Pouch containing fiber material

Abstract

Each pouch (10) includes a first wall (18) and a second wall (19) made of the fibrous material (11), with the walls (18, 19) defining a closed interior (12). The pouch includes a first portion (18a) of the first wall (18), a first portion (19a) of the second wall (19), and a first seam (21) including a fibrous reinforcement (40). The fibrous reinforcement (40), the first portion (18a) of the first wall (18), and the first portion (19a) of the second wall (19) are joined together to form the first seam (21). The pouch (10) has a hole (30) that penetrates the first seam (21), and the hole (30) is positioned between a portion of the fibrous reinforcement (40) and the interior (12). A fiber reinforcement (40) is used to reinforce the first seam (21) of the pouch (10).

Description

[Technical Field]

[0001] This invention relates to pouches. This invention relates to recyclable pouches. This invention relates to pouches that can be manufactured from recyclable materials. This invention relates to hanging pouches. This invention relates to hanging reinforced pouches. [Background technology]

[0002] Food products and other goods are often sold in pouches. An example of a known pouch is shown in Figure 8a. Referring to Figure 8b, such pouches 10 are generally suspended from hangers 90. Typically, several pouches 10 are suspended from the same hanger 90 in a store. The pouch 10 has a hole 30 for hanging, as shown in Figures 8a and 8b. When suspended, the hanger 90 passes through the hole 30, as shown in Figure 8b. Such pouches are often made of plastic material.

[0003] For environmental reasons, the plastic material of the pouch 10 should preferably be replaced with a more sustainable material such as paper. Furthermore, the paper material of the pouch should not be too thick, as this unnecessarily increases material usage. The inventors found that when paper pouches were made, paper pouches of appropriate thickness would easily tear near the hole 30. Such a tear 92 is shown in Figure 8c. However, the pouch should withstand normal use without tearing.

[0004] Therefore, a fiber-based pouch that is less likely to tear near the hanging hole is needed. [Overview of the Initiative]

[0005] The inventors have found that the strength of the pouch can be increased by using reinforcing strips near the holes. Furthermore, to meet environmental requirements, the reinforcing material also includes fibrous materials such as paper or cardboard. The present invention also relates to the use of fibrous reinforcing materials for reinforcing pouches. In one embodiment, to keep the pouch visually appealing to the customer, the reinforcement is disposed between a first portion of the front wall of the pouch and a first portion of the rear wall of the pouch. Thus, the reinforcement remains hidden between the walls of the pouch.

[0006] The invention is disclosed in more specific terms in the independent claims. The dependent claims disclose preferred embodiments. The specification and drawings disclose these and other embodiments.

Brief Description of the Drawings

[0007] [Figure 1a] A front view of the pouch is shown. [Figure 1b] A rear view of the pouch of Figure 1a is shown. [Figure 1c] A cross-sectional view of the pouch of Figure 1a taken along Ic-Ic is shown, particularly showing the first seam of the pouch, and the letters IIe / IIf indicate that Figures 2e and 2f show examples of the structure of the first seam. [Figure 1d] A cross-sectional view of the pouch of Figure 1a taken along Id-Id is shown. [Figure 1e] A cross-sectional view of the pouch of Figure 1a taken along Ie-Ie is shown, particularly showing the third seam of the pouch. [Figure 2a] A cross-section of an unreinforced seam is shown in more detail. [Figure 2b-2d] For example, cross-sections of the reinforced seams of the pouches of Figures 4a and 4b are shown in more detail. [Figure 2e-2f] For example, cross-sections of the reinforced seams of the pouches of Figures 1a and 1b are shown in more detail. [Figures 3a-3d] A front view of the reinforced seam is shown. [Figure 4a] A front view of the pouch is shown. [Figure 4b] A rear view of the pouch of Figure 4a is shown. [Figure 4c] A cross-sectional view of the pouch of Figure 4a taken along IVc-IVc is shown, particularly showing the first seam of the pouch, and the letters IIb / IIc / IId indicate that Figures 2b, 2c, and 2d show examples of the structure of the first seam. [Figure 5a] The side view shows the process of unwinding the fibrous material from the roll and applying the fibrous reinforcement material onto the fibrous material. [Figure 5b] The top view shows a fibrous material to which fiber reinforcement is applied as stripes extending in the intersecting direction of the fibrous material, and a process of cutting the fibrous material to form a sheet. [Figure 5c] The top view shows that the fiber reinforcement is applied as stripes extending in the mechanical direction of the fiber material, and the fiber material is cut to form a sheet. [Figure 5d] The top view shows that a fibrous material is cut into two halves, a fibrous reinforcing material extending in the intersecting direction of the fibrous material is applied, and each half of the fibrous material is cut to form a sheet. [Figure 5e] The top view shows that the fibrous material is cut into two, and a fibrous reinforcement extending in the mechanical direction of the fibrous material is applied. [Figure 5f] This shows a pouch in which the fiber reinforcement extends in a direction that intersects with the fibrous material of the pouch wall. [Figure 6a] This shows a first method of folding a sheet to form a pouch. [Figure 6b] The first method describes a primary method of applying a heat-activatable material to a sheet before folding the sheet to form a pouch. [Figure 6c] A second method is shown in which a heat-activatable material is applied to the sheet before folding the sheet to form a pouch using the first method. [Figure 6d] A first method for forming a pouch by folding a sheet having two stripes of fiber reinforcement is shown. [Figure 7a] A second method of folding the sheet to form a pouch is shown. [Figure 7b] The primary method involves applying a heat-activatable material to a sheet before folding it to form a pouch using a second method. [Figure 7c] A second method is shown in which a heat-activatable material is applied to the sheet before folding the sheet to form a pouch using the second method. [Figure 7d]A second method is shown for folding a sheet having only short stripes of fiber reinforcement to form a pouch. [Figure 8a] This shows a pouch that can be hung up. [Figure 8b] Shows a hanging pouch. [Figure 8c] Shows the destroyed pouch. [Modes for carrying out the invention]

[0008] Figures 1a to 1e show details of the pouch 10. The pouch has a hole 30. As shown in the background art, the pouch 10 can be suspended from a hanger 90, thereby allowing the hanger 90 to pass through the hole 30. The walls of the pouch 10 are made from a fibrous material to improve recyclability.

[0009] Pouch 10 can be made from a flexible sheet material by folding and joining portions of the sheet material to form seams (21, 22, 23). Throughout this specification, the term “seam” refers to a portion of the pouch where two layers of the fibrous material 11 are joined together, with at least some adhesive and optionally other materials, such as reinforcing material, placed between these two layers of the fibrous material 11. Different structural details of the seams are discussed below.

[0010] At least the first seam 21 of the seams is reinforced so that the pouch 10 is not made solely by folding a sheet of material. If made by folding, a portion of the sheet of material forms the first wall 18 of the pouch 10, and another portion of the sheet of material forms the second wall 19 of the pouch 10. Instead of folding, the pouch 10 can be made by joining two separate pieces of sheet of material so that the first piece of sheet of material forms the first wall 18 and the second piece of sheet of material forms the second wall 19. The first wall 18 and the second wall 19 of the pouch 10 define the interior 12 of the pouch 10. The interior 12 is closed. In other words, the pouch 10 does not contain any holes or openings through which solid material can pass from the interior 12 to the outside of the pouch 10.

