JP2018205703A5 - - Google Patents

Claims (10)

An endless belt-shaped electrophotographic belt having a conductive base layer containing a thermoplastic resin and carbon black.
The base layer is a cylindrical extruded product of a resin mixture containing the thermoplastic resin and the carbon black.
A transmission electron microscope (TEM) is used under the conditions that the cross section of the cylindrical extruded product has a resolution of 0.01 nm / pixel or more and 1 nm / pixel or less, a minimum gradation of more than 0, and a maximum gradation of less than 255. in observation, to obtain a TEM image, further, from the TEM image, the area ratio of the carbon black is occupied by 50% or more, extracting a square region one side is 100 nm, in the square area, the carbon Pixels adjacent to each other among a plurality of pixels constituting 1 frequency% from the lowest gradation side in a gradation distribution in which the gradation information of each pixel constituting the square region is frequency-distributed due to black An electrophotographic belt characterized in that the area of the group is 10 nm ^{2 or more.} The electrophotographic belt according to claim 1, wherein the thermoplastic resin is polyetheretherketone or polyphenylene sulfide. The electrophotographic belt according to claim 1 or 2, wherein the average film thickness of the base layer is 25 μm or more and 100 μm or less. The electrophotographic belt according to any one of claims 1 to 3, wherein the carbon black has a convex portion derived from an organic compound on the surface. The electrophotographic belt according to claim 4, wherein the carbon black is formed by adhering an organic substance to the surface of the raw material carbon black and firing the organic substance. The electrophotographic belt according to claim 5, wherein the raw material carbon black is acetylene black. Electrophotographic photosensitive member and
An intermediate transfer belt on which an unfixed toner image formed on the electrophotographic photosensitive member is primarily transferred, and an intermediate transfer belt.
Secondary transfer means for secondarily transferred to a recording medium the toner image transferred to the transfer belts between intermediate,
It is an electrophotographic image forming apparatus equipped with
An electrophotographic image forming apparatus according to any one of claims 1 to 6, wherein the intermediate transfer belt is an electrophotographic belt. It is a method of manufacturing an electrophotographic belt.
The process of adhering organic substances to the surface of the raw material carbon black,
A step of obtaining treated carbon black by firing the raw material carbon black having the organic substance adhered to the surface at a temperature equal to or higher than the thermal decomposition start temperature of the organic substance and lower than the decomposition temperature of the raw material carbon black.
A step of melt-kneading the treated carbon black and a thermoplastic resin to obtain a conductive resin composition, and
A method for producing an electrophotographic belt, which comprises a step of melt-extruding the conductive resin composition into a tube shape. The method for producing an electrophotographic belt according to claim 8, wherein the organic substance is a nonionic surfactant. The method for producing an electrophotographic belt according to claim 9, wherein the nonionic surfactant is a polyoxyethylene alkyl ether.