发明授权
US09557671B2 Electrostatic image developing toner, developer, and image forming apparatus
有权
静电图像显影调色剂,显影剂和图像形成装置
- 专利标题: Electrostatic image developing toner, developer, and image forming apparatus
- 专利标题(中): 静电图像显影调色剂,显影剂和图像形成装置
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申请号: US14629954申请日: 2015-02-24
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公开(公告)号: US09557671B2公开(公告)日: 2017-01-31
- 发明人: Ryuta Chiba , Shinya Nakayama , Hiroshi Yamada , Minoru Masuda , Akinori Saitoh , Hideyuki Santo , Shinsuke Nagai , Akihiro Takeyama , Hiroyuki Takeda , Tsuyoshi Sugimoto , Suzuka Amemori , Kohsuke Nagata
- 申请人: Ryuta Chiba , Shinya Nakayama , Hiroshi Yamada , Minoru Masuda , Akinori Saitoh , Hideyuki Santo , Shinsuke Nagai , Akihiro Takeyama , Hiroyuki Takeda , Tsuyoshi Sugimoto , Suzuka Amemori , Kohsuke Nagata
- 申请人地址: JP Tokyo
- 专利权人: Ricoh Company, Ltd.
- 当前专利权人: Ricoh Company, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Oblon, McClelland, Maier & Neustadt, L.L.P.
- 优先权: JP2014-040480 20140303; JP2014-143975 20140714; JP2015-018159 20150202
- 主分类号: G03G9/087
- IPC分类号: G03G9/087 ; G03G9/09
摘要:
A toner, including: base particles containing a polyester resin, a colorant, and a release agent, wherein the toner has a glass transition temperature (Tg1st) of 20° C. to 50° C. where the glass transition temperature (Tg1st) is measured in first heating of differential scanning calorimetry (DSC) of the toner, wherein tetrahydrofuran (THF) insoluble matter of the toner has a glass transition temperature [Tg2nd (THF insoluble matter)] of 30° C. or lower where the glass transition temperature [Tg2nd (THF insoluble to matter)] is measured in second heating of differential scanning calorimetry (DSC) of the THF insoluble matter, and wherein 50% or less of the colorant is present within a region of 1,000 nm from a surface of each of the base particles toward a center thereof.
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