Pouring element and composite package with improved opening performance

Abstract

The present invention relates to a tipping element (1, 1') for a composite package (P, P'), comprising: - an integral body (3, 3') having a flange (4, 4'), a hollow cylindrical opening (5, 5') defining a central axis (Z), and a closure member (6, 6') formed in the opening (5, 5'), the closure member extending substantially perpendicular to the central axis (Z) and having a weak area (7, 7'); - a hollow cylindrical cutting element (11, 11') movably guided in the opening (5, 5') and having at least one cutting tooth (12, 12') for cutting the weak area (7, 7') to open the opening (5, 5') and the composite package; - a re-tightening screw cap (2, 2') for driving the cutting element (11, 11') when the composite package is first opened. Two alternative composite packaging elements (P, P') for liquid foods are also described, designed such that the pouring element according to the invention is integrated into the gable wall region of the composite packaging element. A more advantageous alternative pouring element (1, 1') without additional barrier foil is designed, such that at least 92% by weight of the body (3, 3') is composed of HDPE and the body (3, 3') has 12 ml O2 / (m³) according to ASTM D3985. 2 *day) to 23ml O2 / (m 2 The oxygen transport rate (in days) is measured by a measuring surface that extends perpendicularly to the central axis (Z) and through the flange (4, 4') of the body (3, 3').

Description

Technical Field

[0001] This invention relates to a tipping element for composite packaging, comprising:

[0002] - A one-piece body having a flange, a hollow cylindrical opening defining a central axis, and a closing member formed in the opening, the closing member extending substantially perpendicular to the central axis, the closing member having a weak area.

[0003] - A hollow cylindrical cutting element, which is movably guided within the nozzle and has at least one cutting tooth for cutting through the weak area to open the nozzle and the composite package.

[0004] - A re-tightening screw cap, which is used to drive the cutting element when the composite package is first opened. Background Technology

[0005] This tipping element is integrated as part of the gable wall of the composite package to simplify handling during tipping and the possibility of resealing the composite package. This type of tipping element is illustrated, for example, in the applicant's EP-A-2 627569. A hollow cylindrical cutting element initially opens the body, thereby opening the previously airtight package and thus forming a dispensing opening, in which a screw cap allows the now-opened composite package to be resealed. The cutting element, movably guided within the opening, is provided with a force-transmitting element and is thereby driven by a corresponding force-transmitting element on the screw cap. During the initial opening, the cutting element approaches the closure, and after the initial contact of the two elements, the cutting teeth of the cutting element separate the closure approximately in the area of ​​the weak point. The path of movement of the cutting element corresponds to a typically annular weak point.

[0006] For example, the opening process can be divided into several parts. If the two components are already in contact in the assembled state, the approach of the cutting element described above can also be omitted. The cutting element then moves through the closing component and separates it along the cutting line using the cutting teeth. This separation process is a combination of separation, plastic deformation, and material displacement, in which uniform and controlled application of force is advantageous. Once most of the circumferential part is separated, the cutting element begins to fold the closing component to the side, thereby releasing the opening of the contents. Folding is carried out by means of the unseparated remaining portion of the weak area as a pivot axis, wherein during the folding process, the outer side of the cutting teeth and then the cutting element applies force to the closing component, thereby pressing it to the side. After the tipping element has been fully opened, the closing component is approximately parallel to the central axis Z along the outer wall of the screwed-in cutting element.

[0007] Pouring elements with such closure components are primarily, but not exclusively, used in aseptic packaging. In this case, previously sterilized food is packaged under aseptic conditions in similar sterilized packaging materials to obtain so-called aseptic packaging. In addition to the aforementioned aseptic properties, various types of composite packaging in which pouring elements according to the invention can be integrated are also available.

[0008] In the first approach, the tipping element is an integral part of the composite package introduced during its manufacture. For this purpose, the cut of the composite material, initially formed into a package sleeve by sealing longitudinal seams, is typically first attached to the tipping element in a so-called "fill and seal" packaging machine (FFS). These semi-formed products, open on one side, are then filled with the product and subsequently sealed. This first step can be provided in different ways: for example, a flange can be attached to one side of the package sleeve by another plastic element, which is injection molded directly in the packaging machine. The flange can also be welded directly to the package sleeve, or even adhered to the package sleeve without the use of an additional plastic element. In this case, to save plastic, the flange can be designed to be the same size as or smaller than the opening of the package sleeve. In the case of a smaller flange, the surface of the package sleeve must be folded together and then placed on and welded to the flange. Preferably, such a composite package has a polyhedral gable surface, which is correspondingly attached to a polyhedral flange of the tipping element, wherein the polyhedral flange substantially corresponds to a pyramidal piling.

