EP2599735B1 - Closure film with integrated opening - Google Patents

Description

The invention relates to a closure film having the features of the preamble of claim 1 for closing a packaging bundle at its packaging edge, comprising at least one weakening line defining the periphery of a removal section, through which removal section a package contents can be removed in the opened state, wherein the closure film comprises a single layer group. Furthermore, the invention relates to a packaging comprising a packaging container as well as a sealing film for closing the packaging package at its packaging edge.

Different designs of foils for closing easy-to-open packages are known from the prior art.

From the document DE 20 2011 004 614 U1 For example, a film lid with a multi-layer film for closing a container is known. For this purpose, the foil lid has a first and a second layer group of composite layers as well as a covering material called a carrier material. Both the first and the second layer group each comprise at least one layer of a packaging film with peelable, ie peelable properties and at least one further layer of a packaging film with festsiegelnden properties with respect to the container material used.

The film layer with festsiegelnden properties of the first layer group is attached directly to the container and facing the container contents. The first layer group has a weakening zone defining the periphery of an opening which is spaced from the edge of the container within the multi-layer film. The second layer group arranged above the first layer group is pulled off the first layer group when an opening tab is raised. The material of the first layer group located within the opening or weakening zone is torn at the opening edge and adheres to the second layer group. In this case, the opening in the first layer group is released and the container contents can be removed or emptied.

A disadvantage of this design is the extremely complex structure of the multilayer film. For their production, individual layers of different film materials, each with different properties in exactly predetermined order to several separate layer groups must be connected together.

Further, from the document WO 01/74685 A1 a lid member for sealing containers, which consists of a uniform structure in their metal foil or plastic film with lines of weakness in the form of indentations or perforations. The indentations or perforations of the weakening lines are produced by stamping. However, the mechanical punching or embossing tools required for punching must each be made individually, which is why such a production process is particularly time-consuming and cost-intensive. Furthermore, a conventional mechanical manufacturing process lacks flexibility for new packaging tasks with changed lines of weakening lines on the closure film since lines of weakness can only be made with the contours of the existing mechanical tools.

Further, from the document WO 94/19256 A1 a sealing film for closing a packaging content is known, which has a releasable with a grip tab removal portion. The closure portfolio is formed here by a layer group formed from two film layers. The known closure film has the disadvantage that it does not assist the user if the packaging content is formed by a liquid fraction and a solids-containing fraction and in a first step, only the liquid fraction is to be emptied from the packaging container.

A generic Verschunßfolie is from the WO 2005/009868 A1 known. The invention has for its object to overcome the disadvantages of the prior art and to provide a sealing film with an integrated opening, which can be produced inexpensively and therefore is particularly versatile for a variety of applications.

This object is achieved in a closure film according to the preamble of claim 1 with the features of the characterizing part of claim 1. The subclaims relate to further particularly advantageous embodiments of the invention.

In a closure film according to the invention for closing a packaging bundle at its packaging edge, wherein the closure film is peelably attached to the packaging edge, wherein at least two removal sections are openably opened with only one grip tab and in the open state in each case a befindlicher between adjacent parts removal sections Connecting film portion remains connected to the edge of the packaging to remove a first liquid fraction of the To enable packaging contents without emptying another, containing solids fraction of the packaging content with.

By providing only one gripping tab for opening at least two part-removal sections separated by the connecting-film section, a screen is created with which the liquid fraction of the contents of the contents can be emptied while the solids remain in the packing-container. Due to the only one grip tab for opening the at least two parts removal sections a particularly practical and easy handling of the packaging package is possible.

A closure film according to the invention with a weakening line which defines an integrated removal section offers numerous advantages. The lines of weakness on the closure film can be produced simply, inexpensively and with particular precision by means of a laser beam. Due to its construction with a single layer group, the sealing film according to the invention can be used in a particularly versatile manner for a wide variety of packaging tasks. The size of the removal section required for portion-wise removal of the contents of the packaging can be adapted particularly easily to the respective packaging containers. Thus it is possible, for example, To close food as powdered or free-flowing solids, as well as liquids, sauces or dressings in corresponding packaging containers each with a sealing film according to the invention. Due to the precisely produced with a laser beam line of weakness in the closure film, a removal section can be easily and easily open with little effort, which represents a further advantage of the invention. Unintentional spillage or at least partial loss of the contents of the packaging during the opening of the closure film is thus reliably avoided.

Advantageously, in the case of a closure film according to the invention, the at least one weakening line at least partially weakens the closure film, wherein the line of weakness can be produced on one side and / or on both sides with the aid of a laser beam on the closure film. Depending on the packaging task, different embodiments of weakening lines are encompassed by the invention. The weakening lines can be, for example, punctured, dashed or arranged as continuous lines or line sections on the periphery of a removal section or a ventilation section.

