Patent application number | Description | Published |
20080286674 | Toner and Method for Producing the Same - A method for producing a toner is described. The method for producing a toner may include the steps of: preparing a resin solution by mixing a binder resin, a colorant and a wax into an organic solvent; preparing an emulsion by heating the resin solution and an aqueous medium to a temperature of not less than a level allowing the wax to dissolve and less than the boiling point of the organic solvent, and mixing the resin solution and the aqueous medium with each other; and preparing a suspension by removing the organic solvent from the emulsion, and aggregating and fusing the suspension. | 11-20-2008 |
20080292362 | Developing Apparatus - A developing apparatus is described. The developing apparatus includes a transport member including a plurality of electrodes forming a traveling wave electric field by successively applied voltages and a casing storing a toner transported by the transport member, wherein the activity of the toner based on the following measuring method shown in (1) to (3) is not more than 2.0×10 | 11-27-2008 |
20090123866 | Method For Producing Toner - A method for producing toner is described. In the method for producing a toner, a resin liquid is prepared by mixing at least a binder resin made of polyester resin and a colorant with an organic solvent, the resin liquid is dispersed in an aqueous medium to form an emulsion, and the organic solvent is removed from the emulsion to produce a toner. The organic solvent before preparation of the resin liquid contains 5 to 20 parts by weight of water per 100 parts by weight of the organic solvent. | 05-14-2009 |
20090191477 | Method For Producing Toner - Provided is a method for producing a toner including the steps of: preparing a resin liquid by mixing at least a binder resin made of polyester resin and a colorant with an ester organic solvent represented by the following general formula (1); dispersing the resin liquid in an aqueous medium to form an emulsion; and removing the ester organic solvent from the emulsion to produce a toner, in which the ester organic solvent before the preparation of the resin liquid contains water in an amount of not less than 1% by weight and up to the saturation solubility at 25° C. to the ester organic solvent. | 07-30-2009 |
20090325101 | Method for Producing Toner - The present teachings provide a method for producing a yet superior toner by emulsification aggregation. The method for producing toner by emulsification aggregation comprises the following steps (a) and (b): (a) preparing primary base particles through aggregation and fusion of base microparticles obtained by emulsifying and dispersing a binder resin of the toner; and (b) producing secondary base particles by aggregating the primary base particles with the base microparticles. | 12-31-2009 |
20100248115 | Method for Producing Toner - Provided is a method for producing a toner having excellent particle size distribution and storage stability. The method set forth in the present specification is a method for producing a toner by aggregating and fusing base microparticles whose main component is a binder resin including anionic groups, wherein an aggregate is produced by aggregating the base microparticles in a base microparticle suspension, in a presence of a non-ionic surfactant such that a surface tension of an aqueous solution thereof is not lower than 45 mN/m at any concentration at or above a critical micelle concentration, and the toner is produced through fusion of the aggregate. According to this method, drops in a glass transition temperature of the toner can be curbed, and the toner having excellent storage stability and good particle size distribution can be obtained. | 09-30-2010 |
20120082929 | Toner Block - There is provided a toner block, which is formed by preparing a toner suspension in which toner particles are dispersed in water so that a water amount is 32.5 to 37% by mass; absorbing water contained in the toner suspension by a water absorptive material which absorbs 0.2 ml of water within 3 minutes to prepare an aggregate of the toner particles containing water of not more than 32.3% by mass; and drying the aggregate, and which has a maximum compressive stress of 80000 to 550000 N/m | 04-05-2012 |
20120082930 | Method for Producing Toner Block - There is provided a method for producing a toner block. The method includes: preparing a toner suspension in which toner particles are dispersed in water so that the toner suspension is a dilatant fluid; preparing an aggregate of the toner particles in a form of cake by absorbing water contained in the toner suspension by a water absorptive material; and drying the aggregate. | 04-05-2012 |
20130260304 | Toner and Method for Producing the Same - There is provided a toner, including toner mother particles which contain a binder resin, a colorant, and a wax, wherein a difference between a density of the wax in a solid state and a density of the wax in a liquid state is not less than 0.11 g/cm | 10-03-2013 |