Canon Kabushiki Kaisha

Akemi Watanabe

Junichi Tamura

Hayato Ida

Daisuke Yamashita

Takaho Shibata

Yuya Chimoto

Takashi Hirasa

Ryuji Murayama

Tomoyo Miyakai

Kouichirou Ochi

Yoko Uetake

Shoji Shiba

Takayuki Horiuchi

Osamu Takamatsu

Tsuyoshi Furuse

Shoshiro Saruta

Yoshio Nakajima

Naofumi Shimomura

Makoto Souma

Atsushi Miida

Provided is an aqueous ink that has excellent ejection stability and that can be used to record an image with excellent abrasion resistance and an ink cartridge and an ink jet recording method that use the aqueous ink. The aqueous ink is an aqueous ink for ink jet containing a pigment, an organic solvent and a resin particle formed of a polyester resin or a urethane resin. The organic solvent includes a carbonate compound and the like. The ink cartridge includes an ink container configured to contain the aqueous ink and the ink jet recording method records an image on a recording medium by ejecting the aqueous ink from an ink jet recording head.

Aqueous ink, ink cartridge and ink jet recording method

The present invention provides an aqueous ink of active energy ray curable type for ink jet. The aqueous ink contains resin particles and a photo acid generator. The resin particles include a reactive group-containing resin having at least one reactive group selected from the group consisting of an epoxy group, an oxetanyl group and a vinyl ether group. Further provided are an ink cartridge and an ink jet recording method in which the aqueous ink is used.

A toner in which the content of polysiloxane is 1% by mass or more and 15% by mass or less based on the total mass of toner particles, the polysiloxane is present in the toner as a domain of 10 nm or more and 500 nm or less, and Siloxane index (Ge)/Siloxane index (D) of the toner particles is 1.0 or less.

Toner and method for manufacturing the same

A method for producing a toner includes a step (1) of forming resin microparticles in an aqueous medium in the presence of a surfactant, a step (2) of aggregating the resin microparticles to form aggregated particles, and a step (3) of heating and the aggregated particles and allowing the aggregated particles to coalesce to form toner particles, in which a resin component in the resin microparticles contains an olefinic copolymer and resin A, the resin A has an acid value of 1 mgKOH/g or more and 50 mgKOH/g or less, the resin A has a SP value of 19.0 (J/cm)or more and 21.0 (J/cm)or less, and the resin component has an olefinic copolymer content of 50% by mass or more with respect to the total mass of the resin component.

Method for producing toner

Toner containing toner particles having a resin component, in which the resin component has an olefin-based copolymer and a crystalline polyester resin, the olefin-based copolymer has a unit Y1 represented by Formula (1) and at least one kind of unit Y2 selected from the group consisting of a unit represented by Formula (2) and a unit represented by Formula (3), a content of the olefin-based copolymer contained in the resin component is 50% by mass or more based on a total mass of the resin component, a content of the unit Y2 is 3% by mass or more and 35% by mass or less based on a total mass of the olefin-based copolymer, and a melt flow rate of the olefin-based copolymer is 30 g/10 min or less.

Toner for use in electrophotographic systems

Degradation of a fluorescent material used in an image display device provided with an electron emitting device that is caused by heating in the process of manufacturing the device is prevented. A coating layercomposed of SiOis formed on the surface of fluorescent material particles, and any metalfrom among Bi, Pb, Sn, and Sb is added to the coating layerso that the metal concentration at the surface of the coating layer is equal to or greater than 0.05 ppm.

Fluorescent material substrate and image display device, and methods for manufacture thereof

A screen structure has a transparent substrate and a color filter on the transparent substrate, and light from a source of luminescence transmits the color filter and the transparent substrate. The transparent substrate has a height difference specified by a refractive index of the transparent substrate, a refractive index of the color filter, and a wavelength of the light which transmits the color filter in an interface with the color filter.

Growing community of inventors

Hiratsuka, Japan

Akemi Watanabe