Inter-fiber Bonding Effects of Beating, Starch or Filler

Atsushi Tanaka, Eero Hiltunen, Heikki Kettunen, Kaarlo Niskanen

    Research output: Contribution to journalArticleScientificpeer-review

    23 Citations (Scopus)


    Adding filler generally impairs the mechanical properties of paper. Beating and addition of starch can be used to compensate for this. When the fiber network density (excluding fiber mass) is used as a measure of network structure, addition of filler caused exactly the opposite effect from beating for all inplane mechanical properties except elastic stiffness. Elastic stiffness decreased less with addition of filler than it did with less beating. Addition of starch improves the strength properties without changing the structure of sheets made solely from kraft pulp, while beating or addition of filler changes their structure. In mixture sheets, consisting of kraft pulp and TMP, addition of starch had no effect on the in-plane properties. Out-of-plane fracture energy improved with addition of starch, irrespective of whether TMP was included in the furnish or not.
    Original languageEnglish
    Pages (from-to)306-312
    Number of pages7
    JournalNordic Pulp and Paper Research Journal
    Issue number4
    Publication statusPublished - 2001
    MoE publication typeNot Eligible


    • Beating
    • Starch
    • Filler
    • Fiber bonding
    • Fiber network
    • Fracture
    • Mechanical properties
    • Paper properties


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