Patent ID: 8369763

Claim:
A roller used for an image heating apparatus, comprising: a metal core; an elastic layer containing a thermal conductive filler whose average length is not less than 0.05 mm and not more than 1 mm, wherein a thermal conductivity (λ f ) of the thermal conductive filler in the longitudinal direction of the thermal conductive filler is not less than 500 W/(m·k), wherein a dispersed amount of the thermal conductive filler dispersed in the elastic layer is not less than 5 vol % and not more than 40 vol %, wherein the thermal conductivity (λ y ) of the elastic layer in an axial direction of the roller is not less than 2.5 W/(m·k); and, a solid rubber layer provided between the metal core and the elastic layer, wherein a thermal conductivity (λ) of the solid rubber layer in a thickness direction of the solid rubber layer is not less than 0.16 W/(m·k) and not more than 0.40 W/(m·k).