| 摘要 |
Provided is a developing roller which has improved printing quality, in particular improved quality of fine line printing at the single dot level by assuring high resistance and high surface potential in the surface layer. An elastic roller which is sequentially provided with an elastic layer (2), an intermediate layer (3) and a surface layer (4) on the outer circumference of a shaft (1). The surface layer (4) contains a urethane (meth)acrylate oligomer that is obtained by causing a polybutadiene polyol or a hydrogenated polybutadiene polyol, a polyisocyanate, and a (meth)acrylate having a hydroxy group to react with each other. |
