Coated paperboard containers having an aqueous barrier coating

Patent metadata

Field	Value
Publication number	US-11767639-B2
Application number	US-202016733755-A
Country	US
Kind code	B2
Filing date	Jan 3, 2020
Priority date	Jan 17, 2019
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

Abstract

A coated paperboard container includes a paperboard substrate and an aqueous barrier coating on the paperboard substrate. The coated paperboard container has a repulpability yield of 75% accepts or greater, a sidewall seam bond strength of 30 pounds per inch or greater, and a wet rigidity loss of 50% or less.

First claim

What is claimed is:

1. A coated paperboard container for holding beverages, comprising:
a paperboard substrate, the paperboard substrate defining a container wall having an interior surface facing an interior of said container and an exterior surface facing an exterior of said container;
a heat sealable aqueous barrier coating on the interior surface of the paperboard substrate, wherein the heat sealable aqueous barrier coating consists essentially of binder and pigment; and
at least one of another aqueous barrier coating and a non-barrier coating on the exterior surface of the paperboard substrate,
wherein the coated paperboard container has a repulpability yield of 75% accepts or greater and a wet rigidity loss of 50% or less.

2. The coated paperboard container of claim 1 , wherein the coated paperboard container has a repulpability yield of 80% accepts or greater.

3. The coated paperboard container of claim 1 , wherein the coated paperboard container has a repulpability yield of 85% accepts or greater.

4. The coated paperboard container of claim 1 , wherein the coated paperboard container has a repulpability yield of 90% accepts or greater.

5. The coated paperboard container of claim 1 , wherein the coated paperboard container has a sidewall seam bond strength of 30 pounds per inch or greater.

6. The coated paperboard container of claim 1 , wherein the coated paperboard container has a sidewall seam bond strength of 40 pounds per inch or greater.

7. The coated paperboard container of claim 1 , wherein the coated paperboard container has a sidewall seam bond strength of 50 pounds per inch or greater.

8. The coated paperboard container of claim 1 , wherein the coated paperboard container has a wet rigidity loss of 40% or less.

9. The coated paperboard container of claim 1 , wherein the coated paperboard container has a wet rigidity loss of 30% or less.

10. The coated paperboard container of claim 1 , wherein the coated paperboard container has a wet rigidity loss of 20% or less.

11. The coated paperboard container of claim 1 , wherein the coated paperboard container has a wet rigidity loss of 10% or less.

12. The coated paperboard container of claim 1 , wherein the coated paperboard container has a 30 minute water Cobb test of 20 g/m 2 or less.

13. The coated paperboard container of claim 1 , wherein the coated paperboard container has a 30 minute water Cobb test of 10 g/m 2 or less.

14. The coated paperboard container of claim 1 , wherein the coated paperboard container has a 30 minute water Cobb test of 5 g/m 2 or less.

15. The coated paperboard container of claim 1 , wherein the coated paperboard container has a staining brightness loss of 20% or less.

16. The coated paperboard container of claim 1 , wherein the coated paperboard container has a staining brightness loss of 10% or less.

17. The coated paperboard container of claim 1 , wherein the coated paperboard container has a staining brightness loss of 5% or less.

18. The coated paperboard container of claim 1 , wherein the coated paperboard container has a blocking rating of 3.5 or less.

19. The coated paperboard container of claim 1 , wherein the coated paperboard container has a blocking rating of 3.0 or less.

20. The coated paperboard container of claim 1 , wherein the coated paperboard container has a blocking rating of 2.0 or less.

21. The coated paperboard container of claim 1 , wherein the coated paperboard container has a fiber tear of 80% or greater when the container seams are separated.

22. The coated paperboard container of claim 1 , wherein the coated paperboard container has a fiber tear of 90% or greater when the container seams are separated.

23. A coated paperboard container for holding hot beverages, comprising:
a sidewall comprising:
a sidewall paperboard substrate having an interior surface facing an interior of said container and an exterior surface facing an exterior of said container, an upper end, a lower end, a first longitudinal end, and a second longitudinal end;
a first aqueous barrier coating on the interior surface of the sidewall paperboard substrate, wherein the first aqueous barrier coating consists essentially of binder and pigment, wherein the first longitudinal end of the sidewall paperboard substrate is heat sealed, by way of the first aqueous barrier coating, to the second longitudinal end of the sidewall paperboard substrate to form a sidewall seam; and
a non-barrier coating on the exterior surface of the sidewall paperboard substrate,

wherein the coated paperboard container has a repulpability yield of 75% or greater, a side seam bond strength of 30 pounds per inch or greater, and a wet rigidity loss of 20% or less.

24. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a repulpability yield of 80% accepts or greater.

25. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a repulpability yield of 85% accepts or greater.

26. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a repulpability yield of 90% accepts or greater.

27. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a sidewall seam bond strength of 40 pounds per inch or greater.

28. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a sidewall seam bond strength of 50 pounds per inch or greater.

29. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a wet rigidity loss of 10% or less.

30. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a 30 minute water Cobb test of 20 g/m 2 or less.

31. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a 30 minute water Cobb test of 10 g/m 2 or less.

32. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a 30 minute water Cobb test of 5 g/m 2 or less.

33. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a staining brightness loss of 20% or less.

34. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a staining brightness loss of 10% or less.

35. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a staining brightness loss of 5% or less.

36. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a blocking rating of 3.5 or less.

37. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a blocking rating of 3.0 or less.

38. The coated paperboard container for holding hot beverages of claim 23 , wherein the coated paperboard container has a blocking rating of 2.0 or

Assignees

• Westrock Mwv Llc

Inventors

• Parker Steven
• Pang Jiebin
• Melton Natasha G
• Krug Teresa
• Giuste Sergio A
• Harris Wade
• Green Terrell J

Classifications

• D21H19/826 Primary

  two superposed coatings, the first applied being pigmented and the second applied being non-pigmented · CPC title

• D21H19/24

  comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• D21H19/84

  on both sides of the substrate · CPC title

• D21H25/06

  of impregnated or coated paper (D21H25/08 takes precedence) · CPC title

• B65D3/08

  having a cross-section of varying shape, e.g. circular merging into square or rectangular · CPC title