Invention Grant
US08404416B2 Electrophotographic photoreceptor, process cartridge, and image forming apparatus 有权
电子照相感光体,处理盒和成像设备

Electrophotographic photoreceptor, process cartridge, and image forming apparatus
Abstract:
The invention provides an electrophotographic photoreceptor having a surface protection layer that satisfies the following requirements: (1) including a crosslinked substance of at least one selected from a guanamine compound or a melamine compound, and at least one charge transporting material having at least one substituent selected from —OH, —OCH3, —NH2, —SH or —COOH; (2) including the at least one of a guanamine compound or a melamine compound in an amount of from about 0.1 to about 5% by weight; and (3) having a universal hardness of from about 180 to about 220 N/mm2 and a creep ratio of from about 5% to about 8%, the universal hardness and the creep ratio being obtained by performing a hardness test by pushing a Vickers quadrangular pyramid diamond indenter against the surface protection layer at a maximum load of 20 mN, in an environment of 25° C. and a relative humidity of 50%.
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