发明公开
EP1925982A2 Toner, image forming apparatus using the same, image forming method using the same, and process cartridge
有权
调色剂,使用其的成像装置,使用该成像装置的成像方法以及处理盒
- 专利标题: Toner, image forming apparatus using the same, image forming method using the same, and process cartridge
- 专利标题(中): 调色剂,使用其的成像装置,使用该成像装置的成像方法以及处理盒
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申请号: EP07121212.0申请日: 2007-11-21
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公开(公告)号: EP1925982A2公开(公告)日: 2008-05-28
- 发明人: Nakayama, Shinya , Kotsugai, Akihiro , Iwamoto, Yasuaki , Shitara, Yasutada
- 申请人: Ricoh Company, Ltd.
- 申请人地址: 3-6, Nakamagome 1-chome, Ohta-ku Tokyo 143-8555 JP
- 专利权人: Ricoh Company, Ltd.
- 当前专利权人: Ricoh Company, Ltd.
- 当前专利权人地址: 3-6, Nakamagome 1-chome, Ohta-ku Tokyo 143-8555 JP
- 代理机构: Barz, Peter
- 优先权: JP2006315650 20061122
- 主分类号: G03G9/08
- IPC分类号: G03G9/08 ; G03G9/097
摘要:
A toner that is excellent in low-temperature fixing property, offset resistance, storage stability, charge rising property, charge stability with time and pulverizability and allows for forming high-quality images over a long period of time The toner contains at least a binder resin, a colorant and a charge controlling agent, wherein the charge controlling agent contains an aromatic oxycarboxylic acid metal compound having a trivalent or more central metal, the binder resin comprises a polyester resin (A) having a softening point Tm (A) of 120°C to 160°C and a polyester resin (B) having a softening point Tm (B) of 80°C to less than 120°C, and at least any one of the polyester resins (A) and (B) contains 1,2-propane diol at 65 mol% or more in a divalent alcohol component and can be obtained by condensation polymerizing an alcohol component substantially composed of only an aliphatic alcohol with a carboxylic acid component,
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