Type of thermal imaging medium and method of forming an image wi

Details Type of thermal imaging medium and method of forming an image wi Type of thermal imaging medium and method of forming an image wi

1996-09-06

1998-02-24

Hess, Bruce H.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156240, 156277, 428195, 428212, 428500, 428520, 430200, B41M 540

Patent

active

057208417

ABSTRACT:
A new type of positive working thermal imaging medium, and a process of forming an image with it is disclosed. This thermal imaging medium comprises a transparent support and (1) a layer comprising a homopolymer or copolymer comprising at least 60 mole % of monomer units containing covalently bound chlorine, (2) a layer containing a homopolymer or copolymer comprising at least 50 mole % of a vinyl acetal monomer unit, (3) an image forming layer, (4) a release layer, and (5) a thermoadhesive layer. After or before exposure to a heat pattern generated directly by a thermal head or indirectly by information-wise exposure to laser radiation a cover sheet is laminated to layer (5). After delamination a positive image is obtained on the original support.

REFERENCES:
patent: 4157412 (1979-06-01), Deneau

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