EP2285558B1 - Packaging-film section, packaging film, packaging and packaging/product unit - Google Patents

Description

The invention relates to a packaging film, in particular for producing a packaging, having at least one packaging film section, the packaging film section comprising a single-layer or multi-layered substrate and a printed functional layer formed of a printable material and at least partially forming an outer layer of the packaging film section is designed to have antimicrobial and / or oxygen scavenging properties.

Furthermore, the invention relates to a packaging, in particular a food packaging or a pharmaceutical packaging as well as a packaging product unit, comprising at least one product packed in a packaging.

There are known coatings for food packaging, which are used to protect the packaged food from attack by microorganisms such as bacteria, fungi or other germs. As is clear from the WO 20067/133754 A1 results, two fundamentally different functional principles of antimicrobial layers are known.

The first principle of operation is characterized by the fact that the antimicrobial agents and inhibitors integrated in the layer are volatile and are released over time from a Materixmaterial of the layer, whereby the antimicrobial effect not only in the close range of the coated Surface but in the entire packaging volume arises.

The second functional principle is characterized in that the antimicrobial active substances and inhibitors in the functional layer are spatially fixed in such a way that they can not escape from the carrier layer independently. The antimicrobial effect unfolds in such functional layers only by a direct contact of the packaged goods with the antimicrobially coated surface.

The WO 2006/133754 A1 describes an advanced method by which a technical surface can be made with an antimicrobial agent releasing layer. In this case, a solution of polyvinyl acetate, a preservative and a solvent is applied to the technical surface and dried on the technical surface to form the antimicrobial layer.

In addition to the functional layers with antimicrobial action described above, functional layers are known in which chemical compounds are integrated, which absorb oxygen and permanently bind chemically. Such chemical compounds are referred to as oxygen scavengers. Often the function of these scavengers is to create and maintain an oxygen-free atmosphere in the package to ensure extended shelf life of the package. For this purpose, the direct connections on the one hand remove the remaining oxygen, which is located in the packaging space, as quickly as possible, on the other hand provide the Compounds, if incorporated into the outer packaging material, provide an active barrier to oxygen migrating from outside into the packaging.

The WO 2007/051860 A1 now describes a novel paint material having an oxygen scavenging property. This comprises a matrix consisting of organic polymers and at least one component that is reactive to oxygen after appropriate triggering.

The functional layers described above (antimicrobial layers / oxygen-absorbing layers) have proven particularly useful in food packaging and pharmaceutical packaging. However, difficulties often arise in the integration of such functional layers in packaging material, in particular when the functional layer, in order to achieve the desired effect, must have direct contact with the packaged product and / or the packaging volume. In order to be able to realize this, the functional layer, in addition to its antimicrobial and / or oxygen-absorbing property, would have to be sealable in order to be able to seal the packaged goods moisture and / or airtight. In the case of non-sealable functional layers, there would only be the possibility of covering them over the entire surface with a sealable layer, whereby, however, the immediate packaging material contact would be lost and the functional effect of the functional layer would be at least reduced.

The invention is therefore based on the object of proposing a packaging film with a packaging film section, comprising an antimicrobial and / or oxygen scavenging property having functional layer, at least partially forms an outer layer of the packaging film and yet does not have to be sealable.

This object is achieved in the case of a previously described packaging film in that the outer layer of the packaging film section, forming section of the antimicrobial and / or oxygen-scavenging functional layer, or the entire functional layer forming an outer layer of the packaging film section on the outside of the packaging film section, at least in sections, is arranged in a region enclosed by an annular sealing surface area. In this case, under an annular sealing surface, an area circumferential around the area forming the outer layer of the packaging film section or the functional layer forming an outer layer of the packaging film section is circumferential, that is to say in the circumferential direction. To understand endless, sealing surface whose shape is not limited to a specific geometric shape. Thus, under an annular sealing surface in addition to an annular sealing surface and all other geometric shapes, such as rectangular or square, or oval ring shapes to understand.

With respect to the packaging, the object is achieved in that the packaging has at least one formed according to the concept of the invention packaging film.

With regard to the packaging product unit, the object is achieved in that at least one product (packaged goods) is accommodated in a packaging which has at least one packaging film formed according to the concept of the invention.

