发明名称 |
Toner |
摘要 |
A toner having toner particles containing a binder resin and a colorant; and a first external additive having 0.1 to 3.0 wt% of large silica particles with an average particle size of 20 to 200 nm; a second external additive having 0.1 to 3.0 wt% of small silica particles with an average particle size of 5 to 20 nm; a third external additive having 0.1 to 2.0 wt% of hydrophobic titanium dioxide microparticles with a resistance of 10 5 to 10 12 ©.; and a fourth external additive having at least one of 0.1 to 2.0 wt% of conductive titanium dioxide particles with a resistance of 1 to 10 5 ©. and 0.1 to 2.0 wt% of positively chargeable aluminium oxide particles. Therefore, a thin toner layer with a uniform toner amount is formed on a toner carrier and stable charge distribution and toner flowability are maintained for a long time, thereby resulting in prevention of fog and toner scattering, and improvements in developing efficiency and toner durability.
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申请公布号 |
EP1450212(A2) |
申请公布日期 |
2004.08.25 |
申请号 |
EP20040004050 |
申请日期 |
2004.02.23 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
LEE, DUCK-HEE;EUN, JONG-MOON |
分类号 |
G03G9/08;G03G9/097;(IPC1-7):G03G9/08 |
主分类号 |
G03G9/08 |
代理机构 |
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地址 |
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