Process for producing pressure-sensitive carbonless transfer she

Details Process for producing pressure-sensitive carbonless transfer she Process for producing pressure-sensitive carbonless transfer she

1977-08-29

1979-01-30

Lesmes, George F.

Coating processes

Transfer or copy sheet making

Reactive components

282 275, 427151, B41M 522

Patent

active

041373430

ABSTRACT:
A pressure-sensitive carbonless transfer sheet comprising a paper substrate having a front and back surface and a coating composition adhered to at least one of the surfaces of the paper substrate. A novel process is provided for producing a pressure-sensitive carbonless transfer sheet which comprises the steps of preparing a hot melt suspending medium, the hot melt suspending medium being water insoluble and having a melting point of from about 60.degree. C. to about 140.degree. C. and a melting point range of less than about 15.degree. C. A microencapsulated chromogenic material is prepared and dispersed in the hot melt suspending medium, the chromogenic material being a color precursor of the electron donating type. A coating dispersion is prepared by combining the hot melt suspending medium with the microencapsulated chromogenic color precursor material, the hot melt suspending medium being compatible with the color forming or developing characteristics of the chromogenic material. The coating dispersion is then applied to a substrate, the coating dispersion being applied at a coat weight of from about 1.0 pound to about 8.0 pounds per 3300 square feet of substrate at a coat thickness of from about 1 micron to about 50 microns. The coated substrate is set by cooling the coating dispersion.

REFERENCES:
patent: 3016308 (1962-01-01), Macauley
patent: 3079351 (1963-02-01), Staneslow et al.
patent: 3684549 (1972-08-01), Shank

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