SAKATA INX CORPORATION

An aqueous inkjet ink composition for textile printing contains A to E: A. a pigment; B1. a solvent with a boiling point of 280° C. or higher; B2. as solvents with a boiling point of 200° C. or lower, a glycol ether accounting for 0.1 to 6.0% by mass, and a dihydric alcohol, wherein the ratio by mass of the solvent B1 and solvent B2, or B1/B2, is 0.3 to 3.0; C. a polyurethane resin-based water-dispersible resin; D. a surfactant; and E. a blocked isocyanate crosslinking agent accounting for 0.1 to 5.0% by mass. The aqueous inkjet ink composition is intended to have appropriate discharge property, which is capable of demonstrating superior image density and higher levels of washing fastness even when printed on cotton or polyester cloth, etc.

An object is to provide a photocurable inkjet printing ink composition offering curability and adhesion on printing targets including sheets whose printing face is constituted by paper, polyester, polyvinyl chloride, ethylene-vinyl acetate-based copolymer, or other vinyl-based polymers, etc., and additionally having storage stability. The cured coating film has low odor, low tackiness, abrasion resistance, high water resistance, high ethanol resistance, stretchability, and excellent bending resistance. Means for solving the problem includes providing a photocurable inkjet printing ink composition containing vinyl methyl oxazolidinone by 5 to 50% by mass relative to the entire ink composition, a monofunctional photopolymerizable monomer having a glass-transition temperature of 10° C. or less by 10 to 50% by mass relative to the entire ink composition, a colorant, and a photopolymerization initiator.

An ink composition for printing on metal including a coloring pigment, resins, and a solvent is employed, wherein the ink composition contains a rosin-modified resin having an acid value of 10 to 400 mg KOH/g as at least part of the resins, and the solvent contains at least one compound selected from the group consisting of compounds represented by general formula (1): wherein each A is independently an alkylene group having 2 to 4 carbon atoms that may have a branch structure, R is an alkyl group having 1 to 13 carbon atoms that may have a branch structure and/or a ring structure, and n is an integer of 2 to 6.

A UV-curable aqueous inkjet printing ink composition contains: water-soluble acrylamide-based monomers by 20.0 to 70.0% by mass, water-soluble hydroxyl group-containing monofunctional monomers by 5.0 to 60.0% by mass, and water-insoluble polymerizable compounds by 8.0 to 35.0% by mass, relative to the total mass of all polymerizable components; a photopolymerizable initiator and/or sensitizer by 3.0 to 10.0 parts by mass relative to 100 parts by mass representing the total mass of all polymerizable components; a pigment; and water; wherein the ratio of the water-soluble acrylamide-based monomers and water-soluble hydroxyl group-containing monofunctional monomers, (water-soluble acrylamide-based monomers/water-soluble hydroxyl group-containing monofunctional monomers), is 0.3 to 10.0; and the ink composition has ability to be partially cured by being irradiated with a UV-LED light having a peak wavelength between 365 and 405 nm, to a cumulative light quantity of 100 mJ/cm 2 or less.

This continuous type inkjet ink composition contains a dye, a resin, an electrical conductivity imparting agent, and an organic solvent. The dye is an organic dye having a disazo backbone. The electrical conductivity imparting agent is an ionic compound having, at an anionic portion thereof, at least one element selected from the group consisting of phosphorus and boron. The continuous type inkjet ink composition causes the contained dye to be dissolved therein, and enables obtaining of a printed matter having excellent retort resistance.

It is an object of the present invention to provide a primer composition for surface-printed flexible packaging, an ink set, a surface-printed matter, and an inkjet printing method, which can impart excellent solid uniformity, bleeding resistance, abrasion resistance, alcohol resistance, and heat resistance to a coating film when an inkjet image is formed after applying the primer composition. Provided is a primer composition for surface-printed flexible packaging comprising an acryl-based resin emulsion emulsified with a polymer, N-oleoyl sarcosine, a hydrazine-based compound having at least two or more hydrazine residues in a molecule, and wax, wherein a content of the acryl-based resin emulsion is 3 to 40% by mass in terms of solid content, and wherein a glass transition temperature of the acryl-based resin emulsion is-40 to 30° C.

Provided is an ink composition for solvent-based inkjet printing, including a colorant, a dispersant, and a solvent, in which the colorant includes a pigment and/or a dye, the solvent includes a saturated fatty acid diester-based solvent and an unsaturated fatty acid monoester-based solvent, a total amount of the saturated fatty acid diester-based solvent and the unsaturated fatty acid monoester-based solvent is 50% by mass or greater with respect to a total amount of the ink composition for solvent-based inkjet printing, and a mass ratio of the saturated fatty acid diester-based solvent to the unsaturated fatty acid monoester-based solvent is 2:8 to 8:2.

A photocurable inkjet ink composition containing the following A to E, having a viscosity of 100 cps or less and a surface tension of 32.0 mN/m or less: A. a polymeric photoinitiator having ethylenic unsaturated bonds, B. a thioxanthone-based compound having photosensitization action, C. a (meth)acrylate-based polymer compound, D. a (meth)acrylamide-based compound and/or aminobenzoate compound, and E. a surface additive. The photocurable inkjet ink composition is made to have appropriate viscosity as an inkjet ink composition while also realizing sufficiently high reactivity to reduce migration substances generating from the coating film of the cured photocurable inkjet ink composition.

An aqueous primer composition includes a water-soluble multivalent metal salt, a polyester-based polyurethane emulsion, and water. A set includes the aqueous primer composition and an inkjet recording ink composition. A printed matter obtained by using the set includes a base material layer, a primer layer containing the water-soluble multivalent metal salt and the polyester-based polyurethane, and a printing layer. The aqueous primer can offer excellent preservation stability, and can allow for formation of a printing layer having high adhesion, capable of forming high-quality images with little bleeding/mottled appearance when printing images, text, etc., to form a printing layer on a plastic film or other nonabsorbent medium using inkjet recording ink compositions, offering excellent water resistance and lamination suitability.

An active energy ray-curable inkjet printing ink composition satisfies requirements A to D below: A: an amine-modified oligomer is contained by 1.0 to 20.0% by mass in all active energy ray-polymerizable components; B: alkoxy group-containing (meth)acrylates are contained by 2.0 to 20.0% by mass in all active energy ray-polymerizable components; C: a (meth)acrylate containing an alkyl group with 10 to 20 carbon atoms is contained by 2.0 to 25.0% by mass in all active energy ray-polymerizable components; and 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, propoxylated(2)neopentyl glycol diacrylate, 1,10-decanediol diacrylate, and hydroxypivalic acid neopentyl glycol diacrylate is contained by 30.0 to 60.0% by mass in all active energy ray-polymerizable components.