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Title:
TONER
Document Type and Number:
WIPO Patent Application WO/2019/027039
Kind Code:
A1
Abstract:
The present invention provides a toner that causes less splashing and has excellent transfer efficiency when forming a line image with lower transfer current. The toner comprises: toner particles containing a binding resin and a coloring agent; and an external additive. The toner is characterized in that: the external additive contains an external additive A having a Feret's diameter of 60 nm to 200 nm; the external additive A is made up of inorganic fine particles or organic-inorganic composite fine particles; the adherence index of the external additive A in the toner is 0.00 to 3.00; and when observing a cross-sectional post-processed image of the toner obtained by a transmission electron microscope (TEM), the following relational expressions (1) and (2) are satisfied: 60 ≤ b+c ≤ 200 (1) 0.15 ≤ b/(b+c) ≤ 0.30 (2) Where b (nm) represents the penetration depth of a part of the external additive A that penetrates inside the toner particle from the surface of the toner particle and c (nm) represents a projection height.

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Inventors:
URATANI KOZUE (JP)
YOSHIBA DAISUKE (JP)
TSUDA SHOHEI (JP)
NAGAOKA TOMOYA (JP)
YAMASHITA MARIKO (JP)
KANEKO KAZUKI (JP)
NAGATA RYO (JP)
Application Number:
PCT/JP2018/029215
Publication Date:
February 07, 2019
Filing Date:
August 03, 2018
Export Citation:
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Assignee:
CANON KK (JP)
International Classes:
G03G9/097
Foreign References:
JPH0481771A1992-03-16
JP2016038591A2016-03-22
JP2016126220A2016-07-11
JP2016139062A2016-08-04
JP2016139063A2016-08-04
JP2016142758A2016-08-08
JP2016142788A2016-08-08
JP2012063636A2012-03-29
JP2015125271A2015-07-06
JP2016142811A2016-08-08
JP2013109018A2013-06-06
JP2009109661A2009-05-21
JP2005270955A2005-10-06
Attorney, Agent or Firm:
NIWA, Takeshi et al. (JP)
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