摘要:
A toner including toner particles comprising a binder resin; and at least two kinds of particulate resins which are located on at least a surface of the toner particles, wherein the toner satisfies at least one of the following relationships (TgA-TgB)≧20° C., wherein TgA and TgB represent glass transition temperatures (Tg) of a particulate resin (A) having a highest Tg and a particulate resin (B) having a lowest Tg among the at least two kinds of particulate resins, respectively; and 100,000≦Mwc≦6,000,000 and 8,000≦Mwd≦800,000, wherein Mwc and Mwd represent weight average molecular weights (Mw) of a particulate resin (C) having a highest Mw and a particulate resin (D) having a lowest Mw among the at least two kinds of particulate resins, respectively, wherein Mwc>Mwd.
摘要:
A toner containing a colorant, and a binder resin, wherein the toner is prepared by dissolving or dispersing a colorant, a precursor of the binder resin having a site capable of reacting with an active hydrogen group-containing compound, the active hydrogen group-containing compound, in an organic solvent, to prepare a toner constituent mixture liquid, dispersing or emulsifying the toner constituent mixture liquid, in an aqueous medium while subjecting the precursor to a reaction with the active hydrogen group-containing compound, to prepare a toner dispersion, and removing the organic solvent from the toner dispersion; the binder resin contains a modified polyester having an isocyanate-derived binding site; the Sn content in the toner is 800 ppm or less; the content of a metal which is non Sn and derived from a polyesterified catalyst is 10 ppm to 200 ppm; and the content of a metal which is non Sn and derived from an isocyanated catalyst is 10 ppm to 200 ppm.
摘要:
The object of the present invention is to provide a toner having a uniform composition of toner materials among toner particles, excelling in charge stability, enabling high-quality images without substantially causing fog and toner scattering, and having a small diameter and a narrow particle size distribution. The present invention also provides an effective production method of the toner, and an image forming method and the like using the toner. For this end, the present invention provides a method for producing a toner in which a dissolved and dispersed solution of toner materials is dispersed as dispersion particles in an aqueous medium containing no organic resin fine particles to prepare an oil droplet-in-water dispersion, and organic resin fine particles are added to the oil droplet-in-water dispersion to thereby granulate a toner in the presence of the organic resin fine particles.
摘要:
An object of the present invention is to provide a toner having small-sized and potato-shaped particles created from multiple coherent spherical particles for excellent cleaning ability and high image quality, an image-forming method that realizes high image quality using the toner, and the like. To this end, there is provided a toner, which is produced by granulating toner materials as an organic phase comprising at least a binder resin and a colorant in an aqueous medium and has potato-shaped particles created from multiple coherent primary oil droplets of the organic phase in the aqueous medium.
摘要:
A toner including a binder resin comprising a polyester resin in an amount of from 50 to 100% by weight, wherein the polyester resin includes an unsaturated polyester resin which is preferably a crystalline polyester resin; a colorant; and a fatty acid metal salt which is preferably microencapsulated. A method for preparing a toner including forming particles of a toner composition including at least a binder resin including a polyester resin in an amount of from 50 to 100% by weight and a colorant, in an aqueous medium to prepare a dispersion of a particulate material, wherein the polyester resin includes an unsaturated polyester resin; drying the particulate material; and mixing a fatty acid metal salt with the particulate material to subject double bonds of the unsaturated polyester resin to oxidation polymerization.
摘要:
A method of manufacturing toner including: preparing a first liquid by dissolving or dispersing toner components including a colorant, a release agent, and one or both of a binder resin and a precursor thereof in an organic solvent; preparing a second liquid having a viscosity of from 50 to 800 mPa·sec when measured with a Brookfield viscometer at a revolution of 60 rpm and a temperature of 25° C., by emulsifying the first liquid in an aqueous medium; and evaporating the organic solvent from the second liquid by flowing down the second liquid as a liquid film from a supply part along an inner wall surface of a pipe depressurized to 70 kPa or less in substantially a vertical direction, and heating the liquid film at not higher than a glass transition temperature of the binder resin by contact with the inner wall surface of the pipe in a heating part. A heat insulating part is provided between the supply part and the heating part.
摘要:
A toner including toner particles comprising a binder resin; and at least two kinds of particulate resins which are located on at least a surface of the toner particles, wherein the toner satisfies at least one of the following relationships (TgA−TgB)≧20° C., wherein TgA and TgB represent glass transition temperatures (Tg) of a particulate resin (A) having a highest Tg and a particulate resin (B) having a lowest Tg among the at least two kinds of particulate resins, respectively; and 100,000≦Mwc≦6,000,000 and 8,000≦Mwd≦800,000, wherein Mwc and Mwd represent weight average molecular weights (Mw) of a particulate resin (C) having a highest Mw and a particulate resin (D) having a lowest Mw among the at least two kinds of particulate resins, respectively, wherein Mwc>Mwd.
摘要:
A toner is provided including a binder resin including at least one polyester resin in an amount of from 50 to 100% by weight, and a colorant having a specific formula, wherein the toner has a shape factor SF-1 of from 120 to 150 and a shape factor SF-2 of from 125 to 180; and a developer using the toner.
摘要:
A toner is provided including a binder resin and a wax having primarily C—H and C—C bonds, and having a melting point of 50 to 90° C., wherein the wax is present in a surface portion of the toner in an amount of from 0.1 to 4.0% by weight, wherein the amount of the wax is determined by Fourier transform infrared spectroscopy attenuated total reflectance (FTIR-ATR); and the use of the toner in an image forming method, image forming apparatus, developer and toner cartridge containing the toner.