JP2023145028A - packaging container - Google Patents

Abstract

To provide a packaging container contributing to reducing carbon dioxide emissions in a circulation process of products.SOLUTION: A packaging container is equipped with a body portion that has a front surface portion and a back surface portion made of a film sheet, a bottom portion that is formed by the film sheet and is provided at a lower part of the body portion, a side seal portion that joins the front surface portion and the back surface portion, a lower seal portion that seals the body portion and the bottom portion, a vertical folding line that is provided on the body portion and extends in a vertical direction to guide the bending of the body portion, and a bonding portion that bonds the side seal portion while being folded and overlapped on the body portion.SELECTED DRAWING: Figure 1

Description

The present invention relates to packaging containers.

Conventionally, various packaging containers for packaging products made of liquids, powders, and granules have been known. For example, Patent Document 1 discloses a bag-like container (pouch) in which the edges of a laminated film are sealed to form a storage section, and is configured to be able to stand on its own with a packaged item stored inside.

Special Publication No. 64-6945

In recent years, there has been a need to reduce environmental impact in order to prevent global warming. In industry, the environmental impact is quantitatively evaluated using LCA (Life Cycle Assessment), which is a method of quantifying the total amount of carbon dioxide emitted from the raw material acquisition stage to the product disposal stage. There is. Along with this, packaging containers that take LCA into consideration and contribute to reducing carbon dioxide emissions are desired. In the case of a bag-shaped container such as that disclosed in Patent Document 1, there are many gaps within the packaging box such as a cardboard box, resulting in low transportation efficiency, and improvements are desired from the viewpoint of reducing carbon dioxide emissions.

In view of the above circumstances, an object of the present invention is to provide a packaging container that contributes to reducing carbon dioxide emissions during the product distribution process.

A packaging container according to an aspect of the present invention includes a body having a front part and a back part made of a film sheet, a bottom part made of the film sheet and provided at a lower part of the body, and a body having a front part and a back part made of the film sheet. a side seal portion to be joined; a lower seal portion that seals the body portion and the bottom portion; a vertical fold line provided on the body portion and extending in the vertical direction to guide bending of the body portion; and the side seal portion. an adhesive portion that adheres the folded body to the body portion.

According to the present invention, it is possible to provide a packaging container that contributes to reducing carbon dioxide emissions during the product distribution process.

It is a perspective view showing an example of a packaging container concerning this embodiment. FIG. 2 is a perspective view showing an example of use of the packaging container according to the present embodiment. It is a longitudinal cross-sectional view of the packaging container concerning this embodiment. It is a bottom view of the packaging container concerning this embodiment. It is a front view of the packaging container concerning this embodiment. FIG. 2 is a front view of a completed packaging container according to the present embodiment. FIG. 2 is a schematic diagram showing a packaging mode of a packaging container. FIG. 2 is a schematic diagram of the bottom surface of the packaging container according to the present embodiment. It is a front view of the packaging container of a modification. It is a front view which shows the example of use of the packaging container of a modification.

Hereinafter, a packaging container 1 according to an embodiment will be described with reference to FIGS. 1 to 10.
FIG. 1 is a perspective view of a packaging container 1 according to the present embodiment viewed from the front side. FIG. 2 is a perspective view showing an example of how the packaging container 1 is used. FIG. 3 is a longitudinal cross-sectional view of the packaging container along the front-rear direction. FIG. 4 is a bottom view of the packaging container 1.
The packaging container 1 is a container for storing a distributed product, and is used, for example, as a pouch (bag-like flexible packaging). The inside of the packaging container 1 is filled with an object to be packaged, such as a liquid, powder, or granular material. Examples of the items to be packaged include foods such as liquid seasonings and flour, liquid and bead-shaped detergents and cosmetics.

