Canon Kabushiki Kaisha

Takeshi Tsujino

Junya Asaoka

Yoshinori Tsuji

Shota Amano

Koki Inoue

Yuu Sasano

Yuhei Terui

Kentaro Yamawaki

Hidekazu Fumita

Shohei Yamashita

Satoshi Iki

Masahiro Kobayashi

Ryoichi Fujita

Yasuhiro Hashimoto

Hitoshi Kanda

Nobuhisa Abe

Atsushi Kubo

Motoya Fukushima

Kenta Katayama

Minoru Omura

Naoto Aiko

Shinya Matsumura

Hitosi Kanda

Minoru Ohmura

A loop-type flash drying apparatus configured to dry an object to be treated with a gas by supplying the object into a gas stream circulating in a loop-type drying pipe, wherein the loop-type flash drying apparatus includes: (i) a loop-type drying pipe; (ii) a feeding port configured to feed an object to be treated into the drying pipe; (iii) a second blowing port configured to blow a gas into the drying pipe; (iv) a discharge port configured to discharge the object from the drying pipe; (v) a discharge region formed by the drying pipe and the discharge port; and (vi) a first blowing port through which a gas for accelerating a gas flowing in the discharge region is linearly blown toward the discharge region.

Flash drying apparatus and method of producing particles

A production method of a toner having a toner particle that contains a binder resin and an external additive that is externally added to the toner particle, wherein the production method has a toner particle dispersion step of obtaining a toner particle dispersion by dispersing the toner particle and an inorganic dispersant in an aqueous medium; and an external addition step of externally adding the external additive to the toner particle through addition of the external additive to the toner particle dispersion.

Method for producing a toner

A toner having a toner particle including a toner base particle and an organosilicon polymer coating the toner base particle, wherein when S1 (&#x3bc;m) is a total area of a non-coated part not coated with the organosilicon polymer on an outermost surface of the toner particle, S2 (&#x3bc;m) is a total area of a coated part coated with the organosilicon polymer on the outermost surface of the toner particle, and SA1 (&#x3bc;m) is a total of areas of non-coated part domains D1 with an area of not more than 0.10 &#x3bc;min size in the non-coated part not coated with the organosilicon polymer, formulae (1) and (2) below are satisfied.0.45&#x2264;[2/(1+2)]&#x2264;0.65&#x2003;&#x2003;(1)(1/1)&#x2265;0.50&#x2003;&#x2003;(2)

Toner

A toner has a toner particle including a binder resin, a colorant, and a wax, in which in a cross section of the toner particle observed under a scanning transmission electron microscope, a proportion of the number of toner particles having a void with a long diameter of 0.50 &#x3bc;m or less is 60 number % or more, and a proportion of the number of toner particles having a void in a region from an outline of the cross section of the toner particle inward to 1.00 &#x3bc;m in a total number of the toner particles having a void is 30 number % or less.

Toner and method for producing the toner

A toner which includes a binder resin, a colorant and a hydrocarbon wax has a ratio W1/W2 of the half width W1 (&#xb0; C.) of a endothermic peak derived from melting of the hydrocarbon wax in a first temperature rise process on the toner to the half width W2 (&#xb0; C.) of a endothermic peak derived from melting of the hydrocarbon wax in a second temperature rise process, as measured with a differential scanning calorimeter, with the ratio W1/W2 being not less than 0.50 and not more than 0.90.

Toner and toner production method

A method for producing toner particles by a suspension polymerization method or a dissolution suspension method comprising: applying an inorganic dispersion stabilizer-containing liquid (liquid A) to a part that can come into contact with a polymerizable monomer composition or toner particle composition, the part being on an inner wall of a vessel used in a polymerization step or a vessel used in a solvent removal step; after the application of the liquid A, carrying out the polymerization step or solvent removal step; discharging the contents of the vessel after the completion of this polymerization step or solvent removal step; and after the contents of the vessel have been discharged, bringing an acidic aqueous solution (liquid B) to dissolve the inorganic dispersion stabilizer into contact with the inner wall of the vessel.

Method for producing toner particles

A production apparatus and a production method of toner particles are provided which efficiently and stably reduce the water content of the wet toner particle cake obtained by separating and washing toner particles from toner particle dispersion in a production apparatus of toner particles granulated in a wet process. A wet toner particle cakeformed on a belt filter is aerated and dehydrated with air, and at the same time, sealing unitsprovided on the upstream and downstream sides of the aeration unitcan be operated to efficiently seal aeration air.

Filter cloth traveling type belt filter and production method of toner particles

In a process for producing toner particles by granulation carried out in an aqueous medium, a process for producing toner particles is provided which toner particles have a sharp particle size distribution and can achieve a high image density. In a process for producing toner particles to be obtained by granulating in an aqueous medium a colorant composition containing at least a colorant, an apparatus which forms the toner particles by granulation has a granulation tank and a stirrer, and, where the internal volume of the granulation tank is represented by A (L) and the volume of an air layer portion in the interior of the granulation tank by B (L), the air layer portion proportion B/A satisfies the following expression (1):0.05&#x2267;B/A&#x2003;&#x2003;(1).

Process for producing toner particles

A process for producing toner particles, in which toner particles are produced by polymerizing a polymerizable monomer composition containing at least a polymerizable monomer in an aqueous medium in a vessel, is provided. In this process, a resin composition containing a THF-insoluble resin component, which is a resin component generated in the process for producing toner particles, is kneaded. Then, the kneaded material and the polymerizable monomer are mixed together, and the resulting polymerizable monomer is polymerized to produce toner particles. For the resin composition, toner particles different from those having desired property, deposits on the vessel where the polymerization reaction occurred, or the like is used.

A process for producing a toner. The process has the steps of dispersing a fine-particle colorant in a liquid monomer mixture containing at least a liquid polymerizable monomer, dispersing the resulting colorant-dispersed liquid monomer mixture in an aqueous dispersion medium to form particles of a polymerizable monomer composition, and polymerizing polymerizable monomers present in the particles in the aqueous dispersion medium to form toner particles. In the dispersion step, a media particle agitation type wet-dispersion machine is used as a dispersion means. The dispersion machine has a cylindrical vessel having a first wall surface having a liquid-feed opening and a second wall surface having a liquid-discharge opening. The vessel is inside provided with an inner chamber and an outer chamber which are partitioned with a cylindrical separator having slits, a rotor set in the inner chamber rotatably by the rotary drive motion of a drive shaft, and a plurality of spherical media particles held in the inner chamber.

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Mishima, Japan

Takeshi Tsujino