Abstract: The invention provides: an electrostatic latent image developing toner comprising a non-crystalline resin, a crystalline resin having a melting point of 50 to 100° C., and a colorant, and satisfying the relationship represented by the following formula (1), wherein A represents the content of the crystalline resin (% by mass) in the entire toner, and B represents the content of the crystalline resin (% by mass) in a classified toner which has been prepared by classifying the toner such that the volume average particle diameter thereof is in the range of (?)×D50T to (?)×D50T, wherein D50T represents the volume average particle diameter of the entire toner, and a method for producing the same, as well as an electrostatic latent image developing developer, a toner cartridge, a process cartridge, and an image forming apparatus using the same.

Abstract: An electrophotographic toner having a core-shell structure including a crystalline resin in its core region or a sea-island structure including a crystalline resin in its island region, wherein the toner has 1) a resistance of 5.0×1012 ?·cm or higher, 2) a dynamic viscosity coefficient of 3×103 Pa·s or higher at a temperature which is 50° C. higher than a melting point of the crystalline resin, and 3) a dynamic viscosity coefficient of 1×105 Pa·s or lower at a temperature which is 10° C. higher than the melting point of the crystalline resin.

Abstract: A toner for electrostatic charge developing prepared by a production method including aggregating one or more kind of particles in a raw material dispersion including the particles to form aggregated particles, and coalescing the aggregated particles by heating. At least one kind of the particles is resin particles including an amorphous polyester resin synthesized by copolymerizing one or more polyvalent carboxylic acids and two or more polyhydric alcohols; at least one of the polyvalent carboxylic acids is polyvalent carboxylic acid having a sulfonic acid group; two of the polyhydric alcohols are an ethylene oxide adduct of bisphenol A and a propylene oxide adduct of bisphenol A; and the following equation (1) is satisfied.

Abstract: A toner for developing electrostatic images, comprising a binder resin and a colorant, the binder resin including a crystalline polyester resin and an amorphous resin. When, in differential scanning calorimetry of the toner according to ASTM D3418-8, the temperature of the endothermic peak derived from the crystalline polyester resin in a first heating process is defined as Tm1 (° C.), the endothermic quantity based on the endothermic peak in the first heating process is defined as ?H1 (mW/g), and the endothermic quantity based on the endothermic peak in a second heating process is defined as ?H2 (mW/g), Tm1 is 50 to 80° C, and ?H1 and ?H2 satisfy the relationship represented by the following Formula (1). When the softening temperature of the toner is defined as Tf1/2 (° C.), Tf1/2 is 85 to 135° C. Tm1 and Tf1/2 satisfy the relationship represented by the following Formula (2): 0.35??H2/?H1?0.95??Formula (1) Tf1/2?205?(1.4×Tm1)??Formula (2).

Abstract: The present invention provides an electrostatic image developing toner comprising a binder resin, a colorant and a releasing agent, the toner having a temperature interval in which the value of loss elastic modulus varies 100 times or more within a temperature range of 10° C. in the temperature interval between 60 and 95° C. under measuring conditions of an angular frequency of 6.28 rad/sec and a temperature rise rate of 1° C./min, wherein the loss elastic modulus G? is 5×103 Pa or more and 5×104 Pa or less and the tangential loss is 1.5 or more and 3.0 or less in a temperature range from 100° C. to 140° C. under a measuring condition of a temperature change rate of 1° C./min.

Abstract: An electrophotographic toner having a core-shell structure including a crystalline resin in its core region or a sea-island structure including a crystalline resin in its island region, wherein the toner has 1) a resistance of 5.0×1012 ?·cm or higher, 2) a dynamic viscosity coefficient of 3×103 Pa·s or higher at a temperature which is 50° C. higher than a melting point of the crystalline resin, and 3) a dynamic viscosity coefficient of 1×105 Pa·s or lower at a temperature which is 10° C. higher than the melting point of the crystalline resin.

