Canon Kabushiki Kaisha

Matsushita Electric Industrial Co., Ltd.

Yusuke Baba

Takeshi Suzuki

Masaaki Takahashi

Yohei Miyauchi

Hiroki Muramatsu

Yasuharu Notoya

Akeshi Asaka

Kaoru Okamoto

Shuichi Tetsuno

Kazuo Kishino

Toshio Tanaka

Katsuhisa Matsunaka

Naoko Kasai

Ryo Ishifuji

Masayuki Onuma

Masahiro Takenaga

Yasuhiro Miyahara

Haruki Mori

Masahide Onishi

Matsutaka Maeda

Masahito Omata

Atsushi Hori

Takuji Oishi

Mamo Matsumoto

Hiromitsu Noda

Shoji Umehara

Shozoh Shiraga

Yasunori Tomino

Noritaka Inoue

Shota Inoue

Akane Kuboyama

An electrophotographic member comprising: a base material; an elastic layer on the base material; and a surface layer on the elastic layer, wherein the elastic layer comprises silicone rubber, the surface layer comprises fluoro rubber, a thickness of the surface layer is 3 μm or more, an elastic deformation power ηIT calculated from a load displacement curve, obtained with a nanoindentation test according to ISO 14577 by bringing a Vickers indenter into contact with an outer surface of the surface layer and setting a test load at 120 μN, is 30 to 50%, and a Martens hardness determined by the nanoindentation test at the outer surface of the surface layer is 12.0 to 18.0 N/mm.

Electrophotographic member and electrophotographic image forming apparatus

An electrophotographic member includes a base layer and an elastic layer on the base layer, wherein the elastic layer includes a matrix rubber, an ionic liquid including an anion and a cation, and an inorganic layered double hydroxide compound, wherein the anion is at least one selected from the group consisting of structural formulae (1) to (3), the cation is at least one selected from the group consisting of structural formulae (4) to (7), and the inorganic layered double hydroxide compound has an average value of interlayer distances of 4 Å or larger and 8 Å or smaller, which are measured by XRD.

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

An electrophotographic member includes a base layer, an elastic layer, and a surface layer stacked in this order. The surface layer contains a fluorine resin and a fluorine rubber, the fluorine rubber is contained at a proportion of 0.5 parts by mass or more and 1.0 parts by mass or less with respect to 1 part by mass of the fluorine resin, and the surface layer further contains a compound represented by formula (1):CH(CH)—O—((CH)O)—OH  (1)In formula (1), m, l, and n each independently represent an integer of 1 or more.

Electrophotographic member and electrophotographic image-forming apparatus

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;.

Pressing rotating member and production method thereof, fixing apparatus, and electrophotographic image forming apparatus

A method for manufacturing a fixing member having a substrate, an elastic layer on the substrate, and a release layer on the elastic layer, having a thickness of 15 &#x3bc;m or more and 25 &#x3bc;m or less, and containing a fluororesin includes (1) providing a coating solution, containing: the fluororesin having a melt flow rate (MFR) of 1 g/10 min or more and 3 g/10 min or less, and an acrylic resin;

Fixing member, method for manufacturing fixing member, and image forming apparatus

A rotatable fixing member includes an elastic layer, a primer layer provided on the elastic layer, and a parting layer provided on the primer layer. The primer layer contains a crystalline fluorocarbon polymer having a functional group and has a thickness of 850 nm or less. The parting layer is a coating layer of a crystalline fluorocarbon polymer.

Rotatable fixing member, manufacturing method thereof and fixing device

Provided are an electrophotographic member having excellent durability and an electrophotographic image forming apparatus. The electrophotographic member includes: an elastic layer including a silicone rubber; an intermediate layer including at least one of an aromatic polyimide and an aromatic polyamideimide, and a fluororesin; and a surface layer including a fluororesin, in which the aromatic polyimide or the aromatic polyamideimide is bonded to the silicone rubber through an amide bond-containing group, and in which a carbon atom constituting the amide bond is directly bonded to a carbon atom constituting an aromatic ring in a molecule of the aromatic polyimide or aromatic polyamideimide.

Electrophotographic member, fixing device, and electrophotographic image forming apparatus

An electrophotographic endless metallic belt is provided with improved crack resistance to repeated bending and rubbing against a control member coming into contact therewith, thereby improving its durability. Each edge face of the metallic belt is so shaped as to have a ridge between an outer-surface edge and an inner-surface edge of the metallic belt. As a result, internal stress in the part of the belt that contacts the control member, as a result of contact therewith, is reduced.

Endless metallic belt, electrophotographic endless belt, fixing assembly, and electrophotographic image forming apparatus

A rotational angle detector has a rotary body, a first detecting unit rotating in cooperation with the rotary body, a second detecting unit rotating in cooperation with the first detecting unit, and an auxiliary detecting unit rotating in cooperation with the rotary body and the second detecting unit. The rotational angle detector has a first detecting element, a second detecting element, and a controller. The first detecting element detects rotation of the first detecting unit, and the second detecting element detects rotation of the second detecting unit. The controller detects a rotational angle of the rotary body based on a detection signal supplied from the first detecting element and a detection signal supplied from the second detecting element.

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Yokohama, Japan

Yusuke Baba