The invention is based on the idea, in the event that the functional layer of the packaging film section only partially forms an outer layer of the packaging film section, i. only partially in relation to its surface extent to the outer side of the packaging film section, this, an outer layer of the packaging film section forming portion of the functional layer, at least partially, preferably completely, to be arranged in an area on the outer side (outer surface) of the packaging film portion of an annular, ie enclosed around the section surrounding sealing surface. In the event that (based on their areal extent), the entire functional layer extends to the outside of the packaging section, i. in the event that the functional layer completely forms an outer layer of the packaging film section, it is provided in a packaging film formed according to the concept of the invention, to arrange the functional layer, at least partially, preferably completely in a region which is on the outside (outer surface) of the packaging film section of an annular, ie is enclosed around the area surrounding sealing surface.

In other words, it is the essence of the invention to form the outer surface of the packaging film portion only in part by means of the entire functional layer or by means of a portion of the functional layer and to form at least a portion of the outer surface of the packaging film portion with an annular sealing surface arranged in such a way in that it completely surrounds the section of the functional layer or the functional layer, ie encloses it. The sealing surface is preferred formed by a sealable, in particular heat-sealable material which forms in a finished, with the aid of a trained according to the concept of the invention packaging packaging, a sealed seam, which seals the packaged, in particular air and / or moisture-proof. It is within the scope of the invention, as will be explained later, that the packaging film is sealed with itself in the area of the annular sealing surface, for example for producing a bag-shaped packaging, or with another packaging part, in particular another packaging film and thereby the product encloses, wherein the functional layer in this case preferably forms the product (packaged) facing the packaging inside. A packaging film designed according to the concept of the invention places substantially lower demands on the properties of the functional layer, since the functional layer itself does not have to be sealed - the sealing function assumes, preferably exclusively, the sealing surface surrounding the functional layer, ie circumferential sealing surface. The functional layer is preferably a non-sealable or at least only poorly sealable layer.

With regard to the formation of the single-layered or multilayered substrate and the arrangement of the functional layer relative to the substrate, there are various possibilities. For example, it is possible for the substrate to consist only of a single layer, for example an aluminum layer. Alternatively, it is possible to provide as a substrate a multilayered substrate composed of different functional layers. Preferably, the functional layer is printed directly on the single-layer or multi-layer substrate. in case of a multi-layered substrate, an embodiment is preferred in which the immediately adjacent to the functional layer layer is a primer layer, which serves as an adhesion promoter, to ensure better retention of Funktionsweiseschicht. An adhesion improvement can also be achieved by a corresponding pretreatment of the substrate, for example by a plasma treatment. It is within the scope of the invention to apply the primer layer shortly before the printing of the functional layer and thus to make it part of the substrate for heating the functional layer.

In a development of the invention, it is advantageously provided that the outer / outer surface / flat side of the packaging film section has no functional layer in a region outside the annular sealing surface - ie the outer layer of the packaging film section forming the functional layer or the entire functional layer forming an outer layer exclusively in the area enclosed by the annular sealing surface. In the case of a packaging film which consists exclusively of a single packaging film section, it is advantageous if no functional layer is provided on the entire outside / outside surface of the packaging film in an area outside the area enclosed by the sealing surface, since this, in particular non-sealable, functional layer would be located outside the actual product space.

With regard to the relative arrangement between sealing surface and functional layer, there are different possibilities.

For example, it is possible that the sealing surface is formed by a sealing layer of the substrate, which is partially covered by the functional layer. In other words, the functional layer of the packaging film section forming an outer layer of the packaging film section is at least partially, preferably completely, in a centric region of the sealing layer so that the sealing layer, viewed from the outside of the packaging film, is only in an annular, the functional layer of the packaging film section enclosing area is visible. It is possible that the functional layer is printed directly on the sealing layer. Alternatively, it is possible to provide between the functional layer and the sealing layer at least one further, preferably only one further, layer, preferably a primer layer, as adhesion promoter.

