摘要：
A heat-transfer label well-suited for use in decorating silane-treated glass articles. In a preferred embodiment, the label exhibits good scuff resistance, is capable of withstanding pasteurization conditions on a silane-treated glass article and includes (a) a support portion in the form of a sheet of paper overcoated with a release layer of polyethylene, (b) a skim coat of wax overcoated onto the polyethylene release layer and (c) a transfer portion, the transfer portion including a cross-linked phenoxy protective lacquer layer printed onto the skim coat, a polyester ink layer printed onto the protective lacquer layer, and an adhesive layer printed onto the ink layer, as well as onto any exposed portions of the underlying protective lacquer layer and onto a surrounding area of the skim coat. The cross-linked phenoxy resin comprises a solvent-soluble phenoxy resin of the formula wherein the solvent-soluble phenoxy resin is cross-linked by a melamine formaldehyde resin. The adhesive layer comprises a phenoxy resin of the type present in a water-based phenoxy resin dispersion. The adhesive layer is preferably made by gravure printing onto its underlying layers an adhesive composition comprising the water-based phenoxy resin dispersion, isopropyl alcohol and water, and then evaporating the volatile components of the composition to leave an adhesive phenoxy film.
权利要求：
What is claimed is:
1. A heat-transfer label comprising:
(a) a support portion; and
(b) a transfer portion over said support portion for transfer of the transfer portion from the support portion to an article upon application of heat to the support portion while the transfer portion is placed into contact with the article, said transfer portion comprising
(i) a protective lacquer layer;
(ii) an ink layer over said protective lacquer layer; and
(iii) an adhesive layer over said ink and protective lacquer layers, said adhesive layer comprising a phenoxy resin.
2. The heat-transfer label as claimed in claim 1 further comprising a waxlike skim coat, said waxlike skim coat being interposed between said support portion and said transfer portion.
3. The heat-transfer label as claimed in claim 1 wherein said phenoxy resin is a phenoxy resin of the type present in a waterborne phenoxy dispersion.
4. The heat-transfer label as claimed in claim 3 wherein said waterborne phenoxy dispersion is an anionically-stabilized aqueous colloidal dispersion of a solid grade phenoxy resin having both hydroxyl groups and carboxyl groups, said anionically-stabilized aqueous colloidal dispersion having a solids content of about 34%, by weight, a pH of about 7.2, a Brookfield viscosity at 25.degree. C. of about 1100 cP, a weight per gallon of about 8.80 pounds, an average particle size of about 0.09 micron, a flash point (PMCC) of about 141.degree. F. and a freeze point of about -4.degree. C.
5. The heat-transfer label as claimed in claim 4 wherein said adhesive layer is made by depositing onto said ink and protective lacquer layers a composition comprising about 66.5%, by weight, of said anionically-stabilized aqueous colloidal dispersion, about 16.75%, by weight, isopropyl alcohol and about 16.75%, by weight, water and then evaporating the volatile components thereof.
6. The heat-transfer label as claimed in claim 1 wherein said ink layer comprises at least one of a polyester ink and a phenoxy ink.
7. The heat-transfer label as claimed in claim 1 wherein said protective lacquer layer comprises a cross-linked phenoxy resin.
8. The heat-transfer label as claimed in claim 6 wherein said protective lacquer layer comprises a solvent-soluble phenoxy resin.
9. The heat-transfer label as claimed in claim 3 wherein said protective lacquer layer comprises a cross-linked phenoxy resin and wherein said ink layer comprises at least one of a polyester ink and a phenoxy ink.
10. The heat-transfer label as claimed in claim 9 wherein said cross-linked phenoxy resin ismade by cross-linking a solvent-soluble phenoxy resin having the following chemical structure: ##STR5##
11. The heat-transfer label as claimed in claim 10 wherein said solvent-soluble phenoxy resin, prior to cross-linking, has a solution viscosity of 4500 to 7000 mPa.cndot.s(cP) at 40% solids, by weight, in methyl ethyl ketone.
12. The heat-transfer label as claimed in claim 11 wherein said solvent-soluble phenoxy resin is cross-linked using a melamine-formaldehyde resin.
13. The heat-transfer label as claimed in claim 12 wherein said melamine-formaldehyde resin is a partially methylated melamine-formaldehyde resin.
14. The heat-transfer label as claimed in claim 13 wherein said partially methylated melamine-formaldehyde resin constitutes no more than about 5%, by weight, of said protective lacquer layer.
