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US 8,911,923 B2Granted
Toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, developer cartridge, process cartridge, image forming apparatus, and image forming method
AssigneeFuji Xerox Co., Ltd.
InventorsYoshifumi Iida, Eiji Kawakami, Shintaro Anno, Masahiro Takagi
Life of this patent
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Abstract
The toner for developing an electrostatic charge image includes toner particles containing a colorant, a binder resin, and a release agent, and an external additive, wherein the external additive contains inorganic particles having fluorine atom-containing oil on the hydrophobization-treated surfaces.
Claims12
A toner for developing an electrostatic charge image comprising:
- toner particles containing a colorant, a binder resin, and a release agent;
- and
- an external additive that contains inorganic particles having hydrophobization-treated surfaces and a fluorine atom-containing oil on the hydrophobization-treated surfaces,
- wherein
- an amount of the fluorine atom-containing oil is from 7% to 30% by weight with respect to a total weight of the external additive,
- a weight ratio of the hydrophobization treatment agent to the fluorine atom-containing oil is in a range of 1:30 to 50:1,
- the inorganic particles are treated with the fluorine atom-containing oil prior to incorporation of the external additive into the toner, and
- the fluorine atom-containing oil is selected from perfluoropolyether, polyhexafluoropropylene epoxide, polychlorotrifluoroethylene, polytetrafluoroethylene, and perfluorocarbon.
5 more elements
Dependencies are inferred from the claim text.