Ricoh Company, Ltd.

Tomy Company, Ltd.

Mayekawa Mfg. Co., Ltd.

Hisashi Nakajima

Shinya Nakayama

Koichi Sakata

Yasuo Asahina

Satoshi Mochizuki

Tomoyuki Ichikawa

Hideki Sugiura

Akihiro Kotsugai

Yasuaki Iwamoto

Osamu Uchinokura

Kazumi Suzuki

Masashi Nagayama

Hitoshi Iwatsuki

Fumihiro Sasaki

Masayuki Ishii

Masami Tomita

Minoru Masuda

Mitsuo Aoki

Kimitoshi Yamaguchi

Hiroshi Yamada

Yoshitaka Sekiguchi

Hiroto Higuchi

Yutaka Takahashi

Hiroyuki Kishida

Hiroshi Yamashita

Shigeru Emoto

Shinichiro Yagi

Toshiki Nanya

Hiroyuki Fushimi

Hiroshi Hosokawa

Saori Yamada

Yoshitaka Yamauchi

Tomoko Utsumi

Mariko Takii

Toyoaki Tano

Akihiro Kaneko

Takahiro Honda

Yu Naito

Namie Suzuki

Hyo Shu

Shinya Hanatani

Kohtaroh Ogino

Junichi Awamura

Shigenori Yaguchi

Naohito Shimota

Tomomi Suzuki

Takuya Saito

Kouji Narita

Sonoh Matsuoka

Kohichi Sakata

Kenji Kikuchi

Shinji Tamaki

Katsunori Kurose

Shunji Katoh

Kazuhiko Umemura

Tsuneyasu Nagatomo

Hiroshi Ikeguchi

Michiharu Suzuki

Shuji Fukano

Teruyuki Suzuki

Takanori Kudo

Noriyuki Arata

Hiroshi Ushirokawa

Naohito Bell Shine Takehara A-103 Shimota

Tomoyuki Dai6 Sumika Bldg 206 Ichikawa

Koichi Takashimahoncho M's 503 Sakata

Shinya Grand River Ave 201 Nakayama

Masami Pasco Grand Mansion Shinnumazu 302 Tomita

Shinya Grand River A 201 Nakayama

A toner including a strontium titanate powdery material as an external additive, the strontium titanate powdery material including Si-containing particles on a surface of the strontium titanate powdery material, the Si-containing particles having a number average circle equivalent diameter of 5 nm or more but 15 nm or less.

Toner, toner stored container, developer, developing device, process cartridge, and image forming apparatus

Provided is a toner including toner particles, each toner particle includes: a base particle including a binder resin; and external additive particles, wherein the external additive particles include particles each having an equivalent circle diameter of 10 nm or greater, a volume average particle diameter of the particles each having an equivalent circle diameter of 10 nm or greater is 80 nm or greater but 140 nm or less, and a ratio (circumscribed circle area/particle area) of a circumscribed circle area of the particle having an equivalent circle diameter of 10 nm or greater to a particle area of the particle having an equivalent circle diameter of 10 nm or greater is 1.60 or greater but 2.60 or less.

Toner, toner stored unit, and image forming apparatus

A toner is provided. The toner includes at least two types of polyester resins and a release agent. When the toner is subjected to a dynamic viscoelasticity measurement at a frequency of 6.28 rad/sec to obtain a temperature-dependent curve of loss tangent (tan &#x3b4;), and the temperature-dependent curve is differentiated one time with temperature, a resulting curve has a maximum value of 0.07 or more and a minimum value of 0.025 or less within a temperature range of from 85&#xb0; C. to 110&#xb0; C. When the toner is subjected to a differential scanning calorimetry (DSC), an endothermic amount measured in a first temperature rising in the DSC is 3.5 J/g or less within a temperature range of from 85&#xb0; C. to 120&#xb0; C.

Toner, developer, toner storage unit, image forming apparatus, image forming method, and method for producing printed matter

A toner is provided. The toner comprises mother particles and an external additive covering the mother particles. The mother particles comprise a binder resin, and the external additive comprises inorganic particles. The inorganic particles comprise small-size inorganic particles having an equivalent circle diameter of from 30 to 70 nm and large-size inorganic particles having an equivalent circle diameter of from 150 to 200 nm and a circularity of 0.85 or more. The large-size inorganic particles are 20 to 70 in number per 100 &#x3bc;mimage area of the toner observed with a field-emission scanning electron microscope.

