Sakata Inx Corporation

Okinori Nakashima

Takuya Myose

Yoshiyuki Aoki

Kazuhiro Fuke

Ryohei Miyake

Koki Ogasahara

Yoichi Sato

Jun Kinjyo

Jun Kinjoh

Jun Kawabata

Takuya Okamoto

Ryoichi Nitta

Yuki Yoshida

Daigo Shiozaki

An active energy ray-curable inkjet ink composition contains: (A) hydroxy group-containing monofunctional (meth)acrylates by 20.0 to 60.0% by mass in the total amount of all polymerizable components; (B) polyfunctional monomers having ether bonds; (C) amine-modified oligomers by 10.0 to 50.0% by mass in the total amount of all polymerizable components; (D) ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate as a polymerization initiator; and (E) polymeric sensitizers. The active energy ray-curable inkjet ink composition allows for printing on films used for food packaging that are subject to more stringent property requirements.

Active energy ray-curable inkjet ink composition

An object is to provide a nonaqueous inkjet ink composition offering excellent solid filling property and anti-mottling property, as well as excellent ink stability, discharge stability, and scratch resistance, even when printed at high speed on printing targets whose printing face is constituted by a polyvinyl chloride, ethylene-vinyl acetate-based copolymer, or other vinyl-based polymer, etc. As a solution, a nonaqueous inkjet ink composition is provided that contains acrylic-based resin, organic coloring pigment and/or carbon black, alumina, pigment dispersant, and organic solvent, wherein the organic solvent comprises propylene carbonate, diethylene glycol dialkyl ether, and dipropylene glycol alkyl ether acetate, and alumina is contained by 5 to 30 parts by mass relative to 100 parts by mass representing the total of organic coloring pigment and carbon black.

Nonaqueous inkjet ink composition

Provided is an ink composition for photo-curable inkjet printing, comprising a pigment, a photopolymerizable compound, and a photopolymerization initiator, wherein the photopolymerizable compound comprises 5 to 30% by mass of an amine-modified oligomer and 5 to 30% by mass of N,N-dimethylacrylamide, wherein the photopolymerization initiator comprises at least any one of ethoxy(2,4,6-trimethylbenzoyl)phenylphosphine oxide and bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, and wherein a total amount of ethoxy(2,4,6-trimethylbenzoyl)phenylphosphine oxide and bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide is 12% by mass or less.

Ink composition for photocurable inkjet printing

An active energy ray-curable inkjet ink composition contains a pigment which contains Pigment Orange 71 and Pigment Violet 19 which is 30.0 to 85.0% by mass relative to a total mass of Pigment Violet 19 and Pigment Orange 71, and a photopolymerizable compound which contains, in a total amount of all polymerizable components,(A) 0.20 to 15.0% by mass of a multifunctional amine-modified oligomer; (B) 50.0% by mass or more of a monofunctional monomer; (C) 35.0% by mass or more of a monofunctional monomer whose glass transition temperature is 20° C. or more; (D) 35.0% by mass or more of a monofunctional monomer whose glass transition temperature is 10° C. or less; (E) 2.0 to 11.0% by mass of a multifunctional monomer whose glass transition temperature is 10° C. or less; and (F) 10.0 to 25.0% by mass of a nitrogen-containing monofunctional monomer.

An active energy ray-curable inkjet printing ink composition satisfies requirements A to E below is provided: (A) the content of amine-modified oligomer is 1.0 to 20.0% by mass; (B) alkoxy group-containing (meth)acrylate monomers are contained by 2.0 to 20.0% by mass; (C) (meth)acrylate monomers having an alkyl group with 6 to 20 carbon atoms is contained by 2.0 to 25.0% by mass; (D) at least one type selected from the group that consists of 1,6-hexanediol diacrylate, 3-methyl-1,5-pentanediol diacrylate, dipropylene glycol diacrylate, 1,10-decanediol diacrylate, propoxylated(2)neopentyl glycol diacrylate, and hydroxypivalic acid neopentyl glycol diacrylate is contained by 30.0 to 60.0% by mass; (E) as photopolymerization initiators, ethoxy(2,4,6-trimethylbenzoyl)phenylphosphine oxide is contained by 3.0 to 15.0% by, and oligo(2-hydroxy-2-methyl-1-(4-(1-methylvinyl)phenyl)propanone) and/or 2-hydroxy-1-{4-[4-(2-hydroxy-2-methylpropionyl)phenoxy]phenyl}-2-methylpropanone is/are contained by 2.0 to 10.0% by mass, where the total content of photopolymerization initiators is 6.0 to 25.0% by mass.

Active energy ray-curable inkjet printing ink composition

A nonaqueous inkjet ink composition contains acrylic-based resin, pigment, pigment dispersant, and organic solvent, wherein the nonaqueous inkjet ink composition is characterized in that it contains propylene carbonate, diethylene glycol dialkyl ether, as well as tetraethylene glycol dialkyl ether, as the organic solvent, and is compounded in a manner that the propylene carbonate accounts for 1.0 to 20.0% by mass in the ink composition and the content of the diethylene glycol dialkyl ether relative to the propylene carbonate content, or 'diethylene glycol dialkyl ether/propylene carbonate,' falls between 9.0 and 20.0.

