Packaging bags and use of packaging bags

Abstract

To provide a manufactured bag having high dimensional stability by producing a high proportion of paper. The present invention relates to a packaging bag comprising a web, at least a portion of which is made of paper, having a front wall (1), a rear wall (2) that projects beyond the front wall (1) above an open upper bag edge, and a stacking opening (4) located in the section of the rear wall (2) that projects beyond the front wall (1). The front wall (1) and the rear wall (2) have beveled corners (7) at a bottom edge (6) of the bag opposite the upper bag edge.

Description

[Technical field]

[0001] The present invention relates to a packaging bag comprising a web having a front wall and a rear wall projecting beyond the front wall at an open upper edge of the bag, a stacking opening being located at the portion of the rear wall that projects beyond the front wall, the web being at least partially formed of paper. [Background technology]

[0002] The above-mentioned type of packaging bag is also commonly called a "wicket bag", and such a packaging bag allows a plurality of packaging bags to be connected in a stack through a stacking opening, and an individual packaging bag can be removed from the stack for filling. Such packaging bags are commonly used as packaging for hygiene products, such as diapers or other hygiene products. When diapers are packaged, they are pressed before being inserted into the film bag, so that the diapers expand in the packaging bag and then lie snugly inside the bag, forming the packaging bag into a package with a substantially rectangular shape.

[0003] Such packaging bags are basically known from the prior art and are described, for example, in DE 10 200 43 331 and DE 10 200 43 35. According to such an embodiment, the filling takes place by opening the edge of the bag, which edge is also provided with a stacking opening in the rear wall. After the bag has been filled, it is sealed. The part with the stacking opening can then be separated and discarded.

[0004] Such packaging bags are typically made of a heat sealable material, particularly a thermoplastic film such as a polyethylene film, having a thickness of 40 microns (micrometers) to 80 microns, depending on the size of the bag.

[0005] However, the packaging industry is increasingly striving to use packaging materials that are based on renewable raw materials and that are easily recyclable, and as a result, paper is increasingly being used as a material for such sacks, since the fibres required for the production of paper are based on renewable raw materials.

[0006] US Patent No. 5,399,633 teaches a packaging bag of the above type, which is formed from at least a paper layer and a sealing layer of polyethylene disposed thereon. A three-layer structure is also preferred, with an outer layer formed from paper and an inner layer formed from polyethylene, and the inner paper layer is provided with a recess in the area of ​​the heat-sealed seam to allow the heat-sealed seam to be formed through the sealing layer.

[0007] When incorporating a paper layer to increase recyclability, the special feature arises that the recyclability improves considerably as the paper proportion increases, since the residual polyethylene can be recycled together with the paper layer. Overall, a paper proportion of at least 80% by weight is aimed for here, whereby the packaging bag is designed to be relatively stiff due to the high paper proportion. However, since the corners of such packaging bags are usually folded at the bottom, a high paper proportion leads to high recovery forces and impairs the dimensional stability of the package. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] German Patent Application Publication No. 1291280 [Patent Document 2] German Patent No. 2312143 [Patent Document 3] European Patent Application Publication No. 3687914 Summary of the Invention [Problem to be solved by the invention]

[0009] Against this background, the invention is based on the object of providing a packaging bag which on the one hand can be produced with a high proportion of paper and at the same time has high dimensional stability. [Means for solving the problem]

[0010] The object and the solution of the problem of the present invention are the packaging bag according to claim 1 and the use of the packaging bag according to the invention according to claim 14.

[0011] It is therefore important to the present invention that the front and rear walls have beveled corners at the lower bag edge facing the upper bag edge, so that in the unfilled state of the packaging bag, the lower end of the packaging bag is substantially trapezoidal in shape, and the beveled corners are exposed after filling to form two triangular portions of the stand-up bottom.

[0012] The beveled corners ensure that no excess material is placed on the stand-up bottom in the filled state, which considerably improves on the one hand the dimensional stability of the packaging bag and on the other hand the functionality of the stand-up bottom.

