摘要:
A toner for electrophotography contains a binder resin and a coloring agent, and is characterized in that the binder resin contains a crystalline polyester resin, and a low-molecular compound having at least one of a naphthalene skeleton and a biphenyl skeleton, and the crystalline polyester resin contains 0.5 to 30 construction mole % of an aromatic dicarboxylic acid-derived constitutional component. Further, a developer for electrophotography and an image forming method using the toner for electrophotography are disclosed.
摘要:
A method of producing an electrostatic latent image developing toner that includes the steps of producing a resin particle dispersion by polymerizing, in a water-based solvent, a polymerizable monomer that includes a polymerizable monomer having a vinyl-based double bond, and washing the resin particle dispersion through contact with an organic solvent, wherein the washed resin particle dispersion, a colorant particle dispersion produced by dispersing a colorant, and a release agent particle dispersion produced by dispersing a release agent are mixed together, and following formation of aggregate particles by aggregation of the resin particles, the colorant particles and the release agent particles, heating is conducted to fuse the aggregate particles and produce the electrostatic latent image developing toner.
摘要:
The present invention provides a method of preparing a toner for electrostatic charge image development comprising the steps of a liquid mixture preparation process for preparing a liquid mixture by mixing at least a resin particle dispersion prepared by dispersing resin particles in a solution including a dispersing agent having a polarity, and a coloring agent particle dispersion prepared by dispersing coloring agent particles in a solution including a dispersing agent having a polarity, an aggregated particle dispersion preparation process for preparing an aggregated particle dispersion by forming aggregated particles in the liquid mixture, and a fusion process for fusing the aggregated particles by heating, wherein the first dispersing agent and the second dispersing agent have the same polarity, a toner for electrostatic charge image development obtained by the method, an electrostatic charge image developer containing the toner and a carrier for electrophotography, and an image forming method comprising the steps of a process for forming an electrostatic latent image on an electrostatic latent image carrying member, a process for forming a toner image by developing the electrostatic latent image by a developer layer on a developing carrying member, and a transfer process for transferring the toner image onto a transferring member.
摘要:
An electrostatic latent image developing toner is provided for which if surface area values for 1-butanol, ethylbenzene, n-butyl ether, styrene, butyl propionate, cumene, benzaldehyde and propylbenzene obtained from gas chromatographic analysis of volatile gas components generated upon heating the toner are termed, a, b, c, d, e, f, g and h respectively, then Z1 and Z2 satisfy the formulas shown below. Z1=5.2×10−6a+9.6×10−7b+2.7×10−6c−2.5×10−6d+8.7×10−6e+1.5×10−7f+1.1×10−6g+8.3×10−7h−1.81 Z2=6.9×10−6a+4.6×10−6b−3.9×10−7c+2.5×10−6d−2.1×10−5e+2.3×10−7f−6.8×10−7g+1.2×10−6h−1.82 Z1≦0, and Z2≦0.9 (Formula 1)
摘要翻译:提供静电潜像显影调色剂,如果通过对加热调色剂产生的挥发性气体组分的气相色谱分析获得的1-丁醇,乙苯,正丁醚,苯乙烯,丙酸丁酯,异丙基苯,苯甲醛和丙苯的表面积值 分别称为a,b,c,d,e,f,g和h,则Z1和Z2满足下列公式。 <?in-line-formula description =“在线公式”end =“lead”?> Z 1 = 5.2×10 -6 a + 9.6×10 -7 b + 2.7 x10-6-c-2.5×10 -6 d + 8.7×10 -6 e + 1.5×10 -7 f + 1.1×10 -6 h-1.81 <?in-line-formula description =“In-line Formulas”end =“tail”?> <?in line-formula description =“In-line Formulas”end =“lead”?> Z 2 = 6.9×10 -6 a + 4.6×10 -6 b -3.9×10 6 > -7℃+ 2.5×10 -6 -6 -2 -6×10 -5 e + 2.3×10 -7〜f×10 -6×10 -6 > -7 i> g + 1.2×10 -6 h-1.82 <?in-line-formula description =“In-line Formulas”end =“tail”?> <?in-line- 公式描述=“内联公式”end =“lead”?> Z 1 <= 0,Z 2 <= 0.9(公式1)<?in-line-formula description =“In-line Formulas”end =“ 尾巴“?>
摘要:
A toner for electrophotography contains a binder resin and a coloring agent, and is characterized in that the binder resin contains a crystalline polyester resin, and a low-molecular compound having at least one of a naphthalene skeleton and a biphenyl skeleton, and the crystalline polyester resin contains 0.5 to 30 construction mole % of an aromatic dicarboxylic acid-derived constitutional component. Further, a developer for electrophotography and an image forming method using the toner for electrophotography are disclosed.
摘要:
The present invention provides an image forming process including the steps of: forming a latent image; developing the latent image with a toner to form a toner image; transferring the toner image onto a receiving body; and fixing the toner image to the receiving body, wherein the step of fixing is carried out using a fixing device including a heat-fixing roller, an endless belt, and a pressure member to allow the endless belt to travel around the heat-fixing roller at a given angle such that a nip is produced through which a recording sheet passes, with the pressure member being pressed to distort the heat-resistant elastic layer in the heat-fixing roller, and wherein the toner for developing the electrostatic latent image satisfies predetermined requirements.
摘要:
A toner composed of binder resin and carbon black particles has a volume-average particle diameter (D.sub.50) of 2.0 to 9.0 microns and a volume-average particle size distribution index (GSDv) of 1.25 or less. Carbon black particles adhering to the surfaces of toner particles have an absorption of 0.250 or less for ultraviolet radiation having a wavelength of 600 nm. Disclosed also are a method for producing the toner, a developer for developing an electrostatic latent image and a method in which the developer is used for forming animage.
摘要:
The toner for developing an electrostatic charge image has a sharp particle size distribution, an improved cleaning property even if the toner has small particle diameter, and a stable charging property, developing property and transfer property regardless of change of environment. By use of the toner, a highly precise image may be obtained.In a toner for developing an electrostatic charge image prepared by a wet process, the dielectric loss factor of the toner particles is 100 or less. In addition, when the toner particles are dissolved in an organic solvent and mixed with deionized water, the electrical conductance of the solution is desirably 100 ms or less and the surface tension thereof is desirably 20 mN or more. The toner may be obtained by forming agglomerated particles with stirring in a dispersion in which resin particles are dispersed to granulate; heating the toner particles to Tg or higher of the binder resin; stirring; and cleaning. With a wet process, the added stabilizing agent such as a surfactant can be removed.
摘要:
The present invention provides a tandem-type image forming method using a trickle developing system, wherein the average circularity of a toner contained in at least a supplementary developer used for appropriately supplying a developer to a developing device is in the range of 0.940 to 0.980. In the toner, the ratio of the number of particles having an average circularity of 0.970 or greater, in a particle diameter range of a toner circle-equivalent diameter×3/5 or less, is 5% or less, and the ratio of the number of particles having an average circularity of 0.950 or less, in a particle diameter range of a toner circle-equivalent diameter×7/5 or greater, is 10% or less.
摘要:
A toner for developing an electrostatic image, a process for producing the same, a developer for developing an electrostatic image and a process for forming an image are disclosed. The toner contains a resin, a colorant and a releasing agent, in which the toner has protrusions having a height of about from 0.05 to 2 μm, a part of the protrusions encompasses the releasing agent, and a proportion of elements derived from the releasing agent is about 10% by atom or less based on elements on a surface of the toner that is quantitatively determined by X-ray photoelectron spectroscopy.