阅读说明：本技术 可再循环袋 (Recyclable bag ) 是由 J·克斯特斯 I·桑德尔 M·卢克塞斯 于 2019-07-15 设计创作，主要内容包括：本发明涉及一种薄膜袋,所述薄膜袋具有由袋薄膜制成的袋体(1),所述袋体具有至少两个彼此对置的前壁(2),其中,经印刷的材料区段(5)在环绕的边缘的一部分上被用永久的固定缝(6)固定在所述前壁(2)中的一个上并且邻近所述固定缝(6)地具有呈材料弱化部形式的撕开线(9)。根据本发明,所述固定缝(6)在所述环绕的边缘的40％和98％之间的份额上延伸。(The invention relates to a film bag having a bag body (1) made of a bag film, which has at least two front walls (2) lying opposite one another, wherein a printed material section (5) is fixed to one of the front walls (2) by a permanent fixing seam (6) over a part of the circumferential edge and has a tear line (9) in the form of a material weakening adjacent to the fixing seam (6). According to the invention, the fixing seam (6) extends over a portion of the circumferential edge of between 40% and 98%.)

1. Film bag having a bag body (1) made of a bag film, having at least two front walls (2) lying opposite one another, wherein a printed material section (5) is fixed to one of the front walls (2) with a permanent fixing seam (6) over a part of the encircling edge of the material section (5) and has a tear line (9) in the form of a material weakening adjacent to the fixing seam (6), characterized in that the fixing seam (6) extends over a portion of between 40% and 98% of the encircling edge.

2. Film bag according to claim 1, characterised in that the bag film can be heat sealed on the bag inside and on the bag outside and the fixing seam (6) is embodied as a heat seal seam.

3. Film bag according to claim 1 or 2, wherein the fixing seam (6) is formed by at most six fixing seam sections (6a, 6b), wherein the fixing seam sections (6a, 6b) are each formed continuously.

4. Film bag according to any of claims 1-3, characterised in that the tear-line (9) extends with a spacing of between 4mm and 20mm to the adjacent outer edge of the material section (5).

5. The film bag according to any of claims 1 to 4, characterized in that along the encircling edge the maximum unconnected length between the material section (5) and the associated front wall (2) is less than 160 mm.

6. The film bag of claim 5, wherein said maximum unattached length is between 40mm and 120 mm.

7. The film bag according to claim 5 or 6, wherein said maximum unattached length is provided in the area of an upper bag corner.

8. Film bag according to any one of claims 1-7, characterised in that the front wall (2) has a rectangular shape with two side edges, one upper edge and one lower edge, and that the material section (5) extends up to at least one of the edges.

9. Film bag according to claim 8, wherein the material section (5) extends up to the associated side, lower and upper edges of the front wall (2) and is fixed at each of the edges at least in sections by means of the fixing seam (6).

10. Film bag according to any one of claims 1-9, characterised in that the fixing seam (6) extends at least in sections coincident with a connecting seam (4) where the front walls (2) are connected either to each other or to a fold arranged between the front walls (2).

11. The film bag according to any of claims 1 to 10, characterized in that, starting from the rectangular shape of the material section (5), at least one corner is obliquely separated.

12. The film bag according to claim 11, characterized in that the bag body (1) has functional formations in the region of the separating corners in the form of a spout (11), a handle or a reclosable strip.

13. The film bag according to any of claims 1 to 12, wherein the two front walls (2) are each provided with an associated material section (5).

14. The film bag according to any of claims 1-13, wherein said bag film consists solely of polyolefin.

15. The film bag according to any of claims 1 to 14, characterized in that said bag body (1) is unprinted.

16. The film bag according to any of claims 1 to 15, wherein the material section (5) is composed of a material selected from the group consisting of: films, nonwovens, coated papers, and multilayer laminates.

17. Film bag according to any of claims 1-16, characterised in that the material section (5) and the bag film are composed exclusively of polyolefin, wherein the material section (5) is not printed in the region of the fixing seam (6).

18. Film bag according to any of claims 1-17, wherein the tear line (9) is formed by perforation, grooving and/or by means of a laser.

19. The film bag according to any of claims 1-18, wherein the bag film has a thickness between 80 μ ι η and 300 μ ι η.

20. The film bag according to any of claims 1 to 19, wherein the material section (5) has a thickness of 18g/m²And 150g/m²Weight per unit area in between.

