ELECTROSTATIC LATENT IMAGE DEVELOPING CARRIER, ELECTROSTATIC LATENT IMAGE DEVELOPER AND IMAGE FORMING METHOD

PROBLEM TO BE SOLVED: To obtain an electrostatic latent image developing carrier which ensures rapid build-up of the electrostatic charge of a toner at high temperatures and humidity or low temperatures and humidity as well as at ordinary temperatures and humidity, does not cause the sticking of the...

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Bibliographic Details
Main Author MUKOYAMA NAOTAKA
Format Patent
LanguageEnglish
Published 21.04.2000
Edition7
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To obtain an electrostatic latent image developing carrier which ensures rapid build-up of the electrostatic charge of a toner at high temperatures and humidity or low temperatures and humidity as well as at ordinary temperatures and humidity, does not cause the sticking of the carrier, imparts stable electrification properties to the toner over a long period of time and can stably yield a good image. SOLUTION: Fine resin particles and fine metal oxide particles are dispersed in the coating resin layer on the core particles of a magnetic material to obtain the objective carrier. The dielectric constant of the fine metal oxide particle is 5×10-11-50×10-11 F/m and the electric resistance of the fine metal oxide particle is >108 Ω.m. It is preferable that the fine metal oxide particles in the carrier are treated in advance with a coupling agent and the fine metal oxide particles are preferably titanium dioxide treated with a coupling agent.
Bibliography:Application Number: JP19980280935