Patent application number | Description | Published |
20090011347 | ELECTROPHOTOGRAPHIC TONER, ELECTROPHOTOGRAPHIC DEVELOPER, TONER CARTRIDGE, AND IMAGE FORMING METHOD - The invention provides an electrophotographic toner having a crystalline polyester resin; a non-crystalline polyester resin; a colorant; and a releasing agent. A resin (i), that is included in a toluene-soluble component of the toner and having a molecular weight of 30,000 to 100,000 as measured by gel permeation chromatography relative to polystyrene standards, has an acid value A. A resin (ii), that is included in a toluene-soluble component of the toner and having a molecular weight of 8,000 to 12,000 as measured by gel permeation chromatography relative to polystyrene standards, has an acid value B. A resin (iii), that is included in a toluene-insoluble component of the toner, has an acid value C. The acid values A, B, and C satisfy the inequation of B>A>C. The invention further provides an electrophotographic developer using the toner, a toner cartridge storing the toner, and an image forming method using the developer. | 01-08-2009 |
20090155707 | TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT AND MANUFACTURING METHOD THEREOF, AND ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - There is provided a toner for electrostatic charge image development, which includes a binder resin that includes a non-crystalline polyester resin and a crystalline polyester resin, and a colorant, wherein in a measurement of an acetone-soluble fraction of the toner by gel permeation chromatography, in which W1 represents the total area of an elution curve of the acetone-soluble fraction, F(0-10) represents an eluate corresponding to from the beginning of the elution to 10% elution of W1 over time, and F (80-100) represents an eluate corresponding to from 80% elution to 100% elution of W1 over time, the amount of an aliphatic unsaturated dicarboxylic acid-derived component of the resins contained in the eluate F(0-10) is in the range of from about 0 mol % to about 10 mol % relative to the total amount of the acid-derived components of the resins contained in the eluate F(0-10), and the amount of the aliphatic unsaturated dicarboxylic acid-derived component of the resins contained in the eluate F(80-100) is in the range of from about 20 mol % to about 60 mol % relative to the total amount of the acid-derived components of the resins contained in the eluate F(80-100). | 06-18-2009 |
20090245858 | ELECTROSTATIC CHARGE DEVELOPER, ELECTROSTATIC CHARGE IMAGE DEVELOPER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - 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. | 10-01-2009 |
20100080609 | IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - The invention provides an image forming apparatus, comprising: an electrophotographic photoreceptor, a charging unit, an exposure unit, a developing unit, a transfer unit, a fixing unit, and a cleaning unit; the electrophotographic photoreceptor having an outermost layer containing a charge transporting material and at least one curable resin selected from the group consisting of a phenol resin, an epoxy resin and a melamine resin, and the toner having an ammonium ion concentration as determined by ion chromatography of from about 50 ppm to about 300 ppm. | 04-01-2010 |
20100099038 | ELECTROSTATIC IMAGE DEVELOPING TONER, ELECTROSTATIC IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS - An electrostatic image developing toner includes a binder resin; and a pigment having a complementary relationship with a color hue of the binder resin, the pigment being contained in an amount of about 1 ppm or greater but not greater than about 20 ppm. | 04-22-2010 |
20100104967 | ELECTROSTATIC-IMAGE-DEVELOPING TONER AND PREPARATION PROCESS THEREOF, ELECTROSTATIC IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS - An electrostatic-image-developing toner includes: a binder resin; and a yellow pigment in an amount of from about 5 to about 50 ppm. | 04-29-2010 |
20100183966 | TONER SET FOR ELECTROSTATIC IMAGE DEVELOPMENT, IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS - A toner set for electrostatic image development, includes: at least one kind of a colored toner that contains a coloring agent; and a transparent toner that does not substantially contain a coloring agent, wherein a proportion of particles having a shape factor of 0.94 or less in mother particles of the transparent toner is about 5% by number or less based on particles having a particle diameter of 7.5 to 15 μm, and a reflectance of the mother particles of the transparent toner is about 90% or more for light at a wavelength of 700 nm. | 07-22-2010 |
