Porous coating compositions for printing applications
First Claim
1. A linerboard comprising:
- a board with a porous coating composition on at least one surface of the board, the porous coating composition being able to absorb water and comprising from about 55 to about 85 percent by weight calcined clay and a binder.
1 Assignment
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Accused Products
Abstract
Improved coating compositions for flexographic and other printing applications can comprise calcined clay, a binder and optionally one or more additional pigments. In some embodiments, the binder can comprise a natural composition and a synthetic composition. In addition, the coating composition can further comprise additives such as, for example, dispersants, defoamers, plastic pigments, rheology modifies, biocides, optical brighteners, cross-linkers, functional chemicals and combinations thereof. Due to the presence of the calcined clay, the improved coatings can have sufficient porosity to absorb water located in ink layers without employing significant amounts of expensive additives such as silicates and other porous compounds.
20 Citations
22 Claims
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1. A linerboard comprising:
a board with a porous coating composition on at least one surface of the board, the porous coating composition being able to absorb water and comprising from about 55 to about 85 percent by weight calcined clay and a binder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of printing comprising:
applying an ink layer to at least one surface of a substrate having a porous coating composition, the porous coating composition comprising from about 55 to about 85 percent by weight calcined clay and a binder. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A coating composition comprising:
from about 55 percent to about 85 percent calcined clay, from about 20 to about 40 percent binder, and from about 5 percent to about 15 percent titanium dioxide.
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22. A method of forming a corrugated board comprising:
operably coupling a corrugated substrate with a linerboard, the linerboard comprising a porous coating composition being able to absorb water and comprising from about 55 to about 85 percent by weight calcined clay and a binder.
Specification