[0011] Walls 18 and 19 are shown in Figures 1a, 1b, and 1d; the wall limiting the interior 12 is shown in Figure 1d. During use, the interior is eventually partially filled with the articles stored in the pouch. Articles include foodstuffs (pasta, flour, sugar, granola, oatmeal), candy, and ironware (nails, screws, bolts). Depending on the articles, the properties of walls 18 and 19 may be adjusted as needed. Such properties include reducing or increasing gas permeability, improving oil resistance, and improving watertightness. Various films known in the art can be used to increase watertightness and / or reduce gas permeability and / or improve oil resistance. Such films can be applied to the inner surfaces of walls 18 and 19. The film can be applied, if necessary, for example, before the sheet 80 for forming the pouch is cut. The film can be applied, if necessary, for example, before an adhesive, for example, a heat-activatable material 43 is applied to the sheet 80. Further details of the manufacture of the pouch 10 will be described later.

[0012] By using a dispersion coating that forms a barrier over the fibrous material 11 when dry, as an alternative to a solid film, it is possible to improve watertightness, and / or reduce gas permeability, and / or improve oil resistance. Applying the barrier in the form of a dispersion coating is far easier than using a separate solid film. The term “dispersion coating” is used herein even when the material used in the dispersion coating may impregnate the fibrous material. Most preferably, the dispersion used to apply the barrier is an aqueous dispersion, i.e., a water-based dispersion. The inventors have recognized that, unlike typical solid films, dispersion coatings do not reinforce the fibrous material, thereby requiring reinforcement, especially when the barrier is applied in the form of a dispersion. Therefore, when paper to which the dispersion coating is applied is used as the fibrous material 11, reinforcement is required, and the inventors have found a way in which a fibrous reinforcement 40 can be used for that purpose. This also applies when paper to which a dispersion coating is applied and no solid film (e.g., polymer film) is applied is used as the fibrous material 11. In such cases, the dispersion coating of the fibrous material 11 preferably faces the inside 12 of the pouch. Furthermore, the dispersion coating or another dispersion coating may contain a thermally activated material 43, as detailed below.

[0013] Figures 1a to 1e and 4a to 4c show embodiments in which the first wall 18 is the front wall and the second wall 19 is the rear wall. Typically, at least the front wall of the pouch does not have a seam in the center of the front wall. This is shown in Figures 1a and 4a. The rear wall may have a seam in the center of the rear wall, as shown in Figure 1b, but it is not necessary to have a seam in the center, as shown in Figure 4b. The first wall 18 described herein can be considered as either the front wall or the rear wall, and the second wall 19 herein can be considered as either the rear wall or the front wall.

[0014] For environmental reasons, the material for pouch 10 is selected from sustainable materials. Therefore, the sheet material from which the walls 18, 19 of pouch 10 are made is fibrous. Preferably, the sheet material contains cellulose fibers. An example of such a material is paper.

[0015] Accordingly, the pouch 10 comprises a first wall 18 made of the fiber material 11 and a second wall 19 made of the fiber material 11. Preferably, the second wall 19 and the first wall 18 are made from the same fiber material 11. The first wall 18 and the second wall 19 define the interior 12 of the pouch 10.

[0016] The pouch 10 has at least a first seam 21 that closes the interior 12. The pouch 10 has a hole 30 that penetrates the first seam 21. However, the interior 12 of the pouch 10 is closed. Therefore, the hole 30 does not penetrate the interior 12 of the pouch 10. Therefore, the hole 30 penetrates only the first seam 21. Therefore, a portion of the first seam 21 is located between the hole 30 and the interior 12. The first seam 21 includes a first portion 18a of the first wall 18 and a first portion 19a of the second wall 19.

[0017] To reinforce the first joint 21 through which the hole 30 passes, the first joint 21 includes a reinforcing material. For environmental reasons, the reinforcing material is a fiber reinforcement 40. For these reasons, the first joint 21 includes the fiber reinforcement 40. The fiber reinforcement 40, the first portion 18a of the first wall 18, and the first portion 19a of the second wall 19 are joined to each other to form the first joint 21. The fiber reinforcement 40, the first portion 18a of the first wall 18, and the first portion 19a of the second wall 19 are each joined in particular in the thickness direction of the first joint 21. They are joined to each other using a suitable adhesive(s) including a heat-activatable material 43 and a pressure-sensitive adhesive 44. Thus, the first joint 21 closes the interior 12.

[0018] To keep the pouch 10 visually appealing even when the fiber reinforcement 40 is applied, it is preferable that the fiber reinforcement 40 be placed between the walls 18 and 19, so that it remains hidden between the walls 18 and 19. In particular, it is preferable that the fiber reinforcement 40 be placed between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. See Figures 1c and 4c. However, the fiber reinforcement 40 does not have to be placed between the walls 18 and 19, and instead may be placed at the first joint 21, for example, between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19 and the fiber reinforcement 40 (not shown).

[0019] For these reasons, in one embodiment, the first joint 21 includes a fiber reinforcement 40 positioned between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. The fiber reinforcement 40 is joined to the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. Thus, the first joint 21 closes the interior 12.

[0020] Figures 1c and 4c show the fiber reinforcement 40 of the first seam 21 in more detail. Figure 1c is a cross-section of the first seam 21 shown in Figure 1a. As shown in Figure 1c, the first portion 18a of the first wall 18 is made of fiber material 11, and the first portion 19a of the second wall 19 is made of fiber material 11. Figure 1c also shows the thickness T of the fiber reinforcement 40. Figure 1c also shows a portion of the second seam 22 which is better shown in Figure 1b. The second seam 22 in Figures 1b to 1e is a particular type of result of folding the sheet 80 to form the pouch 10. However, as detailed above, the pouch can also be made by other means. Therefore, the pouch does not need to have the second seam 22 in the rear central part (see Figures 4a to 4c).

[0021] Even if not shown in Figure 1c or Figure 4c, some adhesive, such as a heat-activated material 42 and / or a pressure-sensitive adhesive 44, is provided between (a) the first portion 18a of the first wall 18 and the fiber reinforcement 40, and between (b) the first portion 19a of the second wall 19 and the fiber reinforcement 40. A more detailed example of the structure of the first seam 21 of the pouch 10 in Figures 1a to 1e is shown in Figures 2e and 2f, showing the portion indicated by the letters IIe / IIf in Figure 1c. A more detailed example of the structure of the first seam 21 of the pouch 10 in Figures 4a to 4c is shown in Figures 2b, 2c and 2d, showing the portion indicated by the texts IIb / IIc / / IId in Figure 4c. This applies when the fiber reinforcement 40 is placed between the walls 18 and 19.

[0022] If the fiber reinforcement 40 is not placed between the walls 18 and 19, some adhesive, such as a heat-activated material 42, is placed between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19 to directly bond these portions 18a and 19a to each other (not shown). Furthermore, several adhesives, such as a heat-activated material 42 and / or a pressure-sensitive adhesive 44, are provided so that the fiber reinforcement 40 is directly bonded to only one of the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19, i.e., the fiber reinforcement 40 remains as the outermost layer of the first joint 21. The fiber reinforcement 40 is bonded to at least one of the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. In this case, at least one of the heat-activated material 42 and the pressure-sensitive adhesive 44 is also used as a bonding adhesive.

