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

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Pykönen M, Sundqvist H, Tuominen M, Lahti J, Preston J, Fardim P, Toivakka M
Publisher: AB SVENSK PAPPERSTIDNING
Publication year: 2008
Journal: Nordic Pulp and Paper Research Journal
Journal acronym: NORD PULP PAP RES J
Volume number: 23
Issue number: 2
Start page: 181
End page: 188
Number of pages: 8
ISSN: 0283-2631


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.


Keywords

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

Last updated on 2019-21-10 at 03:48