Rheological properties of thermochromic offset inks

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F10%3A39881423" target="_blank" >RIV/00216275:25310/10:39881423 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Rheological properties of thermochromic offset inks

Popis výsledku v původním jazyce

The objective was to study rheological behaviour of thermochromic offset inks. Thermochromic ink is a composite of a thermochromic pigment and a vehicle. The pigment ie commonly a leuco-dye-developer-solvent system encapsulated in polymeric envelope. Thepolymeric envelope of studied inks was made from melamine formaldehyde resin. The vehicle consists of a binder, in case of offset inks it is a resin, waxes, driers and solvent. The solvents used in studied inks were non-polar compounds with larger molecular weight. The rheological properties of thermochromic inks at 40 °C were similar to Newtonian liquids. Shear viscosity was almost stable through shear rates within the region 100-2000 s-1 and its values were much lower than shear viscosities measuredat 20 °C. The results demonstrate a very dramatic influence of the temperature on the shear viscosity of studied inks, that can result in non-uniform ink transfer in inking unit of printing press.

Název v anglickém jazyce

Rheological properties of thermochromic offset inks

Popis výsledku anglicky

The objective was to study rheological behaviour of thermochromic offset inks. Thermochromic ink is a composite of a thermochromic pigment and a vehicle. The pigment ie commonly a leuco-dye-developer-solvent system encapsulated in polymeric envelope. Thepolymeric envelope of studied inks was made from melamine formaldehyde resin. The vehicle consists of a binder, in case of offset inks it is a resin, waxes, driers and solvent. The solvents used in studied inks were non-polar compounds with larger molecular weight. The rheological properties of thermochromic inks at 40 °C were similar to Newtonian liquids. Shear viscosity was almost stable through shear rates within the region 100-2000 s-1 and its values were much lower than shear viscosities measuredat 20 °C. The results demonstrate a very dramatic influence of the temperature on the shear viscosity of studied inks, that can result in non-uniform ink transfer in inking unit of printing press.

Druh

D - Stať ve sborníku

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

<a href="/cs/project/MEB090906" target="_blank" >MEB090906: Vícefunkční tiskové barvy pro ochranu proti falzifikaci</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of 5th International Symposium on Novelties in Graphics

ISBN

978-961-6045-79-7

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

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Název nakladatele

Univerza v Ljubljani

Místo vydání

Ljubljana

Místo konání akce

Ljubljana

Datum konání akce

27. 5. 2010

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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