Tamper evident flow wrap

Details Tamper evident flow wrap Tamper evident flow wrap

2007-07-17

2007-07-17

Zirker, Daniel (Department: 1771)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

C428S916000, C428S915000, C428S343000, C428S913000

Reexamination Certificate

active

10880926

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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