US2025333907A1PendingUtilityA1

Coated cellulosic structures and method for manufacturing thereof

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Assignee: WESTROCK MWV LLCPriority: Apr 10, 2024Filed: Apr 10, 2025Published: Oct 30, 2025
Est. expiryApr 10, 2044(~17.7 yrs left)· nominal 20-yr term from priority
Inventors:Rahul BhardwajJustin L. BennettZack SimoncelliJiebin PangMohammadtaghi Savoji
D21H 27/10D21H 19/30D21H 19/22D21H 21/28D21H 19/82D21H 19/38D21H 19/84D21H 21/16D21H 19/44D21H 19/12
56
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Claims

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.

Claims

exact text as granted — not AI-modified
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.

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