In an alternative embodiment, the layer arrangement of the sealing surface and the functional layer is reversed. In this case, the functional layer is printed on the substrate, preferably on a primer layer of the substrate and the sealing layer is above (offset towards the outside) of the functional layer, so this covers annularly and thereby closes an inner, an outer layer of the packaging film section forming section the functional layer. It is also conceivable here for the sealing layer to be applied directly to the functional layer, preferably to be printed. However, an embodiment in which the sealing layer is applied to a suitable primer layer applied to the functional layer for improved adhesion, in particular printed on, is particularly preferred. Likewise, an embodiment can be realized in which both the sealing layer and the functional layer are applied to the substrate, preferably to a corresponding adhesion promoter-primer layer. In this case, for example, with a first pressure roller, the functional layer can be applied in an inner region and, with a second pressure roller, the annular sealing surface around the functional layer. In this case, the functional and the sealing layers do not overlap, at least substantially, if necessary, they run somewhat into one another, but can also have an intermediate, pressure-free gap. The entire functional layer (ie the functional layer over its entire areal extent) thus forms an outer layer of the packaging film section. For applying the sealing layer and the functional layer, it may be advantageous to cure the first applied layer (sealing layer or functional layer) at least partially, for example by heat or irradiation, before applying the subsequently applied layer (functional layer or sealing layer).

With regard to the geometric arrangement of the functional layer or of the portion of the functional layer within the annular sealing surface, there are in turn several possibilities. Thus, it is possible to provide a large-area arrangement of the functional layer or a portion of the functional layer and thus the largest possible contact surface, the functional layer or the portion of the functional layer within the annular sealing surface over the entire surface, preferably such that the entire of the annular sealing surface enclosed area is filled by the functional layer. alternative it is possible to arrange the functional layer only in at least one area within the sealing surface, wherein the functional layer can be applied, for example, as a pattern, preferably as a regular pattern.

It is also possible to implement an embodiment in which the functional layer or the section of the functional layer is formed from a plurality of adjacently arranged layer subsections, wherein at least two layer subsections of the functional layer or the section of the functional layer have a different function. For example, antimicrobial layer sections and oxygen-catching layer sections can be arranged like a checkerboard within the annular sealing surface.

As explained at the outset, the material forming the functional layer (in particular material composition) is, for example, a printable material that can be applied by means of at least one printing process, in particular to the substrate and / or a sealing layer. This can be formed, for example when using digital printing powdered in the manner of a toner for laser printers. However, a liquid embodiment of the material is particularly preferred, so that the material can be applied to the substrate, for example by roller printing, flexographic printing, inkjet printing, gravure printing or else by a suitably designed digital printing method. The functional layer can also be applied, for example, by application, such as doctoring, brushing, brushing, spraying or pouring.

In a further development of the invention is advantageously provided that the substrate is either formed as a barrier layer or has a barrier layer. The barrier layer is preferably a layer which is effective with regard to avoiding oxygen diffusion in order to prevent the penetration of oxygen, such as oxygen from the ambient air, into the packaging or through the substrate into the functional layer. Particularly suitable here is to form the barrier layer of aluminum or an aluminum alloy or to use a barrier layer that is at least aluminum-containing.

Substrates having a barrier layer may be, for example, films comprising at least one layer or film of polyvinyl chloride, of ethylene vinyl alcohol or containing at least one metallic layer or a vacuum deposited layer of silicon oxides or aluminum oxides. With regard to the antimicrobial effect, a barrier layer in the substrate is less critical and can occasionally be omitted.

With regard to the concrete design of the, preferably not or only slightly, sealable functional layer, there are various possibilities. Particularly preferred is an embodiment in which the functional layer as in WO 2006/133754 A1 is formed described. The WO 2006/133754 A1 should be considered as belonging to the disclosure content of the present application in respect of the formation of the functional layer, with the result that at least one arbitrary feature of the present application with at least one arbitrary feature of WO 2006/133754 A1 combinable and claimable. Especially It is preferred if the functional layer is designed such that it releases antimicrobial agents such as benzoic acid, sorbic acid, natamycin, bacteriocins, plant extracts or mixtures thereof. Further active substances are silver, silver ions, quaternary ammonium compounds or quaternary phosphonium compounds. The functional layer can release, for example, antimicrobial agents for the purpose of realizing an antimicrobial effect (release system). It is also possible that the functional layer contains bound or enclosed antimicrobial compounds (contact toxicity). In addition, the functional layer can form a biophobic and / or antiadhesive surface.

