FLUIDIZING AGENT FOR ELECTROPHOTOGRAPHIC TONER, ELECTROPHOTOGRAPHIC TONER AND ELECTROPHOTOGRAPHIC DEVELOPING DEVICE

Japanese Patent JP3145562

B2

PURPOSE: To obtain a developer excellent in developing property, trans-ferability and aging stability of them by using inorg. fine particles having a specified particle diameter surface-treated with silicone oil as a fluidizing agent for an electrophotographic toner and adding the particles to an electrophotographic toner.
CONSTITUTION: Inorg. fine particles having 30-100nm average particle diameter of primary particles are treated with silicone oil added by 2-3mg per 1m2 surface area of the particles to obtain the objective fluidizing agent. This fluidizing agent is added to the surface of a toner to obtain the objective electrophotographic toner. This toner is used in the objective electrophotographic developing device fitted to an electrophotographic recorder in which an electro- static charge image on an electrostatic charge image carrier is developed with a toner for developing an electrostatic charge image to form a toner image and this toner image is electrostatically transferred to a transfer material by bringing a transfer means into contact with the surface of the carrier through the transfer material.

Shinichi Sata
Masayuki Maruta
Yasuhiro Hidaka
Hiroshi Hashizume
Tetsuya Nakamura
Hirotaka Fukuyama

JP8810394A

March 12, 2001

March 31, 1994

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Kao Corporation
Toshiba Corporation

G03G9/087; G03G9/08; G03G15/08; G03G15/09; (IPC1-7): G03G9/08; G03G15/08

JP4337738A
JP651554A
JP62174772A
JP61114248A
JP3121462A
JP470671A
JP61176946A
JP4152354A
JP4152356A
JP62215964A
JP60112052A

Yoshinori Hosoda

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