As shown in FIGS. 1 to 3, the packaging container 1 has a body 10 and a bottom 50. The trunk section 10 includes a front section 2 and a back section 3. The body section 10 is constructed by joining a front section 2 and a back section 3. The bottom part 50 is provided between the lower part of the front part 2 and the lower part of the back part 3. The bottom portion 50 is provided at the lower part of the body portion 10. The front part 2, the back part 3, and the bottom part 50 are made of a flexible plastic film (or sheet). A film sheet is constructed by laminating at least a base material layer and a sealant. A film sheet having a known structure used as a pouch can be applied to the front part 2, the back part 3, and the bottom part 50.
The materials and laminated configurations of the respective film sheets forming the body 10 and the bottom 50 may be the same or different. Further, the front part 2, the back part 3, and the bottom part 50 may be constructed using separate parts, and the front part 2, the back part 3, and the bottom part 50 may be formed by folding one film sheet. Good too.

The film sheet has a heat-sealable resin layer (sealant layer) on at least one surface in the thickness direction. Among thermoplastic resins, polyolefin resins are generally used as the material for the sealant layer, and specifically, low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), and linear low-density polyethylene resin are used. Ethylene resins such as (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, and ethylene-methacrylic acid resin copolymer can be used. Furthermore, polypropylene resins such as blend resins of polyethylene and polybutene, homopolypropylene resins (PP), propylene-ethylene random copolymers, propylene-ethylene block copolymers, propylene-α-olefin copolymers, etc. may be used. You can also do it.
Regarding layers other than the sealant layer, the number and configuration thereof may be determined as appropriate in consideration of the functions, characteristics, etc. required of the packaging container 1. For example, a gas barrier layer that prevents the permeation of certain gases, a light shielding layer that protects the packaged items from light, a printing layer that gives the packaging container a certain appearance, and an overcoat that prevents scratches on the surface of the packaging container. Examples include layers.
A plastic film may be used as a layer other than the sealant layer. Examples of materials that can be used for the plastic film include polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon-6, nylon-66, etc.), polyimide, etc., depending on the application. can be selected as appropriate. In particular, when polypropylene or polyethylene terephthalate is used as a plastic film, it is more preferable in terms of film strength and cost. In addition, when a stretched polyamide film is used, toughness against puncture and impact can be imparted to the laminate.
A laminated film may be formed by joining a film-like sealant layer and the above-mentioned plastic film using an adhesive layer.
Other examples of the film sheet include a biomass film made from plant-derived raw materials and a recycled film made by recycling recovered resin.
The film sheet of the embodiment has, for example, a three-layer structure consisting of nylon (Ny)/vapor-deposited polyethylene terephthalate (VMPET)/linear low-density polyethylene resin (LLDPE).

The thickness of the film sheet is, for example, 50 μm or more and 300 μm or less. If the thickness of the film sheet is less than 50 μm, the shape retention of the body portion 10 cannot be ensured. If the thickness of the film sheet is thicker than 300 μm, even if the vertical fold lines 61 and 62 are provided, it is difficult to form bent corners of the film sheet, and it is difficult to form a substantially prismatic body.

The thickness of the sealant is, for example, 30 μm or more and 200 μm or less. If the thickness of the sealant is less than 30 μm, sufficient sealing performance cannot be obtained when the weight of the packaged item is large. Even if the thickness of the sealant is made thicker than 200 μm, no significant improvement in sealing performance can be obtained, and excessive material will be used, which is not desirable from the viewpoint of reducing environmental load.

Both ends of the front part 2 in the width direction Y and both ends of the back part 3 in the width direction Y are joined to each other by heat-sealing a sealant having heat-adhesive properties, and the side seal parts 41 and 42 are It is formed. The side seal portions 41 and 42 are formed with a generally constant width in the vertical direction Z. As shown in FIG. 3, in the lower part of the packaging container 1, the edge of the bottom part 50 and the lower end part 25 of the front part 2 are bonded by heat fusion in a state where the bottom part 50 is folded so as to be convex upward. The edges of the bottom portion 50 and the lower end portion 35 of the back surface portion 3 are bonded to each other by heat fusion to form the lower seal portion 43. In this way, by joining the bottom part 50, the front part 2, and the back part 3, a storage part 8 is formed between the front part 2 and the back part 3, in which the article to be packaged is stored. Although the storage capacity of the storage section 8 is not particularly limited, it is possible to store, for example, about 100ml to 3000ml of packaged items.

