Thermal transfer film comprising a reactive polymer composition for laser-induced coating
AssigneeMAN Roland Druckmaschinen AG
InventorsJosef Schneider, Andrea Fuchs, Thomas Hartmann
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Abstract
A thermal transfer film or a thermal transfer ribbon includes a substrate layer and a donor layer applied thereto. The substrate layer consists of at least one polymer composition which has mechanical stability at a temperature >150° C. and transmission >70% for light having a wavelength of from 700 to 1600 nm. The donor layer comprises at least the following components: a substance which is able to convert the radiation energy of the incident laser light into heat energy, a polymer which contains acidic groups and/or unsubstituted or substituted amide groups thereof, and optionally a wetting aid. The polymer composition also includes a reactive polymer.
Claims22
A printing plate comprising a surface which has been imaged by laser-induced transfer with a composition comprising a substance which is able to convert radiation energy of incident laser light into heat energy, a polymer which contains at least one of acidic groups and unsubstituted or substituted amide groups of said acidic groups, and a wetting aid, wherein said substance comprises at least one of
- a) one of an organic dye and an organic colorant having at least one of an absorption maximum in the wavelength range from 700 to 1600 nm, and a heat resistance of greater than 150° C.;
- b) an inorganic substance which is able to convert radiation energy into heat energy without decomposing, and
- c) a type of carbon, wherein said polymer comprises 1-20% reactive polymer consisting of one of an epoxide, an isocyanate, and polyvinyl butyral.
Dependencies are inferred from the claim text.