Thermographic processes using polymer layer capable of existing

Details Thermographic processes using polymer layer capable of existing Thermographic processes using polymer layer capable of existing

1974-05-29

1976-03-02

Klein, David

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

96 28, 96 48HD, 101470, 250316, 250317, 250318, 427145, B44C 100, G03C 524, G03C 1112, G03C 516

Patent

active

039415961

ABSTRACT:
Process for forming images by heating, imagewise, to a temperature above a softening temperature, but below the thermal decomposition temperature, a solid layer of a mixture of a thermoplastic, amorphous, organic polymer and a liquid plasticizer therefor, the mixture being capable of existing in a metastable state and a stable state for a period sufficient to convert the stable polymer to the metastable state, heating the entire surface of the layer to a temperature between the softening temperature of the stable and metastable states, and converting the softened exposed image areas to a visible image by applying finely divided colored particles to the layer and removing them from nonexposed areas or by thermal transfer. The simple procedure is a dry process, and images of high quality and stability are obtained rapidly.

REFERENCES:
patent: 3060024 (1962-10-01), Borg et al.
patent: 3060026 (1962-10-01), Heiart
patent: 3073953 (1963-01-01), Cohen et al.
patent: 3089952 (1963-05-01), Wartman et al.
patent: 3206601 (1965-09-01), Gold
patent: 3260612 (1966-07-01), Dulmage et al.
patent: 3833441 (1974-09-01), Heiart
Modern Plastics Encyc. and Engrg. Handbook, 1952, Plastics Catalogue Co., N.Y., N.Y. pp. 697-703.

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