Sheet-like composite material for producing package, package sleeve, and package

Abstract

A sheet-like composite material (1) for producing packages (15) according to claim 1 is described. Furthermore, a packaging sleeve (13) according to claim 8 for producing a packaging (15) and made of a composite material (1) and a packaging (15) according to claim 10 made of a composite material (1) are described.

Description

Technical Field

[0001] This invention relates to a sheet composite material for manufacturing packaging, the sheet composite material comprising: a polymer outer layer; a polymer inner layer; and a fiber support layer disposed between the polymer outer layer and the polymer inner layer, wherein the sheet composite material has multiple fold lines arranged and designed such that a closed package is manufactured by folding the sheet composite material along the fold lines and by connecting the sealing surface, sleeve surface, bottom surface, and gable wall surface of the sheet composite material; wherein the bottom surface comprises a triangular bottom surface and a quadrilateral bottom surface; wherein the gable wall surface comprises a triangular gable wall surface and a quadrilateral gable wall surface; and wherein the bottom surface and the gable wall surface are arranged on opposite sides of the sleeve surface, wherein the central quadrilateral gable wall surface has a front edge adjacent to the sleeve surface and at least segmentally curved, and wherein the central quadrilateral gable wall surface has a straight front axis connecting the two front corner points of the central quadrilateral gable wall surface.

[0002] The present invention also relates to a packaging sleeve made of composite material for manufacturing packaging, the packaging sleeve comprising: a sleeve surface, wherein the sleeve surface includes a front surface and a rear surface; a bottom surface, wherein the bottom surface includes a triangular bottom surface and a quadrilateral bottom surface; and a gable wall surface, wherein the gable wall surface includes a triangular gable wall surface and a quadrilateral gable wall surface; two auxiliary fold lines extending parallel to each other through the sleeve surface; and a longitudinal joint connecting two edge regions of the composite material to form a circumferential packaging sleeve, the circumferential packaging sleeve being open in both the bottom surface region and the gable wall surface region, wherein the bottom surface and the gable wall surface are located on opposite sides of the sleeve surface, wherein the packaging sleeve is folded along the two auxiliary fold lines. The central quadrilateral gable wall surface has a front edge adjacent to the sleeve surface and at least segmentally curved, and wherein the central quadrilateral gable wall surface has a straight front axis connecting the two front corner points of the central quadrilateral gable wall surface.

[0003] Finally, the present invention relates to a package made of a composite material, wherein the package is made of a sheet composite material as described in the preamble of claim 1, or wherein the package is made of a packaging sleeve as described in the preamble of claim 8, and wherein the package is sealed in the bottom and gable regions. Background Technology

[0004] Packaging can be manufactured in various ways and from a wide range of materials. Common methods for manufacturing this type of packaging include: creating blanks by cutting sheet composite materials, forming packaging sleeves through folding and further steps, and finally completing the package. Alternatively, packaging can be manufactured directly from the sheet composite material, without the intermediate step of using packaging sleeves. This method offers particular advantages: the sheet composite material and packaging sleeves are very flat, allowing for stacking and saving space. In this way, the manufacturing locations of the composite material and packaging sleeves can differ from the folding and filling processes of the packaging. Composite materials are commonly used raw materials for this type of packaging; for example, flat sheet composite materials consisting of multiple thin layers of paper, cardboard, plastic, and / or metals (especially aluminum). This type of packaging is particularly widely used in the food industry.

[0005] The first step in manufacturing typically involves creating a blank by cutting sheet-like composite material, and producing the blank into a circumferential packaging sleeve by folding and sealing or adhesive seams. Folding is usually done along a stamped fold line. Therefore, the location of the fold line generally corresponds to the location of the edge of the package to be manufactured from the packaging sleeve. Although edges formed by folding along a fold line are mostly straight, it is known and feasible to form curved edges by folding the composite material along curved fold lines. For example, patent EP 3228552B1 discloses a package with at least partially curved edges.

[0006] Packaging with curved edges is not only visually appealing but also offers technical functionality and advantages. For example, if the front edge of the central (usually quadrilateral) gable wall curves outward, the gable wall area increases, allowing it to support a larger closure element. This enables even smaller packages to accommodate larger closure elements, facilitating drinking or pouring out the liquid contents.

