Thermographic elements
AssigneeMinnesota Mining and Manufacturing Company
InventorsEdward F. Hampl, Jr., Susan K. Jongewaard, Suzanne J. Thompson
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Abstract
Thermographic elements comprising at least two layers, wherein: at least one of the layers comprises polymer, the polymer consisting essentially of, repeating, interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid or blends thereof, the polymer being sufficiently low in oligomer content to allow formation of uniform film; and at least one of the layers is an imaging layer, selected from the group consisting of dye-donor layers, image-receiving layers or heat-activatable imaging layers, and a method of thermal imaging using receptor films comprising the polymer described above.
Claims27
A thermographic element comprising at least two layers, wherein:
- at least one of the layers comprises polymer, and the polymer consists essentially of repeating interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid or mixtures thereof, and is sufficiently low in oligomer content to allow formation of one uniform film;
- and
- at least one of the layers is an imaging layer selected from the group consisting of dye-donor layers, image-receiving layers or heat-activatable imaging layers;
- and
- wherein said polymer-comprising layer further comprises less than about 5 weight percent of a slip compound.
A thermographic element comprising at least a substrate layer and a dye-donor layer, wherein:
- the substrate layer comprises polymer and the polymer consists essentially of repeating interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid or mixtures thereof and is sufficiently low in oligomer content to allow formation of a uniform film;
- and
- disposed on one of the major surfaces of the substrate layer is the dye-donor layer.
A thermographic element comprising at least a substrate layer, a dye-donor layer and an antistick layer, wherein:
- the substrate layer comprises a material selected from the group consisting of paper, filled or transparent films of polyesters other than polyester consisting essentially of repeating interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid or mixtures thereof, polysulphone, polystyrene, polycarbonate, polyimide, polyamide, cellulose ester and polyvinyl chloride;
- and
- disposed on a major surface of the substrate layer is a dye-donor layer;
- and
- disposed on the other major surface of the substrate layer is an antistick layer comprising polymer, the polymer consisting essentially of repeating interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, therephthalic acid or mixtures thereof and being sufficiently low in oligomer content to allow formation of a uniform film.
A thermographic element comprising at least a substrate layer and an image-receiving layer, wherein:
- the substrate layer comprises a polymer and the polymer consists essentially of repeating interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid or mixtures thereof and is sufficiently low in oligomer content to allow formation of uniform film;
- and
- disposed on one of the other major surfaces of the substrate layer is the image-receiving layer.
A thermographic element comprising at least a substrate layer and an image-receiving layer wherein:
- the substrate layer comprises a material selected from the group consisting of paper, filled or transparent films of polyester other than polyester consisting essentially of repeating interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid or mixtures thereof, polysulphone, polystyrene, polycarbonate, polyimide, polyamide, cellulose ester and polyvinyl chloride;
- and
- disposed on one of the major surfaces of the substrate layer, is the image-receiving layer, which layer comprises polymer and the polymer consisting essentially of repeating interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, therephthalic acid or mixtures thereof and being sufficiently low in oligomer content to allow formation of a uniform film.
A thermographic element comprising at least a substrate layer and a heat-activatable imaging layer, wherein:
- the substrate layer comprises polymer and the polymer consists essentially of repeating interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid or mixtures thereof and is sufficiently low in oligomer content to allow formation of a uniform film;
- and,
- disposed on one of the major surfaces of the substrate layer is the heat-activatable imaging layer.
A thermographic element comprising at least a substrate layer, a heat-activatable imaging layer and antistick layer wherein:
- the substrate layer comprises a material selected from the group consisting of paper, filled or transparent films of polyesters other than polyester consisting essentially of repeating interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid or mixtures thereof, polysulphone, polystyrene, polycarbonate, polyimide, polyamide, cellulose ester and polyvinyl chloride;
- and
- disposed on one of the major surfaces of the substrate layer is the heat-activatable imaging layer;
- and
- disposed on an exposed surface of the heat-activatable imaging layer is the antistick layer comprising polymer, the polymer consisting essentially of repeating interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, therephthalic acid or mixtures thereof and being sufficiently low in oligomer content to allow formation of a uniform film.
A method of thermal transfer imaging, the process comprising the step of selectively transferring in an imagewise manner, an image-forming material from a dye donor element to a receptor element, the receptor element comprising polymer consisting essentially of repeating, interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid and mixtures thereof.
Dependencies are inferred from the claim text.