Additionally or alternatively, the functional layer, as mentioned above, as oxygen scavenger layer with at least one oxygen-reactive chemical compound (scavenger) may be formed. Particularly preferred is the functional layer, at least in sections, as in WO 2007/051860 A1 described trained. The WO 2007 051860 A1 is to be considered as belonging to the subject matter of the disclosure of the present application in respect of a possible embodiment of the functional layer, with the result that any feature of the present application with at least one arbitrary feature of WO 2007 051860 A1 combinable and claimable.

The functional layer may contain, for example, antioxidants which oxidize the same to trap oxygen. Other substances are oxygen adsorbers, which bind oxygen by physical trapping. Other modes of action are oxygen scavengers that chemically oxidize the oxygen tie. Other options include catalytic reactions where oxygen is at least one of the reactants.

As indicated at the outset, an embodiment of the packaging film can be realized in which it has only a single, previously described packaging film section or is formed by only a single packaging film section described above. This is particularly advantageous if the package has only a single Packgutraum. Alternatively, the packaging film comprises a plurality of previously described packaging film sections, in particular in the transverse direction or in the longitudinal direction of the packaging film, wherein preferably at least two packaging film sections have an annular sealing surface, wherein preferably each annular sealing surface surrounds a portion of the functional layer on the outside of the packaging film. It is possible and desirable for many applications that adjacent sealing surfaces merge into each other or form a common sealing surface, wherein within the common sealing surface then a plurality of spaced-apart functional layer portions of the packaging film are arranged, which are enclosed by the common sealing surface. Preferably, the packaging film is separated from a large-area packaging film, for example by cutting or punching, wherein the large-area packaging film can be stacked for example in sheets or rolled up on a roll.

The invention also leads to a packaging, in particular a food packaging or a pharmaceutical packaging, in particular for a medicament. The packaging is characterized in that it comprises at least one formed according to the concept of the invention packaging film or is formed from such a packaging film. In the simplest case, the package consists of a single packaging film having a single, previously described packaging film portion, the annular sealing surface of which is sealed to itself to form a bag-shaped package.

In a development of the invention, it is advantageously provided that the functional layer forming an outer layer of the packaging film forms the inner side of the packaging, that is to say it faces the packaged packaged goods.

Particularly preferred is an embodiment of the package as a blister pack, wherein the blister pack comprises a bottom film having cavities and a cover film. In this case, it is possible to form the bottom film and / or the cover film as a packaging film designed according to the concept of the invention. In this case, the functional layer or a section of the functional layer of a packaging film section of the packaging film preferably forms a section of the inside of a closed cavity.

The invention also leads to a packaging product unit, which has at least one product (packaged goods) packed in a previously described packaging. The outer functional layer is directed to the packaging against the interior and thus against the contents (Packgut). In this case, an embodiment in which the functional layer of a packaging film section of the packaging film is in direct contact with is particularly preferred the packaged product, in particular in order to develop its antimicrobial effect optimally.

Fig. 1:

eine Verpackungsfolie mit einem einzigen Verpackungsfolienabschnitt, umfassend eine ringförmige Siegelfläche, die einen Bereich umschließt, in dem eine gesamte Funktionsschicht des Verpackungsfolienabschnittes oder ein Abschnitt der Funktionsschicht angeordnet ist,

Fig. 2:

ein alternatives Ausführungsbeispiel einer Verpackungsfolie mit mehreren in Längsrichtung sowie in Querrichtung nebeneinander angeordneten Verpackungsfolienabschnitten,

Fig. 3:

ein weiteres alternatives Ausführungsbeispiel einer Verpackungsfolie mit einer Vielzahl von Verpackungsfolienabschnitten, wobei die Verpackungsfolie als Rolle gerollt ist,

Fig. 4a:

eine geschnittene Darstellung einer möglichen Ausführungsform einer Verpackungsfolie, bei der die Funktionsschicht sich auf einer Siegelschicht befindet und die gesamte Funktionsschicht des Verpackungsabschnittes sich innerhalb einer von der Siegelschicht gebildeten, ringförmigen Siegelfläche angeordnet ist,

Fig. 4b:

eine geschnittene Darstellung einer alternativen Ausführungsform einer Verpackungsfolie, bei der sich die Siegelschicht oberhalb der Funktionsschicht befindet und ein Abschnitt der Funktionsschicht innerhalb einer von der Siegelschicht gebildeten ringförmigen Siegelfläche angeordnet ist,

