摘要:
A toner includes toner particles including particles having a flaky shape and made of bright pigment material and a binder resin coated on the surfaces of the particles. A ratio of an exposed surface area of the particles with respect to a surface area of the toner particles is greater than 0% and equal to or smaller than 20%.
摘要:
To provide a water-soluble working fluid which less adversely affects the human body and the ecological system as compared with conventional water-soluble working fluids, which has high rotting resistance, and which provides excellent working performance. The water-soluble working fluid of the invention contains methyldicyclohexylamine.
摘要:
According to one embodiment, a developer includes a toner which contains toner particles containing a binder resin and a coloring agent and also contains inorganic fine particles added to the surfaces of the toner particles, and is obtained through sieving after adding the inorganic fine particles to the toner particles, wherein a first adhesion force Fa1 (%) of the inorganic fine particles to the toner particles before sieving and a second adhesion force Fa2 (%) of the inorganic fine particles to the toner particles after sieving satisfy the following formulae (1) and (2). |Fa2−Fa1| 65 (2)
摘要:
According to one embodiment, a method for producing a developing agent includes pulverizing a mixture in the form of coarse particles of a toner material including a coloring agent and a binder resin by mechanical shearing, aggregating and fusing the resulting fine particles. The solid content concentration in a dispersion liquid including the aggregated particles is from 5.0% to 40.0%, the volume average particle diameter of the aggregated particles is from 1.0 μm to 10.0 μm, and the ratio of the standard deviation to the volume average particle diameter is 30.0% or less.
摘要:
As a first dispersion liquid containing first fine particles and a second dispersion liquid containing second fine particles, those satisfy the relationship represented by the following formula (1) are used, and these two dispersion liquids are mixed with each other, and an aggregating agent and a pH adjusting agent are added thereto in sequence, whereby encapsulation is achieved by selective formation of core particles through aggregation of the first fine particles and shells through aggregation of the second fine particles. 15 mV≧|Z2−Z1|≧5 mV (1) In the formula, Z1 and Z2 represent zeta potentials of the first dispersion liquid and the second dispersion liquid, respectively, measured when aluminum sulfate is added to each dispersion liquid in an amount of 1% by weight based on the solid content in each dispersion liquid.
摘要:
The method for producing a developing agent according to the invention contains subjecting the toner material dispersion liquid to mechanical shearing to make the granular mixture into fine particles, thereby providing a dispersion liquid containing fine particles having a smaller particle diameter than a particle diameter of the granular mixture. The toner material dispersion liquid is subjected to mechanical shearing under a temperature of a glass transition point Tg of the binder resin or more and a pressure of 10 MPa or more, and the resulting dispersion liquid containing the fine particles is depressurized with two or more stages while maintaining the temperature of a glass transition point Tg of the binder resin or more and then cooled to a temperature of a glass transition point Tg of the binder resin or less.
摘要:
In a bending method of bending a pipe material of metal in pipe working, at first particles are fed into a flow passage of the pipe material, the particles being removable in a liquid phase. The pipe material with the particles is bent. The particles in an at least partially liquid phase are removed from the pipe material, to clean the flow passage. The particles are meltable, or soluble in dissolving liquid. Specifically, in the removing step, the dissolving liquid is supplied into the flow passage, the particles are dissolved in the dissolving liquid, and compressed air is blown in the flow passage to eject the fluid obtained by dissolving the particles in the dissolving liquid. The particles are granulated sugar, and the dissolving liquid is warmed water.
摘要:
In a color image forming method comprising the steps of forming a primary transferring image comprising plural developer images in different colors on an intermediate transferring belt by repeating the process to develop and transfer developer images on an intermediate transferring belt and forming a secondary transferring image by transferring the primary transferring image on a transfer paper, absolute values of tribo-charge amount of plural kinds of developers are 10 to 30 μC/g, and an absolute value of tribo-charge amount of a developer used lastly for the development is larger than that of a developer first used for the development and a difference between them is more than 2 μC/g×(number of developers used −1).
摘要:
A sepiomelanine pigment is employed as a coloring agent in a developing agent for forming sepia color, black color and full color images without employing carbon black.
摘要:
A coarse particle containing a polyester based resin and a coloring agent is added in an aqueous medium containing a surfactant, a basic substance and an inorganic water-soluble electrolyte, and dispersion and coagulation are carried out to form a toner particle.