By means of a laser beam, material removal in the region of the weakening line of the sealing film can be carried out with high precision, for example, by means of short, high-energy laser pulses. The material can be removed on one or both opposite sides of the sealing film. Due to the different degrees of absorption of different materials of the individual film layers, it is possible by means of a laser beam to selectively remove material only on individual film layers, while, for example, at least one film layer of the multilayer composite film remains intact.

In a preferred embodiment of the invention, in the case of a closure film, the line of weakness can be produced on one side and / or on both sides with the aid of a laser beam on at least one inner film layer of the closure film. Thus, for example, in a multilayer closure film, which is made of different plastics, and inner film layers, which are for example made of polyester, selectively ablate by means of the laser beam, without causing external film layers, which are made for example of polyethylene, attacked by the laser or be weakened.

A targeted weakening of individual inner film layers in one multilayer film composite can not be accomplished with conventional stamping or embossing tools.

In the case of a multilayer composite film comprising at least three film layers, it is thus possible within the scope of the invention to weaken the two outer film layers by targeted removal of material by means of the laser beam, while at least one inner film layer without a weakening line remains intact. Likewise, it is conversely possible to weaken an inner layer of film with different absorption levels to the two outer layers of film by means of a laser beam, while the two outer layers of film remain substantially intact.

In a particularly expedient embodiment of the invention, the layer group of the closure film is formed by a single film layer. In this embodiment, a so-called monofilm is used as a single film layer as a sealing film.

In a further particularly expedient embodiment of the invention, at least two film layers of the layer group of a sealing film are inseparably connected to one another. An inseparable connection of the plurality of film layers is achieved, in particular, by laminating, ie by bonding the individual film layers by means of adhesive, heat and / or pressure. A multilayer composite film produced in this way offers the advantage, as a sealing film, that individual film layers made of different materials, each with different properties, are combined to form a layer group. Thus, for example, individual film layers that are particularly suitable for food can be combined with further film layers, which are for example gas-tight or particularly tear-resistant or form a water vapor barrier, to form a multilayer composite film with properties preferred for the respective packaging task.

In a closure film according to the invention, it is particularly expedient to provide at least one further weakening line defining the periphery of a ventilation section, through which ventilation section in the opened state the package contents can be ventilated. In this expedient embodiment of the invention, the removal is facilitated in particular by a liquid packaging content from the removal section and prevents inadvertent spillage when emptying the package by a venting section. Most of the ventilation section is smaller than a removal section.

It is also conceivable that the weakening lines relate only to a portion of the periphery of a removal section or a ventilation section. Thus, the remains Closing film of the removal section or ventilation section at least partially connected unattenuated with the surrounding sealing film.

A closure film according to the invention expediently has a reduced film layer thickness of 10% to 90%, in particular of 20% to 80%, preferably of 30% to 70%, of the total film layer thickness at the weakening line. In this embodiment variant, the film layer thickness at the weakening line is correspondingly reduced depending on the packaging task, which can be done extremely reliably and precisely by means of the laser beam used. Thus, a removal section and / or ventilation section is provided in each case, which ensures a sealed sealing film in the unopened state and is particularly easy to open.

If a multilayer composite film, that is to say a closure film with a layer group having at least two interconnected film layers, is used as the closure film, then in each case entire film layers are preferably weakened by material removal. In the case of a multilayer composite film which is produced, for example, from a first film layer made of a thermoplastic material, in particular polyethylene terephthalate (PET), and further film layers made of aluminum and polyethylene (PE for short), the PET film layer is preferably in the region of the weakening line completely severed. The remaining composite of the other film layers of aluminum and PE, however, remains complete, so obtained without weakening.

In one development of the invention, in a closure film, at least one removal section and / or ventilation section can each be mechanically pressed in, wherein the line of weakness at the periphery of the at least one removal section and / or ventilation section is interrupted in each case by a connection foil section. In this embodiment of the invention, the weakening line is interrupted at the periphery of a removal section and / or ventilation section. Along this connecting foil portion, the portion of the sealing foil within the weakening line is connected to the sealing foil without weakening line surrounding the withdrawal portion and / or ventilation portion. In the case of mechanical action on the sealing film in the removal section and / or in the ventilation section, for example by the user pressing in the film with a finger or with a pointed tool, the closure film is only torn along the line of weakness and remains undamaged along the connecting film section. The case pressed or torn closure film tab remains advantageous connected to the connecting film portion with the remaining sealing film. Advantageously The pressed-in closure film tab thus does not erroneously get into the package contents, be inadvertently lost or swallowed, for example, in a consumption of the packaging contents.

