Abstract: Provided are hollow particles which are more excellent in heat resistance and dispersibility than ever before and which are lightweight. The hollow particles containing hollow resin particles having a surface covered with inorganic fine particles, wherein a volume average particle diameter of the hollow particles is from 0.1 ?m to 9.0 ?m, and a void ratio thereof is from 55% to 95%; wherein a repeating unit constituting the resin of the hollow resin particles contains a crosslinkable monomer unit, and a content of the crosslinkable monomer unit is from 25 to 100 parts by mass, with respect to 100 parts by mass of the resin; wherein a primary particle diameter of the inorganic fine particles is from 10 nm to 120 nm; and wherein the inorganic fine particles are contained at from 5 to 180 parts by mass, with respect to 100 parts by mass of the hollow resin particles.

Abstract: An image forming apparatus and an image forming method are provided that realize both the use of a decolorizing toner and a non-decolorizing toner and miniaturization of the apparatus.

Abstract: Developer includes toner formed of base particles containing at least a binder resin. The base particles have surfaces coated with an additive agent, and the toner has a volume average particle size between 3.9 ?m and 6.1 ?m. The developer further includes agglomerates in an amount between 0.01 wt % and 0.10 wt %. The agglomerates have a volume average particle size between 75 ?m and 100 ?m.

Abstract: An electrostatic charge developer includes a carrier having a core material and a resin coating layer covering the surface of the core material, and a toner having a binder resin that contains a non-crystalline polyester resin and a crystalline polyester resin. The resin coating layer contains a copolymer that contains a nitrogen-containing acrylic ester or nitrogen-containing methacrylic ester and an alicyclic acrylic ester or alicyclic methacrylic ester. The non-crystalline polyester resin contains at least an alkyl succinic acid or an anhydride or lower alkyl ester thereof, or an alkenyl succinic acid or an anhydride or lower alkyl ester thereof. The crystalline polyester resin is an aliphatic polyester resin.

Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. More particularly, the embodiments pertain to an improved electrostatographic imaging member incorporating a carbon nano tube dispersion into a high molecular weight polycarbonate and an anti-static copolymer with polyester, polycarbonate, and polyethylene glycol units in a formulation for the anti-curl back coating layer which provides a conductively suitable and stable dispersion coating solution for making an optically suitable anti-curl back coating layer.

Abstract: A method for the preparation of shaped polymeric particles, and in a particular embodiment shaped electrostatographic toner particles, of controlled morphology including the following steps. A selected solvent or solvent mixture is used to dissolve a polyester polymer material to form an organic phase, wherein the polyester material is formed from at least one diol and at least one multicarboxylic aromatic acid and has a solubility parameter of greater than 9.0 (cal/cm3)1/2, the selected solvent or solvent mixture includes at least a first solvent having a solubility parameter of less than 9.0 (cal/cm3)1/2, and the difference in solubility parameters for the polyester material and the at least first solvent is between 1.0 and 3.0 (cal/cm3)1/2. The organic phase is dispersed in an aqueous phase containing a particulate stabilizer to form a dispersion, which is then homogenized.

Abstract: Toner particles are provided which may, in embodiments, include a high molecular weight branched or cross-linked polyester to decrease image gloss and to increase toner elasticity to prevent surface additives impaction. In embodiments, the toner particles may have a core-shell configuration, with the high molecular weight polyester in the core, the shell, or both.

Abstract: Exemplary embodiments provide charge generating layers and electrographic imaging members containing the charge generating layers. In various embodiments, an imaging member can be a multilayered photoconductive imaging member with a charge generating layer including, for example, a photogenerating pigment, such as a metal phthalocyanine; a dopant material, such as a multiple halide compound dopant and/or an ether dopant; and a binder or polymer. The imaging members can exhibit high photosensitivity, low residual potential (Verase), and excellent cyclic/environmental stability and can be used as photoreceptors, photosensitive members, and the like, in a machine of copy, printer, fax, scan, multifunction machines, and the like.

Abstract: Embodiments include a toner having a) a polyester resin derived from a naphthalenic material, a 2-alkyl succinic material, and 2,2-ethyl-butyl-1,3-propanediol, b) a wax, and c) an optional colorant.

Abstract: Toner and a developer which are excellent in cleaning property and fixing property at low temperature, and capable of forming images with high quality are provided, along with a method for their production. A toner producing method involves dispersing and/or emulsifying an oil phase or a monomer phase containing a toner composition and/or a toner composition precursor in a water-based medium to granulate, wherein the toner has an average circularity of 0.925 to 0.970, and the toner composition and/or the toner composition precursor has a layered inorganic material in which at least a part of interlayer ions in the layered inorganic material has been exchanged with organic ions.

