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06-10-2009

Resealable packaging

Reclosable packaging comprises two packaging elements (X) and (Y) bound with one another, where one packaging element exhibits a multi-layer foil comprising an optionally multilayer heat sealable coating (a), a carrier layer (b) and an intermediate pressure sensitive adhesive layer (c) and the second packaging element exhibits a film forming plastic material with or without heat sealable layer. Reclosable packaging comprises two packaging elements (X) and (Y) bound with one another, where one packaging element exhibits a multi-layer foil comprising an optionally multilayer heat sealable coating (a), a carrier layer (b) and an intermediate pressure sensitive adhesive layer (c) and the second packaging element exhibits a film forming plastic material with or without heat sealable layer. The both packaging elements (X) and (Y) are bound over a sealing of the heat sealable layers in such a manner that the heat sealed joint stability in the heat sealed joint area is greater than the adhesion between the pressure sensitive adhesive layer (c) and the multilayer heat sealable coating (a), and/or the adhesion is also greater than the adhesion between the pressure sensitive adhesive layer (c) and the carrier layer (b), and/or the cohesion of the pressure sensitive adhesive layer (c) is less than the heat sealed joint stability and/or each of the mentioned adhesions, so that during the first opening of the packaging, the heat sealable layers (a) are separated itself in the heat sealed joint area optionally together with at least a sublayer piece of the pressure sensitive adhesive layer (c) and are removed from the adjacent not-sealed heat sealable coating, the pressure sensitive adhesive layer is laid open there and after withdrawal of a part of the filler, a reclosable of the packaging is enabled by press-on, where at least on the border of the heat-sealed joint near to the packed filler, at least in the area of the opening aid, at least a weakening is available for heat sealed joint in essentially parallel to the multi-layer foil exhibiting the pressure sensitive adhesive layer (c) in the form of micropores produced by laser ray effect in the heat sealable layer (a). An independent claim is included for a procedure for producing the reclosable packaging by using a multi-layer foil containing the pressure sensitive adhesive layer (c) in the form of consecutive sheeting for producing a packaging element (X) or (Y), where: the multilayer foil exhibits at least a weakening in the form of micropores aligned with the help of laser radiation introduced in the heat sealable coating, at least in the area of the not deformed boundary area of the packaging, provided as opening aid, and packaging containers, preferably packaging troughs are produced by thermoforming, preferably by deep drawing and are closed and subsequently opened after filling with the filler, with the sealable multilayer foil or the film forming plastic material exhibiting no heat sealable coating, as cover.

Document: EP2067717A1
Click here for the full patent text at DEPATISnet [PDF]
Published patent application
Disclosure date: 10-02-2007
Publication date: 06-10-2009
Applicant: WIPAK WALSRODE GMBH & CO KG, DE
Inventor: JACOBSEN SVEN DR, DE ; NELKE DORIT DR, DE


© European Patent Office. This information was obtained from the espacenet of the European Patent Office. There is no guarantee of its correctness or curency. For additional information, please use the research at espacenet. It is possible to determine the current legal and procedural status of patents and utility patents/models at http://worldwide.espacenet.com/ kfree of charge.

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