摘要:
A black toner for developing electrostatic latent images having colored particles and external additive(s) and the colored particles containing at least a binder resin, carbon black, a cyan pigment, a magenta pigment, and a yellow pigment. The concentration (C.sub.CB weight %) of carbon black, the concentration (C.sub.C weight %) of the cyan pigment, the concentration (C.sub.M weight %) of the magenta pigment, and the concentration (C.sub.Y weight %) of the yellow pigment in the colored particles preferably satisfy the following relationship (1);C.sub.CB .gtoreq.C.sub.M .gtoreq.C.sub.C .gtoreq.C.sub.Y ( 1).The black toner has the charging property, etc., suitable for forming black images and a high black density without showing color rendering.
摘要:
The present invention provides a toner for developing an electrostatic latent image comprising of: toner particles containing at least a binder resin, a colorant and a releasing agent; wherein a volume-average particle diameter of the toner particles is in a range of about 5 to 8 μm; an average of shape factor SF1 of the toner particles is in a range of about 125 to 140; and an arithmetical mean undulation height of the surface of the toner particles at the 90% point on the cumulative distribution curve is in a range of about 0.15 to 0.25 μm. Further, the present invention provides an electrostatic latent image developer containing the toner. The invention also provides a method for producing the toner.
摘要:
An electrostatic latent image developing toner including, as a binder resin, a crystalline resin and at least one kind of non-crystalline resin, wherein, in a dynamic viscoelasticity measurement by a sine wave vibration method, a minimum value of the relaxation elasticity H in a relaxation spectrum obtained from frequency dispersion characteristics measured at temperatures of 60 and 80 degrees centigrade with a measurement frequency set in the range of 0.1 to 100 rad/sec and measurement strain set in the range of 0.02 to 4.5% is in the range of 10 to 900 Pa/cm2, and a relaxation time λ corresponding to the minimum value is in the range of 1 to 10,000 sec.
摘要翻译:一种静电潜影显影调色剂,其包含作为粘合剂树脂的结晶树脂和至少一种非结晶性树脂,其中,在通过正弦波振动法进行动态粘弹性测量中,将松弛弹性H的最小值 从在60摄氏度到80摄氏度的温度下测量的频率分散特性获得的弛豫频谱,其测量频率设定在0.1至100弧度/秒,测量应变设定在0.02至4.5%的范围内,其范围为10 至900Pa / cm 2,对应于最小值的弛豫时间λ在1至10,000秒的范围内。
摘要:
The present invention provides a toner for developing an electrostatic latent image comprising of: toner particles containing at least a binder resin, a colorant and a releasing agent; wherein a volume-average particle diameter of the toner particles is in a range of about 5 to 8 μm; an average of shape factor SF1 of the toner particles is in a range of about 125 to 140; and an arithmetical mean undulation height of the surface of the toner particles at the 90% point on the cumulative distribution curve is in a range of about 0.15 to 0.25 μm. Further, the present invention provides an electrostatic latent image developer containing the toner. The invention also provides a method for producing the toner.
摘要:
Provided is an image forming method including at least a latent image-forming step of forming an electrostatic latent image on a latent image support, a developer layer-forming step of forming a developer layer on a surface of a developer support disposed opposite the latent image support, a developing step of developing the electrostatic latent image on the latent image support with the toner in the developer layer to form a toner image, and a transferring step of transferring the toner image onto a transfer material, characterized in that the latent image support is obtained by forming at least an organic photoconductive layer on a surface of an electroconductive support, the toner is composed of color particles containing at least a binder resin and a coloring agent, a volume average particle diameter of the color particles is between 2.0 and 5.0 &mgr;m, the ratio of the color particles of 1.0 &mgr;m or less is 20% or less in terms of the number of distribution, and the ratio of the color particles exceeding 5.0 &mgr;m is 10% or less in terms of the number of distribution, and the coloring agent is pigment particles. The invention provides the image forming method which can give an image excellent in the fine line reproducibility and the gradation without the disorder of the image and which can suppress deterioration of the latent image support owing to damage or wearing-out of the surface of the latent image support having the organic photoconductive layer.
