摘要:
An electrophotographic photoreceptor includes an intermediate layer, a photosensitive layer, and a surface layer laminated on a conductive support in this order, wherein a cured product of a polymerizable monomer contains an electron transport agent and n-type metal oxide fine particles to which a reactive organic group is bonded in the surface layer.
摘要:
An electrophotographic photoconductor includes a conductive support; and a photoconductive layer that contains at least a charge generation material, a hole transport material, an electron transport material and a binder resin, and that is provided on the conductive support, wherein the photoconductive layer has an outermost layer that contains a charge generation material, a hole transport material, an electron transport material, a binder resin and a highly branched polymer that is obtained by polymerizing, in the presence of a polymerization initiator, a monomer having, in a molecule, two or more radically polymerizable double bonds and a monomer having, in a molecule, a long-chain alkyl group or an alicyclic group and at least one radically polymerizable double bond. The electrophotographic photoconductor exhibits superior operational stability and stably high image quality, without problems with image memory, a contact member, or image defects due to cracks caused by contamination by oils/fats or sebum.
摘要:
An overcoat layer and method to make an overcoated photoconductor drum of an electrophotographic image forming device using irradiation such as with electron beam (EB) or ultraviolet (UV) light is provided. The photoconductor drum is then cured using EB dose of between 10 and 100 kiloGrays (kGy), preferably between 20 and 40 kGys or UV irradiation with an exposure of between 0.1 and 2 J/cm2. The unique overcoat layer of the present invention is formed having a biphasic morphology comprised of a highly cured crosslinked phase and a second phase enriched in uncured material. The desired amount of uncured uncrosslinked material found in the second phase of the biphasic structure, is between 2-70 wt % range, with particularly good combination of long-life and electrical performance when present at the 5-50 wt % level, and the best performance at the 15-40 wt % level. The biphasic morphology of the overcoat layer using the method of the present invention gives rise to the good wear rates while allowing rapid transport of the electrical charge and thus fast discharge properties of the photoconductor drum.
摘要:
Embodiments pertain to a novel imaging member, namely, an imaging member or photoreceptor comprising a protective outer layer which comprises light-absorbing composition that substantially prevents any light absorption by the overcoat layer. The composition comprises a low strength thermal plastic resin and a high optical density yellow dye. Thus, the light-blocking protective layer reduces the intrinsic light shock suffered by conventional overcoat layers without negatively impacting electrical properties of the overcoat layer and while improving print quality.
摘要:
Presently disclosed embodiments relate to an improved electrophotographic imaging member or photoreceptor comprising a surface layer on the photoreceptor, where the surface layer comprises secondary electron emitting materials that act as a robust electrically active layer. Photoreceptors incorporating such materials into or on the surface will exhibit an increase photoreceptor life and also a reduction the operating voltage of bias charge roll (BCR) charging systems while maintaining excellent charge uniformity.
摘要:
An electrophotographic photoreceptor is disclosed, comprising, on an electrically conductive substrate, a photosensitive layer and a surface layer provided sequentially in that order, in which the surface layer is a layer formed by polymerizing a polymerizable compound (I) containing seven to ten functional groups and exhibiting a reactive group equivalent of not more than 140 and not less than 100.
摘要:
An imaging member having an overcoat layer formed from a high viscosity overcoat composition. The viscosity of the overcoat composition is sufficient for reducing or preventing the diffusion of charge transport molecules into the overcoat layer. For example, in one embodiment the magnitude of diffusion of charge transport molecules is controlled by the viscosity of the overcoat composition used to form the overcoat layer. Other embodiments are also disclosed.
摘要:
A polycarbonate resin has a constitutional unit expressed by the following general formula (I): A1 represents an alkyl group which is substitutional or nonsubstitutional, and an aryl group which is substitutional or nonsubstitutional. A2,A3,A4,A5,A6 and A7 each represent one of a hydrogen atom, a halogen atom, an alkyl group which has 1 to 6 carbon atoms and is substitutional or nonsubstitutional.
摘要翻译:聚碳酸酯树脂具有由以下通式(I)表示的结构单元:A 1表示取代或非取代基的烷基和取代或非取代基的芳基。 A 2,A 3,A 4,A 5,A 6和 A 7分别表示氢原子,卤素原子,碳原子数为1〜6的烷基,为取代或非取代基中的一个。
摘要:
A belt seam treatment apparatus includes a support element with a smooth surface that supports the seam region of the belt and a heat and pressure source that heats a treatment strip and the belt seam region and that forces the treatment strip against the belt seam region. The support element can be a tube over which the belt hangs and can include a vacuum belt hold system that secures the seam region against the tube during treatment. The heat and pressure source can be a heated pressure bar engaging the entire seam region or a heated pressure wheel traversing the seam region of the entire belt width.
摘要:
A flexible imaging belt seam treatment article comprising a high-temperature-resistant flexible substrate that supports a thermoplastic polymer film. The film is deposited on the flexible substrate by dissolution of a film-forming thermoplastic polymer in a carrier solvent, applying the resulting solution to the flexible substrate, and eliminating the carrier solvent. The article can then be used to treat a seam of a flexible imaging belt by placing it on the seam, heating the strip and seam, and applying pressure to the strip and seam.