Clear extended content label with selectively detackified adhesive
Methods of preparing extended content labels from prefabricated adhesive assemblies are described. The methods do not require delamination or relamination of the prefabricated adhesive assemblies. The prefabricated adhesive assemblies include a transparent face layer and an adhesive layer sensitive to radiant energy. Extended content printing is applied to a front face of the face layer. A mask is positioned between the adhesive layer and a radiant energy source. Radiant energy not blocked by the mask reduces the adhesion of irradiated portions of the adhesive layer. A floodcoat is applied over the extended content indicia, and front side indicia is applied over the floodcoat and is visible through the face layer and adhesive layer from a back side of the face layer.
1. An extended content adhesive assembly, the assembly comprising:
a transparent face layer defining a front surface and an oppositely disposed back surface,
a release liner,
an adhesive layer disposed between the back surface of the face layer and the release liner, the adhesive layer comprising a region of reduced adhesion that is configured upon removal of the release liner to form a removable bond with an associated substrate, and a region of non-reduced adhesion that is configured upon removal of the release liner to form a permanent bond with the associated substrate,
indicia on the front surface of the face layer, the indicia being visible through the face layer from the back surface of the face layer, thereby defining extended content,
a floodcoat covering the extended content,
wherein upon bonding the adhesive layer to the associated substrate, the region of reduced adhesion is configured to be peeled away from the associated substrate to thereby reveal the extended content,
wherein the adhesive layer comprises radiant energy sensitive adhesive configured to undergo a reduction in adhesion upon exposure to radiant energy.
2. The assembly according to claim 1 , wherein the indicia comprises reverse printing.
3. The assembly according to claim 1 , wherein the indicia is only present over the region of reduced adhesion.
4. The assembly according to claim 1 , further comprising additional indicia disposed over the floodcoat, wherein the additional indicia is not visible from the back surface of the face layer.
5. The assembly according to claim 1 , wherein the adhesive layer comprises a functionalized emulsion polymer.
6. The assembly according to claim 5 , wherein the functionalized emulsion polymer is prepared by treating an emulsion polymer comprising carboxylic acid functional monomers with at least one ethylenically unsaturated monomer comprising an epoxy group in the presence of a suitable catalyst.
7. The assembly according to claim 6 , wherein the carboxylic acid functionalized monomers are selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, citraconic acid, acryloxypropionic acid, maleic acid, methacryloxyisopropyl acid phthalate, methacryloxyethyl acid phthalate, acryloxyisopropyl acid phthalate, acryloxyethyl acid phthalate, and combinations thereof.
8. The assembly according to claim 6 , wherein the ethylenically unsaturated monomer comprising an epoxy group is selected from the group consisting of glycidyl methacrylate, glycidyl acrylate, acrylated epoxidized soybean oil, allyl glycidyl ether, 3,4-epoxycyclohexyl methyl methacrylate, and combinations thereof.
9. The assembly according to claim 6 , wherein the catalyst is selected from the group consisting of tetrabutyl ammonium hydroxide, methyl tributyl ammonium hydroxide, ammonium hydroxide, tetrabutyl ammonium chloride, methyltributyl ammonium chloride, triphenyl phosphine, chromium acetate, and combinations thereof.
10. The assembly according to claim 5 , wherein the adhesive layer further comprises an ultraviolet photoinitiator.
11. The assembly according to claim 1 , wherein the adhesion of the region of reduced adhesion is at least 30% less than the adhesion of the region of non-reduced adhesion.
12. The assembly according to claim 11 , wherein the adhesion of the region of reduced adhesion is at least 50% less than the adhesion of the region of non-reduced adhesion.
13. The assembly according to claim 1 wherein an entirety of the transparent face layer is not completely pulled off the associated substrate.
14. The assembly according to claim 1 wherein the region of reduced adhesion is prepared by covering a portion of the face layer with a mask that is non-transparent to radiant energy, and irradiating the assembly with radiant energy such that radiant energy not blocked by the mask passes through the face layer to thereby reduce the adhesion of the region of reduced adhesion.
15. A labeled substrate comprising:
a container defining an outer surface, and a layered adhesive assembly disposed on and contacting the outer surface of the container, the layered adhesive assembly comprising
a transparent face layer that defines a front side and a back side, the front side of the face layer being directed toward a front side of the assembly;
a layer of adhesive disposed at the back side of the face layer, the layer of adhesive comprising a region of reduced adhesion that is configured to form a removable bond with the outer surface of the container, and a region of non-reduced adhesion that is configured to form a permanent bond with the outer surface of the container;
indicia positioned over the front side of the face layer and visible from the back side of the face layer, thereby defining extended content on the label; and
a floodcoat covering the indicia,
wherein the region of reduced adhesion is configured to be peeled away from the container to thereby reveal the extended content,
wherein the adhesive layer comprises radiant energy sensitive adhesive configured to undergo a reduction in adhesion upon exposure to radiant energy.
