Hitachi Maxell, Limited

Maxell, Ltd.

Mimaki Engineering Company, Ltd.

Maxell Holdings, Ltd.

Katsuyuki Kito

Masakatsu Okawa

Taeko Izumo

Kenta Hongo

Masayuki Oya

Satoshi Kobayashi

Sadamu Kuse

Hideyuki Tanaka

Seigi Kawarai

Nagayuki Takao

Hiroshi Ota

Kunihiko Koyama

Masaru Nakayama

Kaori Kitabatake

Yoshiro Nishimura

Katsuya Uotome

The present invention relates to a resin composition for optical shaping, comprising a polymerizable compound, wherein the polymerizable compound comprises: at least one polyfunctional ethylenically unsaturated monomer (B) having a ring structure other than an isocyanurate ring structure; and at least one polyfunctional ethylenically unsaturated monomer (C) having an isocyanurate ring structure, and a content of the monomer (C) is 5 to 80 parts by mass based on 100 parts by mass of the resin composition for optical shaping, and a content of a monofunctional ethylenically unsaturated monomer (A) is less than 70 parts by mass based on 100 parts by mass of the resin composition for optical shaping.

Photo fabrication resin composition, model material composition, and photo-cured product thereof, and photo fabrication composition set

The present invention relates to a model material ink set for use in an optical molding method by an inkjet system, wherein the ink set comprises a color ink and a clear ink containing an ethylenically unsaturated monomer, as a model material ink, wherein the color ink contains, as the ethylenically unsaturated monomer, 30 to 75% of a (meth)acrylate and 10 to 50% of an ethylenically unsaturated monomer that is not a (meth)acrylate and that contains a nitrogen atom, based on a total amount of the color ink, the clear ink contains, as the ethylenically unsaturated monomer, 30 to 80% of a (meth)acrylate based on a total amount of the clear ink, provided that a content of the ethylenically unsaturated monomer that is not a (meth)acrylate and that contains a nitrogen atom is less than 10% based on the total amount of the clear ink.

Model material ink set, support material composition, ink set, three-dimensional shaped object, and method for manufacturing three-dimensional shaped object

The present invention provides a resin composition for a model material, for obtaining an optically shaped article that has flexibility and does not crack even when it is bent, and a method for manufacturing optically shaped articles that are shaped using the resin composition for a model material. The present invention relates to a resin composition for a model material, comprising, based on 100 parts by weight of a whole resin composition, 20 to 90 parts by weight of a (meth)acrylate monomer represented by the following formula (1) and/or a (meth)acrylate monomer represented by the following formula (2) as a monofunctional monomer (A), and 5 parts by weight or more of a polyfunctional oligomer as an oligomer (B), and further comprises no or 15 parts by weight or less, based on 100 parts by weight of the whole resin composition, of polyfunctional monomer (C), wherein R, Rand Reach independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms.

Resin composition for model material and method for manufacturing optically shaped article

A composition for model materials () is used for shaping an optically shaped article by an inkjet optical shaping method, comprises a monofunctional monomer (A) and an oligomer (B) as a photocurable component, further, comprises no polyfunctional monomer (C) as a photocurable component, or comprises a polyfunctional monomer (C) as a photocurable component at 3.0 parts by weight based on 100 parts by weight of a whole composition for model materials, the oligomer (B) has a hydroxyl group or an amino group, and a total molar fraction of the hydroxyl group and the amino group in a total amount of the photocurable components is less than 5.0%. The composition for model materials () can afford an optically shaped article that has flexibility, and does not crack even when it is bent.

Composition for model materials, optically shaped article, and method for producing optically shaped articles

There is provided an ink set for ink-jet printing comprising an aqueous ink and a reaction liquid, wherein the aqueous ink contains an emulsion, a surfactant, an organic solvent, a pigment, and water, the reaction liquid contains an aggregating agent, 1,2-alkanediol, a glycol ether-based solvent and/or a glycol ether acetate-based solvent, and water, and the emulsion has a glass transition temperature of 50&#xb0; C. or higher. The ink set for ink-jet printing is provided with an aqueous ink excellent in the discharge stability, and can form an image excellent in coated film properties such as the rubbing resistance and the adherence.

Ink set for ink-jet printing and ink-jet recording method

Disclosed is an ink composition for clear layer formation having excellent adhesion properties on substrates, recording layers, and clear layers, as well as excellent overcoat characteristics and refinishing properties. Further disclosed are a coating method for the ink composition, and a printed article formed using the ink composition. The ink composition for clear layer formation is used for forming at least one clear layer on a substrate, or on a printed article on which a printed coating film is formed on a substrate as a recording layer. The ink composition for clear layer formation is characterised in that: the surface free energy of the substrate is 30-45 (mJ/m); the surface free energy of the recording layer is 40-50 (mJ/m); the contact angle of the ink composition to the substrate is 30-65 degrees, the contact angle of the ink composition to the recording layer is 40-55 degrees, and the contact angle of the ink composition to the clear layer is 45-60 degrees.

Ink composition for forming clear layer, method of applying the same, and printed article using the same

The present invention relates to a primer ink comprising a polymerizable compound and a polymerization initiator, wherein the polymerizable compound comprises a monofunctional monomer having an aromatic hydrocarbon-based ring structure in a molecule and an aliphatic hydrocarbon-based monofunctional monomer, wherein a total mass of the monofunctional monomer having an aromatic hydrocarbon-based ring structure in a molecule and an aliphatic hydrocarbon-based monofunctional monomer is 80% by mass or more based on the total mass of all polymerizable compounds which the primer ink comprises, and wherein a surface tension of is 25 mN/m to 31 mN/m and a viscosity is 50 mPa&#xb7;s or less.

Primer for ink-jet recording

The present invention provides an energy ray-curable ink composition excellent in the continuous discharge property, and excellent in curability and adherability. The present invention relates to an energy ray-curable ink composition which contains a coloring agent, contains only a monofunctional monomer having an acrylic equivalent of 300 or less, and having one ethylenic double bond in one molecule, and a polyfunctional monomer having an acrylic equivalent of 150 or less, and having two or more ethylenic double bonds in one molecule as a polymerizable compound, contains an &#x3b1;-aminoalkylphenone compound and a thioxanthone compound as a photopolymerization initiator, and contains a silicone compound having a polydimethylsiloxane structure as a surface conditioner.

Energy ray-curable ink composition

An object of the present invention is to provide an energy ray-curable ink composition which is excellent in curability and adhesion, and is also excellent in storage stability. The present invention relates to an energy ray-curable ink composition comprising a coloring material; a polyfunctional monomer having three or more ethylenical double bonds in one molecule as a polymerizable compound; an &#x3b1;-aminoalkylphenone-based compound and a thioxanthone-based compound as photopolymerization initiators; and a hindered amine-based compound having a 2,2,6,6-tetramethylpiperidinyl group as an antigelling agent.

An active energy ray-curable ink composition comprising a colorant, a monomer and a photopolymerization initiator, in which the monomer contains an acrylamide derivative in an amount of 10 to 90% by weight based on the whole weight of the ink composition, and the ink composition has a viscosity of 3 to 35 mPa&#xb7;s at 25&#xb0; C. The ink composition has a low viscosity without dilution by a diluent solvent, good storage stability, good pigment dispersibility when a pigment is used as a colorant and also good continuous ejection stability to a printing medium, has a good curing property at a low energy level such as a cumulative amount of light of 150 mJ/cmor less, and it can attain good printing quality on nonabsorbable printing medium and achieves good adhesion of printed images to the printing medium.

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Osaka, Japan

Katsuyuki Kito