Tamper evident flow wrap
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United States of America Patent
Stats
-
Jul 17, 2007
Grant Date -
Jan 6, 2005
app pub date -
Jun 30, 2004
filing date -
Jul 2, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tamper evident packaging material is described. The material is formed from a substrate having a weak skin layer and at least one additional layer. A pressure sensitive adhesive is applied to the weak skin layer. An electron beam cured coating having a non-migratory slip agent is disposed on the surface of the substrate opposite the weak skin layer. The weak skin layer has a lower Z tear strength than the affinity that the pressure sensitive adhesive has for itself and for the weak skin layer, such that at least part of the weak skin layer separates from the at least one additional layer when the pressure sensitive adhesive is sealed against the weak skin layer of a second substrate and the two substrates are subsequently pulled apart.
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