EcoFracSmart: A New Stock Preparation Process for Testliner, 2007 TAPPI 8th Research Forum on Recycling

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This work summarizes a proof-of-concept for EcoFracSmart, a process technology toolbox for stock preparation of recovered fibres. We developed and demonstrated a new energy-efficient and flexible process for paper products based on a variety of recycled fibre sources, ranging from old corrugated containers (OCC) to household magazines, newsprint and office waste.

The EcoSmart concept implies the extraction of impurities as early as possible in the repulping process, when particles are still large and easy to separate. Thereafter, hydrocyclone fractionation separates fibres in sub-streams with different quality, bonding properties and flexibility. Thereby energy intensive refining can be limited to the fibres that need it. The availability of more homogeneous fibre flows after fractionation allowed tuned additions of wet-end starch. We installed a multifun