Removable ultraviolet curable dye sublimation inks
View Patent ↗Various of the disclosed embodiments concern removable ultraviolet (UV) curable dye sublimation ink to be used in various printing systems and printing methods. In some embodiments, the ink includes a dye component, a UV curable component, and a soluble or solvent-sensitive component. In order to print an image on a substrate, the ink is heated to a temperature sufficient to cause sublimation of at least the dye component. During the sublimation process, the dye is able to permeate the substrate and form a printed image. After the transfer process has been completed, a solvent can be jetted onto the substrate that causes the soluble component to dissolve. The washing process ensures that any residual ink remaining on the surface of the substrate is substantially removed.
1. A method of dye-sublimation printing, the method comprising:
depositing a sublimation ink including a dye component, an ultraviolet (UV) curable component, and a soluble monofunctional monomer component directly onto a surface of a substrate;
curing at least the UV curable component by exposing the sublimation ink to UV radiation;
heating the sublimation ink to a temperature that is sufficient to cause the dye component to sublime, permeate the surface of the substrate, and form an image; and
ejecting a solvent onto the substrate that causes the soluble monofunctional monomer component to dissolve, thereby substantially removing residual sublimation ink that did not permeate the surface of the substrate and was not used to form the image.
2. The method of claim 1 , further comprising:
exposing the substrate to a dryer to remove any remaining solvent from the surface.
3. The method of claim 1 , wherein the solvent is water.
4. The method of claim 3 , wherein the soluble monofunctional monomer component is water-soluble.
5. The method of claim 1 , wherein the sublimation ink further includes at least one dispersant, at least one initiator, at least one surfactant, and at least one stabilizer.
6. The method of claim 5 , wherein the at least one initiator includes a free-radical photoinitiator adapted to decompose into free radicals when exposed to UV radiation, which promotes cross-linking within the sublimation ink.
7. The method of claim 1 , wherein the UV radiation is emitted by one or more light emitting diodes.
8. The method of claim 7 , wherein the one or more light emitting diodes are configured to emit UV electromagnetic radiation of subtype A, subtype B, subtype C, subtype V, or any combination thereof.
9. The method of claim 7 , wherein the one or more light emitting diodes cure at least the UV curable component at a curing temperature less than the temperature sufficient to cause sublimation.
10. The method of claim 9 , wherein the curing temperature does not exceed 100° C. (212° F.).
11. A solid ultraviolet (UV) curable dye-sublimation ink formulation comprising:
a dye component configured to sublime and permeate into a substrate upon being heated to a sufficient temperature;
a water-soluble monofunctional monomer component that allows residual ink that did not permeate the substrate during sublimation to be removed by a washing process; and
a UV curable component that cures when exposed to UV radiation.
12. The solid UV curable dye-sublimation ink formulation of claim 11 , further comprising:
a dispersant that promotes distribution of the dye component throughout the ink formulation;
a surfactant that affects surface properties of the ink formulation; and
a stabilizer that improves weatherability of the ink formulation.
13. The solid UV curable dye-sublimation ink formulation of claim 11 , further comprising:
a hydrophobic monofunctional monomer component.
14. The solid UV curable dye-sublimation ink formulation of claim 13 , wherein the water-soluble monofunctional monomer component and the hydrophobic monofunctional monomer component are selected to ensure the ink formulation lightly adheres to the substrate and is substantially tack free.
15. The solid UV curable dye-sublimation ink formulation of claim 11 , wherein the UV curable component includes a photoinitator selected to promote cross-linking when exposed to a particular range of UV radiation.
16. A method of dye-sublimation printing, the method comprising:
depositing a sublimation ink including a dye component, a curable component, and a soluble monomer component directly onto a substrate;
curing at least the curable component;
heating the sublimation ink to a temperature that is sufficient to cause the dye component to sublime and permeate the substrate; and
jetting a solvent onto the substrate that causes the soluble monomer component to dissolve, thereby substantially removing residual sublimation ink that did not permeate the substrate.
17. The method of claim 16 , wherein the solvent is water.
18. The method of claim 16 , wherein the solvent is between 40° C. (104° F.) and 60° C. (140° F.).
19. The method of claim 16 , wherein the substrate is an agglomerated stone material that includes marble or quartz.
20. The method of claim 16 , wherein the substrate is a polyester substrate or a polyester-coated non-absorbent substrate.