Abstract: A process for making a resin emulsion suitable for use in forming toner particles is provided. In embodiments, a suitable process includes melt mixing a resin in the absence of an organic solvent, optionally adding a surfactant to the resin, adding to the resin a basic agent and water, and subjecting the resin, basic agent and water to acoustic mixing at a suitable frequency to form an emulsion of resin particles. In embodiments, the resin emulsion thus produced may be utilized to form a toner.

Abstract: In accordance with various embodiments, there is a method of making a polyester. The method can include providing a monomer solution, the monomer solution including one or more cyclic esters in a concentration ranging from about 1 to about 100% and one or more solvents in a concentration ranging from about 99% to about 0%. The method of making a polyester can also include providing a packed-bed reactor including one or more immobilized enzymes, wherein the packed-bed reactor has an inlet and an outlet. The method can further include circulating the monomer solution through the packed-bed reactor to generate a solution enriched with polyester, such that the one or more immobilized enzymes convert the one or more cyclic esters to polyester in the packed-bed reactor during circulation and collecting the solution enriched with polyester exiting through the outlet.

Abstract: To provide a wet developer which is capable of improving fixability, while ensuring a sufficient heat-resistant storage property. The wet developer contains toner particles composed of a colorant and a binder resin, which are dispersed in a non-volatile carrier solution by using a dispersant. As the binder resin, a polyester resin, which has an alcohol component containing a mixture of an ethylene oxide adduct of bisphenol A and a propylene oxide adduct of bisphenol A, with a ratio thereof being 1:19 to 10:10 (weight ratio), is used.

Abstract: The present teaching provides a method for producing a positive charging toner that can exhibit stable charge characteristics. According to the present teaching, a positive charging toner is produced by preparing a base particle suspension having a conductivity not higher than 70 ?S/cm and comprising base particles that are obtained by mixing and emulsifying an aqueous medium and a resin solution containing the polyester resin; producing toner base particles by mixing the base particle suspension with a charge control resin microparticle suspension containing charge control resin microparticles; causing the charge control resin microparticles to adhere to the surfaces of the base particles; and washing the toner base particles.

Abstract: Provided is a toner production method that reuses a fine particle toner having a particle diameter failing to meet a predetermined standard diameter which is generated in pulverizing and classifying processes carried out for a toner material including at least a binder resin, release agent and pigment. The method includes granulating the fine particle toner by means of a granulating apparatus so as to increase a loose apparent density of the fine particle toner from the range of 0.05 g/cc to 0.25 g/cc to the range of 0.30 g/cc to 0.60 g/cc, in which wherein the granulating apparatus contains two left and right press rolls having the same diameters, the two press rolls having a rotational speed ratio of 0.40 to 0.95.

Abstract: An electrophotographic photoreceptor including a conductive substrate; and a photosensitive layer located overlying the conductive substrate, including a charge generation material, an electron transport material having a specific formula, and a hole transport material having a specific formula.

Abstract: The invention pertains to a method for obtaining para-type wholly aromatic polyamide particles, comprising the steps: a) introducing an aramid polymer solution into a water-based coagulating liquid to obtain a hydrous shaped product; and b) subjecting the never-dried or partly-dried shaped product having a water content of 10 to 99% by weight to freeze-grinding. These aramid polymer particles can be used as a filler material.

Abstract: The present disclosure provides polymer-ionic complexes useful as charge control agents. Such charge control agents may be utilized with toner particles to impart excellent triboelectric charging characteristics to the toner.

Abstract: The toner includes a plurality of toner particles containing a binder resin and a colorant. In toner particles, according to measurement by a flow particle image analyzer, the content of small size particles having a circle-equivalent diameter of 0.5 to 2.0 ?m is 5% by number or less based on the entire toner particles, the content of medium size particles having a circle-equivalent diameter of more than 2.0 ?m and 4.0 ?m or less is 20% by number or more and 30% by number or less based on the entire toner particles, and the content of large size particles having a circle-equivalent diameter of more than 4.0 ?m and 6.0 ?m or less is 50% by number or more and 70% by number or less based on the entire toner particles, and the shape factor of the toner particles SF1 is 130 or more and 140 or less.

Abstract: The present disclosure provides processes for producing images of excellent color fidelity when incorporating a magenta toner with a lower colorant loading in addition to a first magenta toner. In embodiments, the magenta pigmented particles may be magenta emulsion aggregation toners. In accordance with the present disclosure, a pair of magenta toners are matched in color, wherein the color of a first magenta toner printed at a predetermined halftone area coverage on a substrate substantially matches the color of the solid (100%) printed patch of the second magenta toner, which is lighter than the first magenta toner, thus avoiding a visible hue shift on the print that would otherwise be objectionable.