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[article]
Titre : |
UV Flexographic Inks : Correlation between rheology and press performance |
Type de document : |
texte imprimé |
Auteurs : |
Robert J. Geiger, Auteur ; Charles A. Henderson, Auteur |
Année de publication : |
2003 |
Article en page(s) : |
p. 71-74 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Index. décimale : |
667.4 Encres |
Résumé : |
The secret to developing a good printing UV flexographic (flexo) ink is related to pigment wetting and the rheology of the formulated system. Ultimately, the goal in formulating UV flexographic inks is to have a system that is very low in viscosity and remains low in viscosity under any type of shear or stress (also known as Newtonian). (1)
Unfortunately, the introduction of pigments into a Newtonian liquid produces considerable deviations from Newtonian behavior. Therefore, by understanding the rheological behavior of an ink system, it is possible to achieve an ink system that is easy to print and has high gloss and excellent color strength. In this paper, we describe a rheology method that is used to measure thixotropy known as the "step-shear" test. This step-shear test simulates the printing process on a flexo press. The rheology data is correlated to information collected from flexo trials performed in house at UCB Chemicals Corp. |
Note de contenu : |
- Rheology bakground
- Pigment wetting
- Sample preparation
- Carbon black ViaFlex 165Flex100 results
- ViaFlex100 resultas in other UCB resins |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12142 |
in PAINTINDIA > Vol. LIII, N° 5 (05/2003) . - p. 71-74
[article]
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