Moisture Barrier Packaging

Abstract

The present invention relates to a packaging (1) comprising a first body forming a container (2) and a second body forming a lid (3), wherein the container (2) and the lid (3) have moisture barrier properties in their respective walls (6, 8). The lid (3) has an inner dimension that is larger than the outer dimension of the container (2) and slides over at least a part of the outer surface of the container in a process that defines a sliding length (5) when the packaging is being opened or closed. The gap created by the difference in diameters allows for opening and closing without adversely affecting the moisture barrier properties of the packaging (1).

Description

Corresponding application

[0001] This application claims priority to the European Patent Application No. 22172784-5 specification previously filed on May 11, 2022 in the name of AISAPACK HOLDING SA, and the content of this previous application is hereby incorporated by reference in its entirety into this application.

Technical Field

[0002] The field of the present invention is packaging based on biosourced and / or biodegradable and / or recyclable materials. More specifically, the present invention relates to packaging with low environmental impact. The present invention is applied to cylindrical packaging that requires good moisture barrier properties. The present invention is particularly applicable to cellulose-based packaging. The present invention is especially in the field of packaging for dry products.

Background Art

[0003] U.S. Patent Application Publication No. 2013 / 153586 discloses an ice cream package consisting of a) a container component made of polystyrene, the container component comprising a base and side walls extending from around the base for forming a cavity in the container component, and b) manually removable closing means comprising an upper surface adapted to seal the cavity of the container component and a side wall extending from around the upper surface and adapted to surround the side wall of the container component.

[0004] U.S. Patent No. 5,348,180 discloses a container having a tamper-evident seal. A container suitable for the reception and transport of various products includes a hollow body member and a removable cover disposed at the open upper end of the body member, and has a tamper-evident seal device connecting the body member and the cover to prove premature removal of the cover. The seal device includes two sets of overlapping openings extending through the body member and the cover, and a closed sealing line or member extending through the sets of openings and around the respective inner and outer portions of the body member and the cover between the sets of openings to form a closed loop when sealed. A patch member is fixed to the inner surface of the body member to cover the openings, prevent contaminants from entering the container through the openings, and reinforce the area of the body member having the openings. The patch member preferably defines a guiding passage between the openings such that a sealing line can be inserted through one set of the openings, guided through the passage, and exit through the other set of the openings.

[0005] JP 2021-137982 A discloses double-sided laminated paper and a paper cup.

SUMMARY OF THE INVENTION

[0006] The present invention is in the field of packaging, particularly tubular packaging based on biosourced, or biodegradable, or recyclable materials for storing dry products. According to a preferred embodiment, the packaging is cellulose-based and can be recycled in the paper industry. The packaging comprises at least one container and a lid sliding over said container, and the packaging retains good moisture barrier properties over the service life of the packaging.

[0007] More specifically, the present invention relates to a tubular packaging comprising a container and a sealing lid that slides over the outer surface of the container over a height called the "sealing height". More specifically, in some embodiments, the present invention relates to a packaging formed by two tubular bodies of slightly different diameters, one of said bodies forming the container and the other forming the lid. According to the present invention, the lid has a diameter slightly larger than the diameter of the container and is press-fitted onto the outer surface of the container with the necessary clearance for opening and closing operations and slides over the outer surface. In the closed position of the packaging, the wall of the lid is overlapped with the wall of the container over the sealing height, which ensures the moisture barrier of the packaging even after the first opening or subsequent openings of the packaging.

[0008] According to the present invention, the container and the lid are based on biosource, or biodegradable, or recyclable materials and comprise at least one layer providing moisture barrier properties.

[0009] According to a preferred embodiment of the present invention, the container and the lid are based on cellulose and comprise at least one cellulose-based structural layer and one functional layer providing moisture barrier properties.

[0010] Surprisingly, it has been shown that a cellulose-based tubular packaging formed by a container and a lid press-fitted onto the outer wall of the container and sliding over the outer wall according to the principles of the present invention can have the same or even improved barrier properties for the same container when closed by a sealed lid under the specific conditions described in the remainder of this specification.

[0011] More specifically, it has been shown that in order to provide the improved barrier properties described above, the radial clearance between the outer diameter of the container and the inner diameter of the lid must be between 0.05 mm and 0.25 mm, preferably between 0.1 mm and 0.2 mm.