[0007] While gable walls with curved front edges offer the advantages mentioned above, it is known that gable walls with front edges extending far outwards also present problems. A major issue is that these gable walls often develop wrinkles or creases. This results in an uneven gable wall, making it difficult to install nozzles and sealing elements onto it. Nozzles are typically attached to the gable wall using adhesive, and if the gable wall is uneven or wavy, it can lead to adverse consequences. Summary of the Invention

[0008] In this context, the object of the present invention is to design and further develop a sheet-like composite material as described above and explained in detail below, so as to achieve a reliable connection between the gable wall and the nozzle for a gable wall with a curved front edge.

[0009] For the flat sheet-like composite material described in the preamble of claim 1, the above objective is achieved by the following: the maximum vertical distance between the straight front axis and the curved front edge is 5 mm or less, preferably 4 mm or less, and more preferably 3.5 mm or less.

[0010] The sheet composite material of the present invention is used for manufacturing packaging. The sheet composite material can be cut into defined sizes, which are sufficient to manufacture multiple packages or only a single package. Therefore, the composite material cut into defined sizes, particularly into the size of a single package, is also referred to as a "preform". The sheet composite material has multiple overlapping and interconnected layers, thus forming a flat sheet composite material.

[0011] The sheet-like composite material comprises a polymer outer layer, a polymer inner layer, and a fiber support layer disposed between the polymer outer layer and the polymer inner layer. Since the polymer inner layer and polymer outer layer are made of plastic, the composite material exhibits liquid-tight properties. On the other hand, the fiber support layer (preferably paper or paperboard) primarily serves to improve the mechanical properties of the composite material, particularly enhancing its rigidity. Optionally, a barrier layer may also be disposed between the polymer outer layer and the polymer inner layer (preferably between the fiber support layer and the polymer inner layer). The barrier layer may be made of, for example, aluminum, and is designed to prevent the passage of light and / or oxygen. The barrier layer may be made of, for example, a polymer, such as polyamide, EVOH, PVOH, or the like. The polymer can be coated using a vapor deposition method.

[0012] The sheet composite also features multiple fold lines, which are arranged and designed to allow for the creation of closed packaging by folding the sheet composite along these fold lines and connecting the sealing surfaces of the sheet composite. Therefore, the fold lines (also known as "indentation lines" before folding) are designed to facilitate the folding of the sheet composite; they can be created through material weakening. Since the packaging to be made from the composite should be liquid-tight, material weakening does not use perforation but rather involves imprinting (typically linear) material displacement onto the composite using a pressing tool.

[0013] The sheet-like composite material has a sleeve surface, which preferably includes an inner region (the front side of the flat packaging sleeve) and two outer regions (the rear side of the flat packaging sleeve). The sheet-like composite material also has a bottom surface, which includes a triangular bottom surface and a quadrilateral bottom surface. The sheet-like composite material also has a mountain-shaped wall surface, which includes a triangular mountain-shaped wall surface and a quadrilateral mountain-shaped wall surface. Preferably, the bottom surface and the mountain-shaped wall surface each have two or three quadrilateral faces and six triangular faces. The quadrilateral faces are used for folding the bottom and mountain-shaped walls of the packaging. The triangular faces are used for folding excess composite material into protruding "ears" which are then placed against the packaging. The bottom surface and the mountain-shaped wall surface are located on opposite sides of the sleeve surface. Preferably, in an upright packaging, the mountain-shaped wall surface is located above the sleeve surface, and the bottom surface is located below the sleeve surface. The term "quadrilateral" includes not only square, rectangular, or trapezoidal shapes, but also any shape with four corners, even including interior angles and shapes that deviate from 360°, which can be achieved, for example, by having one or more sides of a quadrilateral gable wall that do not extend in a straight line but are curved.

