Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

1. Field of the Invention 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 th...

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Bibliographic Details
Main Authors Tanaka, Daisuke, Morikawa, Yosuke, Ikezue, Tatsuya, Nakata, Kouichi, Yoshimura, Kimihiro
Format Patent
LanguageEnglish
Published 19.10.2004
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Summary:1. Field of the Invention 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 measured from the top of the protective layer and a coefficient of thermal expansion measured after the protective layer has been removed, | − |, is more than 5.0×10° C.to less than 1.0×10° C., 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.