Electrostatic charge image developing toner
AssigneeKonica Minolta, Inc.
InventorsKentarou MOGI, Ikuko SAKURADA, Ito KOGA
Life of this patent
Estimating the term…
Abstract
An electrostatic charge image developing toner of the present invention includes toner base particles including a binder resin and a wax, and an external additive adhered to a surface of the toner base particles. The binder resin includes a crystalline polyester resin and the amorphous resin. The external additive includes inorganic particles surface-treated with a surface treating agent. The inorganic particles have a hydrophobization degree of 80% or more. The HSP value (HSP1) of the wax and the HSP value (HSP2) of the surface treating agent satisfy the following expression (A): HSP1−HSP2≥2.7 . . . Expression (A).
Claims7
An electrostatic charge image developing toner, comprising:
- a toner base particle including a binder resin and a wax;
- and
- an external additive adhering to a surface of the toner base particle, wherein
- the binder resin includes a crystalline polyester resin and an amorphous resin,
- the external additive includes an inorganic particle surface-treated with a surface treating agent,
- a hydrophobization degree of the inorganic particle is 80% or more, and
- an HSP value (HSP1) of the wax and an HSP value (HSP2) of the surface treating agent satisfy expression (A) below:
- HSP
-
- 1
- -
- HSP
-
- 2
- ≥
- 2.7
- .
- Expression
-
- (
- A
- )
Dependencies are inferred from the claim text.