Westrock Mwv, LLC

Meadwestvaco Corporation

Scott E Ginther

Gary P Fugitt

Steven G Bushhouse

Terrell J Green

Steven Parker

Wei-Hwa Her

Jason Richard Hogan

Steven Paul Metzler

John W Stolarz, Jr

Stanley H McGrew, Jr

Robert W Carlson

Steve G Bushhouse

Jr Stanley H Mcgrew

Steven P Metzler

A coated paper or paperboard structure includes a paper or paperboard substrate and a basecoat applied to the paper or paperboard substrate to yield a basecoat outer surface. The basecoat includes a water-soluble polymer binder and pigment.

Coated paper and paperboard structures

Coatings are disclosed which provide single-layer-coated paperboard having good smoothness and printability. Low density organic pigments (LDOP) are used in some of the coatings. Certain coatings when applied as single-layer coatings at 6 lb/3000 ft(9.8 g/m) and higher gave Parker PrintSurf values less than 2.5 microns. Certain coatings when applied as base coats and then top coated gave PrintSurf values less than 2.0 microns for uncalendered samples.

Paperboard with low coat weight and high smoothness

Paper and paperboard coatings are disclosed using a modified clay which is characterized by an average shape factor less than 60, a sediment void volume greater than 48%, and containing less than 30% by mass of particles less than 1 micron in diameter.

Coatings using clays with low packing density

A paper or paperboard including a cellulose substrate and a coating applied to each side of the paperboard substrate to form a coated structure, the coated structure having a basis weight, a caliper thickness and a Parker Print Surf smoothness, the Parker Print Surf smoothness being at most about 2 microns, the basis weight being less than about Y1 pounds per 3000 ft2, wherein Y1 is a function of the caliper thickness (X) in points and is calculated as follows:1=29.15+11.95&#x2212;0.074152.

Low density paper and paperboard with two-sided coating

A paper or paperboard including a cellulose substrate and a coating applied to each side of the paperboard substrate to form a coated structure, the coated structure having a basis weight, a caliper thickness and a Parker Print Surf smoothness, the Parker Print Surf smoothness being at most about 2 microns, the basis weight being less than about Ypounds per 3000 ft2, wherein Yis a function of the caliper thickness (X) in points and is calculated as follows: Y=29.15+11.95X&#x2212;0.07415X2.

A method for treating a substrate is described. In accordance with one aspect, the method includes applying a polymer coating to a substrate, and bringing the polymer coating into contact with a heated surface in a pressure nip while the coating is still in a wet state. Optionally the polymer coating may include a crosslinkable material, and a crosslinking agent may be used to promote crosslinking. The polymer coating replicates the heated surface. A product produced in accordance with the described method is also disclosed. The product is characterized by having subsurface voids within the coating.

Method for treating a substrate

A paperboard including a solid bleached sulfate paperboard substrate and a coating applied to the paperboard substrate to form a coated structure, the coated structure having a basis weight, a caliper thickness and a Parker Print Surf smoothness, the Parker Print Surf smoothness being at most about 3 microns, the basis weight being at most about Ypounds per 3000 ft, wherein Yis a function of the caliper thickness (X) in points and is calculated as follows: Y=3.79+13.43X&#x2212;0.1638X.

Growing community of inventors

Willow Spring, NC, United States of America

Scott E Ginther