Abstract: An aqueous inkjet ink composition contains a pigment, an alkali-soluble resin, a polyolefin resin emulsion, a basic compound, an aqueous medium, and a surfactant, wherein the alkali-soluble resin is a copolymer of acrylic acid/lauryl acrylate/styrene; a glass transition temperature of the alkali-soluble resin is 45° C. to 95° C.; an average grain size of the polyolefin resin emulsion is 5 to 300 nm; a solids content of the polyolefin resin emulsion is 0.5 to 5.0 percent by mass in the aqueous inkjet ink composition; and the surfactant contains at least an acetylenediol-based surfactant. The aqueous inkjet ink composition is adapted to offering excellent high-gap discharge stability, antifouling property, adhesion, drying property, abrasion resistance, discharge stability, and preservation stability, even when printed on nonabsorbent media.

Abstract: An ink set including an aqueous inkjet ink composition and a primer composition. The aqueous inkjet ink composition contains a pigment, an alkali-soluble resin, a resin emulsion, a surfactant, a water-soluble solvent, and water; the resin emulsion contains a polyurethane resin emulsion and/or a polyolefin resin emulsion; the surfactant contains an alkyl sulfonate and/or a polyoxyethylene alkyl ether sulfate; the aqueous inkjet ink composition has a content of the alkyl sulfonate and/or the polyoxyethylene alkyl ether sulfate of 0.05% by mass or more and 0.5% by mass or less; and the primer composition contains an aggregation accelerator that accelerates aggregation of the aqueous inkjet ink composition. The ink set provides a printed matter having good print image quality and excellent abrasion resistance, and has good storage stability and ejection stability.

Abstract: An object is to provide a method for storing or transporting an aqueous white ink composition for inkjet that does not cause precipitation of a pigment therein during storage for a long period or transport, and allows the pigment to be easily redispersed even if precipitation occurs. As means for solving the problems, a storing method is provided that includes placing an aqueous white ink composition for inkjet containing titanium oxide and a pigment dispersant in a tank and maintaining the entire aqueous white ink composition for inkjet in the tank at a temperature of ?5 to ?35° C.

Abstract: Provided is an ink composition for inkjet printing, comprising a coloring material, water, an organic solvent, resin fine particles, and a surfactant, wherein the organic solvent includes a first organic solvent and a second organic solvent that is different from the first organic solvent, wherein a total amount of the first organic solvent and the second organic solvent is 90 mass % or more in the organic solvent, wherein the first organic solvent is propylene glycol, wherein the second organic solvent has a boiling point of 120 to 200° C., and includes at least one of glycols, glycol ethers, or methoxybutanols, and wherein a content of the first organic solvent is 15 to 50 mass % in the ink composition.

Abstract: A primer composition for a process of inkjet printing includes a resin emulsion, a cohesion promoter, surfactant(s) (A), nonionic surfactant(s) (B), and water. The resin emulsion includes a polyolefin-based resin emulsion and/or a urethane-based resin emulsion. The surfactant(s) (A) include(s) an acetylene-based surfactant and/or a silicone-based surfactant. Each nonionic surfactant (B) has a HLB value of 10.0 or greater but under 15.5 and has multiple polyoxyalkylene groups in a molecule, and includes a polyoxyalkylene group-containing fatty acid glyceryl, a polyoxyalkylene group-containing aliphatic amine, and/or a polyoxyalkylene group-containing sorbitan fatty acid ester. The content percentage of the nonionic surfactant(s) (B) in the primer composition is 3.0% by mass or lower.

Abstract: A primer composition for a process of inkjet printing includes a resin emulsion, cohesion promoter, surfactant(s) (A), nonionic surfactant(s) (B), and water. The resin emulsion includes a polyolefin-based resin emulsion and/or a urethane-based resin emulsion. The surfactant(s) (A) include(s) an acetylene-based surfactant and a silicone-based surfactant. Each nonionic surfactant (B) had a HLB value of 10.0 or greater but under 15.5 and also had multiple polyoxyalkylene groups in the molecule, and includes a polyoxyalkylene group-containing fatty acid glyceryl, a polyoxyalkylene group-containing aliphatic amine, and/or a polyoxyalkylene group-containing sorbitan fatty acid ester. The content percentage of the nonionic surfactant(s) (B) in the primer composition is 3.0% by mass or lower; and no organic solvent is contained, or the content of organic solvent(s) in the primer composition is 1.0% by mass or lower.

