| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a conductive rubber roller, such as a transfer roller and an electrification roller, having less foaming irregularities and less inner diameter dispersion. <P>SOLUTION: This method for manufacturing the conductive rubber roller, in which at least a foamed rubber layer is formed on a conductive core material, comprises a step of extrusion-molding a rubber composition to be a material of the rubber layer into a cylindrical shape and a step of vulcanization-foaming. The rubber composition contains a mixture of acrylonitrile butadiene rubber and epichlorohydrin rubber as a main rubber component, and has Mooney viscosity (ML1+4 100°C) of 15-40 degrees at 100°C. In the extrusion molding step, the rubber composition is extruded so that the inner diameter of the extruded cylindrical shape rubber molding becomes 1.0-2.5 when the nipple diameter of the extruder is defined as 1. <P>COPYRIGHT: (C)2010,JPO&INPIT |
