Method of and apparatus for making plastic film with barrier layers
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United States of America Patent
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Jan 6, 1998
Issued Date -
N/A
app pub date -
Apr 30, 1996
filing date -
Sep 29, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A plastic wrapping film is provided with one or more aluminum layers by vapor deposition and the or each layer is only partially oxidized in an oxidizing plasma so that the resulting barrier layer is distinguishable by slight reduction in transparency but excellent prevention of penetration by moisture and oxygen.
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Cited Art Landscape
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