[0014] The central quadrilateral gable wall (to which the nozzle will be applied) has a front edge that abuts the sleeve surface and is at least segmentally curved. Preferably, the front edge curves outward (protrudes) to increase the gable wall size. One or more segments of the front edge are curved (e.g., a straight middle segment and two curved outer segments), or may be entirely curved. The central quadrilateral gable wall has a straight front axis connecting the two front corner points of the central quadrilateral gable wall. The straight front axis is an imaginary axis and does not necessarily correspond to any edge of the package.

[0015] According to the invention, the maximum vertical distance between the straight front axis and the curved front edge is 5 mm or less, preferably 4 mm or less, and more preferably 3.5 mm or less. By limiting the maximum distance between the straight front axis (corresponding to the front edge of the cuboid package) and the curved front edge, the stress in the gable region is significantly reduced, and therefore, the likelihood of wrinkling in the gable region is significantly reduced. The term "vertical" is relative to the straight front axis, so the "maximum vertical distance" is the maximum length of a straight line perpendicular to the straight front axis and connecting the straight front axis to the curved front edge. This line may or may not be perpendicular to the curved front edge.

[0016] To evaluate the effectiveness of the new solution, 10,000 new packages were compared with 10,000 standard packages, as shown in Table 1 below:

[0017]

[0018] Table 1

[0019] Table 1 clearly shows that the redesigned packaging exhibits significantly improved performance: only 4.37% of the new packaging had wrinkles in the gable area (compared to 18.07% for the standard packaging), and only 4 leaks were found (compared to 84 leaks for the standard packaging). In contrast, adjustments to the sheet composite material (particularly to the material's stiffness) only achieved slightly better results than the standard material.

[0020] According to another embodiment, the minimum vertical distance between the straight front axis and the curved front edge is at least 0.5 mm, preferably at least 1.0 mm. By defining the minimum distance between the straight front axis and the curved front edge, it is ensured that the curved front edge extends outward sufficiently so that the gable wall is still large enough to accommodate a larger nozzle / closure.

[0021] According to another embodiment, the front edge of the central quadrilateral gable wall is continuously curved. Compared to a front edge that is only segmented (e.g., a straight middle section and two curved outer sections), a continuously curved front edge has the advantage of being very smooth in shape, which further reduces stress in the gable wall area and the likelihood of wrinkling. Preferably, the front edge has a constant radius of curvature.

[0022] According to another embodiment, the front edge of the central quadrilateral gable wall has a radius of curvature of at least 40 mm, preferably at least 60 mm, and more preferably at least 80 mm. By defining a minimum radius of curvature, it can be ensured that the composite material is only slightly curved and has no "sharp" bends. This further reduces the possibility of wrinkling in the gable wall area. Preferably, the front edge has a constant radius of curvature.

[0023] According to another embodiment, the composite material has two auxiliary fold lines that extend parallel to each other through the sleeve surface. The auxiliary fold lines can be understood as a type of fold line different from conventional fold lines, which do not subsequently form the edges of the packaging but are instead positioned between the edges of the packaging, such as in the side areas. The auxiliary fold lines are used to form the composite material into a packaging sleeve, which is preferably folded flat along the two auxiliary fold lines for stacking and transport in a space-saving manner.

[0024] According to another embodiment, the composite material has two rear edge fold lines that extend through the outer area of ​​the sleeve surface and preferably include single-straight sections, double-straight sections, and curved transition sections. The rear edge fold lines define the shape of the rear edge. The rear edge fold lines preferably have single-straight sections at the bottom (near the bottom surface) and top (near the gable wall), which simplifies the shaping of the bottom and gable wall of the package by simplifying the geometry of the tooling. Between these single-straight sections, the rear edge fold lines preferably have double-straight sections (two parallel straight sections), which create a smooth transition between the sides and back of the package. Compared to the 90° right-angle edges of a cuboid package, this design makes the transition between the sides and back of the package smoother because the composite material requires less folding or bending. This also reduces stress in the composite material, particularly reducing the risk of fiber breakage or fracture in the fiber support layer (paper or cardboard layer). Another advantage of the smooth transition between the sides and back is that the package can be gripped more easily. Furthermore, because the shape of the rear edge creates a gap between adjacent packages, air circulation between adjacent packages (e.g., on a shelf) is improved compared to cuboid packages. The rear edge fold line preferably has a curved transition section between two single-straight sections and a double-straight section.

