cleaning unit with a cleaning blade for an image forming apparatus

摘要

A cleaning unit (8) comprises a cleaning blade (8a) for cleaning surface of photosensitive drum. When a sine-wave vibration of 10 Hz is applied to the cleaning blade, a peak temperature of loss tangent is 2-30[deg]C. Independent claims are also included for: (a) a process cartridge comprising an arrangement having cleaning unit(s) that cleans residual toner on a photosensitive drum; (b) an image-forming apparatus comprising a photosensitive drum (1) on which electrostatic latent image is formed, a charging unit for charging the photosensitive drum, an exposing unit for exposing a surface of photosensitive drum to form the electrostatic latent image, a developing unit (4) for supplying toner to the surface of photosensitive drum to form a toner image, a transferring unit including either a transfer member and an intermediate transfer element to transfer the toner image to a recording medium, and a cleaning unit; and a toner used for developing electrophotography, having a volume average particle size of 3-8 mu m, a ratio of volume average particle size and number average particle size of 1-1.4.