Canon Kabushiki Kaisha

Ryo Ishifuji

Masaaki Takahashi

Hiroki Muramatsu

Yohei Miyauchi

Yasuharu Notoya

Naoko Kasai

Yusuke Baba

Yasuhiro Miyahara

Takuji Oishi

Tomoyo Miyakai

Noriaki Kobayashi

A fixing belt having an endless shape includes a base layer having an endless shape, an elastic layer on an outer peripheral surface of the base layer, and a surface layer on an outer peripheral surface of the elastic layer, the elastic layer containing a rubber and fillers dispersed in the rubber, the fillers containing heat conductive fillers, an entire thickness of the elastic layer is from 100 μm to 3,000 μm, a content ratio of the fillers with respect to the entirety of the elastic layer being 35% by volume or more, a content ratio of the fillers in a region A being less than 35% by volume with respect to the region A, and the entirety of the elastic layer having a thermal conductivity of 0.4 W/(m·K) or more in a thickness direction thereof.

Fixing belt and heat fixing device

Provided is a fixing rotating member capable of maintaining high toner releasability over longer periods of time than in conventional instances and that is capable of maintaining abrasion resistance against paper; the fixing rotating member comprises a base layer, an elastic layer, and a surface layer, in this order; the surface layer containing a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer and a perfluoropolyether; the tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer having pores formed therein; the surface layer has pores with openings at a first surface thereof, and constituting an outer surface of the fixing rotating member; at least part of the pores containing the perfluoropolyether; a content of the perfluoropolyether in the surface layer is 20 mass % to 60 mass %; and a degree of orientation A of molecules of the tetrafluoroethylene-perfluoroalkyl vinyl ether in a direction perpendicular to a circumferential direction of the surface layer is 35 to 75%.

Fixing rotating member, fixing apparatus and electrophotographic image forming apparatus, and method for producing fixing rotating member

A fixing rotating member comprising a base layer, an elastic layer and a surface layer, in this order, the surface layer containing PFA and PFPE, and having pores with openings at a first surface; at least part of the pores containing the PFPE, wherein when after removing the PFPE in the pores, placing a first observation region on the first surface, defining a ratio of a sum of areas of the openings in the first observation region relative to an area of the first observation region as P; and placing a second observation region in a cross section of the surface layer, and defining a ratio of a sum of areas of the pores in the second observation region relative to an area of the second observation region as P, P/Pis 1.3 or higher.

Fixing rotating member, fixing apparatus, electrophotographic image forming apparatus, and method for producing fixing rotating member

Provided is a pressurizing member including a substrate, an elastic layer on the substrate, and a surface layer on the elastic layer, the surface layer containing a fluorine resin, wherein the surface layer has a surface resistivity of 1&#xd7;10[&#x3a9;/&#x25a1;] or less at a temperature of 25&#xb0; C. when applying a DC voltage of 500 V, and a thermal conductivity &#x3bb; in a thickness direction of the surface layer is 0.093 [W/(m&#xb7;K)] or less.

Pressurizing member, fixing device, and electrophotographic image-forming apparatus

A pressing rotating member comprising a base layer, an elastic layer and a surface layer, in this order, the surface layer having pores, wherein when placing an observation region of 8 &#x3bc;m long&#xd7;11 &#x3bc;m wide at a cross section of the surface layer in a thickness direction of the surface layer&#x2014;a direction perpendicular to a circumferential direction of the pressing rotating member, a degree of orientation f of the pores observed in the observation region is 0.20 or higher, and an orientation angle &#x3a6; of the pores observed in the observation region is 0&#xb0; to 10&#xb0;.

Growing community of inventors

Ibaraki, Japan

Ryo Ishifuji