[0025] According to another embodiment, the fiber support layer of the composite material has a main fiber direction extending approximately parallel to the straight front axis of the central quadrilateral gable wall. Paper and paperboard are materials made from pulp fibers. While fibers are uniformly distributed in all directions in conventional (handmade) papermaking, directional fiber alignment can be achieved in mechanical papermaking. Since the mechanical properties of paper in the fiber direction differ from those in the transverse direction (i.e., anisotropy), adjusting the fiber orientation can yield optimal material properties for a specific application. The main fiber direction should be approximately parallel to the straight front axis of the central quadrilateral gable wall. This means that the main fiber direction of the packaging extends circumferentially along the packaging, i.e., around the sleeve surface. This has the advantage of improved packaging stability. In particular, when the packaging is subjected to compressive stress (e.g., in the case of multiple layers stacked on a pallet), stability is significantly increased compared to packaging with fibers arranged in a vertical direction, because the packaging only bends under higher compressive stress.

[0026] The aforementioned objective can also be achieved by a packaging sleeve made of composite material for manufacturing packaging, the packaging sleeve comprising: a sleeve surface, wherein the sleeve surface includes a front surface and a rear surface; a bottom surface, wherein the bottom surface includes a triangular bottom surface and a quadrilateral bottom surface; and a gable wall surface, wherein the gable wall surface includes a triangular gable wall surface and a quadrilateral gable wall surface; two auxiliary fold lines extending parallel to each other through the sleeve surface; and a longitudinal seam connecting two edge regions of the composite material to form a circumferential packaging sleeve, the circumferential packaging sleeve being open in both the region of the bottom surface and the region of the gable wall surface, wherein the bottom surface and the gable wall surface are arranged on opposite sides of the sleeve surface, wherein the packaging sleeve is folded along the two auxiliary fold lines, wherein the central quadrilateral gable wall surface has a front edge abutting the sleeve surface and being at least segmentally bent, and wherein the central quadrilateral gable wall surface has a straight front axis connecting the two front corner points of the central quadrilateral gable wall surface. According to the invention, the packaging sleeve is characterized in that the maximum vertical distance between the straight front axis and the curved front edge is 5 mm or less, preferably 4 mm or less, more preferably 3.5 mm or less. The related characteristics and advantages have been explained in conjunction with claim 1, and since the packaging sleeve is made of sheet composite material, these properties and advantages can be correspondingly transferred from the sheet composite material to the packaging sleeve (because the packaging sleeve is made of sheet composite material).

[0027] Preferably, the packaging sleeve is made of a sheet-like composite material according to any one of claims 1 to 7. Since the packaging sleeve is made of one of the aforementioned sheet-like composite materials, many of the properties and advantages of sheet-like composite materials are also applicable to the packaging sleeve, and therefore reference can be made to the corresponding embodiments.

[0028] The aforementioned inventive objective can also be achieved by a package made of a composite material, wherein the package is made of the sheet composite material as described in the preamble of claim 1, or wherein the package is made of the packaging sleeve as described in the preamble of claim 8, and wherein the package is sealed in both the bottom and gable regions. According to the invention, the maximum vertical distance between the straight front axis and the curved front edge is 5 mm or less, preferably 4 mm or less, more preferably 3.5 mm or less. The relevant characteristics and advantages have been explained, and these properties and advantages can be correspondingly transferred from the composite material and the packaging sleeve to the package. The package can be made directly of the sheet composite material, or it can be made of a packaging sleeve that has previously been made of a flat sheet composite material.

