Thermal clear laminate donor element
US9056514B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2013 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Dec 12, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M2205/40
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal transfer donor element has a polymeric support having at least a portion thereof coated with a thermal transferable protective transparent film. This film comprises: (1) a poly(vinyl acetal) in an amount of at least 50-70 weight %, (2) a second polymer, and (3) colloidal silica. In addition, (a) the molecular weight of the second polymer is greater than the molecular weight of the poly(vinyl acetal), (b) the weight ratio of the poly(vinyl acetal) to the second polymer is at least 5:1 and up to and including 12:1, (c) the weight ratio of colloidal silica to the second polymer is at least 1.5:1 and up to and including 3:1, and (d) the amount of colloidal silica is at least 10 weight % and up to and including 20 weight %, based on total thermal transferable protective transparent film dry weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.