Dielectric product
AssigneeLudlow Corporation
InventorPhilip J. Clough
Life of this patent
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Abstract
An improved dielectric printing paper and process for making the same, characterized by excellent resolution, contrast, and feel. The paper incorporates an inorganic salt such as magnesium chloride as a conductivity-providing ingredient. The dielectric coating is formed with a high loading of inorganic fillers and is applied by a dry process to form a discontinuous dielectric coating on the conductive paper substrate.
Claims21
A dielectric paper sheet of the type useful in dielectric printing processes, said paper sheet comprising a cellulosic paper substrate with an inorganic salt distributed therein in a quantity effective to form means to impart conductivity to said sheet when said sheet is equilibrated at 25.degree. C. at relative humidities from 20 to 70%, the improvement wherein said substrate comprises a discontinuous dielectric printing coating on the surface thereon, said coating being formed of an organic polymer and filled with at least 40% inorganic fillers and having a minimum resistivity four orders of magnitude greater than the resistivity of said substrate, and wherein the said fillers are preferentially concentrated at the outer surface of said coating.
Dependencies are inferred from the claim text.