[0009] In the second approach, an initially fully sealed composite package is manufactured, in which perforations are present, typically in the gable region, into which a pouring element is introduced. The pouring element is usually inserted by welding flanges to at least one layer of the composite material; alternatively, these components can also be adhered. This second type of composite packaging is further characterized by the fact that the insertion of the pouring element can be independent of the manufacture of the composite package. The manufacture of the perforations and the insertion of the pouring element can therefore be performed before, during, or after the manufacture of the composite package itself. To avoid unnecessarily complicating the packaging machine itself, both steps are preferably performed before manufacture. This arrangement of the production steps also represents the simplest possibility for inserting the pouring element from the inside into the perforations. Such composite packages are typically manufactured in one of two types of packaging machines. In this first alternative, annular webs of sterilized composite material are formed into tubes and sealed, then filled with similar sterilized products and sealed and cut at equal intervals laterally. The produced “packaging pads” are then formed into parallelepiped packages along pre-folded edges. The sealing joint formed during the transverse sealing of the gable region is generally referred to as a gable joint. A second alternative uses a composite preform, which is first formed into a package sleeve by sealing the longitudinal joint, then formed into a package body with one open side on a mandrel, then sterilized, filled, and finally sealed and finalized. In this case, the gable region can be designed differently, for example, as a surface parallel to the base (flat gable package), as a surface formed at least partially at an angle to the base (sloping gable package), or even as a saddle-shaped roof with two opposing sloping surfaces ("gable top" package).

[0010] The precise layer structure of the composite material can vary according to requirements, but it at least consists of a cardboard carrier layer and a plastic cover layer. Furthermore, a barrier layer (e.g., aluminum (Al), polyamide (PA), or ethylene-vinyl alcohol copolymer (EVOH)) may be necessary to ensure enhanced blocking of gases from sterile products and, in the case of aluminum, light. Therefore, this type of composite packaging is also referred to as a cardboard / plastic composite packaging. If the pouring element is integrated as part of the composite packaging, it should have a similar strong blocking effect against gases and light as the composite material used. Simultaneously, inexpensive materials that are easy to recycle should be used. This also applies particularly to the material of the pouring element used.

[0011] In the aforementioned prior art, the necessary gas barrier is addressed by selecting a favorable substrate, LDPE, for the body, and then supplementing the LDPE with a barrier foil adjacent to the body to achieve a very low oxygen transport rate. While this allows for advantageous manufacturing of the body itself, the expensive barrier foil and another error-prone production step are necessary. Besides the ever-important issue of cost, this also creates potential problems because non-uniformity forms at the edge of the foil, which has proven problematic during aseptic processes, as it can potentially create a non-sterile bag section between the body and the barrier foil. Summary of the Invention

[0012] Therefore, the object of the present invention is to design and further develop the tilting element mentioned at the beginning and previously described in more detail, so that the described disadvantages are overcome.

[0013] This objective is achieved in the pouring element provided in the embodiments of this disclosure by wherein at least 92% by weight of the body is composed of HDPE and the body has an O2 / (m²) content according to ASTM D3985. 2 (day) to 23 ml O2 / (m 2 The oxygen transfer rate (O2 / (m²)) is measured using a measuring surface perpendicular to the central axis and extending through the flange of the body. In principle, because many foods packaged in composite packaging are sensitive to oxygen, a lower oxygen transfer rate is desirable, thus enabling a longer shelf life. Less than 12 ml O2 / (m²) 2 Values ​​of even smaller than 10 ...

[0014] Therefore, the expensive and complex barrier foil is omitted to obtain a foil-free, one-piece body, which is itself made of more expensive HDPE, but is significantly cheaper overall. As the names suggest, the difference between LDPE (low-density polyethylene) and HDPE (high-density polyethylene) is based on their density. The density is around 940 kg / m³. 3 Up to 970 kg / m 3Polyethylene is generally considered to be HDPE. In addition to its higher density, the higher crystallinity and different crystalline morphologies compared to LDPE provide better oxygen barrier properties, resulting in a lower oxygen transport rate through the HDPE component. HDPE typically has a crystallinity of approximately 50% to 80%. In most cases, in addition to at least 92% by weight of HDPE, a small amount of so-called masterbatch is added to the matrix. For example, lubricants or anti-blocking agents may be added to facilitate the release of the part from the injection molding tool, or light stabilizers may be added, as in one of the described embodiments, light stabilizers absorbing a specific wavelength range of incident radiation. Other commonly used masterbatches are, for example, nucleating agents, color masterbatches, or agents used to improve impact strength. Typically, the corresponding materials are pre-mixed at the time of sale for use in a particular molding process.

