摘要:
Disclosed is a method of manufacturing a charging roller useable in an electrophotographic image forming apparatus and a charging roller manufactured according to the method. The method includes introducing a conductive agent and a mixture of a rubber-based material and polyolefin-based resin into an extruder, extruding the conductive agent and the mixture to obtain an extrudate, crosslinking the extrudate by electron beam irradiation, and polishing the crosslinked extrudate. The method results in an environmentally friendly and simplified manufacturing processes, and/or in the reduction of the manufacturing costs.
摘要:
A toner supply roller of an electrophotographic imaging apparatus and a method of preparing the toner supply roller are provided. The toner supply roller includes a polyurethane foam, and a metal shaft inserted in the polyurethane foam along an axis thereof, wherein the polyurethane foam includes an ion-conductive agent and a binder, and the binder includes a resin having an amide bond. Accordingly, the toner supply roller including polyurethane foam provides an improved toner supply and prevents image defects.
摘要:
A conductive toner supply roller and a method of manufacturing the supply roller. The method includes 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 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. The resulting conductive toner supply roller has a low or medium resistance, and may be user in an electrostatic recording apparatus such as a printer, a facsimile machine, a copier or the like.
摘要:
The disclosure provides a developing roller for an electrophotographic image forming apparatus, and a method of manufacturing the same. The developing roller includes a shaft member and a resilient member provided on the shaft member. The resilient member includes a conductive resilient layer in contact with the shaft member and a conductive resin layer defining the outer surface of the resilient member. The conductive resin layer includes a resin and a surface-treated metal oxide. The developing roller is capable of an increased amount of toner charging while stably maintaining optical density.
摘要:
A multicolor image forming apparatus which includes a developer image forming unit to form an image using a developer and a transferring unit to transfer the formed developer image to a recording medium, wherein the developer comprises a plurality of dark developers and one or more light developers, wherein the dark developers and the light developers each include a binder resin having a weight average molecular weight from about 50,000 Mw to about 160,000 Mw, and wherein about 50,000 Mw to about 160,000 Mw of the weight average molecular weight of the binder resin of the dark developer is larger than about 50,000 Mw to about 160,000 Mw of the weight average molecular weight of the binder resin of the light developer.