| 摘要 |
PROBLEM TO BE SOLVED: To make a semiconductive roll to be equipped with both of stable friction electrification and development characteristics by laminating an elastic semiconductor layer composed of an electronic conductive silicone rubber and a semi-conductive bleeding prevention layer formed from an electronic conductive fluororesin in sequence on an outer periphery surface of a conductive shaft body. SOLUTION: A first roll consists of a conductive shaft body 1, a solid elastic semiconductor layer 2a made of an electronic conductive silicone rubber formed on an outer periphery surface of the conductive shaft body 1, and a half conductive bleeding prevention layer 3 made of an electronic conductive fluorine resin formed on the elastic conductor layer 2a (a). A second roll comprises the conductive shaft body 1, a spongiose elastic conductor layer 2b made of the electronic conductive silicone rubber formed on the outer periphery surface of the conductive shaft body 1, and the semi-conductive bleeding prevention layer 3 made of the electronic conductive fluororesin formed on the elastic conductor layer 2b (b). In this case, the volume resistivity values of the elastic semiconductor layers 2a, 2b are made in the range of 10<1> -10<9>Ω.cm, and the half conductive bleeding prevention layer 3 utilizes an electronic conductive filler with average grain diameter of 1-10μm. |
