Ricoh Company, Ltd.

Taichi Nemoto

Yoshitaka Yamauchi

Chiaki Tanaka

Masahide Yamada

Yoshihiro Moriya

Yukiko Nakajima

Keiji Makabe

Daiki Yamashita

Akiyoshi Sabu

Suzuka Amemori

Hiroshi Yamashita

Satoyuki Sekiguchi

Daisuke Asahina

Shizuka Hashida

Tsuyoshi Sugimoto

Ryota Inoue

Shingo Sakashita

Keiko Osaka

Rintaro Takahashi

Satoshi Izumi

Ryo Miyakoshi

Yasuo Kamada

Toma Takebayashi

Yoko Arai

Yoshimitsu Kumai

Atsushi Yamamoto

Shinya Nakayama

Kazumi Suzuki

Minoru Masuda

Hideki Sugiura

Chiyoshi Nozaki

Junichi Watanabe

Takeshi Shibuya

Hideyuki Santo

Shinji Ohtani

Masana Shiba

Tomoharu Miki

Tatsuya Morita

Yuka Mizoguchi

Susumu Chiba

Azumi Miyaake

Takeshi Sako

Idzumi Okajima

Taro Araki

Kaori Miyahara

Shohta Kobayashi

Yuuichi Satoh

Yoshihito Shimada

Nobuyuki Mase

Shunsuke Mori

Keishi Mizuno

Jyun Ishiduka

Provided is a foam sheet includes a composition including polylactic acid. The polylactic acid includes, as monomer units. D-lactic acid and L-lactic acid, and an amount of the D-lactic acid or the L-lactic acid in the polylactic acid is 98 mol % or greater. An amount of the polylactic acid is 98% by mass or greater relative to a total amount of organic matter in the foam sheet. Bulk density of the foam sheet is 0.063 g/cmor greater but 0.125 g/cmor less.

Foam sheet, product, formed product, and method for producing foam sheet

A foamed sheet including: a polylactic acid; and a filler, wherein the foamed sheet has a compressive stress of 0.2 Mpa or less when the cushioning coefficient of the foamed sheet is 10 or less; and wherein the foamed sheet has a puncture strength of 2 N or more when the sheet thickness of the foamed sheet is 2 mm.

Foamed sheet, product, and method for producing foamed sheet

An aliphatic polyester resin composition including: an aliphatic polyester resin; and calcium carbonate, wherein an amount of the calcium carbonate in the aliphatic polyester resin composition is 20% by mass or more, a number average particle diameter of the calcium carbonate in the aliphatic polyester resin composition is 0.20 &#x3bc;m or more but less than 0.40 &#x3bc;m, and a standard deviation of the number average particle diameter is 0.3 or more but 0.6 or less.

Aliphatic polyester resin composition, method for producing the same, and produced product

A toner is provided. The toner comprises a binder resin, a colorant, and a release agent. The toner satisfies the following relations (1) and (2):3.0&#xd7;10'(50)/&#x2032;(80)&#x2003;&#x2003;(1)(10)&#x2265;75 degrees C.&#x2003;&#x2003;(2)where G&#x2032;(50) represents a storage elastic modulus at 50 degrees C., G&#x2032;(80) represents the storage elastic modulus at 80 degrees C., and T(10) represents a temperature at which the storage elastic modulus is 10Pa or higher during a temperature fall from 100 degrees C. to 30 degrees C., in a measurement of dynamic viscoelasticity of the toner.

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

A toner is provided. The toner comprises a binder resin, a colorant, and a release agent. The binder resin comprises a polyester resin comprising a crystalline polyester resin. The crystalline polyester resin forms domains having a number average long diameter of from 0 to 50 nm in a cross-section of the toner. The toner satisfies the following relation:'(50)/&#x2032;(90)&#x2265;6.0&#xd7;10where G&#x2032;(50) and G&#x2032;(90) represent storage elastic modulus of the toner at 50 degrees C. and 90 degrees C., respectively.

Toner, toner accommodating unit, and image forming apparatus

A toner is provided that contains a crystalline polyester resin comprising a polycondensed resin of a dicarboxylic acid represented by the following formula (1) with a diol represented by the following formula (2). A content of a cyclic ester represented by the following formula (3) in the toner, measured by a thermal extraction gas chromatographic mass spectrometry at a thermal extraction temperature of 160&#xb0; C., is from 1 to 200 ppm in terms of toluene: where n represents an integer of from 2 to 12; where m represents an integer of from 2 to 12; and where n represents an integer of from 2 to 12, m represents an integer of from 2 to 12, and m+n&#x2265;6 is satisfied.