The closure film is expediently detachably fastened to the edge of the packaging, wherein at least one removal section and / or ventilation section is obviously connected to a gripping tab of the closure film. With a grip tab, which is provided on the closure film and which is connected to a removal section and / or venting section, the closure film sections to be opened can be opened particularly comfortably. Typically, such grip tabs protrude beyond the packaging edge of the packaging package to the outside. Thus, provided with grip bottles removal sections or ventilation sections are particularly easy to open by hand. Advantageously, a separate tool for opening is not required.

According to the invention, in the case of a closure film, the at least one removal section and / or ventilation section is in each case adjacent to the edge of the packaging or arranged across the packaging edge. Such a removal section and / or ventilation section has the advantage that, due to its position on the edge of the packaging, the removal, in particular the emptying of the contents of the packaging, can be accomplished simply and without undesired spilling. During the emptying of the packaging, the edge of the packaging serves as a tear-off edge for the packaging contents. Thus, a particularly clean, portion removal of the contents of the package is possible.

According to the invention, in the case of a closure film, at least one removal section can be opened in divided fashion, wherein at least two removal sections are openably connected to a grip tab and in the opened state a connecting foil section located between adjacent removal sections remains connected to the packaging edge. Such partial removal sections form, for example, a pouring opening for a first, liquid portion of the contents of the package. Solids which form a further portion of the packaging contents are advantageously retained by the connecting foil sections provided between adjacent part-extracting sections and comparable to a sieve. Thus, a fractional removal of the contents of the package is possible, wherein a stored in a liquid, solid packaging content is retained during pouring, without unintentionally falling out of the package.

Suitably, in the case of a closure film, a web width of a connecting film section is from half to three times, preferably from the single to double, the width of a part removal section. With these division ratios of the opening widths of the part removal sections to the web widths of the respectively intermediate connecting film sections, a sealing film can each be individually adapted to the nature of the packaging content.

Advantageously, in the case of a closure film according to the invention, a further removal section is provided around the removal section having at least one removal section, which section can be opened separately from the removal sections after partial removal of the contents of the package. In this embodiment, after the partial removal of, for example, a liquid portion of the packaging contents by the part removal sections, a further portion of the contents of the package can be removed particularly comfortably by the separate, further removal section of the packaging. For example, Mozarella pieces in salt lakes would be suitable for filling a package sealed with such a closure film. By opening a plurality of partial removal sections, the salt coatings can first be poured out of the packaging. Subsequently, to remove the remaining Mozarella pieces, the further removal section surrounding the part removal section is opened. With such a package, the contents of the package can advantageously be removed fractionally and without contact.

In a particularly expedient embodiment of the invention, at least one removal section and / or ventilation section of a closure film can be covered by a grip tab section. In order to avoid unintentional opening or indentation of these weakened zones in the closure film during the transport or storage of such packages, the handle tab portion is folded over the removal section and / or vent section and attached to the Outside of the sealing film removably attached. Thus, such a folded handle tab portion serves as protection against unintentional impressions of a removal section or ventilation section.

For the production of a sealing film according to the invention, at least one material or material mixture is expediently selected from the group: polyethylene, polypropylene, polyester, polyamide, aluminum, paper, polyvinyl chloride.

In addition to the plastics mentioned polyethylene (PE), polypropylene (PP), polyester (PET), polyamide (PA), polyvinyl chloride (PVC), paper and metal foils, for example, aluminum (Alu) can serve for the production of a sealing film. Furthermore, polypropylene or polyamide film layers which are stretched in the longitudinal or transverse direction or in both directions (biaxially) can be used. Such so-called oriented polyester (OPET) films, oriented polypropylene (OPP) films or oriented polyamide (OPA) films can also be used in each case as the film layer of a sealing film and offer the advantage that the thickness and the weight per square meter of such Define slides. Likewise, stretching the film improves mechanical properties, increases transparency, improves cold resistance, and reduces gas permeability.

Particularly advantageous in a package comprising a packaging container and a closure film, which is sealingly fastened for sealing the packaging bundle at its edge of the packaging, in particular by heat sealing, gluing or pressing, a closure film according to the invention is provided. As a packaging container serve, for example, dimensionally stable, cup-shaped container made of plastic, paper or metal, which can be filled with the contents of the package, for example, with food, drinks or food.

In a particularly compact embodiment of a package according to the invention comprising a packaging container with a plurality of receiving chambers, at least two receiving chambers each have at least one removal section and / or ventilation section in the closure film. A packaging container with a plurality of receiving chambers serves for the common packaging of spatially separated packaging contents. The closure film is arranged so that it covers the packaging container at its entire packaging edge. At least at two receiving chambers removal sections or ventilation sections are provided in the closure film in order to remove the individual contents of the package separately from each other from the packaging can.

