Abstract: The present invention provides an inkjet adhesive comprising: one or more monofunctional monomers, each having a log Doctano/water of 1.1 or higher; and one or more photoinitiators, wherein the inkjet adhesive is free from monomers having a log Doctano/water of lower than 1.1. The inkjet adhesive is particularly formulated for use in a method of cold foil printing. The inkjet adhesive contains only low polarity monomers to provide the inkjet adhesive with the ideal balance of through and surface curing properties required for cold foil printing. The monofunctional monomers also provide the inkjet adhesive with good adhesion properties.

Abstract: The present invention provides an inkjet ink comprising: an aqueous polyurethane (meth)acrylate dispersion, which is redispersible in water after thermal drying and before curing; a water-dispersible or water-soluble photoinitiator; a surfactant; and a coloring agent. The ink of the present invention is particularly suitable for printing onto a food packaging.

Abstract: The present invention provides an inkjet ink comprising: an aqueous polyurethane (meth)acrylate dispersion, which is redispersible in water after thermal drying and before curing; a water-dispersible or water-soluble photoinitiator; a surfactant; and a colouring agent. The ink of the present invention is particularly suitable for printing onto a food packaging.

Abstract: The present invention provides a method of inkjet printing comprising the following steps, in order: (i) providing a hybrid inkjet ink comprising an organic solvent, a radiation-curable material, a photoinitiator and optionally a colorant; (ii) printing the ink on to a substrate; (iii) pinning the ink by exposing the ink to actinic radiation at a dose of 1-200 mJ/cm2; (iv) evaporating at least a portion of the solvent from the ink; and (v) exposing the ink to additional actinic radiation to cure the ink.

Abstract: A method of producing a shear-thinning silica dispersion for an inkjet ink comprising: providing a composition comprising fumed silica, an organic solvent and/or a reactive diluent and a radiation-curable oligomer and/or a passive thermoplastic resin; bead milling the composition using milling beads having a mean diameter of 0.3 to 1.0 mm, wherein the ratio of the volume of milling beads present in the composition during bead milling in mL to the weight of the composition in grams is 0.5 to 2.0:1.0, and wherein the viscosity of the composition during bead milling is 50-800 mPasat 1,000 s; and removing the composition from the mill.

Abstract: An anti-drainback/bypass valve for an oil filter having an annular base portion, a resiliently deflectable annular anti-drainback skirt extending radially outwardly from the base portion, and a resiliently deflectable annular bypass skirt extending radially inwardly from the base portion, wherein the base portion is characterized by being stiffer than the resiliently deflectable anti-drainback skirt and the resiliently deflectable bypass skirt. By stiffening the base portion, a hinge area of the resiliently deflectable bypass skirt is controlled to open at relatively high pressures. Controlling the hinge area prevents failure of the resiliently deflectable bypass skirt at pressures below a prescribed criteria, which prevents unfiltered oil from bypassing a filter element when the filter element is not clogged.

Abstract: The present invention provides an inkjet ink including at least 50% by weight of organic solvent based on the total weight of the ink, a radiation curable material, a photoinitiator and a colorant. The invention also provides an apparatus for printing the ink wherein the apparatus includes at least one printhead, a means for evaporating solvent from the printed ink and a source of actinic radiation. Furthermore, the invention provides a method of inkjet printing including i) inkjet printing the inkjet ink as defined above on to a substrate; ii) evaporating at least a portion of the solvent from the printed ink; and iii) exposing the printed ink to actinic radiation to cure the radiation curable material.

Abstract: The present invention provides a method comprising: applying a UV-curable ink to a substrate; partially curing the ink by exposing the ink to UV radiation from an LED source; and exposing the partially cured ink to UV radiation from a flash lamp. The flash lamp is a xenon or krypton flash lamp. An apparatus for performing the method and an ink adapted for use in the method are also provided.

Abstract: An ink comprising a colorant, an organic solvent having a boiling point below 170° C. and a radiation-curable component of molecular weight >1000, wherein the ink contains less than 10 wt % of radiation-curable components of molecular weight 1000 or less and the ink contains less than 5 wt % water. The ink is particularly useful for printing packaging used for products intended for ingestion by humans or other animals.

Abstract: The present invention provides an inkjet ink comprising at least 30% by weight of organic solvent based on the total weight of the ink, a radiation curable material, a photoinitiator and optionally a colourant. The invention also provides an apparatus for printing the ink wherein the apparatus comprises at least one printhead, a means for evaporating solvent from the printed ink and a source of actinic radiation. Furthermore, the invention provides a method of inkjet printing comprising i) inkjet printing the inkjet ink as defined above on to a substrate; ii) evaporating at least a portion of the solvent from the printed ink; and iii) exposing the printed ink to actinic radiation to cure the radiation curable material.

Abstract: The present invention provides an inkjet ink comprising at least 30% by weight of organic solvent based on the total weight of the ink, a radiation curable material, a photoinitiator and optionally a colorant. The invention also provides an apparatus for printing the ink wherein the apparatus comprises at least one printhead, a means for evaporating solvent from the printed ink and a source of actinic radiation. Furthermore, the invention provides a method of inkjet printing comprising i) inkjet printing the inkjet ink as defined above on to a substrate; ii) evaporating at least a portion of the solvent from the printed ink; and iii) exposing the printed ink to actinic radiation to cure the radiation curable material.

