Duplex linerboard formed from old corrugated containers

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

D - Textiles, Paper

21

C

D21C 5/02 (2006.01) D21H 11/14 (2006.01) D21H 15/02 (2006.01) D21H 27/38 (2006.01)

Patent

CA 2177648

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 multi- ply board.

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