Method of manufacturing an etched glass article
A method of manufacturing an etched glass article including the steps of jetting an image with a UV curable inkjet ink on a surface of the glass article; curing the image; etching the surface not covered by the UV cured image to obtain an etched image; and solubilising the UV cured image in an aqueous alkaline solution.
1. A method of manufacturing an etched glass article, the method comprising:
jetting an image with a UV curable inkjet ink on a surface of a glass article, wherein the UV curable inkjet ink includes:
a) one or more photoinitiators;
b) one or more hydrolyzable polyfunctional monomers or oligomers having at least one alkali hydrolyzable group located in an atomic chain between two polymerizable groups of the polyfunctional monomer or oligomer; and
c) one or more water absorption controlling monomers being a monofunctional or difunctional monomer containing at least one functional group selected from the group consisting of a hydroxyl group, an ethylene oxide or oligo-ethylene oxide group, a tertiary amine group, an acidic group having a pKa not lower than 3, and a five to seven membered aromatic or non-aromatic heterocyclic group;
UV curing the image;
etching a surface of the glass article not covered by the UV cured image to obtain an etched image; and
solubilizing the UV cured image in an aqueous alkaline solution.
2. The method according to claim 1 , wherein, during the step of solubilizing the UV cured image, the UV cured image is solubilized within 5 minutes.
3. The method according to claim 1 , wherein the step of UV curing the image is performed with UV LEDs.
4. The method according to claim 1 , wherein a time between the steps of jetting the image and UV curing the image is at least 50 ms.
5. The method according to claim 1 , further comprising the step of:
heating the UV cured image before the step of etching.
6. The method according to claim 1 , wherein the glass article is a glass sheet.
7. The method according to claim 1 , further comprising the step of:
jetting a second UV curable inkjet ink including a colorant on at least a portion of the etched image.
8. The method according to claim 7 , wherein the step of jetting the second UV curable inkjet ink is performed before the step of solubilizing the UV cured image.
9. The method according to claim 1 , wherein the one or more water absorption controlling monomers include at least one functional group selected from the group consisting of an ethylene oxide or oligo-ethylene oxide group, a hydroxyl group, and a morpholino group.
10. The method according to claim 1 wherein the at least one alkali hydrolyzable group located in the atomic chain between two polymerizable groups of the one or more polyfunctional monomers or oligomers is selected from the group consisting of Formulae H-1 to H-4:
wherein
Q represents necessary atoms to form a five membered aromatic ring group;
Z represents necessary atoms to form a five or six membered ring group; and
the dashed lines represent bonds to a remainder of the polyfunctional monomer or oligomer.
11. The method according to claim 9 , wherein the at least one alkali hydrolyzable group located in the atomic chain between two polymerizable groups of the one or more polyfunctional monomers or oligomers is selected from the group consisting of Formulae H-1 to H-4:
wherein
Q represents necessary atoms to form a five membered aromatic ring group;
Z represents necessary atoms to form a five or six membered ring group; and
the dashed lines represent bonds to a remainder of the polyfunctional monomer or oligomer.
12. The method according to claim 11 , wherein the at least one alkali hydrolyzable group H-3 is selected from the group consisting of an imidazole group, a benzimidazole group, a triazole group, and a benzotriazole group.
13. The method according to claim 11 , wherein the at least one alkali hydrolyzable group H-4 is selected from the group consisting of a succinimide group and a phthalimide group.
14. The method according to claim 1 , wherein the least one alkali hydrolyzable group located in the atomic chain between two polymerizable groups of the one or more hydrolyzable polyfunctional monomers or oligomers is an oxalate group.
15. The method according to claim 9 , wherein the least one alkali hydrolyzable group located in the atomic chain between two polymerizable groups of the one or more hydrolyzable polyfunctional monomers or oligomers is an oxalate group.
16. The method according to claim 1 wherein the one or more hydrolyzable polyfunctional monomers or oligomers is a difunctional hydrolyzable polyfunctional monomer or oligomer.
17. The method according to claim 1 , wherein the polymerizable groups of the polyfunctional monomer or oligomer are independently selected from the group consisting of an acrylate group, a methacrylate group, an acrylamide group, a methacrylamide group, a styrene group, a maleate group, a fumarate group, an itaconate group, a vinyl ether group, a vinyl ester group, an allyl ether group, and an allyl ester group.