Provided is a photo-curable inkjet printing ink composition, comprising (A) an acrylicated amine compound having two photopolymerizable functional groups and two amino groups in a molecule, (B) a (meth)acrylic monomer having an alkoxy group, and (C) at least one selected from the group consisting of hexanediol acrylate, 3-methyl-1,5-pentanediol diacrylate, dipropylene glycol diacrylate, and neopentyl glycol diacrylate hydroxypivalate, wherein a content of the component (A) is 3 to 18% by mass in the ink composition, wherein a content of the component (B) is 5 to 35% by mass in the ink composition, and wherein a content of the component (C) is 30 to 60% by mass in the ink composition.

Ink composition for photo-curable inkjet printing

An object is to obtain a photocurable inkjet printing ink composition that demonstrates excellent preservation stability and discharge property, while also presenting curability under ultraviolet light from a light-emitting diode (LED) light source, as well as good adhesion, flexibility and tackiness. As a solution, a photocurable inkjet printing ink composition containing photopolymerizable compounds and photopolymerization initiator is provided, wherein the photocurable inkjet printing ink composition satisfies A to D: A. 2-(allyloxy methyl) methyl acrylate is contained by 5 to 40 percent by mass in all photopolymerizable compounds; B. multifunctional monomers and/or multifunctional oligomers of 0° C. or lower in glass transition temperature are contained by 5 to 20 percent by mass in all photopolymerizable compounds; C. amino group and/or amide group-containing monomers and/or oligomers are contained; and D. the ink composition has a viscosity of 30 mPa·s or lower at 25° C.

Photocurable inkjet printing ink composition

A continuous-type inkjet ink composition includes a polyvinyl butyral resin (Resin 1) and a rosin ester resin (Resin 2), and organic solvents, wherein the content of Resin 1 in the inkjet ink composition is 1.0 to 8.0 percent by mass, and the content ratio of Resin 1 and Resin 2 satisfies 'Resin 1:Resin 2=20:1 to 10:8' based on ratio by mass, and the total quantity of organic solvents regulated by industrial health and safety regulation is 5 percent by mass or less in the inkjet ink composition. The composition demonstrates excellent discharge stability and jetting property as well as excellent adhesion to various types of base printing materials including polyolefin films with no surface treatment.

Continuous-type inkjet ink composition

An object is to provide a continuous inkjet ink composition that has excellent storage stability and anticorrosion effect on a metal member, and that allows printing with good image quality. As a solution, a continuous inkjet ink composition is provided that includes a pigment, a resin, a metal salt of thiocyanic acid at 0.05 to 1.7% by mass in the composition, and tetraalkylammonium hexafluorophosphate at 0.05 to 2.7% by mass in the composition.

Continuous inkjet ink composition

Disclosed is an ink composition for photo-curable ink jet printing, comprising (A) at least one selected from the group consisting of hexanediol acrylate, 3-methyl-1,5-pentanediol diacrylate, dipropylene glycol diacrylate, and hydroxy pivalic acid neopentyl glycol diacrylate, (B) at least one of vinyl amide monomer and acryloyl amine monomer, (C) an acrylated amine compound having two photopolymerizable functional groups and two amino groups in a molecule, (D) a monofunctional monomer (excluding vinyl amide monomer which is the (B) component), and a photopolymerization initiator, wherein a content of the (A) component is 40 to 70% by mass, wherein a content of the (B) component is 5 to 30% by mass, wherein a content of the (C) component is 0.1 to 15% by mass, and wherein a viscosity is 200 mPa·s or less.

Ink composition for photo-curable ink jet printing

An inkjet printing device for multi-color printing includes: multi-color inkjet nozzles that move in the direction perpendicular to the moving direction of the target base printing material and also in the direction parallel to the surface of the target base printing material; plasma ejection ports provided downstream of the multi-color inkjet nozzles in a manner oriented facing the surface of the multiple colored inks printed on the target base printing material; and an electron beam irradiation part located on the downstream side of the inkjet nozzles and plasma ejection ports, in a manner oriented facing the printed surface of the target base printing material.

Plasma electron beam treatment inkjet printing device

An object is to obtain a photocurable inkjet printing ink composition that demonstrates excellent preservation stability and discharge stability, good adhesion, bending tolerance property, and tackiness, and high hardness. As a solution, a photocurable inkjet printing ink composition containing photopolymerizable compounds and photopolymerization initiator is provided, wherein the photocurable inkjet printing ink composition satisfies the requirements of A to E:

Clear inks are prone to heat-induced micro-gelling that can cause their storage stability to drop, and micro-gelling may also occur in clear inks with the passage of time, in which case their inkjet discharge property may drop. As a solution, a photocurable clear ink composition for inkjet printing is provided, which contains a photopolymerizable compound, a photopolymerization initiator, and an inorganic filler of 1 to 200 nm in average grain size accounting for 0.05 to 5.0 percent by mass in the composition, and whose visible light transmission factor is 30% or higher.

Photocurable clear ink composition for inkjet printing

An object is to provide an ink composition for inkjet printing that permits inkjet printing, particularly on metal surfaces, wherein such ink composition possesses sufficiently high adhesion and heat resistance with respect to metal surfaces. As a means for achieving the object, a photocurable inkjet printing ink composition is provided, which contains, relative to the entire ink composition, 0.1 percent by mass or more of an acid-modified acrylic monomer and 10 to 30 percent by mass of a monofunctional monomer with a Tg of 100&#xb0; C. or above, wherein the monofunctional monomer accounts for 80 percent by mass or more of all monomers.

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Osaka, Japan

Okinori Nakashima