发明授权
US08053155B2 Toner, two-component developer, developing device, and image forming apparatus
有权
调色剂,双组分显影剂,显影装置和图像形成装置
- 专利标题: Toner, two-component developer, developing device, and image forming apparatus
- 专利标题(中): 调色剂,双组分显影剂,显影装置和图像形成装置
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申请号: US12170748申请日: 2008-07-10
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公开(公告)号: US08053155B2公开(公告)日: 2011-11-08
- 发明人: Satoru Ariyoshi , Kiyoshi Toizumi
- 申请人: Satoru Ariyoshi , Kiyoshi Toizumi
- 申请人地址: JP Osaka
- 专利权人: Sharp Kabushiki Kaisha
- 当前专利权人: Sharp Kabushiki Kaisha
- 当前专利权人地址: JP Osaka
- 代理机构: Nixon & Vanderhye P.C.
- 优先权: JPP2007-184798 20070713
- 主分类号: G03G9/00
- IPC分类号: G03G9/00
摘要:
A toner has columnar particles manufactured through: a kneading step of melt-kneading toner raw materials including at least binder resin, colorant and a release agent to prepare a kneaded product; a spinning step of extruding the kneaded product from orifices disposed at the tip of a spinning nozzle to prepare a fibrous kneaded product; and a pulverizing step of cutting or pulverizing the fibrous kneaded product, the toner matrix particles each having an aspect ratio of 0.5 to 5.0 and a dB/d50 value of 0.5 or above and contain an external additive composed of large particles and small particles having a volume average particle size smaller than that of the large particles, as well as to provide each of the columnar particles with each having 10 or less reentrants whose apertures have a longer length in a minor axis thereof than a radius of the respective large particles.
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