20110020746 | ELECTROSTATIC IMAGE DEVELOPER, DEVELOPER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An electrostatic image developer is provided, the electrostatic image developer including: a carrier for an electrostatic image developer, the carrier including a core particle which has a plurality of projections on a surface of the core particle; and electrostatic image developing toners, wherein the electrostatic image developer satisfies following relationships of formulae (1) and (2): | 01-27-2011 |
20120015291 | ELECTROSTATIC IMAGE DEVELOPING CARRIER, ELECTROSTATIC IMAGE DEVELOPER, IMAGE-FORMING METHOD, DEVELOPER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - An electrostatic image developing carrier includes a core particle and a coating layer on the core particle. The coating layer contains a resin having a crosslinked structure formed by using at least one compound selected from boric acid and boric acid derivatives. | 01-19-2012 |
20120040284 | ELECTROSTATIC IMAGE-DEVELOPING TONER, ELECTROSTATIC IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - An electrostatic image developing toner that includes a toner particle including a binder resin containing a resin selected from an acrylic resin, a styrene-acrylic resin, and a styrene-(meth)acrylic acid ester copolymer. The resin has a crosslinked structure formed by using at least one of boric acid and boric acid derivatives. | 02-16-2012 |
20120264041 | POLYESTER RESIN FOR TONER, TONER, DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A polyester resin for a toner containing: a repeating unit derived from a dicarboxylic acid component; and a repeating unit derived from a diol component represented by Formula (1): | 10-18-2012 |
20130022905 | ELECTROSTATIC IMAGE DEVELOPING TONER, ELECTROSTATIC IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An electrostatic image developing toner includes (A) an amorphous polyester resin containing at least a repeating unit derived from a dicarboxylic acid component and a repeating unit derived from a dialcohol component represented by the specific formula, and (B) an amorphous polyester resin differing in the weight average molecular weight from the amorphous polyester resin (A), wherein the difference (absolute value) in the weight average molecular weight between the amorphous polyester resin (A) and the amorphous polyester resin (B) is from about 30,000 to about 100,000. | 01-24-2013 |
20130022906 | POLYESTER RESIN FOR TONER, TONER, DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A polyester resin for a toner including: a repeating unit derived from a dicarboxylic acid component; and a repeating unit derived from a diol component represented by Formula 1: | 01-24-2013 |
20130022908 | POLYESTER RESIN FOR TONER, ELECTROSTATIC-IMAGE-DEVELOPING TONER, ELECTROSTATIC IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - There is provided a polyester resin for a toner, including: a polycondensate of a polyvalent carboxylic acid component and a polyhydric alcoholic component, wherein the polyhydric alcoholic component contains a rosin diol represented by the following Formula (1) and a content of the rosin diol is 80 mole % to 100 mole % based on the total polyhydric alcoholic component. | 01-24-2013 |
20130029264 | ELECTROSTATIC IMAGE DEVELOPING TONER, ELECTROSTATIC DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - An electrostatic image developing toner contains toner particles containing a polyester resin having a repeating unit deriving from a dicarboxylic acid and a repeating unit deriving from a rosin diol, and an external additive containing silica particles, wherein a weight average molecular weight (Mw) of the soluble matter in tetrahydrofuran of the toner is from about 60,000 to about 200,000. | 01-31-2013 |
20130084520 | ELECTROSTATIC IMAGE DEVELOPING TONER AND MANUFACTURING METHOD OF THE SAME, ELECTROSTATIC IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - An electrostatic image developing toner of the exemplary embodiment of the invention contains an amorphous first polyester resin of a polycondensation product of at least a carboxylic acid component and an alcohol component containing rosin, and a second polyester resin having the difference (absolute value) in parameter of solubility relative to the first polyester resin of from about 0.3 (cal/cm | 04-04-2013 |
20130164672 | POLYESTER RESIN, ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - A polyester resin is a polycondensate obtained by reacting a divalent alcohol, a divalent carboxylic acid, and a mono- or divalent rosin by the use of a zinc compound as a reaction catalyst. | 06-27-2013 |
20130188986 | POLYESTER RESIN FOR TONER, TONER, DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A polyester resin for a toner containing: a repeating unit derived from a dicarboxylic acid component; and a repeating unit derived from a dial component represented by Formula (1): | 07-25-2013 |