Fig. 4c:

eine geschnittene Darstellung einer weiteren alternativen Ausführungsform einer Verpackungsfolie, bei der die gesamte Funktionsschicht des Verpackungsfolienabschnittes und die Siegelschicht in einer Ebene nebeneinander angeordnet sind,

Fig. 4d:

eine geschnittene Darstellung einer alternativen Ausführungsform einer Verpackungsfolie, bei der die eine äußere Schicht der Verpackungsfolie bildende Funktionsschicht aus mehreren nebeneinander angeordneten Funktionsschichtteilabschnitten gebildet ist, wobei zwei Arten von Funktionsschichtteilabschnitten vorgesehen sind,

Fig. 4e:

eine geschnittene Darstellung einer weiteren alternativen Ausführungsform einer Verpackungsfolie mit einer auf einer Siegelschicht aufgebrachten Funktionsschicht, wobei die Funktionsschicht nicht vollflächig, sondern nur abschnittsweise aufgedruckt ist und

Fig. 5:

eine geschnittene Darstellung einer als Blisterverpackung ausgebildeten Verpackung mit einer als Deckfolie ausgebildeten Verpackungsfolie.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings. These show in:

Fig. 1:

a packaging film having a single packaging film portion, comprising an annular sealing surface surrounding an area in which an entire functional layer of the packaging film portion or a portion of the functional layer is disposed,

Fig. 2:

an alternative embodiment of a packaging film with a plurality of longitudinally and transversely juxtaposed packaging film sections,

3:

a further alternative embodiment of a packaging film having a plurality of packaging film sections, wherein the packaging film is rolled as a roll,

Fig. 4a:

a sectional view of a possible embodiment of a packaging film, wherein the functional layer is located on a sealing layer and the entire functional layer of the packaging section is disposed within an annular sealing surface formed by the sealing layer,

Fig. 4b:

3 is a sectional view of an alternative embodiment of a packaging film in which the sealing layer is located above the functional layer and a portion of the functional layer is arranged within an annular sealing surface formed by the sealing layer,

4c:

a sectional view of another alternative embodiment of a packaging film, in which the entire functional layer of the packaging film section and the sealing layer are arranged in a plane next to each other,

4d:

a sectional view of an alternative embodiment of a packaging film, wherein the functional layer forming an outer layer of the packaging film is formed of a plurality of juxtaposed functional layer sections, wherein two types of functional layer sections are provided,

4e:

a sectional view of another alternative embodiment of a packaging film with a functional layer applied to a sealing layer, wherein the functional layer is not printed over the entire surface, but only in sections, and

Fig. 5:

a sectional view of a designed as a blister pack with a packaging designed as a cover foil packaging film.

In the figures, the same components and components with the same function with the same reference numerals.

In Fig. 1 a packaging film 1 is shown in a view of an outer side 2 formed by a flat side. The outside lying in the plane of the page 2 of the packaging film 1 may be partially the inside of a producible with the packaging film 1, in Fig. 1 not shown, packaging form. The thickness extension of the packaging film 1, ie the extension into the plane of the drawing, is preferably less than 1 mm.

In the Fig. 1 shown packaging film 1 is formed by a single packaging film section. 3

The outer side 2 of the packaging film section 3 is partially formed by a rectangular contoured annular sealing surface 4 of a sealable material, such as a sealing wax, a heat-sealable lacquer, a sealing layer or a sealing film, sealable materials such as polyolefins, z. As polyethylene, polypropylene, or their copolymers or polyacrylic or Polymetacrylpolymere or copolymers, etc.

In a region within the rectangular-ring-shaped sealing surface 4, a functional layer 5 printed on a substrate not shown, forming an outer layer of the packaging film section 3, is located in a full-surface application. This functional layer 5 has antimicrobial and / or oxygen-scavenging, ie oxygen-binding, properties. The functional layer 5 is finished Packaging the innermost, the packaging inner volume limiting layer and depending on the design and arrangement of the packaged goods either in direct contact with the packaged goods or in direct contact with the atmosphere surrounding the packaged goods. The functional layer 5 is a non-sealable layer which completely fills the entire area 6, which in this embodiment is rectangular, within the annular sealing surface 4.

