发明授权
- 专利标题： Magnetic toner and image forming method
- 专利标题（中）： 磁性调色剂和成像方法
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申请号： US09153898申请日： 1998-09-16
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公开(公告)号： US06653036B1公开(公告)日： 2003-11-25
- 发明人: Hirohide Tanikawa , Masami Fujimoto , Takakuni Kobori , Hiroyuki Fujikawa
- 申请人： Hirohide Tanikawa , Masami Fujimoto , Takakuni Kobori , Hiroyuki Fujikawa
- 优先权： JP9-250665 19970916
- 主分类号： G03G9083
- IPC分类号： G03G9083
摘要：
A magnetic toner includes a magnetic toner particle containing a binding resin and a magnetic material. The magnetic material includes a magnetic iron oxide containing 0.10% to 4.00% by weight of an element &agr; belonging to the third period to the seventh period with an atomic number of 11 to 103 and having an electronegativity of 1.0 to 2.5. The solubility S1 of &agr; in the magnetic material at an iron solubility of 0% to 20% is from 10% to less than 44% and the solubility S2 of &agr; at an iron solubility of 80% to 100% is from 5% to less than 30%. The magnetic material contains at least 60% by number of multinuclear magnetic iron oxide particles or at least 60% by number of polyhedral magnetic iron oxide particles having faces at ridgeline portions of hexahedron and/or octahedron multinuclear magnetic iron oxide particles.