Canon Kabushiki Kaisha

Other

Kimihiro Yoshimura

Yosuke Morikawa

Yohei Miyauchi

Kouichi Nakata

Daisuke Tanaka

Tatsuya Ikezue

Tetsuya Yano

Harunobu Ogaki

Atsushi Okuda

Hiroki Uematsu

Fumio Yamauchi

Yasuharu Notoya

Koichi Sato

Kenji Onuma

Yasushi Shimizu

Takashige Kasuya

Katsuhisa Yamazaki

Wataru Kitamura

Hidetoshi Tsuzuki

Kazuhiro Yamada

Yuki Yamamoto

Kazuhiro Yamauchi

Yuichi Hashimoto

Yoshinori Tomida

Tsuyoshi Takiguchi

Takashi Sakamoto

Manabu Komatsu

Hiroshi Saito

Kazuya Miyazaki

Hiroyuki Hashimoto

Toshihiro Kikuchi

Atsushi Ochi

Hirokatsu Miyata

Keiko Yamagishi

Katsuaki Kuge

Naoto Kameyama

Akira Watanabe

Masahiro Shirakawa

Yasuhiro Aoyama

Rieko Sakamoto

Kaori Hiratsuka

Kazuhisa Shirayama

Shinsuke Sando

Tetsuya Matsuda

Teruyuki Kondo

Hidehito Tochio

Maho Hori

Hiroshi Tsujita

Shingo Matsuki

Yohei Murayama

Shuji Ishii

Maho Tanaka

Naotake Sato

Hiroki Miura

Zainul Abedin Siddique

Michiko Narazaki

Hidetoshi Hirano

Mai Murakami

Takenori Sueoka

Akio Ojida

Nobuo Kosaka

Hiroshi Tominaga

Shigeki Takishita

Itaru Hamachi

Keiji Karube

Harumi Sako

Masaaki Inoue

Hideaki Tamai

Provided is a fixing member for electrophotography having excellent toner releasability even when used for a long time period. The fixing member includes a base layer, an elastic layer, and a surface layer in the stated order. The surface layer contains a fluorine resin and a fluorine oil having a perfluoropolyether structure. The mass Pof an adhered substance including the fluorine oil, adhered in the unit area of the detection surface of a QCM sensor when a measurement sample collected from the surface layer is subjected to a predetermined treatment (i), is 1.0&#xd7;10ng or more and 1.0&#xd7;10ng or less, and the mass Pof an adhered substance including the fluorine oil, adhered in the unit area of the detection surface of the QCM sensor when the sample is subjected to a predetermined treatment (ii), is 0.5&#xd7;Por more and 1.2&#xd7;Por less.

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

Provided is a fixing member including a base layer, and a surface layer on an outer surface of the base layer directly or with a primer layer interposed between the base layer and the surface layer, in which the surface layer is constituted by a single layer, the surface layer contains a fluororesin, and fluorine oil having a perfluoropolyether structure, and as for a measurement sample taken from the surface layer, when subjecting to predetermined treatments (i) and (ii), masses of an adhered material adhered in a unit area of a detection surface of a QCM sensor and containing the fluorine oil are within specific ranges.

Fixing member, fixing device, and electrophotographic image forming apparatus

Provided is a fixing member in which hot offset of a toner is difficult to be generated. The fixing member has a substrate and a release layer as a surface layer, wherein the release layer includes PFPE and a second fluororesin, the second fluororesin being at least one selected from PFA and FEP, and in aF-NMR spectrum of the release layer measured at a temperature of 200&#xb0; C., a relaxation time Tof longitudinal relaxation of a peak derived from PFPE is 0.5 seconds or more and 3.5 seconds or less.

Provided is a fixing member having an outer surface including excellent toner releasability and excellent scratch resistance, wherein the fixing member has a base material, an elastic layer, and a release layer in this order, the release layer including a tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer, and has a loss tangent at a frequency of 10 Hz and 180&#xb0; C. of 5.0&#xd7;10or more and 3.0&#xd7;10or less.

An intermediate transfer member for electrophotography comprising a substrate and a surface layer provided on the substrate. The surface layer comprises a binder resin and a perfluoropolyether. An extraction amount of the perfluoropolyether per 10 mmof the surface layer, is 0.10 mg to 5.00 mg, the extraction amount of the perfluoropolyether obtained by immersing the intermediate transfer member into a solvent that can dissolve the perfluoropolyether at 25&#xb0; C. for 24 hours. A surface of the intermediate transfer member that is not subjected to first and second treatments, has a n-hexadecane contact angle of 55&#xb0; or more. A surface of the intermediate transfer member that has been subjected to the first treatment, has a n-hexadecane contact angle of 40&#xb0; or less. A surface of the intermediate transfer member that has been subjected to the second treatment, has a n-hexadecane contact angle of 50&#xb0; or more.

Intermediate transfer member for electrophotography and electrophotographic apparatus

An electrophotographic photosensitive member includes a surface layer with a hexagonal boron nitride dispersed therein. The hexagonal boron nitride has a graphitization index (GI) of at least 3.0 and less than 15.0.

Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

The present invention relates to an electrophotographic intermediate transfer member that, even if an image is repeatedly and continuously transferred, can retain its transfer performance and can obtain an excellent image for a long time. The electrophotographic intermediate transfer member has a base layer and a surface layer, the surface layer has a matrix-domain structure in the cross section in the thickness direction, the matrix is formed of a binder resin, the domains contains a perfluoropolyether, and a microhardness of a surface of the electrophotographic intermediate transfer member measured by an ultramicro-hardness meter is 50 MPa or more.

Electrophotographic intermediate transfer member and electrophotographic apparatus

Provided are a method of producing an electrophotographic photosensitive member, particularly, a method of producing an electrophotographic photosensitive member and an organic device by which, in a method of forming a charge transporting layer, the stability of an application liquid for the layer after long-term storage is improved while the usage of an organic solvent in the application liquid is curtailed, and the layer having high uniformity is formed. The method is a method of producing an electrophotographic photosensitive member which includes a support and a charge transporting layer formed thereon, the method including: preparing a solution including: a first liquid whose solubility in water under 25&#xb0; C. and 1 atmosphere is 1.0 mass % or less; a second liquid whose solubility in water under 25&#xb0; C. and 1 atmosphere is 5.0 mass % or more; a charge transporting substance; and a binder resin; preparing an emulsion by dispersing the solution in water; forming a coat for the layer on the support by using the emulsion; and forming the layer by heating of the coat.

Method of producing electrophotographic photosensitive member, method of producing organic device, and emulsion for charge transporting layer

The invention has a process of preparing a dispersion liquid by dispersing particles containing a charge transporting substance and a binder resin in liquid medium containing a specific liquid to prepare a dispersion liquid and a process of forming a coat of the dispersion liquid, and heating and drying the coat to dissolve the particles containing the charge transporting substance and the binder resin with liquid medium to form a charge transporting layer.

Method of producing electrophotographic photosensitive member

In a process for producing an electrophotographic photosensitive member, in particular, a process of forming a charge transporting layer, a production process is provided by which the stability of a charge transporting layer coating fluid even after its storage for a long time is improved so as to form a coat for a charge transporting layer having a high uniformity. In a process for producing an electrophotographic photosensitive member having a charge transporting layer on a support, a production process is used in which a coat of (i) a liquid dispersion comprised of particles containing a charge transporting material, particles containing a binder resin, and an aqueous dispersion medium, or (ii) a liquid dispersion comprised of particles containing both a charge transporting material and a binder resin, and an aqueous dispersion medium, is formed on the support and then the coat is heated at a temperature not less than the melting point of the charge transporting material to form the charge transporting layer.

Process for producing electrophotographic photosensitive member

A method for producing an electrophotographic photosensitive member has a charge transporting layer, including preparing a first solution containing a specified first liquid, a charge transporting substance and a binder resin, preparing a second solution containing a specified second liquid and water, preparing an emulsion from the first and second solutions, forming the emulsion coating, and heating the coat to form the charge transporting layer, and a method for producing an organic device has a charge transporting layer, including preparing a first solution containing a specified first liquid and a charge transporting substance, preparing a second solution containing a specified second liquid and water, preparing an emulsion from the first and second solutions, forming the emulsion coating, and heating the coat to form the charge transporting layer are used.

Methods for producing electrophotographic photosensitive member and organic device each having charge transporting layer

A member for electrophotography having a multilayer structure or a single-layer structure, including an outermost layer which satisfies the following A, B and C:

Member for electrophotography, process cartridge, and electrophotographic apparatus

There are provided an electrophotographic photosensitive member and an intermediate transfer member each having good lubricity and good cleaning property on its surface, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member, and an electrophotographic apparatus including the intermediate transfer member. Therefore, a surface layer of the electrophotographic photosensitive member or intermediate transfer member of the present invention contains a matrix component and a rotatably-retained spherical particle that is not bound with the matrix component and is rotatably retained in a pore in the matrix component.

Electrophotographic photosensitive member, intermediate transfer member, process cartridge, and electrophotographic apparatus

A core of a cyclic structure represented by (&#x2014;N&#x2014;(CH)&#x2014;)is bonded to a dendrimer-type side chain with a specific branched structure at all nitrogen atoms in the core to produce a compound with a specific structure for producing a metal complex that exhibits a T1-reducing effect, and the resulting compound is coordinated to a metal ion that has a T1-reducing effect to obtain a metal complex that exhibits an excellent T1-reducing effect which is useful as an effective component of an MRI contrast agent and an MRI contrast agent using the same.

Aza metal complexes

The present invention relates to an electrophotographic photosensitive member including a support and a photosensitive layer formed on the support. The electrophotographic photosensitive member has a surface layer containing a polyarylate resin and acicular inorganic fillers. The acicular inorganic fillers are basic and have a number-average aspect ratio of 5 to 50 and a Mohs hardness of 2 to 6.

Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

Growing community of inventors

Yokohama, Japan

Kimihiro Yoshimura