A packaging produced with the aid of the packaging film 1 is closed by sealing the annular sealing surface 4, in particular by heat sealing, with a mating surface of another packaging part, in particular another packaging film. In a simplest embodiment, it is conceivable, for example, to fold the packaging film 1 in half such that one half of the annular sealing surface 4 comes to rest on the other half, whereupon the sealing surface portions are sealed together.

In Fig. 2 an alternative packaging film 1 is shown, which has a total of nine packaging film sections 3, wherein the packaging film sections 3 are arranged evenly distributed in the longitudinal direction L and in the transverse direction Q of the packaging film 1 side by side. The packaging film 1 according to Fig. 1 can, for example, by separating a packaging film section 3 from a packaging film 1 according to Fig. 2 be formed. It can be seen that each packaging film section 3 on an outer side 2 comprises an annular sealing surface 4, wherein each annular sealing surface 4 encloses a region 6, within which a functional layer 5 of the respective Packing section 3 or only a portion of this functional layer 5 is arranged, wherein the functional layer 5 has oxygen-absorbing properties and / or antimicrobial properties.

How to get out Fig. 2 yields, adjacent annular sealing surfaces 4 into each other or have common surface sections. Overall, the annular sealing surfaces 4 form a matrix structure, in which regions 6 are enclosed, or encloses the regions 6, which in the illustrated embodiment are each completely, alternatively only partially occupied by a functional layer 5 or a portion of the functional layer of the respective packaging film section , An in Fig. 2 For example, the packaging film 1 shown serves as a cover film for closing a bottom film of a blister pack, in which case the regions 6 close with the functional layers 5 or the sections of the functional layer 5 in the bottom film molded cavities. The annular sealing surfaces 4 or the formed sealing matrix of sealable material serve or serve for moisture and air tight bonding of the packaging film 1 to the bottom film of the blister package.

It is also conceivable that the packaging film 1 according to Fig. 2 depicts a packaging film sheet from which packaging film units and in each case at least one packaging film section 3, preferably with a respective plurality of packaging film sections 3, are separable, in particular can be cut out or punched out.

In Fig. 3 a packaging film 1 is shown, which is partially unwound from a roll 7. The packaging film 1 according to Fig. 3 serves as a basis for the production of packaging film units, such as in Fig. 1 or Fig. 2 are shown. The packaging film 1 according to Fig. 3 is analogous to Fig. 2 and has a multiplicity of packaging film sections 3 arranged side by side in the longitudinal direction L (unwinding direction) and in the transverse direction Q, each packaging film section 3 having an annular sealing surface 4 which in each case encloses a region 6 with functional layer 5.

The following are in the Fig. 4a to 4e different embodiments of cut, rotated in comparison to the preceding figures by 90 ° packaging films 1, wherein in the Fig. 1 to 3 illustrated packaging films 1 analogous to the embodiments according to the Fig. 4a to 4e can be executed. For reasons of clarity, the packaging films 1 shown in each case comprise only a single packaging film section 3, it being understood that a large number of such packaging film sections can be arranged next to one another.

The packaging film 1 according to Fig. 4a comprises a substrate 8, which is formed in the illustrated embodiment of a barrier layer 9 made of aluminum, on the entire surface of a sealing layer 10 is applied from a sealable material. If necessary, 10 more layers can be provided between the barrier layer 9 and the sealing layer. On the sealing layer 10 is located in a central region of a packaging film section 3, a functional layer 5 of the packaging film section with antimicrobial properties or oxygen-absorbing properties, wherein the functional layer 5, for example printed directly on the sealing layer 10. Alternatively, between the sealing layer 10 and the functional layer 5, at least one further layer, preferably only one further layer, preferably a primer layer, is provided for adhesion improvement, wherein it is particularly preferred if the surface extension of this primer layer, at least approximately, the surface extension the functional layer 5 corresponds. The outer side 2 of the packaging film 1 or of the packaging film section 3 is formed by an annular sealing surface 4 and the functional layer 5 enclosed on the outer side 2 of the packaging film section 3 by the sealing surface 4. The annular sealing surface 4 is formed by the layer not covered by the functional layer 5 Part of the sealing layer 10.