[0029] Preferably, the packaging has a sloping gable. Specifically, the gable of the packaging can be designed to slope forward, meaning the front area of ​​the packaging is lower than the rear area. Due to the sloping design of the gable, the dispensing elements (e.g., nozzles and closures) located in the gable area have less impact on packaging stacking than packaging with a flat gable. This is because, compared to packaging with a flat gable, the dispensing elements in packaging with a sloping gable are not necessarily the highest point of the packaging (or at least do not protrude as much). Furthermore, this design also improves the moisture wicking properties of the gable surface. Attached Figure Description

[0030] The invention will now be explained in more detail with reference to the accompanying drawings, which illustrate only preferred exemplary embodiments, wherein:

[0031] Figure 1A A top view of the sheet-like composite material of the present invention is shown;

[0032] Figure 1B It shows Figure 1A A partially enlarged view of the sheet-like composite material shown;

[0033] Figure 2A It shows the result of Figure 1A The front view of the packaging sleeve formed by the sheet-like composite material shown;

[0034] Figure 2B It shows Figure 2A The rear view of the packaging sleeve shown;

[0035] Figure 3A It shows the unfolded state. Figure 2A and Figure 2B Packaging sleeves;

[0036] Figure 3B A sealed bottom is shown. Figure 3A Packaging sleeves;

[0037] Figure 4A It shows the result of Figure 1B The packaging sleeve shown is the packaging formed after sealing; and

[0038] Figure 4B It shows the application of the ear part Figure 4A The packaging. Detailed Implementation

[0039] Figure 1AA top view of the sheet composite material 1 of the present invention is shown. The sheet composite material 1 may comprise multiple layers of different materials; for example, paper, cardboard, plastic, or metal, particularly aluminum. The composite material 1 has multiple fold lines 2, which are designed to facilitate folding of the composite material 1 and to divide the composite material 1 into multiple faces. The composite material 1 may be divided into a sleeve face 3, a sealing face 4, a bottom face 5, and a gable face 6. The bottom face 5 includes a triangular bottom face 5T and a quadrilateral bottom face 5Q. The gable face 6 includes a triangular gable face 6T and a quadrilateral gable face 6Q, particularly a central quadrilateral gable face 6CQ. The sheet composite material 1 has an outer covering hole OCH for applying a sealing element in the region of the central quadrilateral gable face 6CQ. The outer covering hole OCH is formed by removing some layers of the composite material (particularly paper / cardboard layers), and the resulting "hole" is covered only by a polymer layer (on top).

[0040] By folding the composite material 1 to connect (especially seal) the opposite edge regions of the sealing surface 4 and the sleeve surface 3, a packaging sleeve can be formed from the composite material 1. Except for the sealing surface 4, the sleeve surface 3 extends across the entire width of the composite material 1. The composite material 1 has two auxiliary fold lines 7 in the region of the sleeve surface 3. The two auxiliary fold lines 7 are straight and extend parallel to each other. Furthermore, the auxiliary fold lines 7 pass through the contact points CB of the three adjacent triangular faces 5T of the bottom surface 5, and also through the contact points CG of the three adjacent triangular faces 6T of the mountain-shaped wall surface 6. The sleeve surface 3 is divided into an inner region 3A and two outer regions 3B by the auxiliary fold lines 7. The inner region 3A is located between the two auxiliary fold lines 7, and the two outer regions 3B are located outside the two auxiliary fold lines 7.

[0041] The bottom surface 5 forms two front corner points BF and two rear corner points BR. The gable wall 6 also forms two front corner points GF and two rear corner points GR. The corner points BF, BR, GF, and GR are the corner points of the packaging to be manufactured from the composite material 1. Each corner point BF and BR of the bottom surface 5 corresponds to a corner point GF and GR of the gable wall 6. When the packaging is upright, the corner points GF and GR of the gable wall 6 are located above their corresponding corner points BF and BR, respectively. The bottom rear corner point BR and the gable wall rear corner point GR are connected by a rear edge fold line 8. The rear edge fold line 8 has a single straight section 8A adjacent to the bottom rear corner point BR and a single straight section 8A adjacent to the gable wall rear corner point GR. In the middle section between them, the rear edge fold line 8 has a double (parallel) straight section 8B. The rear edge fold line 8 has a curved transition section 8C located between a single straight section 8A and a double (parallel) straight section 8B.