Abstract: An aqueous inkjet ink composition contains a pigment, an alkali-soluble resin, a polyolefin resin emulsion, a basic compound, an aqueous medium, and a surfactant, wherein the alkali-soluble resin is a copolymer of acrylic acid/lauryl acrylate/styrene; a glass transition temperature of the alkali-soluble resin is 45° C. to 95° C.; an average grain size of the polyolefin resin emulsion is 5 to 300 nm; a solids content of the polyolefin resin emulsion is 0.5 to 5.0 percent by mass in the aqueous inkjet ink composition; and the surfactant contains at least an acetylenediol-based surfactant. The aqueous inkjet ink composition is adapted to offering excellent high-gap discharge stability, antifouling property, adhesion, drying property, abrasion resistance, discharge stability, and preservation stability, even when printed on nonabsorbent media.

Abstract: An object is to provide an aqueous inkjet ink composition offering excellent high-gap discharge stability, antifouling property, adhesion, drying property, abrasion resistance, discharge stability, and preservation stability, even when printed on nonabsorbent media. As a solution, an aqueous inkjet ink composition is provided that contains a pigment, an alkali-soluble resin, a polyolefin resin emulsion, a basic compound, an aqueous medium, and a surfactant, wherein the glass transition temperature of the alkali-soluble resin is 40 to 100° C., the average grain size of the polyolefin resin emulsion is 5 to 300 nm, the solids content of the polyolefin resin emulsion is 0.5 to 5.0 percent by mass in the aqueous inkjet ink composition, and the surfactant contains at least an acetylenediol-based surfactant.

Abstract: The present invention aims to provide a packaging material having excellent printed image quality as well as excellent laminate strength and heat sealability. Provided is a packaging material including at least: a base film, a primer layer, a printed layer, an adhesive layer, and a sealant film in a stated order, the primer layer being formed of a primer composition containing a water-soluble polyvalent metal salt, a chlorinated polyolefin emulsion, and at least one selected from the group consisting of an acrylic emulsion, a vinyl acetate emulsion, and a urethane-modified polyester resin, the printed layer being formed of a printing ink containing a polyester polyurethane resin, the adhesive layer being formed of an aliphatic ester adhesive.

Abstract: An inkjet ink set in which an aqueous yellow ink composition contains at least one of PY17, PY83, PY128, PY155, and PY180; an aqueous magenta ink composition contains at least one of PR146, PR150, PR176, PR185, and PR254; an aqueous cyan ink composition contains PB15:3; an aqueous black ink composition contains PBk7; an aqueous violet ink composition contains PV23; and each of the aqueous inkjet ink compositions contains an aqueous medium and an alkali-soluble or self-emulsifying polyurethane resin as a binder resin. The inkjet ink set has aqueous inkjet ink compositions having excellent laminate strength and heat resistance.

Abstract: A primer composition including a resin emulsion, an aggregation accelerator, a surfactant, and water, the surfactant containing one or more of acetylene-based surfactants and silicone-based surfactants, and a nonionic surfactant other than the surfactant, the nonionic surfactant having an HLB value of 10 or above and below 15.5 and having multiple polyoxyalkylene groups, and the proportion of the nonionic surfactant in the primer composition is 3 mass % or below. The primer composition has excellent storage stability and makes it possible to form a primer layer that has excellent transparency and that produces excellent bleeding resistance and printability when a solid image is printed by an aqueous inkjet ink composition.

Abstract: It is an object of the present invention to provide an aqueous white ink composition for surface-printed flexible packaging which is excellent in heat resistance, blocking resistance, alcohol resistance, abrasion resistance, solid uniformity, and bleeding resistance. Provided is an aqueous white ink composition for surface-printed flexible packaging, comprising a white pigment, 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.

Abstract: An object is to obtain a white ink which is easy to redisperse and is redispersible by being shaken several tens of times with weak force at most, or alternatively, without being shaken. As a solution, a white ink composition is provided which contains 5.0 to 20.0% by mass of a titanium oxide in an ink composition; 3.0 to 60.0 parts by mass of a solid content of alkali-soluble resin relative to 100 parts by mass of a pigment or pigments in the ink composition, wherein building blocks of the alkali-soluble resin are styrene; stearyl acrylate and/or lauryl acrylate; and acrylic acid, and the alkali-soluble resin has a weight-average molecular weight of 10,000 or more, an acid value of 100 mgKOH/g or more, and a glass transition temperature of 50° C. or more; and a surfactant.

