Toshiba Tec Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Other

Takashi Urabe

Satoshi Araki

Taishi Takano

Maiko Yoshida

Masahiro Ikuta

Motonari Udo

Yasuhito Noda

Takayasu Aoki

Tsuyoshi Itou

Junichi Ishikawa

Takafumi Hara

Shuitsu Sato

Tsuyoshi Ito

Asumi Matsumoto

Takahito Kabai

Yuichi Hori

In accordance with an embodiment, a toner particle comprises two or more glass transition temperatures. Wherein, a first glass transition temperature is within a range from 5 degrees centigrade to 20 degrees centigrade and a second glass transition temperature is within a range from 50 degrees centigrade to 65 degrees centigrade.

Toner particle, electrophotographic toner, developing agent, toner cartridge and image forming apparatus, and manufacture method of toner particle

A toner includes toner particles including particles having a flaky shape and made of bright pigment material and a binder resin coated on the surfaces of the particles. A ratio of an exposed surface area of the particles with respect to a surface area of the toner particles is greater than 0% and equal to or smaller than 20%.

Toner containing particles having flaky shape and made of bright pigment material

A toner includes first toner particles and second toner particles. Each of the first toner particles includes a plate-like colorant particle covered with binder resin particles, and a volume average size of the plate-like colorant particle is equal to or greater than 6 &#x3bc;m. Each of the second toner particles includes at least one of a binder resin and a releasing agent and not including a colorant, an aspect ratio of the second toner particles is equal to or smaller than 3, and a content ratio of the releasing agents with respect to the second toner particles is equal to or greater than 4 wt % and equal to or smaller than 24 wt %. A content ratio of the second toner particles with respect to the first toner particles is greater than 1 wt % and equal to or smaller than 75 wt %.

Toner having toner particles including a colorant and particles not including a colorant

A toner includes a crystalline polyester resin in an amount equal to or greater than 25% by mass. The toner satisfies the following formula when the toner is tested using a capillary rheometry measurement during which a pellet of the toner is pressed by a member while being heated: 0.3&#x2264;(first temperature&#x2212;second temperature)/(second temperature&#x2212;third temperature)&#x2264;1, where the first temperature is a temperature at which the member falls 4 mm, the second temperature is a temperature at which the member falls 2 mm, and the third temperature is a temperature at which the member starts to fall.

Toner containing crystalline polyester resin and method of manufacturing the same

An aromatic printed object containing a film-like substrate and a printing section formed on the film-like substrate using a perfume microcapsule-containing toner. The aromatic printed object is an adhesive sheet wherein the printing section is adherend surface. A protective layer is pressed with the adherend surface. A fragrance diverges by peeling off the protective layer of the film-like substrates.

Aromatic printed object and manufacture method for the same

A toner includes a plurality of toner particles containing a binder resin and one or more microcapsules that contain a fragrant material. A ratio of a number of toner particles that contain at least one microcapsule in a region from a surface thereof to 1 &#x3bc;m in depth with respect to a total number of toner particles in the region is equal to or greater than 60%.

Toner including microcapsules that contain a fragrant material

An image forming apparatus and an image forming method through which an effect of granting flavor to a printing object is excellent. In accordance with an embodiment, an image forming apparatus comprises a developing device and a fixing device. A toner is housed in the developing device. The fixing device includes a fixing roller and a pressure roller. The toner contains binder resin and a microcapsule in which perfume is encapsulated. A glass transition temperature of the toner is below 60 degrees centigrade. A nip part is formed by the fixing roller and the pressure roller. A pressure applied to an image receiving medium passing through the nip part is below 0.19 N/mm.

Image forming apparatus and image forming method

A method for producing toner includes adding a liquid containing dispersed resin particles into a liquid containing dispersed colorant particles having a volume average particle size of equal to or greater than 6 &#x3bc;m and having a zeta-potential sign opposite to a zeta-potential sign of the resin particles, until a zeta-potential of aggregates of the colorant particle and the resin particles has a sign opposite to the zeta-potential sign of the colorant particles, adjusting the zeta-potential of the aggregates, such that an absolute value of the zeta-potential of the aggregates is smaller than an absolute value of the zeta-potential of the resin particles by more than 10 mv, and adding a liquid containing dispersed resin particles having a zeta-potential sign that is the same as the sign of the adjusted zeta-potential of the aggregates, into a liquid containing the aggregates.

Method for producing toner by managing zeta-potentials of particles

A method of producing an electrophotographic toner is disclosed in an embodiment. A colorant dispersion liquid that contains colorant particles having an average particle diameter of 6 &#x3bc;m or greater is formed. A resin dispersion liquid that contains resin particles is formed. A wax dispersion liquid that contains wax particles is formed. In a first aggregation, the resin dispersion liquid and the wax dispersion liquid are added to the colorant dispersion liquid.

Method of producing electrophotographic toner, electrophotographic toner, toner cartridge, and image forming apparatus

A toner includes toner particles, each containing binder resin and a plurality of microcapsules dispersed therein, each of the microcapsules containing a liquid material. A method for forming an image on a medium includes forming an electrostatic latent image on a carrier, forming a toner image by developing the electrostatic latent image using the toner, transferring the toner image onto a medium, and fixing the transferred toner image on the medium.

Toner containing aromatic materials and method of forming an image using the same

An aromatic printed object of an embodiment comprises a film-like substrate and a printing section having a perfume microcapsule-containing toner. A pair of film-like substrates that face each other across the printing section is pressed, and fragrance diverges by peeling off the pressed part of the film-like substrates.

A toner includes a crystalline polyester resin in an amount equal to or greater than 25% by mass. The toner satisfies the following formula when the toner is tested using a capillary rheometry measurement during which a pellet of the toner is pressed by a member while being heated: 0.3&#x2266;(first temperature&#x2212;second temperature)/(second temperature&#x2212;third temperature)&#x2266;1, where the first temperature is a temperature at which the member falls 4 mm, the second temperature is a temperature at which the member falls 2 mm, and the third temperature is a temperature at which the member starts to fall.

An object of the present invention is intended to provide an image forming apparatus and an image forming method through which an effect of granting flavor to a printing object is excellent. In accordance with an embodiment, an image forming apparatus comprises a developing device and a fixing device. A toner is housed in the developing device. The fixing device includes a fixing roller and a pressure roller. The toner contains binder resin and a microcapsule in which perfume is encapsulated. A glass transition temperature of the toner is below 60 degrees centigrade. A nip part is formed by the fixing roller and the pressure roller. A pressure applied to an image receiving medium passing through the nip part is below 0.19 N/mm.

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Sunto-gun, Japan

Takashi Urabe