The invention likewise encompasses a packaging which has at least one removal section and / or ventilation section in the closure film in the region of each individual receiving chamber.

• die Abbildungen Fig. 1 bis 8A jeweils in einer Draufsicht unterschiedliche Varianten von mit peelfähigen Verschlussfolien verschlossenen Verpackungen;
• die Abbildungen Fig. 8B und 8C jeweils in isometrischen Ansichten von schräg oben die einzelnen Schritte während des Öffnens der in Fig. 8A dargestellten Verpackung;
• die Abbildungen Fig. 9 bis 12 jeweils in einer Draufsicht unterschiedliche Ausführungsvarianten von mit festsiegelnden oder peelfähigen Verschlussfolien verschlossenen erfindungsgemäßen Verpackungen;
• die Abbildungen Fig. 13A bis Fig. 13C jeweils in einer Schnittansicht von der Seite Varianten von erfindungsgemäßen Verschlussfolien, welche Schwächungslinien aufweisen;
• die Abbildungen Fig. 14A bis 14C jeweils in isometrischen Schrägansichten eine Variante einer erfindungsgemäßen Verpackung beim Öffnen der Verschlussfolie;
• die Abbildungen Fig. 15A bis Fig. 15C unterschiedliche Ausführungen von erfindungsgemäßen Verpackungen, welche jeweils geteilt zu öffnende Entnahmeabschnitte aufweisen.

Further advantageous embodiments of the invention are described below with reference to the each schematic figures explained in more detail. Show it:

• the pictures Fig. 1 to 8A each in a plan view different variants of closed with peelable sealing films packaging;
• the pictures Figs. 8B and 8C each in isometric views from diagonally above the individual steps during the opening of the in Fig. 8A illustrated packaging;
• the pictures Fig. 9 to 12 each in a plan view different embodiments of sealed with festsiegelnden or peelable sealing films of the invention packaging;
• the pictures FIGS. 13A to 13C in each case in a sectional view from the side variants of sealing films according to the invention, which have weakening lines;
• the pictures Figs. 14A to 14C in each case in isometric oblique views, a variant of a packaging according to the invention when opening the closure film;
• the pictures FIGS. 15A to 15C different embodiments of packaging according to the invention, which each have divided to be opened removal sections.

Fig. 1 illustrates a package 1, which has a packaging container 2 with a substantially circular packaging edge 3. A packaging content 4 is packaged in a receiving chamber 6 of the packaging package 2 under a closure film 10 sealed. The closure film 10 here comprises a layer group 100 of a plurality of film layers inseparably connected to one another and has a weakening line 11, which forms a periphery of a removal section 14. The removal section 14 is arranged in an overlapping manner over the packaging edge 3 of the packaging package 2 and is openably connected to a first grip tab 16 of the closure film 10. A second gripping tab 16 is here arranged, for example, on the side of the closure film 10 opposite the first gripping tab 16 and connected thereto without perforation or without weakening line. The second grip tab 16 is used to remove the entire closure film 10, which forms a Foliendeckel, after the at least partial emptying of the packaging package 2. The two handle tabs 16 each protrude in a known manner beyond the packaging edge 3. As a sealing film 10, for example, a peelable, peelable sealing film 10 is used, which is attached to the packaging edge 3 peelable. By lifting the first grip tab 16 of the removal section 14, the closure film 10 is removed from the packaging edge 3 within the removal section 14. By further tightening the grip tab 16, the sealing film 10 tears along the weakening line 11 of FIG Removal section 14 on, until this film section is finally completely separated from the closure film 10 and the removal section 14 is available as an opening in the closure film 10 for removal of the packaging contents 4.

It is also conceivable within the scope of the invention, a package similar to that in Fig. 1 illustrated packaging 1, which has only one grip tab 16 for opening the removal portion 14. This version is not explicitly shown in the figures.

Fig. 2 shows a packaging 1 comparable to that in Fig. 1 shown figure, wherein the packaging container 2 has two spatially separate receiving chambers 6 and 7 for receiving a first packaging content 4 and a separately stored packaging content 5. A removal section 14 is here arranged in an overlapping manner in the middle of the packaging container 2 located packaging edge 3, so that the two packaging contents 4 and 5 can be removed from the separate receiving chambers 6 and 7 in each case together.

