| 摘要 |
In an electrophotographic photosensitive member comprising a cylindrical support, and provided thereon a photosensitive layer and a protective layer in this order, which cylindrical support has an outer diameter of less than 30 mm, the difference between a coefficient of thermal expansion alpha<subscript>1 </highlight>measured from the top of the protective layer and a coefficient of thermal expansion alpha<subscript>2 </highlight>measured after the protective layer has been removed, ??alpha<subscript>1</highlight>-alpha<subscript>2</highlight>??, is more than 5.0x10<superscript>-7>[deg.] C.<superscript>-1 >to less than 1.0x10<superscript>-4>[deg.] C.<superscript>-1>, and the modulus of elastic deformation We % measured from the top of the protective layer is more than 30% to less than 60%. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.
|
