Abstract: Toner containing toner particles having a resin component, in which the resin component has an olefin-based copolymer and a crystalline polyester resin, the olefin-based copolymer has a unit Y1 represented by Formula (1) and at least one kind of unit Y2 selected from the group consisting of a unit represented by Formula (2) and a unit represented by Formula (3), a content of the olefin-based copolymer contained in the resin component is 50% by mass or more based on a total mass of the resin component, a content of the unit Y2 is 3% by mass or more and 35% by mass or less based on a total mass of the olefin-based copolymer, and a melt flow rate of the olefin-based copolymer is 30 g/10 min or less.

Abstract: An object of the present invention is to provide a toner that produces an excellent bending resistance in the output image and that also exhibits an excellent low-temperature fixability and an excellent storage stability. This toner includes a binder resin and a thermoplastic elastomer having a crystalline part, wherein the binder resin and the thermoplastic elastomer in the toner are compatible with each other and the toner has a crystalline part originating from the thermoplastic elastomer.

Abstract: The present invention provides a crystalline polyester resin which has sharp melt property, can achieve both fixing performance and blocking property and has excellent development durability, in which the crystalline polyester resin for toner which has a Young's modulus as measured by an ultramicro durometer at 25° C. of at least 2 GPa and a melting point of at least 60° C. and not more than 125° C.

Abstract: An image forming apparatus is configured to form a toner image by a toner image forming portion on an intermediate transfer belt, to transfer the toner image to a transfer and fixing belt, and to form a toner film by heating and pressurizing the toner image on the transfer and fixing belt. The transfer and fixing belt includes an elastic layer and when the toner film is pressurized to a recording medium in a body at a toner film transfer portion, the toner film is pressed to the recording medium while following surficial ruggedness of the recording medium. Because the toner image is formed by using toner particles containing a thermoplastic elastomer having crystallinity, the toner film formed of this toner image is fully resilient.

Abstract: The present invention provides a crystalline polyester resin having a sharp melt property that realizes both fixing performance and blocking property and demonstrates favorable charging performance, in which the crystalline polyester resin for toner, satisfying the following relationships, 25?Tg?70, and (Tg+273)/(Mp+273)?0.75, wherein Tg (° C.) represents a glass transition temperature of the crystalline polyester resin for toner, and Mp (° C.) represents a melting point of the crystalline polyester resin for toner.

Abstract: The method for manufacturing core-shell structure fine particles, includes adding metal salt into an aqueous medium containing shell particles A and core particles B to thereby attach the shell particles A to the surface of each of the core particles B and the toner contains the core-shell structure fine particles. (1) The zeta potential of the core particles B and the zeta potential of the shell particles A are the same polarity. (2) |Zeta potential of the core particles B when adding metal salt|<|Zeta potential of the shell particles A when adding metal salt| (3) (Median diameter based on the volume of the core particles B)>(Median diameter based on the volume of the shell particles A).

Abstract: Provided is a method for producing core-shell structured resin particles, comprising the steps of: providing a dispersion liquid of hydrophobic resin particles in which the hydrophobic resin particles are dispersed into an aqueous medium containing an anionic surfactant A and an anionic surfactant B; providing a dispersion liquid of resin microparticles in which resin microparticles are dispersed into an aqueous medium; mixing the dispersion liquid of hydrophobic resin particles and the dispersion liquid of resin microparticles; adhering the resin microparticles to surfaces of the hydrophobic resin particles by adding a water soluble metal salt to a mixture resulting from above step, wherein the surfactant A and the surfactant B satisfy the specific conditions.

Abstract: The present invention provides a crystalline polyester resin for toner that has, when used as a resin for toner, a sharp melt property, excellent fixing performance and blocking property and a preferable charging performance. Provided is a crystalline polyester resin for toner, which is obtained by condensation polymerization of a dicarboxylic acid component containing at least one compound selected from the group consisting of terephthalic acid, 2,6-naphthalenedicarboxylic acid and derivatives thereof, and a diol component containing at least one compound selected from the group consisting of 2-methyl-1,3-propanediol, 2,2-dimethyl-1,3-propanediol and derivatives thereof, the crystalline polyester resin having a weight-average molecular weight of not less than 5000 and not more than 50000.