Technical Field

The invention relates to a film bag having a bag body made of a bag film, which has at least two front walls lying opposite one another, wherein a printed material section is fixed to one of the front walls by means of a permanent fixing seam over a part of the circumferential edge of the material section and has a tear line in the form of a material weakening adjacent to the fixing seam.

Background

The film bag is in particular configured as a film packaging bag and can, for example, be provided with a standing bottom for accommodating liquids, such as detergents, cleansers, liquid soaps, shampoos, shower gels, hair conditioners or the like. In addition to different liquids, for example different household chemicals, other packaging purposes are also contemplated for which the film bags are used in a known manner.

Conventional film packaging bags are used in practice as mass-produced articles, wherein typical structures of such film packaging bags are known, for example, from EP 2032454B 1 and EP 2364848B 1.

The laminated composite material is usually provided as a material for bag walls as a bag film having an inner film made of Polyethylene (PE) and an outer film based on polyethylene terephthalate (PET) or biaxially oriented polypropylene (BO-PP), wherein the print layer is applied either to the outer film or to the inner film and is then visible through the transparent outer film before the inner film and the outer film are bonded on the inside at the contact surface in the case of such a laminated composite material.

Such conventional film packaging bags are characterized by a particularly high-quality appearance and good functional properties. However, due to the lamination of different polymer materials, recycling (recycling) of plastics of the same material is not possible, so that the corresponding film packaging bags as disposable articles are usually buried after their use, or at most burnt, wherein at least heat utilization can also be achieved.

In contrast, plastic waste of the same material can be easily recycled, wherein, however, the printing inks usually present on the bag walls, depending on the composition, may prevent the formation of high-quality recycled products.

Plastic waste of the same material and not printed is particularly advantageous in terms of recycling. In contrast, however, a high-quality appearance is required in film bags and in particular in film packaging bags, wherein, in addition to an attractive graphic configuration, product information and usage information must also be present on the film bag.

To meet these requirements, different and partly opposite methods are known from the prior art.

According to JPH 5-84640U, a film bag for refilling with liquid is proposed, which is provided with a surrounding, separate seal. The film bag is stabilized by a separate, relatively hard seal, wherein the user can also grip the film bag well on the seal.

Furthermore, multilayer film bags and film packagings are known, in which the individual layers are connected in a peelable manner, i.e. can be separated from one another. In this case, fixing seams are produced, the adhesion of which is set such that they are separated when a tensile force is exerted on the contact surfaces of successive layers. Different examples of such film bags and film packages are described for example in JPH8-2536A, US2018/0009587 a1, US3114643A and US 6280085B 1.

In contrast, EP3168169a1 (fig. 1) discloses a film bag of the same type. The printed material section extends only over the central region with respect to the height of the film bag and is fixed there to the front wall lying underneath at a permanent, i.e. non-peelable, fixing seam in the form of a heat sealing seam. Preferably, the two front walls lying opposite one another are each provided with a printed material section, wherein this configuration is also particularly preferred within the framework of the invention.

If known film bags of the same type are emptied, for optimum recycling, a large part of the printed material section can be torn off along a weakening line which extends at the longitudinal edge directly adjacent to the sealing seam. The narrow edges of the material sections remain only directly at the heat seal seams. If the material section is intentionally unprinted there, the remaining bag body after the material section is torn off is completely unprinted. In particular, simple recycling is possible in the case of a construction of the same material.

Disclosure of Invention

Against this background, the object of the invention is to improve the possibilities of use and configuration of film bags without impairing the possibilities of reuse.

The subject of the invention and the solution of this task are a film bag according to claim 1.

Starting from the same type of film bag, it is therefore provided that the fixing seam extends over a portion (length ratio) of between 40% and 98% of the circumferential edge. Starting from the rectangular shape of the material section, according to EP3168169a1, the fastening is intentionally carried out only on the narrow side of the seal, depending on the type of seal, whereas the fastening seam according to the invention extends over a portion of the edge between 40% and 98%, so that a better and more complete fastening of the material section is achieved overall on the associated front wall.

The invention is based in this case on the recognition that: the stability according to the embodiments known from the prior art is sufficient in itself, but there is a large unconnected length between the material section and the associated front wall over the entire width of the film bag on the longitudinal sides of the material section, depending on the type of seal.