Toner, image forming apparatus, image forming method, and toner storage unit

A toner, where a diffraction peak of the toner as measured by X-ray diffraction spectroscopy is present at least in a region where 2&#x3b8; is from 20&#xb0; through 25&#xb0;, and a difference between Tg1 and Tg2 is 10&#xb0; C. or less, where Tg1 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of a differential scanning calorimeter (DSC) under the heating and cooling conditions 1 defined in the specification, and Tg2 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of the differential scanning calorimeter (DSC) under the heating and cooling conditions 2 defined in the specification.

Toner, image forming apparatus, and toner stored unit

Accessory for spinning top toy

A toner is provided. The toner comprises a binder resin comprising a polyester resin, a release agent comprising an ester wax, and a wax dispersing agent comprising a hybrid resin. The hybrid resin comprises a condensation polymerization resin unit and an addition polymerization resin unit. The condensation polymerization resin unit comprises a condensation polymerization product of an aromatic alcohol component and a carboxylic acid component, and the carboxylic acid component comprises an aliphatic dicarboxylic acid having 9 to 14 carbon atoms. The addition polymerization resin unit comprises an addition polymerization product of a styrene monomer.

Toner and image forming method

A toner for electrophotography, which contains a binder resin, and a release agent, wherein a maximum value of loss tangent of the toner at 95&#xb0; C. to 115&#xb0; C. is 8 or greater, as a viscoelasticity of the toner is measured, where the loss tangent is represented by the following formula: Loss tangent (tan &#x3b4;)=loss elastic modulus (G&#x2033;)/storage elastic modulus (G').

Toner for electrophotography, image forming method, and process cartridge

A toner for electrophotography, the toner including an amorphous polyester resin, an addition polymerization-based resin, and wax that is ester wax or carnauba wax, wherein the toner satisfies relationships represented by Formula 1 and Formula 2 below,&#x2003;&#x2003;(Formula 1)|&#x2003;&#x2003;(Formula 2)where SPr is a value of a solubility parameter of the amorphous polyester resin, SPw is a value of a solubility parameter of the wax, and SPd is a value of a solubility parameter of the addition polymerization-based resin.

Toner for electrophotography, developer for electrophotography, image forming apparatus, and process cartridge

Toner contains a binder resin, a releasing agent, and a tri- or higher metal salt, wherein the toner has a weight average molecular weight (Mw) of from 7,000 to 10,000, a ratio of the weight average molecular weight (Mw) to a number average molecular weight (Mn) of 5 or less, and an acid value of from 6 mgKOH/g to 12 mgKOH/g, wherein the binder resin is a polyester resin, wherein the releasing agent is a monoester wax.

Toner, image forming method, and process cartridge

A white toner has a first temperature range not less than 25&#xb0; C. in which 60&#xb0; glossiness is 10 or less between a fixable minimum temperature and a fixable maximum temperature thereof. The white toner has a second temperature range not less than 25&#xb0; C. in which 60&#xb0; glossiness is from 30 to 60 therebetween.

White toner, and image forming method and image forming apparatus using the white toner

A toner housing container includes a container body housing a toner; a conveying portion conveying the toner from one end of the container body, in a longer direction of the container body, to its other end at which a container opening portion is provided; a pipe receiving port receiving a conveying pipe fixed to a toner conveying device; and an uplifting portion moving the toner toward a toner receiving port of conveying pipe. Such toner has a molecular weight distribution having a peak in a range of 10to 10, and has C/R of from 0.03 to 0.55 between peak height C attributed to crystalline polyester resin and R attributed to non-crystalline resin when measured by FT-IR after stored at 45&#xb0; C. for 12 hours.

Toner housing container and image forming apparatus

A toner, including: a binder resin; and a colorant, wherein the binder resin contains: a crystalline polyester resin (A); a non-crystalline resin (B); and a composite resin (C), where the composite resin (C) contains a condensation polymerization resin unit and an addition polymerization resin unit, wherein the toner contains chloroform insoluble matter in an amount of 1% by mass to 30% by mass, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000 and a half width of 15,000 or less, where the molecular weight distribution is obtained through gel permeation chromatography (GPC) of tetrahydrofuran soluble matter of the toner, and wherein the toner has an endothermic peak in a range of 90&#xb0; C. to 130&#xb0; C. in measurement through differential scanning calorimetry (DSC).

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

A toner for forming an electrophotographic image is provided, wherein the toner includes at least four types of binder resins,

Toner for forming electrophotographic image, method for manufacturing toner for forming electrophotographic image, image forming method, and process cartridge

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Shizuoka, Japan

Hisashi Nakajima