Abstract: The present invention provides a method of inkjet printing comprising the following steps, in order: (i) providing a hybrid inkjet ink comprising an organic solvent, a radiation-curable material, a photoinitiator and optionally a colorant; (ii) printing the ink on to a substrate; (iii) pinning the ink by exposing the ink to actinic radiation at a dose of 1-200 mJ/cm2; (iv) evaporating at least a portion of the solvent from the ink; and (v) exposing the ink to additional actinic radiation to cure the ink.

Abstract: The present invention relates to a radiation-curable ink-jet ink comprising at least two monofunctional (meth)acrylate monomers; a monofunctional monomer selected from an N-vinyl amide, an N-acryloyl amine, or a mixture thereof; a polymerisable (meth)acrylate oligomer; a radical photoinitiator; and a colouring agent; wherein the ink has a viscosity of less than 100 mPas at 25° C. The ink is substantially free of multifunctional monomers; and the at least two monofunctional (meth)acrylate monomers include a combination of a cyclic monofunctional (meth)acrylate monomer and an acyclic-hydrocarbon monofunctional (meth)acrylate monomer. The ink displays an excellent balance of cure speed and viscosity for the ink together with hardness and flexibility for the cured film.

Abstract: This invention relates to a radiation-curable ink-jet ink having a viscosity of 30 mPas or less at 25° C., the ink comprising: at least two monofunctional (meth)acrylate monomers which comprise a cyclic monofunctional (meth)acrylate monomer and 2-(2-ethoxyethoxy)ethyl acrylate; a monofunctional monomer selected from an N-vinyl amide, an N-acryloyl amine or a mixture thereof; a multifunctional (meth)acrylate monomer; a polymerisable (meth)acrylate oligomer; a radical photoinitiator; and a colouring agent. The ink is preferably used in reel-to-reel printing and in printing where the substrates are stacked.

Abstract: The present invention provides an inkjet ink comprising at least 30% by weight of organic solvent based on the total weight of the ink, a radiation curable material, a photoinitiator and optionally a colourant. The invention also provides an apparatus for printing the ink wherein the apparatus comprises at least one printhead, a means for evaporating solvent from the printed ink and a source of actinic radiation. Furthermore, the invention provides a method of inkjet printing comprising i) inkjet printing the inkjet ink as defined above on to a substrate; ii) evaporating at least a portion of the solvent from the printed ink; and iii) exposing the printed ink to actinic radiation to cure the radiation curable material.

Abstract: The present invention provides a method comprising: applying a UV-curable ink to a substrate; partially curing the ink by exposing the ink to UV radiation from an LED source; and exposing the partially cured ink to UV radiation from a flash lamp. The flash lamp is a xenon or krypton flash lamp. An apparatus for performing the method and an ink adapted for use in the method are also provided.

Abstract: This invention relates to an ink-jet ink substantially free of water and volatile organic solvents comprising at least one monofunctional (meth)acrylate monomer, including phenoxyethyl acrylate; at least one monofunctional N-vinyl amide monomer, including N-vinyl caprolactam; at least one radical photoinitiator; and at least one coloring agent. The ink has a viscosity of less than 100 mPas at 25° C., and the molar ratio of the at least one monofunctional (meth)acrylate monomer to the at least one monofunctional N-vinyl amide monomer is from 1.0 to 6.0.

Abstract: This invention relates to an ink-jet ink comprising at least one monofunctional (meth)acrylate monomer; at least one monofunctional N-vinyl amide monomer; at least one radical photoinitiator; and at least one coloring agent. The ink has a viscosity of less than 100 mPas at 250° C., and the ink contains no more than 15 wt % of multifunctional monomers based on the total weight of the ink.

Abstract: This invention relates to an ink-jet ink comprising at least one monofunctional (meth)acrylate monomer; at least one monofunctional N-vinyl amide monomer; at least one radical photoinitiator; and at least one coloring agent. The ink has a viscosity of less than 100 mPas at 25° C., and the molar ratio of the at least one monofunctional (meth)acrylate monomer to the at least one monofunctional N-vinyl amide monomer is from 1.0 to 6.0.

Abstract: The present invention relates to a radiation-curable ink-jet ink comprising at least two monofunctional (meth)acrylate monomers; a monofunctional monomer selected from an N-vinyl amide, an N-acryloyl amine, or a mixture thereof; a polymerisable (meth)acrylate oligomer; a radical photoinitiator; and a colouring agent; wherein the ink has a viscosity of less than 100 mPas at 25° C. The ink is substantially free of multifunctional monomers; and the at least two monofunctional (meth)acrylate monomers include a combination of a cyclic monofunctional (meth)acrylate monomer and an acyclic-hydrocarbon monofunctional (meth)acrylate monomer. The ink displays an excellent balance of cure speed and viscosity for the ink together with hardness and flexibility for the cured film.