[0012] Similarly, it has been shown that the sealing length (i.e., the length of the press fit between the container and the lid) must be greater than 50 mm, preferably greater than 100 mm.

[0013] According to the present invention, the packaging is based on materials that are recyclable or biodegradable and / or derived from renewable resources. According to a preferred embodiment of the present invention, the packaging is cellulose-based and can be recycled at the end of its life in the paper industry. Preferably, the cellulose content of the packaging is greater than 85%, suitably greater than 90%. Preferably, the cellulose content of the packaging and the cellulose content of the lid are the same or similar. In another embodiment, these contents may be different.

[0014] According to the present invention, the packaging may also have air inlet and outlet means that facilitate the opening and closing of the packaging. The air inlet and outlet means are preferably connected to the lid, but are not limited thereto.

[0015] According to the present invention, the packaging may also have opening indication means for proving the first opening of the packaging.

[0016] In an embodiment, the present invention relates to a packaging comprising at least one first body forming a container and one second body forming a lid, wherein the container and the lid have moisture barrier properties on their respective walls, the lid has an inner dimension larger than the outer dimension of the container, and in a process defining a sliding length when the packaging is being opened or closed, the lid slides over at least a part of the outer surface of the container, and the gap created by the difference in said dimensions allows said opening and said closing without adversely affecting the moisture barrier properties of the packaging.

[0017] In an embodiment, the gap is preferably between 0.02 mm and 0.5 mm.

[0018] In an embodiment, the ratio H / D is greater than 1, preferably greater than 2, where H is the sliding length and D is the outer dimension of the container.

[0019] In an embodiment, the container and the lid each comprise an end wall or a bottom.

[0020] In an embodiment, the container and / or the lid and / or the bottom comprise a structural layer and a functional layer that provide water vapor barrier properties.

[0021] In an embodiment, the structural layer is preferably based on cellulose having a cellulose content of more than 70%.

[0022] In an embodiment, the functional layer is made of high-density polyethylene (HDPE) or polypropylene (PP). Other equivalent materials or blends of materials are possible.

[0023] In an embodiment, the functional layer forming the inner surface of the lid slides on the structural layer forming the outer surface of the container.

[0024] In an embodiment, the functional layer forming the inner surface of the lid slides on the functional layer forming the outer surface of the container.

[0025] In an embodiment, the structural layer of the container is confined between a first functional layer forming the outer surface of the container and a second functional layer forming the inner surface of the container.

[0026] In an embodiment, the lid comprises a flared end to make it easier to insert the lid onto the container. In some embodiments, the end of the container into which the lid is press-fitted comprises a constriction. The flared portion and the constriction can also be used on exactly the same packaging.

[0027] In an embodiment, the packaging comprises an opening indication system that proves that the packaging has been opened, for example, that the packaging has been opened for the first time.

[0028] In an embodiment, the packaging comprises a membrane seal fixed to an end of the container. The membrane seal can form or be part of an opening indication system.

[0029] In an embodiment, the packaging comprises air outlet or air inlet means to facilitate opening and closing of the packaging.

[0030] In an embodiment, the packaging has a circular, elliptical, oval or rectangular cross-section. Of course, other shapes are possible.

[0031] In an embodiment, the container and / or the lid is formed from a tubular body (or a body of another shape) made from a sheet, and the ends / edges of the sheet are welded or adhesively bonded to form a joining zone.

[0032] In an embodiment, the ends / edges of the sheet are butt-welded via a reinforcing strip, or welded or adhesively bonded by overlapping the ends / edges.

Brief Description of the Drawings

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DETAILED DESCRIPTION OF THE INVENTION

[0034] 1 Packaging 2 Tubular body forming the container 3 Tubular body forming the sliding lid 4 Opening indication system 5 Sliding length 6 Tubular wall of the container 6a Structural layer 6b Functional layer 6c Functional layer 7 End wall / bottom of the container 7a Structural layer 7b Functional layer 8 Tubular wall of the lid 8a Structural layer 8b Functional layer 9 End wall / bottom of the lid 9a Structural layer 9b Functional layer 10 Sliding zone 11 Membrane seal 12 Sheet joining zone 13 Air outlet means 14 Flared end

