| 摘要 |
This invention relates to a multilayer tamper-evident label comprising: (A) a first and second layer of polymeric film, wherein each layer has an upper and lower surface and the lower surface of the first layer contacts the upper surface of the second layer at a separation interface, (B) a heat-sealable layer, having an upper and lower surface, wherein the lower surface of the heat-sealable layer is bonded to the upper surface of the first layer, and (C) an adhesive layer, having an upper and lower surface, wherein the upper surface of the adhesive layer is bonded to lower surface of the second layer. In another aspect the invention relates to an article overwrapped in a packaging wrap material and having the tamper evident label inside and bonded to the packaging wrap. In another embodiment, the invention relates a method of preparing a multilayer tamper evident label comprising the steps of (A) coextruding a film having a heat sealable layer, a first layer and a second layer each having an upper and lower surface, wherein the lower surface of the first layer contacts the upper surface of the second layer at a separation interface and the upper surface of the first layer is bonded to the lower surface of the heat sealable layer, and (B) forming an adhesive layer with an upper and lower surface, where upper surface of the adhesive layer is bonded to the lower surface of the second layer. The multilayer tamper evident label provides information about the integrity of the packaging. The label and method afford evidence of tampering and/or repackaging of an article.
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