US5134112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer sheet
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1990-03-06
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Granted: 1992-07-28
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Expires: 2010-03-06
Abstract
Abstract The present invention provides a heat transfer sheet including a substrate film and a dye and binder-containing dye layer formed thereon, characterized in that the substrate film includes a polyester film and an adhesive layer is formed between the substate film and the dye layer. The adhesive layer is stretched simultaneously with the substrate film, while the adhesive layer remains formed on the substrate film. Such an adhesive layer can be made very thin and is very effective in preventing the dye layer from peeling off. Thus, the invention makes it possible to provide a heat transfer sheet which can impart a high density to the image with an improved heat efficiency.
Inventors
- 👤 Jumpei Kanto
- 👤 Hiroshi Eguchi
- 👤 Hideaki Sato
- 👤 Minoru Furuse
- 👤 Mineo Yamauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:43
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/44; B41M5/423; B41M5/426; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
92 words
A heat transfer sheet for heat-induced sublimation transfer printing on an image-receiving sheet, comprising: a substrate film comprising a polyester film; a dye layer formed on said substrate film, said dye layer comprising a sublimable dye and a binder; and an adhesive layer formed between said substrate film and said dye layer, said adhesive layer comprising an aqueous resin selected from the group consisting of aqueous polyurethane resins, and aqueous polybutadiene resins, said adhesive layer being stretched simultaneously with said substrate film while said adhesive layer remains formed on said substrate film.
Claim 2
Dependent Claim
92 words
A heat transfer sheet for heat-induced sublimation transfer printing on an image-receiving sheet, comprising: a substrate film comprising a polyester film; a dye layer formed on said substrate film, said dye layer comprising a sublimable dye and a binder; and an adhesive layer formed between said substrate film and said dye layer, said adhesive layer comprising an aqueous resin selected from the group consisting of aqueous polyurethane resins, and aqueous polybutadiene resins, said adhesive layer being stretched simultaneously with said substrate film while said adhesive layer remains formed on said substrate film.
Claim 3
Dependent Claim
32 words
A heat transfer sheet as recited in claim 1, wherein said adhesive layer is stretched and heat-treated simultaneously with said substrate film while said adhesive layer remains formed on said substrate film.
Claim 4
Dependent Claim
36 words
A heat transfer sheet as recited in claim 1, wherein the peel strength between said dye layer and said adhesive layer is at least 10 gf/am at 20° C. and at least gf/cm at 100° C.
Claim 5
Dependent Claim
36 words
A heat transfer sheet as recited in claim 1, wherein the peel strength between said dye layer and said adhesive layer is at least 20 gf/cm at 20° C. and at least gf/cm at 100° C.
Claim 6
Dependent Claim
23 words
A heat transfer sheet as recited in claim 1, wherein said adhesive layer has a thickness ranging from 0.005 μm to 1 μm.
Claim 7
Dependent Claim
25 words
A heat transfer sheet as recited in claim 1, wherein a binder forming said dye layer comprises a polyvinyl acetal resin or a cellulosic resin.
Claim 8
Dependent Claim
32 words
A heat transfer sheet as recited in claim 6, wherein said adhesive layer further at least one material selected from the group consisting of a surface active agent and inorganic fine particles.
Claim 9
Dependent Claim
39 words
A heat transfer sheet as recited in claim 1, wherein said aqueous resin is obtained by dispersing or emulsifying in water a hydrophilic resin or a resin rendered hydrophilic to such an extent that it remains insoluble in water.
Claim 10
Dependent Claim
60 words
A heat transfer sheet as recited in claim 1, wherein said adhesive layer is formed by subjecting the substrate film to primary stretching, then forming an adhesive layer forming coating on the surface of said substrate film subjected to said primary stretching, and finally subjecting said coating to secondary stretching simultaneously with said substrate film subjected to the primary stretching.
Claim 11
Dependent Claim
18 words
A heat transfer sheet as recited in claim 1, wherein said substrate film comprises a polyethylene terephthalate film.
Claim 12
Dependent Claim
18 words
A heat transfer sheet as recited in claim 1, wherein said substrate film comprises a polyethylene-2, 6-naphthalate film.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |