Overcoat for dye image-receiving layer used in thermal dye transfer
US4775657A · kind A · utility
31Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1988 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Feb 11, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31551
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A dye-receiving element for thermal dye transfer comprises a support having thereon a dye image-receiving layer, such as a polycarbonate, coated with an overcoat layer comprising a condensation polymer comprising recurring units of a linear chain having at least four carbon atoms, such as a polyester or a polyurethane, the overcoat layer having a T.sub.g of at least 40.degree. C. less than the T.sub.g of the dye image-receiving layer. Use of the overcoat layer of the invention helps to destratify the dye and improves stability of the transferred dyes to light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.