Thermal transfer dyesheet
US5300474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1991 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | May 24, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A dyesheet is provided for thermal transfer printing, comprising a base sheet having a thermal transfer dye layer on one surface, and on the other a heat resistant backcoat comprising a crosslinked reaction product of radically polymerising a compound having a plurality of polymerisable unsaturated groups per molecule, wherein the backcoat is formulated to minimise scratching of the print during printing. The formulation comprises a) a compound having a single radically polymerisable unsaturated group which is copolymerised with the compound having a plurality of polymerisable unsaturated groups per molecule, and b) a multivalent metal salt of a long chain alkyl or alkylphenyl phosphate ester as slip agent. These two factors (a & b) work together, and if either is omitted, relief from scratching does not generally occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.