JP2005215177A5 - - Google Patents

Claims (11)

In the charging member having at least one resin layer containing conductive particles,
The conductive particles have core particles and a surface layer made of a conductive material having a thickness of 0.5 to 10 nm on the core particles,
A primary particle size in the range of 10 to 500 nm, the charging member, wherein the or One body volume resistivity in the range of 10 ⁰ ~10 ⁵ Ω · cm. 2. The charging member according to claim 1, wherein a particle size distribution of the conductive particles is in a range of 1.2 <D85 / D15 <12, where D15 is a cumulative 15% from the fine particle side of the cumulative particle size distribution. Particle size, D85 is the cumulative particle size of 85% from the fine particle side of the cumulative particle size distribution) .   The charging member according to claim 1, wherein a shape factor SF-1 of the conductive particles is in a range of 150 to 200.   The charging member according to claim 1, wherein the conductive material is carbon black.   The charging member according to claim 4, wherein the carbon black is acidic carbon black. 6. The charging member according to claim 4, wherein the surface layer is formed by adhering carbon black to the surface of the core particle while applying shear. The charging member according to claim 6, wherein the surface layer does not have a carbon black structure. The charging member according to claim 1, wherein the core particle is made of any one selected from silica, iron oxide, and calcium carbonate. An image carrier, a charging unit that charges the image carrier to a predetermined potential, an exposure unit that forms an electrostatic latent image on a charging surface of the image carrier, and an electrostatic image formed on the image carrier. a developing unit that by transferring toner to the latent image to form a toner image visualized, an image forming apparatus having a transfer means for transferring the toner image to a transfer member, it is the charging means, according to claim 1-8 An image forming apparatus, wherein the image bearing member is charged by applying only a DC voltage to the charging member. A charging method for charging an object to be charged with a charging means, wherein the charging means is the charging member according to any one of claims 1 to 8 , and only the DC voltage is applied to the charging member to charge the object to be charged. A charging method, characterized by comprising: A toner image that is visualized by transferring toner to an electrostatic latent image formed on an image carrier is formed, and the toner image is transferred to a member to be transferred to form an image. Process cartridge,
An image carrier, developing means for transferring toner to an electrostatic latent image formed on the image carrier to form a visualized toner image, and the image carrier after the toner image is transferred to the transfer member. process the one or more selected cleaning unit Toka et removing the toner remaining on the body, a charging member according to any one of claims 1 to 8, characterized in that it is integrally supported cartridge.