[0023] In pouch 10, the hole 30 is positioned between a portion of the fiber reinforcement 40 and the interior 12. More specifically, the hole 30 is positioned between a portion of the fiber reinforcement 40 and the interior 12 of pouch 10 in a second direction D2 of pouch 10, the second direction being directed from the bottom edge E2 of pouch 10 to the top edge E1 of pouch 10. An alternative definition of the second direction D2 follows. In particular, the entire hole 30 is positioned in this direction between a portion of the fiber reinforcement 40 and the interior 12. With the hole 30 positioned in this manner, a portion of the fiber reinforcement 40 is positioned between the hole 30 and the top edge E1 of pouch. Thus, the fiber reinforcement 40 reinforces the portion of pouch 10 remaining between the hole 10 and the top edge E1. Thus, the fiber reinforcement 40 equalizes the stress concentration that could otherwise be imposed on the side of the hole 30. The side of the hole 30 refers to the side that would tend to break in the absence of the reinforcing material 40, as shown by the tear 92 in Figure 8c. In this way, the fiber reinforcing material 40 strengthens the pouch 10 against tearing, particularly near the hole 30. The tearing is shown in Figure 8c.

[0024] Figures 3a to 3d show four examples of how the hole 30 of the pouch 10 may be positioned between a portion of the fiber reinforcement 40 and the interior 12. In Figure 3a, the first seam 21 is the same width and length as the fiber reinforcement 40. The width of the fiber reinforcement 40 is indicated by the symbol W. Thus, the entire first seam 21 has the general structure shown in Figure 1c. Further details of such a structure are shown in Figures 2b to 2f and will be described in more detail below. As shown in Figure 3a, in one embodiment, a portion of the fiber reinforcement 40 is positioned between the hole 30 and the interior 12. However, this is not the case in the embodiment shown in Figure 3b.

[0025] In Figure 3b, the fiber reinforcement 40 is provided only in the upper part 21a of the first joint 21. Therefore, the fiber reinforcement 40 is not provided in the lower part 21b of the first joint 21. Consequently, in the lower part 21b, the walls 18 and 19 of the pouch 10 are joined to each other without the presence of fiber reinforcement 40 between them. Therefore, in Figure 3b, the width W of the fiber reinforcement 40 is smaller than the width of the first joint 21 (the width defined in the second direction D2). However, in Figure 3b, the first joint 21 is the same length as the fiber reinforcement 40 (the length defined in the first direction D1).

[0026] Accordingly, the upper part 21a of the first joint has a general structure as shown in Figure 1c. Details of such a structure are shown in Figures 2b to 2f. However, the lower part 21b of the first joint 21 has a general structure as shown in Figure 2a. In Figures 2a to 2f, reference numeral 42 indicates a first type of adhesive, such as a heat-activated material. In Figures 2b to 2f, reference numeral 44 indicates a second type of adhesive, such as a pressure-sensitive adhesive.

[0027] In Figures 3a and 3b, the length L of the fiber reinforcement 40 is equal to the width W of the pouch 10. 10 It is equal to (both defined in the first direction D1). Furthermore, since the interior 12 is closed, the width W of the pouch 10. 10 This is equal to the length of the first joint 21. However, the entire hole 30 can be positioned between a portion of the fiber reinforcement 40 and the interior 12, even if the fiber reinforcement 40 is somewhat shorter. Such embodiments are shown in Figures 3c and 3d.

[0028] In Figure 3c, the first seam 21 has the same width as the fiber reinforcement 40. However, the length L of the fiber reinforcement 40 is equal to the width W of the pouch 10. 10 It is shorter than that.

[0029] In Figure 3d, the first seam 21 is wider than the fiber reinforcement 40. Furthermore, the length L of the fiber reinforcement 40 is equal to the width W of the pouch 10. 10It is shorter than [the other]. In Figure 3d, the fiber reinforcement 40 is provided only on the upper part 21a of the first joint 21. Therefore, the fiber reinforcement 40 is not provided on the lower part 21b of the first joint 21.

[0030] Preferably, the fiber reinforcement 40 contains cellulose fibers, and the fiber material 11 contains cellulose fibers. More preferably, the fiber reinforcement 40 contains cellulose-containing paper or cardboard. Preferably, the first wall 18 and the second wall 19 contain the same fiber material 11. Preferably, the fiber material 11 contains cellulose fibers. Preferably, the fiber material 11 contains cellulose-containing paper.

[0031] The purpose of the fiber reinforcement 40 is to reinforce the first joint 21. Therefore, in a preferred embodiment, the area density of the fiber reinforcement 40 is equal to or greater than the basis weight of the fiber material 11. More preferably, the area density of the fiber reinforcement 40 is greater than the basis weight of the fiber material 11.

[0032] In this specification, the term basis weight of the fiber material 11 means a unit of mass per unit area, most typically in grams per square meter (g / m²). 2 This refers to the surface-specific density of the fibrous material 11 (i.e., the material for the walls of the pouch 10), given by ). The definition makes sense for this material because the fibrous material 11 is generally in sheet form and has a substantially uniform thickness. Furthermore, the term basis weight is commonly used in the field of the paper industry. During the manufacturing process, the fibrous material 11 may be covered with, for example, a heat-activatable material 43, which may be converted into a heat-activatable material 42. The term basis weight refers to the surface density before the application of further materials such as the heat-activatable material 43.

[0033] In this specification, the term "area density of fiber reinforcement 40" refers to the total specific surface density of the material of the fiber reinforcement 40 located in the first joint 21. Preferably, the fiber reinforcement 40 is located between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19, so that the term "area density of fiber reinforcement 40" refers to the total specific surface density of the material of the fiber reinforcement 40 located between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. The area from which the specific surface density is calculated refers to the area of ​​the cross-section of the first joint 21 on a plane defined by the first direction D1 and the second direction D2 (such a cross-section is shown, for example, in Figures 3a to 3d), and refers only to such portion of the cross-section containing the material of the fiber reinforcement 40.

[0034] Referring to Figures 2b to 2d, the fiber reinforcement 40 may be provided as a single layer of material. In such a case, the area density of the fiber reinforcement 40 refers to the specific surface density of a single layer of material of the fiber reinforcement 40. Such a first seam 21 can be obtained by folding the sheet 80, for example, as shown in Figures 6a to 6c or Figure 7d. However, referring to Figures 2e and 2f, the fiber reinforcement 40 may be provided as two layers of material. In such a case, the area density of the fiber reinforcement 40 refers to the total specific surface density of the two layers of material of the fiber reinforcement 40. Such a first seam 21 can be obtained by folding the sheet 80, for example, as shown in Figures 7a to 7c or Figure 6d.

[0035] Preferably, the fiber reinforcement 40 is arranged as the sole layer of material. This reduces the need to use adhesives to bond the layers together. An example of a method for forming a first seam 21 having the fiber reinforcement 40 arranged as only one layer is shown in Figures 6a and 7d.

[0036] In the embodiments of FIGS. 2b to 2d, regarding the areal density of the fiber reinforcing material 40 and its relationship to the basis weight of the paper-like material or cardboard material used as the fiber reinforcing material 40, the areal density of the fiber reinforcing material 40 is equal to the basis weight of the material of a single fiber reinforcing layer. However, in the embodiments of FIGS. 2e and 2f, the areal density of the fiber reinforcing material 40 is the sum of the basis weights of the materials of both layers of the fiber reinforcing material 40.

[0037] In order to have sufficient reinforcing properties, preferably, the areal density of the fiber reinforcing material 40 is at least 80 g / m 2 and more preferably at least 90 g / m 2 . In this specification, the areal density refers to the fiber reinforcing material 40 itself. In practice, the fiber reinforcing material 40 may be applied in the form of an adhesive tape that further contains an adhesive. Of course, the adhesive increases the mass. The above areal density refers to the areal density of the fiber reinforcing material 40 that does not include the adhesive used to adhere the fiber reinforcing material 40.

