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AssigneeXerox Corporation
InventorsJohn S. Chambers, Huoy-Jen Yuh, Michael Sanchez, Harold F. Hammond, Helen R. Cherniack, Robert C. U. Yu, John S. Facci, Rachael McGrath
Estimating the term…
A charge transport layer material for a photoreceptor includes at least a polycarbonate polymer, at least one charge transport material, polytetrafluoroethylene particle aggregates having an average size of less than about 1.5 microns, hydrophobic silica and a fluorine-containing polymeric surfactant dispersed in a solvent. The presence of the hydrophobic silica enables the dispersion to have superior stability by preventing settling of the PTFE particles. A resulting charge transport layer produced from the dispersion exhibits excellent wear resistance against contact with an AC bias charging roll, excellent electrical performance, and delivers superior print quality.
A process of stabilizing a charge transport layer material dispersion containing polytetrafluoroethylene particles, comprising adding an amount of hydrophobic silica to a mixture of at least a polycarbonate polymer binder, at least one charge transport material, polytetrafluoroethylene particles, at least one fluorine-containing polymeric surfactant and at least one solvent to form a composition, and mixing the composition under high shear conditions to form the stabilized dispersion, wherein the polytetrafluoroethylene particles form polytetrafluoroethylene particle aggregates, uniformly dispersed throughout the material, having an average size of less than about 1.5 microns, during the mixing.
A charge transport layer material for a photoreceptor comprising at least a polycarbonate polymer binder having a number average molecular weight of not less than 35,000, at least one charge transport material, polytetrafluoroethylene particle aggregates having an average size of less than about 1.5 microns, hydrophobic silica and a fluorine-containing polymeric surfactant dispersed in a solvent mixture comprised of at least tetrahydrofuran and toluene.
An image forming device comprising at least a photoreceptor and an AC bias charging roll which contacts and charges the photoreceptor, wherein the photoreceptor comprises
Dependencies are inferred from the claim text.