Tamper evident composite film
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United States of America Patent
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Apr 17, 2012
Grant Date -
May 7, 2009
app pub date -
Nov 6, 2007
filing date -
Nov 6, 2007
priority date (Note) -
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Abstract
A tamper evident composite film is disclosed. The composite film contains a first film layer made from polyester adjacent to a second film layer made from a polyolefin, such as a low density polyethylene. If desired, the composite film can further include a third film layer positioned on the opposite side of the second film layer. The composite film is produced through a coextrusion process. In one embodiment, the composite film can be biaxially stretched prior to use. The composite film is constructed so that the first film layer will delaminate from the second film layer when the composite film is tampered with or otherwise mishandled.
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