As shown in FIG. 1, in the packaging container 1, the upper edge of the front part 2 and the upper edge of the back part 3 are not joined, and the upper end 21 is open, and the packaged item is stored in the storage part 8. In the previous state, the packaging container 1 is produced as a single body. In the primary body of the packaging container 1, when the storage section 8 is filled with the object to be packaged in the filling process of the object to be packaged, the crease 55 of the bottom part 50 moves downward due to the weight of the object to be packaged, and the bottom part 50 moves back and forth. Spreads in direction X. As a result, the volume of the packaging container 1 increases, the bottom portion 50 widens, and the packaging container 1 becomes self-supporting. In the primary body of the packaging container 1, the storage part 8 is filled with the object to be packaged, and as shown in FIG. The packaging container 1 functions as a completed product in a stored and distributable state.

Vertical fold lines 61 and 62 and second vertical fold lines 64a and 64b are provided on at least one of the front part 2 and the back part 3. The vertical fold lines 61 and 62 guide the bending of the front part 2 or the back part 3. The vertical fold lines 61 and 62 are formed to extend in the vertical direction Z. The vertical fold lines 61 and 62 are formed into linear shapes by, for example, embossing. Specifically, the film sheet is formed into a linear shape by sandwiching and pressing the film sheet in the thickness direction between linear male and female molds. For embossing, there is a method in which a film sheet is passed between two rolls on which a linear mold has been formed to form vertical fold lines 61 and 62, and a method in which a male mold and a female mold are placed on both sides of the film sheet and a mold is formed. A method of forming the vertical broken lines 61 and 62 by intermittent driving can be adopted. FIG. 5 is a front view of the primary body of the packaging container 1. 1 and 5 show an example in which vertical fold lines 61 and 62 are formed on the front part 2 at two locations separated in the width direction Y.

As shown in FIGS. 1 and 2, for example, one vertical fold line 61, 62 is provided between the center part of the front part 2 or the back part 3 in the width direction Y, and the side seal parts 41, 42, respectively. It is being By forming the vertical fold lines 61 and 62 at two locations apart in the width direction Y, when an external force is applied to the film sheet due to the load of the packaged items stored in the storage section 8, the front part 2 and the back part 3 The film sheet constituting the film sheet is easily bent at the vertical fold lines 61 and 62. That is, when a packaged item is stored in the storage section 8 and the front part 2 and the back part 3 are expanded from the inside to the outside, the vertical fold lines 61 and 62 determine the position at which the film sheet is bent. As a result, the body 10 of the packaging container 1 has a substantially quadrangular prism shape, and even the packaging container 1 made of a film sheet can be maintained in a quadrangular prism shape. Even if the packaging container 1 is formed of a flexible film sheet, the completed packaging container 1 in which the object to be packaged is stored can have a substantially prismatic homogeneous outer shape.

In FIG. 1, for convenience of explanation, vertical fold lines 61 and 62 are shown in different forms, but when forming a plurality of vertical fold lines on the front part 2 or the back part 3, if the vertical fold lines of the same form are formed, 10 can be bent with good balance. The vertical fold line may be formed of at least one vertical line, for example, like the vertical fold line 62 shown on the left side of FIG. Since the vertical fold lines 61 and 62 are formed by pressing a linear mold onto the film sheet, when an external force is applied in the thickness direction of the film sheet, the front part 2 or the back part will break at the vertical fold lines 61 and 62. 3 is bent and the bent shape can be maintained.

