JP7606664B2 - Pouches, containers with lids and tubes - Google Patents

Description

The present invention relates to a pouch, a container with a lid, and a tube that have a storage section for storing contents.

For example, as disclosed in Patent Document 1, a through hole is formed in the upper part of the pouch, and a hanging device such as a hook is passed through the through hole, so that the pouch can be hung and displayed.

JP 2003-11990 A

When hanging multiple pouches from a hanging device as described in Patent Document 1, it is first necessary to pass the through-holes of the pouches through the tip of the hanging device, and then move the pouches along the support part of the hanging device.

The present invention aims to provide packaging such as pouches, containers with lids, and tubes that can effectively solve these problems.

The present invention provides a pouch having a storage section formed by joining a first packaging material located on a first surface side and a second packaging material located on a second surface side,
A first region overlapping the storage portion in a plan view;
a second region including a seal portion that is located between the storage portion and an outer edge of the pouch in a plan view and joins the first packaging material and the second packaging material;
a hole located in the second region and penetrating the first packaging material and the second packaging material;
a communication portion extending from the hole to an outer edge of the pouch and penetrating the first packaging material and the second packaging material;
the first packaging material includes at least one layer located in both the first region and the second region;
the second packaging material includes at least one layer located in both the first region and the second region;
The contour of the communication portion from the hole to the outer edge of the pouch includes a first line and a second line,
The communicating portion is a pouch comprising: a first portion including a portion where the distance between the first line and the second line narrows from the outer edge of the pouch toward the hole; and a second portion located between the first portion and the hole and including a portion where the distance between the first line and the second line is 2.0 mm or less.

In the pouch according to the present invention, the first line and the second line may not be in contact with each other in the second portion of the communication section.

In the pouch according to the present invention, the first line and the second line may be at least partially in contact with each other in the second portion of the communication section.

In the pouch according to the present invention, the portion where the first line and the second line do not contact may be longer than the portion where the first line and the second line contact.

In the pouch according to the present invention, a test piece including at least the first packaging material and the second packaging material, cut out from the area of the second region where the hole is located, may have an average bending stiffness in the machine direction of 15 g·cm ² /cm or more.

In the pouch according to the present invention, the second region may include an outer edge side seal portion that extends along the outer edge of the pouch, a storage section side seal portion that contacts the storage section in a plan view, and a reinforcing portion that is positioned between the outer edge side seal portion and the storage section side seal portion so as to surround the hole and is thicker than the outer edge side seal portion and the storage section side seal portion.

In the pouch according to the present invention, the reinforcing portion may include a reinforcing material located between the first packaging material and the second packaging material.

The present invention provides a container with a lid in which a first packaging material constituting a lid and a second packaging material constituting a container are joined to seal a storage section,
A first region overlapping the storage portion in a plan view;
a second region including a seal portion located between the storage portion and the lid and an outer edge of the container in a plan view, the seal portion joining the first packaging material and the second packaging material;
a hole located in the second region and penetrating the first packaging material and the second packaging material;
a communication portion extending from the hole to an outer edge of the lid and the container and penetrating the first packaging material and the second packaging material;
the first packaging material includes at least one layer located in both the first region and the second region;
the second packaging material includes at least one layer located in both the first region and the second region;
a contour of the communication portion from the hole to the outer edge of the lid and the container includes a first line and a second line;
The communicating portion is a lidded container comprising: a first portion including a portion where the distance between the first line and the second line narrows from the outer edge of the lid and the container toward the hole; and a second portion located between the first portion and the hole and including a portion where the distance between the first line and the second line is 2.0 mm or less.

In the lidded container according to the present invention, a test piece cut out from the area of the second region where the hole is located and containing at least the first packaging material and the second packaging material may have an average bending stiffness in the machine direction of 15 g·cm ² /cm or more.

The present invention relates to a tube having a storage section formed by joining a first packaging material located on a first surface side and a second packaging material located on a second surface side,
A first region overlapping the storage portion in a plan view;
a second region including a seal portion located between the housing portion and an outer edge of the tube in a plan view and joining the first packaging material and the second packaging material;
a hole located in the second region and penetrating the first packaging material and the second packaging material;
a communication portion extending from the hole to an outer edge of the lid and the container and penetrating the first packaging material and the second packaging material;
the first packaging material includes at least one layer located in both the first region and the second region;
the second packaging material includes at least one layer located in both the first region and the second region;
a contour of the communication portion from the hole to the outer edge of the tube includes a first line and a second line;
The communicating portion is a tube comprising: a first portion including a portion where the distance between the first line and the second line narrows from the outer edge of the tube toward the hole; and a second portion located between the first portion and the hole and including a portion where the distance between the first line and the second line is 2.0 mm or less.

In the tube according to the present invention, a test piece cut out from the area of the second region where the hole is located and containing at least the first packaging material and the second packaging material may have an average bending stiffness in the machine direction of 15 g·cm ² /cm or more.

The present invention provides packaging such as pouches, containers with lids, and tubes that are easy to insert into a hanging device and are unlikely to fall off when hung.

1 is a front view showing a pouch in an embodiment as viewed from a first surface side. FIG. 1 is a rear view showing the pouch in the embodiment as viewed from the second surface side. FIG. 1B is an enlarged front view showing an area surrounded by a two-dot chain line and marked with the reference character A in FIG. 1A. 1B is a cross-sectional view showing the pouch cut along line BB in FIG. 1A. FIG. 1 is a diagram showing a method for measuring the bending stiffness of a test piece cut out from a pouch. FIG. 1 is a diagram showing a method for measuring the bending stiffness of a test piece cut out from a pouch. FIG. 2 is a cross-sectional view showing an example of a packaging material constituting a pouch. FIG. 2 is a cross-sectional view showing an example of a packaging material constituting a pouch. FIG. 1 is a diagram showing an example of a method for manufacturing a pouch. 1B is a front view showing a state in which the storage section of the pouch shown in FIG. 1A is sealed. FIG. FIG. 2 is a rear view showing a state in which the storage portion of the pouch shown in FIG. 1B is sealed. FIG. 13 is a diagram showing a state in which a plurality of pouches are hung from a hanging device. 13A and 13B are diagrams showing an example of an operation for hanging a pouch from a hanging tool. 13A and 13B are diagrams showing an example of an operation for hanging a pouch from a hanging tool. 13 is a front view showing a modified example of the communication portion formed in the second region. FIG. 13 is a front view showing a modified example of the communication portion formed in the second region. FIG. 13 is a front view showing a modified example of the communication portion formed in the second region. FIG. FIG. 11 is a front view showing a modified example of a hole formed in the second region. FIG. 11 is a front view showing a modified example of a hole formed in the second region. FIG. 11 is a front view showing a modified example of a hole formed in the second region. FIG. 11 is a front view showing a modified example of a hole formed in the second region. FIG. 11 is a front view showing a modified example of a hole formed in the second region. FIG. 11 is a front view showing a modified example of a hole formed in the second region. FIG. 11 is a front view showing a modified example of a hole formed in the second region. 22 is a diagram showing a state in which a pouch having the hole shown in FIG. 21 is hung from a hanger. 13 is a front view showing a modified example of a hole and a communication portion formed in the second region. FIG. 13 is a front view showing a modified example of a hole and a communication portion formed in the second region. FIG. FIG. 11 is a cross-sectional view showing a modified example of a reinforcing material. 26A to 26C are diagrams showing an example of a method for manufacturing a pouch having the reinforcing material shown in FIG. 25. FIG. 13 is a front view showing a modified example of the reinforcing portion. FIG. 13 is a front view showing a modified example of the pouch. FIG. 13 is a front view showing a modified example of the pouch. 30 is a front view showing a state in which the storage section of the pouch shown in FIG. 29 is sealed. FIG. FIG. 13 is a front view showing a modified example of the pouch. FIG. 13 is a front view showing a modified example of the pouch. 33 is a cross-sectional view showing the pouch cut along line CC in FIG. 32. FIG. 13 is a front view showing a modified example of the pouch. 35 is a cross-sectional view showing the pouch cut along line DD in FIG. 34. FIG. 13 is a front view showing a modified example of the pouch. FIG. 13 is a front view showing a modified example of the pouch. FIG. 13 is a perspective view showing a modified example of the hanging tool. FIG. 13 is a cross-sectional view showing a modified example of the support portion of the hanging device. FIG. 13 is a cross-sectional view showing a modified example of the support portion of the hanging device. FIG. 13 is a perspective view showing a modified example of the hanging tool. FIG. 2 is a plan view showing an example of a lidded container having a hole and a communicating portion. 43 is a cross-sectional view showing the lidded container cut along line EE in FIG. 42. 44 is an enlarged cross-sectional view showing the first edge seal portion and the storage portion of the lidded container of FIG. 43. A cross-sectional view showing a modified example of the second packaging material for a container with a lid. FIG. 2 is a front view showing an example of a tube having a hole and a communicating portion. 47 is a cross-sectional view showing the tube cut along line FF in FIG. 46. FIG. 1 shows a method for measuring the maximum load that a package can withstand. FIG. 13 is a diagram showing the measurement results of the maximum load. FIG. 1 is a diagram showing the results of evaluation by panelists.

One embodiment of the present invention will be described with reference to Figures 1 to 11B. Note that in the drawings attached to this specification, the scale and aspect ratios have been appropriately altered and exaggerated from those of the actual objects for the sake of ease of illustration and understanding.

In addition, terms used in this specification that specify shapes, geometric conditions, and their degrees, such as "parallel," "orthogonal," and "same," as well as values of length and angle, are not to be bound by strict meanings, but are to be interpreted to include the range within which similar functions can be expected.

Figure 1 is a front view of pouch 10 as viewed from first surface 1. Figure 1B is a rear view of pouch 10 as viewed from second surface 2, which is located on the opposite side of first surface 1. Figures 1A and 1B show pouch 10 in a state before it is filled with contents, i.e., in a state where no contents are contained. In this embodiment, the concept of a pouch includes not only a pouch in a state where no contents are contained, but also a pouch in a state where contents are contained.

The pouch 10 has a storage section 8 for storing the contents. The storage section 8 is a space located between the first packaging material constituting the first surface 1 and the second packaging material constituting the second surface 2. The storage section 8 is defined by the first packaging material, the second packaging material, and a seal section where the first packaging material and the second packaging material are joined. In the front and back views of the pouch 10 such as Figures 1A and 1B, as well as the plan view of the lidded container described below and the front view of the tube described below, the seal section is shaded with diagonal lines. As shown in Figure 1A, when viewed along the normal direction of the first packaging material constituting the first surface 1, the storage section 8 is formed inside the seal section. In the following description, viewing a package such as a pouch, a lidded container, or a tube along the normal direction of the first packaging material is also simply referred to as a plan view.

