G03G9/09

TONER

A toner comprises toner particles, each of which contains a binder resin, a colorant, a wax and a crystalline polyester. The melting point P(t) of the crystalline polyester is at least 65.0° C. and not more than 80.0° C., and regarding a storage elastic modulus G′ obtained in dynamic viscoelasticity measurement of the toner, where G′ at 50° C. is denoted by G′(50), G′ at 80° C. is denoted by G′(80), G′ at 120° C. is denoted by G′(120), and G′ at the melting point P(t) of the crystalline polyester is denoted by G′(t), the following formulas are satisfied: 4.2×10.sup.8 Pa≦G′(50), 3.0×10.sup.2≦G′(50)/G′(80), and G′(t)/G′(120)≦7.0×10.sup.2.

TONER

A toner having a toner particle containing a binder resin and a crystalline material, wherein when “a” is an endothermic quantity deriving from the crystalline material in a DSC of the toner and “b” is an endothermic quantity deriving from the crystalline material in a DSC of the toner that has been held for 10 hours in an environment with a temperature of 55° C. and a humidity of 8% RH, the “a” and “b” satisfy a relationship a/b≧0.85; in a dynamic viscoelastic measurement of a non-melt-molded pellet of the toner, the toner has a temperature range A for which G″≦1×10.sup.5 Pa and tan δ<1 are satisfied; and in a dynamic viscoelastic measurement of a melt-molded pellet of the toner, the toner has a temperature range B for which tan δ>1 is satisfied within the temperature range A.

Toner container, image forming unit, and image forming apparatus

A toner container used in an image forming apparatus including an exposure unit with a light emitting diode light source. The toner container including a container body, and a cyan toner stored in the container body. The cyan toner includes a binder resin, at least one pigment, a charge control agent, and an external additive. The at least one pigment includes at least Pigment Blue. A lightness L*, a hue a*, and a hue b* of the cyan toner in a powder state satisfy: 30.04≤L*≤33.68, −1.75≤a*≤0.71, and −47.47≤b*≤−45.08.

TONER
20170293235 · 2017-10-12 ·

Provided is a toner having a toner particle containing a binder resin and a wax, wherein the wax concentrations near the outermost surface of the toner and in the surface layer region below the outermost surface are controlled, so that the wax moves with high efficiency to near the outermost surface during heating.

Toner set for electrostatic image development, developer set for electrostatic image development, process cartridge set, image forming apparatus, and image forming method
09785076 · 2017-10-10 · ·

A toner set for electrostatic image development includes a cyan toner, a magenta toner, and a yellow toner, wherein the Vicat softening temperatures of the toners are respectively in the range of from about 30° C. to about 60° C., and among the toners, the difference between the Vicat softening temperature of the toner having the highest Vicat softening temperature and the Vicat softening temperature of the toner having the lowest Vicat softening temperature is from about 1° C. to about 5° C.

Toner set for electrostatic image development, developer set for electrostatic image development, process cartridge set, image forming apparatus, and image forming method
09785076 · 2017-10-10 · ·

A toner set for electrostatic image development includes a cyan toner, a magenta toner, and a yellow toner, wherein the Vicat softening temperatures of the toners are respectively in the range of from about 30° C. to about 60° C., and among the toners, the difference between the Vicat softening temperature of the toner having the highest Vicat softening temperature and the Vicat softening temperature of the toner having the lowest Vicat softening temperature is from about 1° C. to about 5° C.

Toner including microcapsules that contain a fragrant material

A toner includes a plurality of toner particles containing a binder resin and one or more microcapsules that contain a fragrant material. A ratio of a number of toner particles that contain at least one microcapsule in a region from a surface thereof to 1 μm in depth with respect to a total number of toner particles in the region is equal to or greater than 60%.

IMAGE FORMING METHOD
20170285503 · 2017-10-05 ·

A high quality image excellent in low-temperature fixability and good in color stability can be formed by an image forming method of the present invention. In the image forming method, an image is formed by an electrophotographic method using toners of plural colors. Each of the toners of the plural colors contains a crystalline resin, methanol concentrations (%) at transmittance of 50% obtained for methanol wettability evaluation of the toners of the plural colors all fall in a range of 15 to 60%, and assuming that a maximum value and a minimum value of the methanol concentrations (%) at transmittance of 50% obtained for the methanol wettability evaluation of the toners of the plural colors are respectively WH(%) and WL(%), a relationship of 4≦WH−WL≦30 is satisfied.

TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT AND IMAGE FORMING METHOD
20170285502 · 2017-10-05 ·

The present invention relates to a toner for electrostatic charge image development, including: a toner base particle having at least a binder resin, a releasing agent, and a colorant, wherein the following formula (1) is satisfied wherein a maximum value and a minimum value of a dielectric loss tangent tan δ, which are obtained by measuring at a frequency in the range of 1 kHz to 100 kHz under the condition at a temperature of 20° C. and a relative humidity of 50% RH, are defined as tan δ.sub.max and tan δ.sub.min, respectively. According to the present invention, a toner for electrostatic charge image development, with which the rising of the toner charge amount is improved while ensuring the low temperature fixability, and a high quality image having less density unevenness can be obtained even during the image forming at a high speed and a high printing rate, is provided.


Frequency showing tan δ.sub.max<Frequency showing tan δ.sub.min  (1)

ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER SET, ELECTROSTATIC CHARGE IMAGE DEVELOPER SET, AND TONER CARTRIDGE SET

An electrostatic charge image developing toner set includes a brilliant toner including toner particles that include a brilliant pigment and a first binder resin, a black toner including toner particles that include a second binder resin, and a color toner except a black toner, including toner particles that include a third binder resin, wherein the brilliant toner, the black toner and the color toner satisfy Expression (1): Dielectric loss factor of the brilliant Toner>Dielectric loss factor of the black toner>Dielectric loss factor of the color toner and Expression (2): 25×10.sup.−3≦(Dielectric loss factor of the brilliant toner)−(Dielectric loss factor of the color toner)≦95×10.sup.−3.