Toner for developing electrostatic images
AssigneeKYOCERA Document Solutions Inc.
InventorToshiki Takemori
Life of this patent
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Abstract
A toner for developing electrostatic images contains a binder resin, a colorant, a release agent, and a charge control agent. The release agent contains a wax having a polar group. The toner for developing electrostatic images has tan δ of 1 to 2 at a temperature of 80° C. to 145° C. as measured with a viscoelasticity measuring apparatus at a frequency of 10 Hz and a shear stress of 500 Pa, and has a breaking point of 180° C. or less in a temperature-tan δ curve.
Claims6
A toner for developing electrostatic images, comprising:
- a binder resin, a colorant, a release agent, and a charge control agent;
- the release agent contains a wax having a polar group;
- and
- the toner for developing electrostatic images has tan δ of 1 to 2 at a temperature of 80 to 145° C. as measured with a viscoelasticity measuring apparatus at a frequency of 10 Hz and a shear stress of 500 Pa, and has a breaking point of 180° C. or less in a temperature-tan δ curve.
A method for forming images with an image-forming apparatus using a toner for developing electrostatic images comprising
- using as the image-forming apparatus an apparatus comprising:
- an image-forming section for transferring a toner image, a heating roller for heating a recorded medium to which the toner image has been transferred, and a pressure roller for pressing the recorded medium, the pressure roller being opposite the heating roller,
- using as the toner, toner comprising a binder resin, a colorant, a release agent, and a charge control agent, the release agent contains a wax having a polar group, and the toner has tan δ of 1 to 2 at a temperature of 80 to 145° C. as measured with a viscoelasticity measuring apparatus at a frequency of 10 Hz and a shear stress of 500 Pa, and has a breaking point of 180° C. or less in a temperature-tan δ curve;
- and
- forming images with the image forming apparatus.
Dependencies are inferred from the claim text.