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Differences between Scots pine and Norway spruce TMP pulps as revealed bt the HCL method

    Publication: Chapter in Book/Report/Conference proceedingConference paper in proceedingspeer-review

    Abstract

    The HCl method was used to compare pine and spruce TMP pulps. Delignification gave much stronger fibre cleavage by HCl (3.5-5x for Stage 3) indicating that lignin and hemicelluloses protect the fibres from acid attack. Cleavage per fibre for TMP was similar as kraft pulps, while spruce TMP was more sensitive to HCl than pine TMP. A more robust secondary wall and a lower number of dislocations and weak points may be related to the higher refining energy needed for pine TMP pulps
    Original languageEnglish
    Title of host publicationProceedings of International Mecahnical Pulping Conference, Södra Berget, Sundsvall
    PublisherSPCI, The Swedish Association of Pulp and Paper Engineers
    Pages322-324
    Number of pages3
    Publication statusPublished - 2009

    Publication series

    SeriesSPCI meddelande / The Swedish Association of Pulp and Paper Engineers
    ISSN0280-6800

    Keywords

    • HCL method
    • Norway spruce
    • Scots pine
    • Thermomecahnical pulp
    • dislocations
    • refining

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