Fig. 3 1 illustrates a further variant of a packaging 1 with a removal section 14 and a ventilation section 15, which, like the removal section 14, is connected to a grip tab 16 of the closure film 10. The ventilation section 15 is arranged on the side diametrically opposite the removal section 14 of the closure film 10 and also has a line of weakness 11 forming the periphery of the ventilation section 15. The venting section 15 and the removal section 14 are here placed overlapping each other over the packaging edge 3. For emptying the packaging content 4, for example a liquid, the gripping tab 16 of the ventilation section 15 is first actuated by manual lifting and the closure film 10 is drawn off the packaging edge 3 within the ventilation section 15. The closure film 10 ruptures on further tightening on the grip tab 16 along the line of weakness 11, wherein the venting section 15 is opened. Subsequently, the removal section 14 is opened by lifting the grip tab 16 of the removal section 14 and by removing the closure film 10 from the packaging edge 3. By further tightening the grip tab 16, the closure film 10 continues to tear along the weakening line of the removal section 14 until it is finally completely separated from the closure film 10 and is separated from the packaging 1. By appropriately inclining the packaging container 2, the liquid contents of the package can now be emptied through the removal section 14. Due to the Ventilation section 15 is an undesirable negative pressure during emptying in the container interior and thus accidental spillage of the packaging contents 4 reliably avoided.

Fig. 4 shows an embodiment of a package 1 with four spatially separated receiving chambers 6, 7, 8 and 9. In the receiving chambers 6 and 9 are each portions of a first packaging content 4. In the receiving chambers 7 and 8 are each spatially separated portions of a second packaging content 5 stored. The receiving chambers 6, 7, 8 and 9 each form quadrants of the packaging package 2 in the form of quadrant segments. The closure film 10 has, in the region of each receiving chamber 6, 7, 8 and 9, a removal section 14, which is in each case openably connected to a gripping tab 16 of the closure film 10. Advantageously, the receiving chambers 6, 7, 8 and 9 thus each be opened separately from each other.

The pictures Fig. 5 to Fig. 8C each show packaging 1, each with a split-opening removal portion 14, wherein two parts removal sections 17 are openably connected to a gripping tab 16 and in the open state in each case between the two adjacent parts removal sections 17 befindlicher connecting film section 19 remains connected to the packaging edge 3. The opened part removal portions 17 act with the middle in between remaining web-shaped connecting film portions 19 as a sieve. For example, a first, liquid fraction of the packaging contents 4 can be removed through the opened part removal sections 17, without emptying a further fraction of the contents of the packaging 4 containing, for example, solids.

Fig. 5 shows a packaging 1 with a receiving chamber 6 for storing a packaging content 4. The receiving chamber 6 has a removal portion 14 comprising two part removal portions 17. In this case, a width 18 of the part removal section 17 corresponds essentially to a web width 20 of the connecting film section 19 lying therebetween.

According to the invention, the web width 20 of a connecting film section 19 can be from half to three times, preferably from the single to double, the width 18 of a part removal section 17. Furthermore, more than two part removal sections 17 may be provided in the closure film 10, wherein in the opened state between two adjacent part removal sections 17 each one Connecting foil portion 19 remains. These variants are not shown explicitly in the figures.

Fig. 6 shows a packaging 1 comparable to that in Fig. 5 shown embodiment, in which case a ventilation section 15 is additionally provided in the closure film 10.

Fig. 7 shows a package 1 with two separate receiving chambers 6 and 7, which are each provided with a removal portion 14 comprising Teilentnahmeabschnitte 17.

Fig. 8A 1 illustrates a packaging 1 with a peelable sealing film 10, wherein a first removal section 14 has two partial removal sections 17, which are arranged on the closure film 10 in an overlapping manner over the packaging edge 3. The two parts removal sections 17 are connected to one another with a grip tab 16 and can be opened together with this. Here, an additional further removal section 14 is provided which, after the partial removal of a first part of the packaging contents 4, can be opened separately from the parts removal sections 17. This further, larger removal section 14 also has a grip tab 16, which is connected to the closure film 10. In the opened state, when the further removal section 14 releases more than half of the total film surface of the packaging package 2, a larger piece of the still remaining packaging content 4 can thus be removed from the packaging 1 in a particularly comfortable manner.

Fig. 8B shows the in Fig. 8A illustrated, closed package 1 in an oblique view in already partially open state. The first removal section 14 is shown removed from the closure film 10. The two part removal sections 17 of the first removal section are thus opened and thus serve, for example, for emptying a liquid component of the packaging contents 4, for example a brine of a mozzarella packaging. Advantageously, in the middle of the removed first removal section 14, a connecting film section 19 of the closure film 10 remains fixedly connected to the packaging edge 3. This prevents inadvertently emptying larger, solid constituents of the packaging contents 4, such as pieces of mozzarella cheese, with the liquid.

