Thermal transfer dyesheets

Details Thermal transfer dyesheets Thermal transfer dyesheets

1989-12-05

1992-04-21

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having plural interactive leaves

428195, 428913, 428914, B41M 5035, B41M 526

Patent

active

051068176

ABSTRACT:
A cleaner thermal transfer dyesheet comprises a supportive base material coated with a composition of a thermally transferable dye dispersed throughout a polymer matrix, the dye being composed of organic molecules alignable to form crystals having a major axis, and a molecular structure having at least one carbon atom bonded to a single moiety and positioned in the molecule such that the size of said moiety effects the rate of crystal growth along the major axis; the coating having in addition to the dye molecules, a minor amount of a crystallization modifier consisting of molecules essentially the same as the dye molecules except that said moiety is replaced by a more bulky substituent.
Likewise, where the dye is recognized as having a molecular structure with one or more carbon atoms each bonded to a single moiety positioned to extend from the prime face, a crystallization modifier consists of molecules essentially the same as the dye molecules except that said moiety is replaced by a more bulky substituent.
The effect of adding a minor amount of such crystallization modifie is to provide a cleaner, more stable dyesheet.

REFERENCES:
patent: 4725284 (1988-02-01), Black et al.

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