[0013] Such an embodiment is particularly advantageous if the front and rear walls are connected to one another at the bottom edge of the bag via a bottom gusset. According to such an embodiment, the packaging bag may be formed by folding back only one web. For this purpose, a bottom gusset is first introduced into the web and then the front wall is joined to the rear wall. Due to the presence of the bottom gusset, the front and rear walls are joined seamlessly at the bottom edge of the bag, and the joining strength of the front and rear walls is particularly high. The combination of the bottom gusset and the integration of the chamfered corners creates a bottom that is on the one hand dimensionally stable and at the same time stable against the loads generated by the packaged goods. At the bottom of the bag, the front and rear walls then merge into the bottom gusset via a fold line. In addition, a transverse seam can also be provided at the fold line in order to reinforce the bottom of the bag.

[0014] Instead of forming the bottom folds integrally with the front and rear walls, a separate bottom plate may be provided, which is joined to the front and rear walls by a joint seam, in particular a heat sealed seam, and areas of the bottom plate then form areas of the front and rear walls at the joints.

[0015] Although the embodiment having a bottom gusset is a preferred embodiment of the invention, the invention is not limited thereto, and it is, of course, within the scope of the invention for the front and back walls to be joined together at the bottom edge by a seam.

[0016] In a further embodiment, at least one of the front and rear walls is connected to the bottom gusset via a number of secondary transverse seams extending laterally, which are spaced apart from the lower bag end or transverse seam so that a compensation chamber is formed therein. The secondary transverse seams have a number of penetrations through which air is transported to the outside of the bag edge. This greatly simplifies the packaging process, since there is usually enough space at the edge. This helps to avoid excessive pressure in the center of the bottom, which can cause the seam or the creased edge to burst. However, pressure extremes can also occur on the outside, in which case the air flows in the opposite direction to the center, relieving the corners of the bottom.

[0017] According to a preferred embodiment, the proportion of paper is at least 90% by weight, preferably at least 95% by weight. By incorporating such a high proportion of paper, the recyclability can be substantially improved, whereby the special design of the packaging bag is of course also particularly effective, since the stiffness of the front and rear walls also increases as the proportion of paper increases.

[0018] According to a particularly preferred embodiment of the invention, the web comprises a paper layer, which is at least partially covered on the side adjacent to the packaging space with a sealing layer of heat-sealable material. Correspondingly, the front and rear walls have a corresponding coating on the inside. In principle, multi-layer designs with several paper layers are also conceivable, but the preferred designs are limited to the combination of only one paper layer with a sealing layer of heat-sealable material arranged thereon.

[0019] A heat-sealable material is a thermoplastic material that melts under the influence of heat and hardens when cooled, making it possible to join the front and rear walls by heat sealing, which would not be possible without a corresponding coating.

[0020] The sealing layer may be applied in the form of a single or multi-layer extrusion lamination (extrusion coating), where the individual layers may use different polymers, for example a three-layer PE / EVOH / PE (polyethylene, ethylene vinyl alcohol copolymer, polyethylene) structure.

[0021] Alternatively, the sealing layer may also be applied as a dispersion coating of a heat-sealable lacquer, in particular by means of a printing process. In the context of the present invention, lacquer is understood to mean a liquid coating material which is preferably applied in a thin layer and which forms a continuous solid film by chemical or physical processes.

[0022] In principle, it is sufficient within the scope of the invention if at least one of the front and / or rear walls is provided with only a partial or non-full sealing layer, after which the heat-sealable material is applied only if the formation of a corresponding heat-sealed seam is required.

[0023] Alternatively, it is also conceivable that the sealing layer completely covers the paper layer on the side adjacent to the packaging space. Such an embodiment has the advantage that no particular precision is required for the positioning of the heat-sealed seam. Even with slight misalignments, the heat-sealed seam is formed securely. On the other hand, by bonding a complete layer of heat-sealable material, the water vapor barrier is also considerably improved. This is particularly advantageous when the packaging is used for packaging diapers, since diapers have highly absorbent materials to be able to absorb body fluids. If the packaging bag only has a low water vapor barrier, the result is that the highly absorbent materials absorb the moisture in the air as the storage time increases. This then leads to increased storage conditions and therefore to a need for rapid sale and rapid consumption. A gas, fragrance or odor barrier can additionally be incorporated on top of this. This is necessary, for example, if the diaper is to be perfumed or saturated with lotion. The corresponding barrier layer is in particular formed from EVOH (ethylene vinyl alcohol copolymer).

