Patent application number | Description | Published |
20120064454 | PRODUCING METHOD OF TONER FOR DEVELOPING STATIC IMAGE - A method of producing a toner comprising toner particles containing a binder resin composed of a non-crystalline polyester resin having a crosslinking structure and a crystalline polyester resin is disclosed, the method comparing steps of;
| 03-15-2012 |
20120094229 | TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT AND PRODUCTION METHOD THEREOF - A toner comprising toner particles containing a binder resin comprising a crystalline polyester resin, a non-crystalline polyester resin and an acryl resin having a cross-link structure, and the acryl resin having a cross-link structure has a cross-link site derived from a crosslinking agent represented by the following formula (1): | 04-19-2012 |
20120100478 | ELECTROSTATIC IMAGE DEVELOPING TONER AND PRODUCING METHOD OF THE SAME - A method of producing an electrostatic image developing toner comprising toner particles comprising a binder resin containing at least a non-crystalline polyester resin having a crosslinking structure and a crystalline polyester resin, the method comprising the steps of (a-1) preparing a crystalline polyester resin particle aqueous dispersion liquid; (a-2) preparing a polymerizable unsaturated non-crystalline polyester resin aqueous dispersion liquid; (b) preparing crosslinking non-crystalline polyester resin particles by adding a radical polymerization initiator to the aqueous dispersion liquid of particles containing the non-crystalline polyester resin having a polymerizable unsaturated bond; (c) preparing core particles by aggregating at least the particles containing the crystalline polyester resin in an aqueous medium; and (d) preparing a shell layer containing the non-crystalline polyester resin having a crosslinking structure by fusing the particles containing the non-crystalline polyester resin having a crosslinking structure on surfaces of the core particles in an aqueous medium. | 04-26-2012 |
20120107741 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER AND METHOD OF MANUFACTURING THE SAME - Provided is a method of manufacturing toner by which the toner capable of forming high quality images and reproducing high density gradation, which exhibits an excellent high-temperature offsetting property together with excellent low-temperature fixability, and provides appropriate gloss with respect to images to be formed, can be stably prepared; and also provided is the toner. After conducting a step in which particles made of at least a crystalline polyester resin are coagulated to form core coagulated particles, and an unsaturated amorphous polyester resin particle is attached onto the surface of each of the core coagulated particles to form core-shell type coagulated particles, radical polymerization reaction is conducted by acting a radical polymerization initiator on the foregoing core-shell type coagulated particles to conduct a step in which a layer made of a crosslinking amorphous polyester resin is formed on the surface of each of the core coagulated particles. | 05-03-2012 |
20120225379 | TWO-COMPONENT DEVELOPER - A two-component developer is disclosed, composing a toner comprising parent toner particles with an attached external additive and a carrier provided with a resin covering layer on a surface of a core particle, wherein the resin covering layer comprises a binder resin comprising an acrylic resin and when the resin covering layer is divided in half to a core particle side and a surface side, a nitrogen element content of the core particle side is larger than a nitrogen element content of the surface side. | 09-06-2012 |
20120264050 | PRODUCTION PROCESS OF TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT - Disclosed is a production process of a toner for electrostatic image development, by which excellent toner particle size-controlling ability is achieved, and moreover the sharpening of a particle size distribution is achieved. | 10-18-2012 |
20120270149 | PRODUCTION PROCESS OF TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT - Disclosed is a production process of a toner for electrostatic image development, by which excellent toner particle size-controlling ability and moreover the sharpening of a particle size distribution are achieved. | 10-25-2012 |
20120328980 | PRODUCTION PROCESS OF TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT - The toner for electrostatic image development has excellent charge properties, by which excellent toner particle size-controlling ability is achieved, and moreover the sharpening of a particle size distribution is achieved. The toner is composed of toner particles containing a binder resin. The process has an aggregating step of adding an aggregating agent containing a transition element into an aqueous medium of dispersed fine binder resin particles to aggregate the fine binder resin particles, and an aggregation-stopping step of adding an aggregation stopper composed on a sulfur atom-containing compound exhibiting a reducing action on the aggregating agent. The aggregating agent is a salt of a bivalent or higher metal selected from Sr, Ti, V, Cr, Mn, Fe, Co, Ni and Cu. | 12-27-2012 |
20130137029 | TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT AND IMAGE FORMING METHOD - Disclosed are a toner for electrostatic image development which is able to realize enough charge stability over a long period of time as deterioration of a toner due to mechanical stress is prevented in a developing unit, and to prevent generation of filming, and an image forming method using the same. | 05-30-2013 |
20140220488 | IMAGE FORMING METHOD - Provided is an image forming method, in which excellent cleaning properties are obtained for a long period of time even when the process is employed to an image forming apparatus with a charging roller for charging a photoreceptor, and a favorable image can be formed while inhibiting occurrence of a black spots-like image defect even in a high temperature and high humidity environment. In the image forming method, charging of a photoreceptor in a charging step is performed by a charging roller. A toner for electrostatic image development includes toner base particles added with an external additive. The external additive contains at least first external additive particles composed of a polytetrafluoroethylene and second external additive particles composed of at least one selected from a fatty acid metal salt and an amide wax. The number average molecular weight of the polytetrafluoroethylene constituting the first external additive particles is 500 to 20,000, and the second external additive particles are added in a ratio of 0.01 to 0.5 parts by mass per 100 parts by mass of the toner base particles. | 08-07-2014 |
20140349228 | ELECTROSTATIC LATENT IMAGE DEVELOPING TONER, PRODUCTION METHOD OF THE TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT AND ELECTROPHOTOGRAPHIC IMAGE FORMATION METHOD - A toner for electrostatic latent image development of the present invention includes toner particles containing toner mother particles and an external additive. The external additive contains fatty acid metal salt particles, and a volume based particle diameter (size) distribution of the fatty acid metal salt particles has two peaks on a side of smaller size and a side of larger size, respectively. A volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of smaller size is 3.0 μm or smaller and a volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of larger size is larger than a volume based mean particle diameter of the toner mother particles. | 11-27-2014 |