Patent ID: 8357729
Filing Date: 2013-01-22
Classification: C08G,C08J,C08L,G03G,H01B

Abstract:
1. A method of manufacturing a conductive toner supply roller, the method comprising: preparing a polyurethane foam; impregnating the polyurethane foam with an impregnation solution including an electroconductive polymer, a binder resin, an electroconductive agent, and a solvent, and without a charge controlling agent, and drying the resulting polyurethane foam; cutting the dried polyurethane foam, and inserting a shaft into the cut polyurethane foam; and polishing an outer surface of the resulting polyurethane foam, wherein the electroconductive polymer of the impregnation solution is added in an amount in the range of approximately 0.3 phr to approximately 10 phr based on an amount of the impregnation solution, the electroconductive agent is a compound selected from a group consisting of conductive carbon blacks, oxidation-treated carbon ink, thermal carbon, natural graphite, artificial graphite, and conductive metallic oxides and metals, and the electroconductive polymer of the impregnation solution includes at least a polythiophene and, where selected, further includes at least one of electroconductive polymers selected from a group consisting of poly (p-phenylene), poly (ethylenedioxythiophene), polypyrrole, poly (p-phenylenevinylene), poly (thienylvinylene), polyaniline, polyisothianaphthen and poly (p-phenylenesulfide).