Influence of atmospheric plasma activation on sheet-fed offset print quality

M Pykönen, H Sundqvist, M Tuominen, J Lahti, J Preston, Pedro Fardim, Martti Toivakka

    Research output: Contribution to journalArticleScientificpeer-review

    8 Citations (Scopus)

    Abstract

    Plasma activation increased the surface energy of the papers. Furthermore, the polarity of the paper surface increased due to formed polar oxygen containing molecular groups. Due to differences in treatment times laboratory scale plasma treatment formed mainly carboxyl and ester groups, whereas pilot scale treatment induced mainly alcohol, ethers, aldehydes and/or ketones on paper surfaces. Printing evaluation showed that plasma activation influences both ink and water absorption properties. According to print tack results plasma activation led to Faster ink-setting. With hydrophobic surface-sized paper plasma activation influenced the ink transfer, print gloss and density by changing dampening water absorption properties. The difference in surface chemistry with laboratory scale plasma treated samples was also reflected in the print quality properties. SEM imaging showed that too intense plasma activation can cause topography changes in addition to of the surface chemistry changes.
    Original languageUndefined/Unknown
    Pages (from-to)181–188
    Number of pages8
    JournalNordic Pulp and Paper Research Journal
    Volume23
    Issue number2
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed

    Keywords

    • ink-paper interactions
    • plasma activation
    • sheet-fed offset printing
    • surface chemistry
    • surface energy

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