It is in such a large unconnected length that there is a risk that: the material section can still be "hooked" in any way onto an obstacle during use of the film bag, for example during transport or handling by the user, so that the material section is torn off despite the fastening itself being sufficient.

Furthermore, according to the prior art, the material section can lift off far from the front wall lying below due to the large unconnected length. This applies, for example, to the following cases: the film bag has greater mobility after the partial removal of the filling and in particular the bag body is no longer filled to capacity. The resulting aesthetic impairment (with the greater risk of the aforementioned "snagging") is avoided in the framework of the invention by the greater proportion of the fixing seams along the circumferential edge.

The fixing seam preferably extends over at least 50% and particularly preferably over at least 60% of the circumferential edge.

Since the material section is arranged on the associated front wall with a permanent, i.e. non-peelable, fixing seam, the free position of the fixing seam must be left along the circumferential edge, so that the user can grip between the separate material section and the associated front wall there in order to then tear off the material section or the part of the material section within the tear line from the associated front wall. Accordingly, the fastening seam preferably extends over at most 90% and particularly preferably at most 85% of the circumferential edge.

The fastening seam and the tear line can each have a plurality of fastening seam sections or tear line sections spaced apart from one another along the circumferential edge. The portion of the fastening seam along the circumferential edge is then derived jointly from the portions of all fastening seam sections.

Where a fastening seam (or fastening seam section) is provided along the circumferential edge of the material section, the tear line or tear line section also extends adjacent to and offset inward, since otherwise the desired material separation when tearing off the material section cannot be ensured.

If the fastening seam is formed by a plurality of fastening seam sections, preferably up to six fastening seam sections, these fastening seam sections are particularly preferably each implemented continuously. Alternatively, however, the fastening seam sections can in principle each be embodied discontinuously (analogously to the perforations as material weakenings), wherein connected and disconnected regions alternate with a large frequency.

In the framework of the invention, the term "fastening seam section" always refers to a length along the circumferential edge over which a continuous tear is formed along the tear line when the material section is torn off from the associated front wall. If, in contrast, in the case of successive connected and disconnected sections, the tear reaches the outer edge of the material section when the material section tears, there is also a break in the fastening seam in the sense of the present invention. As long as the tear propagates along the fixing seam at the tear line upon tearing off, it is ultimately not important whether the fixing seam is implemented continuously or discontinuously, even though in practice a continuous configuration is preferred.

Even if different configurations are considered for the fastening seam, the fastening seam is preferably embodied as a heat-sealing seam. The bag film can then advantageously be heat-sealed on the inside of the bag and on the outside of the bag, wherein the front wall and the fold and/or the functional formation arranged between the front walls, such as a spout or a reclosable strip, can also be formed into a bag body by heat sealing.

In order that the material section can be torn off from the associated front wall as completely as possible after use of the film bag, the tear line extends according to a preferred embodiment of the invention at a distance of between 4mm and 20mm, preferably between 6mm and 12mm, from the respective adjacent outer edge of the material section. The distance is selected such that a connecting seam, in particular in the form of a heat-sealing seam, can be formed between the tear line and the respectively adjacent outer edge of the material section. The tear line may be formed, for example, by perforation, notching or by means of a laser. In the case of perforation, the detached area and the tab alternate along the tear line at a high frequency.

In the case of a notch, the material section has a smaller thickness at the tear line. This can be achieved, for example, by: where the material section is partially cut away in the thickness direction. Furthermore, the material displacement can also be carried out, for example, by embossing. In particular, the described measures can also be combined with perforation. Depending on the type of perforation, the weakened and weakened areas may alternate, for example, along the tear line. In addition, in order to achieve particularly easy tearing, the weakened regions and the completely detached regions according to the perforation pattern can alternate.

Furthermore, the tear line can also be formed by means of a laser. By irradiation with laser light, material removal and/or embrittlement is then achieved. When using a laser, the material section can also have an absorbent additive, so that the tear line can be formed particularly effectively without material damage of possible further layers. The embrittlement can in principle also be achieved by temperature increase. The tear line can also be formed directly by the temperature increase and/or the displacement of material during the heat sealing.

As described above, within the framework of the invention, in particular an accidental tearing off of the material section and a far lifting of the material section from the associated front wall are to be avoided. It is accordingly advantageous if the maximum unconnected length between the material section and the associated front wall along the circumferential edge is kept small and preferably less than 160 mm. Particularly preferably, the maximum unconnected length is between 40mm and 120 mm.

