Thermal transfer printing method and printing paper with cellulo

Bleaching and dyeing; fluid treatment and chemical modification – Diffusion transfer dyeing process – transfer sheet and product – Dry heat treatment for penetration

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Details

8512, 8519, 8919, 428195, 428256, 428336, 428206, 3461351, D06P 152, B41M 526, D21H 336, B32B 2906

Patent

active

047310910

ABSTRACT:
In a thermal transfer-type printing method in which an image is formed on printing paper by the selective transfer thereto of disperse dye from a dye carrier of flexible sheet material in response to the selective application of thermal energy to the carrier while in contact with a surface of the printing paper, the latter is comprised of a base of cellulose fibers and resin into which the disperse dye diffuses for producing a clear definition of the image. The resin is desirably polyester or acetyl cellulose either in the form of fibers which are co-mingled with the cellulose fibers in the base of the printing paper, or in the form of a coating on a surface of the paper base. After the image has been formed by thermal transfer on a surface of the printing paper, a thin transparent film, preferably of polyester, is laminated over the printed surface by a polyester adhesive and the application of heat and pressure so that recrystallized disperse dye remaining on the surface of the printing paper is further diffused into the polyester adhesive.

REFERENCES:
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patent: 4132833 (1979-01-01), Sandhu
patent: 4207069 (1980-06-01), Ono
patent: 4273552 (1981-06-01), Nischwitz
patent: 4284410 (1981-08-01), Nischwitz et al.
patent: 4294641 (1981-10-01), Reed et al.
patent: 4496955 (1985-01-01), Maeyama et al.
patent: 4505975 (1985-03-01), Majima
patent: 4522881 (1985-06-01), Kobayashi et al.
patent: 4576610 (1986-03-01), Donenfeld

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