[0038] In order to save materials, the areal density should not be excessive. Therefore, preferably, the areal density of the fiber reinforcing material 40 is at most 350 g / m 2 and more preferably at most 200 g / m 2 and most preferably at most 150 g / m 2 . As described above, the areal density refers to the areal density of the fiber reinforcing material 40 that does not include the adhesive used to adhere the fiber reinforcing material 40. Therefore, the appropriate range of the areal density of the fiber reinforcing material 40 is 80 g / m 2 to 350 g / m 2 and 90 g / m 2 to 200 g / m 2 . Most preferably, the areal density of the fiber reinforcing material 40 is 90 g / m 2 to 150 g / m 2 .

[0039] In addition to area density, the width W of the fiber reinforcement 40 affects the degree of reinforcement. The width W of the fiber reinforcement 40 is shown in Figures 3a to 3d. Preferably, the width W of the fiber reinforcement 40 is 2 mm to 10 mm. The width W is measured in a second direction D2 as defined elsewhere in this specification. Thus, the width W is measured in a direction perpendicular to the first direction D1 shown in Figures 3a to 3d and perpendicular to the direction of the thickness T of the fiber reinforcement 40. The first direction D1 is also defined elsewhere in this specification.

[0040] Furthermore, the length L of the fiber reinforcement 40 affects the degree of reinforcement. The length L of the fiber reinforcement 40 is shown in Figures 3a to 3d. As shown here, the length L of the fiber reinforcement 40 is equal to the width W of the pouch 10. 10 It is oriented in the same direction. As shown in Figures 3a to 3d, preferably the length L of the fiber reinforcement 40 is longer than the length of the hole 30, and the length of the hole is measured in the same direction as the length L of the fiber reinforcement 40. Thus, the length of the hole lies between the sides S1 and S2 of the hole. Furthermore, preferably the fiber reinforcement 40 extends beyond both sides S1 and S2 of the hole 30 to the width W of the pouch 10, as shown in Figures 3c and 3d and Figures 3a and 3b. 10 It extends in the same direction. The sides S1 and S2 of the hole are shown only in Figures 8c and 3a, even if the pouch 10 in other figures has a hole and its sides.

[0041] However, for manufacturing reasons, preferably the length L of the fiber reinforcement 40 is equal to the width W of the pouch 10. 10 Equal to the width W of pouch 10 10 This is measured in the same direction as the length L of the fiber reinforcement material 40.

[0042] Therefore, in one embodiment, as shown in Figures 3a to 3d, the first seam 21 is the total width W of the pouch 10. 10The fiber reinforcement 40 extends in the first direction D1 across both sides of the hole 30. Furthermore, as shown in Figures 1c and 4c, the fiber reinforcement 40 extends between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. Preferably, as shown in Figures 3a and 3b, the first seam 21 extends across the entire width W of the pouch 10. 10 The fiber reinforcement 40 extends in the first direction D1 over the entire width W of the pouch 10. 10 It extends in the first direction D1 over the course of the distance.

[0043] With respect to the fibrous material 11 of the walls 18 and 19 of the pouch 10, in one embodiment, the basis weight of the fibrous material 11 is at least 40 g / m². 2 Preferably at least 70 g / m² 2 This basis weight is known to provide sufficient strength to the pouch 10 itself. Furthermore, the basis weight of the fiber material 11 is preferably a maximum of 160 g / m². 2 More preferably, up to 90 g / m² 2 The following is true: Such a basis weight ensures only a small amount of raw materials are used, yet provides sufficient strength. Therefore, the appropriate range for the basis weight of the fiber material 11 is 40 g / m². 2 ~160g / m 2 and 70g / m 2 ~90g / m 2 This includes the range.

[0044] Regarding the manufacture of the pouch 10, preferably, the pouch 10 is manufactured by folding a sheet 80. After folding, the parts of the walls 18, 19 formed by parts of the sheet 80 are joined together to form seams 21, 22, 23, and the pouch 10 is closed to form a closed interior. Naturally, the articles to be stored inside 12 are supplied to the interior 12 before all seams 21, 22, 23 are closed.

[0045] Figure 6a shows one method of folding the sheet 80 to form the pouch 10. As shown in Figure 6a, strips of fiber reinforcement 40 are applied to one side of the sheet 80. Figure 6a also shows the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19 before folding the sheet 80 to form the pouch 10 having walls 18, 19. The sheet 80 is folded around line L, indicated by a dotted line. The result is the pouch shown in Figures 4a and 4b. Naturally, further seams 22, 23 in Figures 4a and 4b should also be made, which can be made by bonding adhesives such as hot pressing. After folding the sheet 80 as shown in Figure 6a and described above, strips of fiber reinforcement 40 are placed between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. In Figure 6a, the fiber reinforcement 40 is provided only in the first portion 18a of the first wall 18. Correspondingly, no reinforcement is provided in the first portion 19a of the second wall 19. Therefore, after folding, only one layer of the fiber reinforcement 40 is positioned between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. This results in a first joint 21 having the structure shown in, for example, one of Figures 2b to 2d. If the fiber reinforcement 40 is provided on only one of the walls, the walls 18 and 19 may be specified such that the fiber reinforcement 40 is provided only in the first portion 18a of the first wall 18.

[0046] As shown in Figure 6d, another fiber reinforcement 40 can be provided on the first portion 19a of the second wall 19. In such a case, after folding, the two layers of fiber reinforcement 40 are positioned between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. This results in the structure shown, for example, in Figure 2e or Figure 2f.

[0047] Figure 7a shows another method of folding the sheet 80 to form the pouch 10. As shown in Figure 7a, strips of fiber reinforcement 40, 40a, 40b are applied to one side of the sheet 80. Figure 7a also shows the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. As shown in Figure 7a, the first portion 19a of the second wall 19 includes two distinct regions. The sheet 80 is folded around the line L shown by the dotted line. As a result, the pouch shown in Figures 1a to 1e can be obtained. Naturally, the further seams 22, 23 in Figures 1a to 1e should also be made, for example, by bonding adhesive. After folding the sheet 80 as shown in Figure 7a and described above, the strips of fiber reinforcement 40 are placed between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. However, as can be seen from Figure 7a, the strips of fiber reinforcement 40 are folded over themselves, so that after folding, the two layers of fiber reinforcement 40 are positioned between the first portion 18a of the first wall 18 and the first portion 19a of the second wall 19. This results in the structure shown, for example, in Figure 2e or Figure 2f. In particular, the first region of the first portion 40a of fiber reinforcement 40 is folded over a portion of the second portion 40b of fiber reinforcement 40. Furthermore, the second region of the first portion 40a of fiber reinforcement 40 is folded over a portion of the second portion 40b of fiber reinforcement 40.

[0048] As shown in Figure 7d, when the sheet 80 is folded in this manner, shorter stripes of the fiber reinforcement 40 can be used. For example, as shown in Figure 7d, if the fiber reinforcement 40 is provided in the first portion 18a of the first wall 18, it is not necessary to provide the fiber reinforcement 40 in any region of the first portion 19a of the second wall 19. After folding, the first seam 21 has the general structure shown in Figures 2b to 2d.

[0049] There are several methods for joining different material layers to each other. Preferably, the fiber reinforcement 40 is attached to the fiber material 11 by at least a pressure-sensitive adhesive 44. As an example, the fiber material 11 may be supplied in the form of a roll 70 (see Figure 5a). After the fiber material 11 is unwound from the roll 70, strips(s) of the fiber reinforcement 40 can be attached to the fiber material 11 with a pressure-sensitive adhesive 44, as shown in Figure 5a. In Figures 5a to 5d, one-way arrows indicate the direction of travel of the fiber material 11 in the production line. Figure 5a shows the fiber reinforcement 40 being applied to the fiber material 11 from above, so that the fiber reinforcement 40 remains on top of the fiber material 11. However, in one embodiment (not shown), the fiber reinforcement 40 is attached to the fiber material 11 from below, so that the fiber reinforcement 40 remains underneath the fiber material 11. In such cases, a pressure-sensitive adhesive may be used to attach the fiber reinforcement material 40 to the fiber material 11 or the heat-activatable material 43 covering the downward surface of the fiber material 11.

