The present invention provides an inkjet ink and a hiding layer coating agent that contain radical polymerizable components including a polyfunctional monomer that includes a high Tg polyfunctional monomer with a glass transition temperature Tg of not less than 40° C. at a ratio of not less than 30 mass % and a monofunctional monomer, a volatile solvent, and a photo-radical polymerization initiator, with a ratio of the monofunctional monomer being 5 to 70 mass % in the radical polymerizable components and a ratio of the volatile solvent being 50 to 400 mass % with respect to the radical polymerizable components and are excellent in dispersion stability due to not containing (excluding) a white pigment such as titanium oxide, etc., and enable printing of a white or colored character having a high hiding property equivalent to that in a case where the white pigment is contained.

The present invention provides an inkjet ink and a hiding layer coating agent that contain radical polymerizable components including a polyfunctional monomer that includes a high Tg polyfunctional monomer with a glass transition temperature Tg of not less than 40° C. at a ratio of not less than 30 mass % and a monofunctional monomer, a volatile solvent, and a photo-radical polymerization initiator, with a ratio of the monofunctional monomer being 5 to 70 mass % in the radical polymerizable components and a ratio of the volatile solvent being 50 to 400 mass % with respect to the radical polymerizable components and are excellent in dispersion stability due to not containing (excluding) a white pigment such as titanium oxide, etc., and enable printing of a white or colored character having a high hiding property equivalent to that in a case where the white pigment is contained.

To provide an inkjet printing apparatus that improves the smoothness of the ink layer surface and improves the image quality. Provided is an inkjet printing apparatus that prints with a UV curable ink, the inkjet printing apparatus including: an ejection unit configured to eject the UV curable ink onto the surface of a print medium; and a control unit configured to control the ejection of the UV curable ink from the ejection unit, the UV curable ink containing a thixotropy-imparting agent, and the control unit setting the viscosity of the UV curable ink to 1 mPa.Math.s to 20 mPa.Math.s at the time of ejection and to at least 80 mPa.Math.s within five seconds of landing on the print medium.

To provide an inkjet printing apparatus that improves the smoothness of the ink layer surface and improves the image quality. Provided is an inkjet printing apparatus that prints with a UV curable ink, the inkjet printing apparatus including: an ejection unit configured to eject the UV curable ink onto the surface of a print medium; and a control unit configured to control the ejection of the UV curable ink from the ejection unit, the UV curable ink containing a thixotropy-imparting agent, and the control unit setting the viscosity of the UV curable ink to 1 mPa.Math.s to 20 mPa.Math.s at the time of ejection and to at least 80 mPa.Math.s within five seconds of landing on the print medium.

The present invention discloses a hybrid (mixed) formulation composition for 3D additive manufacturing and a manufacturing process. The hybrid formulation composition possesses capability of UV radiation curing and thermal curing. The hybrid formulation composition is designed to be cured by UV radiation in the 3D printing/additive manufacturing process and then post cure by heat to get its final properties. The hybrid formulation composition consists of acrylates (oligomer, monomer, and diluent), photoinitiators, and isocyanate-containing prepolymers which comprises polyols (di-ol, tri-ol) and isocyanates. The hybrid formulation composition may also include reaction accelerator, dye, pigment, and fillers. The finished products of the hybrid formulation composition possess rubber-like properties and can be used in the applications such as shoe sole, toys, medical, and wearables goods . . . etc.

The present invention discloses a hybrid (mixed) formulation composition for 3D additive manufacturing and a manufacturing process. The hybrid formulation composition possesses capability of UV radiation curing and thermal curing. The hybrid formulation composition is designed to be cured by UV radiation in the 3D printing/additive manufacturing process and then post cure by heat to get its final properties. The hybrid formulation composition consists of acrylates (oligomer, monomer, and diluent), photoinitiators, and isocyanate-containing prepolymers which comprises polyols (di-ol, tri-ol) and isocyanates. The hybrid formulation composition may also include reaction accelerator, dye, pigment, and fillers. The finished products of the hybrid formulation composition possess rubber-like properties and can be used in the applications such as shoe sole, toys, medical, and wearables goods . . . etc.

An ink for producing a shaped article includes a photopolymerizable compound, and 5% by volume to 95% by volume of air bubbles relative to the total volume of the ink.

A method for preparing a material for use as a surface of a medical device may include printing, with an ink jet printer and using ink that is curable with ultraviolet light, content onto a surface of material that includes woven ticking fabric laminated with polyurethane. The method may also include curing the ink with the ultraviolet light. The method may also include cutting a section of the material in registration to the content printed on the surface for use in a medical device.

An ink jet recording method performs recording on a recording medium using a white ink composition, a non-white ink composition, and a treatment liquid containing an aggregating agent, the method including: a treatment liquid adhesion step of adhering the treatment liquid to the recording medium to form a treatment liquid layer; a non-white ink adhesion step of adhering the non-white ink composition to the recording medium by ejection thereof from an ink jet head to form a non-white ink layer; and a white ink adhesion step of adhering the white ink composition to the recording medium by ejection thereof from an ink jet head to form a white ink layer. The recording medium has a region in which the non-white ink layer, the white ink layer, and the treatment liquid layer are overlapped with each other, at least one of the ink compositions contains resin particles and a water-soluble resin, and the water-soluble resin has a glass transition temperature higher than that of a resin of the resin particles.

The invention relates to compositions, having a) 1.00 to 65.00% by weight of at least one compound of formula (I), wherein R.sup.1, R.sup.2 are each independently H, C.sub.1-C.sub.6-alkyl, or C.sub.1-C.sub.6-alkoxy-C.sub.1-C.sub.6-alkyl; R.sup.3, R.sup.4, R.sup.5 are each independently H, C.sub.1-C.sub.6-alkyl, or C.sub.1-C.sub.6-alkoxy-C.sub.1-C.sub.6-alkyl; R.sup.6 is H or C.sub.1-C.sub.6-alkyl; k is 1, 2, 3, 4 or 5, as component A; b) 1.00 to 60.00% by weight of at least one monomer having two (meth)acrylate groups and 1 having a molecular weight Mw of no more than 500 Dalton, as component B; c) 0 to 25% by weight of at least one monomer having at least three (meth)acrylate groups and having a molecular weight Mw of no more than 600 Dalton, as component C; and d) 1.00 to 30.00% by weight of at least one polymer having at least two (meth)acrylate groups and having a molecular weight Mw of at least 700 Dalton, as component D; with the proviso that the amount of components A+B is at least 50% by weight, as well as the use of these compositions as printing inks, in particular inkjet printing inks. ##STR00001##