[0024] However, a full surface seal layer also presents the problem that a substantially higher percentage of the polymer portion must be provided on the paper layer than would be the case with only a partial coating, and therefore the seal layer must be much thinner than would be the case with only a partial coating.

[0025] In order to allow heat-sealed seams that can withstand adhesion despite the thin coating, these seams are preferably made wider than in the case of thicker coatings, thereby increasing the adhesion area. Alternatively, it is also possible to combine both forms. In this case, a full-surface sealing layer and an additional layer of heat-sealable material are applied to the paper layer. Such an embodiment serves mainly to increase the water vapor barrier properties. In the areas where the formation of heat-sealed seams is envisaged, the additional layer thickens the layer of heat-sealable material and increases the adhesive strength. Furthermore, it is also conceivable to provide the additional layer in particularly stressed areas, for example at corners. The width of the heat-sealable seam, regardless of its location, is between 2 mm and 10 mm, in particular between 4 mm and 6 mm.

[0026] The heat sealable material for the sealing layer can be applied by extrusion lamination, and the heat sealable material for the additional layer can be applied by extrusion lamination or dispersion coating. The latter variant (dispersion coating) is particularly advantageous in keeping the percentage of foreign matter low, since the dispersion can be applied very thin, especially with a basis weight of 1 gsm (grams per square meter) to 3 gsm. In addition, typical barrier materials can also be used in such embodiments. And the barrier layer can be formed of one or more materials from the group consisting of acrylic polymers, acrylic copolymers, polyvinyl acetate, polyvinyl alcohol, ethylene vinyl acetate, polyvinyl chloride, styrene butadiene copolymers, polyvinylidene chloride, polyacrylonitrile, polyacrylic esters, natural waxes, synthetic waxes, starch, chalk, and talc.

[0027] Based on such an embodiment, the invention preferably provides that the front and rear walls are connected to each other at their transverse edges via a longitudinal sealing seam. Thus, first the web is folded back to form the bottom gusset, and then the front and rear walls, respectively, can be joined to each other at their transverse edges by a longitudinal sealing seam. A heat-sealable coating must then be pre-applied to these areas.

[0028] It is also preferably provided that in the bottom region, a number of bottom gusset sections separated from one another by bottom gussets are connected at the corners to the adjacent front wall or to the adjacent rear wall via an inclined sealing seam. Starting from an unfilled flat packaging bag, the heat sealing seam thus extends along the lateral edges and in the region of the oblique corners, but only at the bottom edge, since the bottom gussets are provided, and only at the top edge, since the bag opening is provided.

[0029] The beveled corners preferably have an angle of 40° to 50°, particularly preferably 45°, so that the longitudinal joint and the adjacent beveled joint accordingly enclose an angle of 130° to 140°, preferably 135°.

[0030] In principle, any material can be used as heat sealable material for the coating. Mainly polyolefins are used, preferably polyethylene or polyethylene copolymers such as HDPE (high density polyethylene), LLDPE (linear polyethylene), LDPE (low density polyethylene) or EVA (ethylene vinyl acetate) or mixtures thereof.

[0031] The paper used is also basically not particularly limited. Kraft paper is preferred. Kraft paper is understood to be a wrapping paper made from bleached or unbleached sulfate pulp and having high static and dynamic strength.

[0032] According to a preferred embodiment, the paper layer has a basis weight between 60 gsm and 120 gsm, preferably between 70 gsm and 90 gsm. The basis weight of the heat sealable material is preferably between 1 gsm and 16 gsm, preferably between 3 gsm and 10 gsm. If a full-surface coating is applied, the basis weight of the heat sealable material is between 2 gsm and 8 gsm, preferably between 3 gsm and 7 gsm. In the case of a full-surface coating, if thicker portions of the coating are applied to form heat sealable seams, the weight per unit area is preferably between 8 gsm and 16 gsm, more preferably between 10 gsm and 14 gsm. This also applies to non-full-surface coatings.

