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Analysis of Tribo-charging Characteristics on Toner Particles in Two-Component Developer

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Tribo-charging characteristics on toner in a two-component developer are affected by various factors such as material component, shape, and methods of tribo-charging or measuring. It is, therefore, important to evaluate tribo-charging behavior in details under certain conditions. Tribo-charging on toner is performed by using a mixing shaker with arm length of 200mm. Rotation speed corresponding with shaking frequency is 150rpm and 180rpm. Charge quantity is measured by the E-SPART method. As toner sample, a negative yellow type of toner based on bisphenol A and polyester resin is used. From the experimental results, it is showed that the q/m dependence on shaking time is saturated at near 5min with a negative value of −20 μC/g. After 5min, the q/m decreases slightly to a constant value of −15 μC/g. Charge quantity on toner shows approximately a parabolic dependence on toner diameter in the region up to 10μm in the twocomponent developer. The charge quantity q on toner is shown to be limited by the upper value deduced from the discharge condition in air and the q at 10μm was about 6fC less than 8.35fC.

Document Type: Research Article

Publication date: January 1, 2005

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.
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