The above-mentioned terms "first packaging material" and "second packaging material" merely divide the packaging materials according to their positional relationships, and the method of providing the packaging materials when manufacturing the pouch 10 is not limited by the above-mentioned terms. For example, the pouch 10 may be manufactured using one sheet of packaging material in which the first packaging material and the second packaging material are adjacent to each other, or may be manufactured using a total of two sheets of packaging material, one sheet of the first packaging material and one sheet of the second packaging material.

In the following description, the area of the package that overlaps with the storage section 8 in a plan view is referred to as the first area 19. The area that is located between the storage section 8 and the outer edge of the package and includes the seal that joins the first packaging material and the second packaging material is referred to as the second area 20.

The contents stored in the storage section 8 of the package, which may be a pouch, a container with a lid, or a tube, are not particularly limited. The storage section 8 of the package can store various types of contents, such as liquids, powders, granules, and solids. The contents may be food or non-food.

<Pouch shape>
The shape of the pouch 10 will now be described. In the example shown in Figures 1A and 1B, the outer edge of the pouch 10 is rectangular. The concept of a rectangle includes not only a shape having corners, but also a shape in which each corner is chamfered to form an outwardly convex arc or curved shape.

The outer edge of the pouch has a first edge 11, a second edge 12 that faces the first edge 11 in the first direction D1, and a third edge 13 and a fourth edge 14 that extend between the first edge 11 and the second edge 12. The third edge 13 and the fourth edge 14 may face each other in a second direction D2 that is perpendicular to the first direction D1. The first edge 11 may be located on the upper side when the pouch 10 is hung. In this case, the first direction D1 is the up-down direction, and the second direction D2 is the horizontal direction.

<Sealing section>
The sealed portion will be described. The sealed portion of the second region 20 of the pouch 10 shown in Figures 1A and 1B includes a first edge seal portion 21 extending along the first edge 11, a third edge seal portion 23 extending along the third edge 13, and a fourth edge seal portion 24 extending along the fourth edge 14. The first edge seal portion 21, the third edge seal portion 23, and the fourth edge seal portion 24 may or may not be in contact with the outer edge of the pouch 10 in a plan view. In Figures 1A and 1B, the portion below the dashed line at the bottom of the pouch 10 is a second edge seal planned portion 22b that is planned to become the second edge seal portion 22.

<Easy-to-open means>
The sealed portion of the pouch 10 may be provided with easy-opening means 15 for tearing the packaging material constituting the pouch to open the pouch 10. For example, as shown in Figures 1A and 1B, the easy-opening means 15 may include a notch 15a extending from the third edge 13 in the second direction D2 and penetrating the third edge seal portion 23. The easy-opening means 15 may include a half-cut line formed in the third edge seal portion 23 by laser processing, a cutter, or the like. The easy-opening means 15 may be formed on the fourth edge 14 side.

<Holes and communicating parts>
The pouch 10 is provided with a hole 4 located in the second region 20 and penetrating the first packaging material and the second packaging material. In the example shown in Figures 1A and 1B, the hole 4 is located in the second region 20 between the first edge 11 of the pouch 10 and the storage portion 8. The hole 4 is a portion for inserting a support portion of a hanging device, which will be described later. In the example shown in Figures 1A and 1B, the outline of the hole 4 is circular.

The pouch 10 also includes a communication portion 5 that extends from the hole 4 to the outer edge of the pouch 10 and penetrates the first packaging material and the second packaging material. In the example shown in Figures 1A and 1B, the communication portion 5 extends from the portion of the hole 4 that is closest to the first edge 11 to the first edge 11. The communication portion 5 allows the support portion of the hanging device, which will be described later, to pass from the first edge 11 side to the hole 4 side. In other words, the communication portion 5 can connect the first edge 11 and the hole 4.

As shown in Figures 1A and 1B, the contour of the communication portion 5 from the hole 4 to the outer edge of the pouch 10 includes a first line 5x and a second line 5y. In the example shown in Figures 1A and 1B, the first line 5x and the second line 5y are not in contact. Such a communication portion 5 is obtained by punching out a portion of the second region 20 located between the outer edge of the pouch 10 and the hole 4 using a punching die. In this case, the communication portion 5 is also called a notch.

2 is an enlarged front view of the area surrounded by the two-dot chain line marked with the symbol A in FIG. 1A. As shown in FIG. 2, the communication portion 5 is divided into a first portion 5a located on the first edge 11 side, and a second portion 5b located between the first portion 5a and the hole 4. In FIG. 2, the symbol W indicates the distance between the first line 5x and the second line 5y. The distance W is the distance between the first line 5x and the second line 5y in a direction perpendicular to the direction in which the intermediate line 5z that passes between the first line 5x and the second line 5y extends.

The second portion 5b includes a portion where the spacing W is 2.0 mm or less. For example, the second portion 5b is defined as the portion of the communication portion 5 that extends from the position where the spacing W is 2.0 mm to the hole 4. In this case, the first portion 5a is defined as the portion of the communication portion 5 where the spacing W exceeds 2.0 mm.

2, the first portion 5a may include a portion in which the interval W narrows from the first edge 11 toward the hole 4. For example, the first line 5x of the first portion 5a may include a straight line inclined with respect to the intermediate line 5z so as to approach the intermediate line 5z from the first edge 11 toward the hole 4. The second line 5y of the first portion 5a may also include a straight line inclined with respect to the intermediate line 5z so as to approach the intermediate line 5z from the first edge 11 toward the hole 4. The straight line inclined with respect to the intermediate line 5z may extend to the second portion 5b. For example, the straight line inclined with respect to the intermediate line 5z may reach the hole 4. In this case, the second portion 5b also includes a portion in which the interval W narrows from the first edge 11 toward the hole 4.

In FIG. 2, the symbol W1 indicates the distance between the first line 5x and the second line 5y at the position where the first portion 5a connects to the first edge 11. The symbol W2 indicates the distance between the first line 5x and the second line 5y at the position where the second portion 5b connects to the hole 4. The distance W1 is greater than the distance W2.

The interval W1 is set so that the hanging device from which the pouch 10 is suspended can easily enter the communication portion 5. The interval W1 is, for example, 2.0 mm or more, and may be 3.0 mm or more, or 4.0 mm or more. On the other hand, if the interval W1 is too large, the area of the second region 20 located between the first edge 11 and the hole 4 becomes small, and deformation of the second region 20 becomes likely to occur. Taking this into consideration, the interval W1 may be 10.0 mm or less, 8.0 mm or less, or 6.0 mm or less.

The interval W2 is set so as to prevent the hanging tool inserted in the hole 4 from passing through the communication part 5 due to the weight of the pouch 10. The interval W2 is, for example, 2.0 mm or less, and may be 1.5 mm or less, 1.0 mm or less, or 0.5 mm or less. By setting the interval W2 to 2 mm or less, the second region 20 facing the second portion 5b and in contact with the hanging tool is twisted, preventing the hanging tool from passing through the communication part 5.

As shown in FIG. 2, the first line 5x and the second line 5y may include a curved portion 5c. The curved portion 5c may constitute the first line 5x and the second line 5y at the position where the first portion 5a connects to the first edge 11. The curved portion 5c is curved so as to be convex toward the first edge 11. By providing such a curved portion 5c, it becomes easier for the hanging tool to enter the communication portion 5.

The radius of curvature R of the curved portion 5c at the position where the first portion 5a connects to the first edge 11 is, for example, 3.0 mm or more, may be 4.0 mm or more, or may be 5.0 mm or more. Also, the radius of curvature R of the curved portion 5c at the position where the first portion 5a connects to the first edge 11 may be 10.0 mm or less, may be 8.0 mm or less, or may be 6.0 mm or less.

2, the symbols L1 and L2 respectively indicate the lengths of the first portion 5a and the second portion 5b in the direction in which the intermediate line 5z extends. As shown in FIG. 2, the length L1 of the first portion 5a may be greater than the length L2 of the second portion 5b. For example, the length L1 of the first portion 5a may be greater than 1.0 times the length L2 of the second portion 5b, may be 1.1 times or more, may be 1.2 times or more, or may be 1.5 times or more. Alternatively, although not shown, the length L1 of the first portion 5a may be less than the length L2 of the second portion 5b. For example, the length L1 of the first portion 5a may be less than 1.0 times the length L2 of the second portion 5b, may be 0.9 times or less, may be 0.8 times or less, or may be 0.6 times or less.

When the pouch 10 is hung from a hanging device, the peripheral portion of the hole 4 and the communicating portion 5 of the packaging material constituting the pouch 10 receives a reaction force from the hanging device due to the pouch 10's own weight. If the strength of the packaging material is weaker than the force received from the hanging device, the packaging material may deform or crack, causing the pouch 10 to fall from the hanging device. In consideration of such problems, the second region 20 of the pouch 10 may include a reinforcing portion 21a.

<Reinforcement section>
1A and 1B, two dashed lines extending in the second direction D2 at the upper part of the pouch 10 indicate the upper and lower ends of the reinforcing portion 21a. The reinforcing portion 21a is located in the first edge seal portion 21 in which the hole 4 is formed. By providing the reinforcing portion 21a, the strength of the pouch 10 around the hole 4 and the communicating portion 5 can be increased. This can suppress the occurrence of deformation, cracks, and the like in the pouch 10.

As shown in Figures 1A and 1B, the reinforcing portion 21a may be located between the outer edge side seal portion 21b and the storage section side seal portion 21c. The outer edge side seal portion 21b is a seal portion that spreads along the first edge 11 of the pouch 10. The outer edge side seal portion 21b may or may not be in contact with the first edge 11 in a plan view. The storage section side seal portion 21c is a seal portion that is in contact with the storage section 8 in a plan view. The reinforcing portion 21a, the outer edge side seal portion 21b, and the storage section side seal portion 21c constitute the first edge seal portion 21.

The reinforcing portion 21a surrounds the hole 4 in a plan view. As shown in Figures 1A and 1B, the reinforcing portion 21a may extend in the second direction D2 to reach the third edge 13 and the fourth edge 14.

Figure 3 is a cross-sectional view showing the second region 20 of the pouch cut along line B-B in Figure 1A. As shown in Figure 3, the reinforcing portion 21a is thicker than the outer edge side seal portion 21b and the storage section side seal portion 21c. The difference between the thickness T3 of the reinforcing portion 21a and the thickness T4 of the outer edge side seal portion 21b and the thickness T5 of the storage section side seal portion 21c is, for example, 50 μm or more, may be 70 μm or more, or may be 100 μm or more.