Abstract: This invention provides a manufacturing method capable of manufacturing core-shall structure particles even when using fine particles manufactured under the conditions of substantially not using a solvent as shell particles and toner containing the fine particles. The method for manufacturing core-shell structure fine particles, includes adding metal salt into an aqueous medium containing shell particles A and core particles B to thereby attach the shell particles A to the surface of each of the core particles B and the toner contains the core-shell structure fine particles. (1) The zeta potential of the core particles B and the zeta potential of the shell particles A are the same polarity. (2) |Zeta potential of the core particles B when adding metal salt|<|Zeta potential of the shell particles A when adding metal salt| (3) (Median diameter based on the volume of the core particles B)>(Median diameter based on the volume of the shell particles A).

Abstract: An image forming apparatus is configured to form a toner image by a toner image forming portion on an intermediate transfer belt, to transfer the toner image to a transfer and fixing belt, and to form a toner film by heating and pressurizing the toner image on the transfer and fixing belt. The transfer and fixing belt includes an elastic layer and when the toner film is pressurized to a recording medium in a body at a toner film transfer portion, the toner film is pressed to the recording medium while following surficial ruggedness of the recording medium. Because the toner image is formed by using toner particles containing a thermoplastic elastomer having crystallinity, the toner film formed of this toner image is fully resilient.

Abstract: Provided is a method for producing core-shell structured resin particles, comprising the steps of: providing a dispersion liquid of hydrophobic resin particles in which the hydrophobic resin particles are dispersed into an aqueous medium containing an anionic surfactant A and an anionic surfactant B; providing a dispersion liquid of resin microparticles in which resin microparticles are dispersed into an aqueous medium; mixing the dispersion liquid of hydrophobic resin particles and the dispersion liquid of resin microparticles; adhering the resin microparticles to surfaces of the hydrophobic resin particles by adding a water soluble metal salt to a mixture resulting from above step, wherein the surfactant A and the surfactant B satisfy the specific conditions.

Abstract: An object of the present invention is to provide a toner that produces an excellent bending resistance in the output image and that also exhibits an excellent low-temperature fixability and an excellent storage stability. This toner includes a binder resin and a thermoplastic elastomer having a crystalline part, wherein the binder resin and the thermoplastic elastomer in the toner are compatible with each other and the toner has a crystalline part originating from the thermoplastic elastomer.

Abstract: The present invention relates to a recording liquid comprising at least: a pigment (a); and a polymer (b) having one or more types of bond selected from the group consisting of amide bond, urethane bond and urea bond in the molecule, having a weight-average molecular weight of 5000 to 300000 and having an acid value of free acid of not less than 55 mgKOH/g and less than 150 mgKOH/g, the surface tension of said recording liquid being 25 to 54 dyne/cm.

Abstract: The present invention relates to a recording liquid comprising at least:

Abstract: A recording liquid characterized in that when it is printed with 100% duty and with a resolution of 600×300 dpi on an electrophotographic paper having a S.A.D (Surface Area Difference) of from 6.0 to 9.0 and a pH of from 6 to 8, the S.A.D. of the printed portion is at least 59.5.

Abstract: A recording liquid characterized in that when it is printed with 100% duty and with a resolution of 600×300 dpi on an electrophotographic paper having a S.A.D (Surface Area Difference) of from 6.0 to 9.0 and a pH of from 6 to 8, the S.A.D. of the printed portion is at least 59.5.

Abstract: A recording liquid characterized in that when it is printed with 100% duty and with a resolution of 600×300 dpi on an electrophotographic paper having a S.A.D (Surface Area Difference) of from 6.0 to 9.0 and a pH of from 6 to 8, the S.A.D. of the printed portion is at least 59.5.

Abstract: The present invention relates to a recording liquid comprising at least a pigment (a) and a polymer (b) having one or more types of bond selected from the group consisting of amide bond, urethane bond and urea bond in the molecule and having an acid value of free acid of 55 to 350 mgKOH/g,

Abstract: A method for producing oxidation-treated carbon black, which comprises oxidizing carbon black by ozone in the presence of water until the total amount of acid groups of the carbon black becomes at least 3 .mu.equ/m.sup.2.

Abstract: A recording liquid comprising an aqueous medium and carbon black having the following physical properties:1 DBP oil absorption: at least 140 ml/100 g2 Volatile matter: at most 4% by weight.