Self-contained pressure-sensitive carbonless recording sheet...

Details Self-contained pressure-sensitive carbonless recording sheet... Self-contained pressure-sensitive carbonless recording sheet...

B - Operations, Transporting

41

M

42/10

B41M 5/124 (2006.01) B41M 5/132 (2006.01)

Patent

CA 1309251

Abstract of the Disclosure A protective overcoat is provided for a self-contained pressure-sensitive carbonless recording sheet. The sheet is initially coated with a blend of a microencapsulated color former and a color developer in a binder medium. The purpose of the overcoat is to prevent premature color formation through acci- dental rupture of the microcapsules and reaction of the color former and color developer. The overcoat comprises essentially an aqueous-based film forming material; suitable materials include: synthetic latex, polyvinylalcohol and polyvinyl alcohol-acetate copolymers, cellulose gums and ethers, acrylic resins, polyethylene oxide ethers, polyvinylpyrrolidone and copolymers of styrene, ethylene and methylvinylether with maleic anhydride.

575180

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