Ricoh Company, Ltd.

Shizuoka Prefectural University Corporation

Tatsuru Moritani

Tadahiko Morinaga

Satoshi Takahashi

Tatsuki Yamaguchi

Naoki Shiraishi

Yuichi Sato

Satoshi Kojima

Yoshihiro Moriya

Shinji Aoki

Hiroshi Yamada

Ryota Inoue

Shosuke Aoai

Atsushi Yamamoto

Hiroshi Yamashita

Shinya Nakayama

Minoru Masuda

Tsuyoshi Sugimoto

Yasutada Shitara

Daisuke Asahina

Masaru Ohgaki

Masahiko Ishikawa

Rintaro Takahashi

Susumu Chiba

Kiyotada Katoh

Hisayoshi Ohshima

Akinori Saito

Hideyuki Sato

Satomi Onoue

Yoshiki Seto

Provided is a method for producing particles including: preparing a dispersion liquid with Liquid A and Liquid B, where Liquid A is a solution containing a physiologically active substance, and Liquid B is a solution containing a base material and a surfactant; and forming particles from the dispersion liquid.

Method for producing particles

A particulate poly(lactic-co-glycolic) acid (PLGA) is provided. The particulate PLGA comprises a poly(lactic-co-glycolic) acid (PLGA), and has an average volume-based panicle diameter of 80 nm or less and a relative span factor (R.S.F.) satisfying the following formula (1):0<.≤1.20  Formula (1)

Particulate poly(lactic-co-glycolic) acid, method for manufacturing particulate poly (lactic-co-glycolic) acid, and particulate poly(lactic-co-glycolic) acid manufacturing apparatus

A porous particle, wherein the porous particle has a mass median aerodynamic diameter and a volume average particle diameter that satisfy expression: y&#x2265;2x, where x denotes the mass median aerodynamic diameter and y denotes the volume average particle diameter, and the porous particle has a relative span factor (R.S.F) that satisfies expression: 0&#x3c;(R.S.F)&#x2264;1.5.

Porous particle and method for producing the same, and pharmaceutical composition

A discharge device is provided. The discharge device includes a liquid feed-discharger, and the liquid feed-discharger includes a feed unit configured to feed a liquid and a discharge unit having discharge holes configured to discharge the liquid fed by the feed unit. A ratio (X/Y) of a maximum cross-sectional area X (mm) to a minimum cross-sectional area Y (mm) of the liquid feed-discharger in a direction orthogonal to an axial direction of the liquid feed-discharger is from 1 to 5.

Discharge device, particle manufacturing apparatus, and particle

A method for manufacturing resin particles is provided. The method includes the steps of: dissolving a resin free of poly(lactic-co-glycolic acid) (PLGA) in a good solvent of the resin to prepare a resin solution; and discharging the resin solution from at least one discharge hole having an inner diameter of less than 1,000 &#x3bc;m into a poor solvent of the resin to form resin particles.

Method and apparatus for manufacturing resin particles

A particle-producing method is provided including the processes of: discharging a liquid from discharge holes provided on a liquid-storing unit storing the liquid to make the liquid into droplets, the liquid containing a physiologically active substance and a polymer; and solidifying the droplets into a particle.

Particle-producing method and particle-producing apparatus

A method for producing particles, the method including: applying vibration to a liquid including a physiologically active substance and included in a liquid-column resonance liquid-chamber to form a standing wave based on liquid column resonance, to thereby discharge the liquid from at least one discharging port, which is formed in an amplitude direction of the standing wave, to at least one region corresponding to at least one anti-node of the standing wave; and drying the liquid discharged, to thereby form particles.

Provided is a toner including toner base particles and an external additive, wherein each of the toner base particles includes a binder resin, a release agent, and silica, an average abundance ratio (X) of the silica on a region adjacent to a surface of the toner base particle is from 70% through 90%, and a projected area average value S(180) per particle of the toner when the toner is heated to 180&#xb0; C. and a projected area average value S(30) per particle of the toner when the toner is 30&#xb0; C. satisfy Formula (1) below,1.4&#x2264;(180)/(30)&#x2264;1.7&#x2003;&#x2003;Formula (1).

Toner, toner stored unit, and image forming apparatus

Provided is a toner including at least: a binder resin; and a release agent, wherein in a transmission electron microscopic (TEM) image of a torn cross-section of the toner, the release agent has an acicular or filiform shape and an average aspect ratio of 31 or greater, and wherein a displacement amount of the toner when 250 micronewtons is applied to the toner in a microcompression test is 700 nm or less.

A toner includes a toner base particle including a binder resin; a release agent; and an inorganic fine particle, and an external additive. The inorganic fine particle is silica having an average abundance ratio at the surface of the toner base particle of from 70% to 90%. The toner base particle has a BET specific surface area of from 1.0 m/g to 2.5 m/g after the external additive is removed from the toner.

Toner, toner housing unit, and image forming apparatus

A particulate material production method is provided. The particulate material production method includes ejecting a particulate material composition liquid, which includes an organic solvent and a particulate material composition including at least a resin and dissolved or dispersed in the organic solvent, from at least one nozzle to form droplets of the particulate material composition liquid in a gas phase; and solidifying the droplets of the particulate material composition liquid to prepare particles of the particulate material composition. The droplet solidifying step includes contacting the droplets with a poor solvent for the particulate material composition.

Particulate material production method, and particulate material production apparatus

Toner contains a binder resin containing one or more kinds of crystalline resin and one or more kinds of non-crystalline resin. The non-crystalline resin located at the surface portion of the toner forms a shell structure of a continuous phase of the non-crystalline resin and the toner has an amount of melting heat of 30 J/g or more in a second temperature rising as measured by differential scanning calorimetry (DSC).

Toner, development agent, and image forming apparatus

A toner containing colorant, releasing agent, and binder resin containing crystalline polyester resin, and non-crystalline polyester resin containing urethane bond, urea bond, or both, the non-crystalline polyester resin containing first and second non-crystalline polyester resins, both containing urethane bond, or urea bond, or both, wherein monomers constituting the first non-crystalline polyester resin contains isocyanate monomer for forming the urethane bond, the urea bond, or the both, in an amount of 0.5 mol % or greater to total amount of the monomers, monomers constituting the second non-crystalline polyester resin contain isocyanate monomer for forming the urethane bond, the urea bond, or the both, in an amount of 0.5 mol % or greater to total amount of the monomers, the first non-crystalline polyester resin has Tg of &#x2212;60&#xb0; C. or higher but lower than 10&#xb0; C., and the second non-crystalline polyester resin has Tg of 30&#xb0; C. or higher but lower than 70&#xb0; C.

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Shizuoka, Japan

Tatsuru Moritani