3, the reinforcing portion 21a may include a reinforcing material 55 located between the inner surface of the first packaging material 30A constituting the first surface 1 and the inner surface of the second packaging material 30B constituting the second surface 2. On the other hand, in the outer edge side seal portion 21b and the storage section side seal portion 21c, the inner surface of the first packaging material 30A and the inner surface of the second packaging material 30B may be joined. In this case, the thickness T3 of the reinforcing portion 21a can be made larger than the thickness T4 of the outer edge side seal portion 21b and the thickness T5 of the storage section side seal portion 21c by the thickness of the reinforcing material 55. The "inner surface" refers to the surface of the packaging material such as the first packaging material 30A or the second packaging material 30B that is located on the storage section 8 side.

As shown in FIG. 3, the first packaging material 30A may include a first base material layer 51 and a first sealant layer 61 located on the inner surface side of the first base material layer 51. The second packaging material 30B may include a second base material layer 52 and a second sealant layer 62 located on the inner surface side of the second base material layer 52. In the outer edge side seal portion 21b and the storage section side seal portion 21c, the first sealant layer 61 of the first packaging material 30A and the second sealant layer 62 of the second packaging material 30B may be joined together. For example, the first sealant layer 61 and the second sealant layer 62 may be integrated by a heat sealing process.

In the reinforcing portion 21a, the first sealant layer 61 of the first packaging material 30A and the second sealant layer 62 of the second packaging material 30B may be joined to the reinforcing material 55. For example, the first sealant layer 61, the reinforcing material 55, and the second sealant layer 62 may be integrated by a heat sealing process. Alternatively, the first sealant layer 61 and the reinforcing material 55 may not be joined. Also, the second sealant layer 62 and the reinforcing material 55 may not be joined. Even in this case, since the reinforcing portion 21a is sandwiched between the outer edge side seal portion 21b and the storage portion side seal portion 21c in a plan view, the distance between the inner surface of the first packaging material 30A and the inner surface of the second packaging material 30B in the reinforcing portion 21a can be limited to a predetermined range.

As a material for the reinforcing material 55 of the type bonded to the first sealant layer 61 and the second sealant layer 62, the material described below as an example of the first sealant layer 61 can be used. As a material for the reinforcing material 55 of the type not bonded to the first sealant layer 61 and the second sealant layer 62, a film or sheet made of polyethylene terephthalate, polybutylene terephthalate, polypropylene, or the like, paper, or the like can be used. The thickness of the reinforcing material 55 is, for example, 50 μm or more, may be 70 μm or more, or may be 100 μm or more. In addition, the thickness of the reinforcing material 55 may be 1000 μm or less, 500 μm or less, or 300 μm or less.

<Strength of the second region>
Next, preferred mechanical properties of the second region 20 in which the holes 4 are formed will be described. Preferably, the region of the second region 20 in which the holes 4 are located has a predetermined bending stiffness in at least one direction. For example, it is preferable that the average bending stiffness is 15 g·cm ² /cm or more. It is also preferable that the initial bending stiffness is 22 g·cm ² /cm or more.

Bending stiffness is a parameter that indicates the stiffness of a film. Below, we will explain how to measure bending stiffness with reference to Figures 4 and 5.

When measuring bending stiffness, first, a test piece 80 is cut out from a region of the second region 20 that has the same layer structure as the region in which the hole 4 is located. The shape of the test piece 80 is a square with a side length M1 as shown in FIG. 4. The length M1 is 10 mm. The direction of the sides of the test piece 80 is set according to the direction of bending stiffness to be measured. For example, when measuring bending stiffness in the second direction D2, which is the flow direction of the pouch 10 shown in FIG. 1A, the test piece 80 includes a side that extends parallel to the second direction D2.

Next, as shown in FIG. 4, the first clamp 86 and the second clamp 87 of the measuring device 85 are used to grip opposing edges of the test piece 80. When measuring the bending stiffness in the second direction D2, the test piece 80 is gripped so that the edge of the test piece 80 extending in the second direction D2 extends from the first clamp 86 to the second clamp 87. The distance M3 between the first clamp 86 and the second clamp 87 is 10 mm.

Then, the first clamp 86 is tilted relative to the second clamp 87 so as to bend the test piece 80. Based on the bending moment generated in the test piece 80 at this time, the initial bending stiffness and average bending stiffness of the test piece 80 can be calculated. The initial bending stiffness is the bending moment generated in the test piece 80 when the test piece 80 is bent from a flat state. The average bending stiffness is the average value of the bending moment generated in the test piece 80 during one process of bending the test piece 80 from a flat state until the curvature of the test piece 80 becomes the set curvature. The set curvature is 2.5/cm. The rate of change of the curvature is 0.1/cm·s.

The initial bending stiffness and average bending stiffness are measured for each of the five test pieces 80, and the average values are used as the initial bending stiffness and average bending stiffness in this embodiment.

The average bending stiffness of the test piece 80 in the machine direction is preferably 15 g·cm ² /cm or more, and may be 20 g·cm ² /cm or more, 25 g·cm ² /cm or more, or 30 g·cm ² /cm or more. On the other hand, if the average bending stiffness is too large, the manufacturability and handling of the pouch 10 are reduced. In consideration of this point, the average bending stiffness of the test piece 80 in the machine direction may be 50 g·cm ² /cm or less, 45 g·cm ² /cm or less, 40 g·cm ² /cm or less, or 35 g·cm ² /cm or less.

The average bending stiffness of the test piece 80 in the vertical direction perpendicular to the flow direction is preferably 16 g· ^cm2 /cm or more, and may be 18 g· ^cm2 /cm or more, 20 g· ^cm2 /cm or more, or 22 g· ^cm2 /cm or more. The average bending stiffness of the test piece 80 in the vertical direction may be 40 g· ^cm2 /cm or less, 35 g· ^cm2 /cm or less, 30 g· ^cm2 /cm or less, or 25 g· ^cm2 /cm or less.

The initial bending stiffness of the test piece 80 in the machine direction is preferably 22 g· ^cm2 /cm or more, may be 25 g· ^cm2 /cm or more, may be 30 g· ^cm2 /cm or more, or may be 40 g· ^cm2 /cm or more. The initial bending stiffness of the test piece 80 in the machine direction may be 70 g· ^cm2 /cm or less, may be 60 g· ^cm2 /cm or less, may be 50 g· ^cm2 /cm or less, or may be 45 g· ^cm2 /cm or less.

The initial bending stiffness of the test piece 80 in the vertical direction is preferably 23 g·cm ² /cm or more, may be 25 g·cm ² /cm or more, may be 28 g·cm ² /cm or more, or may be 30 g·cm ² /cm or more. The initial bending stiffness of the test piece 80 in the vertical direction may be 70 g·cm ² /cm or less, may be 60 g·cm ² /cm or less, may be 50 g·cm ² /cm or less, or may be 40 g·cm ² /cm or less.

The bending stiffness can be measured using a pure bending property tester JTC-911BT manufactured by SMT Corporation. The bending stiffness is measured in an environment with a temperature of 25°C and a relative humidity of 50%.

According to this embodiment, by providing the reinforcing portion 21a including the reinforcing material 55 in the second region 20, the bending stiffness of the region of the second region 20 where the hole 4 is located can be increased. This makes it possible to prevent the region around the hole 4 and the communicating portion 5 from deforming, which would cause the pouch 10 to fall from the hanging device.

(Packaging materials)
Next, the first packaging material 30A and the second packaging material 30B will be described in detail.

The first packaging material 30A includes at least one layer located in both the first region 19 and the second region 20. For example, as shown in FIG. 3, the first substrate layer 51 and the first sealant layer 61 of the first packaging material 30A are located in both the first region 19 and the second region 20.

Like the first packaging material 30A, the second packaging material 30B also includes at least one layer located in both the first region 19 and the second region 20. For example, as shown in FIG. 3, the second substrate layer 52 and the second sealant layer 62 of the second packaging material 30B are located in both the first region 19 and the second region 20.

The layer structure of the first packaging material 30A and the second packaging material 30B will be described in detail. Figure 6 is a cross-sectional view showing an example of the layer structure of the first packaging material 30A.

As shown in FIG. 6, the first packaging material 30A includes at least a first base material layer 51 and a first sealant layer 61 located on the inner surface side of the first base material layer 51. The first packaging material 30A may include a first adhesive layer 65 for adhering the first base material layer 51 to other layers such as the first sealant layer 61.

The material constituting the first base layer 51 may be a polyester film such as polyethylene terephthalate or polybutylene terephthalate, a polyamide film such as nylon, a plastic film such as polypropylene, or paper. The plastic film of the first base layer 51 is preferably biaxially stretched.

When the first base layer 51 includes a plastic film, the thickness of the first base layer 51 is, for example, 10 μm or more and 50 μm or less. The basis weight of the paper of the first base layer 51 is, for example, 20 g/ ^m2 or more and 100 g/m2 ^or less.

The material for the first sealant layer 61 may be a polyolefin resin such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-propylene block copolymer, or propylene-ethylene block copolymer. The first sealant layer 61 may include an unstretched sealant film.

The thickness of the first sealant layer 61 may be 15 μm or more, or 18 μm or more. The thickness of the first sealant layer 61 may be 80 μm or less, 60 μm or less, 40 μm or less, or 30 μm or less.

The first adhesive layer 65 may be an adhesive layer or an adhesive resin layer. The adhesive layer may be formed by a conventionally known method, such as a dry lamination method. The adhesive resin layer includes a thermoplastic resin. The adhesive resin layer may be formed by a conventionally known method, such as a melt extrusion lamination method or a sand lamination method.

Figure 7 is a cross-sectional view showing another example of the layer structure of the first packaging material 30A. As shown in Figure 7, the first packaging material 30A may further include a first additional layer 53. The first packaging material 30A may also include a third adhesive layer 67 for adhering the first additional layer 53 to other layers.

The first additional layer 53 is a layer that is provided to impart certain properties to the first packaging material 30A. For example, the first additional layer 53 may include the plastic film given as an example of the first base layer 51. In this case, the first additional layer 53 can increase the strength of the first packaging material 30A. The material of the plastic film of the first additional layer 53 may be the same as or different from the material of the plastic film of the first base layer 51.

The first additional layer 53 may also contain a metal foil such as aluminum. This can improve the gas barrier properties and light blocking properties of the first packaging material 30A. The first additional layer 53 may also contain a resin layer having gas barrier properties, such as ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride resin (PVDC), or aromatic polyamide such as nylon MXD6.

The first additional layer 53 may be located between the first base layer 51 and the first sealant layer 61, as shown in FIG. 7. Alternatively, although not shown, the first additional layer 53 may be located on the outer surface side of the first base layer 51.

The third adhesive layer 67, like the first adhesive layer 65, may be an adhesive layer or an adhesive resin layer.

