Duplex linerboard formed from old corrugated containers

Details Duplex linerboard formed from old corrugated containers Duplex linerboard formed from old corrugated containers

1995-05-31

1996-04-02

Lacey, David L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162130, 162147, 162149, 162189, 162 55, D21F 1100, D21F 1112, D21H 1114

Patent

active

055037100

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. NaHSO.sub.3 or H.sub.2 O.sub.2 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.

REFERENCES:
patent: 3791917 (1974-02-01), Bolton, III
patent: 4052918 (1985-03-01), Mackie et al.
patent: 4753710 (1988-06-01), Langley et al.
patent: 4781793 (1988-11-01), Halme
patent: 4888092 (1989-12-01), Prusas et al.
patent: 4999084 (1991-03-01), Lang et al.
patent: 5061345 (1991-10-01), Hoffman
patent: 5080758 (1992-01-01), Horng
patent: 5147505 (1992-08-01), Altman
Optical refining conditions for development of OCC pulp properties by Ronal J. DeFoe, vol. 76, No. 2 Tappi Journal.
Bleached Pulps for printing & writing papers from old corrugated containers, by X. T. Nguyen, A. Shariff, P. F. Earl and R. J. Eamer, Progress in Paper Recycling, May 1993.

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