Abstract: The present invention provides an image forming method for efficiently thermoelectrically transferring and fixing a toner image formed on an electrostatic latent image carrier without scattering of the toner. The image forming method comprises the steps of charging a surface of an electrostatic latent image carrier; exposing the charged surface of the electrostatic latent image carrier to a light beam using optical data corresponding to image data to form a latent image; developing the latent image formed on the surface of the electrostatic latent image carrier with a developer for electrophotography containing a toner for electrophotography to form a toner image; and thermoelectrically transferring the toner image formed on the surface of said electrostatic latent image carrier onto a surface of a recording medium and simultaneously fixing thereon. The toner for electrophotography is comprised of a crystalline polyester resin, the surface temperature of a fixing unit therein is higher by 10° C.

Abstract: An image fixing method capable of favorably fixing a toner containing a crystalline resin is provided. A transfer medium having unfixed images formed of a color toner containing a binder resin that contains a crystalline resin and a colorant is passed between a heating member heated by way of an external heating unit and a pressurizing member, thereby fixing the unfixed images.

Abstract: An image fixing apparatus and an image forming method capable of favorably fixing a toner containing a crystalline resin are provided. The image forming apparatus passes a transfer medium having unfixed images formed of the toner containing a crystalline resin between a heating member and a pressurizing member, thereby fixing the unfixed images, using a cooling unit that controls a surface temperature of the pressurizing member in which the surface temperature is controlled to a melting point of the crystalline resin +30° C. or lower.

Abstract: The present invention uses a crystalline resin as a binding resin and provides a toner insuring excellent storability of a resulting image, a method of manufacturing the toner, an electrostatically charged image developer containing the toner, and an image forming method. In the electrophotographic toner containing toner mother particles comprising at least a binding resin and a colorant, a main component of said binding resin comprises a crystalline resin with a melting point in the range from 50 to 120° C. and an average volume particle size in the range from 3.0 to 7.5 ?m, while an average value of the BET specific areas of said toner mother particles is in the range from 0.6 to 3.0 m2/g. The electrophotographic toner manufacturing method comprises the steps of coalescing or associating the binding resin particles with colorant particles, and cooling the aggregated particles at the rate of at least 1° C.

Abstract: A toner for developing an electrostatic latent image, wherein in regard to the molecular weight by GPC of the THF dissolved components of the toner, the ratio of at least 5×105 in the integral molecular weight distribution is not higher than 1% by weight, the ratio of not higher than 3×103 is not higher than 30% by weight, and the ratio {W(5×103)/W(1×105)} of the ratio {W(5×103)} of not higher than 5×103 to the ratio {W(1×105)} of at least 1×105 is from 15 to 50. Also, the molecular weight by GPC of the THF dissolved components of the toner is distributed in the range of not larger than 1×106, the value of the differential molecular weight distribution of the molecular weight of 5×103 is not larger than 0.55%, and the value of the differential molecular weight distribution of the molecular weight of 1×105 is not larger than 0.15%.

Abstract: An image fixing method capable of favorably fixing a toner containing a crystalline resin is provided. A transfer medium having unfixed images formed of a color toner containing a binder resin that contains a crystalline resin and a colorant is passed between a heating member heated by way of an external heating unit and a pressurizing member, thereby fixing the unfixed images.

Abstract: An image fixing apparatus and an image forming method capable of favorably fixing a toner containing a crystalline resin are provided. The image forming apparatus passes a transfer medium having unfixed images formed of the toner containing a crystalline resin between a heating member and a pressurizing member, thereby fixing the unfixed images, using a cooling unit that controls a surface temperature of the pressurizing member in which the surface temperature is controlled to a melting point of the crystalline resin +30° C. or lower.