15. The heat-transfer label as claimed in claim 1 wherein said phenoxy resin is a cross-linked phenoxy resin.
16. The heat-transfer label as claimed in claim 15 wherein said cross-linked phenoxy resin is made by cross-linking a solvent-soluble phenoxy resin having the following chemical structure:
17. The heat-transfer label as claimed in claim 16 wherein said solvent-soluble phenoxy resin, prior to cross-linking, has a solution viscosity of 4500 to 7000 mPa.cndot.s(cP) at 40% solids, by weight, in methyl ethyl ketone.
18. The heat-transfer label as claimed in claim 17 wherein said solvent-soluble phenoxy resin is cross-linked using a melamine-formaldehyde resin.
19. The heat-transfer label as claimed in claim 18 wherein said melamine-formaldehyde resin is a partially methylated melamine-formaldehyde resin.
20. The heat-transfer label as claimed in claim 19 wherein said partially methylated melamine-formaldehyde resin constitutes no more than about 5%, by weight, of said adhesive layer.
21. The heat-transfer label as claimed in claim 1 wherein said phenoxy resin is a solvent-soluble phenoxy resin.
22. The heat-transfer label as claimed in claim 21 wherein said protective lacquer layer comprises a cross-linked phenoxy resin and wherein said ink layer comprises at least one of a polyester ink and a phenoxy ink.
23. A transfer portion of a heat-transfer label, said transfer portion comprising: (a) an ink design layer; and
(b) an adhesive layer positioned over said ink design layer, said adhesive layer comprising a phenoxy resin.
24. The transfer portion as claimed in claim 23 wherein said phenoxy resin is a phenoxy resin of the type present in a waterborne phenoxy dispersion.
25. The transfer portion as claimed in claim 24 wherein said waterborne phenoxy dispersion is an anionically-stabilized aqueous colloidal dispersion of a solid grade phenoxy resin having both hydroxyl groups and carboxyl groups, said anionically-stabilized aqueous colloidal dispersion having a solids content of about 34%, by weight, a pH of about 7.2, a Brookfield viscosity at 25.degree. C. of about 1100 cP, a weight per gallon of about 8.80 pounds, an average particle size of about 0.09 micron, a flash point (PMCC) of about 141.degree. F. and a freeze point of about -4.degree. C.
26. The transfer portion as claimed in claim 24 wherein said ink design layer comprises at least one of a polyester ink and a phenoxy ink.
27. The transfer portion as claimed in claim 26 further comprising a protective lacquer layer, said protective lacquer layer comprising a cross-linked phenoxy resin, said ink design layer being positioned over said protective lacquer layer.
28. The transfer portion as claimed in claim 23 wherein said phenoxy resin is a cross-linked phenoxy resin.
29. The transfer portion as claimed in claim 28 wherein said cross-linked phenoxy resin is made by cross-linking a solvent-soluble phenoxy resin having the following chemical structure: ##STR6## wherein said solvent-soluble phenoxy resin is cross-linked using a melamine-formaldehyde resin.
30. The transfer portion as claimed in claim 29 wherein said ink design layer comprises at least one of a polyester ink and a phenoxy ink.
31. The transfer portion as claimed in claim 30 further comprising a protective lacquer layer, said protective lacquer layer comprising a cross-linked phenoxy resin, said ink design layer being positioned over said protective lacquer layer.
32. A method of decorating an article, said method comprising the steps of:
(a) providing a heat-transfer label, said heat-transfer label comprising:
(i) a support portion, and
(ii) a transfer portion over said support portion for transfer of the transfer portion from the support portion to the article upon application of heat to the support portion while the transfer portion is placed into contact with the article, said transfer portion comprising a protective lacquer layer, an ink design layer over said protective lacquer layer, and an adhesive layer over said ink and protective lacquer layers, said adhesive layer comprising a phenoxy resin; and
(b) transferring said transfer portion from said support portion to the article.
33. The method as claimed in claim 32 wherein the article is a silane-treated glass container and wherein said phenoxy resin is a phenoxy resin of the type present in a waterborne phenoxy dispersion.
34. The method as claimed in claim 33 further comprising, after said transferring step, the step of subjecting the decorated silane-treated glass container to pasteurization conditions.
35. The method as claimed in claim 32 wherein said phenoxy resin is a cross-linked solvent-soluble phenoxy resin.