摘要:
An image forming method including developing an electrostatic latent image formed on an electrostatic latent image carrier with a toner containing colored particles comprised of at least a binder resin and a coloring agent to form a toner image, transferring the toner image to a transfer material to form a transferred image, and fixing the transferred image on the transfer material, wherein the toner is made up of at least a binder resin and colored particles containing a coloring agent, the volume mean particle size of the colored particles is from 2.0 to 5.0 .mu.m, the colored particles of 1.0 .mu.m or smaller are 20 number % or lower, and the colored particles of 5.0 .mu.m or larger are 10 number % or lower. The image forming method has a high reproducibility of fine lines and forms an image of a high quality without forming uneven gloss in the image and between the image area and the non-image area and without causing problems such as offset and paper clogging.
摘要:
The toner for developing an electrostatic charge image comprises a colorant, a binding resin and a resin copolymer of aliphatic hydrocarbon and aromatic hydrocarbon having 9 or more of carbon atoms. Preferably, the toner further comprises a wax. The endothermic peak of the wax at DSC is preferably from 70 to 100.degree. C. The petroleum resin copolymer preferably has a ring and ball softening point of from 80 to 170.degree. C., and the binding resin is preferably a polyester resin. The weight ratio of the aromatic hydrocarbon monomer and the aliphatic hydrocarbon monomer of the petroleum resin copolymer is preferably from 99:1 to 50:50.
摘要:
A positively chargeable carrier for developing electrostatic charge images having good surface staining resistance and good environmental reliance of charging is disclosed, which comprises a core material having formed thereon an interlayer having a triboelectrification controlling function and having a nitrogen atom content of from 5 ppm to 75 ppm based on the weight of the core material, and a releasable coated layer formed on the interlayer. A two-component developer using the carrier is also disclosed.
摘要:
The invention provides an electrophotographic toner having a crystalline polyester resin; a non-crystalline polyester resin; a colorant; and a releasing agent. A resin (i), that is included in a toluene-soluble component of the toner and having a molecular weight of 30,000 to 100,000 as measured by gel permeation chromatography relative to polystyrene standards, has an acid value A. A resin (ii), that is included in a toluene-soluble component of the toner and having a molecular weight of 8,000 to 12,000 as measured by gel permeation chromatography relative to polystyrene standards, has an acid value B. A resin (iii), that is included in a toluene-insoluble component of the toner, has an acid value C. The acid values A, B, and C satisfy the inequation of B>A>C. The invention further provides an electrophotographic developer using the toner, a toner cartridge storing the toner, and an image forming method using the developer.
摘要翻译:本发明提供具有结晶聚酯树脂的电子照相调色剂; 非结晶聚酯树脂; 着色剂 和脱模剂。 包含在调色剂的甲苯可溶组分中,通过凝胶渗透色谱法测定的分子量为30,000至100,000的树脂(ⅰ)的酸值为A。树脂(ⅱ), 包括在调色剂的甲苯可溶性组分中并且通过凝胶渗透色谱法相对于聚苯乙烯标准测量的分子量为8,000至12,000,具有酸值B.将包含在甲苯中的树脂(ⅲ) 调色剂的不溶成分,具有酸值C.酸值A,B和C满足B> A> C的不等式。 本发明还提供使用调色剂的电子照相显影剂,存储调色剂的调色剂盒和使用显影剂的图像形成方法。
摘要:
A toner for developing an electronic latent image, including toner particles containing a binder resin and a colorant, and an external additive, is provided. The external additive contains silica formed by a sol-gel method of which the surface is subjected to hydrophobic treatment and which has an average primary particle size of 80 to 300 nm, a water content of 3 to 15% and a volume resistivity of 1×1013 &OHgr;cm or more. The invention further provides an image forming method and an image forming apparatus using the same. The toner for developing an electrostatic latent image is good in transferability over a long period of time and gives a high image quality without causing an image defect.