The vertical fold lines 61 and 62 may be configured by a pair of vertical lines 61a and 61b arranged in parallel at a position close to the width direction Y, like the vertical fold line 61 shown on the right side of FIG. . In this way, when the two vertical lines 61a and 61b are spaced apart from each other and arranged in parallel to form one vertical fold line 61, the film sheet is bent along the vertical lines 61a and 61b, respectively. For example, even if the angle at which each of the vertical lines 61a, 61b is bent is small, the film sheet will be folded at two close positions, so it is easy to form a bent portion. Therefore, the front part 2 or the back part 3 can be easily bent by the vertical fold line 61 including the pair of vertical lines 61a and 61b, and can maintain the folded shape. The distance between the pair of vertical lines 61a, 61b in the width direction Y varies depending on the characteristics such as the thickness and rigidity of the film sheet, but for example, if it is 1 mm or more and 5 mm or less, the pair of vertical lines 61a, 61b is provided. As a result, the above effects can be obtained.

The vertical fold lines 61 and 62 may be formed straight in the vertical direction Z. For example, as shown in FIG. 1, it may be a broken line in which a plurality of short straight lines are arranged vertically, or continuous straight vertical broken lines 61 and 62. When pressing the film sheet in the thickness direction with a linear mold to form vertical fold lines, if the vertical fold lines 61 and 62 are in the form of broken lines, the pressing force per unit area by the die will be stronger, Deep and uniform polygonal lines with less unevenness can be formed. As a result, the effect of bending the film sheet by the vertical fold lines 61 and 62 can be enhanced. can be increased.

The vertical fold lines 61 and 62 are formed from below the upper seal part 9 (see FIG. 2) to above the lower seal part 43. The upper seal part 9 is an area where the upper side of the front part 2 and the upper side of the back part 3 are joined and sealed. The upper seal part 9 is sealed after storing the packaged item. The vertical fold lines 61 and 62 are formed at positions spaced apart from the upper seal part 9 and the lower seal part 43, avoiding the upper seal part 9 and the lower seal part 43. For the purpose of guiding the bending of the film sheet by providing the vertical fold lines 61 and 62, the structure in which the vertical fold lines 61 and 62 are formed at positions avoiding the upper seal part 9 and the lower seal part 43 is not an essential structure. On the other hand, if the vertical fold lines 61 and 62 are formed at positions avoiding the upper seal part 9 and the lower seal part 43, the sealing performance of the upper seal part 9 and the lower seal part 43 will not be affected.

More specifically, when heat sealing the upper edge of the front part 2 and the upper edge of the back part 3, which will become the upper seal part 9, the upper edge of the front part 2 and the upper edge of the back part 3 are If the ruled lines have been applied in advance to form the vertical fold lines 61 and 62, the areas where the ruled lines have been applied will not form a seal between the planes. As a result, the portion where the ruled line processing is applied may not be sufficiently sealed, which may weaken the sealing strength and cause a sealing failure. Similarly, for the lower seal part 43, if the edge of the bottom part 50 and the lower end 35 of the back part 3 have been previously subjected to ruled line processing to form the vertical fold lines 61 and 62, the ruled line processing can be performed. There is a risk that the sealed portions will not be sufficiently sealed, resulting in weakened sealing strength and a seal failure. In this embodiment, as described above, the vertical fold lines 61 and 62 are formed at positions that do not overlap with the upper seal part 9 and the lower seal part 43, and are not formed in the upper seal part 9 and the lower seal part 43. Therefore, there is no risk of seal failure as described above.

