Thermal recording material with improved initial contrast

The present invention provides a thermal recording material having a thermosensitive layer comprising single phase diffuser polymer particles. Each of the diffuser polymer particles has a refractive index at the center thereof (RI center ) different from a refractive index at the surface thereof (RI...

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Bibliographic Details
Main Authors PRANAMI, GAURAY, LAFLEUR, EDWARD E, RAY, HIMAL H
Format Patent
LanguageEnglish
French
German
Published 30.09.2015
Subjects
COLOUR PRINTING
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:The present invention provides a thermal recording material having a thermosensitive layer comprising single phase diffuser polymer particles. Each of the diffuser polymer particles has a refractive index at the center thereof (RI center ) different from a refractive index at the surface thereof (RI surface ), and a continuous refractive index gradient, sometimes referred to as GRIN technology. The diffuser polymer particles may have a RI center of from 1.46 to 1.61 and a particle size of 0.85 to 15 microns. Additionally, the thermal recording material of the present invention may also include heat deformable particles and a binder. The present invention also provides a method for providing an image by subjecting selected portions of a recording material such as that described above to a physical agent selected from the group consisting of heat, pressure, and combinations thereof, sufficient to reduce the opacity of said selected portions.
Bibliography:Application Number: EP20140179281