| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller, which ensures a required nip property and a required mold-release property, and in which wave-like wrinkles are not appeared in a surface layer even if there is a difference in circumferential speed between the roller and an opposed object such as a photoreceptor drum or the like. SOLUTION: A base material layer made of low hardness rubber material is disposed on an outer periphery of a metal core metal, and a surface layer made of resin material is disposed on the base material layer. Between the base material layer and surface layer, a stress relief layer made of material having at least higher hardness than that of the base material layer and larger in elongation than that of the surface layer is provided. The stress relief layer is made of self-crosslinking resin added rubber material, the thickness thereof is 5-50μm, and the stress thereof is 5 MPa or more at a time of a 10% extension thereof. |