In Fig. 4 an alternative embodiment of a packaging film 1 is shown. Evident is the single- or multi-layered substrate 8, on which immediately the entire surface of the functional layer 5 is printed, which forms in sections an outer layer of the packaging film section. In this case, one of the functional layer 5 facing side of the substrate 8, for example, be formed by a primer layer with adhesion improvement properties. The functional layer 5 is covered in a peripheral portion of the packaging film section 3 by a sealing layer 10, which is applied in the form of rings, and which forms on its outside the annular sealing layer 4, which encloses an inner region 6, which in the illustrated embodiment of a full surface , an outer layer of the packaging film section 3 forming portion 18 of the functional layer 5 is formed. So if you look at the outside 2 of the packaging film 1, results itself, as in the embodiment according to Fig. 4a , this in Fig. 1 shown picture. The edge portion of the functional layer 5 covered by the sealing surface 4 does not form an outer but an inner layer of the packaging film section 3.

In the embodiment according to Fig. 4c are the entire functional layer 5 and the annular sealing layer 10, at least in sections, in a common plane. Both the functional layer 5 and the sealing layer 10 are printed on the substrate 8. Optionally, below the sealing layer 10 and the functional layer 5 may be different or a common functional layer, in particular a primer layer. Preferably, the functional layer 5 of the packaging film section 3 and the sealing layer 10 of the packaging film section 3 are applied one after the other, wherein, in particular in the digital printing process, both layers 5, 10 are applied together. As it turned out Fig. 4c results, the annular sealing surface 4, which is formed by the sealing layer 10, the area 6, which is filled over the entire surface of the entire, an outer layer of the packaging film section forming functional layer 5. The entire sealing layer 10 also forms an outer layer of the packaging film section 3.

The embodiment according to Fig. 4d essentially corresponds to the embodiment according to Fig. 4a , In this case, the substrate 8 comprises a sealing layer 10, which is covered in a central region by a functional layer 5 of the packaging film section 3. In a region outside the functional layer 5 forming an outer layer the sealing layer 10 forms an annular sealing surface 4, which encloses the functional layer 5 and is part of an outer layer of the packaging film section 3. The functional layer 5, in turn, is formed by functional layer subsections 11, 12 arranged side by side, wherein, for example, the functional layer subsections 11 have an antimicrobial function and the functional layer subsections 12 have an oxygen scavenging function. The formation of the functional layer 5, as in Fig. 4d shown and described above, can also in the embodiments according to the Fig. 4b and 4c will be realized.

In the embodiment according to Fig. 4e Among other things, the substrate 8 comprises a sealing layer 10, which forms an annular sealing surface 4 in an outer region, which surrounds the region 6. In area 6, a functional layer 5 is provided which is not applied over the entire surface of the sealing layer 10, but as a pattern consisting of a plurality of spaced functional layer subsections 11. The in Fig. 4e illustrated embodiment of the functional layer 5 can with any packaging film variants 1 according to the Fig. 4a to 4c be combined.

In Fig. 5 a package 13 designed as a blister pack is shown. This packaging 13 is formed from a bottom foil 14, which may be formed in one or more layers. Preferably, the bottom foil 14 comprises at least one aluminum-containing layer or is formed as an aluminum-containing layer. On the bottom sheet 14, a cover sheet 15 is sealed, wherein the cover sheet 15 is designed as a packaging film 1, which may be carried out as described above. The packaging film 1 comprises in the shown Embodiment, a multi-layer substrate 8, which in addition to an outer barrier layer 9 has a full surface applied to the barrier layer 9 sealing layer 10. The sealing layer 10 is covered in sections by functional layers 5, which are part of packaging film sections 3. In the regions outside the functional layers 5, the sealing layer 10 forms annular sealing surfaces 4, which, like the functional layer 5, face the bottom foil 14. The cover film 15 or the packaging film 1 is arranged in such a way that the functional layers 5 directly delimit the cavities 16 introduced into the bottom film 14 so that the functional layers 5 can have direct contact with a product (packaged product) not shown in the cavities 16 , The sealing surfaces 4 are located directly on conforming mating surfaces 17 of the bottom foil 14, which limit the cavities 16 edge. With these mating surfaces 17, the sealing surfaces 4, preferably sealed by heat sealing.

