发明名称 |
MAGNETIC CARRIER, TWO-COMPONENT DEVELOPER, REPLENISHING DEVELOPER, AND IMAGE FORMING METHOD |
摘要 |
A magnetic carrier includes resin-filled magnetic core particles including porous magnetic particles whose pores are filled with a resin, and resin coating layers on the surfaces of the resin-filled magnetic core particles. The porous magnetic particles have specific electrical properties. |
申请公布号 |
US2014356781(A1) |
申请公布日期 |
2014.12.04 |
申请号 |
US201414290738 |
申请日期 |
2014.05.29 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
Minagawa Hironori;Iida Wakashi;Sugahara Nobuyoshi;Yoshifuku Minoru;Onozaki Yuto |
分类号 |
G03G9/00 |
主分类号 |
G03G9/00 |
代理机构 |
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代理人 |
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主权项 |
1. A magnetic carrier comprising:
resin-filled magnetic core particles containing porous magnetic particles having pores therein and a resin present in the pores; and resin coating layers coating the surfaces of the resin-filled magnetic core particles, the resin coating layer including a coating resin, wherein: (i) the porous magnetic particles are made of Mn—Mg—Sr ferrite; (ii) the porous magnetic particles have a specific resistance in the range of 1.0×107 Ω·cm to 1.0×108 Ω·cm at an electric field intensity of 300 V/cm; and (iii) the porous magnetic particles have an electrical breakdown at electric field intensity in the range of 1,000 V/cm to 10,000 V/cm, and wherein: (iv) the magnetic carrier has a specific resistance in the range of 1.0×107 Ω·cm to 1.0×109 Ω·cm at an electric field intensity of 2,000 V/cm; (v) the magnetic carrier has a specific resistance in the range of 2.0×107 Ω·cm to 2.0×109 Ω·cm at an electric field intensity of 1,000 V/cm; (vi) the magnetic carrier has an electrical breakdown at electric field intensity in the range of 1,000 V/cm to 15,000 V/cm; and (vii) the magnetic carrier exhibits a current in the range of 8.0 μA to 50.0 μA when a voltage of 500 V is applied thereto. |
地址 |
TOKYO JP |