| Titre : |
UV curing of white cationic flexographic inks |
| Type de document : |
texte imprimé |
| Auteurs : |
Tom Scherzer, Auteur ; Ulrich Decker, Auteur ; Igor Janovsky, Auteur ; Reiner Mehnert, Auteur |
| Année de publication : |
1999 |
| Article en page(s) : |
p. 36-47 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Cationic UV curable formulations such as flexographic printing inks or white base coatings are slowly curing systems. The question if an increase of the curing speed can be obtained by applying a XeCl* excimer instead of a medium pressure mercury lamp of equal electric power could be answered : replacing by a 308 nm excimer lamp allows to reach about 20-30% higher cure speed in the curing of cationic white flexo inks. In addition, real-time FTIR experiments on UV curing of cationic flexographic inks show a clear effect of temperature on polymerization rate. Actinometry of curing light sources provides valuable information about photon rates which can be used to estimate cure speeds expected under technological curing conditions. |
| Note de contenu : |
- Curing of white ink is the speed determining step
- Can the cure speed be increased by applying a XeCl* excimer lamp?
- General mechanism of cationic curing and evaluation of kinetic parameters
- The cure speed concept
- Weakness of the cure speed concept
- Real-time Fourier transform infrared spectroscopy
- Determination of the cure speed derived from conversion vs. time profiles
- Is UV curing accelerated by heat?
- Heat accelerates postcuring
- Printing trials using the flexographic press "Soloflex"
- Cure speed with excimer lamp is clearly higher
- Chemical actinometry of polychromatic and monochromatic radiation
- Measurement of the 313 nm light
- Measurement of the polychromatic light
- Polymerisation rate at monochromatic is higher than during polychromatic exposure
- Discussion of the results
- Theoretical cure speed estimations are in accordance with the experimental findings
- Conclusions |
| En ligne : |
https://drive.google.com/file/d/1U7mokSXCQJoo9_f1qUAZG3quAS6arTpC/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11196 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 6/99 (06/1999) . - p. 36-47
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