The first packaging material 30A may include a printing layer. The printing layer is a layer that forms any desired printed pattern, such as letters, numbers, pictures, figures, symbols, designs, etc., for decoration, display of contents, display of expiration date, display of manufacturer, seller, etc., or for the purpose of adding aesthetic appeal. The printing layer is formed from printing ink containing a binder and a pigment.

The plastic film included in the first packaging material 30A may have a vapor deposition layer of a metal such as aluminum, a metal oxide such as aluminum oxide, or an inorganic oxide such as silicon oxide. The vapor deposition layer may be laminated on the first base layer 51, the first sealant layer 61, or the first additional layer 53.

Each layer of the first packaging material 30A is laminated using a method such as dry lamination or melt extrusion. The first packaging material 30A may also include additional layers not shown.

The second packaging material 30B includes at least a second base material layer 52 and a second sealant layer 62 located on the inner surface side of the second base material layer 52. The second packaging material 30B may include a second base material layer 52, a second adhesive layer 66, and a second sealant layer 62 arranged from the outer surface side to the inner surface side, similar to the first packaging material 30A shown in FIG. 6. The second base material layer 52, the second adhesive layer 66, and the second sealant layer 62 of the second packaging material 30B may be made of the same material, thickness, and other configurations as the first base material layer 51, the first adhesive layer 65, and the first sealant layer 61 of the first packaging material 30A.

The second packaging material 30B may have a second base material layer 52, a second adhesive layer 66, a second additional layer 54, a fourth adhesive layer 68, and a second sealant layer 62 arranged from the outer surface side to the inner surface side, similar to the first packaging material 30A shown in FIG. 7. The second base material layer 52, the second adhesive layer 66, the second additional layer 54, the fourth adhesive layer 68, and the second sealant layer 62 of the second packaging material 30B may have the same configurations, such as materials and thicknesses, as the first base material layer 51, the first adhesive layer 65, the first additional layer 53, the third adhesive layer 67, and the first sealant layer 61 of the first packaging material 30A.

The layer structure of the first packaging material 30A may be the same as or different from the layer structure of the second packaging material 30B. The first packaging material 30A and the second packaging material 30B are collectively referred to as packaging material 30.

The thickness of the first packaging material 30A and the second packaging material 30B is, for example, 30 μm or more, may be 40 μm or more, or may be 45 μm or more. The thickness of the first packaging material 30A and the second packaging material 30B may be 100 μm or less, may be 80 μm or less, or may be 60 μm or less.

Below are some specific examples of preferred packaging materials 30. The packaging material 30 is not limited to the specific examples below, and other configurations may also be used.
OPP (oriented polypropylene film) 20 μm / printing layer / AC / PE 10 μm / VMPET 12 μm / AC / PE 10 μm / CPP (non-oriented polypropylene film) 18 μm
・OPP20μm/Adhesive layer/VMCPP30μm
PET (polyethylene terephthalate) 12 μm / adhesive layer / VMCPP 30 μm
・OPP20μm/adhesive layer/CPP18μm
・ONY (oriented nylon film) 15 μm / PE (polyethylene film) 30 μm
・Printing layer/Paper 50μm/PE10μm/VMPET12μm/AC/PE10μm/CPP18μm
Printing layer/paper 50 μm/PE 10 μm/aluminum foil 7 μm/PE 30 μm
PET 12 μm / PE 15 μm / aluminum foil 7 μm / PE 30 μm

"AC" means an anchor coat layer. The anchor coat layer is a layer formed by applying an anchor coating agent onto a specific layer or film and drying it.
"VMPET" refers to a PET film laminated with a vapor-deposited layer of a metal such as aluminum.

<Production Method>
Next, a method for manufacturing the pouch 10 will be described. First, as shown in FIG. 6, the first packaging material 30A and the second packaging material 30B are placed opposite each other. A reinforcing material 55 is inserted between the first packaging material 30A and the second packaging material 30B to form a laminate. In this state, the laminate is heat-sealed at a predetermined sealing temperature in the regions corresponding to the first edge 11, the third edge 13, and the fourth edge 14 to form the first edge seal portion 21, the third edge seal portion 23, and the fourth edge seal portion 24. The region of the laminate overlapping with the reinforcing material 55 becomes the reinforcing portion 21a described above. The first packaging material 30A, the second packaging material 30B, and the reinforcing material 55 may be a long original roll extending in the second direction D2 of FIG. 6.

Then, the laminate is punched out using a die to form the hole 4 and the communication part 5. Furthermore, the laminate is cut in the first direction D1 at the positions that are to become the third edge 13 and the fourth edge 14. This makes it possible to obtain the pouch 10 shown in Figures 1A and 1B, which is provided with the reinforcing part 21a, the hole 4, and the communication part 5.

Then, the contents are filled into the storage section 8 of the pouch 10 through the opening 9 on the second edge 12 side. After that, the inner surface of the first packaging material 30A and the inner surface of the second packaging material 30B on the second edge 12 side are heat sealed at a predetermined sealing temperature to form the second edge seal section 22. This makes it possible to obtain a pouch 10 in which the contents are stored and sealed, as shown in Figures 9A and 9B.

<How to use>
Next, an example of a method of using the pouch 10 will be described. The figure shows a state in which a plurality of pouches 10 are hung from a hanging device 70. The hanging device 70 includes at least a support part 71 from which the pouches 10 are hung. The support part 71 is, for example, a rod, and is inserted into the hole 4 of the pouch 10.

The hanging device 70 may include a retaining portion 72 connected to one end of the support portion 71. The retaining portion 72 is inclined relative to the support portion 71 so as to be displaced upward relative to the support portion 71 as it moves away from the one end of the support portion 71. In other words, the retaining portion 72 is inclined so as to descend in the longitudinal direction toward the support portion 71. By providing the retaining portion 72, it is possible to prevent the pouch 10 from falling off the one end of the support portion 71. Reference numeral 74 denotes a boundary portion between the support portion 71 and the retaining portion 72. The support portion 71 and the retaining portion 72 may be formed by a single member that is bent so that the longitudinal direction changes at the boundary portion 74.

The hanging device 70 may have a fixing portion 73 connected to the other end of the support portion 71. The fixing portion 73 is a flat plate-like member with a predetermined thickness. The fixing portion 73 may be formed in such a manner that, when the fixing portion 73 is arranged so that its surface is parallel to the vertical direction, the support portion 71 and the retaining portion 72 both face vertically downward toward the boundary portion 74. As with conventional hanging devices, a predetermined attachment means is formed on the back surface of the fixing portion 73. This attachment means allows the fixing portion 73 to be attached to a fixture or display shelf so that the surface of the fixing portion 73 is parallel to the vertical direction.

11A and 11B are diagrams showing an example of the process of hanging the pouch 10 from the hanging device 70. This process is carried out, for example, by an employee of the store selling the pouch 10.

The employee first brings the communicating portion 5 of the pouch 10 into contact with the support portion 71 of the hanging device 70. According to this embodiment, the distance between the first line 5x and the second line 5y at the position where the first portion 5a of the communicating portion 5 connects to the first edge 11 is wide, making it easy to position the communicating portion 5 of the pouch 10 relative to the support portion 71. As shown in FIG. 11A, if there is a curved portion 5c at the position where the first portion 5a connects to the first edge 11, the support portion 71 can easily enter the first portion 5a of the communicating portion 5 along the curved portion 5c.

The employee then moves the pouch 10 upward toward the support portion 71, as shown by the arrow U in FIG. 11B. This allows the support portion 71 to pass through the communication portion 5 and reach the hole 4. The employee then releases the pouch 10. According to this embodiment, the gap between the first line 5x and the second line 5y at the position where the second portion 5b of the communication portion 5 connects to the hole 4 is narrow, so that the area of the pouch 10 around the hole 4 and the communication portion 5 is prevented from deforming, causing the pouch 10 to fall off the support portion 71.

In addition, according to this embodiment, the support part 71 can be inserted into the hole 4 through the communication part 5. Therefore, as shown by the arrow in FIG. 10, when multiple pouches 10 are hanging from the support part 71, a new pouch 10 can be attached to the support part 71 at any position. This makes it easier to adjust the order of the pouches 10 hanging from the support part 71 compared to the conventional type of pouch 10 in which the pouch 10 is attached to the support part 71 from the holding part 72 side. For example, a new pouch 10 can be placed on the fixing part 73 side of the pouches 10 already hanging from the support part 71. This makes it easier to rearrange the pouches 10, for example, by placing a pouch 10 with a short time until its expiration date on the holding part 72 side.

Next, the operation of the consumer removing the pouch 10 from the support part 71 will be described. The consumer first grasps the pouch 10 hanging from the support part 71 and moves the pouch 10 downward. This causes the support part 71 to pass through the communication part 5 of the pouch 10, and the pouch 10 is removed from the support part 71.

According to this embodiment, the consumer can easily remove one desired pouch 10 from the support part 71, compared to conventional pouches 10 that are removed from the holding part 72 side. This is particularly useful for the consumer when there are individual differences in the pouches 10. For example, consider a case where the packaging material 30 of the pouch 10 is transparent and the consumer can check the contents of the pouch 10. In this case, the consumer first checks the state of the contents of the multiple pouches 10 hanging from the support part 71. Next, the consumer removes the pouch 10 with the contents in a favorable state from the support part 71. In this way, the consumer can easily select the desired pouch 10 and remove it from the support part 71.

Note that various modifications can be made to the above-described embodiment. Below, modified examples will be described with reference to the drawings as necessary. In the following description and the drawings used in the following description, parts that can be configured similarly to the above-described embodiment will be given the same reference numerals as those used for the corresponding parts in the above-described embodiment, and duplicated descriptions will be omitted. Also, if it is clear that the effects obtained in the above-described embodiment can also be obtained in the modified example, the description may be omitted.

(Modification of the communication portion)
In the above embodiment, an example has been shown in which the first line 5x and the second line 5y of the communication portion 5 include a straight portion extending from the first portion 5a to the second portion 5b. However, this is not limited to this, and the first line 5x and the second line 5y may include a curved portion 5c extending from the first portion 5a to the second portion 5b, for example, as shown in Fig. 12. In this case, the first line 5x and the second line 5y may not include a straight portion.

(Modification of the communication portion)
In the above embodiment, an example has been shown in which the first line 5x and the second line 5y of the communication part 5 include the curved portion 5c at the position where the first portion 5a connects to the first edge 11. However, this is not limited to this, and the first line 5x and the second line 5y do not need to include the curved portion 5c. For example, as shown in Fig. 13, the first line 5x and the second line 5y may be formed of a straight line portion extending from the hole 4 to the first edge 11.