[0033] In a preferred embodiment, the packaging bag has ventilation openings. These ventilation openings are particularly advantageous since the goods to be packaged, in particular diapers, are placed in the packaging bag in a tight fit, so that the air initially contained in the packaging bag must escape. On the one hand, this allows for quick filling and, on the other hand, avoids excessive pressure on the heat-sealed seams due to an internal pressure build-up caused by compressed air.

[0034] Preferably, these vents are formed by unsealed parts of the heat-sealed seams. In particular, the vents are arranged in the diagonal seal seams. Each diagonal seal seam thus has one or more unsealed parts through which air can escape from the packaging bag. Such an embodiment is particularly advantageous since it is not necessary to have a breakthrough in the material of the web. This is advantageous since paper is generally very susceptible to tearing if there is already a weakness in the material of the web. By providing the inclusions and connections in the heat-sealed seams, the vents can be formed without weakening the material of the front or rear wall. In addition, the opening closes as soon as the bag is held, essentially in the shape of a cube.

[0035] The web thus has a heat-sealable area not only on the inner side but also on the outer side. In contrast to the inner side, however, this area is not arranged over the entire surface of the outer side and serves in particular to form a flat head area. During sealing, the front wall is usually joined by a transverse sealing seam and must be correspondingly creased in order to form a cubic shape in which the front wall and part of the rear wall are folded on themselves. The outer heat-sealable area can also be applied by dispersion lamination with a heat-sealable lacquer.

[0036] The area having the heat sealable material is placed over itself and then sealed together by the application of heat. The sealed area provides adhesive strength and dimensional stability to the top of the packaging bag when filled.

[0037] The packaging bag according to the invention preferably has a width between 150 and 500 mm and a length between 200 and 700 mm.

[0038] In accordance with another independent aspect, instead of beveling the corners, the bottom gusset sections may be secured together at their side edges. For example, the bottom gusset sections may be formed with at least a partial coating of a heat sealable material such that they can be joined together by heat sealable seams.

[0039] Alternatively, one or more openings may be located in the bottom gusset. In this case, the front and back walls may be joined through the bottom gusset. The bottom is then secured together. There is no need to coat the bottom gusset with a heat sealable material.

[0040] In addition, substantially all of the features described above may be associated with such an embodiment.

[0041] A further object of the present invention is to use the packaging bag according to any one of claims 1 to 13 for packaging diapers. Typically, for this purpose, a number of paper diapers are placed one on top of the other in a folded state and inserted together into a film packaging.

[0042] In a further step, the packaging bag is then sealed in the head region with a transverse sealing seam.According to the above explanation, the areas with the heat sealing lacquer can then also be positioned and sealed to one another.

[0043] Since the rear wall projection is intended only for fastening the unfilled packaging bag, it is usually cut off from the packaging bag after the transverse sealing seam has been inserted, since it has no further use.

[0044] In a particularly preferred embodiment of the present invention, the packaging bag containing the diapers has a substantially cubic shape after closing. Effect of the Invention

[0045] The invention will now be explained in more detail with reference to example embodiments shown in the following figures. [Brief description of the drawings]

[0046] [Figure 1A] FIG. 1A shows a packaging bag according to the present invention in an unfilled state. [Figure 1B] FIG. 1B shows a packaging bag according to the present invention in an unfilled state. [Figure 2A] FIG. 2A shows the essential steps for the manufacture of a packaging bag according to FIG. [Figure 2B] FIG. 2B shows the essential steps for the manufacture of the packaging bag according to FIG. [Figure 2C] FIG. 2C shows the essential steps for the manufacture of the packaging bag according to FIG. [Figure 3A] FIG. 3A is a cross-sectional view through a packaging bag according to the invention in the region of the longitudinal seam. [Figure 3B] FIG. 3B is a cross-sectional view of a packaging bag according to the invention in the region of the longitudinal seam. [Figure 4] FIG. 4 shows a packaging bag according to the invention in a filled state with a stand-up pouch bottom. [Diagram 5] FIG. 5 is a diagram of an alternative design of the packaging bag. [Figure 6] FIG. 6 is a diagram of an alternative design of the packaging bag. [Figure 7A] FIG. 7A shows a bottom design with a separate bottom plate. [Figure 7B] FIG. 7B shows a bottom design with a separate bottom plate. [Figure 8] FIG. 8 shows yet another design for the bottom portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0047] 1A and 1B show a packaging bag according to the invention lying flat and empty, having a front wall 1 and a rear wall 2. The rear wall 2 projects towards the front wall 1 with a portion 3 facing the front wall 1. A stacking opening 4 is also arranged in the packaging bag at the projecting portion 3.