[0050] The stripes of the fiber reinforcement 40 may be applied to the mechanical direction MD of the fiber material 11, as shown in Figure 5c. However, preferably, the stripes of the fiber reinforcement 40 are applied to the intersecting direction CD of the fiber material 11, as shown in Figure 5b. The sheet 80 can then be formed by cutting the fiber material along the cutting line C shown in Figures 5b to 5e. Therefore, preferably, the fiber reinforcement 40 is attached to the fiber material 11 by at least a pressure-sensitive adhesive 44. Such a joint structure is shown in Figures 2c to 2f.

[0051] In many cases, the width of the roll 70 is very large, so the width of the roll 70 corresponds to the appropriate width of two or more sheets 80 for making the pouch 10. For example, the width of the roll 70 may correspond to the width of two sheets 80 for making the pouch 10. This is illustrated in Figures 5d and 5e. Both Figures 5d and 5e show a knife 72 used to cut the fibrous material 11 received from the roll 70 into two halves. Each half can then be cut along the cutting line C to form sheets 80 as shown in Figures 5d and 5e.

[0052] In this case, to simplify the manufacturing tools, the fiber reinforcement 40 is preferably applied in the intersecting direction CD, as shown in Figure 5d, before the fiber material 11 received from the roll 70 is bifurcated by the knife 72. This has the advantage that only one applicator is required to apply the fiber reinforcement 40 onto the fiber material 11 (which may be covered with a heat-activatable material 43 when applying the fiber reinforcement 40, as detailed below). In contrast, if the fiber reinforcement 40 is applied in the machine direction MD, as shown in Figure 5e, two applicators are required, each applying one stripe of the fiber reinforcement 40.

[0053] When the fiber reinforcement 40 is applied to the fiber material 11 in the intersecting direction CD as an adhesive tape containing the fiber reinforcement 40, eye marks may be printed on the fiber material 11 to determine the positions where the tape should be added in the machine direction.

[0054] Surprisingly, it was found that when the fiber reinforcement 40 was applied in the intersecting direction CD, the tendency of the pouch 10 to tear near the hole 30 was reduced. This is thought to be related to the anisotropic strength properties of the fiber material 11, as detailed below. The reason is as follows:

[0055] In terms of manufacturing, preferably, a tape containing the fiber reinforcement 40 and a pressure-sensitive adhesive 44 is used to form the fiber reinforcement 40 on the fiber material 11. Thus, such a tape is attached to the fiber material 11 as shown in Figure 5a to provide a fiber material 11 containing the fiber reinforcement 40. The tape has a density of, for example, 80 g / m². 2 ~350g / m 2 Preferably 90 g / m 2 ~200g / m 2 Most preferably 90 g / m 2 ~150g / m 2The tape may include a fiber reinforcement 40 and a pressure-sensitive adhesive 44 on the first side of the fiber reinforcement 40. These values ​​apply when the pouch is made by folding the sheet 80 such that the first seam 21 contains at least one layer of fiber reinforcement 40. If the pouch 10 is made such that the first seam 21 contains two layers of fiber reinforcement 40, the tape may contain half of these values ​​of fiber reinforcement 40. Preferably, the tape contains 15 g / m² on the first side of the fiber reinforcement 40. 2 ~50g / m 2 The material includes a pressure-sensitive adhesive 44. A thin silicone release layer (not shown) may be provided on the second opposite side of the fiber reinforcement 40. When used, such a silicone release layer can be provided on top of the fiber reinforcement 40, for example, in the embodiment of Figure 5a, and the pressure-sensitive adhesive 44 is located below the fiber reinforcement 40. The silicone release layer can assist in handling the tape. The area density of the silicone release layer is, for example, 0.1 g / m². 2 ~0.5g / m 2 It could be within the range of.

[0056] Figure 6a shows a first method of folding the sheet 80 to form a pouch. However, the pouch 10 also has seams other than the first seam 21 to close the interior 12. Figures 4a and 4b show a second seam 22 and a third seam 23 provided on the side of the pouch 10 after the sheet has been folded as shown in Figure 6a. As shown in Figure 6a, the second seam 22 is formed by attaching the second portion 22a of the first wall 18 to the second portion 22b of the second wall 19. Furthermore, as shown in Figure 6a, the third seam 23 is formed by attaching the third portion 23a of the first wall 18 to the third portion 23b of the second wall 19.

[0057] Figure 7a shows a second method of folding the sheet 80 to form a pouch. However, the pouch 10 also has seams other than the first seam 21 to close the interior 12. Figures 1a and 1b show a second seam 22 located on the rear side of the pouch 10 and a third seam 23 located on the bottom of the pouch 10. As shown in Figure 7a, the third seam 23 is formed by attaching two third portions 23b of the second wall 19 to a third portion 23a of the first wall 18. Furthermore, as shown in Figure 7a, the second seam 22 is formed by attaching a fourth portion 24b of the second wall 19 to a fifth portion 25b of the second wall 19.

[0058] The structure of the third joint 23 in Figure 1b is shown in Figure 1e. However, Figure 1e does not show the adhesive layer between walls 18 and 19. The structure showing the adhesive is shown in Figure 2a. The structure of the second joint 22 or the third joint 23 in Figure 4a is schematically shown in Figure 2a. The walls 18 and 19 containing the fibrous material 11 are joined to each other using a suitable adhesive, for example, a heat-activated material 42.

[0059] With regard to methods for joining materials together, particularly (i) joining another side of the fiber reinforcement 40 to the fiber material 11 (see Figures 2b to 2f), or (ii) joining two walls 18, 19 of the fiber material 11 together (see Figure 2a), a heat-activatable material 43 is preferably used. However, as detailed above, a pressure-sensitive adhesive 44 is preferably used to attach one side of the fiber reinforcement 40 (see Figures 2c to 2f) to the fiber material 11 or the heat-activatable material 43 covering the fiber material 11.

[0060] The thermally activated material 43 is a material that is activated by the application of heat to form a joint. In this description, reference numeral 43 represents the thermally activated material (before activation), and reference numeral 42 represents the thermally activated material (after activation and joint formation). Therefore, the thermally activated material 43 may be converted to the thermally activated material 42 by activation after a certain period of time.

[0061] The heat-activatable material 43 includes materials that melt when heated and solidify when cooled to form an adhesive bond. After solidification, the material is activated by heat and is therefore a heat-activated material 42. These materials include hot-melt adhesives. Such materials are generally reactivatable by applying heat. The heat-activatable material 43 further includes resin-based materials that harden when heated. After hardening, the material is a heat-activated material 42 and forms a bond. However, after hardening, these types of heat-activated materials are typically not reactivatable by heat.

[0062] In order to form the second seam 22 and the third seam 23, in one embodiment, at least such portions of the sheet 80 used to form the seams 22 and 23 are covered with a heat-activatable material 43, as shown in Figures 6b, 6c, 7b, and 7c.

