Influence of surface chemical composition on UV-varnish absorption into permeable pigment-coated paper

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Maiju Pykönen, Kenth Johansson, Roger Bollström, Pedro Fardim, Martti Toivakka
Publication year: 2010
Journal: Industrial & Engineering Chemistry Research
Journal acronym: IND ENG CHEM RES
Volume number: 49
Issue number: 5
Start page: 2169
End page: 2175
Number of pages: 7
ISSN: 0888-5885
eISSN: 1520-5045


Fluorocarbon, organosilicon, and hydrocarbon plasma coatings were used to modify the surface permeable pigment-coated paper, and their impact on UV-varnish absorption was investigated. According to mercury porosimetry results, the plasma coatings had no influence on the porous structure of the paper. X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) results showed characteristic surface chemical compositions for each plasma coating. The fluorocarbon plasma coating increased the UV-varnish contact angles significantly, whereas the hydrocarbon plasma coating had no clear influence. When the UV varnish was applied with a flexography unit including nip pressure, the role of surface chemical composition seemed to become minimal. The viscosity of the UV varnish was shown to impact the absorption rate with and without external pressure.

Last updated on 2020-22-02 at 05:20