[0048] In order to greatly simplify the packaging process, stacking openings 4 are provided so that a number of packaging bags can be stacked one on top of the other and grasped with a stick or the like.

[0049] The front wall 1 and the rear wall 2 are connected to each other at their transverse edges by a longitudinal sealing seam 5, which merges into an inclined sealing seam 7 at the bottom edge 6 of the bag. A special feature here is that the inclined seam 7 does not connect the front wall 1 and the rear wall 2. Rather, a bottom gusset 8 is provided having a bottom gusset section 9 and a bottom gusset section 10, which is connected to the front wall 1 via the inclined sealing seam 7 and which is connected to the rear wall 2, which is not shown in more detail in Figures 1A and 1B. In contrast to Figure 1A, Figure 1B shows an embodiment in which the front wall 1 and the rear wall 2 are connected not only by the inclined seam 7 but also by a transverse seam 19 to the bottom gusset section 10.

[0050] The beveled seam 7 allows the packaging bag to be made with a beveled corner 11 (beveled corner) at the bottom edge 6 of the bag, the special features of which will become apparent from the following figures.

[0051] 1A and 1B it is further possible to identify areas 12 with a heat sealing lacquer applied to the outer surface of the front wall 1 and to the outer surface of the rear wall 2. Furthermore, ventilation openings 13 are provided, which are arranged at the oblique sealing seam 7 according to FIG. 1A and at the transverse seam 19 according to FIG. 1B.

[0052] 2A, 2B and 2C show the manufacturing process for producing the packaging bag of FIG. 1A. For this purpose, an endless web 14 is provided which extends in the machine direction MD and already has a front wall 1, a rear wall 2 and a bottom gusset section 9 forming a bottom gusset 8, a bottom gusset section 10. Furthermore, a stacking opening 4 is already arranged in the web 14. FIGS. 2A, 2B and 2C illustrate the conveying and production of packaging bags in the machine direction MD. In FIG. 2B, the web 14 is folded back, whereby the bottom gusset 8 is produced. Furthermore, the area 12 with the heat sealing lacquer is now shown at least on the front wall 1. Next, in FIG. 2C, the longitudinal seams 5 and the diagonal seams 7 are heat sealed, after which the individual packaging bags are separated from the web 14. In a final step, the corners of the bottom edge 6 of the bags can be beveled.

[0053] The packaging bag according to the invention is a packaging bag which is at least partially made from paper. In particular, the aim is to produce a packaging bag which is formed from at least 80% by weight, particularly preferably 90% by weight, very particularly preferably 95% by weight, of paper. Paper is a renewable raw material. In addition, a good recyclability can be ensured by a proportion of paper which is as high as possible. Figures 3A, 3B show a cross-section of the packaging bag in the region of the longitudinal seam 5, however, in these figures a more detailed representation of the area 12 with the heat sealing lacquer on the outer side has been omitted. The bag is in particular made up of a layer 15 of paper. Although multi-layer structures are also conceivable, in the illustrated example there is only one layer of paper 15.

[0054] As the paper itself does not have heat sealing capabilities, a heat sealable material must be applied to the paper 15 layer in the form of a sealing layer 16. This can take various forms. In particular, polyethylene is used as the heat sealable material for the sealing layer 16, but the proportion of this polymer is to be kept as low as possible, with the aim of achieving the aforementioned high paper content.

[0055] In Fig. 3A, the coating 16 is therefore only provided in the area where a heat-sealed seam, for example a longitudinal seal seam 5 or an oblique seal seam 7, is subsequently formed. Since the packaging bag is eventually closed with a transverse seam, a coating of sealing layer 16 is also required there. In the areas where no heat sealing takes place, the sealing layer 16 can generally be omitted.