Fig. 8C concerns a continuation of the in Fig. 8B Here, the further removal section 14 of the closure film 10, which releases more than half of the entire film surface, is already shown removed from the packaging 1. By way of example, as part of the contents of the package 4, the pieces of cheese can now be taken out of the package 1 in a particularly simple and convenient manner.

Advantageously eliminates here due to the previously cast off brine otherwise usually required for the removal of cheese pieces hand contact with the brine. By weakening lines 11 a particularly simple and clean opening of the removal sections 14 is possible.

Fig. 9 shows a cup-shaped package 1, which is closed at its packaging edge 3 with a peelable sealing foil 10. A removal section 14 has a weakening line 11 in a portion of its periphery, leaving a connecting foil section 19 which has no line of weakness 11. The removal section 14 is arranged in the closure film 10 at a distance from the packaging edge 3. In the case of mechanical action, for example when the closure film 10 is pressed inside the removal section 14 near the weakening line 11 with a finger or with a tool, the closure film 10 yields to the pressure load and tears in the region of the weakening line 11. Advantageously, the resulting film flap of the removal section 14 on the connecting film section 19 remains connected to the closure film 10 and thus can not erroneously reach the receiving chamber 6 or the packaging contents 4. The closure film 10 here comprises a layer group 100 which consists of a single film layer. After opening the removal section 14, it is further possible to completely remove the remaining sealing film 10 from the packaging edge 3 in a following step and thus to arrive at the entire package contents 4. For easy removal of the entire closure film 10 from the edge of the packaging 3, a gripping tab 16 is provided laterally.

Fig. 10 relates to a package 1 according to the in Fig. 9 shown embodiment, however, a ventilation section 15 is provided here next to a removal section 14, which is also manually or with a tool in the closure film 10 to be pressed open.

Fig. 11 represents a package 1 with four receiving chambers 6, 7, 8 and 9 for receiving different packaging contents 4, 5. Each receiving chamber 6, 7, 8 and 9 each have a removal portion 14 of the closure film 10, which in the open state along a portion of his Peripheral each with a connecting foil portion 19 remains connected to the closure film 10.

Fig. 12 shows a package 1 with a receiving chamber 6, which is provided with a small-area removal portion 14. This removal section 14 can preferably be opened by pressing in with a pointed object or a tool.

So that the opened removal section 14 does not inadvertently reach the interior of the packaging 1, the contour of the weakening line 11 is in turn interrupted by a connecting foil section 19 without weakening line.

Fig. 13A shows a variant of a closure film 10 according to the invention in a sectional view from the side. The closure film 10 shown here comprises a layer group 100 with a single film layer 101. This so-called monofilm has, in the region of the weakening line 11, a film layer thickness 13 which is reduced by 40% compared with the film layer thickness 12 of the adjacent closure film 10, for example. The material removal of the sealing film 10 at the weakening line 11 was produced here by means of a high-energy laser pulse on the outside of the closure film side.

It is also possible within the scope of the invention to provide the material removal of the sealing film only on the inside or on both sides opposite one another on both sides of the film. These variants are not shown in the figures.

Fig. 13B shows a further embodiment of a closure film 10 according to the invention, in which case the layer group 100 consists of a first film layer 101, a second film layer 102 and a third film layer 103. The film layers 101, 102 and 103 are inseparably connected by lamination. The film layer 101 is made of Oriented Polyester (OPET) and the Oriented Polyamide (OPA) film layer 102, for example. These two film layers 101 and 102 are completely severed in the region of the weakening line 11. The third film layer 103, which is made of polyethylene (PE) for example, remains intact in the region of the weakening line 11 of the closure film 10. Because of its food-safe properties, the film layer 103 of PE forms the inside of the closure film 10 oriented to the package contents 4.

Fig. 13C relates to a further variant of a closure film 10 according to the invention in a sectional view from the side. The closure film 10 shown here comprises a layer group 100 with four film layers 101, 102, 103 and 104, which are connected inseparably by lamination. The film layer 101 is here made, for example, from oriented polyamide (OPA) and the inner film layer 103 from oriented polyester (OPET). The film layer 101 is completely severed in the region of the weakening line 11 'arranged on the outside of the closure film 10. The inner film layer 103 is completely severed in the area of the inner weakening line 11 ", the two further film layers 102 and 104, which are for example are each made of polyethylene (PE), remain intact in the region of the lines of weakness 11 'or 11 "of the closure film 10. This closure film 10 has in the region of the lines of weakness 11' and 11" a relation to the film layer thickness 12 of the adjacent closure film 10, for example 50% reduced film layer thickness 13, which in the area of the weakening line 11 essentially consists of the remaining film layer thickness 13 'of the film layer 102 and the remaining film layer thickness 13 "of the film layer 104. The material removal of the closure film 10 at the weakening lines 11' and 11" became Here, by using a high-energy laser pulse on the outer sides of the closure film 10 using the different degrees of absorption of the individual film layers 101 and 103 relative to the degree of absorption of the two remaining film layers 102 and 104 produced.

