ONP REUSE WITHOUT DEINKING - SHORT SEQUENCE RECYCLING

For newsprint mills without deinking facilities, or with insufficient recycle fibre availability, short sequence recycling of old newsprint (ONP) offers a route to additional recycle content with zero or minima l capital investment. The simple addition of appropriately formulated chemistry to the pulper before the addition of the ONP leads to the fo llowing advantages over pulping this furnish without chemical: fibres of 51 to 55% ISO brightness (a 6 to 15 point gain); a relatively clear filtrate; and a papermaking fibre slurry with a reduced tendency for ink deposition on the papermaking machine hardware.