16. The labeled substrate according to claim 15 , wherein the indicia comprises reverse printing.
17. The labeled substrate according to claim 15 , wherein the indicia is only present over the region of reduced adhesion.
18. The labeled substrate according to claim 15 , further comprising additional indicia disposed on the floodcoat, wherein the additional indicia is not visible from the back surface of the face layer.
19. The labeled substrate according to claim 15 , wherein the adhesive layer comprises a functionalized emulsion polymer.
20. The labeled substrate according to claim 19 , wherein the functionalized emulsion polymer is prepared by treating an emulsion polymer comprising carboxylic acid functional monomers with at least one ethylenically unsaturated monomer comprising an epoxy group in the presence of a suitable catalyst.
21. The labeled substrate according to claim 20 , wherein the carboxylic acid functionalized monomers are selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, citraconic acid, acryloxypropionic acid, maleic acid, methacryloxyisopropyl acid phthalate, methacryloxyethyl acid phthalate, acryloxyisopropyl acid phthalate, acryloxyethyl acid phthalate, and combinations thereof.
22. The labeled substrate according to claim 20 , wherein the ethylenically unsaturated monomer comprising an epoxy group is selected from the group consisting of glycidyl methacrylate, glycidyl acrylate, acrylated epoxidized soybean oil, allyl glycidyl ether, 3,4-epoxycyclohexyl methyl methacrylate, and combinations thereof.
23. The labeled substrate according to claim 20 , wherein the catalyst is selected from the group consisting of tetrabutyl ammonium hydroxide, methyl tributyl ammonium hydroxide, ammonium hydroxide, tetrabutyl ammonium chloride, methyltributyl ammonium chloride, triphenyl phosphine, chromium acetate, and combinations thereof.
24. The labeled substrate according to claim 19 , wherein the layer of adhesive further comprises an ultraviolet photoinitiator.
25. The labeled substrate according to claim 15 , wherein the adhesion of the region of reduced adhesion is at least 30% less than the adhesion of the region of non-reduced adhesion.
26. The labeled substrate according to claim 25 , wherein the adhesion of the region of reduced adhesion is at least 50% less than the adhesion of the region of non-reduced adhesion.
27. The labeled substrate according to claim 15 , wherein the region of reduced adhesion comprises an area of deadened adhesion.
28. The labeled substrate according to claim 15 wherein an entirety of the transparent face layer is not completely pulled off the container.
29. The assembly according to claim 15 wherein the region of reduced adhesion is prepared by covering a portion of the face layer with a mask that is non-transparent to radiant energy, and irradiating the assembly with radiant energy such that radiant energy not blocked by the mask passes through the face layer to thereby reduce the adhesion of the region of reduced adhesion.
30. An extended content adhesive assembly, the assembly comprising:
a transparent face layer defining a front surface and an oppositely disposed back surface,
a release liner,
an adhesive layer disposed between the back surface of the face layer and the release liner, the adhesive layer comprising a region of reduced adhesion that is configured upon removal of the release liner to form a removable bond with an associated substrate, and a region of non-reduced adhesion that is configured upon removal of the release liner to form a permanent bond with the associated substrate,
indicia on the front surface of the face layer, the indicia being visible through the face layer from the back surface of the face layer, thereby defining extended content,
a floodcoat over the extended content, the extended content being visible through the face layer from the back surface of the face layer,
wherein upon bonding the adhesive layer to the associated substrate, the region of reduced adhesion is configured to be peeled away from the associated substrate to thereby reveal the extended content,
wherein an entirety of the transparent face layer is not completely pulled off the associated substrate to reveal the back surface of the face layer so that the extended content can be viewed.
31. The assembly according to claim 30 wherein the region of reduced adhesion is prepared by covering a portion of the face layer with a mask that is non-transparent to radiant energy, and irradiating the assembly with radiant energy such that radiant energy not blocked by the mask passes through the face layer to thereby reduce the adhesion of the region of reduced adhesion.
32. The assembly according to claim 30 wherein the adhesive layer comprises radiant energy sensitive adhesive configured to undergo a reduction in adhesion upon exposure to radiant energy.