[0042] Figure 1B It shows Figure 1A A partially enlarged view of the sheet-like composite material 1 shown. Already combined... Figure 1A The region of composite material 1 described is in Figure 1B The corresponding reference numerals are provided. The upper part of the sheet-like composite material of the central quadrilateral gable wall 6CQ is... Figure 1B The details are shown in more detail below and explained further. The central quadrilateral gable wall 6CQ has a front edge 9 that abuts the sleeve surface 3, particularly its inner region 3A. The two ends of the front edge 9 are defined by the two front corner points GF of the gable wall 6. The front edge 9 should be at least segmentally curved. Figure 1B The front edge 9 is continuously (completely) curved and has a radius of curvature R9 of approximately 95 mm. The central quadrilateral gable wall 6CQ also has a straight front axis 10 connecting the two front corner points GF of the central quadrilateral gable wall 6CQ. The front edge 9 has a lowest point 11, which is defined as the point with the maximum (farthest) vertical distance 12 from the straight front axis 10 (the lowest point 9 of the sheet composite material 1 may correspond to the foremost point of the package made of the sheet composite material 1). The maximum vertical distance 12 between the straight front axis 10 and the curved front edge 9 is 5 mm or less, preferably 4 mm or less, more preferably 3.5 mm or less. The curved front edge 9 transitions approximately tangentially to the two lines connecting the front corner point GF and the rear corner point GR (contrary to the known concept, in the known concept, the curved front edge transitions approximately tangentially to the two lines connecting the front corner point GF and the contact point CG).

[0043] Figure 2A It shows the result of Figure 1A The front view of the packaging sleeve 13 formed by the sheet-like composite material 1 shown. Figure 2B It shows Figure 2A Rear view of packaging sleeve 13. Already combined. Figure 1A or Figure 1B The area described in the packaging sleeve 13 is in Figure 2A and Figure 2B The corresponding figure labels are included. Figure 2A It shows the result of Figure 1A The image shows a front view of a packaging sleeve 13 formed from the sheet-like composite material 1. The packaging sleeve 13 is made from the composite material 1 through two steps: First, the composite material 1 is folded along two auxiliary fold lines 7. Then, the two outer regions 3B (left) and 3B (right) of the sleeve surface 3 are joined together, specifically sealed together, in the region of the sealing surface 4, thereby forming a longitudinal seam 14 (in...). Figure 2A(Not visible in the center). Therefore, the packaging sleeve 13 has a closed circumferential structure in the circumferential direction, with an opening in the region of the bottom surface 5 and an opening in the region of the gable wall surface 6. The inner region 3A of the sleeve surface 3 is visible in the front view, and its sides are defined by auxiliary fold lines 7. The remaining two outer regions 3B of the sleeve surface 3 are located on the rear side of the packaging sleeve 13, and therefore in Figure 2A Invisible in the middle. The two outer regions 3B of the sleeve surface 3 are in Figure 2B Visible in the rear view. They are joined together by longitudinal seams 14, and their sides are defined by auxiliary fold lines 7. The inner region 3A of the sleeve surface 3 is located on the front side of the packaging sleeve 13, therefore in Figure 2B It is not visible in the middle.

[0044] Figure 3A It shows the unfolded state. Figure 2A and Figure 2B Packaging sleeve 13, Figure 3B A sealed bottom is shown. Figure 3A Packaging sleeve 13. Already combined Figures 1A to 2B The area described in the packaging sleeve 13 is in Figure 3A and Figure 3B The corresponding reference numerals are provided. The unfolded state is achieved by folding the packaging sleeve 13 backward along the auxiliary fold line 7 extending through the sleeve surface 3. The sleeve 13 is folded outward by approximately 180°. As a result of this outward folding, the two regions 3A and 3B adjacent to the auxiliary fold line 7 on the sleeve surface 3 no longer overlap each other, but are in the same plane. Therefore, the packaging sleeve 13 is in a flat state only when folded along the auxiliary fold line 7. Figure 2A , Figure 2B ); while in the unfolded state ( Figure 3A , Figure 3B Under these conditions, the packaging sleeve 13 (such as the packaging to be manufactured by it) no longer folds along the auxiliary fold line 7 (hence the term "auxiliary" fold line 7). Figure 3B The pre-folded state in the text indicates that the two fold lines 2 in the area of ​​the gable wall 6 have been pre-folded (and...). Figure 3A (Consistent with the previous description). Furthermore, the bottom surface 5 has been completely folded and sealed, giving the packaging sleeve 13 a sealed bottom. Figure 3A and Figure 3B In the middle, the packaging sleeve 13 has been folded along all sections 8A, 8B, 8C of the rear edge fold line 8, thus creating a smooth rear edge.

