Magnetic one-component toner and image forming apparatus using the same
AssigneeKYOCERA Document Solutions Inc.
InventorKento FURUTA
Life of this patent
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Abstract
Magnetic one-component toner includes a toner particle having a toner base particle and an external additive attached to the surface of the toner base particle. The toner base particle contains at least a binder resin and a magnetic powder. The external additive contains a wet silica particle and a conductive inorganic particle. The wet silica particle has its surface treated with a hydrophobization agent comprising a long-chain fatty acid ester with a carbon number of at least 18 or more. The conductive inorganic particle has a hydrophobized surface. The volume resistivity of the wet silica particle is 1.0E+7 [Ω·cm] or more but 1.0E+10 [Ω·cm] or less.
Claims5
Magnetic one-component toner comprising a toner particle having:
- a toner base particle containing at least a binder resin and a magnetic powder;
- and
- an external additive attached to a surface of the toner base particle,
- wherein
- the external additive contains:
- a wet silica particle with a surface thereof hydrophobized using a hydrophobization agent comprising a long-chain fatty acid ester with a carbon number of at least 18 or more;
- and
- a conductive inorganic particle with a hydrophobized surface, and
- a volume resistivity of the wet silica particle is 1.0E+7 [Ω·cm] or more but 1.0E+10 [Ω·cm] or less.
Dependencies are inferred from the claim text.