(Modification of the communication portion)
In the above embodiment, an example has been shown in which the first line 5x and the second line 5y of the communication portion 5 are not in contact with each other. That is, an example has been shown in which the communication portion 5 is a notch. However, this is not limited thereto, and as shown in FIG. 14, the first line 5x and the second line 5y may be in at least partial contact with each other in the second portion 5b of the communication portion 5. The portion in which the first line 5x and the second line 5y are in contact with each other is obtained, for example, by inserting a blade into a portion of the second region 20. Such a portion is also called a cut. In FIG. 14, the cut is indicated by the symbol 5d. The cut 5d is included in the second portion 5b.

On the first edge 11 side of the cut 5d, there is a notch 5e where the first line 5x and the second line 5y do not contact each other. The part of the notch 5e where the distance W between the first line 5x and the second line 5y is 2.0 mm or less is classified as the second part 5b. The part of the notch 5e where the distance W between the first line 5x and the second line 5y is more than 2.0 mm is classified as the first part 5a.

The symbols L3 and L4 respectively indicate the lengths of the notch 5e and the notch 5d in the direction in which the intermediate line 5z extends. As shown in FIG. 14, the length L3 of the notch 5e may be greater than the length L4 of the notch 5d. For example, the length L3 of the notch 5e may be 1.2 times or more, 1.5 times or more, or 2.0 times or more, the length L4 of the notch 5d. Alternatively, although not shown, the length L3 of the notch 5e may be less than the length L4 of the notch 5d.

(Modification of hole)
In the above embodiment, the hole 4 has a circular contour, specifically, a perfect circle. However, the hole 4 does not have to have a perfect circle contour. For example, as shown in FIG. 15 and FIG. 16, the hole 4 may have an elliptical contour. In this case, as shown in FIG. 15, the first dimension S1 of the hole 4 may be smaller than the second dimension S2 of the hole 4. Alternatively, as shown in FIG. 16, the first dimension S1 of the hole 4 may be larger than the second dimension S2 of the hole 4. The first dimension S1 is the dimension of the hole 4 in the direction in which the intermediate line 5z extends at the position where the communication portion 5 is connected to the hole 4. The second dimension S2 is the dimension of the hole 4 in the direction perpendicular to the measurement direction of the first dimension S1.

(Modification of hole)
In the above-described embodiment or modified example, the outline of the hole 4 is a circle such as a perfect circle or an ellipse. However, the outline of the hole 4 is not limited to this, and may be a polygon. For example, as shown in FIG. 17 and FIG. 18, the outline of the hole 4 may be a rectangle. In this case, as shown in FIG. 17, the communication part 5 may be connected to the middle of the sides of the rectangle that constitutes the outline of the hole 4. Or, as shown in FIG. 18, the communication part 5 may be connected to the corner of the rectangle that constitutes the outline of the hole 4. A corner is a part where two sides that constitute a polygon such as a rectangle intersect. Also, as shown in FIG. 19, the outline of the hole 4 may be a triangle. In this case, as shown in FIG. 19, the communication part 5 may be connected to the corner of the triangle that constitutes the outline of the hole 4. Or, although not shown, the communication part 5 may be connected to the middle of the sides of the triangle that constitutes the outline of the hole 4. When the outline of the hole 4 is a polygon, the corner of the polygon may include a curved part as shown in FIG. 20.

When the outline of the hole 4 is polygonal, the first dimension of the hole 4 may be smaller than the second dimension of the hole 4, or the first dimension of the hole 4 may be larger than the second dimension of the hole 4, as in the cases of Figures 15 and 16 described above. Alternatively, the first dimension of the hole 4 and the second dimension of the hole 4 may be the same.

(Modification of hole)
In the above-described embodiment, an example in which the first packaging material 30A and the second packaging material 30B are punched out and removed at the hole 4 has been shown. However, this is not limited thereto, and as shown in FIG. 21, the first packaging material 30A and the second packaging material 30B overlapping the hole 4 may remain in a state of being connected to the second region 20 around the hole 4. For example, the contour of the hole 4 may include a first contour 4x having one end connected to the first portion 5a and a second contour 4y having one end connected to the second portion 5b, and the other end of the first contour 4x and the other end of the second contour 4y may not be connected. In this case, as shown in FIG. 21, a portion 4a of the packaging material overlapping the hole 4 is connected to the second region 20 around the hole 4 via a connecting portion 4z located between the other end of the first contour 4x and the other end of the second contour 4y.

Figure 22 is a diagram showing a pouch 10 having the hole 4 shown in Figure 21 being hung from a hanging device 70. In the operation of hanging the pouch 10 from the hanging device 70, a portion 4a of the packaging material overlapping the hole 4 is pressed by the support part 71 that has passed through the communication part 5 and reached the hole 4. This allows the support part 71 to be inserted into the hole 4 as shown in Figure 22.

(Modifications of the arrangement of holes and communication parts)
In the above embodiment, an example has been shown in which the hole 4 is located at the center of the first edge seal portion 21 in the second direction D2, and the communication portion 5 extends from the hole 4 to the first edge 11. However, as long as the pouch 10 can be hung from the hanging device 70, the arrangement of the hole 4 and the communication portion 5 is not particularly limited. For example, as shown in FIG. 23, the hole 4 may be located on the third edge 13 side with respect to the center of the first edge seal portion 21 in the second direction D2. Also, the communication portion 5 may extend from the hole 4 to the third edge 13. In this case, the position where the communication portion 5 is connected to the hole 4 is easily shifted from the uppermost position of the hole 4.

If the position where the communication part 5 is connected to the hole 4 is shifted from the uppermost position of the hole 4, it is possible to prevent the support part 71 from coming into contact with the communication part 5 when the pouch 10 is hung from the hanging device 70. This makes it possible to prevent the support part 71 from passing through the communication part 5 due to the pouch 10's own weight.

(Modifications of the arrangement of holes and communication parts)
24, the first edge 11 of the pouch 10 may include a first side 11a and a second side 11b located on the side of the storage section 8 relative to the first side 11a. In the example shown in Fig. 24, both the first side 11a and the second side 11b extend in the second direction D2.

The first side 11a may be located at the center of the first edge 11 in the second direction D2. In this case, one second side 11b may be located on the third edge 13 side of the first side 11a, and the other second side 11b may be located on the fourth edge 14 side of the first side 11a. In addition, the hole 4 and the communication portion 5 may be formed in the first edge seal portion 21 located between the first side 11a of the first edge 11 and the storage portion 8.

24, the outer edge of the portion of the pouch 10 located between the first side 11a of the first edge 11 and the storage section 8 includes a third side 11c extending from the first side 11a toward the storage section 8. In this case, as shown in FIG. 24, the communication section 5 may extend from the hole 4 to the third side 11c. In the example shown in FIG. 24, the position where the communication section 5 is connected to the hole 4 can also be easily shifted from the uppermost position of the hole 4. This makes it possible to prevent the support section 71 from passing through the communication section 5 due to the weight of the pouch 10.

(Modification of Reinforcement Material)
25 is a cross-sectional view showing a modified example of the reinforcing material 55. The reinforcing material 55 may include a packaging material including at least a base layer 56 and a sealant layer 57. For example, as shown in FIG. 25, the reinforcing material 55 may include a packaging material folded so that the sealant layer 57 faces outward. The sealant layer 57 of the reinforcing material 55 located on the first packaging material 30A side and the first sealant layer 61 of the first packaging material 30A may be integrated by a heat sealing process. Similarly, the sealant layer 57 of the reinforcing material 55 located on the second packaging material 30B side and the second sealant layer 62 of the second packaging material 30B may be integrated by a heat sealing process.

In the example shown in FIG. 25, the reinforcing portion 21a includes four sheets of packaging material including a base layer and a sealant layer. Specifically, from the first surface 1 side to the second surface 2 side, the first packaging material 30A, the packaging material for the reinforcing material 55, the packaging material for the reinforcing material 55, and the second packaging material 30B are included. In this way, by providing four sheets of packaging material in the reinforcing portion 21a, the strength of the pouch 10 around the hole 4 and the communicating portion 5 can be increased.

The packaging material of the reinforcing material 55 may be the same as the first packaging material 30A or the second packaging material 30B. That is, the reinforcing material 55 may be formed using the first packaging material 30A or the second packaging material 30B. This makes it possible to efficiently manufacture the pouch 10 having the reinforcing portion 21a.

26 is a diagram showing an example of a method for manufacturing a pouch having the reinforcing material shown in FIG. 25. First, as shown in FIG. 26, the first packaging material 30A and the second packaging material 30B are placed opposite each other. In addition, a reinforcing material 55 made of a packaging material folded so that the sealant layer faces outward is inserted between the first packaging material 30A and the second packaging material 30B to form a laminate. In this state, the laminate is heat-sealed at a predetermined sealing temperature to form the first edge seal portion 21, the third edge seal portion 23, and the fourth edge seal portion 24. Next, the laminate is punched out using a punching die to form the hole 4 and the communication portion 5. Furthermore, the laminate is cut in the first direction D1 at the positions that are to become the third edge 13 and the fourth edge 14. This makes it possible to obtain a pouch 10 having the reinforcing portion 21a, the hole 4, and the communication portion 5.

25 and 26 show an example in which the reinforcing material 55 is made of a packaging material in a folded state, but this is not limiting. For example, although not shown, the reinforcing material 55 may be formed by laminating two sheets of packaging material including a base layer and a sealant layer with the sealant layer facing outward. Such two sheets of packaging material may be obtained by folding one sheet and then cutting it near the fold.

The packaging material constituting the reinforcing material 55 shown in FIG. 25 may have layers other than the base layer 56 and the sealant layer 57, similar to the first packaging material 30A and the second packaging material 30B shown in FIG. 6 and FIG. 7.

(Modifications of the Reinforcement Part)
In the above-described embodiment, an example has been shown in which the reinforcing portion 21a extends in the second direction D2 so as to reach the third edge 13 and the fourth edge 14. However, as long as the reinforcing portion 21a surrounds the hole 4, the range of the reinforcing portion 21a is not particularly limited. For example, as shown in Fig. 27, the reinforcing portion 21a does not have to reach the third edge 13 or the fourth edge 14. In this case, a seal portion where the first packaging material 30A and the second packaging material 30B are joined may be located between the reinforcing portion 21a and the third edge 13 or the fourth edge 14 in a plan view.

(Modification of pouch)
In the above-described embodiment, an example has been shown in which pouch 10 includes reinforcing portion 21a surrounding hole 4 in plan view. However, this is not limited thereto, and as shown in Fig. 28, pouch 10 does not need to include reinforcing portion 21a surrounding hole 4. Even in this case, by configuring first packaging material 30A and second packaging material 30B so that second region 20 has sufficient strength, it is possible to prevent pouch 10 from falling from the hanging device due to deformation of the peripheral regions of hole 4 and communicating portion 5.

