G03G2215/0604

WHITE TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT, ELECTROSTATIC IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, TONER SET FOR ELECTROSTATIC IMAGE DEVELOPMENT, AND ELECTROSTATIC IMAGE DEVELOPER SET

A white toner for electrostatic image development contains white toner particles that contain a binder resin and a white pigment and satisfy condition 1 below:

condition 1: a grain size distribution index GSD.sub.vL of the white toner particles satisfies formula (1) below, and a ratio of a number of white toner particles having a diameter of 3 μm or less to a total number of white toner particles is 1% by number or more and less than 6% by number:


1.2≤GSD.sub.vL(=D.sub.84v/D.sub.50v)≤1.5   formula (1):

(in formula (1), D.sub.84v is a particle diameter at which a cumulative frequency cumulated from a small diameter side in a volume-based particle size distribution is 84%, and D.sub.50v is a particle diameter at which the cumulative frequency cumulated from the small diameter side in the volume-based particle size distribution is 50%).

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.

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

An electrostatic charge image developing toner includes a carbodiimide compound and a polyester resin prepared by subjecting an alcohol component and a carboxylic acid component to condensation polymerization, wherein the alcohol component includes an aliphatic polyol in an amount of 60 mol % to 100 mol %.

White toner for electrostatic image development, electrostatic image developer, toner cartridge, process cartridge, image forming apparatus, image forming method, toner set for electrostatic image development, and electrostatic image developer set

A white toner for electrostatic image development contains white toner particles that contain a binder resin and a white pigment and satisfy condition 1 below: condition 1: a grain size distribution index GSD.sub.vL of the white toner particles satisfies formula (1) below, and a ratio of a number of white toner particles having a diameter of 3 μm or less to a total number of white toner particles is 1% by number or more and less than 6% by number:
1.2≤GSD.sub.vL(=D.sub.84v/D.sub.50v)≤1.5  formula (1):
(in formula (1), D.sub.84v is a particle diameter at which a cumulative frequency cumulated from a small diameter side in a volume-based particle size distribution is 84%, and D.sub.50v is a particle diameter at which the cumulative frequency cumulated from the small diameter side in the volume-based particle size distribution is 50%).

Electrophotographic image forming apparatus

An image forming apparatus includes an image holding member, a charging unit that charges a surface of the image holding member, an electrostatic charge image forming unit that forms an electrostatic charge image on the charged surface of the image holding member, a developing unit that includes an electrostatic charge image developing toner and that develops the electrostatic charge image on the surface of the image holding member with the electrostatic chare image developing toner to form a toner image, an intermediate transfer body that has a circumferential surface having a plurality of grooves and an average in-plane roughness ranging from 10 nm to 30 nm, a first transfer unit that first transfers the toner image formed on the surface of the image holding member to a surface of the intermediate transfer body, and a second transfer unit that second transfers the toner image transferred to the surface of the intermediate transfer body to a recording medium, wherein the electrostatic charge image developing toner satisfies the following formulae
(ln (T1)ln (T2))/(T1T2)0.14,
(ln (T2)ln (T3))/(T2T3)0.15, and
(ln (T1)ln (T2))/(T1T2)<(ln (T2)ln (T3))/(T2T3),
wherein (T1) represents a viscosity of the electrostatic charge image developing toner at 60 C., (T2) represents a viscosity of the electrostatic charge image developing toner at 90 C., and (T3) represents a viscosity of the electrostatic charge image developing toner at 130 C.

Powder storage container and image forming apparatus

A powder storage container is provided. The powder storage container includes a container body, a discharge port, a conveyer, a stirrer, a return port, and a partition wall. The container body is configured to contain powder. The powder contained in the container body is dischargeable through the discharge port. The conveyer is configured to convey the powder to the discharge port. The stirrer is configured to stir the powder contained in the container body by rotating. The return port is disposed outside a rotational locus of the stirrer in a radial direction, and the powder conveyed by the conveyer is returnable through the return port toward the stirrer. The partition wall is disposed between the stirrer and the return port with at least a part of the partition wall positioned above the return port.

Toner, developer, process cartridge, image forming apparatus, image forming method, and method for manufacturing toner

A toner is provided. The toner comprises a glittering pigment and a coloring pigment. The glittering pigment is disposed inside the toner. The coloring pigment comprises a yellow pigment comprising an isoindoline pigment.

RESIN PARTICLES, TONER, METHOD FOR PRODUCING RESIN PARTICLES, METHOD FOR PRODUCING TONER, DEVELOPER, TONER STORAGE UNIT, AND IMAGE FORMING APPARATUS

Resin particles each include a crystalline polyester resin, an amorphous polyester resin, a release agent, and a colorant. The crystalline polyester resin includes an acid component and an alcohol component as constitutional units, and the acid component of the crystalline polyester resin includes plant-derived dicarboxylic acid having 12 or less carbon atoms. The crystalline polyester resin is present as domains in a matrix of the amorphous polyester resin within each resin particle, an average major axis of the domains of the crystalline polyester resin is 2.0 micrometers or less, and an average aspect ratio (major axis/minor axis) of the domains is 4.0 or greater. The resin particles have a carbon radioisotope .sup.14C concentration of 5.4 pMC or greater.

Curable toner compositions and processes

An emulsion aggregation toner composition includes toner particles including: an unsaturated polymeric resin, such as amorphous resins, crystalline resins, and combinations thereof; an optional colorant; an optional wax; an optional coagulant; and a photoinitiator. By optimizing the particle size of the emulsion, the aggregant concentration utilized in the emulsion aggregation process, and the solids content of the emulsion, toners may be produced capable of generating images with non-contact fusing that have high gloss.

TONER, DEVELOPING AGENT, TONER ACCOMMODATING UNIT, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD

A toner contains a mother toner particle containing a resin, a colorant, and a wax and an inorganic external additive on the surface of the mother toner particle, wherein the following relationships are satisfied:

[00001] 20 < A ? 4 0 Relationship 1 0 ? B - A ? 10 , Relationship 2 2.3 < C < 5. Relationship 3 where A (percent by mass) represents the liberation ratio of the inorganic external additive separated by shaking the toner with ultrasonic wave at a power of 20 W and a frequency of 20 kHz for one minute, B (percent by mass) represents the liberation ratio of the inorganic external additive separated by shaking the toner with ultrasonic wave at a power of 60 W and a frequency of 20 kHz for one minute, and C (percent by mass) represents the proportion of the inorganic external additive to the toner.