CARRIER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE, ITS PRODUCTION AND IMAGE FORMING METHOD

Japanese Patent JP3508070

B2

PURPOSE: To prevent the peeling or falling of a coating layer from a core material by coating the surface of the core material which is Cu-Zn ferrite particles with a resin having a specified F atom content.
CONSTITUTION: The surface of a core material is coated with a resin having ≥30at.% F content to obtain the objective carrier. The core material is Cu-Zn ferrite particles having 0.1-1.0wt.% P atom content and contg. ≤100ppm residual As. When the carrier is produced by a dry coating method, a coating layer of the resin does not peel or fall from the core material and the occurrence and mixing of free fluororesin are suppressed. Free fluororesin causing filming on a cleaning blade and white spots as an image defect does not exist in a developer at the time of use and the occurrence of image defects such as white spots and background fog is prevented.

JP2001337489	ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER AND MANUFACTURING METHOD OF THE SAME, DEVELOPER AND IMAGE FORMING METHOD
JP3900179	TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT, THERMAL ROLL FIXING METHOD AND FILM-SHAPE HEATING FIXING METHOD
JP3164705	IMAGE FORMATION

Umeno, Tomoyasu
Nakano, Shoichi
Omura, Takeshi
Kozuru, Hiroyuki

JP27666494A

March 22, 2004

November 10, 1994

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KONICA CORP

G03G9/08; C08K5/16; C08L69/00; C09D127/12; C09D133/04; C09D133/16; G03G9/107; G03G9/113; G03G13/08; (IPC1-7): G03G9/107; C08K5/16; C08L69/00; G03G9/113; G03G13/08

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