Riso Kagaku Corporation

Other

Shunsuke Uozumi

Takahisa Yamazaki

Sayako Arai

Yuki Urano

Ayako Mochizuki

Hideki Imanishi

Akiko Hayashi

Kokoro Kinoe

Yasuo Yamamoto

Shinichiro Shimura

Shin-ichiro Shimura

Kazuyoshi Shioiri

An ink set for textile printing is disclosed which includes a pretreatment liquid containing a metal salt, a water-dispersible resin (A), an organic solvent (B) having an SP value of 10 to 14 (cal/cm)and water, and an ink containing a pigment, a water-dispersible resin (C) having a glass transition point of 10&#xb0; C. or higher, an organic solvent (D) and water. A method for producing a printed textile item is also disclosed.

Ink set for textile printing and method for producing printed textile item

An aqueous pigment ink for textile inkjet printing is disclosed that contains a pigment, a first water-dispersible resin, a second water-dispersible resin and water, wherein the first water-dispersible resin is at least one resin selected from the group consisting of a water-dispersible urethane resin, a water-dispersible (meth)acrylic resin and a water-dispersible styrene/(meth)acrylic resin, the second water-dispersible resin is a water-dispersible polyester resin, the total amount of the first water-dispersible resin and the second water-dispersible resin is from 2 to 18% by mass relative to the total mass of the ink, and the mass ratio of the second water-dispersible resin relative to the first water-dispersible resin (second water-dispersible resin/first water-dispersible resin) is from 0.1 to 5.0. A method for producing a printed textile item and an ink set are also disclosed.

Aqueous pigment ink for textile inkjet printing, method for producing printed textile item, and ink set

A pretreatment liquid for inkjet textile printing is disclosed that includes water and a cellulose-based polymer having a weight average molecular weight of at least 50,000. A method for producing a printed textile item and an ink set for inkjet textile printing are also disclosed.

Pretreatment liquid for inkjet textile printing, method for producing printed textile item, and ink set for inkjet textile printing

An aqueous inkjet ink set for textile printing is disclosed, the aqueous inkjet ink set including a first ink containing a water-dispersible resin having a glass transition point of less than &#x2212;5&#xb0; C., a coloring material and water, and a second ink containing a water-dispersible resin having a glass transition point of from &#x2212;5&#xb0; C. to 35&#xb0; C., a coloring material and water. A method for producing a printed textile item is also disclosed.

Aqueous inkjet ink set for textile printing and method for producing printed textile item

An aqueous inkjet ink set for textile printing is disclosed, the aqueous inkjet ink set including two or more aqueous inkjet inks that include a black ink, wherein among the charge density Cd values measured by the streaming potential method for the two or more aqueous inkjet inks, the Cd value (CdK) for the black ink is the highest, and the absolute value of the difference between the Cd value (CdK) for the black ink and the Cd value (Cd2) for the aqueous inkjet ink having the second highest Cd value is 80 &#x3bc;eq/g or greater. A method for producing a printed item is also disclosed.

Aqueous inkjet ink set for textile printing and method for producing printed item

A non-aqueous pigment ink that includes a colorant and a non-aqueous solvent, wherein the colorant is a pigment complex of a pigment, a dispersant and an amine compound, the amine compound is a diamine and/or triamine comprising two or more primary and/or secondary amino groups within each molecule, and the dispersant comprises two or more reactive functional groups within each molecule that exhibit reactivity with the amino groups of the amine compound.

Non-aqueous pigment ink

A non-aqueous pigment ink comprising a pigment, a pigment dispersant and a non-aqueous solvent, wherein the pigment dispersant is an acrylic polymer comprising, as constituent monomers, (M1) an alkyl(meth)acrylate having an alkyl group of 12 or more carbon atoms, (M2) a (meth)acrylic acid derivative having an amino group, and (M3) a (meth)acrylic acid derivative having a glycidyl group, in which the combination of all the constituent monomers comprises from 7 to 15 mol % of the monomer (M2) and from 0.5 to 3 mol % of the monomer (M3) and the molar ratio (M2)/(M3) between the monomer (M2) and the monomer (M3) is within a range from 4 to 20.

A non-aqueous pigment ink comprising a pigment, a pigment dispersant and a non-aqueous solvent, wherein the pigment dispersant is an acrylic polymer comprising, as constituent monomers, (M1) an alkyl (meth)acrylate having an alkyl group of 12 or more carbon atoms, (M2) a (meth)acrylic acid derivative having an amino group, and (M3) (meth)acrylic acid and/or a (meth)acrylic acid derivative having a carboxyl group, in which a combination of all the constituent monomers comprises from 8 to 15 mol % of the monomer (M2) and from 0.6 to 8 mol % of the monomer (M3), and the molar ratio (M2)/(M3) between the monomer (M2) and the monomer (M3) is within a range from 1.3 to 15.

In an inkjet printing system using an ink which includes a coloring material dispersed in a solvent, it is aimed that printing density is improved by thickening the ink on a printing medium so as to stay the coloring material on the surface of the printing medium. An inkjet printing method is provided, in which printing is performed by ejecting one of first and second inks onto a printing medium, and then successively ejecting the other ink so as to overlay it on the one ink, wherein the first ink includes at least a first organic solvent and an &#x3b1;,&#x3b2;-unsaturated carbonyl compound, the second ink includes at least a second organic solvent and an organic compound reactive as a nucleophile with the &#x3b1;,&#x3b2;-unsaturated carbonyl compound, and at least one of the first and second inks includes a coloring material.

Inkjet printing method and ink set

In an inkjet printing system using an emulsion ink, it is aimed that printing density is improved particularly for a normal paper. An inkjet printing method is provided, in which printing is performed by ejecting one of first and second inks onto a printing medium, and then successively ejecting the other ink so as to overlay it in the one ink, wherein the first ink is a water-in-oil (W/O) emulsion ink comprising the coloring material which is provided with an acidic group on a surface in the water phase, and the second ink is a water-in-oil (W/O) emulsion ink comprising a polyvalent metal salt in the water phase. Preferable acidic group is carboxylic group, sulfuric acid group and phosphoric group. Preferable polyvalent metal salt is a salt composed of metal ions such as Ca, Cu, Ni, Mg, Zn, Ba, Al, Feand Cr.

Injet printing method and ink set

A non-aqueous pigment ink includes a colorant and a non-aqueous solvent, wherein the colorant is a pigment complex of a pigment, a dispersant and a polymer compound, the polymer compound contains 2 or more primary and/or secondary amino groups within each molecule, and the dispersant contains 2 or more reactive functional groups within each molecule that exhibit reactivity with the amino groups of the polymer compound.

A non-aqueous ink-jet ink composition contains at least a pigment, a solvent, and a dispersing agent. The non-aqueous ink-jet ink composition further contains a chelating agent, which is soluble in the solvent. The chelating agent may be a crown ether and/or a cryptand, which acts as a neutral carrier. Alternatively, the chelating agent may be at least one chelating agent acting as an ionic carrier, which is selected from the group consisting of GEDTA, BAPTA, and DTPA. The non-aqueous ink-jet ink composition has good storage stability and good jetting-out performance through suppression of occurrence of sediments due to a change with the passage of time.

Growing community of inventors

Ibaraki, Japan

Shunsuke Uozumi