US 12,281,442 B2
Paperboard products with improved rigidity and moisture barrier properties
Mark Hunter, Green Bay, WI (US); Jason Laatsch, Shawano, WI (US); Joe Sommers, Pulaski, WI (US); Chad Robenhorst, Appleton, WI (US); Kyle Miller, Hobart, WI (US); Randy DeCoster, Gillett, WI (US); Chad Hildebrandt, Greenville, WI (US); Breanna Van Nuland, Oconto, WI (US); Cory Christopherson, Embarrass, WI (US); and Sarah Millies, Georgetown, WI (US)
Assigned to Hoffmaster Group, Inc., Clintonville, WI (US)
Filed by Hoffmaster Group, Inc., Clintonville, WI (US)
Filed on Apr. 26, 2023, as Appl. No. 18/307,676.
Claims priority of provisional application 63/434,411, filed on Dec. 21, 2022.
Claims priority of provisional application 63/433,754, filed on Dec. 19, 2022.
Claims priority of provisional application 63/338,481, filed on May 5, 2022.
Claims priority of provisional application 63/334,825, filed on Apr. 26, 2022.
Prior Publication US 2023/0340729 A1, Oct. 26, 2023
Int. Cl. B32B 3/02 (2006.01); A47G 19/03 (2006.01); D21H 13/30 (2006.01); D21H 17/28 (2006.01); D21H 19/24 (2006.01); D21H 19/74 (2006.01); B31B 50/59 (2017.01)
CPC D21H 13/30 (2013.01) [A47G 19/03 (2013.01); D21H 17/28 (2013.01); D21H 19/24 (2013.01); D21H 19/74 (2013.01); B31B 50/592 (2018.05)] 18 Claims
OG exemplary drawing
 
1. A rigid paperboard product comprising at least one amylopectin and at least one crosslinker,
wherein the at least one amylopectin is present in an amount ranging from 2% to 15% by weight of the paperboard product,
wherein the at least one crosslinker is present in an amount ranging from 0.5% to 8% by weight based on the dry weight of the starch content in the paperboard product, and
wherein the paperboard product has a rigidity value ranging from 375 to 500.