The vertical fold lines 61 and 62 may be provided at positions that match the dimensions of the bottom portion 50. As shown in FIG. 5, the upper end 521 of the lower seal portion 43 has a downwardly convex curved shape. The bottom portion 50 has a ship bottom shape in the absence of vertical fold lines. That is, when the storage portion 8 is expanded, the bottom portion 50 expands in the front-rear direction X from the left and right side seal portions 41 and 42 toward the center in the width direction Y, and has a curved shape in the vertical direction Z. It has a descending shape. The bottom portion 50 has an elongated spheroid shape like a rugby ball in plan view when there is no vertical fold line. If the vertical fold lines 61 and 62 are provided at positions corresponding to the portions of the bottom portion 50 where the inclination angle in the front-rear direction A similar shape is formed. That is, in the bottom portion 50, from a portion where the change in length in the front-back direction X of the bottom portion 50 is small to a central portion in the width direction Y, the change in the distance between the front portion 2 and the back portion 3 is small. By providing vertical fold lines 61 and 62 at positions corresponding to portions where the change in length in the front-rear direction X of the bottom portion 50 is small, a shape closer to a quadrangular prism shape can be formed.

A bottom fold line 63 may also be formed on the bottom portion 50. As shown in FIG. 4, a bottom fold line 63 is formed on a straight line connecting each of the vertical fold lines 61, 62 of the front part 2 and the vertical fold lines 61, 62 of the back part 3 in the front-rear direction X, respectively. As a result, the bending position of the bottom portion 50 is guided. The method for forming the bottom fold line 63 is the same as that for the vertical fold lines 61 and 62. Like the vertical fold lines 61 and 62, the bottom fold line 63 may be either a broken straight line or a continuous straight line.

The second vertical fold line 64a is arranged at a position closer to the side seal portion 41 than the vertical fold line 61. The second vertical fold line 64a is arranged at the inner edge 411 of the side seal portion 41 in the width direction Y. The second vertical fold line 64a guides the bending of the side seal portion 41. The second vertical fold line 64b is located closer to the side seal portion 42 than the vertical fold line 62. The second vertical fold line 64b is arranged at the inner edge 421 of the side seal portion 42 in the width direction Y. The second vertical fold line 64b guides the bending of the side seal portion 42.

The second vertical fold lines 64a, 64b are formed to extend in the vertical direction Z. Like the vertical fold lines 61 and 62, the second vertical fold lines 64a and 64b are formed into linear shapes by pressing a linear mold from both sides of the film sheet in the thickness direction. The second vertical fold lines 64a, 64b are formed by pressing a linear mold onto the film sheet, so when an external force is applied in the thickness direction of the side seal parts 41, 42, the vertical fold lines 61, 62 are formed. The side seal portion 41 or the side seal portion 42 is bent and the bent shape is easily maintained.

As long as the second vertical fold lines 64a and 64b are formed straight in the vertical direction Z, they may be broken lines in which a plurality of short straight lines are vertically lined up at intervals, or continuous straight lines. By making the second vertical fold lines 64a, 64b into broken lines, the pressing force per unit area by the mold becomes strong, and it is possible to form deep and homogeneous fold lines with less unevenness. As a result, the effect of bending the side seal portions 41, 42 by the second vertical bending lines 64a, 64b can be enhanced.

The second vertical fold lines 64a, 64b are formed from below the upper seal part 9 (see FIG. 2) to above the lower seal part 43. The second vertical fold lines 64a and 64b are formed at positions spaced apart from the upper seal part 9 and the lower seal part 43, avoiding the upper seal part 9 and the lower seal part 43. For the purpose of guiding the bending of the side seal parts 41 and 42 by providing the second vertical fold lines 64a and 64b, the second vertical fold lines 64a and 64b are formed at positions avoiding the upper seal part 9 and the lower seal part 43. The configuration is not a required configuration. On the other hand, when the second vertical fold lines 64a and 64b are formed at positions avoiding the upper seal part 9 and the lower seal part 43, they do not affect the sealing performance of the upper seal part 9 and the lower seal part 43.

