A thermal transfer printing receiver sheet for use in association with a compatible donor sheet, the receiver sheet comprising a receiving layer to receive a dye thermally transferred from the associated compatible donor sheet, and further comprising a release medium and adhesion-promoting medium an
A thermal transfer printing receiver sheet for use in association with a compatible donor sheet, the receiver sheet comprising a receiving layer to receive a dye thermally transferred from the associated compatible donor sheet, and further comprising a release medium and adhesion-promoting medium and an antistatic medium, wherein said release medium, said adhesion-promoting medium and said anti-static medium are, independently, present as a coating on at least part of at least one surface of the receiving layer or present in the receiving layer; use thereof as a clear printable overlaminate; and a laminated multilayer film comprising one or more of said receiver sheet(s) and a backing sheet comprising a film-forming material.
대표청구항▼
The invention claimed is: 1. A thermal transfer printing receiver sheet for use in association with a compatible donor sheet, the receiver sheet having a first and a second surface, the receiver sheet comprising: a receiving layer to receive a dye thermally transferred from the associated compatibl
The invention claimed is: 1. A thermal transfer printing receiver sheet for use in association with a compatible donor sheet, the receiver sheet having a first and a second surface, the receiver sheet comprising: a receiving layer to receive a dye thermally transferred from the associated compatible donor sheet, and further comprising a release medium, an adhesion-promoting medium and an antistatic medium, wherein said release medium, said adhesion-promoting medium and said anti-static medium are, independently, present as a coating on at least part of at least one surface of the receiving layer or present in the receiving layer, wherein said receiving layer has an ABA multilayer structure comprising a substrate layer comprising polyethylene terephthalate, wherein said substrate layer is disposed between first and second dye-receptive layers, said dye receptive layers comprising a copolyester of from 65 to 85 mole % ethylene terephthalate and from 35 to 15 mol % ethylene isophthalate and wherein the adhesion-promoting medium on the second surface of the receiver sheet comprises a phthalate ester. 2. The receiver sheet according to claim 1 wherein said receiver sheet is an optically clear receiver sheet having a haze less than 3.5%. 3. The receiver sheet according to claim 1 wherein said release medium, said adhesion-promoting medium and said anti-static medium are, independently, present as a coating on at least part of at least one surface of the receiving layer. 4. The receiver sheet according to claim 1 wherein the receiver sheet comprises a release medium, an anti-static medium and optionally an adhesion-promoting medium on its first surface. 5. The receiver sheet according to claim 1 wherein the receiver sheet comprises a release medium, an anti-static medium and optionally an adhesion-promoting medium on its first surface and an adhesion-promoting medium on its second surface. 6. The receiver sheet according to claim 1 wherein the anti-static medium is anionic or neutral. 7. The receiver sheet according to claim 1 wherein the antistatic medium comprises homopolymer(s) and/or copolymer(s) of sodium styrenesulphonate. 8. The receiver sheet according to claim 1 wherein the anti-static medium comprises poly(sodium styrene sulphonate-maleic anhydride). 9. The receiver sheet according to claim 1 wherein the release medium is a polyurethane resin which is the reaction product of (i) an organic polyisocyanate, (ii) an isocyanate-reactive polydialkylsiloxane, and (iii) a polymeric polyol. 10. The receiver sheet according to claim 1 wherein the adhesion-promoting medium comprises an acrylic and/or methacrylic polymeric resin. 11. The receiver sheet according to claim 1 wherein the adhesion-promoting medium comprises ethyl acrylate and methyl methacrylate. 12. The receiver sheet according to claim 1 wherein the adhesion-promoting medium comprises a cross-liking agent. 13. The receiver sheet according to claim 1 wherein the first surface of the receiver sheet comprises the release medium in an amount of about 0.5 to about 3% by weight; the anti-static medium in an amount of about 0.1 to about 1.0% by weight; and the adhesion-promoting medium in an amount of about 1 to about 4% by weight, relative to the total weight of the dry solids in the coating. 14. The receiver sheet according to claim 1 wherein said at least one surface of the receiving layer is a first surface and wherein a second surface of the receiver sheet comprises the adhesion-promoting medium in an amount of about 2 to about 4% by weight, relative to the total weight of the dry solids in the coating. 15. A clear printable overlaminate, comprising: the receiver sheet according to claim 1. 16. A laminated multilayer film, comprising: one or more receiver sheet(s) according to claim 1 and a backing sheet comprising a film-forming material. 17. A laminated multilayer film, comprising: a first and a second receiver sheet according to the receiver sheet of claim 1 and a backing sheet wherein the phthalate ester-containing layers of said first and second receiver sheets are disposed such that they are in contact with opposite surfaces of the backing sheet. 18. A thermal transfer printing receiver sheet for use in association with a compatible donor sheet the receiver sheet comprising a receiving layer to receive a dye thermally transferred from the associated compatible donor sheet, and further comprising a release medium, an adhesion-promoting medium and an antistatic medium, said release medium, said adhesion-promoting medium and said anti-static medium being independently present as a coating on at least part of at least one surface of the receiving layer or present in the receiving layer, wherein: (i) said receiving layer has an ABA structure wherein the B layer is a clear PET-containing substrate layer and the A layers are clear dye-receptive layers comprising a copolyester of 65 to mole 85 ethylene terephthalate and 35 to 15 mole % ethylene isophthalate; (ii) a coating on a first surface of the receiving layer comprises an antistatic medium, a release medium, optionally an adhesion-promoting medium and optionally a cross-linking agent; and (iii) a coating on a second surface of the receiving layer comprises an adhesion-promoting medium, a cross-linking agent and a phthalate ester. 19. A clear printable overlaminate, comprising: the receiver sheet according to claim 18. 20. A laminated multilayer film, comprising: one or more receiver sheet(s) according to claim 18 and a backing sheet comprising a film-forming material. 21. A laminated multilayer film, comprising: a first and a second receiver sheet according to the receiver sheet of claim 18 and a backing sheet wherein the phthalate ester-containing layers of said first and second receiver sheets are disposed such that they are in contact with opposite surfaces of the backing sheet.
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