| 摘要 |
<p>PURPOSE:To provide a small-sized/light-weight device capable of suppressing the fluctuation in electric characteristics of a one-component developing roller due to water absorption can be suppressed and obtaining stable image even when the use environment changes, by using low hygroscopic material for a dielectric layer of the roller. CONSTITUTION:A one-component developing roller has a dielectric layer 12 formed on the outer surface of a conductive supporting body 11. The dielectic layer 12 consists of a low hygroscopic elastomer or polymer. As for the elastomer or polymer, single copolymers of polyethylene, polypropylene, or ethylene, or blended material thereof can be used. Moreover, manganese-aluminum magnet, strontium ferrite or barium ferrite, or mixture thereof can be mixed and dispersed therein.</p> |