[0015] In addition to material selection, the design of the weak point in the body also improves oxygen barrier performance. Specifically, the axial height of the weak point and the surface area through which it extends have a significant impact, as oxygen transport primarily occurs through this region. In particular, if the body is manufactured by injection molding, molten material must be pressed through the weak point during injection molding to fill the entire molding tool. To ensure complete filling of the body, the weak point, measured parallel to the central axis, should have a height of at least 0.1 mm, for example, 0.13 mm. Therefore, the combination of the size and internal structure of this weak point represents a further influence on the rate of oxygen transport through the entire body, where the desired range of oxygen transport rates can be achieved through various implementations. If possible, the measuring surface through which the oxygen transport rate is measured should cover the entire body, but in any case, the entire weak point (or its projection along the central axis onto the measuring surface) must be contained therein. In ASTM D3985, oxygen transport is primarily measured on a foil held in the measuring device by a sealing material, which also simultaneously defines the measuring surface. Similarly, more complex components, such as the body specified herein, can also be measured in such a measuring device according to the standard. Typically, a two-component epoxy adhesive, such as "Devcon 5-minute epoxy," is used for sealing, where the body is attached, for example, to a sample holder suitable for the body, or to any flange of a suitably sized measuring device.

[0016] As described above, there are various non-inventive embodiments of the main components. For example, one known from the prior art has a barrier foil attached to the component, which, depending on the choice of foil, typically has 2.5 ml O2 / (m 2 (day) to 10 ml O2 / (m 2 The oxygen transport value (days). Without the sealing foil, the actual main component is at 40 ml O2 / (m²). 2 (day) to 50 ml O2 / (m 2 Within the range of (days), and if LLDPE, i.e., linear LDPE, is used, this value even increases to 60 ml O2 / (m 2 sky).

[0017] Another design of the present invention proposes that the main body has less than 20 ml O2 / (m 2 (days), preferably less than 18 ml O2 / (m 2 The oxygen transport rate (day) is measured by a measuring surface that extends perpendicular to the central axis and through the flange of the body.

[0018] Another teaching of the invention proposes that the height of the weak zone is less than 50% of the height of the remaining closure component measured parallel to the central axis. This, combined with a stable closure component, ensures clean separation of the weak zone, which can also be fully folded to the side at the end of the opening process. Simultaneously, this ensures that most oxygen transport occurs through the weak zone, as the remaining closure component is designed to be significantly thicker. In the weak zone, the lower wall thickness and higher pressure during tooling manufacturing affect crystallinity. For example, faster cooling in thinner areas of the main components results in higher and more uniform crystallinity. Preferably, the height of the weak zone is even less than 25% of the height of the remaining closure component.

[0019] In a further advantageous embodiment, the weak zone is designed as annular and directly connected to the nozzle. On the one hand, this simplifies the production of the body, as the transition area between the nozzle and the closure component can be formed more attractively. On the other hand, forces are better transmitted during separation and absorbed by the nozzle.

[0020] In a further advantageous embodiment, the entire pouring element allows less than 1% light transmittance in the wavelength range of 350 nm to 550 nm before initial opening. In addition to the high-oxygen barrier, the composite packaging itself also has a light-blocking element. These blocking effects can originate from different layers of the composite structure, such as an aluminum barrier layer, or partly through the carrier layer. Since the composite material is not continuously formed in the region of the pouring element, the usual blocking effect cannot be guaranteed; therefore, supplementing the pouring element with a masterbatch in a manner with a similar blocking effect is the easiest and most cost-effective approach. Such light-blocking elements are particularly useful for photosensitive products such as milk. Damage to such products first occurs in the wavelength range of 350 nm to 550 nm, which is why light should be absorbed specifically there. If such a masterbatch is not introduced into the material for specific light absorption, at least 96% by weight of the bulk composition can also be made of HDPE, as light-absorbing masterbatches are typically added in amounts of 4% to 6% by weight. Any spectrophotometer can be used to perform measurements by following the manufacturer’s instructions, such as the Specord 250 Plus from Anakitik Jena or the Perkin Elmer LAMBDA 850+.

