Paper and coating medium for multifunctional printing
AssigneeNewPage Wisconsin System Inc.
InventorsLeonard J. Schliesman, James P. Niemiec, Fikret Kaya, Robert S. Van Helden
Life of this patent
Estimating the term…
Abstract
A paper coating includes a combination of a primary pigment and a secondary pigment. The primary pigment includes anionic particles having a particle size distribution where at least 96% of the particles by weight have a particle size less than 2 microns. The secondary pigment is a cationic, grit-free pigment having an average particle size of 3 microns or less. The coating also includes up to 17 weight % of a hydrophilic styrene-butadiene latex based on the weight of the dry pigments and a co-binder. Another embodiment of this invention is a coated base sheet that includes a base sheet to which the above coating has been applied.
Claims18
An anionic coating for a paper base sheet comprising:
- an anionic, inorganic primary pigment having a particle size distribution where at least 96% of the particles by weight have a particle size less than 2 microns;
- at least one cationic, grit-free, inorganic secondary pigment having an average particle size of 3 microns or less;
- from 6% to 17 weight % latex binder based on the weight of the dry pigments, wherein said latex binder is an anionic hydrophilic styrene/butadiene latex;
- and
- a co-binder.
Dependencies are inferred from the claim text.