Coated cellulosic structures and method for manufacturing thereof

Patent metadata

Field	Value
Publication number	US-2025333907-A1
Application number	US-202519175822-A
Country	US
Kind code	A1
Filing date	Apr 10, 2025
Priority date	Apr 10, 2024
Publication date	Oct 30, 2025
Grant date	—

Abstract

A coated cellulosic structure including a cellulosic substrate having a first major surface and a second major surface and a printability coating on the first major surface of the cellulosic substrate. A moisture vapor barrier coating is disposed on the second major surface of the cellulosic substrate. A primer coating is disposed on the printability coating at a sealing area of the coated cellulosic structure. An overprint water barrier coating is disposed on the printability coating at a non-sealing area of the cellulosic structure.

First claim

What is claimed is:

1 . A coated cellulosic structure, comprising:
a cellulosic substrate having a first major surface and a second major surface; a printability coating on the first major surface of the cellulosic substrate; a moisture vapor barrier coating on the second major surface of the cellulosic substrate; a primer coating on the printability coating at a sealing area; and an overprint water barrier coating on the printability coating at a non-sealing area.

2 . The coated cellulosic structure of claim 1 in a form of a roll of cellulosic material, a cellulosic blank, a container component, or a container.

3 . The coated cellulosic structure of claim 1 wherein the printability coating is on an entirety of the first major surface.

4 . The coated cellulosic structure of claim 1 wherein the moisture vapor barrier coating is on an entirety of the second major surface.

5 . The coated cellulosic structure of claim 1 wherein the moisture vapor barrier coating comprises polyethylene.

6 . The coated cellulosic structure of claim 1 wherein the moisture vapor barrier coating comprises high density polyethylene having a density in a range of between 0.93 and 0.97 g/cm 3 .

7 . The coated cellulosic structure of claim 1 , wherein the primer coating comprises an aqueous primer coating.

8 . The coated cellulosic structure of claim 1 , wherein the primer coating comprises one or more chemical groups of imine, amides, urethanes, polyester, acrylics, and olefins.

9 . The coated cellulosic structure of claim 1 , wherein the primer coating comprises polyethyleneimine (PEI).

10 . The coated cellulosic structure of claim 1 wherein the sealing area is at least one of a sidewall seam sealing area and a rim sealing area.

11 . The coated cellulosic structure of claim 1 wherein the primer coating is on an entirety of the printability coating.

12 . The coated cellulosic structure of claim 1 wherein the primer coating is disposed selectively on the printability coating at the sealing area.

13 . The coated cellulosic structure of claim 1 wherein the overprint water barrier comprises an aqueous overprint water barrier coating.

14 . The coated cellulosic structure of claim 1 , wherein the overprint water barrier coating comprises an acrylic material.

15 . The coated cellulosic structure of claim 1 wherein the overprint water barrier coating is disposed selectively on the printability coating at the non-sealing area.

16 . The coated cellulosic structure of claim 1 wherein the primer coating is on an entirety of the printability coating and the primer coating underlies the overprint water barrier coating at the non-sealing area.

17 . The coated cellulosic structure of claim 1 further comprising a printed ink layer between the printability coating and the overprint water barrier coating.

18 . The coated cellulosic structure of claim 1 further comprising a printed ink layer between the primer coating and the overprint water barrier coating.

19 . The coated cellulosic structure of claim 1 further comprising a printed ink layer between the printability coating and the primer coating.

20 . A method for manufacturing a coated cellulosic structure, the method comprising:
providing a cellulosic substrate having a first major surface and a second major surface and having a printability coating on the first major surface of the cellulosic substrate; coating a moisture vapor barrier layer on the second major surface of the cellulosic substrate; coating a primer layer on the printability coating at a sealing area; and coating an overprint water barrier layer on the printability coating at a non-sealing area.

Assignees

• Westrock Mwv Llc

Inventors

• Bhardwaj Rahul
• Bennett Justin L
• Simoncelli Zack
• Pang Jiebin
• Savoji Mohammadtaghi

Classifications

• D21H27/10

  Packing paper (packaging materials of special type or form B65D65/38) · CPC title

• D21H19/30 Primary

  Polyamides; Polyimides · CPC title

• D21H19/22

  Polyalkenes, e.g. polystyrene · CPC title

• D21H21/28

  Colorants {; Pigments or opacifying agents} · CPC title

• D21H19/82

  superposed {(D21H19/84 takes precedence)} · CPC title