摘要:
An image forming method for forming a full color toner image by overlaying four color electrostatic image developing toners of black, yellow, magenta and cyan, wherein at least one of the four color electrostatic image developing toners is a toner containing a large diameter external additive in a larger amount and at least one is a toner containing the large diameter external additive in a smaller amount, in which the primary particle diameter of the large diameter external additive is from 150 nm to 2,000 nm, the content of the large diameter external additive in the toner containing the large diameter external additive in larger amount is from 0.06% by weight to 4.0% by weight and the content of the large diameter external additive in the toner containing the large diameter external additive in the smaller amount is not more than 0.05% by weight.
摘要:
An electrophotographic image forming method is disclosed. The method comprises developing latent images each formed on a static latent image forming member by serially arranged plural image forming units each including a toner to form toner images, respectively, successively transferring the toner images onto an image support so as to form a piled up image, and fixing the piled up image by a fixing device having a rotatable heating member including a heater fixed therein and a pressing member, and in the method the toner for developing the latent image has a variation coefficient of the shape coefficient of not more than 16% and a number variation coefficient of the particle diameter distribution in number of not more than 27%.
摘要:
An image forming method, comprising steps of: forming a latent image on a photoreceptor having an electrically conductive support having thereon a charge generating layer and a charge transporting layer; developing the latent image with a developer containing a toner to form a toner image on the photoreceptor; and transferring the toner image onto an image receiving member, wherein the ratio of 50% volume particle diameter to 50% number particle diameter of the toner is within the range of 1.0 to 1.15, the ratio of the cumulative 75% volume particle diameter from the largest particle diameter to the cumulative 75% number particle diameter from the largest particle diameter of the toner is 1.0 to 1.20 and the number of toner particles having a particle diameter of not larger than 0.7×Dp50 is at most 10% of the number of all the toner particles in the toner.
摘要:
An image forming method by developing an electrostatic latent image formed on a photoreceptor to form a toner image employing a developer comprising toner, transferring the toner image onto an image forming material, and fixing the transferred toner image employing a fixing unit, is disclosed. The fixing unit is comprised of a heating roller and a pressure roller which is brought into contact with said heating roller, the heating roller is constituted of a cylinder having an interior diameter of from 10 to 70 mm and a wall thickness of from 0.1 to 2 mm comprised of a metal or a metal alloy, and a heating member being incorporated in the interior, a surface of the cylinder being covered with an elastic martial having an Asker hardness C of less than 70 degrees at a thickness of 0.1 to 30 mm, and the pressure roller is constituted of a metal cylinder whose surface is covered with an elastic material having an Asker hardness C of less than 80 degrees at a thickness of from 0.1 to 30 mm.
摘要:
Disclosed is a toner for developing an electrostatic latent image, comprising colored particles containing a colorant and a binder resin, and fine particles, wherein said fine particles have a releasing index of 10 to 50 in terms of a turbidity.
摘要:
A fixing method comprises the step of passing a recording material with a toner image between a heat fixing member and a pressure applying member to fix the toner onto the recording material, a silicone oil being coated on the surface of the heat fixing member, wherein the toner contains a binder resin and a low molecular weight polyolefin, and the silicone oil is a fluorine-containing silicone oil having a structure unit represented by the following Formula (I): ##STR1## wherein X represents a saturated hydrocarbon group having 1 to 4 carbon atoms or an aryl group; R.sub.f represents a fluoroalkyl group having 2-10 carbon atoms; and n represents an integer of 1 to 4.
摘要:
Disclosed is a developer comprises a toner containing colorant particles and organic fine particles, wherein said organic fine-particles are a fluoro-containing acrylate homopolymer or the copolymers thereof, each having a cross-linking structure.
摘要:
A toner preparation process is disclosed. The process comprises a step of stirring the premixed colored resin particles and inorganic fine particles in the presence of mixing medium having a substantially spherical shape in the container, and a step of collecting toner particles comprised of the colored resin and inorganic particles thereon having a predetermined size by classifying at the stirring step.A continuous method for manufacturing a toner for an electrostatic imaging is provided. The resulting toner is low in electricity consumption, free from limitation on processing volume, and the method is capable of improving productivity and reducing manufacturing cost.
摘要:
A method for forming an electrophotographic image, comprising forming an electrostatic latent image on a latent image carrier, developing said latent image with a developer to form a toner image, transferring said toner image on a recording material, and fixing the toner image with a heat roller, is disclosed. The method is characterized by:1) said developer comprises an inorganic fine particle having pH of not lower than 7.0, and2) a resin coating layer containing carbon black is provided on said heat roller, and is grounded.
摘要:
A developing roller that can form a toner image with high quality includes: a supporting shaft, and at least one resin layer formed on a peripheral face of the supporting shaft, the resin layer containing carbon black in which a number average Feret's diameter is in a range from 5 to 300 nm and primary particles account for 5% or more on a number basis, and the carbon black being dispersed in a base resin material thereof.