US 12,460,353 B2
Oil/grease resistant paper products
Paige Allison Case Pomeroy, Falmouth, ME (US); Thomas A. Waecker, Cape Elizabeth, ME (US); Alonzo K. Osgood, Portland, ME (US); and Arbin Rajbanshi, Gorham, ME (US)
Assigned to SAPPI NORTH AMERICA, INC., Boston, MA (US)
Filed by SAPPI NORTH AMERICA, INC., Boston, MA (US)
Filed on Nov. 30, 2022, as Appl. No. 18/060,415.
Application 18/060,415 is a continuation of application No. 16/949,693, filed on Nov. 11, 2020, granted, now 11,549,216.
Prior Publication US 2023/0091321 A1, Mar. 23, 2023
Int. Cl. D21H 19/60 (2006.01); D21H 17/68 (2006.01); D21H 19/64 (2006.01); D21H 21/16 (2006.01)
CPC D21H 19/60 (2013.01) [D21H 17/68 (2013.01); D21H 19/64 (2013.01); D21H 21/16 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A paper product comprising:
a substrate; and
on at least one side of the substrate, a continuous layer of a barrier coating, the barrier coating comprising a binder system, the binder system comprising a latex and a natural binder in a ratio of from about 5:1 to 1:1, and a pigment,
wherein the barrier coating includes from about 40 to 750 parts of the binder system per 100 parts pigment by weight;
such that when the barrier coating is applied to the substrate and dried the barrier coating forms a continuous, void-free grease and oil resistant barrier layer.