[0035] Figure 1 shows an exemplary embodiment of a packaging having water vapor barrier properties according to the present invention. The packaging 1 comprises a tubular body 2 forming a container, and the tubular body 2 is closed by a lid 3 that slides on the outer surface of the container 2. The container 2 and the lid 3 have moisture barrier properties in their respective walls. The lid 3 is overlapped on the container 2 over a part of the height of the tubular body 2 in order to obtain water vapor barrier properties for the packaging 1. The inner dimensions of the lid 3, such as the diameter of the lid 3, are larger than the outer dimensions of the container 2, such as the diameter of the container 2, so that a gap formed by a difference in dimensions, for example, the diameter, allows the lid to be opened and closed without adversely affecting the moisture barrier properties of the packaging. The packaging 1 may comprise an opening indication indicator 4 that proves that the packaging 1 has been opened for the first time. An example of the opening indication indicator 4 is a label that is adhesively bonded or welded between parts of the packaging 1 and is peeled off or peeled away when the packaging 1 is opened.

[0036] Figure 2 shows a cross-sectional view of one embodiment of the packaging 1 according to the present invention. The container 2 comprises a tubular wall 6 and an end wall or bottom 7. The tubular wall 6 has a geometric shape that is preferably cylindrical, although a number of other geometric shapes are envisaged within the scope of the present invention, such as a tubular body having an elliptical or rectangular cross-section or other cross-sections such as an oval. As will be explained in the remainder of the summary of the present invention, the end wall 7 is preferably fixed to the tubular wall 6 by welding or adhesive bonding. The lid 3 is similar to a container composed of a tubular wall 8 and an end wall or bottom 9 fixed to the tubular wall 8 by welding or adhesive bonding. The cross-sectional view of the packaging 1 shown in Figure 2 shows the sliding length 5 of the tubular wall 8 of the lid and the tubular wall 6 of the container. Figure 2 does not show the functional gap between the inner side of the wall 8 of the lid 3 and the outer side of the wall 6 of the container 2 that is required for the press-fitting of the lid and the sliding of the lid during the opening or closing of the packaging. A detailed view of the sliding zone 10 between the lid 3 and the container 2 is shown in Figures 3 to 5. Figure 2 shows an embodiment having an (optional) membrane seal 11 that is welded to the end of the wall 6 of the container 2 and can function as an opening indication indicator (instead of or in addition to the label 4 shown in Figure 1) and can also improve the water vapor impermeability of the packaging 1 before the packaging 1 is first opened.

[0037] According to a preferred embodiment of the present invention, the example of the packaging 1 shown in Figures 1 and 2 is based on cellulose having a cellulose content of more than 70%, preferably more than 85%, suitably more than 90%, and as a result, can be recycled in the paper industry.

[0038] The cellulose-based packaging 1 formed by the container 2 and the sliding lid 3 according to the present invention was compared with the packaging formed by the container 2 whose ends were sealed by welding on a moisture-sealing film seal. Surprisingly, despite the gap between the lid and the container that makes the packaging not airtight, it has been determined that such a packaging according to the present invention has equivalent or even improved water vapor barrier properties compared to a completely sealed packaging under certain conditions.

[0039] In particular, in order to achieve this improvement, it has been determined that the radial gap between the outer wall of the container 2 and the inner wall of the lid 3 must be between 0.02 mm and 0.5 mm, preferably between 0.05 mm and 0.25 mm.

[0040] Similarly, the ratio H / D, where H is the sliding length and D is the outer dimension of the container 2 (e.g., the outer diameter of the container 2), is greater than 1, preferably greater than 2. When the container 2 and the lid 3 have a cylindrical cross-section, the outer dimension of the container 2 and the inner dimension of the lid 3 correspond to the respective diameters of the container and the lid. When the container 2 and the lid 3 have a non-cylindrical cross-section (such as elliptical, oval, square, rectangular, or others), an "equivalent cylinder" whose perimeter is equal to the perimeter of the cross-section of the said container 2 and the said lid 3 (regardless of the shape) is defined for the container 2 and the lid 3, and the dimensions used are the (outer / inner) diameters of each such "equivalent cylinder" thus determined.

[0041] For example, in the case of a container having an outer diameter of 50 mm, the sliding length 5 is greater than 50 mm (ratio H / D = 1), preferably greater than 100 mm (ratio H / D = 2).