[0021] In a further embodiment of the invention, both the cutting element and the screw cap are composed of polyolefins. As mentioned above, the body is composed of monolithic HDPE, which is also a known polyolefin. In particular, in the case of the cutting element, this choice reduces costs compared to known cutting element materials (e.g., polystyrene), which were previously used in pouring elements with closure components according to the invention. Materials such as polystyrene tend to cause problems if there are long dwell times during production, for example, in the event of a malfunction. This quickly leads to thermal degradation of the material, making it undesirably glassy. Such problems can be avoided by choosing polyolefins. Despite these advantages, known materials are actually more suitable as cutting elements for pouring elements with closure components in terms of opening performance. Surprisingly, it has been shown that polyolefin cutting elements are sufficient to separate the body according to the invention without the need for a barrier foil. Furthermore, this continuous material selection facilitates the recycling of the entire pouring element.

[0022] A further design of the invention proposes that the entire pouring element be composed of renewable raw materials. Typically, polyolefins are produced from fossil raw materials such as ethane, liquefied petroleum gas, or petroleum. Recently, there has been a growing search for alternatives to obtain more sustainable products. Bioethanol has proven to be a viable alternative to well-known fossil raw materials and has been produced from starch-, sugar-, or cellulose-containing raw materials. These raw materials do not require intensive agricultural management and are preferably grown on poor soil. Polyolefins can then be produced from this bioethanol using conventional processes. In this case, all components of the pouring element are made of polyolefins, and therefore can be manufactured with relatively little effort, even if made from the same renewable raw materials.

[0023] In a further embodiment of the invention, the cutting element is composed of polypropylene. Of course, polypropylene is also a polyolefin, and the aforementioned advantages generally apply to this embodiment as well. Polypropylene is suitable as an inexpensive alternative to conventionally used materials for known pouring elements with closure components.

[0024] Another advantageous implementation involves polypropylene having a flexural modulus of at least 1900 MPa. In particular, in the case of pouring elements with a body of a stronger material such as HDPE, it is advantageous to use a rigid material with a correspondingly high flexural modulus as the cutting element. This ensures that the cutting element has a stable effect at the desired location (in the weak area), and the closure part also separates cleanly there, for example, without tooth-like lateral bending. Typically, such a material also results in improved cutting performance when scribing and cutting through the closure part or the weak area.

[0025] In a further advantageous embodiment, the cutting teeth extend circumferentially in a plane perpendicular to the central axis at the end facing the weak area. The flattened end of the cutting teeth ensures that the cutting teeth more stably separate the weak area and are guided along the intermediate region. If the portion projected onto the intermediate region is large enough that the end extending circumferentially in a plane perpendicular to the central axis is positioned above the intermediate region, this also ensures that the cutting edge of the cutting teeth is cleanly oriented outward from the intermediate region until it reaches an area thin enough to separate, such as the weak area itself.

[0026] A further design of the invention is that the cutting element is designed to be radially thickened in the region of the cutting teeth. This reinforcement in the alignment of the cutting teeth ensures that the forces occurring at various stages of the opening process are absorbed without any problems. This is particularly useful because the cutting teeth are the protruding portion of the cutting element and are therefore prone to breakage. For example, the adjustments to the cutting element related to the cutting process described in the preceding embodiments are typically located in the region of the cutting teeth. However, to save as much material as possible in the remaining cutting element, it is usually sufficient to limit this variation locally. In this sense, any reinforcement of the cutting element can be considered a thickening, designed to protrude inward from the hollow cylinder and, for example, have a maximum of 95% of the inner radius of the remaining hollow cylinder.

[0027] In a further advantageous embodiment, the cutting element has two cutting teeth. In principle, the more cutting teeth formed on the cutting element (provided they are reasonably and regularly distributed in the circumferential direction), the faster the cutting element will pass through the separation stage and transition to folding. On the other hand, when opened with each additional cutting tooth, the force increases, which simultaneously penetrates the closure component with cutting teeth of the same length. This choice achieves a good trade-off between the necessary rotation of the screw cap and the required force.

