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AssigneesHitachi, Ltd., Hitachi Chemical Company, Ltd.
InventorsFuminori Ishikawa, Kunihiro Tamahashi, Shigeharu Onuma, Masatoshi Wakagi, Masanobu Hanazono, Mitsuyoshi Shoji, Takayuki Nakakawaji, Yutaka Ito, Shigeki Komatsuzaki, Chiaki Yamabishi
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An electrophotographic photosensitive element, e.g. for a photocopier or laser printer, comprises a substrate and a plurality of layers on the substrate including a photoconductive layer of a-Si:H and a protective and lubricating layer which is outermost from said substrate. To provide wear resistance and long life-time of the protective and lubricating layer, this layer comprises a microporous solid material having a pore structure which extends substantially over the whole thickness of the material and a hydrophobic lubricant carried by said solid material. The lubricant includes a liquid film and often times a non-particulate solid film, and provides at least part of the outer surface of the element and is present also in the pores of said microporous solid material.
An electrophotographic photosensitive element comprising a substrate and provided thereon at least a photoconductive layer and a protective and lubricating layer, with said protective and lubricating layer providing an outermost surface of the element, said protective and lubricating layer comprising a solid film having a number of fine pores and a water-repellent lubricant having perfluoropolyoxyalkyl groups or perfluoropolyoxyalkylene groups impregnated into said pores and covering a surface of said solid film, said water-repellent lubricant being a liquid film that exudes from the pores to the outermost surface;
An electrophotographic photosensitive element comprising a substrate and provided thereon at least a photoconductive layer and a protective and lubricating layer, with said protective and lubricating layer providing an outermost surface of the element, said protective and lubricating layer comprising a microporous solid film having a number of fine pores and a water-repellent lubricant having perfluoropolyoxyalkyl groups or perfluoropolyoxyalkylene groups impregnated into said pores and covering a surface of said solid film, said water-repellent lubricant comprising a liquid film and a non-particulate solid film, said non-particulate solid film being immobilized through chemical linkage or implantation on the surface of said microporous solid film and said liquid film being impregnated into said pores and exuding from the pores to the outermost surface;
An electrophotographic photosensitive element comprising a substrate and provided thereon at least a photoconductive layer and a protective and lubricating layer, with said protective and lubricating layer providing an outermost surface of said element, said protective and lubricating layer comprising a solid film having a number of fine pores including a particulate inorganic filler and a water-repellent lubricant having perfluoropolyoxyalkyl groups or perfluoropolyoxyalkylene groups impregnated into said pores and covering a surface of said solid film;
An electrophotographic photosensitive element comprising a substrate and provided thereon at least a photoconductive layer and a protective and lubricating layer, with said protective and lubricating layer providing an outermost surface of the element, said protective and lubricating layer comprising a solid film having a surface roughness of not more than 0.1 .mu.m and a number of fine pores and a water-repellent lubricant having perfluoropolyoxyalkyl groups or perfluoropolyoxyalkylene groups impregnated into said pores and covering a surface of said solid film, said water-repellent lubricant comprising a liquid film that exudes from the pores to the outermost surface;
Dependencies are inferred from the claim text.