- 专利标题: ELECTROSTATIC CHARGE IMAGE DEVELOPING CARRIER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
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申请号: EP21195634.7申请日: 2021-09-08
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公开(公告)号: EP4063963A1公开(公告)日: 2022-09-28
- 发明人: WATANABE, Takuro , SASAKI, Kazutsuna , TSURUMI, Yosuke , KADOKURA, Yasuo , SAKAI, Karin
- 申请人: Fujifilm Business Innovation Corp.
- 申请人地址: JP Tokyo 7-3, Akasaka 9-chome Minato-ku
- 代理机构: Haseltine Lake Kempner LLP
- 优先权: JP2021049112 20210323
- 主分类号: G03G9/113
- IPC分类号: G03G9/113 ; G03G9/107
摘要:
An electrostatic charge image developing carrier includes a magnetic particle and a coating resin layer that covers the magnetic particle, and an amount of the coating resin layer that is peeled off from the magnetic particle when the carrier dispersed in water is irradiated with ultrasonic waves, relative to a coating amount of the coating resin layer before ultrasonic irradiation, is 800 mass ppm or more and 2,000 mass ppm or less, and a difference between an initial coating amount of the coating resin layer of a carrier having no travel history and a coating amount of the coating resin layer of a carrier having a travel history and being taken out from an electrostatic charge image developer, relative to the initial coating amount of the coating resin layer, is 0 mass ppm or more and 3,000 mass ppm or less.
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