With regard to the lower limit, it is noted that in at least one position of the material section the user should have the following possibilities: the material section is gripped between the associated front wall, so that the unattached part of the material section can be pulled off therefrom by a tearing movement.

The maximum unattached length is preferably located in the upper region of the film bag, particularly preferably in the region of the upper bag corner. By this arrangement, the risk of an accidental tear (hooked) is reduced, wherein the user finds the point of action for tearing off a material section right in the upper region of the bag and in particular at the bag corner.

In a conventional embodiment, the front wall has a generally rectangular shape with two side edges, an upper edge and a lower edge. It is when the film bag is provided for containing liquid that the upper corners of the front wall can be cut off obliquely, as is known for example from EP3168169a1 and US2018/0009587 a 1. Within the framework of the invention, such a front wall is then still considered to be substantially rectangular.

In principle, the material sections can be arranged in different ways on the associated front wall. In particular, it is not excluded that the material section is arranged at a distance from the edge of the associated front wall. However, according to a preferred embodiment of the invention, the material section extends up to at least one of the edges of the associated front wall.

In particular, the material sections preferably extend as far as the side, lower and upper edges of the associated front wall, wherein the material sections are then also fixed at each of the edges at least in sections by means of fixing seams.

With regard to the rectangular or substantially rectangular configuration of the front wall, the material section then remains at all edges and is therefore well protected against accidental tearing. Furthermore, the front wall is covered to a large extent, almost completely or even completely by material sections, so that a particularly high-quality appearance is obtained for the user, similar to that of conventional film bags, which cannot be recycled (recycled) in the same way.

When the material section extends up to at least one edge and preferably all edges of the front walls, the fixing seam usually also coincides at least in sections with a connecting seam, where the front walls are connected either to each other or to a fold arranged between the front walls. It is precisely when the film bag is provided for containing a liquid that a bottom fold can be provided between the front walls, which bottom fold also constitutes a standing bottom.

The material section may also have a rectangular or substantially rectangular shape. Particularly preferred is a configuration in which, starting from a rectangular shape, at least one corner is obliquely cut off. It is also expedient if the material section is set back at the obliquely detached corner relative to the front wall lying below. At such a region retracted back, the fixing seam can be interrupted, for example, along the unattached length, so that the user can act there in order to tear off the material section.

The retracted arrangement of the material sections is also advantageous if a functional molding is provided in the lower region of the bag body. In particular, pour spouts, handles or reclosable strips can be considered as functional profiles.

The spout and the reclosable strip are supplied as separate components, while the handle can be configured in different ways. In addition to the fastening of the separately supplied handle ring, the handle can be formed in a particularly preferred manner simply by punching or cutting. Such a perforation or cut is then advantageously formed in the region which is separated from the actual receiving space of the bag body by a seal. Reference is made in this connection, for example, to EP3168169a 1.

In the frame according to the invention, it is sufficient that only one of the two front walls is provided with a material section in the manner described, wherein in a frame of this configuration the material use is minimized and only the printed material section has to be removed. The disadvantages of the printed material during recycling are already mentioned at the outset in the discussion of the known embodiments.

According to a preferred development of the invention, however, the two front walls are each provided with an associated material section, which can be embodied identically or differently, without limitation, with regard to the aforementioned features.

This situation takes into account the following requirements: the film bag should generally be configured differently on its front side and its rear side. On the front side of the product, attractive designs, logos and easy-to-read labels may be provided, while on the rear side detailed information about ingredients, applications, other properties, warnings and the like may be implemented.

To achieve particularly good recycling, the bag film can be composed purely of polyolefin. Recycling or mixtures containing recycling are also contemplated for all components of the film bag and in particular the bag film and material sections.

Advantageously, the pouch itself is also unprinted.

In this context, it is also advantageous if the material section is not printed in the region of the fixing seam and in particular outside the tear line, even though printing is not ruled out there in principle. It is also achieved that residues remaining on the pouch body after tearing through the material section leave no printing ink if the material section is not printed outside the tear line. In this case, it can be particularly preferably provided that the material sections and the bag film are composed exclusively of polyolefin, wherein, when the material sections are separated from the bag body in their printed regions, then there is always pure, unprinted residual material.

According to a preferred embodiment of the invention, the material section is formed by a film. Alternatively, however, other materials such as nonwovens, coated papers and multilayer laminates are also conceivable in principle.