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

A toner comprising a binder resin is provided. When the toner is observed with an atomic force microscope in tapping mode to obtain a phase image and the phase image is binarized with an intermediate value between maximum and minimum phase difference values in the phase image to obtain a binarized image, the binarized image consists of first phase-contrast portions having a large phase difference and second phase-contrast portions having a small phase difference, where the first phase-contrast portions are dispersed in the second phase-contrast portions and a dispersion diameter of the first phase-contrast portions is in a range of from 150 to 500 nm. The toner has at least two glass transition temperatures (Tg) in respective ranges of from 40&#xb0; C. to 65&#xb0; C. and from &#x2212;30&#xb0; C. to 20&#xb0; C., determined from a DSC curve obtained at a first temperature rise in a differential scanning calorimetric measurement by a midpoint method.

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

Provided is a toner including at least: a non-crystalline polyester resin; and a crystalline polyester resin, wherein when a cross-section of the toner is observed, the crystalline polyester resin has a maximum length of 100 nm or greater but less than 500 nm, and a ratio Dv/Dn of a volume average diameter Dv of the crystalline polyester resin to a number average diameter Dn of the crystalline polyester resin is less than 1.20.

Toner, toner stored unit, image forming apparatus, and method for producing toner

To provide a method for producing a polymer, which contains: bringing a ring-opening polymerizable monomer containing an amide bond, and a compressive fluid into contact with each other to melt or dissolve the ring-opening polymerizable monomer containing an amide bond, followed by allowing the ring-opening polymerizable monomer containing an amide bond to react through ring-opening polymerization in the presence of a basic organic metal catalyst and a cocatalyst, to thereby obtain a polymer product.

Method for producing polymer

A toner prepared by a method comprising granulating while polymerizing a ring-opening polymerizable monomer with a catalyst under the presence of a surfactant and a colorant in a compressible fluid.

Toner

A particle manufacturing method of the present invention includes: ring-opening-polymerizing a ring-opening-polymerizable monomer after bringing the ring-opening-polymerizable monomer into contact with a first compressible fluid; and granulating a polymer obtained in the ring-opening-polymerizing by jetting the polymer and the first compressible fluid.

Particle manufacturing method, particles, and particle manufacturing apparatus

A polymer production apparatus, including: supplying unit containing first supplying unit to supply raw materials containing monomer, and second supplying unit to supply compressive fluid; contacting unit to bring the monomer and the compressive fluid into contact together; and outlet configured to discharge reaction product of the monomer, wherein reaction unit is provided between the contacting unit and the outlet, where the reaction unit is to pass the monomer from the contacting unit side to the outlet side, while allowing the monomer to carry out a polymerization reaction in the presence of the compressive fluid, and wherein the reaction unit contains circulation unit containing first pipe and second pipe, where a fluid is passed through the first pipe from the contacting unit side to the outlet side, and the second pipe is to return the fluid from return port provided upstream extrusion unit to inlet provided upstream the return port.

Polymer production apparatus and polymer production method

A method for producing a polymer, including: (i) continuously supplying and bringing at least a first monomer, which is ring-opening polymerizable, and a compressive fluid into contact with each other, to thereby allow the first monomer to carry out ring-opening polymerization to continuously generate an intermediate; and (ii) bringing the intermediate and a second monomer, which is identical to or different from the first monomer in kind, into contact with each other, to thereby allow the intermediate and the second monomer to carry out polymerization.

Method for producing polymer and device for producing polymer

A toner, including: a crystalline resin; a non-crystalline resin; and a colorant, wherein the toner has a sea-island structure which includes a sea containing the crystalline resin and an island containing the non-crystalline resin and the colorant, wherein the island is 1.0 &#x3bc;m or less in domain diameter, and wherein the toner is 1.7&#xd7;10Pa or less in storage elastic modulus at 160&#xb0; C.

Toner, method for producing the toner, two-component developer, and image forming apparatus

Toner contains a binder resin and a colorant, wherein the binder resin contains a resin having a polyhydroxy carboxylic acid skeleton, wherein the toner has a half effusion temperature of from 80&#xb0; C. to 120&#xb0; C. as measured by a temperature rising method using a flow tester.

Toner, development agent, and image forming apparatus

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Shizuoka, Japan

Taichi Nemoto