[0056] However, paper has very poor water vapor barrier properties, so it would be useful to provide a sealing layer 16 on the entire surface, as shown in Figure 3B. It should be noted that such packaging bags are frequently used for packaging diapers. This use (of the above-mentioned packaging bag for packaging diapers) is also within the scope of the present invention. Paper diapers, in particular, but also other sanitary products, have a high proportion of highly absorbent materials, which tend to absorb moisture from the environment due to their hydrophilic properties. Thus, by applying a thin sealing layer 16, the water vapor barrier properties can be significantly increased.

[0057] For full surface placement, however, a relatively thin sealing layer 16 is aimed for in order to keep the proportion of polymeric material as low as possible. At the same time, however, this impairs the heat sealability or stability of the applied heat seal seam. In principle, this can be compensated for by increasing the width of the heat seal seam. The embodiment according to FIG. 3B, however, provides an embodiment in which an additional layer 20 of heat sealable material is only partially coated onto the sealing layer. This results in areas with a thicker layer of heat sealable material, designed for the heat seal seam, and areas with a thinner layer of heat sealable material, where no heat seal seam is introduced. FIG. 3B shows an example of this, for example in the case of a protrusion 3.

[0058] Thus, a packaging bag is formed which is largely (notwithstanding the above) closed by a heat-sealed seam. Only at the bottom edge 6 the front wall 1 and the rear wall 2 are joined by a bottom gusset 8. The advantage of the oblique corner 11 with the oblique seam 7 can be seen in particular in FIG. 4, which shows an embodiment of the packaging bag according to FIG. 1B. As a result of the omission of excess material, a bottom 17 is produced which allows an essentially cubic construction even with a relatively stiff paper. The packaging bag according to FIG. 4 is filled with diapers one on top of the other and then closed in the upper area 18 by a transverse seam.

[0059] The following table shows a comparison between a conventional packaging bag made entirely of polyethylene and a packaging bag according to the invention made of kraft paper with a polyethylene sealing layer 16 having a thickness of 80 gsm and a basis weight of 4 gsm (grams per square meter). The sealing layer 16 extends over the entire layer of kraft paper. At the heat-sealed seam, no additional material for the sealing layer 16 was applied. Instead, a heat-sealed seam of corresponding width was formed. [Table 1]

[0060] Based on the comparative values, it is clear that the bags have similar material thicknesses but differ significantly from one another, especially with regard to strength, toughness and strength of the sealing seams. Despite the advantages of bags made entirely of polyethylene, within the scope of the present invention it has been possible to provide packaging bags which have sufficiently good material properties and, in contrast to bags made of polyethylene, are produced to a large extent from renewable raw materials. The disadvantages of having paper, especially the high stiffness, are eliminated with regard to the desired dimensional stability by using the beveled corners 11. The area 12 with the heat-sealing lacquer also advantageously contributes to the fact that the head area 18 can be closed reliably and with a constant shape.

[0061] In Figures 5 and 6, the packaging bag does not have beveled corners 7. Rather, the bottom gusset 8 is reinforced by connecting portions of the bottom gusset 8. In Figure 5, openings 21 are provided in portions of the bottom gusset 8, allowing the front wall 1 and the back wall 2 to be sealed to each other through the bottom gusset. According to Figure 6, the bottom gusset sections 9, 10 have a coating of heat sealable material so that they can be joined to each other through a sealing seam 22.

[0062] 7A and 7B show an alternative embodiment of the bottom gusset 6 (8) which is not integrally formed with the front wall 1 and the back wall 2 but is formed via a separate bottom plate 25. The joining is via a seam 23, and in FIG. 7A the front wall 1 and the back wall 2 are straight at the bottom joint 24, and in FIG. 7B the front wall 1 and the back wall 2 are folded back at the bottom joint 24.

[0063] According to Fig. 7A, seam 23 is under shear stress, and according to Fig. 7B, seam 23 is under peel stress. Shear stress is particularly beneficial for seam 23, since it can absorb higher loads. In addition, the design according to Fig. 7A also creates a more rounded bottom shape.