[0042] Figure 3 shows an example of the packaging 1 within the sliding zone 10. The container 2 comprises a wall 6 formed by at least one cellulose-based structural layer 6a and one thin functional layer 6b providing water vapor barrier properties. Similarly, the lid 3 comprises a wall 8 formed by at least one cellulose-based structural layer 8a and one thin functional layer 8b providing moisture barrier properties. The functional layers 6b and 8b are made of, for example, high-density polyethylene (HDPE) or polypropylene (PP) or other equivalent materials. The thicknesses of the functional layers 6b and 8b are small enough such that the cellulose mass fraction of the respective part (container 2 or lid 3) exceeds 70%.

[0043] In the embodiment of FIG. 3, the functional layer 8b forming the inner surface of the tubular body 8 of the lid 3 slides on the cellulose-based structural layer 6a forming the outer surface of the tubular body 6 of the container 2. The gap between the layer 8b of the lid and the layer 6a of the container is necessary for easy opening and closing of the container. The size of this gap and the size of the sliding length 5 formed by the overlap of the lid and the container affect the sealing of the packaging against water vapor. These sizes are, for example, as described above according to the determination of the present invention.

[0044] FIG. 4 shows another embodiment of the structure of the packaging in the sliding zone 10. In this embodiment, the functional layer 8b forming the inner surface of the tubular body 8 of the lid 3 slides on the functional layer 6b forming the outer surface of the tubular body 6 of the container 2. The gap between the layer 8b of the lid and the layer 6b of the container is necessary for easy opening and closing of the container. The size of this gap and the size of the sliding length 5 formed by the overlap of the lid and the container affect the sealing of the packaging against water vapor and are, for example, as described above according to the determination of the present invention.

[0045] FIG. 5 shows another embodiment of the structure of the packaging in the sliding zone 10. In this embodiment, the structural layer 6a of the container is confined between a first functional layer 6b forming the outer surface and a second functional layer 6c forming the inner surface of the tubular body of the container 2.

[0046] In the embodiment shown in FIG. 5, the functional layer 8b forming the inner surface of the tubular body 8 of the lid 3 slides on the functional layer 6b forming the outer surface of the tubular body 6 of the container 2. The gap between the layer 8b of the lid and the layer 6b of the container is necessary for easy opening and closing of the container 6. The size of this gap and the size of the sliding length 5 formed by the overlap of the lid and the container affect the sealing of the packaging against water vapor and are, for example, as described above according to the determination of the present invention.

[0047] Figure 6 shows a preferred embodiment of the tubular body 6 of the container 2 and the tubular body 8 of the lid 3. According to this preferred embodiment, the tubular body is made from a sheet, and the edges of the sheet are welded or adhesively bonded to form a joining zone 12. Preferably, the ends of the sheet are butt-welded via reinforcing strips as described in European Patent Application Publication No. 2007567, European Patent Application Publication No. 2004389, European Patent Application Publication No. 2004506, and European Patent Application Publication No. 26030052. Alternatively, the edges of the sheet are welded or adhesively bonded by overlapping the ends of the sheet.

[0048] Figures 7 to 9 show embodiments in which the bottom 7 or 9 is joined to the tubular body 6 or 8 to form the container 2 or the lid 3, and also show the continuity of the functional layers 6b / 8b / 7b / 9b in the joining zone to obtain good barrier properties of the final product.

[0049] Figure 7 shows the joining of the end wall 7 to the tubular body 6 for forming the container 2. In this example, the functional layer 7b of the end wall forming the outer surface of the container 2 is welded to the functional layer 6b of the tubular body forming the inner surface of the container 2. Figure 7 also shows the joining of the end wall 9 to the tubular body 8 for forming the lid 3. In this example, the functional layer 9b of the end wall forming the outer surface of the lid 3 is welded to the functional layer 8b of the tubular body forming the inner surface of the lid 3. Welding the respective functional layers 6b / 7b and 8b / 9b makes it possible to ensure the continuity of the said functional layers.

[0050] Figure 8 shows another embodiment in which the bottom 7 is joined to the tubular body 6 or 8 to form the container 2 or the lid 3. Figure 8 shows the continuity of the functional layers 6b / 7b and 8b / 9b in the joining zone where the end wall 7 and the tubular body 6 / 8 are joined to obtain good barrier properties of the final product. Figure 8 shows the joining of the bottom 7 to the tubular body 6 for forming the container 2. In this example, the functional layer 7b of the bottom forming the inner surface of the container 2 is welded to the functional layer 6b of the tubular body forming the outer surface of the container 2. Figure 8 shows the joining of the bottom 9 to the tubular body 8 for forming the lid 3. In this example, the functional layer 9b of the bottom forming the inner surface of the lid 3 is welded to the functional layer 8b of the tubular body forming the outer surface of the lid 3.