[0063] Referring first to Figures 6c and 7c, in one embodiment, the entire sheet 80 is covered with a heat-activatable material 43. It is possible to cover the entire fiber material 11 with the heat-activatable material 43 before applying the fiber reinforcement 40 onto the sheet 80 (or more precisely, onto the heat-activatable material 43 covering the sheet). The fiber reinforcement 40 may then be attached to the heat-activatable material 43 covering the sheet 80 by a pressure-sensitive adhesive 44. The heat-activatable material 43 can be applied, for example, even before cutting a wide roll of paper into two (see Figures 5d and 5e). The sheet material on the roll 70 may have a heat-activatable coating. Alternatively, it is possible to cover the entire fiber material 11 (and fiber reinforcement 80) with the heat-activatable material 43 after applying the fiber reinforcement 40 onto the fiber material 11. The fiber reinforcement 40 may be attached by a pressure-sensitive adhesive 44.

[0064] If the entire sheet 80 is covered with the thermally activated material 43, the thermally activated material 43 (or, if activated, the thermally activated material 42) may also have the same function as the barrier of the fibrous material 11 described above. Therefore, it may be beneficial to cover the entire sheet 80 with the thermally activated material 43 from the viewpoint of reducing or increasing gas permeability, improving oil resistance, and / or improving the watertightness of the fibrous material 11. For clarity, one dispersion coating may function as both a barrier and a thermally activated material. Alternatively, the first dispersion coating may function as a barrier for the fibrous material 11, and the second dispersion coating may contain a thermally activated material.

[0065] In the former case (i.e., when the fibrous material 11 is covered with the heat-activatable material 43 before the application of the reinforcing material 40), and in the embodiment of Figure 6c, the resulting structure of the first joint 21 corresponds to the structure of Figure 2d, where the pressure-sensitive adhesive 44 connects the fibrous reinforcing material 40 to the heat-activatable material 42 on the first wall 18. Furthermore, the heat-activatable material 42 on the second wall 19 joins the second wall 19 to the fibrous reinforcing material 40.

[0066] In the latter case (i.e., when the fiber material 11 and the fiber reinforcement bonded thereto are covered with a heat-activatable material 43), and in the embodiment of Figure 6c, the resulting structure of the first joint 21 corresponds to the structure of Figure 2c, where the pressure-sensitive adhesive 44 directly connects the fiber reinforcement 40 to the first wall 18, and the heat-activatable material 42 on the second wall 19 (and on the fiber reinforcement 40 itself) bonds the second wall 19 to the fiber reinforcement 40.

[0067] In the former case (i.e., when the fibrous material 11 is covered with the heat-activatable material 43 before the application of the reinforcing material 40), and in the embodiment of Figure 7c, the resulting structure of the first joint 21 corresponds to the structure of Figure 2f, where the pressure-sensitive adhesive 44 connects the fibrous reinforcing material 40 to the heat-activatable material 42 of both the first wall 18 and the second wall 19. However, some additional adhesive 46 may be needed to attach the first portion 40a of the fibrous reinforcing material to the second portion 40b of the fibrous reinforcing material 40. The first portion 40a and the second portion 40b of the fibrous reinforcing material 40 are shown in Figures 7a to 7c. For example, a tape with pressure-sensitive adhesive on both sides of the fibrous reinforcing material 40 can be used, so that the pressure-sensitive adhesive on the opposite side of the tape serves the purpose of additional adhesive 46.

[0068] In the latter case (i.e., when the fibrous material 11 and the fibrous reinforcement bonded thereto are covered with a heat-activatable material 43), and in the embodiment of Figure 7c, the resulting structure of the first joint 21 corresponds to the structure of Figure 2e, where the pressure-sensitive adhesive 44 directly connects the fibrous reinforcement 40 to the fibrous material 11 of the first wall 18 and the second wall 19. Furthermore, the heat-activatable material applied to the first portion 40a and the second portion 40b of the fibrous reinforcement 40, after being activated to form a heat-activatable material 42, bonds to portions 40a and 40b of the fibrous reinforcement 40, which are shown as layers in Figure 2e.

[0069] It is also possible to use a heat-activatable material 43 as the sole adhesive for joining the fiber reinforcement 40 to the fiber material 11. For example, the sheet 80 may be covered with the heat-activatable material 43 (at least in the area where the fiber reinforcement 40 is attached), and the fiber reinforcement 40 may be heat-pressed onto the heat-activatable material 43 to activate the heat-activatable material and press the materials together to join them. The first joint 21 can then be completed by heat-pressing the other wall, which is properly covered with the heat-activatable material 43, onto the fiber reinforcement 40. The first joint 21 shown in Figure 2b is obtained.

[0070] In accordance with the foregoing, in one embodiment, the fiber reinforcement 40 is bonded (i.e., joined) to the first portion 18a of the first wall 18 by at least one of the heat-activated material 42 and the pressure-sensitive adhesive 44. Furthermore, for the same reasons, in that embodiment, the fiber reinforcement 40 is bonded (i.e., joined) to the first portion 19a of the second wall 19 by at least one of the heat-activated material 42 and the pressure-sensitive adhesive 44.

[0071] More preferably, the fiber reinforcement 40 is bonded to the first portion 18a of the first wall 18 by at least a pressure-sensitive adhesive 44, and the fiber reinforcement 40 is bonded to the first portion 19a of the second wall 19 by at least a heat-activated material 42.

[0072] Furthermore, in one embodiment, in particular, if the sheet-like fibrous material 11 is coated with a heat-activatable material 43 before the application of the fibrous reinforcement 40, and the fibrous reinforcement 40 is attached thereto in the form of a tape containing a pressure-sensitive adhesive 44, and the heat-activatable material 43 is converted to a heat-activated material 42 by heat activation, then the fibrous reinforcement 40 is bonded (i.e., joined) to the first portion 18a of the first wall 18 by the heat-activated material 42 and the pressure-sensitive adhesive 44. Furthermore, for the same reasons, in that embodiment, the fibrous reinforcement 40 is bonded (i.e., joined) to the first portion 19a of the second wall 19 by at least the heat-activated material 42.

[0073] As described above and in detail in Figures 1a, 1b, 4a, and 4b, in one embodiment, the pouch 10 includes a second seam 22. Here, the second seam 22 refers to a seam that crosses the first seam 21. Therefore, the first seam 21 is the total width W of the pouch 10. 10 The second joint 22 extends in the first direction D1 over the entire height H of the pouch 10. 10 It extends in the second direction D2 over the width W of the pouch 10, even if the fiber reinforcement 40 is part of the first joint 21. 10 It does not need to extend over these directions D1, D2 and measurement W. 10 H 10This is shown in Figure 1b.

[0074] As described above and in detail in Figures 1a, 1b, 4a, and 4b, in one embodiment the pouch includes a third seam 23. Depending on how the pouch 10 was manufactured, the third seam 23 may be parallel to the first seam 21 or may cross the first seam 21.

[0075] Referring to Figures 6b and 7b, it is also possible to reduce the use of the thermally activated material 43 by using it only at the locations of the seams 21, 22, and 23. Therefore, in one embodiment of the pouch 10, at least a portion of the fibrous material 11 that limits the interior 12 of the pouch 10 is not covered on the inside of the pouch 10 by either the thermally activated material 42 or the thermally activated material 43. As detailed above, the thermally activated material 43 may have similar properties to the material for the barrier of the fibrous material 11. Therefore, by using the thermally activated material 43 only at the locations of the seams 21, 22, and 23, it is possible to maintain high gas permeability of the walls 18 and 19 of the pouch 10. This is beneficial for applications where high gas permeability is desired.

[0076] Naturally, it is also possible to apply the first dispersion coating to the entire sheet 80 to form a barrier for the fibrous material 11, and to apply the second dispersion containing the heat-activatable material 43 only to the locations of the seams 21, 22, and 23.

