ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, TONER CARTRIDGE, AND METHOD FOR FIXING TONER IMAGE

• Main Authors: KURAMOTO SHINICHI, NAGAYAMA MASASHI, SAWADA TOYOSHI, SHU HIYO, AOKI MITSUO, HASEGAWA HISAMI, SHIRAISHI KEIKO
• Format: Patent
• Language: English
• Published: 30.09.2004
• Edition: 7
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a toner and a fixing method excellent in fixability and hot storage resistance even in the case of a fixing device using a low surface pressure thin roller, and to provide a black colorant substitutable for carbon black. SOLUTION: The electrostatic charge image developing toner is used in a fixing device in which a toner image is heat-fixed by passing a support which supports the toner image between two rollers, the thickness of the fixing roller brought into contact with the toner image supporting surface is ≤1.0 mm, and surface pressure applied between the two rollers ((roller load)/(contact surface area)) is ≤1.5×105Pa. The toner includes a resin, a wax and a colorant as essential components, wherein a black iron oxide compound including 10-45 wt.% (expressed in terms of Ti atoms) of a titanium compound based on the amount of Fe atoms is used as the colorant. COPYRIGHT: (C)2004,JPO&NCIPI