Photosensitive member to be used for image-forming apparatus and image-forming apparatus comprising such photosensitive member

摘要

A photosensitive member to be used for an image-forming apparatus effectively suppresses the effect of wetting the foreign matters adhered to the surface thereof, reduces the load of the cleaning unit and prolong the service life of the photosensitive member so that the image-forming apparatus may be down-sized. In the photosensitive member, the surface free energy ( gamma ) on the uppermost surface of the photosensitive member is made between 35 and 65mN/m and the variation of the surface free energy DELTA gamma is made less than 25mN/m during long operation. <IMAGE>