Seiko Epson Corporation

E Ink Corporation

Shinshu University

Seiko Eposon Corporation

Kiyoshi Nakamura

Toru Saito

Naoki Koike

Toshiyuki Yoda

Kyohei Tanaka

Masahiko Nakazawa

Shinobu Yokokawa

Tomoyuki Ushiyama

Keiichi Inoue

Soichi Moriya

Midori Sekine

Harunobu Komatsu

Hiroki Nakahara

Yoshinobu Yoshida

Shohei Namikoshi

Toru Katakabe

Tsuyoshi Sano

Takeo Kawase

Chigusa Sato

Tadashi Yamada

Nobukazu Nagae

Tsutomu Miyamoto

Hirofumi Hokari

Keita Hanawa

Taketomi Kamikawa

Takuya Ota

Kei Kamakura

Kazuya Nakamura

Saichi Hirabayashi

Haruya Koyama

Musubu Ichikiwa

Asako Kubota

A radiation curable ink jet composition includes polymerizable compounds and a photopolymerization initiator, the polymerizable compounds include a monofunctional monomer, a content of the monofunctional monomer with respect to a total mass of the polymerizable compounds is 90 percent by mass or more, and the photopolymerization initiator includes ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate.

Radiation curable ink jet composition and ink jet method

An ink jet recording apparatus including an ink jet head for ejecting and attaching a radiation-curable ink jet composition to a recording medium, an inert gas supply portion for supplying an inert gas to the recording medium to which the radiation-curable ink jet composition is attached, and an irradiation portion for applying radiation to the radiation-curable ink jet composition attached to the recording medium under supply of an inert gas, wherein the inert gas supply portion slantingly ejects the inert gas toward just under the irradiation portion.

Ink jet recording apparatus having an inert gas supply portion

A method for producing a recorded matter includes a first ejection step of ejecting a first ink, which is a radiation-curable ink jet composition, and adhering the first ink to a recording medium, a first irradiation step of irradiating radiation to the first ink adhered to the recording medium to obtain a cured coating film of the first ink, a second ejection step of ejecting a second ink, which is a radiation-curable ink jet composition, and adhering the second ink to the cured coating film of the first ink so that the duty is 1% or more and 20% or less, a second irradiation step of irradiating radiation to the second ink adhered to the recording medium to cure the second ink to obtain a recorded matter, and a lamination step of laminating, in the recorded matter, a recording surface to which the first ink and the second ink have been adhered, and a non-recording surface to which the first ink and the second ink have not been adhered, so that both surfaces face each other.

Method for producing recorded matter

An ink jet recording method includes ejecting a radiation-curable ink jet composition to a recording medium from an ink jet head, and curing the ink jet composition ejected to the recording medium by irradiating with radiation from a LED irradiator having a peak wavelength of 250 to 310 nm to form a cured coating film. The ink jet composition contains a polymerizable compound and an α-hydroxyketone-based initiator.

Ink jet recording method and ink jet recording apparatus

An ink jet recording method is a method in which a cyan ink, a magenta ink, a black ink, and a yellow ink radiation that are curable inks are ejected from ink jet heads to attach the radiation curable inks to a recording medium. The method includes, in this order, a first step of attaching the cyan ink, the magenta ink, and the black ink onto the recording medium and applying temporary curing radiation to the recording medium and a second step of attaching the yellow ink onto the recording medium and applying full curing radiation to the recording medium without applying the temporary curing radiation.

Ink jet recording method using temporary curing radiation

An ink set of radiation curable ink jet compositions, includes: an under layer ink; and an over layer ink, and the under layer ink contains, as a polymerizable compound, 80.0 percent by mass or more of a monofunctional polymerizable compound with respect to a total mass of polymerizable compounds and contains 55.0 percent by mass or more of a polymerizable compound having a nitrogen heterocyclic structure and/or a polymerizable compound having a hydroxy group in total with respect to the total mass of the polymerizable compounds.

Ink set and ink jet recording method

A radiation curable ink jet composition includes polymerizable compounds; and a photopolymerization initiator, the polymerizable compounds include a vinyl ether group-containing (meth)acrylate represented by the following general formula (I), a content of the vinyl ether group-containing (meth)acrylate with respect to a total mass of the radiation curable ink jet composition is 15 percent by mass or more, and the photopolymerization initiator includes ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate.HC═CR—CO—OR—O—CH═CH—R  (I)In the above formula, Rrepresents a hydrogen atom or a methyl group, Rrepresents a divalent organic residue having 2 to 20 carbon atoms, and Rrepresents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms.

A radiation-curable ink jet composition includes vinyl methyl oxazolidinone and a vinyl ether group-containing (meth)acrylate represented by the following formula (1):HC&#x2550;CR&#x2014;CO&#x2014;OR&#x2014;O&#x2014;CH&#x2550;CH&#x2014;R(where, Ris a hydrogen atom or a methyl group, Ris a divalent C2-C20 organic residue, and Ris a hydrogen atom or a monovalent C1-C11 organic residue).

Radiation-curable ink jet composition and ink jet method

A UV-curable ink jet ink composition includes: 10.00% by mass or more and 60.00% by mass or less, relative to a total mass of the ink composition, of a compound represented by formula (A); 10.00% by mass or more and 50.00% by mass or less, relative to the total mass of the ink composition, of one or more monofunctional monomers having an alicyclic hydrocarbon group or a cyclic ether group; 0.05% by mass or more and 0.50% by mass or less, relative to the total mass of the ink composition, of one or more fluorescent brighteners including a compound represented by formula (b1), (b2), (b3), or (b4); and 3.00% by mass or more and 8.00% by mass or less, relative to the total mass of the ink composition, of one or more acylphosphine oxide polymerization initiators.

UV-curable ink jet ink composition

A radiation curable ink comprises a compound represented by the following Formula (I): a compound represented by the following Formula (II): and a compound represented by the following Formula (III): 

Radiation curable ink

According to the invention, an electrophoretic dispersion liquid includes at least one type of an electrophoretic particle, and a dispersion medium, in which the content of transition metal of group 8 elements derived from a catalyst which is used to generate at least one of a block copolymer (a particle surface treatment agent) used to form the electrophoretic particle and the dispersion medium is in a range of greater than 0 ppm to equal to or less than 2 ppm in the electrophoretic dispersion liquid.

Electrophoretic dispersion liquid, production method of electrophoretic dispersion liquid, electrophoretic sheet, electrophoretic device and electronic apparatus

An electrophoretic particle includes a base particle (particle), a first compound, a second compound, and a third compound bonded to the base particle. The first compound is a polymer having a dispersion portion derived from a first monomer, and a bonding portion derived from a second monomer, and is connected to the base particle at the bonding portion. The second compound includes a non-polar group and a second functional group and is connected to the base particle at the second functional group. The third compound includes a charging group and a second functional group and is connected to the base particle at the second functional group.

Electrophoretic particle, method of manufacturing electrophoretic particle, electrophoresis dispersion liquid, electrophoresis sheet, electrophoresis device, and electronic apparatus

Electrophoretic dispersion liquid, method of manufacturing electrophoretic dispersion liquid, electrophoretic sheet, electrophoretic device, and electronic apparatus

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Matsumoto, Japan

Kiyoshi Nakamura