The pictures Figs. 14A to 14C each show a variant of a packaging 1. A cup-shaped packaging container 2 made of plastic is closed at its packaging edge 3 with a peelable sealing film 10. A grip tab 16, which is connected to the closure film 10, is folded up to protect the removal section 14 during transport or during storage of the package 1 and removably attached to the outside of the closure film 10 in the region of the removal section 14. In this in Fig. 14A shown grip ring 16 provides protection against unintentional opening for the provided with a line of weakness 11 the periphery of the underlying removal section 14th

As in Fig. 14B is illustrated to open the removal portion 14, first the grip tab 16 detached from the attachment portion 22 on the outside of the closure film 10 and opened in the direction of arrow 21.

Fig. 14C shows the package 1 in already partially open state. By further tightening or by lifting the now projecting gripping tab 16, the removal portion 14 along the line of weakness 11 can be easily opened.

The pictures FIGS. 15A to 15C each show different versions of packaging 1, which each have divided to be opened removal sections. The packaging 1 shown each comprise a packaging container 2 with substantially the same outer shape, wherein at the upper edge of the packaging 3 of the packaging package 2 to protect the packaging contents 4 each have a closure film 10 is attached. The closure sheets 10 are each as one Layer group 100 composed of several interconnected film layers. The closure films 10 each have a grip tab 16.

For example, the packages 1 have hitherto been closed in each case with a conventional, continuous closure film without any weakening lines, wherein after gluing or welding on the closure film at the upper packaging edge 3, the closure film at its outer film edge substantially in shape of the outer packaging edge 3, for example by means of an existing die 24 and . of a corresponding mechanical tool was punched or cut out.

Now, as in the embodiments FIGS. 15A to 15C The packaging container 2 in each case is closed by a produced closure film 10, which has weakening lines 11 which are produced on the closure film 10 with the aid of a laser beam. The lines of weakness 11 are positioned so that they are respectively arranged in the area within the receiving chamber 6, for example as perforations 11 and thus weaken the sealing film 10 in sections.

In the area of the grip tab 16, the closure film 10 is separated by setting a parting line 23, which is positioned substantially in extension of the weakening lines 11 and extends from the outside to the packaging edge 3 of the packaging package 2. In Fig. 15A and Fig. 15C In each case, two separate grip tab sections 16 'and 16 "are provided with an intermediate parting line 23. In the in Fig. 15B three gripping tab portions 16 'and 16 "are provided with two intermediate dividing lines 23. The dividing lines 23 are likewise produced by means of a laser beam, whereby all foil layers of the closing foil 10 are severed along the parting lines Grip portion 16 'is opened in each case a small part removal section 17 connected thereto which lies within the weakening lines 11 in the region of the receiving chamber 6. After partial removal or ventilation of the packaging contents 4, the main removal section 14 of the closure film connected thereto can be tightened on a second grip section 16' 10 are opened and the sealing film 10 are removed, for example, along the entire packaging edge 3. The contents of the package 4 is now completely exposed and can be conveniently removed from the packaging container 2.

Advantageously, the existing punching die 24 continues to punch out or

Cut the outer contour of the sealing film 10 are used. Thus, with an otherwise unchanged outer shaping, a packaging 1 which was previously produced with a conventional continuous closure film with only a single grip tab can be adapted in a particularly simple and cost-effective manner by using laser technology such that at least two are separated with a closure film 10 according to the invention Gripping tabs 16 ', 16 "which can be actuated from one another and two or more part removal sections 17 or removal sections 14 to be opened separately can be realized without requiring additional expensive mechanical stamping or embossing tools with a changed contour.

Fig. 15A shows an asymmetrical course of the weakening line 11, wherein a first small part removal portion 17 serves as a pouring opening and after opening of the removal portion 14, the closure film 10 remains partly still attached to the packaging container 2.

Fig. 15B shows a symmetrically arranged to the grip tab 16 line of weakness 11, wherein the part removal portion 17 forms a pouring opening for the package contents. The remaining sealing film 10 can then be completely removed from the packaging container 2.

In Fig. 15C an asymmetrically arranged line of the weakening line 11 is shown, wherein after the opening of the part removal section 17 within the line of weakness 11, the remaining sealing film 10 can also be completely removed.

