Polyacrylate Release Layer in Thermal Transfer Medium
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
U.S. Patent No. 4,453,839 describes a thermal transfer medium or ribbon suitable for correction having a resistive substrate carrying a very thin aluminum layer and ink layer opposite the substrate layer. The ink is rendered flowable by heat from the substrate layer, and printing by the ink is correctable by lift-off correction using the ink layer of the transfer medium itself heated to an intermediate temperature. The patent describes a release layer of relatively low-melting resin located between the aluminum and the ink to facilitate printing without loss of the lift-off correction function. Polyacrylates resins, such as JONCRYL 682* resin, as the release layer material have been found to be particularly suitable.