Toner
AssigneeCanon Kabushiki Kaisha
InventorsMasatake Tanaka, Shintaro Kawaguchi, Taiji Katsura, Dai Nozaki
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Abstract
A toner comprising: a toner particle comprising a binder resin; and an external additive at the surface of the toner particle, wherein, in a wettability test of the toner in a mixed methanol/water solvent, the methanol concentration at which the transmittance of light having a wavelength of 780 nm is 50% is 5 to 35 vol %, the external additive comprises a fluorine-containing particle, and the fluorine-containing particle is at least one selected from the group consisting of a fluorine-containing titania particle, a fluorine-containing silica particle, a fluorine-containing alumina particle, a fluorine-containing titanium composite oxide particle and a fluorine-containing hydrotalcite particle.
Claims7
A toner, comprising:
- a toner particle comprising a binder resin;
- and
- an external additive at the surface of the toner particle, the external additive comprising a fluorine-containing hydrotalcite particle, wherein
- the methanol concentration at which the transmittance of light having a wavelength of 780 nm is 50% in a wettability test of the toner in a mixed methanol/water solvent is 5 to 35 vol %,
- fluorine and aluminum are present in an inner part of the fluorine-containing hydrotalcite particle in line analysis in STEM-EDS mapping analysis of the toner,
- a concentration ratio of the number of fluorine atoms relative to aluminum atoms (F/Al) in the fluorine-containing hydrotalcite particle is 0.02 to 0.60 as determined by primary component mapping of the fluorine-containing hydrotalcite particle in STEM-EDS mapping analysis of the toner, and
- a fixing ratio of the fluorine-containing particle to the toner particle is 40 to 95%.
Dependencies are inferred from the claim text.