Thermoformable, multi-layer plastic sheet having gas barrier properties
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United States of America Patent
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-
Jul 21, 1987
Grant Date -
N/A
app pub date -
Sep 19, 1985
filing date -
Sep 26, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A thermoformable, multi-layer plastic sheet with gas barrier properties is disclosed having an inner gas barrier layer, a glue layer applied to either side of the gas barrier layer and layers of a polyolefin composition bonded to the glue layers. To increase the tensile strength of the sheet during heating for the purpose of thermoforming, a second polyolefin layer is bonded to at least one of the two polyolefin layers, the second polyolefin layer having a lower melt index than the layer of the polyolefin composition beneath it.
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