Ricoh Company, Ltd.

Sharp Kabushiki Kaisha Corporation

Other

Canon Kabushiki Kaisha

Fujitsu Corporation

Satoshi Ogawa

Tetsuya Yano

Junichi Awamura

Osamu Uchinokura

Tadashi Nakamura

Daisuke Ito

Daisuke Inoue

Yoshitaka Sekiguchi

Masaki Watanabe

Satoshi Kojima

Yoshiaki Akazawa

Tsuyoshi Sugimoto

Hitoshi Nagahama

Tsuneyasu Nagatomo

Toshihisa Ishida

Hiroshi Yamashita

Yoshihiro Mikuriya

Takahiro Honda

Kazuoki Fuwa

Hiroaki Katoh

Hideaki Yasunaga

Masayuki Hagi

Masahiko Kubo

Masana Shiba

Naohiro Watanabe

Masayuki Ishii

Atsushi Takahashi

Naohito Shimota

Masahide Inoue

Hiroshi Onda

Mitsuo Aoki

Hitoshi Iwatsuki

Mitsuru Naruse

Ryota Inoue

Fumihiro Sasaki

Shun Saito

Tatsuki Fukui

Takayuki Nakamura

Tomomi Suzuki

Masato Minami

Kiyoshi Toizumi

Junichi Saito

Tomohiro Fukao

Fumio Yamauchi

Kengo Kanazaki

Teruki Kusahara

Yasuharu Morinishi

Syouko Satoh

Tadayuki Sawai

Mamoru Hozumi

Yoshinori Urata

Kiwako Hirohara

Naoko Kitada

Masao Suzuki

Takeaki Ohuchi

Hyo Shu

Tatsuya Morita

Daisuke Sasaguri

Toshihiko Murakami

Masahiro Seki

Yoshinori Yamamoto

Ryuuta Yoshida

Kouji Kida

Shoko Sato

Tatuo Imafuku

Takeaki Ouchi

Tomoharu Miki

Shinichi Wakamatsu

Tohru Nishikawa

Shohta Kobayashi

Takahiro Bito

Nobuhiko Nakano

Tomoyuki Satoh

Shinsuke Sando

Tatsuo Imafuku

Sohichiroh Iida

Kinji Shinzo

Tomoko Toizumi

Yasuhiro Aoyama

Teruyuki Kondo

Hiroyuki Terada

Yoshinori Shimane

Akio Matsumoto

Yunsheng Sun

Hisatsugu Yamada

Yoshinori Hasegawa

Yu Kimura

Ryuta Yoshida

Takao Yoneda

Koshi Sato

Natsuki Matsumoto

Provided is a resin powder including a polyolefin-based resin, wherein a melting point of the resin powder is 150 degrees C. or higher, wherein a melt mass flow rate (MFR) of the resin powder measured according to JIS K 7210 is 0.35 (g/10 min) or greater but 8.50 (g/10 min) or less, and wherein a particle size distribution (volume average particle diameter Dv/number average particle diameter Dn) of the resin powder is 1.35 or less. In preferred embodiments, an average circularity of the resin powder is 0.975 or greater, and the polyolefin-based resin is a block copolymerized polypropylene resin.

Resin powder, resin powder for producing three-dimensional object, and three-dimensional object producing method

A fiber aggregation contains fiber containing a thermoplastic resin, each of the fiber being mutually joined and aligned.

Fiber aggregation, short fiber and method of manufacturing the same, and film and method of manufacturing the same

Provided is a toner including a binder resin, a release agent, and a charge-controlling agent, wherein the toner includes toner particles having particle diameters of 3 micrometers or smaller, among the toner particles having particle diameters of 3 micrometers or smaller, a proportion of the toner particles having an average circularity of 0.70 or greater but 0.85 or less in all of the toner particles is 10% by number or greater but less than 20% by number and a proportion of the toner particles having an average circularity of less than 0.70 in all of the toner particles is 10% by number or less.

Toner, image forming method, image forming apparatus, and process cartridge

Provided is a toner including a binder resin, and a charge-controlling agent, wherein a volume average particle diameter X of the toner after a stress treatment satisfies Formula (1), and an amount Y of fine toner particles having particle diameters of 3 micrometers or smaller and circularity of 0.70 or less satisfies Formula (2).

Toner, production method of toner, image forming method, image forming apparatus, and process cartridge

A toner including a binder resin, wherein the toner includes a tetrahydrofuran (THF)-insoluble component in a range of from 10% by mass through 40% by mass, wherein the toner has a main peak in a range of from 12,000 through 18,000 in a molecular weight distribution of a THF-soluble component as measured by gel permeation chromatography (GPC), wherein the main peak has a half value width in a range of from 20,000 to 50,000, and wherein the toner includes a component having a molecular weight of 2,000 or less in a range of from 10.0% by mass through 20.0% by mass and a component having a molecular weight of 100,000 or more of 8.0% by mass or less.

Toner, toner stored unit, and image forming apparatus

A toner including a non-crystalline polyester resin and a crystalline polyester resin, wherein a tetrahydrofuran soluble component of the non-crystalline polyester resin has a weight-average molecular weight of 3,000 to 8,000 measured by gel permeation chromatography, and wherein the toner has a glass transition temperature A before an extraction process of the toner with methanol and a glass transition temperature B after the extraction process of the toner with methanol, and a difference between A and B (B&#x2212;A) is 2.0&#xb0; C. or less.