(Modification of pouch)
In the above embodiment, the pouch 10 is a so-called four-sided sealed pouch having a seal portion at each of the first edge 11, the second edge 12, the third edge 13, and the fourth edge 14. However, the form of the pouch 10 is not limited to a four-sided sealed pouch. For example, the pouch 10 may be a so-called three-sided sealed pouch having a seal portion at three edges of the first edge 11, the second edge 12, the third edge 13, and the fourth edge 14. Fig. 29 is a front view showing a three-sided sealed pouch in a state where no contents are contained. Fig. 30 is a front view showing a three-sided sealed pouch in a state where contents are contained.

The pouch 10 shown in Figures 29 and 30 is constructed by folding back the packaging material at the fourth edge 14. In this case, the sealed portion of the pouch 10 includes a first edge seal portion 21 extending along the first edge 11, and a third edge seal portion 23 extending along the third edge 13. After the contents are filled into the storage portion 8 of the pouch 10 through the opening 9 on the second edge 12 side, a second edge seal portion 22 is formed at the second edge 12 as shown in Figure 30.

29 and 30, the first packaging material 30A constituting the first surface 1 and the second packaging material 30B constituting the second surface 2 are both composed of a single sheet of packaging material folded back at the fourth edge 14. Therefore, the layer structure of the first packaging material 30A is the same as the layer structure of the second packaging material 30B. In the example shown in FIG. 29 and 30, the first direction D1 may be the flow direction of the first packaging material 30A and the second packaging material 30B, and the second direction D2 may be a vertical direction.

(Modification of pouch)
FIG. 31 is a front view showing a modified example of the pouch 10. As shown in FIG. 31, the pouch 10 may be a gusset-type pouch configured to be self-supporting with the second edge 12 facing down. The pouch 10 includes a first packaging material 30A constituting the first surface 1, a second packaging material 30B constituting the second surface 2, and a third packaging material constituting the third surface 3 located at the second edge 12. The third packaging material is disposed between the first packaging material 30A and the second packaging material 30B in a state where it is folded back at the folded back portion 3f. In the example shown in FIG. 31, the second direction D2 may be the flow direction of the first packaging material 30A, the second packaging material 30B, and the third packaging material, and the first direction D1 may be a vertical direction.

The third packaging material constituting the third surface 3, like the first packaging material 30A and the second packaging material 30B, comprises a base layer and a sealant layer located on the inner surface side of the base layer. The second edge seal portion 22 extending along the second edge 12 is formed by joining the first sealant layer 61 of the first packaging material 30A to the sealant layer of the third packaging material, and by joining the second sealant layer 62 of the second packaging material 30B to the sealant layer of the third packaging material.

(Modification of pouch)
Fig. 32 is a front view showing one modified example of pouch 10. As shown in Fig. 32, pouch 10 may be a pillow pouch including a gable portion 7 extending in a first direction D1 from a first edge 11 to a second edge 12. In the example shown in Fig. 32, gable portion 7 is located on the first surface 1 side. Although not shown, gable portion 7 may be located on the second surface 2 side. In the example shown in Fig. 32, first direction D1 may be the flow direction of first packaging material 30A and second packaging material 30B, and second direction D2 may be a vertical direction.

Figure 33 is a cross-sectional view showing the pouch 10 cut along line CC in Figure 32. The seam 7 includes a base 7a located on the storage section 8 side, and a tip 7b located on the opposite side of the base 7a. The seam 7 is located between the base 7a and the tip 7b, and includes a seal portion where the first sealant layers 61 of the first packaging material 30A on the first surface 1 side are joined together. Although not shown, when the seam 7 is located on the second surface 2 side, the seam 7 is located between the base 7a and the tip 7b, and includes a seal portion where the second sealant layers 62 of the second packaging material 30B on the second surface 2 side are joined together.

The base 7a of the joining portion 7 may be located on the third edge 13 side or the fourth edge 14 side of the center of the pouch 10 in the second direction D2. In the example shown in FIG. 32, the base 7a of the joining portion 7 is located on the third edge 13 side of the center of the pouch 10 in the second direction D2. This prevents the joining portion 7 from overlapping with the hole 4 and the communicating portion 5. Although not shown, the base 7a of the joining portion 7 may be located in the center in the second direction D2, and the hole 4 and the communicating portion 5 may be located on the third edge 13 side or the fourth edge 14 side of the center in the second direction D2.

(Modification of pouch)
32 and 33 show an example in which the joint portion 7 does not overlap with the hole 4 and the communication portion 5. However, this is not limited thereto, and as shown in Fig. 34, the joint portion 7 may overlap with the hole 4 and the communication portion 5. In this case, it is preferable that the dimension of the joint portion 7 is larger than the dimension of the hole 4 in the second direction D2. In the example shown in Fig. 34, the first direction D1 may be the flow direction of the first packaging material 30A and the second packaging material 30B, and the second direction D2 may be a vertical direction.

As shown in FIG. 34, the base 7a of the joint portion 7 may be slightly offset from the center of the pouch 10 in the second direction D2 toward the third edge 13 or the fourth edge 14. This allows the joint portion 7 to be overlapped with the hole 4 and the communication portion 5 while the hole 4 and the communication portion 5 are positioned in the center of the first edge seal portion 21 in the second direction D2.

In FIG. 34, symbol K1 indicates the distance from the third edge 13 to the base 7a in the first direction D1. Symbol K2 indicates the distance from the fourth edge 14 to the base 7a in the first direction D1. Distance K1 is greater than distance K2. In other words, base 7a is located on the fourth edge 14 side relative to the center of the pouch 10 in the second direction D2. The difference between distance K1 and distance K2 corresponds to the dimension of hole 4. The difference between distance K1 and distance K2 is, for example, 5 mm or more and 50 mm or less.

As shown in FIG. 34, the first edge seal portion 21 does not have to include the reinforcing portion 21a. Even in this case, according to this modification, the peripheral portion of the hole 4 and the communication portion 5 of the pouch 10 can be provided with sufficient strength. The reason for this will be explained below with reference to FIG. 35. FIG. 35 is a cross-sectional view showing the pouch 10 cut along the line D-D in FIG. 34.

As shown in FIG. 35, the gable portion 7 includes two stacked sheets of the first packaging material 30A. Therefore, the periphery of the hole 4 of the pouch 10 includes, in order from the gable portion 7 side to the second surface 2 side, the two sheets of the first packaging material 30A of the gable portion 7, the first packaging material 30A constituting the first surface 1, and the second packaging material 30B constituting the second surface 2. In other words, the periphery of the hole 4 of the pouch 10 includes four sheets of packaging material including a base layer and a sealant layer. This increases the strength of the pouch 10 around the periphery of the hole 4 and the communicating portion 5.

(Modification of pouch)
Fig. 36 is a front view showing one modified example of the pouch 10. As shown in Fig. 36, the pouch 10 may be a side gusset pouch having a seam 7 and a folded portion 13f extending along the third edge 13 and a folded portion 14f extending along the fourth edge 14. In the folded portion 13f and the folded portion 14f, the same packaging material as the first packaging material 30A and the second packaging material 30B is folded. In the example shown in Fig. 34, the first direction D1 may be the flow direction of the first packaging material 30A and the second packaging material 30B, and the second direction D2 may be a vertical direction.

(Modification of pouch)
37 is a front view showing a modified example of the pouch 10. The pouch 10 may include a zipper tape 16 attached to the inner surface of the first packaging material 30A and the inner surface of the second packaging material 30B. The zipper tape 16 extends in the second direction D2 at a position on the second edge 12 side of the easy-opening means 15. The zipper tape 16 includes, for example, a convex tape attached to the inner surface of the first packaging material 30A and a concave tape attached to the inner surface of the second packaging material 30B and capable of engaging with the convex tape. By including the zipper tape 16 in the pouch 10, it becomes easier to reseal the pouch 10 after it has been opened.

(Modification of Hanging Tool)
In the above embodiment, an example has been shown in which the cross section of support portion 71 of suspender 70 is circular. However, this is not limited to this, and the cross section of support portion 71 may have other shapes.

Figure 38 is a perspective view showing a modified example of the hanging device 70. As shown in Figure 38, the support portion 71 of the hanging device 70 may include a flat surface 71f located at the top.

Figure 39 is a cross-sectional view showing the state in which the support portion 71 is inserted into the hole 4 of the pouch 10. The flat surface 71f of the support portion 71 is configured to overlap with the second portion 5b of the communication portion 5 in the vertical direction when the support portion 71 is inserted into the hole 4 of the pouch 10. Furthermore, the dimension of the flat surface 71f in the second direction D2 is greater than the distance between the first line 5x and the second line 5y at the position where the second portion 5b connects to the hole 4. By configuring the support portion 71 in this manner, it is possible to prevent the support portion 71 from passing through the communication portion 5 due to the weight of the pouch 10.

As shown in FIG. 39, the cross-sectional shape of the support part 71 may be triangular. In this case, by configuring the support part 71 so that one side of the triangle is located at the top, the flat surface 71f of the support part 71 and the second part 5b of the communication part 5 can be overlapped in the vertical direction. In the example shown in FIG. 39, the support part 71 is installed in such a state that one side of the triangular cross-section is located at the top so that it is horizontal, and one vertex opposite one side of the triangular cross-section is located at the bottom. "Horizontal" means that it is sufficient to be substantially horizontal, and is a concept that includes technical errors during manufacturing and installation.

(Modification of Hanging Tool)
Fig. 40 is a cross-sectional view showing a modified example of support part 71 of hanging device 70. As shown in Fig. 40, the cross-sectional shape of support part 71 may be hexagonal. In this case, by configuring support part 71 so that one side of the hexagon is positioned upward, flat surface 71f of support part 71 and second part 5b of communication part 5 can be overlapped in the vertical direction.

(Modification of Hanging Tool)
Fig. 41 is a perspective view showing a modified example of the hanging device 70. As shown in Fig. 41, the support portion 71 may include a flat surface 71f located at the top, and the pressing portion 72 may have a circular cross section. In this manner, the cross section of the pressing portion 72 may have a shape different from the cross section of the support portion 71. The circular cross section of the pressing portion 72 makes it easier to pass the hole 4 of the pouch 10 through the support portion 71 via the pressing portion 72. As described above, it is also possible to pass the support portion 71 directly through the hole 4 via the communication portion 5.

(Modifications of the packaging body)
In the above-described embodiment and modified example, an example has been shown in which the hole 4 and the communicating portion 5 are formed in the second region 20 of the pouch 10. However, the packaging body having the hole 4 and the communicating portion 5 is not limited to the pouch 10.