[0077] However, from a manufacturability standpoint, it may be beneficial to cover the entire web of the fiber material 11 with the heat-activatable material 43, as shown in Figures 6c and 7c. Therefore, there is no need for equipment to target and apply the heat-activatable material 43 only to specific locations on the sheet 80. Instead, the heat-activatable material 43 may be sprayed, for example, onto the perforated web of the fiber material 11. The heat-activatable material 43 may be provided in the form of a dispersion, for example, an aqueous dispersion. Furthermore, this may be done by the manufacturer of the fiber material 11 during the manufacturing of the fiber material 11. Thus, in one embodiment of the pouch 10, all parts of the fiber material 11 that define the interior 12 of the pouch 10 are covered on the inside of the pouch 10 with either the heat-activatable material 42 or the heat-activatable material 43.

[0078] As described above, surprisingly, it was found that when the fiber reinforcement 40 is applied in the intersecting direction CD, the tendency for the pouch 10 to tear at the sides S1 and S2 of the hole 30 is reduced. The application of the fiber reinforcement 40 in the intersecting direction CD is shown in Figures 5b and 5d.

[0079] Generally, the machine direction MD of the fiber material 11 is parallel to the direction of movement of the forming wire on the machine that produces the fiber material 11, for example, the direction of movement of the forming wire on a paper machine that produces paper as the fiber material 11. The machine direction is also the direction of movement of the material web when the fiber material 11 is unwound from the roll 70. The cross direction CD intersects the machine direction MD and intersects the thickness direction of the fiber material, as shown in Figures 5a to 5e. The direction of movement of the material is indicated by a unidirectional arrow in Figures 5a to 5e. In paper, the machine direction is also the direction in which the grain of the paper is formed. Therefore, the fibers of the paper are mainly oriented in the machine direction MD. This makes the paper an anisotropic material. As a result, the strength and stiffness of individual fibers of the paper are affected by the grain direction, which means that the tensile (breaking) strength and stiffness are higher in the grain direction. Therefore, the strength and stiffness of paper are generally higher in the machine direction MD than in the cross direction CD.

[0080] When the fiber reinforcement 40 is applied in the intersecting direction CD and used in the first seam 21 as described above, the mechanical direction MD of the fiber material 11 is oriented from the bottom edge E2 of the pouch to the top edge E1 of the pouch, as shown in Figure 5f. This direction is referred to herein as the second direction D2. When the pouch 10 is suspended from a hanger and the hanger passes through the hole 30, the gravity of the pouch also moves in the second direction D2. As described above, in this embodiment, the second direction D2 is parallel to the mechanical direction of the fiber material 11. Since the fiber material 11, such as paper, naturally has higher strength in the mechanical direction MD than in the intersecting direction CD, this orientation reduces the tendency of the pouch to tear near the sides S1, S2 of the hole. Therefore, by applying the fiber reinforcement 40 in the intersecting direction CD of the fiber material 11 in the first wall 18 or the second wall 19 of the pouch 10, the tear resistance of the pouch 10 is improved.

[0081] Furthermore, if the pouch 10 is made by folding a sheet 80, it should be noted that typically the mechanical orientation of the fibrous material 11 of the first wall 18 is parallel to the mechanical orientation of the fibrous material 11 of the second wall 19. If the pouch 10 is made by joining two separate sheets together at seams (21, 22, 23), the mechanical orientations of the walls 18 and 19 of the pouch 10 may not be parallel.

[0082] As detailed above, the first seam 21 extends in the first direction D1 defined above. For clarity, the upper edge E1 of the pouch 10 is positioned in a second direction D2 perpendicular to the first direction D1 from the hole 30. Furthermore, the hole 30 is positioned in the second direction D2 from the interior 12 of the pouch 10. Thus, the upper edge E1 of the pouch 10 is positioned at the height H of the pouch, away from the bottom edge E2 of the pouch. 10 It is positioned at height H 10 It is defined in the second direction D2.

[0083] In order to reinforce the pouch 10 near the hole 30, in a preferred embodiment, the mechanical direction MD of the first wall 18 is parallel to the second direction D2, and the mechanical direction MD of the second wall 19 is parallel to the second direction D2. This is particularly applicable when the first wall 18 and the second wall 19 of the pouch 10 contain paper, especially paper containing cellulose fibers. With respect to the intersecting direction CD, the first seam 21 is located across the entire width W of the pouch 10. 10 Note that it extends in the first direction D1 over the entire length. Therefore, in this embodiment, the intersection direction CD of the first wall 18 is parallel to the first direction D1, and the intersection direction CD of the second wall 19 is parallel to the first direction D1. See Figure 5f.

[0084] As detailed above, this orientation choice also has advantages when the pouch 10 is manufactured from a sheet of fibrous material 80, and the sheet 80 is manufactured from a web of fibrous material 11 such that the web width is greater than the width of the sheet 80. See Figure 5d.

[0085] As detailed above, the fiber reinforcement 40 within the pouch 10 is for reinforcing the pouch 10, and in particular for reinforcing the pouch against tearing at the sides S1, S2 of the hole 30 of the pouch 10. Therefore, one embodiment is the use of the fiber reinforcement 40. In use, the fiber reinforcement 40 is used to reinforce the first seam 21 of the pouch 10. As described above, in use, the pouch includes a first wall 18 made of fiber material 11 and a second wall 19 made of fiber material 11. Furthermore, the first seam 21 is provided with a hole 30.

[0086] This use includes placing a fiber reinforcement 40 between a first portion 18a of the first wall 18 and a first portion 19a of the second wall 19, and placing a hole 30 between a portion of the fiber reinforcement 40 and the interior 12 of the pouch 10. Thus, the hole 30 is positioned between a portion of the fiber reinforcement 40 and the interior 12 of the pouch 10 in a second direction D2. This use further includes joining the first portion 18a of the first wall 18 to the fiber reinforcement 40 and joining the first portion 19a of the second wall 19 to the fiber reinforcement 40 to form a first joint 21 and close the interior 12.

[0087] The description of materials for joining materials applies to use. In particular, in one embodiment, at least one of the heat-activatable material 43 and the pressure-sensitive adhesive 44 is used to join the fiber reinforcement 40 to the first portion 18a of the first wall 18, and at least one of the heat-activatable material 43 and the pressure-sensitive adhesive 44 is used to join the fiber reinforcement 40 to the first portion 19a of the second wall 19. More preferably, in one embodiment, at least the pressure-sensitive adhesive is used to join the fiber reinforcement 40 to the first portion 18a of the first wall 18, and at least the heat-activatable material 43 is used to join the fiber reinforcement 40 to the first portion 19a of the second wall 19.

[0088] As described in the context of pouch 10, in one embodiment of use, the fiber reinforcement 40 is provided in the form of just one layer of a fiber reinforcement band, for example, a tape containing the fiber reinforcement 40 and pressure-sensitive adhesive 44. See Figures 2b to 2d. However, in one embodiment of use, the fiber reinforcement 40 is provided in the form of two layers of a fiber reinforcement band. See Figures 2e and 2f. Furthermore, in one embodiment of use (not shown), the fiber reinforcement 40 is provided in the form of three or more layers of a fiber reinforcement band.

[0089] The description of the area density of the fiber reinforcement 40 in relation to the pouch 10 applies to the use. However, as detailed above, the use may include the use of one, two, or three or more layers of the fiber reinforcement band. Generally, such a band includes a fiber base material and may include further layers. When the fiber reinforcement 40 is provided in the form of an adhesive tape, the adhesive tape forms a reinforcement band, and in that embodiment, the reinforcement band includes a fiber base material and an adhesive such as the pressure-sensitive adhesive detailed above. The fiber base material is a fibrous sheet material of the tape (e.g., paper or cardboard) to which the other layers of the tape are applied.

