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US 8,801,165 B2Granted
Printing ink, apparatus and method
AssigneeSericol Limited
InventorsRobert Augustus Fassam, Nigel Gould, Jeremy Ward, Barry McGregor
Life of this patent
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AssigneeSericol Limited
InventorsRobert Augustus Fassam, Nigel Gould, Jeremy Ward, Barry McGregor
Estimating the term…
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.
An inkjet ink comprising at least 50% to 80% by weight of organic solvent based on the total weight of the ink, a radiation curable material, a photoinitiator and optionally a colourant, wherein the solvent is selected from glycol ethers, organic carbonates, lactones, dibasic esters, bio-solvents and mixtures thereof, wherein the radiation curable material is capable of polymerising by free radical polymerisation, and wherein the radiation curable material comprises 50 to 100% by weight of free radical curable monomer, based on the total weight of radiation curable material present in the ink.
An inkjet printing apparatus for printing a solvent-based radiation-curable inkjet ink onto a substrate comprising at least one printhead, a means for evaporating solvent from the printed ink and a source of actinic radiation, wherein the source of actinic radiation is positioned downstream from the means for evaporating solvent from the printed ink so that printed substrate is exposed to the means for evaporating solvent before it is exposed to radiation, allowing evaporation of the solvent before radiation curing of the ink.
An inkjet ink comprising at least 50% to 80% by weight of organic solvent based on the total weight of the ink, a radiation curable material, a photoinitiator and optionally a colourant, wherein the solvent is selected from glycol ethers, organic carbonates, lactones, dibasic esters, bio-solvents and mixtures thereof, wherein the radiation curable material comprises 50 to 100% by weight of free radical curable oligomer having a molecular weight of 600 to 4000 and 0 to 50% by weight of free radical curable monomer having a molecular weight of 450 or less based on the total weight of radiation curable material present in the ink;
Dependencies are inferred from the claim text.