Thermal transfer printing dye sheet
US5691273A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Jul 16, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/914
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A dye sheet for thermal transfer printing comprising a substrate having on one surface thereof a dye coat which comprises a dye capable of thermal transfer dispersed in a polymer binder, characterized in that R-1 is a minimum where PA1 R=K.sub.sl /K.sub.tt, wherein PA1 K.sub.sl =AD.sub.sl /AP.sub.sl where AD.sub.sl is the absorption due to the dye and AP.sub.sl is the absorption due to the polymer over the surface layer; PA1 K.sub.tt =AD.sub.tt /AP.sub.tt where AD.sub.tt is the absorption due to the dye and AP.sub.tt is the absorption due to the polymer for the total thickness of the coating; and the values for AD.sub.sl, AP.sub.sl, AD.sub.tt and AP.sub.tt being measured by Attenuated Total Reflection Spectroscopy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.