JP2007121441A5 - - Google Patents

Claims (12)

In an image heating apparatus having a rotatable heating member that heats an image on a recording material at a nip portion, and a heating unit that heats the heating member from the outside thereof,
The heating element inside the heat insulating elastic layer is formed, at least in the outermost layer is mixed thermal conductivity filler, the thermally conductive layer Ru high thermal conductivity der than the heat insulating elastic layer is formed, the heating The means has a configuration in which a flexible member is brought into contact with the heating member, and the flexible member is heated from the inside by a heating source to heat the heating member, and the flexible member is at least 1 W / mK or more. An image heating apparatus having a thermal conductivity of The front Symbol thermally conductive layer, the image heating apparatus according to claim 1, characterized in that heat conduction filler Ru a material formed with at least 10 W / mK or more thermal conductivity are mixed 10vol% ~50vol% . An apparatus according to claim 1 or 2 average particle diameter of the heat-conducting filler that will be mixed prior Symbol thermally conductive layer is equal to or is 3.5μm or less. Before SL thermally conductive layer, the image heating apparatus according to any one of claims 1 to 3 thermal conductivity, characterized in that at least 0.35 W / mK or more. Before SL thermally conductive layer, and a thermal conductivity of at least 0.35 W / mK or more, claims 1, characterized in that the thickness is formed in 20μm or 200μm or less image heating according to any one of 3 apparatus.   The image heating apparatus according to claim 1, wherein the heat insulating elastic layer has a thermal conductivity of 0.15 W / mK or less.   The heat insulating elastic layer is formed by baking and curing after forming a compound in which a hollow filler is blended with an organopolysiloxane composition, or a compound in which a water-absorbing polymer and water are blended in an organopolysiloxane composition. The image heating apparatus according to claim 1, wherein the image heating apparatus is an image heating apparatus.   8. The flexible member according to claim 1, wherein a heat capacity for one rotation in a rotation direction per 1 cm in a direction orthogonal to the recording material conveyance direction is 0.4 J / K or less. Image heating device.   The image heating apparatus according to claim 1, wherein the heating source is in contact with an inner surface of the flexible member, and the heating member side is held in a concave shape.   A pressure member that forms a nip for heating the image on the recording material between the pressure member and the pressure member is a pressure roller configured in a roller shape. The image heating apparatus according to claim 1, further comprising a heat insulating elastic layer having a thermal conductivity of 0.15 W / mK or less.   A pressurizing member that forms a nip that heats an image on a recording material with the heating member, and the pressurizing member has a thermal conductivity of 0.2 W / mK or less and is rotatable and flexible. 10. An elastic pressure member that includes an elastic pressure member and is pressurized with the heating member via the flexible member. The image heating apparatus described in 1.   The image heating apparatus according to claim 11, wherein the elastic pressure member is held in a concave shape on the heating member side.