Teikoku Printing Inks Mfg. Co., Ltd.

Takuya Torihata

Naoto Takada

Tomomi Ogata

Kenji Kinoshita

Yoshihumi Kominami

Kenji Takano

Jun Kimura

An ink composition for high-speed screen printing, includes a solvent with a boiling point of not less than 170&#xb0; C. at not less than 70 wt % of the total solvent, and a prepolymer or polymer with a weight-average molecular weight of not less than 2000 at not less than 7 wt % with respect to the total ink composition, and having a viscosity of not less than 6 Pa&#xb7;s and less than 30 Pa&#xb7;s as measured with a BH-type rotating viscosimeter at 25&#xb0; C., and a thixotropic index (TI value) of 2.0 to 8.0, the measured flow radius value of 14.0 to 24.0 mm after 1 minute from the start of measurement by a flow property measuring method using a spread meter at 25&#xb0; C. according to JIS K5701-1:2000.

Ink composition for high-speed screen printing, printed article obtained by high-speed printing of said ink composition, and method for producing said printed article

An ink composition for screen printing having a measured flow radius value 13.0 to 24.0 mm after 1 minute from the start of measurement by a flow property measuring method using a spread meter at 25&#xb0; C. according to JIS K5701-1:2000, 'F60'&#x2212;'F45'&#x2264;1.0 mm is satisfied, wherein &#x201c;F60&#x201d; and &#x201c;F45&#x201d; are defined as measured flow radius values after 1 minute and 45 seconds, respectively, from the start of measurement by the flow property measuring method, the viscosity is 5 to 180 Pa&#xb7;s, the thixotropic index is 2.0 to 8.0, the composition contains a solvent with a boiling point at least 170&#xb0; C. at least at 70 mass % and a thermoplastic polymer with a weight-average molecular weight of at least 4000 and with a Tg of 20 to 95&#xb0; C. at least at 10 mass %, wherein the printed image coating film has an elongation percentage at least 250%.

Durable and flexible ink composition for high-quality/high-definition screen printing, printed product obtained by screen printing said ink composition, and manufacturing method for said printed product

An ultraviolet curing type coating resin composition having all of respective beneficial features of excellent state in chemical resistance, under high temperature, against human skin protection creams containing a mixture of alkyl esters of benzoic acid, trademark), excellent state in gas barrier property against metal-corrosive gases as represented by sulfur-containing gases, and excellent state in flexibility that accommodates three-dimensional shape forming processing is demanded, includes an ultraviolet curing type coating resin composition containing an unsaturated-group-containing acrylic resin, with a weight average molecular weight of 5000 to 70000, a number of (meth)acrylate functional groups per molecule of 12 to 40, a hydroxyl value of 2 to 200 mgKOH/g, and with a glass transition temperature of 20 to 90&#xb0; C., a volatile organic solvent, and a photopolymerization initiator.

Coating resin composition

An ink composition for screen printing for a glass substrate includes a solvent with a boiling point at least 170&#xb0; C. at least at 70 mass % of the total solvent and a prepolymer or polymer with a weight-average molecular weight of at least 2000 at least at 2 mass % with respect to total ink composition, and with a viscosity of 5 to 180 Pa&#xb7;s measured with a BH-type rotating viscosimeter at 25&#xb0; C. and thixotropic index (TI value) of 2.0 to 8.0, the measured flow radius value being 13.0 to 24.0 mm after 1 minute from start of measurement by a flow property measuring method using a spread meter at 25&#xb0; C. according to JIS K5701-1:2000, satisfying 'F60'&#x2212;'F45'&#x2266;1.0 mm, where &#x201c;F60&#x201d; and &#x201c;F45&#x201d; are measured flow radius values after 1 minute and 45 seconds, respectively, from start of measurement, and containing a coupling agent compound.

High-quality/high-definition screen printing ink composition for glass substrate, printed product obtained by screen printing said ink composition, and manufacturing method for said printed product

Growing community of inventors

Tokyo, Japan

Takuya Torihata