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US 10,884,350 B2Granted
Toner, toner accommodating unit, and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsToma Takebayashi, Taichi Nemoto
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Abstract
A toner is provided. The toner comprises a binder resin, a colorant, and a release agent. The binder resin comprises a polyester resin comprising a crystalline polyester resin. The crystalline polyester resin forms domains having a number average long diameter of from 0 to 50 nm in a cross-section of the toner. The toner satisfies the following relation: G′(50)/G′(90)≥6.0×102 where G′(50) and G′(90) represent storage elastic modulus of the toner at 50 degrees C. and 90 degrees C., respectively.
Claims17
A toner comprising:
- a binder resin comprising a polyester resin comprising a crystalline polyester resin;
- a colorant;
- and
- a release agent,
- wherein the crystalline polyester resin forms domains having a number average long diameter of from 0 to 50 nm in a cross-section of the toner,
- wherein the toner satisfies the following relation:
- 9.0×102≥G′(50)/G′(90)≥6.0×102
- where G′(50) and G′(90) represent storage elastic modulus of the toner at 50 degrees C. and 90 degrees C., respectively,
- wherein the binder resin further comprises a styrene acrylic resin, and a proportion of the styrene acrylic resin in the binder resin is less than 10% by mass.
6 more elements
A toner comprising:
- a binder resin comprising a polyester resin comprising a crystalline polyester resin;
- a colorant;
- and
- a release agent,
- wherein the crystalline polyester resin forms domains having a number average long diameter of from 0 to 50 nm in a cross-section of the toner,
- wherein the toner satisfies the following relation:
- 9.0×102≥G′(50)/G′(90)≥6.0×102
- where G′(50) and G′(90) represent storage elastic modulus of the toner at 50 degrees C. and 90 degrees C., respectively,
- wherein the toner exhibits an endothermic peak indicating an amount of heat absorption of 3 J/g or more in a first temperature rising of differential scanning calorimetry, the endothermic peak derived from the crystalline polyester resin.
6 more elements
Dependencies are inferred from the claim text.