Ricoh Company, Ltd.

Fujifilm Business Innovation Corp.

Fuji Xerox Co., Ltd.

Sony Corporation

Sokkia Company Limited

Koji Sasaki

Atsushi Sakagami

Naoto Sakurai

Daiya Miyasaka

Tomoko Nishizawa

Yuka Zenitani

Sakae Takeuchi

Yoshifumi Eri

Yohei Ono

Yasuhiko Tsugawa

Mai Mochida

Takahiro Mizuguchi

Atsushi Sugawara

Yukiaki Nakamura

Yoshikazu Anezaki

Tetsuya Taguchi

Yutaka Saito

Yoshifumi Iida

Hiroyoshi Okuno

Masanobu Ninomiya

Hidetoshi Watanabe

Shunsuke Nozaki

Masashi Ikeda

Satoshi Kamiwaki

Yasuaki Hashimoto

Masahiro Takayama

Shimpei Takagi

Satoshi Inoue

Akira Matsumoto

Tamotsu Yamagami

Tetsu Watanabe

Yosuke Tsurumi

Hironobu Narui

Yusuke Ikeda

Sakon Takahashi

Satoshi Miura

Tsuyoshi Murakami

Katsunori Yanashima

Yoshio Aoki

Yutaka Nakamura

Kiyohiro Yamanaka

Kana Yoshida

Emi Takahashi

Hirotsugu Suzuki

Tsutomu Furuta

Akihiko Memezawa

Takashi Kishi

Hayami Kikawa

Futoshi Osada

Akihiro Aoki

Kietsu Iwabuchi

Tomoko Saeki

Tsuyoshi Hoshino

Toshihiro Uchimura

An electrostatic charge image developing toner has toner particles and silica particles that are added to an exterior of the toner particles, contain a nitrogen element-containing compound, have a ratio C/D of 0.10 or more and 0.75 or less where C represents an integral value of signals observed in a range of chemical shift of −50 ppm or more and −75 ppm or less in aSi solid-state nuclear magnetic resonance (NMR) spectrum obtained by a cross-polarization/magic angle spinning (CP/MAS) method and D represents an integral value of signals observed in a range of chemical shift of −90 ppm or more and −120 ppm or less in the same spectrum, have an extraction amount X of the nitrogen element-containing compound by a mixed solution of ammonia/methanol of 0.1% by mass or more, and satisfy Expression: Y/X<0.3 where X represents an extraction amount of the nitrogen element-containing compound by a mixed solution of ammonia/methanol and Y represents an extraction amount of the nitrogen element-containing compound by water.

Electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method

Silica particles includes a nitrogen-containing compound. The ratio of the integral C of a signal observed at a chemical shift of −50 ppm or more and −75 ppm or less in aSi solid-state nuclei magnetic resonance (NMR) spectrum of the silica particles, theSi solid-state NMR spectrum being obtained by cross polarization/magic angle spinning (CP/MAS), to the integral D of a signal observed at a chemical shift of −90 ppm or more and −120 ppm or less in theSi solid-state NMR spectrum, that is, C/D, is 0.10 or more and 0.75 or less. The amount X of the nitrogen-containing compound extracted from the silica particles with a mixed solution of ammonia and methanol is 0.1% by mass or more. The amount X of the nitrogen-containing compound extracted and the amount Y of the nitrogen-containing compound extracted from the silica particles with water satisfy Y/X<0.3.

Silica particles and method for producing the same

A silica particle includes: a quaternary ammonium salt, in which the following expressions are satisfied, 0.90≤F/F≤1.10, and 5≤F/F≤20, in which Frepresents a maximum frequency value of a pore diameter of 2 nm or less in the silica particles before washing, which is obtained from a pore distribution curve in a nitrogen gas adsorption method, Frepresents a maximum frequency value of the pore diameter of 2 nm or less in the silica particles after washing, which is obtained from the pore distribution curve in the nitrogen gas adsorption method, and Frepresents a maximum frequency value of the pore diameter of 2 nm or less in the silica particles before washing and after sintering at 600° C., which is obtained from the pore distribution curve in the nitrogen gas adsorption method.

