White opaque opp film for tamper evident package
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United States of America Patent
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Jun 5, 1990
Grant Date -
N/A
app pub date -
Jun 14, 1989
filing date -
Jun 14, 1989
priority date (Note) -
Expired
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Abstract
A tamper-evident film includes a hydrocarbon polymer core layer (a) having an upper face and a lower face; an oriented tamper-evident layer applied to at least the lower face of core layer (a), layer (b) being fabricated from a mixture of a polyolefin and a filler of particles which induce cavitation upon orientation, layer (b) having an internal cohesiveness which is less than the internal cohesiveness and bonding strength of packaging adhesives and heat seals; and, an oriented skin layer (c) applied to the upper face of core layer (a) if layer (b) has not been applied thereon, layer (c) being hydrocarbon polymer. A tamper-evident package seal and package are also provided.
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