Abstract
Delamination of board in sheet fed offset printing has
become a frequent source of complaints. Both printing
parameters and
structural properties of board affect delamination
tendency however little attention has been given to the
printing
parameters. The purpose of this study was, through
printing trials and physical simulation, to find out the
effect of printing
parameters on delamination.
High printing speed promotes delamination. Similarly,
high ink viscosity at low shear rate, among other ink and
printing
parameters, had an obvious effect on delamination. Both
printing speed and ink properties affect the maximum ink
tack
in ink splitting. The force at the delaminating
interface is proportional to this ink tack. Other
printing parameters which
contributed to delamination of board to a certain degree
were printing press configuration, number of dry backtrap
nips, ink
density, printing blanket compressibility, blanket
smoothness, nip pressure, nip indentation, and
fibre-orientation in the
printing sheet.
Original language | English |
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Pages (from-to) | 315 - 322 |
Journal | Appita Journal |
Volume | 63 |
Issue number | 4 |
Publication status | Published - 2010 |
MoE publication type | A1 Journal article-refereed |