摘要:
Disclosed is an electrostatic image developing toner comprising a coloring agent and toner particles, said toner particles have a matrix-domain structure, and the average of the area of a Voronoi polygon formed by the perpendicular bisecting line between the centers of gravity of domains adjacent to each other in said matrix-domain structure is from 20,000 to 120,000 nm2, and the variation coefficient of the area of said Voronoi polygon is less than or equal to 25 percent. Color image having, particularly good transparency and excellent color difference, can be obtained by the toner which is not affected by a residual material present on the surface of toner particles and does not result in variation of the amount of static charge at high temperature as well as at high humidity or after long leaving without operation.
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 toner image forming method, comprising steps of:(1) forming a latent image on an image carrying member,(2) developing said latent image with toner particles including a resin and a colorant so as to form a toner image, said toner particles having a volume average particle size of 5 to 10 .mu.m, and containing toner particles having particle sizes of not more than 5.04 .mu.m in 5 number.multidot.% to 60 number.multidot.%,(3) transferring said toner image onto an image receiving material, and(4) fixing said transferred toner image on said image receiving material, said fixing steps comprising(a) passing said image receiving material between a movable fixing member and a rotatable pressure applying member each having a surface facing each other,(b) heating said toner image by a heater incorporated in said fixing member, and(c) coating the surface of said fixing member facing said pressure applying member with a fluorine-containing silicone oil by a coating roller, said fluorine-containing silicone oil having a structure unit represented by Formula I: Formula I ##STR1## wherein X represents an alkyl group having 1 to 4 carbon atoms or an aryl group, Rf represents a fluoroalkyl group having 2 to 10 carbon atoms and n represents an integer of 1 to 4.
摘要:
An image forming method comprises the step of a) developing an electrostatic latent image with toner; b) transferring the developed image onto a recording material to obtain a toner image on the recording material; and c) passing the recording material with the toner image between a first member and a second member positioned against the first member to fix the toner on the recording material, a silicone oil having been coated on the surface of at least one of the members, the toner containing a blend of a cross-linked polyester resin and a styrene/acryl resin, wherein the MEK insoluble component content of the toner is 40 to 65 weight %, the MEK soluble component of the toner has a weight average molecular weight Mw of 5.times.10.sup.4 to 2.times.10.sup.5, a number average molecular weight Mn of 1.times.10.sup.3 to 2.times.10.sup.3 and Mw/Mn of 25 to 80, and the silicone oil is a fluorine-containing silicone oil having a structure unit represented by the following Formula (I): ##STR1##
摘要:
An image forming method is disclosed. The method comprises the steps of forming a latent image on a latent image carrying member, developing the latent image by a developer containing a toner, transferring the toner image onto an intermediate transfer member, transferring the toner image transferred on the intermediate transfer member onto a image forming support, and fixing the toner image formed on the image forming support, wherein the toner contains a resin and a colorant, and the toner is constituted by toner particles having a variation coefficient of the shape coefficient of not more than 16% and a number variation coefficient of the particle size distribution of not more than 27%.
摘要:
An image forming method is disclosed. The method comprises the steps of forming a latent image on a latent image carrying member, developing the latent image by a developer containing a toner, transferring the toner image onto an intermediate transfer member, transferring the toner image transferred on the intermediate transfer member onto a image forming support, and fixing the toner image formed on the image forming support, wherein the toner contains a resin and a colorant, and the toner is constituted by toner particles having a variation coefficient of the shape coefficient of not more than 16% and a number variation coefficient of the particle size distribution of not more than 27%.
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:
An image forming method is disclosed. The method comprises the steps of forming a latent image on a latent image carrying member, developing the latent image by a developer containing a toner, transferring the toner image onto an intermediate transfer member, transferring the toner image transferred on the intermediate transfer member onto a image forming support, and fixing the toner image formed on the image forming support, wherein the toner contains a resin and a colorant, and the toner is constituted by toner particles having a variation coefficient of the shape coefficient of not more than 16% and a number variation coefficient of the particle size distribution of not more than 27%.
摘要:
A carrier for developing an electrostatic latent image is disclosed. The carrier comprises a magnetite core and a resin coated on the magnetite core wherein the magnetite core contains FeO and Fe.sub.2 O.sub.3, the mole ratio of FeO/Fe.sub.2 O.sub.3 being 0.15/1.0 to 0.7/1.0, and the carrier contains a magnesium atom containing material at a surface of the carrier, magnesium atom content ratio at the surface being 1.5 to 5.0 (percent in the number of atoms).A developer for developing an electrostatic latent image using the carrier and a developing method using the carrier or the developer is also disclosed.
摘要:
A toner for forming an electrophotographic image is disclosed. The toner comprises (1) colored particles comprising a resin and a colorant, (2) fine resin particles comprising a polymer formed by condensation of melamine and formaldehyde, and have a volume average diameter of 0.01 .mu.m to 1.0 .mu.m, and (3) fine particles of an inorganic material (I) having a volume average diameter of 0.01 .mu.m to 0.20 .mu.m and a standard deviation of distribution of the volume average diameter G satisfying the condition of 10.ltoreq..sigma..ltoreq.30. It is particularly preferred that the toner is used as a tow componet developer together with a negatively chargeable carrier which comprises (1) magnetic core particles each coated with a coating layer comprising a mixture of homopolymer of an alicyclic methacrylate monomer and a homopolymer of an acyclic methacrylate monomer, or a copolymer of an alicyclic methacrylate monomer and an acyclic methacrylate monomer, and (2) a fine particles of an inorganic material (II).