Toner and developer

A toner set, including: a transparent toner including a binder resin a, a releasing agent a and no colorant; and one or more color toners, each including a binder resin b, a colorant b and a releasing agent b, wherein the binder resin a includes a non-crystalline resin &#x3b1; and a crystalline resin &#x3b1;, the binder resin b includes a non-crystalline resin &#x3b2; and a crystalline resin &#x3b2;, the releasing agent a has an average particle diameter as a long diameter of 0.2 &#x3bc;m to 2.0 &#x3bc;m, and there is a relationship of 1&#x3c;A/B&#x3c;1.5, where A is an area of the releasing agent a in a transparent toner cross-section from a surface thereof to a &#x2153;-depth of a volume-average particle diameter, and B is an area of the releasing agent b in a color-toner cross-section from a surface thereof to a &#x2153;-depth of a volume-average particle diameter.

Toner set, developer set, and image forming apparatus

A toner including a binder resin which contains a crystalline polyester resin and a non-crystalline polyester resin, wherein the crystalline polyester resin has at least two diffraction peaks in a range of 20&#xb0;&#x3c;2&#x3b8;&#x3c;25&#xb0; as detected by X-ray diffraction measurement, and has a melting point which is 60&#xb0; C. or higher but lower than 80&#xb0; C., and wherein the diffraction peaks each have a half width which is less than 1.0&#xb0;.

Toner containing crystalline polyester

A toner, including: a binder resin; releasing agent-encapsulating capsules; and a colorant, wherein the releasing agent-encapsulating capsules each include: a capsule formed of a resin (I) which is different from the binder resin; and a releasing agent (RA) which is encapsulated in the capsule, and the releasing agent-encapsulating capsules exist in the binder resin, and wherein 50% to 100% of the releasing agent-encapsulating capsules exist in a region from a surface of the toner to a depth of 0.10 times a volume-average particle diameter of the toner.

Toner, developer, process cartridge, and image forming apparatus

An image forming apparatus including: image bearing member; latent image forming unit; developing unit; transfer unit; fixing unit, wherein toner in the developing unit contains amorphous polymer, crystalline resin and releasing agent, when the toner is measured for G' at 40&#xb0; C. to 210&#xb0; C. with rheometer at 1 Hz and 1 deg, G&#x2032;(100) is &#x2266;20,000 and G&#x2032;(150) is &#x2267;500 Pa, and straight line drawn by connecting points of the G&#x2032;(100) and G&#x2032;(110) on curve of the G&#x2032; has gradient of &#x2266;0.035, the gradient being 'a' expressed by: a=|logG&#x2032;(100)&#x2212;logG&#x2032;(110)|/10, and the fixing unit includes: heating member containing flexible endless belt; heat source fixed within the flexible endless belt; and press member in contact with the belt to form nip portion, and the fixing unit is configured to heat/press the medium passing through the nip portion to fix the image on the medium.

Image forming apparatus

A toner including: toner base particles; and an external additive, the toner base particles each comprising a binder resin and a colorant, wherein the external additive comprises non-spherical particles and spherical particles, wherein the non-spherical particles are each a secondary particle in which spherical primary particles are coalesced together, and wherein the non-spherical particles and the spherical particles in the external additive satisfy a relationship expressed by the following formula (1):3(%)&#x3c;(%)&#x2003;&#x2003;Formula (1) where Ca is greater than 10% but smaller than 20% and Cb is greater than 40% but smaller than 70%, and Ca and Cb are values given by: 

Toner, two-component developer and image forming apparatus

A toner set, including: at least one chromatic toner containing a colorant; and a transparent toner containing no colorant, wherein the chromatic toner and the transparent toner each include a releasing agent and a binder resin, and wherein an amount of a tetrahydrofuran insoluble matter in the transparent toner is smaller than an amount of a tetrahydrofuran insoluble matter in the chromatic toner.

A toner for developing an electrostatic image, including: toner base particles each including a binder resin and a releasing agent; and inorganic fine particles, wherein the toner includes the inorganic fine particles as an external additive on a surface of the toner base particle, wherein the toner base particles have a BET specific surface area of 2.5 m/g to 5.0 m/g, and wherein the inorganic fine particles comprise inorganic fine particles (A) which are each a secondary particle where a plurality of primary particles are coalesced together.

Toner for developing electrostatic image, two-component developer and image forming apparatus

A method of manufacturing toner including melting, mixing, and kneading a releasing agent and a coloring agent with at least part of a polyester binder resin, and suspending and granulating an oil phase comprising the binder resin, the coloring agent, and the releasing agent in an aqueous medium.

Method of manufacturing toner and toner manufactured by the method

To provide a toner, which contains a binder resin, a colorant, and a releasing agent, wherein the binder resin contains a low molecular weight resin component, where the low molecular weight resin component has a resin softening coefficient (A), represented by the following formula (1), satisfying A&#x3e;0.165, and has storage elastic modulus (dyne/cm) G'(Tfb) satisfying G&#x2032;(Tfb)&#x2266;1&#xd7;10where Tfb is a flow onset temperature (&#xb0; C.) of the low molecular weight resin component as measured by a capillary rheometer:=|[(1)&#x2212;ln&#x2032;(2)]/(1&#x2212;2)|&#x2003;&#x2003;Formula (1)(where T1 is temperature (&#xb0; C.) at which storage elastic modulus G&#x2032;(r1) is 1&#xd7;10(dyne/cm) and T2 is temperature (&#xb0; C.) at which storage elastic modulus G&#x2032;(r2) is 1&#xd7;10(dyne/cm) as measured by means of a viscoelasticity measuring device with measuring frequency of 1 Hz, and measuring distortion of 1 deg; and | | represents an absolute value.).

Toner for electrostatic charge development

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Nara, Japan

Satoshi Ogawa