Abstract: A cleaning fluid used in an ink-jet printer ejecting an aqueous ink-jet ink containing a pigment and an alkali-soluble resin, to clean a portion of the ink-jet printer to which the ejected aqueous ink-jet ink is adherent. The cleaning fluid includes a surfactant, an antiseptic, and water. The surfactant is a compound having a polyoxyalkylene skeleton and an HLB of 9-20, and the antiseptic includes a compound having a hydantoin skeleton, the content of which is 0.05-0.3 mass %. The cleaning fluid does not attack nozzle plates made of silicone and has satisfactory storage stability, antiseptic effect, and ability to remove aqueous ink-jet inks.

Abstract: An aqueous inkjet ink composition containing a pigment, an alkali-soluble resin, a surfactant, a water-soluble solvent, colloidal silica, and water, in which the surfactant includes a surfactant having an HLB value equal to or greater than 3 and less than 10 and a surfactant having an HLB value of 10-20 (inclusive), the water-soluble solvent has a boiling point of 170-250° C. (inclusive) at 1 atm, and the percentage of the colloidal silica in the aqueous inkjet ink composition is 0.05-2 mass % (inclusive). The aqueous inkjet ink composition has excellent storage stability, mechanical stability, discharge stability, coating film drying properties, and cissing resistance.

Abstract: An object is to provide a method for storing or transporting an aqueous white ink composition for inkjet that does not cause precipitation of a pigment therein during storage for a long period or transport, and allows the pigment to be easily redispersed even if precipitation occurs. As means for solving the problems, a storing method is provided that includes placing an aqueous white ink composition for inkjet containing titanium oxide and a pigment dispersant in a tank and maintaining the entire aqueous white ink composition for inkjet in the tank at a temperature of ?5 to ?35° C.

Abstract: A primer composition including a resin emulsion, an aggregation accelerator, a surfactant, and water, the surfactant containing one or more of acetylene-based surfactants and silicone-based surfactants, and a nonionic surfactant other than the surfactant, the nonionic surfactant having an HLB value of 10 or above and below 15.5 and having multiple polyoxyalkylene groups, and the proportion of the nonionic surfactant in the primer composition is 3 mass % or below. The primer composition has excellent storage stability and makes it possible to form a primer layer that has excellent transparency and that produces excellent bleeding resistance and printability when a solid image is printed by an aqueous inkjet ink composition.

Abstract: The present invention aims to provide a packaging material having excellent printed image quality as well as excellent laminate strength and heat sealability. Provided is a packaging material including at least: a base film, a primer layer, a printed layer, an adhesive layer, and a sealant film in a stated order, the primer layer being formed of a primer composition containing a water-soluble polyvalent metal salt, a chlorinated polyolefin emulsion, and at least one selected from the group consisting of an acrylic emulsion, a vinyl acetate emulsion, and a urethane-modified polyester resin, the printed layer being formed of a printing ink containing a polyester polyurethane resin, the adhesive layer being formed of an aliphatic ester adhesive.

Abstract: An object is to improve the lamination strength and anti-blocking suitability of matters printed with an aqueous white inkjet ink composition containing titanium oxide, etc., on polyethylene terephthalate, polypropylene, nylon, and other resin films. As a means for achieving the object, an ink set is provided that includes a combination of: an aqueous primer composition containing an acrylic resin and/or vinyl acetate resin, and a calcium salt; and an aqueous white inkjet ink composition containing a polyester polyurethane resin emulsion with a rate of elongation of 500 to 1500% by 0.1 to 10.0 percent by mass in solids content in the aqueous white inkjet ink composition, a wax emulsion, and a titanium oxide.

Abstract: An object is to improve the dispersion stability and discharge stability, while also improving the image quality and various resistance properties of printed matters even when the cohesion promoter contained in the primer ink is small in quantity. As a means to achieve the object, an ink set is provided that comprises: an aqueous inkjet ink composition containing (a) a pigment, (b) a water-soluble organic solvent, (c) water, and (d) a resin emulsion, wherein the pigment (a) has a crosslinked resin layer on its surface; and a primer ink composition containing a cohesion promoter that promotes cohesion of the aforementioned ink composition.