The fastening seam provided on the circumferential edge or the fastening seam section forming the fastening seam is usually provided as the only connection between the material section and the front wall located below.

Even though the material section may contribute in a certain way to the stability of the bag body, the material section preferably has a significantly lower thickness and a significantly lower weight per unit area than the bag film.

Within the framework of this embodiment, it is also conceivable that the material section can also be recycled, that the resulting recyclables are of low quality due to residues of printing ink, and that the possibilities of use of the recyclables are limited.

The weight per unit area of the material section is typically 18g/m²And 150g/m²In the meantime. In a preferred embodiment of the material section as a film and in the case of conventional plastics, this weight per unit area corresponds approximately to a thickness of between 20 μm and 170 μm.

The pouch film preferably has a thickness of between 80 μm and 300 μm, particularly preferably between 100 μm and 250 μm.

The choice of a suitable thickness of the bag film here also depends to a large extent on the size of the film bag, the purpose of use and the load to be expected here. As the size of the film bags increases, the greater thickness of the film bags and, if necessary, of the material sections can also be taken into account in problematic cases.

If the material section is designed as a film, the material section particularly preferably has at most half the thickness of the bag film.

The film bag according to the invention can be provided with a longitudinal direction and a transverse direction. In the case of a substantially rectangular front wall, the longitudinal direction then corresponds to the extension of the side edges of the front wall, wherein the upper and lower edges extend in the transverse direction.

Starting from this arrangement in the longitudinal direction and in the transverse direction, the material section is preferably provided continuously along its two side edges extending in the longitudinal direction with a fixing seam which also extends at least partially at the upper edge and at the lower edge. At the lower edge, a continuous extension can be realized here. However, it is sufficient to fasten only individual partial regions at the lower edge, which then each form a relatively short fastening seam section.

As described above, it is essential to the invention that the material section is permanently fixed to the associated front wall by means of a fixing seam, so that upon tearing off the material section at the tear line, material separation is achieved and thus a residual portion of the material section remains on the front wall. In this case, it is particularly possible and in many cases preferred for the fixing seam to be the only connection between the material section and the associated front wall.

According to an alternative embodiment, further connecting points are provided on the surface of the material section, for example, so that the material section cannot be lifted too far from the associated front wall, which could impair the appearance.

The additional connection points or connection locations can be constructed in different ways and methods. While a permanent fixing seam is present along the circumferential edge of the material section, a releasable fixing can also be provided at optionally provided additional connecting points or connecting points. A peelable heat seal can be achieved, for example, by precisely selecting the heat seal parameters, by only slightly fixing and/or by providing a lacquer which reduces the heat seal stability, wherein these variants are merely exemplary. Permanent or peelable attachment may also be achieved by adhesives.

If at least one additional connection is produced in the frame of the variant by means of an adhesive or heat sealing in the plane of the material section, this connection is advantageously also surrounded by a material weakening corresponding to the weakening line along the fixing seam. When the material section is then torn off, in addition to the marginal, edge-side remnants of the material section at the fixing seams, individual "islands" remain in the plane of the material section, which islands then according to a preferred embodiment of the invention are unprinted, so that the remaining pockets with remnants of the material section are then ideally also completely free of printing ink.

Drawings

The present invention will be described below with reference to the accompanying drawings. In the figure:

figure 1 shows a perspective filled film bag,

figure 2 shows an alternative configuration of the film bag in a laid-flat, unfilled state,

figure 3 shows a cross section of the film bag according to figure 1 or 2 in the region of the longitudinal sides,

fig. 4 shows the film bag emptied and laid flat during the separation of the material sections.

Detailed Description

Fig. 1 and 2 show alternative configurations of the blister pack. As a difference, a slightly different shape and the following are derived: the film bag according to fig. 2 is flat, unfilled, unsealed and provided with no additional functional elements.

However, fig. 1 and 2 may be considered in their entirety with respect to the remaining structure.

Accordingly, it can be seen that the film bag has a bag body 1 with two front walls 2 opposite one another and a bottom fold 3 arranged between the front walls. The front walls 2 are connected to each other and to the bottom fold 3 by means of connecting seams 4.

Furthermore, it can be seen that a separate printed material section 5 is arranged on the front wall 2 in the figure. As can also be seen in fig. 3, the material section 5 is fastened to the associated front wall 2 at a fastening seam 6, which coincides with the lower connecting seam 4.

