AT505451B1 - IMPACT-RESISTANT PACKAGING FOIL FOR SOLID, LIQUID OR GASEOUS GOODS - Google Patents

Abstract

The invention relates to a security packaging film, comprising a carrier substrate which has at least one security feature, characterized in that the carrier substrate comprises an optically active element consisting of a hologram, a surface relief, a diffraction grating or a kinegram having a partially transparent reflector, the a metal or a metal oxide or metal sulfide layer or an alloy and is interrupted to produce the partial transparency in the form of lines, guilloches, grids, screen angle modulations or Moireeffekten or codes and their use

Description

Austrian Patent Office AT 505 451 B1 2011-07-15

IMPACT-RESISTANT PACKAGING FOIL FOR SOLID, LIQUID OR GASEOUS GOODS

Description: [0001] The invention relates to a packaging film for solid, liquid or gaseous goods, in particular for strip or sachet packs.

For packaging of solid, liquid or gaseous goods, it is desirable for Qualitätsan-demand, convenience, marketing or information reasons that visible to users, consumers, wholesalers or sellers the contents of a package without opening the package with the naked eye is.

However, the problem of counterfeiting, unauthorized manufacturing or other counterfeiting, falsification or unauthorized imports, re-imports and the like also require to provide the packaging with clearly recognizable, counterfeit-proof features that can prove the originality and the origin of the packaged product and detectable.

For this purpose, labels are essentially used, which are applied to the package. However, these labels need to be placed in separate steps on the packaging, thus causing additional manufacturing costs.

Likewise, some forms of packaging are poor or not at all suitable for receiving labels, especially on small packaging forms labels that have all the necessary information, because of the necessary size are difficult to apply.

In addition, labels can be removed by appropriate measures, such as peeling after freezing or suitable mechanical or chemical solvents, and applied to other packaging or substrates again.

JP 2005153978 A discloses a material which has a hologram and can be used for bags and pouches packaging, wherein the reflector in the region of the hologram is present over its entire surface, between the hologram embossing, the reflector may be partially transparent. In contrast, the reflector according to the present application is also partly transparent in the area of the holograms.

FR 2852267 A discloses a multi-layered structure, which may have a transparent colored lacquer layer in which, however, is no hologram embossing. The hologram embossing is present here in a separate embossing lacquer layer.

The object of the invention is therefore to provide a packaging film or packaging that is at least partially transparent and tamper-proof and at the same time has no restrictions on the design of the package.

The invention is therefore a security packaging film, comprising a carrier substrate having at least one security feature, characterized in that the carrier substrate comprises an optically active element consisting of a hologram, a surface relief, a diffraction grating or a kinegram, which is a partially transparent Reflector, which consists of a metal or a metal oxide or metal sulfide layer or an alloy and is interrupted to produce the partial transparency in the form of lines, guilloches, grids, screen angle modulations or Moireeffekten or codes.

As a carrier substrate, for example, flexible, semi-rigid or rigid plastic films, such as PI, PP, OPP, PE, PPS, PEEK, PEK, PEI, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, fluoropolymers such as Teflon, PVB, etc. in question.

The carrier films preferably have a thickness of 5 - 700 pm, preferably 5 - 200 pm, Austrian Patent Office AT 505 451 B1 2011-07-15 particularly preferably 5 - 50 gm.

For the production of the security feature is initially UV-curable possibly applied with suitable pigments (for example) yellow-colored paint. Subsequently, for example, a surface structure can be produced by molding a matrix into this lacquer, which is pre-cured to the gel point at the time of the impression, whereupon the radiation-curable lacquer is then completely cured after application of the surface structure.

By the use of UV-curable varnish applied thereto after curing layers, even an optionally introduced surface structure, even under temperature load stable.

The radiation-curable lacquer can contain, for example, a radiation-curable lacquer system based on a polyester, an epoxy or polyurethane system which contains 2 or more different photoinitiators familiar to the person skilled in the art, which can initiate curing of the lacquer system to varying degrees at different wavelengths. Thus, for example, a photoinitiator can be activated at a wavelength of 200 to 400 nm, the second photoinitiator then at a wavelength of 370 to 600 nm. Between the activation wavelengths of the two photoinitiators sufficient difference should be maintained, so that not too strong excitation of the second photoinitiator takes place while the first is activated. The region in which the second photoinitiator is excited should be in the transmission wavelength range of the carrier substrate used. For the main curing (activation of the second photoinitiator) also electron radiation can be used.

As a radiation-curable paint and a water-dilutable paint can be used. Preference is given to polyester-based paint systems.

The surface structure is then provided with a metallic layer or a metallic appearing layer, which is then ultrafine demetallized.

For this purpose, a color layer in the form of lines guilloches, grids, screen angle modulations or Moireeffekten or codes or similar security printing elements is applied partially.

The application of the paint can be done by any method, such as gravure, flexographic, screen, digital printing and the like.

The color or the paint used is soluble in a solvent, preferably in water, but it can also be used in any solvent, for example in alcohol, esters and the like soluble color. The color or the colored lacquer can be customary compositions based on natural or artificial macromolecules. The soluble color may be pigmented or unpigmented. As pigments, all known pigments can be used. Particularly suitable are TiO 2, ZnS, kaolin and the like.

Subsequently, the printed carrier substrate is treated by means of an in-line plasma (low pressure or atmospheric plasma), corona or flame process. High-energy plasma, for example Ar or Ar / O 2 plasma, cleans the surface of toning residues of the printing inks. The necessary sharp delimitation of the contours of the recesses, which is necessary for the necessary precision of the coding is achieved. At the same time, the surface is activated. In this case, terminal polar groups are generated on the surface. This improves the adhesion of metals and the like to the surface.

Optionally, simultaneously with the application of the plasma or corona or flame treatment, a thin metal or metal oxide layer can be applied as a primer, for example by sputtering or vapor deposition. Particularly suitable are Cr, Al, Ag, Ti, Cu, TiO 2, Si oxides or chromium oxides. This adhesion promoter layer generally has a thickness of 0.1 nm to 5 nm, preferably 0.2 nm to 2 nm, particularly preferably 0.2 to 1 nm. 2.3