| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a conductive rubber composition allowing formation of a transfer roller that has a porous structure responding to demands for reduction in cost, weight, or the like and having excellent flexibility, and has a small foam cell diameter suitable for forming a color image, and to provide a transfer roller formed from the conductive rubber composition, and an image forming apparatus in which the transfer roller is assembled.SOLUTION: A conductive rubber composition is prepared by compounding 4 to 12 parts by mass of a foaming agent, together with a crosslinking component, into total 100 part by mass of a rubber component comprising SBR, EPDM, and epichlorohydrin rubber, and compounding a foaming assistant by 70 to 150 mass% of the amount of the foaming agent. A transfer roller 1 is manufactured by extrusion-molding the above conductive rubber composition into a cylindrical body, and pressurizing and heating the cylindrical body by pressurized steam to foam and to crosslink in a vulcanizer. The transfer roller is assembled in an image forming apparatus.</p> |
