Abstract: The invention relates to a re-closable packaging featuring a container and a cover. The container features a support layer bearing two opposed faces, the innermost face of which is joined to a complexable layer by optionally deposing the face on an outermost face of an optional bonding layer bearing two opposed faces. The optional bonding layer is placed adjacent to a structure featuring: (1) a complexable layer bearing two opposed faces, the innermost face of the optional bonding layer being placed adjacent to the outermost face of the complexable layer, the innermost face of the complexable layer is placed adjacent to an outermost face of (2) a pressure-sensitive adhesive layer bearing two opposed faces, the innermost face of the pressure-sensitive adhesive layer is placed adjacent to a first face of (3) a tearable-welding layer bearing two opposed faces.

Abstract: A multilayer structure, for a re-closable packaging which can be readily and effectively opened and then re-sealed is provided comprising a central pressure-sensitive adhesive layer and two outer layers, one of which is a tearable welding layer, the central adhesive layer comprising two sub-layers and the structure being able to be obtained by collapsing the co-extrusion bubble, together with a packaging comprising at least one tearable film having this symmetrical multilayer structure, and a process for producing the structure and the packaging.

Abstract: Process for depositing at least one thread or tape (3a, . . . 3d), generally a metal thread or tape, in particular made of magnetic material having a high permeability for an antitheft protection system, on a thin sheet (2) especially a plastic, paper or aluminum sheet, this sheet (2) being able to be joined to another sheet (1) with the thread or tape (3a, . . . 3d) sandwiched between them, the sheet (2) thus furnished with the thread or tape being intended subsequently to be wound up into a reel. The thread or tape (3a. . . 3d) is placed on the sheet (2) along a line (S) which is sinuous with respect to the longitudinal direction (D) of the sheet, the parameters (p, a) of the sinuosity being chosen so that, in a reel formed with the sheet, in one and the same plane passing through the axis of the reel, the thread or tape sections lying in two adjacent turns in the reel and in one and the same plane passing through the axis of the reel are offset transversely.