Abstract: An image forming method makes the warming-up time short, enables the formation of high-quality images even when fixing is performed continuously at high speed, and restrains degradations of the image quality, such as non-uniformity of gloss and non-uniformity of coloration even under high-temperature and high-humidity conditions. The method uses a toner that is wide in fixing range and is especially excellent in low-temperature fixing property. The method contains a process of melting and thereby fixing a toner image formed by unfixed toner, by heating a heating member that is in contact with the toner image. The surface of the heating member or its vicinity that is in contact with the toner image generates heat, and the toner contains at least a colorant and a binder resin having a crystalline resin with a number average molecular weight of 1500 or more as the main component.

Abstract: A toner for developing an electrostatic latent image, a process for producing the same and a process for forming an image using the same are provided. The toner is produced by a simple production process, with good reproducibility, particularly in particle size and particle size distribution. The toner is excellent in production stability, with a wide fixing region, and is also excellent in low temperature fixing property, production stability, storage stability of resin particles formed by the aggregation process, and charging property, particularly environmental stability and time-lapse stability. The toner for developing an electrostatic latent image contains a crystalline resin having a melting point as a binder resin, and at least one of an ester compound having an alkyl group having from 6 to 32 carbon atoms and a resin having a contact angle with water that is smaller than that of the crystalline resin.

Abstract: An electrophotographic toner contains a colorant and a binder resin which includes and a crystalline polyester resin as a main component. An ester density M of the crystalline polyester resin, as defined in the following Formula 1, is from 0.01 to 0.12: M=K/A  Formula 1 wherein M denotes an ester density, K denotes a number of ester groups, and A denotes a number of atoms which constitute the high molecular chain of a polymer.

Abstract: The present invention uses a crystalline resin as a binding resin and provides a toner insuring excellent storability of a resulting image, a method of manufacturing the toner, an electrostatically charged image developer containing the toner, and an image forming method. In the electrophotographic toner containing toner mother particles comprising at least a binding resin and a colorant, a main component of said binding resin comprises a crystalline resin with a melting point in the range from 50 to 120° C. and an average volume particle size in the range from 3.0 to 7.5 &mgr;m, while an average value of the BET specific areas of said toner mother particles is in the range from 0.6 to 3.0 m2/g. The electrophotographic toner manufacturing method comprises the steps of coalescing or associating the binding resin particles with colorant particles, and cooling the aggregated particles at the rate of at least 1° C.

Abstract: Provided is an image forming method capable of forming an image at a high speed, simultaneously performing a low temperature fusing property and hot offset resistance and controlling gloss. The image forming method includes a developing step of forming a toner image by developing an electrostatic latent image formed on a latent image holding member by a developer containing at least a toner, a transferring step of forming a transfer image by transferring the toner image formed on the latent image holding member onto a transfer material, and a fusing step of fusing the toner image transferred on the transfer material. In the image forming method, the toner contains at least a colorant and a binder resin in which a principal component is a crystalline resin and the fusing step is performed by a fusing apparatus having a heat-fixing roll and an endless belt.

Abstract: The present invention provides an image forming method for efficiently thermoelectrically transferring and fixing a toner image formed on an electrostatic latent image carrier without scattering of the toner. The image forming method comprises the steps of charging a surface of an electrostatic latent image carrier; exposing the charged surface of the electrostatic latent image carrier to a light beam using optical data corresponding to image data to form a latent image; developing the latent image formed on the surface of the electrostatic latent image carrier with a developer for electrophotography containing a toner for electrophotography to form a toner image; and thermoelectrically transferring the toner image formed on the surface of said electrostatic latent image carrier onto a surface of a recording medium and simultaneously fixing thereon. The toner for electrophotography is comprised of a crystalline polyester resin, the surface temperature of a fixing unit therein is higher by 10° C.

Abstract: Provided is an image forming method capable of forming an image at a high speed, simultaneously performing a low temperature fusing property and hot offset resistance and controlling gloss. The image forming method includes a developing step of forming a toner image by developing an electrostatic latent image formed on a latent image holding member by a developer containing at least a toner, a transferring step of forming a transfer image by transferring the toner image formed on the latent image holding member onto a transfer material, and a fusing step of fusing the toner image transferred on the transfer material.