Evaluating the quality of recycled fibre material with a new concept

Janne T. Keränen, Elias Retulainen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsProfessional


    Users of recycled fiber material have to overcome three main challenges: price, quality, and availability. The question of the price, quality and availability are interconnected, and there is a need for evaluating the quality of recycled paper also on the fiber level. Today, the average fiber age of recycled paper is low; for most areas and grades it is still lower than 1. Therefore, the characteristic phenomena in the paper recycling loop are not caused by the degradation of individual fibers, but by a blending process in which different fiber grades and non-fiber components are blended in a non-optimal way. A novel method is introduced for evaluating the quality of fiber material using a new parameter, the fiber integrity value. The approach is based on the fact the strength yielding ability of the material is of primary importance, and only sufficient strength level makes it possible to optimize other quality properties.
    Original languageEnglish
    Title of host publicationProgress in Paper Physics Seminar 2016
    Subtitle of host publicationProceedings
    Publication statusPublished - 2016
    MoE publication typeD3 Professional conference proceedings
    EventProgress in Paper Physics Seminar, PPPS 2016 - Darmstadt, Germany
    Duration: 22 Aug 201626 Aug 2016


    ConferenceProgress in Paper Physics Seminar, PPPS 2016
    Abbreviated titlePPPS 2016


    • recycling
    • paper
    • fibers
    • quality
    • strength


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