发明名称 |
Carrier core material, coated carrier, two-component developing agent for electrophotography, and image forming method |
摘要 |
<p>Disclosed is a carrier core material containing at least one metal oxide (M L O) having a melting point of not higher than 1000°C and at least one metal oxide (M H O) having a melting point of not lower than 1800°C, wherein the metal (M H ) for constituting the metal oxide (M H O) has an electrical resistivity of not less than 10 -5 ©·cm. Also disclosed is a two-component developing agent comprising a coated carrier, which comprises the carrier core material coated with a resin, and toner particles. Further disclosed is an image forming method comprising developing an electrostatic latent image formed on a photosensitive member with the two-component developing agent using an alternating electric field. The carrier core material and the coated carrier have high magnetization and are free from occurrence of leakage of electric charge over a wide range of electric field from low electric field to high electric field. According to the two-component developing agent of the invention, an excellent image can be formed.</p> |
申请公布号 |
EP1445656(B1) |
申请公布日期 |
2008.11.05 |
申请号 |
EP20040250659 |
申请日期 |
2004.02.06 |
申请人 |
POWDERTECH CO., LTD. |
发明人 |
KOBAYASHI, HIROMICHI;SHINMURA, ISSEI;ITAGOSHI, TSUYOSHI;SATO, YUJI |
分类号 |
G03G9/08;G03G9/10;G03G9/107;G03G9/113 |
主分类号 |
G03G9/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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