Container with absorptive patch

Abstract

A container for particulate material includes a can end including a recessed concavity integrally formed in the can end and open to an inner chamber of the container. An absorptive material is disposed in the concavity. The absorptive material may absorb oxygen, moisture vapor, or both. At least one barrier layer is disposed between the concavity and the chamber.

What is claimed is: 
     
         1 . A container, comprising:
 a sidewall defining an interior chamber;   a can end attached to the sidewall, the can end including a recessed concavity integrally formed in the can end, and wherein the concavity is open to the chamber;   an absorptive material disposed within the concavity, wherein the absorptive material is oxygen absorptive, moisture vapor absorptive, or both; and   at least one barrier layer disposed between the concavity and the chamber.   
     
     
         2 . The container of  claim 1 , wherein the at least one barrier layer comprises a gas barrier layer and a second barrier layer, and wherein the gas barrier layer faces the interior chamber and the second barrier layer faces the concavity. 
     
     
         3 . The container of  claim 2 , wherein the gas barrier layer comprises a metal layer disposed on a polymer layer. 
     
     
         4 . The container of  claim 2 , wherein the second barrier layer comprises an oxygen or moisture permeable material. 
     
     
         5 . The container of  claim 2 , wherein the gas barrier layer includes a plurality of apertures. 
     
     
         6 . The container of  claim 1 , wherein the can end includes a center, and wherein the concavity is disposed on the center. 
     
     
         7 . The container of  claim 1 , wherein the oxygen absorptive material is granular. 
     
     
         8 . A can end, comprising:
 a body including a shallow concave depression;   an absorptive material disposed in the depression, wherein the absorptive material is oxygen absorptive, moisture vapor absorptive, or both; and   at least one barrier layer covering the absorptive material, wherein the at least one barrier layer is attached to the body.   
     
     
         9 . The can end of  claim 8 , wherein the at least one barrier layer comprises a gas barrier layer and a second barrier layer. 
     
     
         10 . The can end of  claim 9 , wherein the gas barrier layer is constructed of a metalized film, and wherein the second barrier layer is constructed of an oxygen or moisture vapor permeable material. 
     
     
         11 . The can end of  claim 8 , wherein the body includes a medial portion, and wherein the shallow concave depression is positioned in the medial portion. 
     
     
         12 . The can end of  claim 8 , wherein the body and the depression each include a circular profile. 
     
     
         13 . The can end of  claim 8 , wherein the depression includes a depression depth and a cross-sectional depression length, and wherein the depression depth is from 1% to 25% of the cross-sectional depression length. 
     
     
         14 . The can end of  claim 8 , wherein the body includes a body cross-sectional area, and wherein the depression includes a depression cross-sectional area of from 2.5% to 50% of the body cross-sectional area. 
     
     
         15 . A method of manufacturing an absorptive container, comprising:
 providing a can end including a shallow cavity, the cavity including an absorptive material covered by at least one barrier layer, wherein the absorptive material is oxygen absorptive, moisture vapor absorptive, or both; and   securing the can end to a container.   
     
     
         16 . The method of  claim 15 , further comprising puncturing the at least one barrier layer. 
     
     
         17 . The method of  claim 16 , further comprising filling the container, wherein the puncturing is prior to the filling of the container. 
     
     
         18 . The method of  claim 16 , wherein the puncturing includes exposing the absorptive material to an interior chamber of the container. 
     
     
         19 . The method of  claim 18 , wherein the puncturing includes laser-etching a plurality of apertures in the at least one barrier layer. 
     
     
         20 . The method of  claim 15 , wherein the at least one barrier layer includes a metalized film and an oxygen permeable or moisture vapor permeable second layer.