In this modified example, an example will be described in which the packaging body is a container with lid 17. FIG. 42 is a plan view showing the container with lid 17 as viewed from the side of the lid 17a. The container with lid 17 comprises a container 17b including a storage portion 8 and a flange portion 17c, and a lid 17a joined to the flange portion 17c of the container 17b.

In the example shown in FIG. 42, the outer edge of the lidded container 17, like the pouch 10, has a first edge 11, a second edge 12 that faces the first edge 11 in the first direction D1, and a third edge 13 and a fourth edge 14 that extend between the first edge 11 and the second edge 12. In other words, the outer edge of the lidded container 17 is rectangular.

The shape of the outer edge of the lidded container 17 in a plan view is not particularly limited. For example, although not shown, the shape of the outer edge of the lidded container 17 in a plan view may be circular.

Like the pouch 10, the container with lid 17 includes a seal portion where the inner surface of the first packaging material constituting the lid 17a is joined to the inner surface of the second packaging material constituting the container 17b. In the example shown in FIG. 42, the seal portion of the container with lid 17 includes a first edge seal portion 21 extending along the first edge 11, a second edge seal portion 22 extending along the second edge 12, a third edge seal portion 23 extending along the third edge 13, and a fourth edge seal portion 24 extending along the fourth edge 14.

In this modified example, as in the case of the pouch 10, the area of the lidded container 17 that overlaps with the storage section 8 in a plan view is referred to as the first area 19. Also, the area that is located between the storage section 8 and the outer edge of the lidded container 17 and includes the seal section that joins the first packaging material and the second packaging material is referred to as the second area 20.

As with the pouch 10, the container with lid 17 is located in the second region 20 and has a hole 4 penetrating the first packaging material and the second packaging material. In the example shown in FIG. 42, the hole 4 is located in the first edge seal portion 21 of the second region 20 between the first edge 11 of the container with lid 17 and the storage portion 8. The container with lid 17 also has a communication portion 5 that extends from the hole 4 to the outer edge of the container with lid 17 and penetrates the first packaging material and the second packaging material. In the example shown in FIG. 42, the communication portion 5 extends from the portion of the hole 4 closest to the first edge 11 to the first edge 11. The configuration of the hole 4 and the communication portion 5 are similar to those of the hole 4 and the communication portion 5 of the pouch 10, so a description thereof will be omitted.

Figure 43 is a cross-sectional view showing the lidded container 17 cut along line E-E in Figure 42. Also, Figure 44 is an enlarged cross-sectional view showing the first edge seal portion 21 and the storage portion 8 of the lidded container 17 in Figure 43.

In the example shown in FIG. 44, the first packaging material 30A constituting the lid 17a includes at least a first base material layer 51 and a first sealant layer 61 located on the inner surface side of the first base material layer 51. The first packaging material 30A of the lid 17a may have a configuration similar to that of the first packaging material 30A of the pouch 10.

In the example shown in FIG. 44, the second packaging material 30B constituting the container 17b includes at least the second base layer 52. The material constituting the second base layer 52 can be an unstretched plastic film such as unstretched polypropylene or unstretched nylon. The second base layer 52 may be composed of a single layer or may include multiple layers. For example, the second base layer 52 may be a co-extruded sheet including a first layer made of polypropylene, a second layer made of EVOH or nylon, and a third layer made of polypropylene. EVOH is an ethylene-vinyl alcohol copolymer. Although not shown, the second packaging material 30B may include layers other than the second base layer 52. The thickness of the second packaging material 30B is, for example, 150 μm or more and 800 μm or less.

The container 17b can be produced by processing the second packaging material 30B by a sheet molding method. The sheet molding method is a method in which a packaging material such as a sheet material is heated and softened, and then a mold is pressed against the sheet to form the desired shape. Vacuum forming, pressure forming, vacuum pressure forming, press molding, etc. can be used. The container 17b may also be produced by other methods such as injection molding.

The first packaging material 30A constituting the lid 17a includes at least one layer located in both the first region 19 and the second region 20, similar to the first packaging material 30A of the pouch 10. For example, as shown in FIG. 44, the first base material layer 51 and the first sealant layer 61 of the first packaging material 30A are located in both the first region 19 and the second region 20.

The second packaging material 30B constituting the container 17b also includes at least one layer located in both the first region 19 and the second region 20. For example, as shown in FIG. 44, the second base material layer 52 of the second packaging material 30B is located in both the first region 19 and the second region 20.

In this modified example, the hole 4 and the communication part 5 are formed in the second region 20 of the lidded container 17, so that the support part 71 can be inserted into the hole 4 via the communication part 5. Therefore, the lidded container 17 can be attached to or detached from the support part 71 at any position on the support part 71.

(Modification of the second packaging material for the container with lid)
Fig. 45 is a cross-sectional view showing a modified example of the second packaging material 30B of the lidded container 17. Fig. 45, like Fig. 44, shows an enlarged view of the first edge seal portion and the containing portion of the lidded container of Fig. 43.

As shown in FIG. 45, the second packaging material 30B constituting the container 17b may include a second base material layer 52 and a second sealant layer 62 located on the inner surface side of the second base material layer 52. The second base material layer 52 may include a stretched plastic film that is at least uniaxially stretched, and preferably biaxially stretched. The second sealant layer 62 may be the same as the second sealant layer 62 of the second packaging material 30B of the pouch 10. The thickness of the second packaging material 30B is, for example, 60 μm or more and 200 μm or less.

(Mechanical properties of the second region of the container with lid)
When the package is a container with a lid, similarly to the pouch 10, it is preferable that the region of the second region 20 where the hole 4 is located has a predetermined bending stiffness in at least one direction. For example, it is preferable that the average bending stiffness is 15 g·cm ² /cm or more. It is also preferable that the initial bending stiffness is 22 g·cm ² /cm or more.

When the package is a container with a lid, as in the case of the pouch 10, the initial bending stiffness and average bending stiffness in the flow direction and perpendicular direction can be measured by first cutting out a test piece 80 from a region of the second region 20 that has the same layer structure as the region in which the hole 4 is located. The preferred ranges of the initial bending stiffness and average bending stiffness in the flow direction and perpendicular direction are the same as those in the case of the pouch 10, so a description thereof will be omitted.

(Modifications of the packaging body)
Next, an example in which the packaging body is a tube 18 will be described. Fig. 46 is a front view showing the tube 18 as viewed from the side of the first surface 1. The tube 18 includes a cylindrical body portion 18a and a mouth portion 18b. A cap 18c may be attached to the mouth portion 18b.

The body 18a is made of a packaging material, similar to the pouch 10. The body 18a includes a first packaging material that constitutes the first surface 1 and a second packaging material that constitutes the second surface 2. A storage section 8 that contains the contents is formed between the first surface 1 and the second surface 2. In the example shown in FIG. 46, the first packaging material and the second packaging material are formed by forming a sheet of packaging material into a cylindrical shape.

In the example shown in FIG. 46, the outer edge of the body 18a of the tube 18 has a first edge 11, a second edge 12 that faces the first edge 11 in the first direction D1, and a third edge 13 and a fourth edge 14 that extend between the first edge 11 and the second edge 12.

The body 18a of the tube 18 includes a seal portion in which the inner surface of the first packaging material constituting the first surface 1 and the inner surface of the second packaging material constituting the second surface 2 are joined, similar to the pouch 10. In the example shown in FIG. 46, the seal portion of the body 18a includes a first edge seal portion 21 that extends along the first edge 11.

The body 18a of the tube 18 also has a joint 6 that extends in the first direction D1 from the first edge 11 to the second edge 12 on the first surface 1 side. The joint 6 includes a seal portion where the inner surface of one end and the outer surface of the other end of one sheet of packaging material that constitutes the first packaging material and the second packaging material are joined. Although not shown, the joint 6 may be located on the second surface 2 side.

In this modified example, as in the case of the pouch 10, the region of the body 18a of the tube 18 that overlaps with the storage section 8 in a plan view is referred to as the first region 19. Also, the region that is located between the storage section 8 and the outer edge of the body 18a and includes the seal portion that joins the first packaging material and the second packaging material is referred to as the second region 20.

As with the pouch 10, the body 18a of the tube 18 is located in the second region 20 and has a hole 4 penetrating the first packaging material and the second packaging material. In the example shown in FIG. 46, the hole 4 is located in the first edge seal portion 21 of the second region 20 between the first edge 11 of the body 18a and the storage portion 8. The body 18a also has a communication portion 5 that extends from the hole 4 to the outer edge of the body 18a and penetrates the first packaging material and the second packaging material. In the example shown in FIG. 46, the communication portion 5 extends from the portion of the hole 4 closest to the first edge 11 to the first edge 11. The configuration of the hole 4 and the communication portion 5 are similar to those of the hole 4 and the communication portion 5 of the pouch 10, so a description thereof will be omitted.

Figure 47 is a cross-sectional view showing the body 18a of the tube 18 cut along line F-F in Figure 46. As shown in Figure 47, the first packaging material 30A constituting the first surface 1 includes at least a first base material layer 51 and a first sealant layer 61 located on the inner surface side of the first base material layer 51. The first packaging material 30A may also include a third sealant layer 63 located on the outer surface side of the first base material layer 51. By providing the third sealant layer 63, it is possible to join the inner surface of one end of the packaging material to the outer surface of the other end, as in the joint 6 described above.

The first base material layer 51 of the first packaging material 30A may have a similar configuration to the first base material layer 51 of the first packaging material 30A constituting the above-mentioned pouch 10 and lid 17a. The first sealant layer 61 and the third sealant layer 63 may have a similar configuration to the first sealant layer 61 of the first packaging material 30A constituting the above-mentioned pouch 10 and lid 17a.

The second packaging material 30B constituting the second surface 2 includes at least a second base material layer 52 and a second sealant layer 62 located on the inner surface side of the second base material layer 52. The second packaging material 30B may include a fourth sealant layer 64 located on the outer surface side of the second base material layer 52. The materials, thicknesses, and other configurations of the second base material layer 52, second sealant layer 62, and fourth sealant layer 64 of the second packaging material 30B may be similar to those of the first base material layer 51, first sealant layer 61, and third sealant layer 63 of the first packaging material 30A.

The thickness of the first packaging material 30A and the second packaging material 30B is, for example, 150 μm or more, may be 200 μm or more, or may be 250 μm or more. The thickness of the first packaging material 30A and the second packaging material 30B may be 500 μm or less, may be 400 μm or less, or may be 300 μm or less.

The first packaging material 30A constituting the first surface 1 of the body 18a includes at least one layer located in both the first region 19 and the second region 20, similar to the first packaging material 30A of the pouch 10. For example, as shown in FIG. 47, the first base material layer 51, the first sealant layer 61, and the third sealant layer 63 of the first packaging material 30A are located in both the first region 19 and the second region 20.