Silica particle and method for producing the same

An electrostatic charge image developing toner contains toner particles and silica particles that are added to an exterior of the toner particles and contain a nitrogen element-containing compound containing a molybdenum element, in which in the silica particles, a ratio (Mo/Si) of Net intensity of the molybdenum element to Net intensity of a silicon element measured by X-ray fluorescence analysis is 0.035 or more and 0.35 or less.

Silica particles contain a nitrogen element-containing compound containing a molybdenum element, in which a ratio (Mo/Si) of Net intensity of the molybdenum element to Net intensity of a silicon element measured by X-ray fluorescence analysis is 0.035 or more and 0.35 or less.

Silica particles comprising nitrogen element-containing compound containing molybdenum element

A disclosed managing apparatus and image forming apparatus management system ensure confidentiality of information in an image forming apparatus while usability is maintained. An image forming apparatus acquires IC card identifying information with an IC card reader. A management server acquires a user ID associated with the acquired IC card identifying information and use limit information concerning use of the image forming apparatus. A process is performed in the image forming apparatus in accordance with the use limit information.

Image forming apparatus management system, image forming apparatus, managing apparatus, terminal apparatus, image forming apparatus managing method, and image forming program

Silica particles have silica base particles, a structure that covers at least a part of a surface of the silica base particles and is configured with a reaction product of a trifunctional silane coupling agent, and a nitrogen element-containing compound, in which a content of the nitrogen element-containing compound with respect to the silica particles is 0.005% by mass or more and 0.50% by mass or less in terms of N atoms, and the silica particles have a degree of hydrophobicity of 10% or more and 60% or less and a volume resistivity of 1×10Ω·cm or more and 1×10Ω·cm or less.

Silica particles and manufacturing method thereof

Silica particles include a nitrogen-containing compound. When the volumes of pores having a diameter of 1 nm or more and 50 nm or less, the volumes being determined from a pore size distribution curve of the silica particles before and after the silica particles are baked at 350° C., the pore size distribution curve being obtained by nitrogen gas adsorption, are defined as A and B, respectively, B/A is 1.2 or more and 5 or less and B is 0.2 cm/g or more and 3 cm/g or less.

Resin particles include resin base particles and silica particles on surfaces of the resin base particles. The silica particles contain a quaternary ammonium salt and have hydrophobized surfaces. A difference (detection temperature A&#x2212;detection temperature B) between a detection temperature A and a detection temperature B is more than 50&#xb0; C., where the detection temperature A is a detection temperature from a pyrolysis product of the quaternary ammonium salt determined by pyrolysis mass spectrometry of the resin particles before cleaning, and the detection temperature B is a detection temperature from the pyrolysis product of the quaternary ammonium salt determined by pyrolysis mass spectrometry of the resin particles after cleaning.

Resin particles and method for manufacturing resin particles

A method for producing a silica composite particle including a silica particle and at least one compound in which an aluminum atom bonds to an organic group through oxygen. The method includes: (i) providing a silica particle dispersion liquid having a silica particle content of about 20 mass % or more; (ii) mixing and reacting a compound represented by formula (S1) and the silica particle dispersion liquid to obtain a slurry; (iii) providing the at least one compound; and (iv) then mixing and reacting the slurry with the at least one compound to form the silica composite particle.

Method for producing silica composite particle

An organic substance-attached porous inorganic oxide particle including porous inorganic oxide particle and an organic substance attached to the surface of the porous inorganic oxide particle. The organic substance-attached porous inorganic oxide particle satisfies a formula below()/2&#x3e;1where Cf represents the amount of carbon (atom %) measured by subjecting the surface of the particle to X-ray photoelectron spectroscopy (XPS) after the particle is washed, and Ce represents the amount of carbon (atom %) measured by subjecting the surface of the particle to X-ray photoelectron spectroscopy (XPS) after two-minute surface etching of the particle.

Organic substance-attached porous inorganic oxide particle

A management apparatus connected to an image forming apparatus for managing usage of the image forming apparatus is disclosed. The management apparatus includes a user data storage part for storing user identification data and use restriction data corresponding to the user identification data, and a use restriction data acquiring part for acquiring the use restriction data corresponding to the user identification data.

Management apparatus, image forming apparatus management system for managing usage of the image forming apparatus

Growing community of inventors

Kanagawa, Japan

Koji Sasaki