[0051] Figure 9 shows another embodiment in which the bottom is joined to the tubular body to form the container 2 or the lid 3. Figure 9 shows the continuity of the functional layers in the joining zone to obtain good barrier properties of the final product. Figure 9 shows the joining of the bottom 7 to the tubular body 6 for forming the container 2. In this example, the functional layer 7b of the bottom forming the inner surface of the container 2 is welded to the functional layer 6b of the tubular body forming the inner surface of the container 2. Figure 9 also shows the joining of the bottom 9 to the tubular body 8 for forming the lid 3. In this example, the functional layer 9b of the bottom forming the inner surface of the lid 3 is welded to the functional layer 8b of the tubular body forming the inner surface of the lid 3.

[0052] Figure 10 shows another embodiment of the packaging in the sliding zone 10. In this example, the lid 3 has a flared end 14 to make it easier to insert the lid 3 onto the container 2. In this example, the flared zone (where the gap between the inner wall of the lid and the outer wall of the container changes) should not be considered for the purpose of defining a sliding length 5 that ensures good water vapor barrier properties.

[0053] An alternative to the solution shown in Figure 10 to make it easier to insert the lid 3 is to narrow the end of the container 2 into which the lid 3 is press-fitted. In another embodiment, it is possible to both flare the lid 3 as shown in Figure 10 and narrow the end of the container 2.

[0054] Figure 11 shows the packaging according to the invention having air outlet or air inlet means 13 to facilitate the opening and closing of the packaging. Preferably, these means 13 are added to the lid 3. The means 13 is, for example, a valve that allows air to pass through when the pressure difference between the inside and outside of the packaging exceeds a threshold value. According to another example, the means 13 is an orifice closed by a label that can be repositioned by the user by opening and peeling it when the packaging is being opened and closed.

[0055] Figure 12 compares the water vapor barrier properties of embodiments of the packaging manufactured according to the invention. The barrier properties are determined by measuring the amount of water entering the packaging as a function of time when placed in an environment of 38 °C and 50% humidity. The barrier properties of five packages respectively designated as "Ech-1" to "Ech-5" are compared.

[0056] - The packaging designated as "Ech-1" is sealed by a welded film seal and is used as a reference.

[0057] - The packaging designated as "Ech-2" is sealed by a lid that overlaps the container over a sliding length 5 equal to 150 mm with a radial gap equal to 0.1 mm.

[0058] - The packaging designated as "Ech-3" is sealed by a lid that overlaps the container over a sliding length 5 equal to 100 mm with a radial gap equal to 0.1 mm.

[0059] - The packaging designated as "Ech-4" is sealed by a lid that overlaps the container over a sliding length 5 equal to 50 mm with a radial gap equal to 0.1 mm.

[0060] - The packaging designated as "Ech-5" is sealed by a lid that overlaps the container over a sliding length 5 equal to 10 mm with a radial gap equal to 0.1 mm.

[0061] In Figure 12, the packagings being compared all have a cylindrical container 2 with a diameter D equal to 50 mm and a height equal to 250 mm. These packagings are manufactured in a multilayer structure as shown in Figure 3. The cellulose-based structural layers of the container 2 and the lid 3, indicated as 6a and 8a respectively, have a mass of 265 g / m 2 and the polyethylene-based functional layers, indicated as 6b and 8b respectively, have a mass of 18 g / m 2 . The cellulose content in these packagings is 93.6%.

[0062] The packaging "Ech-1" used as a reference has a water vapor permeability of 0.129 g / (pack.day.bar).

[0063] The packaging "Ech-2" corresponding to an embodiment of the present invention has a water vapor permeability of 0.118 g / (pack.day.bar), which is 91% of the value of the sealed packaging indicated as "Ech-1".

[0064] The packaging "Ech-3" corresponding to an embodiment of the present invention has a water vapor permeability of 0.127 g / (pack.day.bar), which is 98% of the value of the sealed packaging indicated as "Ech-1".

