| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a conductive rubber roller having more improved uniformity in terms of the aspect ratio of the inside/outside diameter of a tube constituting a foam rubber layer and the cell diameter distribution, thereby, capable of suppressing uneven hardness and uneven resistance, and to provide the roller used for an electrophotographic device, having the improved characteristics. SOLUTION: The method for manufacturing the conductive rubber roller having the foam rubber layer on a conductive core material includes a vulcanization step of heating and vulcanizing foam rubber layer forming material containing at least one of epichlorohydrin rubber and acrylonitrile butadiene rubber, and p,p'-oxybis benzene sulfonyl hydrazide with microwave irradiation and heated air by means of a microwave vulcanizing furnace. The time required for the material to pass through the furnace is≥0.5 and≤2.0 minutes, and the material is heated up so that the temperature of the material may become 100 to 250°C at the ejection from the furnace, and the generated gas during this period is 2.0 to 20.0 ml/g. COPYRIGHT: (C)2008,JPO&INPIT |
