Pressure-sensitive record material containing urea-formaldehyde

Details Pressure-sensitive record material containing urea-formaldehyde Pressure-sensitive record material containing urea-formaldehyde

1977-06-21

1979-09-04

Herbert, Jr., Thomas J.

Textiles: manufacturing

428307, 428325, 428326, 428327, 428531, 428535, 428914, B41L 136

Patent

active

041666445

ABSTRACT:
Improved print speed and image intensity are obtained in a pressure-sensitive record sheet material by incorporating a cross-linked urea-formaldehyde agglomerated resin pigment in the coated surface of the acid-reacting sheet. A typical formulation of the coating comprises kaolin clay, a zinc-modified phenol-formaldehyde resin, said urea-formaldehyde resin pigment and a suitable binder. When contacted under pressure with a surface containing microscopic rupturable capsules of a colorless chromogeneous material, a colored mark is formed by transfer of the colorless chromogeneous material to the acidic pigment coating.

REFERENCES:
patent: 3617410 (1971-11-01), Clark
patent: 3723156 (1973-03-01), Brockett et al.
patent: 3927237 (1975-12-01), Sund
patent: 3952132 (1976-04-01), Kato et al.
patent: 3988522 (1976-10-01), Berstein

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