[0028] In a further embodiment of the invention, the injection point is located on the closed component along the central axis. In most cases, the individual components of the pouring element are manufactured via an injection molding process. Here, a tool with the negative shape of the part to be produced is filled with liquid plastic, which then solidifies before the tool is opened, thereby ejecting the finished part. Typically, the liquid plastic is filled through a single nozzle, whereby, during ejection, the solidified plastic part separates from any remaining plastic still in the nozzle.

[0029] Of course, this separation can also occur before the liquid is injected through the nozzle itself. In all cases, a noticeable and often prominent surface irregularity will appear on the plastic part, which is often referred to as the injection point. The slower the liquid plastic is filled, the more material must be squeezed through narrow points (e.g., weak areas). Surprisingly, it has been shown that the advantage of a central injection point, and therefore the uniform filling of the entire body, dominates, although most of the liquid plastic must subsequently move through weak areas.

[0030] In an advantageous embodiment of the invention, a composite packaging for liquid food is provided, such that a pouring element according to the invention is integrated into the veneer region of the composite packaging. As already explained, various methods exist for manufacturing such composite packaging. In this case, the pouring element is typically used primarily to close the opening in the veneer region and plays a relatively minor role in the dimensional stability of the composite packaging.

[0031] Another advantageous embodiment of the invention relates to a composite package configured such that a pouring element according to the invention is integrated into a gable region of the composite package, wherein the gable region has a polyhedral gable surface correspondingly connected to a polyhedral flange of the pouring element. As previously described, this combination allows for the formation of a bottle-shaped composite package without the need for other components.

[0032] ASTM D792–20 is used to determine the density of plastics. ISO 178 is a suitable method for determining the flexural modulus. Attached Figure Description

[0033] The invention will now be explained in more detail with reference to the accompanying drawings, which illustrate only two preferred exemplary embodiments. The drawings show:

[0034] Figure 1 A perspective view of the tilting element according to the present invention.

[0035] Figure 2 A plan view of the tilting element according to the present invention.

[0036] Figure 3 : Figure 2 The tilting element according to the invention has a vertical section along line III-III.

[0037] Figure 4 : Figure 3 Detailed view of the vertical section.

[0038] Figure 5 During the opening process Figure 3 Detailed view of the vertical section.

[0039] Figure 6 Plan view of the screw cap.

[0040] Figure 7 : Figure 6 The screw cap along the vertical section of line VII-VII,

[0041] Figure 8 : Figure 6 A bottom perspective view of the screw cap.

[0042] Figure 9 :according to Figure 3 Top perspective view of the cut element.

[0043] Figure 10 : A bottom perspective view of the cut component

[0044] Figure 11 : A cross-sectional perspective view of a composite package with an integrated tipping element according to the invention after the initial opening and resealing of the screw cap.

[0045] Figure 12 A perspective view of a tilting element according to a second exemplary embodiment of the present invention.

[0046] Figure 13 : Figure 12 A plan view of the tilting element according to the present invention.

[0047] Figure 14 : Figure 13 The vertical cross-section of the tilting element according to the present invention along line XIV-XIV,

[0048] Figure 15 : Figure 13 The vertical cross-section of the tilting element according to the present invention along line XV-XV,

[0049] Figure 16 : Figure 15 Detailed view of the vertical section.

[0050] Figure 17 A perspective view of the screw cap of the second exemplary embodiment, and

[0051] Figure 18 : Perspective view of the cutting element in the second exemplary embodiment. Detailed Implementation

[0052] The figure illustrates two preferred embodiments of the tilting elements 1 and 1' according to the present invention, so as to clarify the operating mode when opened. Figure 1 A first tipping element 1, with a central axis Z, is shown in its closed state without the composite package P. A re-tightening screw cap 2, for initial opening and re-sealing of the composite package P, is located on a body 3, which is only... Figure 3 It is clearly visible in the middle, in Figure 1 Only one circumferential flange 4 is visible, which is used for connection and integration into the composite package P. Figure 2 The plan view also includes section line III-III.

[0053] Figure 3A vertical cross-section of the entire pouring element 1 along section III-III is shown. The body 3 also has a hollow cylindrical nozzle 5 and a sealing member 6 formed in the nozzle 5. The sealing member 6 includes an annular weak zone 7 adjacent to the nozzle 5, a central region 8 that seals most of the dispensing opening, and a conical annular intermediate region 9 extending between the weak zone 7 and the central region 8. The chamfer of the intermediate region 9 compensates for the thickness difference between the central region 8 and the weak zone 7. In this cross-sectional view, it can also be seen that both the circumferential flange 4 and the central region 8 have a height approximately six times that of the weak zone 7. This clearly shows how oxygen permeates most through the weak zone 7, where the seal of the screw cap 2 to this interior of the pouring element 1 can never be designed to be completely airtight.