The second packaging material 30B constituting the second surface 2 of the body 18a also includes at least one layer located in both the first region 19 and the second region 20. For example, as shown in FIG. 47, the second base material layer 52, the second sealant layer 62, and the fourth sealant layer 64 of the second packaging material 30B are located in both the first region 19 and the second region 20.

In this modified example, the hole 4 and the communication portion 5 are formed in the second region 20 of the body portion 18a of the tube 18, so that the support portion 71 can be inserted into the hole 4 via the communication portion 5. This allows the tube 18 to be attached to or detached from the support portion 71 at any position on the support portion 71.

Mechanical Properties of the Second Region of the Tube
When the packaging body is a tube, similarly to the pouch 10, it is preferable that the region of the second region 20 where the hole 4 is located has a predetermined bending stiffness in at least one direction. For example, it is preferable that the average bending stiffness is 15 g· ^cm2 /cm or more. Also, it is preferable that the initial bending stiffness is 22 g· ^cm2 /cm or more.

When the package is a tube, as in the case of the pouch 10, the initial bending stiffness and average bending stiffness in the flow direction and perpendicular direction can be measured by first cutting out a test piece 80 from a region of the second region 20 that has the same layer structure as the region in which the hole 4 is located. The preferred ranges of the initial bending stiffness and average bending stiffness in the flow direction and perpendicular direction are the same as those in the case of the pouch 10, so a description thereof will be omitted.

(Examples of Combinations of the Embodiments and Modifications)
The features of the above-described embodiment and each of the modified examples can be combined as appropriate.

For example, the modified communication portion 5 shown in Figs. 12 to 14 may be combined with the modified pouch shown in Figs. 29 to 37, with the lidded container 17 shown in Figs. 42 to 45, or with the tube 18 shown in Figs. 46 and 47. The modified hole 4 shown in Figs. 15 to 21 may be combined with the modified pouch shown in Figs. 29 to 37, with the lidded container 17 shown in Figs. 42 to 45, or with the tube 18 shown in Figs. 46 and 47.

Next, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the description of the following examples as long as it does not deviate from the gist of the invention.

[Example A1]
A test piece 80 was prepared, which included four laminated sheets of packaging material. Since the thickness of one sheet of packaging material was 82 μm, the thickness of the test piece 80 was 328 μm. The layer structure of such a test piece 80 corresponds to the layer structure of the peripheral region of the hole 4 formed in the joint portion 7 shown in FIG. 34, or the layer structure of the peripheral region of the hole 4 formed in the region overlapping with the reinforcing material 55 made of the folded packaging material shown in FIG. 30. The layer structure of one sheet of packaging material is as follows:
OPP20/PE10/ALPET12/PE10/CPP30
The "/" indicates the boundary between layers. The leftmost layer is the layer that constitutes the outer surface of the packaging material, and the rightmost layer is the layer that constitutes the inner surface of the packaging material.
"OPP" means biaxially oriented polypropylene film. "PE" means a polyolefin resin layer using polyethylene. "ALPET" means biaxially oriented PET film with an aluminum vapor deposition layer. "CPP" means unoriented polypropylene film. The numbers indicate the layer thickness (unit: μm).

The bending stiffness of the test piece 80 in the machine direction and the perpendicular direction was measured. A pure bending property tester JTC-911BT manufactured by SMT Corporation was used as the measuring device. The environment during the measurement was a temperature of 25°C and a relative humidity of 50%. The average bending stiffness in the machine direction was 28.1 g·cm ² /cm, and the average bending stiffness in the perpendicular direction was 19.8 g·cm ² /cm. The initial bending stiffness in the machine direction was 55.0 g·cm ² /cm, and the initial bending stiffness in the perpendicular direction was 24.7 g·cm ² /cm.

[Comparative Example A1]
The test piece 80 was prepared in the same manner as in Example A1, except that the number of sheets of packaging material constituting the test piece 80 was two. The thickness of the test piece 80 was 164 μm.

The bending stiffness in the machine direction and the perpendicular direction of the test piece 80 was measured in the same manner as in Example A1. The average bending stiffness in the machine direction was 7.8 g·cm ² /cm, the average bending stiffness in the perpendicular direction was 9.5 g·cm ² /cm, the initial bending stiffness in the machine direction was 11.4 g·cm ² /cm, and the initial bending stiffness in the perpendicular direction was 14.2 g·cm ² /cm.

[Comparative Example A2]
A test piece 80 made of a biaxially stretched PET film was prepared. The thickness of the test piece 80 was 150 μm.

The bending stiffness in the machine direction and the perpendicular direction of the test piece 80 was measured in the same manner as in Example A1. The average bending stiffness in the machine direction was 14.7 g·cm ² /cm, the average bending stiffness in the perpendicular direction was 15.9 g·cm ² /cm, the initial bending stiffness in the machine direction was 21.2 g·cm ² /cm, and the initial bending stiffness in the perpendicular direction was 22.3 g·cm ² /cm.

[Example B1]
The pouch 10 shown in FIG. 1A was produced using the same packaging material as in Example A1. Specifically, the same packaging material as in Example A1 was used as the first packaging material 30A on the first surface 1 and the second packaging material 30B on the second surface 2. In addition, the packaging material of Example A1 folded in two as shown in FIG. 25 was used as the reinforcing material 55 of the reinforcing portion 21a. The thickness of the pouch 10 around the hole 4 was 328 μm. The distance W2 between the first line 5x and the second line 5y at the position where the second portion 5b connects to the hole 4 was 2 mm. The diameter of the hole 4 was 8 mm.

Next, a load was applied to the pouch 10 with the hanging tool 70 inserted into the hole 4 of the pouch 10, and the maximum load that the pouch 10 could withstand was measured. Specifically, as shown in FIG. 48, the support part 71 of the hanging tool having a circular cross section with a diameter of 6 mm was inserted into the hole 4 located on the first edge 11 side of the pouch 10. Next, the second edge 12 located on the opposite side of the first edge 11 was pulled upward using the scale 90. Specifically, as shown in FIG. 48, the scale 90 was pulled upward with the hook 91 of the scale 90 hooked on the hole 92 formed in the pouch 10 on the second edge 12 side. As the scale, a PORTABLE ELECTRONIC SCALE WH-A04 manufactured by WeiHeng was used.

The measurement was performed five times, and the maximum load applied to the scale was recorded for each measurement. The results are shown in Figure 49. The average maximum load was 143.2 g.

In addition, five panelists evaluated the stability of the pouch 10 by touching and pulling the pouch 10 while the pouch 10 was hung from the support part 71 of the hanging device via the hole 4 of the pouch 10. The results are shown in Figure 50. All panelists 1 to 5 rated the pouch 10 as "good." "Good" means that the pouch 10 did not fall when it was touched, but did fall when it was twisted.

[Comparative Example B1]
The pouch 10 was produced in the same manner as in Example B1, except that the pouch 10 did not include the reinforcing portion 21a. The thickness of the pouch 10 around the hole 4 was 164 μm.

Next, the maximum load that the pouch 10 could withstand was measured in the same manner as in Example B1. The results are shown in Figure 49. The average maximum load was 47.8 g.

Furthermore, in the same manner as in Example B1, five panelists evaluated the stability of the pouch 10 suspended from the support portion 71 of the suspension device. The results are shown in Figure 50. All panelists 1 to 5 rated the pouch 10 as "bad." "Bad" means that the pouch 10 fell simply by touching it.

[Example B2]
A tube 18 shown in Fig. 46 was produced using a packaging material having a thickness of 334 µm. The thickness of the tube 18 around the hole 4 was 668 µm. The distance W2 between the first line 5x and the second line 5y at the position where the second portion 5b connects to the hole 4 was 2 mm. The layer structure of the packaging material is as follows:
PEF130/PET12/ALPET12/PEF180
"PEF" means polyethylene film.

Next, in the same manner as in Example B1, the maximum load that the tube 18 could withstand was measured. The results are shown in Figure 49. The average maximum load was 754.2 g.

Furthermore, in the same manner as in Example B1, five panelists evaluated the stability of the tube 18 suspended from the support part 71 of the suspension device. The results are shown in Figure 50. All panelists 1 to 5 rated the pouch 10 as "great." "Great" means that the pouch 10 did not fall when touched, and hardly fell at all when twisted.

1 First surface 2 Second surface 4 Hole 5 Communication portion 5a First portion 5b Second portion 5c Curved portion 5x First line 5y Second line 5z Intermediate line 6 Joint portion 7 Joint portion 7a Base portion 7b Tip portion 8 Storage portion 9 Opening 10 Pouch 11 First edge 12 Second edge 13 Third edge 14 Fourth edge 15 Easy-opening means 15a Incision 16 Zipper tape 17 Lidded container 17a Lid 17b Container 17c Flange portion 18 Tube 18a Body portion 18b Mouth portion 18c Cap 19 First region 20 Second region 21 First edge seal portion 21a Reinforcement portion 21b Outer edge side seal portion 21c Storage portion side seal portion 22 Second edge seal portion 23 Third edge seal portion 24 Fourth edge seal portion 30 Packaging material 30A First packaging material 30B Second packaging material 51 First base layer 52 Second base layer 53 First additional layer 54 Second additional layer 55 Reinforcement material 56 Base layer 57 Sealant layer 61 First sealant layer 62 Second sealant layer 65 First adhesive layer 66 Second adhesive layer 67 Third adhesive layer 68 Fourth adhesive layer 70 Hanger 71 Support portion 72 Holding portion 73 Fixing portion 80 Test piece 85 Measuring device 86 First clamp 87 Second clamp D1 First direction D2 Second direction

Claims (2)

A tube having a storage section formed by joining a first packaging material located on a first surface side and a second packaging material located on a second surface side,
The container has a cylindrical body, a mouth, and a cap attached to the mouth.
The body portion is
A first region overlapping the storage portion in a plan view;
a second region including a seal portion located between the housing portion and an outer edge of the tube in a plan view and joining the first packaging material and the second packaging material;
a hole located in the second region and penetrating the first packaging material and the second packaging material;
a communication portion extending from the hole to an outer edge of the tube and penetrating the first packaging material and the second packaging material;
the first packaging material includes at least one layer located in both the first region and the second region;
the second packaging material includes at least one layer located in both the first region and the second region;
a contour of the communication portion from the hole to the outer edge of the tube includes a first line and a second line;
The communicating portion comprises a first portion including a portion where the distance between the first line and the second line narrows from the outer edge of the tube toward the hole, and a second portion located between the first portion and the hole and including a portion where the distance between the first line and the second line is 2.0 mm or less. The tube according to claim 1, wherein a test piece containing at least the first packaging material and the second packaging material and cut out from the area of the second region where the hole is located has an average bending stiffness in the machine direction of 15 g·cm ² /cm or more.