US2021053734A1PendingUtilityA1

Polymeric wrapper

60
Assignee: SONOCO DEV INCPriority: Aug 23, 2019Filed: Aug 18, 2020Published: Feb 25, 2021
Est. expiryAug 23, 2039(~13.1 yrs left)· nominal 20-yr term from priority
Inventors:Joseph Donald Gagne
B65D 65/02B32B 2307/5825B32B 27/306B32B 7/12B32B 2553/00B32B 2307/7244B32B 2270/00B32B 7/02B32B 27/08B32B 2250/246B32B 2250/24B32B 27/325B32B 2439/70B32B 27/30B32B 2250/05B32B 2307/7242B32B 2307/732B32B 27/32B32B 2272/00B32B 2250/40B32B 2307/72
60
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Claims

Abstract

In an embodiment, the invention comprises a wrapper with dead bend characteristics. The wrapper comprises a first polyethylene layer comprising low density polyethylene; a second polyethylene layer affixed to the first layer, wherein the second polyethylene layer comprises high density polyethylene; a first tie layer affixed to the second layer, opposite the first layer; a barrier layer affixed to the tie layer, opposite the second layer; a second tie layer affixed to the barrier layer, opposite the first tie layer; a third polyethylene layer affixed to the second tie layer, opposite the barrier layer, wherein the third polyethylene layer comprises high density polyethylene; and a fourth polyethylene layer affixed to the third polyethylene layer, opposite the second tie layer, wherein the fourth polyethylene layer comprises low density polyethylene. In an embodiment, the tie layers and the barrier layer may be substituted with a cyclic olefin copolymer layer.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A wrapper comprising:
 a first polyethylene layer comprising low density polyethylene;   a second polyethylene layer affixed to the first layer, wherein the second polyethylene layer comprises high density polyethylene;   a first tie layer affixed to the second layer, opposite the first layer;   a barrier layer affixed to the tie layer, opposite the second layer;   a second tie layer affixed to the barrier layer, opposite the first tie layer;   a third polyethylene layer affixed to the second tie layer, opposite the barrier layer, wherein the third polyethylene layer comprises high density polyethylene; and   a fourth polyethylene layer affixed to the third polyethylene layer, opposite the second tie layer, wherein the fourth polyethylene layer comprises low density polyethylene;   wherein the wrapper has dead bend characteristics.   
     
     
         2 . The wrapper of  claim 1  wherein when the wrapper is twisted about five hundred and forty degrees, the twisted wrapper substantially retains its twisted state. 
     
     
         3 . The wrapper of  claim 1  wherein after the wrapper is opened, it is reclosed by folding or twisting the wrapper and the wrapper substantially retains the fold or twist configuration. 
     
     
         4 . The wrapper of  claim 1  wherein the first polyethylene layer comprises the outer layer of the wrapper. 
     
     
         5 . The wrapper of  claim 1  wherein the fourth polyethylene layer comprises the inner, food contact layer of the wrapper. 
     
     
         6 . The wrapper of  claim 1  wherein the wrapper is used to package candy, gum, confections, cough drops, or throat lozenges. 
     
     
         7 . The wrapper of  claim 1  wherein the wrapper is used to package a plurality of pieces of candy, gum, confections, cough drops, or throat lozenges. 
     
     
         8 . The wrapper of  claim 1  wherein the thickness of the wrapper is from about 2 to about 4 mils. 
     
     
         9 . The wrapper of  claim 1  wherein the thickness of the wrapper is about 3 mils. 
     
     
         10 . The wrapper of  claim 1  wherein the thickness of the second layer is greater than the thickness of the first layer. 
     
     
         11 . The wrapper of  claim 1  wherein the barrier layer comprises ethylene vinyl alcohol. 
     
     
         12 . The wrapper of  claim 1  wherein the first tie layer and the second tie layer each comprise maleic anhydride. 
     
     
         13 . The wrapper of  claim 1  wherein the first tie layer and the second tie layer each comprise a blend of maleic anhydride and polyethylene. 
     
     
         14 . The wrapper of  claim 1  wherein the barrier layer comprises between about 5% and about 15% of the total thickness of the wrapper. 
     
     
         15 . The wrapper of  claim 1  wherein the tie layers comprise between about 5% and about 15% of the total thickness of the wrapper. 
     
     
         16 . The wrapper of  claim 1  wherein the low density polyethylene layers comprise between about 5% and about 15% of the total thickness of the wrapper. 
     
     
         17 . The wrapper of  claim 1  wherein the high density polyethylene layers comprise between about 40% and about 70% of the total thickness of the wrapper. 
     
     
         18 . The wrapper of  claim 1  wherein the wrapper does not contain foil or paper. 
     
     
         19 . The wrapper of  claim 1  wherein the wrapper does not require the use of a seal or adhesive to close the wrapper. 
     
     
         20 . A wrapper comprising:
 a first polyethylene layer comprising low density polyethylene;   a second polyethylene layer affixed to the first layer, wherein the second polyethylene layer comprises high density polyethylene;   a cyclic olefin copolymer layer affixed to the second layer, opposite the first layer;   a third polyethylene layer affixed to the cyclic olefin copolymer layer, opposite the second polyethylene layer, wherein the third polyethylene layer comprises high density polyethylene; and   a fourth polyethylene layer affixed to the third polyethylene layer, opposite the second tie layer, wherein the fourth polyethylene layer comprises low density polyethylene;   wherein the wrapper has dead bend characteristics.   
     
     
         21 . The wrapper of  claim 20  wherein the cyclic olefin copolymer layer comprises a barrier layer. 
     
     
         22 . The wrapper of  claim 20  wherein the cyclic olefin copolymer layer comprises between about 5% and about 15% of the total thickness of the wrapper. 
     
     
         23 . The wrapper of  claim 20  wherein the low density polyethylene layers comprise between about 5% and about 15% of the total thickness of the wrapper. 
     
     
         24 . The wrapper of  claim 20  wherein the high density polyethylene layers comprise between about 40% and about 70% of the total thickness of the wrapper. 
     
     
         25 . A method for making a wrapper having dead bend characteristics comprising co-extruding:
 a first polyethylene layer comprising low density polyethylene;   a second polyethylene layer affixed to the first layer, wherein the second polyethylene layer comprises high density polyethylene;   a first tie layer affixed to the second layer, opposite the first layer;   a barrier layer affixed to the tie layer, opposite the second layer;   a second tie layer affixed to the barrier layer, opposite the first tie layer;   a third polyethylene layer affixed to the second tie layer, opposite the barrier layer, wherein the third polyethylene layer comprises high density polyethylene; and   a fourth polyethylene layer affixed to the third polyethylene layer, opposite the second tie layer, wherein the fourth polyethylene layer comprises low density polyethylene;   wherein the wrapper has dead bend characteristics.   
     
     
         26 . The method of  claim 25  further comprising twisting the wrapper about five hundred and forty degrees. 
     
     
         27 . The method of  claim 25  wherein the method does not include the use of a seal or adhesive to close the wrapper. 
     
     
         28 . The method of  claim 25  wherein the wrapper does not contain foil or paper.

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