[0045] Figure 4A It shows the result of Figure 2B The packaging sleeve 13 shown is used to form the package 15 after sealing; Figure 4B It shows the application of the ear part Figure 4A Package 15. Already combined Figures 1A to 3BThe area described in the package 15 is in Figure 4A and Figure 4B The corresponding reference numerals are provided. The package 15 shown in the figure is sealed, i.e., in a filled and sealed state. After sealing, fin-shaped seams 16 are formed in the area of ​​the bottom surface 5 and in the area of ​​the gable wall 6. Although the fin-shaped seams 16 are already attached to the package 15 in the area of ​​the bottom surface 5, ... Figure 4A The central fin-shaped seam 16 still protrudes from the packaging 15 within the area of ​​the gable wall 6. During the pre-folding process, a portion of the gable wall 6 is folded outward (see...). Figure 3B This creates protruding areas of excess material, also known as "ears" 17, which are then attached to the package 15 in subsequent manufacturing steps, for example, through an adhesive process. Figure 4A In the middle, the ear portion 17 still protrudes from the packaging 15 and is attached in a later manufacturing step, for example, by an adhesive process. Figure 4B In the middle, the upper ear 17 arranged in the area of ​​the mountain-shaped wall 6 is folded downward and flatly attached to the sleeve surface 3 of the package 15. Preferably, the upper ear 17 is adhered to or sealed to the sleeve surface 3.

[0046] List of reference numerals in the attached diagram:

[0047] 1: Sheet-like composite materials

[0048] 2: Folding lines

[0049] 3: Sleeve surface

[0050] 3A: (Inner region of sleeve surface 3)

[0051] 3B: (Outer region of sleeve surface 3)

[0052] 4: Sealing surface

[0053] 5: Bottom

[0054] 5T: Triangular base

[0055] 5Q: Quadrilateral base

[0056] 6: Gable wall

[0057] 6CQ: Central quadrilateral gable wall

[0058] 6T: Triangular gable wall

[0059] 6Q: Quadrilateral gable

[0060] 7: Auxiliary fold lines

[0061] 8: Back edge fold line

[0062] 8A: (Single straight section of the rear edge fold line 8)

[0063] 8B: (Double (parallel) straight line segment of the rear edge fold line 8)

[0064] 8C: (The curved transition section of the rear edge fold line 8)

[0065] 9: (The front edge of the central quadrilateral gable wall 6CQ)

[0066] 10: Straight front axle

[0067] 11: (The low point of the leading edge 9)

[0068] 12: (Vertical distance between the front edge 9 and the straight front axis 10)

[0069] 13: Packaging sleeve

[0070] 14: Longitudinal joint

[0071] 15: Packaging

[0072] 16: Fin-shaped seam

[0073] 17: Ears

[0074] BF: (The front corner point of bottom face 5)

[0075] BR: (Back corner point of bottom face 5)

[0076] CB: (Contact point of triangular face 8 on base 5)

[0077] CG: (Contact point of triangular face 8 of gable wall 6)

[0078] GF: (Gable face 6) Front corner point

[0079] GR: (Back corner point of gable side 6)

[0080] OCH: External pore

[0081] R9: (Radius of curvature of the leading edge 9)

