Multi-layer sheet structure, method of making same and containers made therefrom
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United States of America Patent
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-
Apr 21, 1987
Issued Date -
N/A
app pub date -
Oct 2, 1984
filing date -
May 29, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multi-layer paperless sheet structure having an oriented substructure is provided for making tubular containers for packaging dentrifice and other products. The sheet structure comprises a unique combination of polymer layers, including a uniaxially oriented polymer (polypropylene or high density polyethylene) layer. The sheet structure has two exterior heat sealable surfaces for forming the tubular containers by lap heat seal and the resulting containers exhibit improved strength and deadfold retention properties. A method is also provided for forming the sheet structure with its oriented substructure.
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