[0054] A first thread pair 10A and 10B exists between the outer sides of the screw cap 2 and the nozzle 5, allowing the screw cap 2 to be screwed on and tightened. A hollow cylindrical cutting element 11 with two cutting teeth 12 is arranged inside the body 3, which separates the closure component 6 when the tipping element 1, and thus the composite package P, is first opened. The central axis Z is defined by the concentrically arranged hollow cylindrical element of the nozzle 5 and the cutting element 11, wherein the cutting element 11 rotates about and moves along the central axis Z during opening. This movement is defined by a second thread pair 13A and 13B located between the inner side of the nozzle 5 and the cutting element 11. During this movement, the cutting element 11 is driven on at least one force receiving element 14, which interacts with at least one corresponding force transmitting element 15 of the screw cap 2.

[0055] Figure 4 and Figure 5 The detailed view shows how the cutting tooth 12 strikes the weak area 7 and the middle area 9 and begins to separate the area. Figure 3 and Figure 4 The original arrangement of the components before initial opening is shown. Figure 5 The arrangement of the components during the opening process is shown. It is particularly easy to see here how the cutting element 11 and therefore the cutting teeth 12 are arranged above the central region 9, since the inner boundary of the projection of the cutting teeth 12 is also shown with a projection line indicated by dashed lines.

[0056] Figures 6 to 8 Roughly corresponding to Figures 1 to 3 The view in the image shows only the screw cap 2. In this case... Figure 7 Half of the first thread pair 10A and Figure 8The three force-transmitting elements 15 are particularly clearly visible. The screw cap 2 also has a strip 16 and an anchoring ring 17 serving as tamper-evident seals. For this purpose, the strip 16 immediately disengages from the rest of the screw cap 2 upon initial opening and remains clearly separated in its original position. A stop element 18 on the strip 16 hooks onto a corresponding element on the body 3, ensuring that the strip 16 is disengaged from the rest of the screw cap 2 during separation before the cutting element 11 damages the integrity of the closure component 6. The anchoring ring 17 also disengages during initial opening and then remains on the opening 5, wherein the anchoring ring 17 and the rest of the screw cap 2 are held together by a retaining element. These are designed so that the screw cap 2 can be folded to the side after being unscrewed from the opening 5, allowing it to be tilted. The arrangement of the aforementioned components of the screw cap 2 and the corresponding elements of the opening 5 can also be... Figure 4 and Figure 5 See the detailed view.

[0057] exist Figure 9 and Figure 10 In the diagram, the individual cutting element 11 is also shown in two different perspective views. The two cutting teeth 12 formed at the lower end of the cutting element 11 are now clearly visible. Three force receiving elements 14 can also be seen on the inner wall, and the threads of the second thread pair 13B can be seen on the outer wall.

[0058] exist Figure 11 In the cross-sectional view, the opened composite package P, which has a resealed screw cap 2, is visible from the inside, with the pull tab particularly prominent. This is due to the closure component 6 losing its tension during the separation process before the cutting element 11 can cut the complete circle. The pull tab, generally corresponding to the central region 8 and the intermediate region 9, is thus held only in a single segment of the weak region 7, pressed to the side by further movement of the cutting element 11, thereby releasing the dispensing opening. When the composite package P is opened, this segment of the weak region 7 is sufficient to hold the pull tab in its "folded" state, reliably preventing accidental tearing of the pull tab and complete cutting of the weak region 7. The cutting teeth 12, formed in the rotational direction at the front, are positioned at the initial opening end such that they are at the height of the pull tab, and thus stably hold the pull tab to the side.