Claims (18)

1. Packaging film, in particular for the production of a packaging (13), with at least one packaging film section (3) comprising a single- or multilayer substrate (8), a printed functional layer (5) formed of a printable material and forming at least in sections an outer layer of the packaging film section (3), which is configured in such a way that it has antimicrobial and/or oxygen-scavenging properties, characterised in that the section (18) of the functional layer (5) forming an outer layer of the packaging film section (3) or the functional layer (5) forming the entire outer layer of the packaging film section on an outside (2) of the packaging film section (3) is arranged at least in sections in an area (6) surrounded by an annular sealing surface (4).
2. Packaging film according to claim 1, characterised in that the section (18) of the functional layer (5) forming an outer layer of the packaging film section (3) or the functional layer (5) forming the entire outer layer of the packaging film section (3) on the outside (2) of the packaging film section (3) is arranged exclusively in an area (6) surrounded by the annular sealing surface (4).
3. Packaging film according to one of claims 1 or 2, characterised in that the sealing surface (4) is covered by a sealing layer (10) of the substrate (8) which is covered at least in sections by the functional layer (5).
4. Packaging film according to one of claims 1 or 2, characterised in that the sealing surface (4) is formed by a sealing layer (10) covering the functional layer (5) in sections.
5. Packaging film according to one of claims 1 or 2, characterised in that the sealing surface (4) is formed by a sealing layer (10) of the substrate (8) or a sealing layer (10) applied on the substrate (8), wherein the sealing layer (10) does not overlap the functional layer (5) and the functional layer (5) does not overlap the sealing layer (10).
6. Packaging film according to any of the preceding claims, characterised in that the functional layer (5) is applied inside the area (6) surrounded by the annular sealing surface (4) over the full surface or in sections, preferably as a pattern, in particular regular.
7. Packaging film according to any of the preceding claims, characterised in that the functional layer (5) is formed of different part layer sections (11, 12) arranged next to each other, with preferably at least partly different function.
8. Packaging film according to any of the preceding claims, characterised in that the functional layer (5) is printed by digital printing, flexography, rotogravure or ink jet printing.
9. Packaging film according to any of the preceding claims, characterised in that the substrate (8) is formed as a barrier layer (9), in particular for oxygen, or comprises such a barrier layer (9), in particular containing aluminium.
10. Packaging film according to any of the preceding claims, characterised in that the functional layer (5) has antimicrobial properties in that it is formed to release antimicrobially active substances.
11. Packaging film according to any of the preceding claims, characterised in that the functional layer (5) comprises at least one scavenger component which is reactive against oxygen, preferably only after suitable triggering, preferably with at least one organic residue.
12. Packaging film according to any of the preceding claims, characterised in that the packaging film (1) comprises exclusively one packaging film section (3) or several packaging film sections (3) which are arranged next to each other in particular in the transverse direction and/or longitudinal direction of the packaging film (1).
13. Packaging, in particular foodstuff packaging or pharmaceutical packaging (13), comprising at least one packaging film (1) according to any of the preceding claims.
14. Packaging according to claim 13, characterised in that the area (6) which is surrounded by the annular sealing surface (4), and with the section of the functional layer (5) forming an outer layer of the packaging film section (3) or with the functional layer forming an outer layer of the packaging film section (3), forms a packaging interior.
15. Packaging according to one of claims 13 or 14, characterised in that the packaging (13) is formed as a blister pack with a base film (14) having at least one cavity (16) and with a cover film (15) which is sealed to the base film (14) closing the cavity (16), and in that the base film (14) is formed by the packaging film (1).
16. Packaging according to any of claims 13 to 15, characterised in that the packaging (13) is formed as a blister pack with a base film (14) having at least one cavity (16) and with a cover film (15) sealed to the base film (14) closing the cavity (16), and in that the cover film (15) is formed from the packaging film (1).
17. Packaging-product unit comprising at least one product packed in a packaging (13) according to any of claims 13 to 16, in particular a foodstuff or a pharmaceutical product.
18. Packaging-product unit according to claim 17, characterised in that the functional layer (5) forming an outer layer of the packaging film section (3) or the section of the functional layer (5) forming an outer layer of the packaging film section (3) has direct contact with the product.

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