Patent classifications
G03G9/08764
ELECTROSTATIC IMAGE DEVELOPING TONER, ELECTROSTATIC LATENT IMAGE DEVELOPER, AND TONER CARTRIDGE
An electrostatic image developing toner includes a toner particle and an external additive. The toner particle contains a binder resin and a release agent that includes a hydrocarbon wax. The binder resin includes a vinyl resin and a hybrid resin in which an amorphous resin unit other than polyester resins and a crystalline polyester resin unit are chemically bound together. The toner particle has hybrid resin domains and release agent domains. An average distance Lhyb from the surface of the toner particle to the centers of the hybrid resin domains and an average distance Lwax from the surface of the toner particle to the centers of the release agent domains satisfy Lwax<Lhyb.
Toner, image forming apparatus, and image forming method
A toner includes a plurality of toner particles and a plurality of lubricant particles. The lubricant particles each include a core and a coat layer covering a surface of the core. The core contains stearic acid, palmitic acid, or a combination thereof. The coat layer has a thickness of at least 10 nm and no greater than 50 nm.
IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
An image forming apparatus including a developing device and a fixing device is provided. The fixing device includes a fixing rotator having a fixing surface, an opposing rotator opposing the fixing rotator to form a nip portion therebetween, and a fixing surface reformer having an abutting layer to abut the fixing surface. The abutting layer contains abrasive grains having an average grain size of 2.0-6.5 m on a surface which abuts the fixing surface. The toner comprises a crystalline polyester resin and exhibits G (storage elastic modulus) of 1.010.sup.7 Pa or lower at 70 C. in a temperature rising in a viscoelasticity measurement, G of 1.010.sup.7 Pa or higher at 70 C. in a temperature falling in the viscoelasticity measurement, and an endothermic peak indicating an amount of heat absorption of from 2.0 to 8.0 J/g, derived from the crystalline polyester resin, in a first temperature rising in DSC.
TONER, TONER SET, IMAGE TRANSFER SHEET, TONER ACCOMMODATING UNIT, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD
A toner has a softening point Ts of below 50 degrees C. and a tangent method glass transition temperature Tg2nd of below 0 degrees C.
WHITE TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT, ELECTROSTATIC IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD
A white toner for electrostatic latent image development includes toner particles containing a binder resin, a white pigment, and a release agent, the binder resin containing an amorphous resin. In viscosity measurement using a capillary viscometer, a temperature-viscosity curve has a minimum value within a temperature range of 70 C. or more and 95 C. or less.
TONER, TONER STORAGE UNIT, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD
A toner is provided. The toner comprises a colorant, a release agent, and a binder resin. The binder resin comprises a crystalline polyester resin and an amorphous polyester resin. The amorphous polyester resin comprises an amorphous polyester resin A and an amorphous polyester resin B. The amorphous polyester resin A comprises an isocyanurate backbone and at least one of urethane bond and urea bond. The amorphous polyester resin B comprises a trimellitic acid backbone and at least one of urethane bond and urea bond.
TONER, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD
A toner includes a plurality of toner particles and a plurality of lubricant particles. The lubricant particles each include a core and a coat layer covering a surface of the core. The core contains stearic acid, palmitic acid, or a combination thereof. The coat layer has a thickness of at least 10 nm and no greater than 50 nm.
IMAGE FORMING METHOD AND TONER SET FOR DEVELOPING ELECTROSTATIC LATENT IMAGE
An image forming method uses a color toner including a yellow toner, a magenta toner, a cyan toner, and a black toner. The image forming method includes a toner image forming step of forming a toner image by developing the color toner on an electrostatic latent image formed by charging and exposing a surface of an electrostatic latent image bearing member, a transfer step of transferring the toner image onto a recording medium to form a color toner image, and a fixing step of fixing the color toner image on the recording medium. Each toner contain at least a binder resin, a coloring agent, a release agent, and a layered silicate compound. The volume average particle diameter of each toner is 4 to 6 m. The content of the aluminum element in each toner represented by the Net intensity by WDXRF analysis has a specific relationship.
Toner, and external additive for toner
A toner comprising: a toner particle containing a binder resin and a colorant; and an external additive, wherein the external additive is a composite particle having an organic substance and an organosilicon polymer coating layer on the surface of the organic substance, and when a curve for the variation (dE/dT) in the storage elastic modulus E of the toner with respect to temperature T [ C.] is obtained on the basis of a curve of the temperature Tthe storage elastic modulus E [Pa] of the toner, as determined by powder dynamic viscoelasticity measurements of the toner, the relative minimum value on the lowest temperature side between the onset temperature and 90 C. is 1.3510.sup.8 or less.
MAGNETIC TONER AND IMAGE-FORMING METHOD
A magnetic toner is provided, which has a magnetic toner particle containing a binder resin, a wax, and a magnetic body, wherein, when Dn is a number-average particle diameter of the toner, CV1 is coefficient of variation of a brightness variance value of the toner in a particle diameter range of Dn0.500 to +0.500, and CV2 is coefficient of variation of a brightness variance value of the toner in a particle diameter range of Dn1.500 to 0.500, a relationship CV2/CV1 1.00 is satisfied; an average brightness of the toner in the range of Dn0.500 to +0.500 is 30.0 to 60.0; and when, in a cross section of the toner observed using a transmission electron microscope, which is divided with a square grid having a side of 0.8 m, coefficient of variation CV3 of an occupied area percentage for the magnetic body is 40.0 to 80.0%.