0354307A1 | 1990-02-14 | |||
| US5080758A | 1992-01-14 |
Other References:
DATABASE WPI Section Ch Week 8421, Derwent World Patents Index; Class F09, AN 84-129437, XP002015800
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