[0090] In one embodiment of use, the fiber reinforcement 40 is provided in the form of a single fiber reinforcement band, and the basis weight of the fiber base material of the fiber reinforcement band is 80 g / m². 2 ~350g / m 2 Preferably 90 g / m 2 ~200g / m 2 Most preferably 90 g / m 2 ~150g / m 2 In this specification, the term basis weight of a fibrous substrate refers to the specific surface density of the fibrous substrate (e.g., paper or cardboard) of a fibrous reinforcing band.

[0091] In one embodiment of use, the fiber reinforcement 40 is provided in the form of two fiber reinforcement bands, and the basis weight of one fiber base material of each fiber reinforcement band is 40 g / m². 2 ~175g / m 2 Preferably 45 g / m² 2 ~100g / m 2 Most preferably 45 g / m 2 ~75g / m 2 That is the case.

[0092] In one embodiment of use, the fiber reinforcement 40 is provided in the form of three or more fiber reinforcement bands, and the area density of the combination of fiber base materials of the fiber reinforcement bands is 80 g / m². 2 ~350g / m 2 Preferably 90 g / m 2 ~200g / m 2 Most preferably 90 g / m2 ~150g / m 2 That is the case.

Claims

1. A pouch (10), A first wall (18) made of fiber material (11) and a second wall (19) made of fiber material (11), the first wall (18) and the second wall (19) that define the interior (12) of the pouch (10), It comprises at least a first seam (21) that closes the interior (12), The first joint (21) is The first part (18a) of the first wall (18), The first portion (19a) of the second wall (19), and The fiber reinforcement (40) is included, and the fiber reinforcement (40), the first portion (18a) of the first wall (18), and the first portion (19a) of the second wall (19) are joined to each other to form the first joint (21). The pouch (10) includes a hole (30) that penetrates the first seam (21), The hole (30) is positioned between a part of the fiber reinforcing material (40) and the interior (12). The fiber reinforcing material (40) includes paper or cardboard. The fibrous material (11) includes paper, The first seam (21) is the total width (W) of the pouch (10). １０ It extends in the first direction (D1) over the following: The intersecting direction (CD) of the fibrous material (11) of the first wall (18) is parallel to the first direction (D1), A pouch (10) in which the intersecting direction (CD) of the fibrous material (11) of the second wall (19) is parallel to the first direction (D1).

2. The fiber reinforcing material (40) is positioned between the first portion (18a) of the first wall (18) and the first portion (19a) of the second wall (19), and is joined to the first portion (18a) of the first wall (18) and the first portion (19a) of the second wall (19). The pouch (10) according to claim 1.

3. The area density of the fiber reinforcement material (40) is equal to or greater than the weighing capacity of the fiber material (11). The pouch (10) according to claim 1 or claim 2.

4. The area density of the fiber reinforcement material (40) is at least 80 g / m². ２ Preferably at least 100 g / m ２ That is, A pouch (10) according to any one of claims 1 to 3.

5. The area density of the fiber reinforcing material (40) is 80 g / m². ２ ~350g / m ２ For example, 100 g / m ２ ~200g / m ２ That is, The pouch (10) according to claim 4.

6. The basis weight of the fiber material (11) is at least 40 g / m ２ , preferably at least 70 g / m ２ and is A pouch (10) according to any one of claims 1 to 5.

7. The basis weight of the fiber material (11) is 40 g / m². ２ ~160g / m ２ For example, 70 g / m ２ ~90g / m ２ That is, The pouch (10) according to claim 6.

8. The width (W) of the fiber reinforcement material (40) is 2 mm to 10 mm. The width (W) of the fiber reinforcement material (40) is measured in a second direction (D2) perpendicular to the first direction (D1). A pouch (10) according to any one of claims 1 to 7.

9. The fiber reinforcement (40) extends beyond both sides (S1, S2) of the hole (30) in the first direction (D1); Preferably, The fiber reinforcing material (40) is the overall width (W) of the pouch (10). １０ ) extending in the first direction (D1), A pouch (10) according to any one of claims 1 to 8.

10. The aforementioned fiber reinforcing material (40) Thermally activated material (42) and Pressure-sensitive adhesive (44) At least one of the first portion (18a) of the first wall (18) and the first portion (19a) of the second wall (19) is joined by at least one of the following: Preferably, The fiber reinforcement material (40) is positioned between the first portion (18a) of the first wall (18) and the first portion (19a) of the second wall (19), and is joined to the first portion (18a) of the first wall (18) and the first portion (19a) of the second wall (19). The aforementioned fiber reinforcing material (40) Thermally activated material (42) and Pressure-sensitive adhesive (44) The first portion (18a) of the first wall (18) is joined by at least one of the following: The aforementioned fiber reinforcing material (40) Thermally activated material (42) and Pressure-sensitive adhesive (44) The pouch (10) according to any one of claims 1 to 9, which is joined to the first portion (19a) of the second wall (19) by at least one of the following.

11. The fiber reinforcing material (40) is joined to the first portion (18a) of the first wall (18) by at least a pressure-sensitive adhesive (44), The fiber reinforcement (40) is joined to the first portion (19a) of the second wall (19) by at least a thermally activated material (42). A pouch (10) according to any one of claims 2 to 10.

12. The use of a fiber reinforcement (40) to reinforce a first seam (21) of a pouch (10), wherein the pouch (10) includes a first wall (18) made of fiber material (11) and a second wall (19) made of fiber material (11), and the first seam (21) is provided with a hole (30), The hole (30) is positioned between a portion of the fiber reinforcement material (40) and the inside (12) of the pouch (10), This includes joining the fiber reinforcement material (40), the first portion (18a) of the first wall (18), and the first portion (19a) of the second wall (19) together to form the first joint (21) and close the interior (12), The fiber reinforcing material (40) includes paper or cardboard, The fibrous material (11) includes paper, The first seam (21) is the total width (W) of the pouch (10). １０ It extends in the first direction (D1) over the following: The intersecting direction (CD) of the fibrous material (11) of the first wall (18) is parallel to the first direction (D1), The use is such that the intersecting direction (CD) of the fibrous material (11) of the second wall (19) is parallel to the first direction (D1).

13. The fiber reinforcing material (40) is placed between the first portion (18a) of the first wall (18) and the first portion (19a) of the second wall (19), The method includes joining the first portion (18a) of the first wall (18) to the fiber reinforcement material (40), and joining the first portion (19a) of the second wall (19) to the fiber reinforcement material (40) to form the first joint (21). The use described in claim 12.

14. The fiber reinforcing material (40) is provided in the form of one, two, or three or more layers of fiber reinforcing bands. The use described in claim 12 or claim 13.

15. [A] The fiber reinforcing material (40) is provided in the form of a single layer of fiber reinforcing band, The basis weight of the fiber base material of the aforementioned fiber reinforcement band is 80 g / m². ２ ~350g / m ２ is, or [B] The fiber reinforcing material (40) is provided in the form of two layers of fiber reinforcing bands, The basis weight of each fiber base material in the aforementioned fiber reinforcement band is 40 g / m². ２ ~175g / m ２ is, or [C] The fiber reinforcing material (40) is provided in the form of three or more layers of fiber reinforcing bands, The area density of the combination of fiber base materials in the aforementioned fiber-reinforced band is 80 g / m². ２ ~350g / m ２ That is, The use described in claim 14.

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