Method and apparatus for producing gas impermeable, chemically inert container structures for food and volatile substances
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United States of America Patent
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Oct 21, 1997
Grant Date -
N/A
app pub date -
Feb 1, 1996
filing date -
Oct 28, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of making a gas-impermeable, chemically inert container wall structure comprising the steps of providing a base layer of an organic polymeric material; conducting a pair of reactive gases to the surface of the base layer preferably by pulsed gas injection; heating the gases preferably by microwave energy pulses sufficiently to create a plasma which causes chemical reaction of the gases to form an inorganic vapor compound which becomes deposited on the surface, and continuing the conducting and heating until the compound vapor deposit on the surface forms a gas-impermeable, chemically inert barrier layer of the desired thickness on the surface. Various wall structures and apparatus for making them are also disclosed.
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