Toner coated with thin film

G - Physics – 03 – G

Patent

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Details

G03G 9/093 (2006.01) G03G 9/08 (2006.01) G03G 9/087 (2006.01)

Patent

CA 2495831

Satisfactory anti-blocking property of powder toner can be realized, while avoiding increase in softening temperature of the powder toner, by coating the surface of a low melting point powder toner with a thermosetting resin. This leads to the realization of toner fixing at lower temperatures and is particularly effective when using a urea resin as the thermosetting resin or employing polymerized toner as the powder toner. Use of the surface-coated powder toner with a low softening temperature and less blocking tendency makes possible reduction of thermal energy and time required for fusing, thereby realizing energy-saving and high-speed fusing process.

L'invention concerne un toner en poudre à bas point de fusion dont la surface est revêtue d'une résine thermodurcissable. Le toner en poudre permet d'obtenir une propriété satisfaisante d'antiadhérence sans élévation de la température de ramollissement, ce qui permet un fixage à basse température. Un tel effet est manifestement important en particulier lorsque la résine thermoplastique est une résine à base d'urée et que le toner en poudre est un toner de polymérisation. L'utilisation du toner à surface recouverte, à basse température de ramollissement et à tendance faible à l'adhérence de contact, conduit à un fixage à basse température, ce qui permet de réduire l'énergie calorifique et le temps de fixage et par conséquent d'économiser de l'énergie et d'accélérer l'étape de fixage.

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