| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a circular body providing a favorable output image in which the occurrence of an image quality defects such as a minute white spots and scale-like density unevenness on the output image, is suppressed. <P>SOLUTION: The circular body used for an image forming apparatus employing an electrophotographic system, includes at least two layers, an inner layer containing resin and an outer layer layered on an outer circumferential surface side of the inner layer, contains, as a conductive agent, polyaniline in the outer layer and carbon black in the inner layer, and satisfies following relational expressions (1) and (2). The expression (1): 13.0≤C1≤15.0, (2): 21.5≤C2≤25.0, wherein C1 represents the content (parts by mass) of the polyaniline with respect to 100 pts.mass of the resin forming the outer layer, and C2 represents the content (parts by mass) of the carbon black with respect to 100 pts.mass of the resin forming the inner layer. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
