Back to results
US 5,393,560 AGranted
Method for preparing a heat-sensitive recording material
AssigneeKanzaki Paper Mfg. Co., Ltd.
InventorsKiyomi Okada, Gensuke Matoba
Life of this patent
Estimating the term…
Abstract
A heat-sensitive recording material having a uniform protective layer on a heat-sensitive recording layer formed on a base sheet which is a plastic film or synthetic paper can be obtained without generating a bar-line, streak or scratch. The protective layer is formed on the heat-sensitive recording layer after adjusting Bekk smoothness (measured by TAPPI standard T479 om-81) of the heat-sensitive recording layer to 500.about.6,000 seconds, preferably 1,500.about.4,500 seconds.
Claims8
A method for preparing a heat-sensitive recording material, which comprises the steps of:
- (1) forming a heat-sensitive recording layer on a base sheet of a plastic film or synthetic paper, wherein the heat-sensitive recording layer comprises a chromogenic material and a color developer which produces a color by thermally contacting with the chromogenic material and characterized in that the heat-sensitive recording layer is formed by applying an aqueous coating composition comprising the chromogenic material and the color developer together with a binder and a pigment with use of a coater selected from the group consisting of bar coaters, rod coaters and blade coaters to the Bekk smoothness of the heat-sensitive recording layer from 500 to 6000 seconds, and (2) forming a protective layer on the heat-sensitive recording layer, wherein the protective layer is formed by applying an aqueous coating composition on the heat-sensitive recording layer with use of a coater selected from the group consisting of bar coaters, rod coaters and blade coaters.
Dependencies are inferred from the claim text.