| 摘要 |
Provided is a developing roller that has reduced the thermal expansion of its elastic layer and hardly causes a plastic deformation even after abutting with an abutting member for a long time period. The developing roller includes: a mandrel; an elastic layer provided for the outer periphery of the mandrel, the elastic layer including an addition-curing silicone rubber; and a surface layer provided for the outer periphery of the elastic layer, in which: the elastic layer includes a compound represented by the following formula (1); when the content of such a compound that n in the following formula (1) represents an integer of 3 or more and 12 or less in the elastic layer is represented by P1, and the content of such a compound that n in the following formula (1) represents an integer of 13 or more and 20 or less in the elastic layer is represented by P2, P1+P2 is 5,000 ppm by mass or more and 12,000 ppm by mass or less; and P1 is 1,500 ppm by mass or more and 6,000 ppm by mass or less (In the formula (1), n represents an integer of 3 or more and 20 or less): |