[0064] In FIG. 8, a different embodiment of the bottom gusset is provided, in which at least one of the front wall 1 and the rear wall 2 is connected to the bottom gusset section 9, bottom gusset section 10 via a number of secondary transverse seams 26 extending laterally. The secondary transverse seams 26 are spaced apart from the transverse seams 19 so that a compensation chamber 27 is created by each of them. The secondary transverse seams 26 have a number of openings through which air can enter and exit the outside of the edge of the bag. This greatly simplifies the packaging process, since there is usually enough space at the edge. This helps to avoid excessive pressure in the center of the bottom, which can cause the seam or the creased edge to burst. However, pressure extremes can also occur on the outside, in which case air can flow in the opposite direction from the center to cushion the corners of the bottom.

Claims

1. A packaging bag comprising a web having a front wall (1), a rear wall (2) projecting beyond the front wall (1) on an open upper edge of the bag, and a stacking opening (4) disposed in a section of the rear wall (2) projecting beyond the front wall (1), wherein at least a portion of the web is made of paper; A packaging bag characterized in that the front wall (1) and the rear wall (2) have a beveled corner (7) at the bottom edge (6) of the bag opposite the upper bag edge.

2. 2. Packaging bag according to claim 1, characterized in that the front wall (1) and the rear wall (2) are connected at the bottom edge of the bag by a bottom gusset (8).

3. 3. The packaging bag according to claim 1, wherein the weight ratio of the paper is 90% or more.

4. 3. Packaging bag according to claim 1 or 2, characterized in that the web comprises, on the side next to the packaging space, a paper layer (15) at least partially carrying a sealing layer (16) made of a heat-sealable material.

5. 5. Packaging bag according to claim 4, characterized in that the sealing layer completely covers the paper layer (15) on the side next to the packaging space.

6. 6. Packaging bag according to claim 5, characterized in that an additional layer (20) of heat sealable material is coated only in sections on the sealing layer (16).

7. 7. Packaging bag according to claim 6, characterized in that the sealing layer (16) is applied by extrusion lamination and the additional layer (20) is applied by extrusion lamination or dispersion coating.

8. 5. Packaging bag according to claim 4, characterized in that the front wall (1) and the rear wall (2) are connected to each other at their lateral edges via a longitudinal sealing seam (5).

9. 5. The packaging bag according to claim 4, which is dependent on claim 2, characterized in that the bottom gusset (8) portions of the bottom gusset (8) are joined at the corners (11) to the adjacent front wall (1) or at the corners (11) to the adjacent rear wall (2) via oblique sealing seams (7).

10. 10. Packaging bag according to claim 9, characterized in that the oblique sealing seam (7) comprises an unsealed portion.

11. 5. The packaging bag of claim 4, wherein the heat sealable material is polyethylene.

12. 2. The packaging bag according to claim 1, wherein the paper is kraft paper.

13. 5. Packaging bag according to claim 4, characterized in that the paper layer (15) has a basis weight of 60 gsm and 120 gsm.

14. 5. Packaging bag according to claim 4, characterized in that the sealing layer has a basis weight between 1 gsm and 16 gsm and that the sealing layer is applied to the layer (15) of paper.

15. 2. Packaging bag according to claim 1, characterized in that a heat sealing lacquer is applied to at least one of the front wall (1) and the rear wall (2) in at least one area (12) next to the upper edge of the bag below the outer protrusion (3).

16. A packaging bag comprising a web having a front wall (1), a rear wall (2) projecting beyond the front wall (1) at an open upper edge of the bag, and a stacking opening (4) arranged in the section of the rear wall (2) projecting beyond the front wall (1), wherein the web is at least partially made of paper, and the front wall (1) and the rear wall (2) are joined together at the bottom edge of the bag by a bottom gusset (8). A packaging bag characterized in that a plurality of bottom gusset (8) portions of the bottom gusset (8) are at least partially joined at the side edges of the bottom gusset (8).

17. Use of the packaging bag according to claim 1 or 16 for packaging diapers.

18. 18. Use according to claim 17, provided that the packaging bag is closed using a transverse sealing seam in the head region.

19. 19. The use according to claim 18, wherein the packaging bag containing the diapers has a cubic shape.

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