Claims

1. A sheet composite (1) for manufacturing a package (15), comprising: - a polymer outer layer, - a polymer inner layer, - a fibrous support layer, which is arranged between the polymer outer layer and the polymer inner layer, - wherein the sheet composite (1) has a plurality of fold lines (2) which are arranged and designed in such a way that by folding the sheet composite (1) along the plurality of fold lines (2) and by connecting the sealing faces (4) of the sheet composite (1) a closed package (15) is manufactured, - a sleeve face (3), - a base face (5), wherein the base face (5) comprises triangular base faces (5T) and quadrangular base faces (5Q), and - a gable face (6), wherein the gable face (6) comprises triangular gable faces (6T) and quadrangular gable faces (6Q, 6CQ), - wherein the base face (5) and the gable face (6) are arranged on opposite sides of the sleeve face (3), - wherein a central quadrangular gable face (6CQ) has a front edge (9) which adjoins the sleeve face (3) and is at least section-wise curved, and - wherein the central quadrangular gable face (6CQ) has a straight front axis (10) which connects two front corner points (GF) of the central quadrangular gable face (6CQ), characterized in that the maximum perpendicular distance (12) between the straight front axis (10) and the curved front edge (9) is 5 mm or less, preferably 4 mm or less, more preferably 3.5 mm or less.

2. The sheet composite (1) according to claim 1, characterized in that the minimum perpendicular distance (12) between the straight front axis (10) and the curved front edge (9) is at least 0.5 mm, preferably at least 1.0 mm.

3. The sheet composite (1) according to claim 1 or 2, characterized in that the front edge (9) of the central quadrangular gable face (6CQ) is continuously curved.

4. The sheet composite (1) according to any one of claims 1 to 3, characterized in that the radius of curvature (R9) of the front edge (9) of the central quadrangular gable face (6CQ) is at least 40 mm, preferably at least 60 mm, more preferably at least 80 mm.

5. The sheet-shaped composite material (1) according to any one of claims 1 to 4, characterized in that, further comprising two auxiliary fold lines (7) which extend through the sleeve face (3) parallel to each other.

6. The sheet-shaped composite material (1) according to any one of claims 1 to 5, characterized in that, further comprising two rear edge fold lines (8) which extend through an outer region (3B) of the sleeve face (3), and preferably the two rear edge fold lines (8) comprise a single straight line section (8A), a double straight line section (8B) and a curved transition section (8C).

7. The sheet composite (1) according to any one of claims 1 to 6, characterized in that The fiber support layer of the composite material has a main fiber direction which is substantially parallel to the straight front axis (10) of the central quadrangular gable face (6CQ).

8. A packaging sleeve (13) for manufacturing a package (15) and made of the composite material (1), comprising: - a sleeve face (3), wherein the sleeve face (3) comprises a front surface and a rear surface, - a bottom face (5), wherein the bottom face (5) comprises a triangular bottom face (5T) and a quadrangular bottom face (5Q), and - a gable face (6), wherein the gable face (6) comprises a triangular gable face (6T) and a quadrangular gable face (6Q, 6CQ), - two auxiliary folding lines (7) which extend through the sleeve face (3) parallel to each other, and - a longitudinal seam (14) which connects two edge regions of the composite material (1) to form a circumferential packaging sleeve (13) which is open both in the area of the bottom face (5) and in the area of the gable face (6), - wherein the bottom face (5) and the gable face (6) are arranged on opposite sides of the sleeve face (3), - wherein the packaging sleeve (3) is folded along the two auxiliary folding lines (7), - wherein the central quadrangular gable face (6CQ) has a front edge (9) which adjoins the sleeve face (3) and is at least section-wise curved, and - wherein the central quadrangular gable face (6CQ) has a straight front axis (10) which connects two front corner points (GF) of the central quadrangular gable face (6CQ), characterized in that the maximum perpendicular distance (12) between the straight front axis (10) and the curved front edge (9) is 5 mm or less, preferably 4 mm or less, more preferably 3.5 mm or less.

9. The packaging sleeve (13) according to claim 8, characterized in that the packaging sleeve (13) is made of the sheet-like composite material (1) according to any one of claims 1 to 7.

10. A package (15) made of a composite material (1), - wherein, the package (15) is made of the sheet-like composite material (1) according to the preamble of claim 1, or wherein the package (15) is made of the packaging sleeve (13) according to the preamble of claim 8, and - wherein the package (15) is sealed both in the area of the bottom face (5) and in the area of the gable face (6), characterized in that the maximum perpendicular distance (12) between the straight front axis (10) and the curved front edge (9) is 5 mm or less, preferably 4 mm or less, more preferably 3.5 mm or less.

11. The package (15) according to claim 10, characterized in that the package (15) has a sloping gable.

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