[0065] The packaging "Ech-4" corresponding to an embodiment of the present invention has a water vapor permeability of 0.142 g / (pack.day.bar), which is 110% of the value of the sealed packaging indicated as "Ech-1".

[0066] The packaging "Ech-5" with its sliding length 5 being too small (10 mm) has a water vapor permeability of 0.222 g / (pack.day.bar), which is 172% of the value of the sealed packaging indicated as "Ech-1".

[0067] The exemplary embodiments are described to provide an overall understanding of the structure, function, manufacture, and principles of operation of the systems and methods disclosed herein. One or more examples of these embodiments are shown in the accompanying drawings. Those skilled in the art will understand that the systems and methods specifically described herein and shown in the accompanying drawings are non-limiting exemplary embodiments and that the scope of the present invention is not defined solely by the claims. Features illustrated or described in connection with one exemplary embodiment may be combined with features of other embodiments. Such modifications and variations are intended to be included within the scope of the present invention. Some problems with conventional methods and systems are described herein, and the methods and systems disclosed herein may address one or more of these problems. By describing these problems, no admission is intended as to the knowledge of those in the art regarding them. Those skilled in the art will understand that specific methods and systems are described herein with respect to several non-limiting embodiments, but that the scope of the present invention is not so limited. Further, although the present invention has been described in connection with several embodiments, many alternative, modifications, and variations will be apparent, or will be obvious, to those of ordinary skill in the applicable art. Accordingly, all such alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the present invention are intended to be included and addressed.

Claims

1. A packaging (1) comprising a first body forming a container (2) and a second body forming a lid (3), wherein the container (2) and the lid (3) have moisture barrier properties in their respective walls (6, 8), the lid (3) has an inner dimension larger than the outer dimension of the container (2), and in a process that defines the sliding length (5) when the packaging is being opened or closed, the lid (3) slides on at least a portion of the outer surface of the container, and the gap resulting from the difference in dimensions does not adversely affect the moisture barrier properties of the packaging (1), thereby enabling the opening and closing.

2. The packaging according to claim 1, wherein the gap is 0.02 mm to 0.5 mm.

3. The packaging according to claim 1, wherein the ratio H / D is greater than 1, H is the sliding length (5), and D is the outer dimension of the container (2).

4. The packaging according to claim 1, wherein the container (2) and the lid (3) each have a bottom (7, 9).

5. The packaging according to claim 1, wherein the container (2) and / or the lid (3) and / or the bottom (7, 9) comprises a structural layer (6a, 7a, 8a, 9a) and a functional layer (6b, 7b, 8b, 9b) that provide water vapor barrier properties.

6. The packaging according to claim 5, wherein the structural layer is based on cellulose having a cellulose content of more than 70%.

7. The packaging according to claim 5, wherein the functional layer is made of high-density polyethylene (HDPE) or polypropylene (PP).

8. The packaging according to claim 5, wherein the functional layer (8b) forming the inner surface of the lid (3) slides on the structural layer (6a) forming the outer surface of the container (2).

9. The packaging according to claim 5, wherein the functional layer (8b) forming the inner surface of the lid (3) slides on the functional layer (6b) forming the outer surface of the container (2).

10. The packaging according to claim 9, wherein the structural layer (6a) of the container (2) is confined between a first functional layer (6b) that forms the outer surface of the container (2) and a second functional layer (6c) that forms the inner surface of the container (2).

11. The packaging according to claim 1, wherein the lid (3) has a flared end (14) to facilitate insertion of the lid (3) onto the container (2), and / or the end of the container (2) onto which the lid (3) is pressed has a constricted portion.

12. The packaging according to claim 1, further comprising a tamper-evident system (4) for proving that the packaging (1) has been opened for the first time.

13. The packaging according to claim 1, further comprising a membrane seal (11) fixed to the end of the container (2).

14. The packaging according to claim 1, further comprising an air outlet or air inlet means (13) for facilitating the opening and closing of the packaging.

15. The packaging according to claim 1, wherein the packaging has a circular, elliptical, oblong, or rectangular cross-section.

16. The packaging according to claim 1, wherein the container (2) and / or the lid (3) are formed from tubular bodies (6, 8) made from a sheet, and the ends of the sheet are welded or adhesively bonded to form a bonding zone (12).

17. The packaging according to claim 16, wherein the ends of the sheet are butt-welded via a reinforcing strip, or the ends are welded or bonded together by overlapping them.

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