List of position signs:

1

packaging

2

container size

3

packaging edge

4, 5

package contents

6, 7, 8, 9

receiving chamber

10

sealing film

100

Location group

101

first film layer

102

second film layer

103

third film layer

104

fourth film layer

11

Weakening line (or 11 ', 11 ")

12

Film thickness

13

reduced foil layer thickness (or 13 ', 13 ")

14

removal section

15

ventilation section

16

Grip bottle (or 16 ', 16 ")

17

Part removal section

18

Width of the part removal section

19

Connection film portion

20

Web width of the connecting film section

21

arrow

22

Attachment section for the grip tab

23

parting line

24

die

Claims (15)

1. A sealing film (10) for sealing a packing drum (2) on its packing rim (3), wherein the sealing film comprises a layer group (100) as well as at least one weakening line (11, 11', 11") defining the periphery of a removal section (14), through which removal section (14) in the opened state a packaging content (4, 5) is withdrawable, wherein the at least one weakening line (11, 11', 11") weakens the sealing film (10) at least in sections and the weakening line (11, 11', 11") is producible on the sealing film (10) on one side and/or on both sides by means of a laser beam, the sealing film (10) is detachably fastened to the packing rim (3), wherein at least one removal section (14) is openable in a divided fashion, wherein at least two partial removal sections (17) are connected to only one grip lug (16, 16', 16") so as to be openable and, in the opened state, one connecting film section (19) each located between adjacent partial removal sections (17) remains connected to the packing rim (3), characterized in that the sealing film (10) comprises a single layer group (100) made up of one or several inseparably interconnected film layers in order to allow a first liquid fraction of the packaging content (4) to be removed without thereby emptying out a further solids-containing fraction of the packaging content (4).
2. A sealing film (10) according to claim 1, characterized in that the weakening line (11") is producible on at least one inside film layer (103) of the sealing film (10) on one side and/or on both sides by means of a laser beam.
3. A sealing film (10) according to claim 1 or 2, characterized in that the layer group (100) is formed by a single film layer (101).
4. A sealing film (10) according to claim 1 or 2, characterized in that at least two film layers (101; 102; 103; 104) of the layer group (100) are inseparably interconnected in particular by lamination.
5. A sealing film (10) according to any of claims 1 to 4, characterized in that at least one further weakening line (11, 11', 11") defining the periphery of a venting section (15) is provided, through which venting section (15) in the opened state the packaging content (4) can be aerated.
6. A sealing film (10) according to claim 5, characterized in that, at the weakening line (11, 11', 11 "), the sealing film (10) has a reduced film layer thickness (13) from 10% to 90%, in particular from 20% to 80%, preferably from 30% to 70%, of the entire film layer thickness (12).
7. A sealing film (10) according to any of claims 1 to 6, characterized in that at least one removal section (14) and/or venting section (15) is/are mechanically impressible in each case, with the weakening line (11, 11', 11") at the periphery of the at least one removal section (14) and/or venting section (15) being interrupted always around a connecting film section (19).
8. A sealing film (10) according to any of claims 1 to 7, characterized in that at least one removal section (14) and venting section (15) is, in each case, connected to one grip lug (16, 16', 16") of the sealing film (10) so as to be openable.
9. A sealing film (10) according to claim 8, characterized in that the at least one removal section (14) and/or venting section (15) is, in each case, arranged adjacent to the packing rim (3) or overlapping it.
10. A sealing film (10) according to any of claims 1 to 9, characterized in that a web width (20) of a connecting film section (19) amounts to half to three times, preferably one to two times, the width (18) of a partial removal section (17).
11. A sealing film (10) according to any of claims 1 to 10, characterized in that a further removal section (14) is provided around the at least one removal section (14) exhibiting partial removal sections (17), which further removal section is openable separately from the partial removal sections (17) upon a partial removal of the packaging content (4, 5).
12. A sealing film (10) according to any of claims 8 to 11, characterized in that at least one removal section (14) and/or venting section (15) is coverable by a grip lug section (16, 16', 16").
13. A sealing film (10) according to any of claims 1 to 12, characterized by at least one material or material mixture for the manufacture thereof, selected from the group of: polyethylene, polypropylene, polyester, polyamide, aluminium, paper, PVC.
14. A packaging (1) comprising a packing drum (2) as well as a sealing film (10) which, for sealing the packing drum (2), is sealingly attachable to the packing rim (3) thereof in particular by heat-sealing, gluing or pressing, characterized by a sealing film (10) according to any of claims 1 to 13.
15. A packaging (1) according to claim 14, further comprising a packing drum (2) having several receiving chambers (6, 7, 8, 9), characterized by at least one removal section (14) and/or venting section (15) in the sealing film (10) of at least two receiving chambers (6, 7, 8, 9).

Images