Patents

PATENT NUMBER 4,533,567  
Carbonless paper coating formulation

Abstract

A carbonless CFB paper includes an aqueous wax emulsion added to the CB coating to act as a barrier between the reactants in the CB coating and in the CF coating, thereby preventing precolor caused by reactants seeping into or penetrating the base paper and reacting with any ruptured capsules in the CB coating.

 

Current U.S. Class:	427/150; 427/151; 427/152; 503/214; 503/226
Intern'l Class:	B41M 005/22
Field of Search:	282/27.5 428/320.4-320.8,411,488,537,913,914 346/214,226,215,216,225 427/150-152

Chemicals Referenced

"phenolic resin coating 12 on the front side thereof and a capsular coating 14 on the back side; resin CF coating 12 and the capsular CB coating 14 on the paper 10 form a CFB sheet; Phenolic resin 28%(dry weight); petrolatum (petrolatum is available from Witco Chemical Company, Inc., New York, N.Y. 10017) ; ink coating is based on the use of a phenolic resin as the resin portion of a colorless ink (The phenolic resin is available from Durez Division, Hooker Chemical and Plastic Corporation, of North Tonawanda, N.Y. )." "10% to 50% of the capsular coating, the lower percentage giving less precolor protection and better printing, and the higher percentage giving better precolor protection and lower print quality. It should be noted that the capsule batch portion of the CB coating formulation is in accordance with a formula provided by Appleton Papers, Inc."