[0059] The attached image Figures 12 to 18 A second preferred exemplary embodiment is shown, with particular emphasis on the differences. The remaining embodiments of the first exemplary embodiment also apply accordingly to the following sections. The flange 4' of the body 3' is here designed as a pyramidal post in the shape of a polyhedron. In particular, it should be noted that the contact surface with the composite material of the composite package P' is no longer located in a single plane, but is provided by the four side surfaces of the pyramidal post, such as... Figures 12 to 14As shown. Apart from the flange 4', the basic structure of the tipping element 1' is similar to the first exemplary embodiment: it is also a three-part tipping element 1', having a body 3', a screw cap 2', and a cutting element 11'. A first threaded pair 10A', 10B' is located between the outside of the screw cap 2' and the opening 5' of the body 3, and a second threaded pair 13A', 13B' connects the inside of the opening 5' to the cutting element 11', so that the cutting element 11' can be movably arranged. A similar element is also designed to transfer force from the screw cap 2' to the cutting element 11' during opening, wherein... Figure 17 and Figure 18 As can be seen, the screw cap 2' and the cutting element 11' are interconnected by two force transmission elements 14' and two force transmission elements 15', respectively.

[0060] at last, Figure 15 and Figure 16 It is clearly shown that the cutting element 11' can also be modified in that the cutting teeth 12', particularly in the upper region, are designed to be reinforced in thickness. Thus, the cutting element 11' is radially thickened inward, so that it protrudes into the middle region 9' in the assembled state and contacts the middle region 9' during opening.

Claims

1. A tipping element (1, 1') for a non-blocking foil in a composite package (P, P'), comprising: - A one-piece body (3, 3') having a flange (4, 4'), a hollow cylindrical opening (5, 5') defining a central axis (Z), and a closing member (6, 6') formed in the opening (5, 5'), the closing member extending substantially perpendicular to the central axis (Z), the closing member having a weak area (7, 7'). - A hollow cylindrical cutting element (11, 11') is movably guided in the opening (5, 5') and has at least one cutting tooth (12, 12') for cutting the weak area (7, 7') to open the opening (5, 5') and the composite package. - A re-tightening screw cap (2, 2') for actuating the cutting element (11, 11') when the composite package is first opened. Its features are, The body (3, 3') comprises at least 92% by weight of HDPE and the body (3, 3') has an O2 / (m²) content according to ASTM D3985. 2 (day) to 23 ml O2 / (m 2 The oxygen transport rate (day) is measured by a measuring surface that extends perpendicularly to the central axis (Z) and through the flange (4, 4') of the body (3, 3'). Measured parallel to the central axis (Z), the height of the weak zone (7, 7') is less than 25% of the height of the remaining enclosure (6, 6'), and the oxygen transport mainly occurs through this weak zone (7, 7'). The weak zone (7, 7') has higher and more uniform crystallinity.

2. The tilting element according to claim 1, Its features are, The main body (3, 3') has less than 20 ml O2 / (m 2 (days), or less than 18 ml O2 / (m 2 The oxygen transport rate of the body (3, 3') is measured by a measuring surface that is perpendicular to the central axis (Z) and extends through the flange (4, 4') of the body (3, 3').

3. The tilting element according to claim 1, Its features are, The weak zone (7, 7') is designed to be annular and directly connected to the port (5, 5').

4. The tilting element according to claim 1, Its features are, The entire tilting element allows less than 1% transmittance in the wavelength range of 350 nm to 550 nm before initial opening.

5. The tilting element according to claim 1, Its features are, The cutting element (11, 11') and the screw cap (2, 2') are also composed of polyolefin.

6. The tilting element according to claim 5, Its features are, The entire tilting element is made from renewable raw materials.

7. The tilting element according to claim 1, Its features are, The cutting elements (11, 11') are composed of polypropylene.

8. The tilting element according to claim 7, Its features are, The polypropylene has a flexural modulus of at least 1900 MPa.

9. The tilting element according to claim 1, Its features are, The cutting teeth (12, 12') extend circumferentially in a plane perpendicular to the central axis (Z) at the ends facing the weak area (7, 7').

10. The tilting element according to claim 1, Its features are, The cutting elements (11, 11') are designed to be radially thickened inward in the region of the cutting teeth (12, 12').

11. The tilting element according to claim 1, Its features are, The cutting element (11, 11') has two cutting teeth (12, 12').

12. A composite package (P) for liquid food, said composite package (P) being configured such that a pouring element (1) according to any one of claims 1 to 11 is integrated into the gable region of said composite package.

13. A composite packaging (P') for liquid food, said composite packaging (P') being configured such that a pouring element (1') according to any one of claims 1 to 11 is integrated into the gable region of said composite packaging (P'), wherein, The gable wall region has a polyhedral gable wall surface, which is correspondingly connected to the polyhedral flange (4') of the tilting element (l').

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