Ceramic toner for electro-photographic printing

Details Ceramic toner for electro-photographic printing Ceramic toner for electro-photographic printing

G - Physics

03

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G03G 9/08 (2006.01) B41M 3/12 (2006.01) C03C 17/00 (2006.01) G03G 9/09 (2006.01) G03G 9/097 (2006.01) G03G 13/01 (2006.01) B41M 1/34 (2006.01)

Patent

CA 2472951

The invention relates to a ceramic toner which is transferable to a high- temperature resistant glass, glass ceramic or ceramic substrate by means of electrophotographic printing and which can be fired in a subsequent temperature process, containing colour pigment particles in addition to special glass flow particles. According to the invention, said ceramic toner is provided with a thermoplastic synthetic matrix which melts in a homogeneous manner on the substrate within a temperature range of 100 ~C - 400 ~C and which, within the temperature range of 300 ~C -500 ~C, vaporises in an almost residue-free manner and/or decomposes in order to obtain a toner which can be transferred especially in a direct printing mode and which has almost no synthetic matrix residue after firing.

L'invention concerne un toner céramique pouvant être transféré sur un substrat en verre, en vitrocéramique ou en céramique, très thermorésistant, par impression électrophotographique et pouvant être cuit, dans le cadre d'un processus thermique subséquent. Ledit toner céramique contient, outre des particules de fondant spéciales, également des particules de pigments colorés. Il est prévu, selon l'invention, que ledit toner présente une matrice thermoplastique qui fond sur le substrat dans une plage de températures allant de 100 à 400 ·C, s'évapore pratiquement sans résidus dans une plage de températures allant de 300 à 500 ·C et/ou se décompose. On obtient ensuite un toner pouvant être transféré, notamment en mode d'impression directe et ne présentant pratiquement pas de résidus de la matrice plastique, après cuisson.

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