The connecting seam 4 and the fixing seam 6 are formed by heat sealing.

Although the material section 5 is provided with the print 7 in the middle area, the edges of the material section 5 and the entire bag body 1 are unprinted.

In the exemplary embodiment according to fig. 1, the fastening seam 6 has a total of five fastening seam sections 6a, 6b around the circumferential edge of the material section 5, which are separated from one another by an unattached region 8. Furthermore, it can be seen in fig. 1 that, starting from the substantially rectangular shape of the material section 5, the upper corners are separated obliquely (in this embodiment by an angle of approximately 45 °).

The two unattached regions 8, which have the greatest unattached length, are located in the region of the upper bag corner, where the user can easily grip between the material section 5 and the front wall 2 located below. To remove the film pouch, the user can then tear off a large portion of the section of material 5 from the pouch body 1. For this purpose, it is provided according to the invention that the fixing seam 6 is permanent, that is to say is non-peelable, wherein a tear line 9 in the form of a material weakening extends along the fixing seam 6, that is to say generally parallel to the fixing seam 6.

The material weakening can be constructed in different ways. It is possible, for example, to perforate and/or to reduce the thickness and/or embrittlement of the material (for example by irradiation with a laser or the application of heat).

For better identifiability, the tear line 9 in fig. 3 is shown with a reduced thickness of the material section 5. The tear-off line 9 can also be formed in other ways, for example by means of a laser and/or a heat input. Particularly simple process management is achieved if the heat input is carried out in a suitable manner during the heat sealing.

Thus, if the user grasps and pulls the material section 5 for removal after use of the film bag between the material section 5 and the associated front wall 2 at the upper bag corner, a material separation in the material section 5 takes place at the tear line 9, so that a residual part of the outer part of the material section 5 remains on the front wall 2 lying below at the fastening seam 6 as far as the tear line 9, while the entire inner region of the material section 5 is torn off together with the printed matter.

Since the print 7 ends before the tear line 9, the pouch 1 remains completely free of printing ink.

The fixing seam 6 extends over a portion of the continuous edge of between 40% and 98%, wherein the portion is preferably greater than 50% and particularly preferably greater than 60%, and preferably less than 90% and particularly preferably less than 85%.

At the lower edge of the front wall 2, there can in principle be a continuous fixing seam 6 or a continuous fixing section. In the illustrated embodiment, however, only two short fastening seam sections 6a are provided as a kind of fastening, while the fastening seams 6 extend with corresponding fastening sections 6b over the entire length of the material section 5 in the longitudinal direction of the bag up to the obliquely separated corners.

Fig. 3 shows that, according to a preferred embodiment of the invention, associated material sections 5 are arranged on each of the two front walls 2, wherein the material sections 5 can be implemented largely identically or also differently.

As can also be seen from fig. 3, the material section 5 is not connected outside the fastening seam 6 to the respectively associated front wall 2.

According to the shown embodiment, the film bag is provided for containing liquids such as detergents, shampoos, conditioners, cleansers or other household chemicals, wherein the purpose of this use is merely exemplary. The configuration according to the invention is also suitable for other film bags and in particular film packaging bags in general.

The tear line 9 advantageously extends at a small distance from the fastening seam 6, so that the distance of the tear line 9 from the respectively adjacent outer edge of the material section 5 can be, for example, between 4mm and 20mm, in particular between 6mm and 12 mm.

The exemplary embodiments shown in fig. 1 and 2 each have a handle opening 10, which is formed by punching in the sealing region of the bag body 1. According to fig. 2, the material section 5 also extends at the handle opening 10 and is also punched there, however the corner region according to fig. 1 is omitted.

Fig. 1 also shows, by way of example, that the bag body has a spout 11, wherein alternative functional forms, for example reclosable forms, can also be provided.

As mentioned above, the remaining part of the pouch 1 and the material section 5 remaining according to fig. 4 is not printed at all. It is also possible here for the material section 5 and the front wall 2 of the bag and the functional elements, such as the spout 11, to be composed exclusively of polyolefins, such as polyethylene or polypropylene, so that particularly effective recycling can be achieved.

The bag film constituting the front wall 2 and preferably also the bottom fold 3 typically has a thickness between 120 μm and 250 μm.

If the material section 5 is made of a thin film according to a preferred embodiment of the invention, the thickness is for example between 20 μm and 170 μm.