Toner and method of manufacturing the same
AssigneeSharp Kabushiki Kaisha
InventorsYoritaka Tsubaki, Yasuhiro Shibai
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Abstract
There is provided a toner which can be manufactured in a simple production method and which is excellent in preservation stability and anti-offset property with uniformly-charging performance. The toner is formed of aggregate of resin-containing particles which are obtained by forming amorphous resin particles into slurry and further finely granulating the amorphous resin particles in form of the slurry followed by aggregation of the amorphous resin particles and which contains a binder resin, a colorant, a release agent, and a release agent-dispersing aid, the resin-containing particles having a volume average particle diameter in a range of from 0.4 μm to 1.0 μm.
Claims8
A toner formed of aggregate of resin-containing particles which are obtained by finely granulating a slurry of amorphous resin particles containing a binder resin, a colorant, a release agent, and a release agent-dispersing aid using a high-pressure homogenizer method, the resin-containing particles having a volume average particle diameter in a range of from 0.4 μm to 1.0 μm,
- wherein the binder resin consists of a polyester resin, and
- the release agent-dispersing aid is selected from a styrene-ethylene-butadiene block copolymer, a styrene-methyl methacrylate block copolymer, an ethylene-styrene graft copolymer, maleic anhydride copolymer, and a copolymer of an α-olefin-maleic anhydride copolymer and maleic anhydride monoester.
A method of manufacturing a toner, comprising:
- a finely-granulating step of forming resin-containing particles having a volume average particle diameter in a range of from 0.4 μm to 1.0 μm by finely granulating amorphous resin particles containing a binder resin, a colorant, a release agent, and a release agent-dispersing aid;
- and
- an aggregating step of aggregating the resin-containing particles obtained at the finely-granulating step.
Dependencies are inferred from the claim text.