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US 2025/0144909 A1Published application
Multilayer film for tear-open packages
AssigneeAdapa Digital Gesmbh
InventorsStefan ZOISTER, Manfred HOCH, Tobias WEGMANN
Life of this patent
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Abstract
The invention relates to a multilayer film for tear-open packages, the film comprising at least one laser-removable carrier layer and at least one barrier layer. According to the invention, at least one laser stop layer for protecting the at least one barrier layer from removal of the at least one barrier layer by a laser is located between the at least one carrier layer and the at least one barrier layer.
Claims15
1-12. (canceled)
A multilayer film for tear-off packaging, comprising:
- at least one laser-ablatable support layer;
- at least one barrier layer;
- and
- at least one laser stop layer for protecting the at least one barrier layer from ablation of the at least one barrier layer by a laser arranged between the at least one support layer and the at least one barrier layer.
1 more element
A method for forming a weakened area in a multilayer film with a laser, comprising:
- ablating by the laser at least one support layer of the multilayer film in a weakened area;
- striking by the laser strikes at least one laser stop layer arranged between the at least one support layer and at least one barrier layer in the weakened area;
- wherein the laser power in the at least one laser stop layer is locally attenuated in such a way that the at least one barrier layer is not ablated by the laser.
Dependencies are inferred from the claim text.