Similarly to the vertical fold lines 61 and 62, when heat sealing the upper edge of the front part 2 and the upper edge of the back part 3, which will become the upper seal part 9, the upper edge of the front part 2 and the upper edge of the back part 3 are If the upper edge is previously subjected to a ruled line process to form the second vertical fold lines 64a, 64b, the ruled line process will not form a seal between the two planes. As a result, the portion where the ruled line processing is applied may not be sufficiently sealed, which may weaken the sealing strength and cause a sealing failure. Similarly, for the lower seal portion 43, if the edge of the bottom portion 50 and the lower end portion 35 of the back surface portion 3 have been previously subjected to ruled line processing to form second vertical fold lines 64a, 64b, the ruled line processing may be performed. There is a risk that the sealed portions will not be sufficiently sealed, resulting in weakened sealing strength and a seal failure. In this embodiment, as described above, the second vertical fold lines 64a and 64b are formed at positions that do not overlap with the upper seal part 9 and the lower seal part 43, and Since it is not formed, there is no risk of the seal failure as described above occurring.

The second vertical fold lines 64a, 64b can also be provided so as to include at least one of the upper seal portion 9 and the lower seal portion 43. In this case, the effect of bending the side seal portions 41 and 42 can be further enhanced. In particular, when the second vertical fold lines 64a, 64b are formed by pressing after the packaging container 1 is made or filled with contents, the seal of the upper seal portion 9 or the lower seal portion 43 is Does not affect performance.

This is because the second vertical fold lines 64a, 64b are different from the vertical fold lines 61, 62 in their function of facilitating bending of the side seal parts 41, 42.
More specifically, since the front part 2 and the back part 3 of the body part 10 need to be bent in the direction of forming a rectangular cylindrical shape, the vertical fold lines 61 and 62 formed in the front part 2 and the back part 3, respectively, are It is also preferable that the grooves are convex toward the outside of the packaging container 1. In this case, in the vertical fold lines 61 and 62, on the inner sealing surface where the front part 2 and the back part 3 face each other, the recesses face each other, creating a gap and reducing the sealing performance. On the other hand, since the second vertical fold lines 64a and 64b guide the bending of the side seal parts 41 and 42 (see FIG. 8), one side is convex on the inner seal surface where the front part 2 and the back part 3 face each other. It is preferable that one side is concave and the other side is concave. In this case, the second vertical fold lines 64a and 64b fit together the convex and concave portions of the inner sealing surfaces where the front part 2 and the back part 3 face each other, so that no gaps are created and deterioration in sealing performance is suppressed. . Therefore, the second vertical fold lines 64a, 64b can be provided so as to include at least one of the upper seal portion 9 and the lower seal portion 43.

By providing the second vertical fold lines 64a, 64b on the inner edges 411, 421, the bending at the inner edges 411, 421 is guided, and the direction in which the front part 2 and the back part 3 are separated from the side seal parts 41, 42. Easy to open. As a result, the opening at the upper edge of the primary body can be easily held in a wide open state, making it easier to put the packaged items into the storage section 8. In addition, by providing the second vertical fold lines 64a, 64b on the inner edges 411, 421, the side surfaces 33, 23 of the body 10 can be kept in shape in a state closer to a straight line, and the body 10 can be It approaches a prismatic shape. Therefore, the packaging container 1 contributes to reducing carbon dioxide emissions during the distribution process of a packaged product containing a packaged object. In other words, it is possible to provide a packaging container 1 that is highly effective in reducing environmental load.

Since the completed packaging container 1 has a substantially rectangular prism shape, it is possible to increase the packing efficiency in a packaging box such as a cardboard box. The amount of storage in the packaging container 1 relative to the volume of the packaging box is referred to as a packing ratio. In the completed packaging container 1 having a substantially quadrangular prism shape, side seal portions 41 and 42 protrude outward in the width direction from the body portion 10, as shown in FIGS. 1 and 4. In this case, the maximum dimension of the packaging container 1 in the width direction Y becomes larger. In this embodiment, the completed packaging container 1 is provided with an adhesive part 7 that adheres the side seal parts 41 and 42 to the front part 2 or the back part 3 of the body part 10 in a folded state.

Specifically, the adhesive portion 7 is provided on the front or back surface of the side seal portions 41 and 42. After the object to be packaged is stored and the upper seal part 9 is sealed, the side seal parts 41 and 42 are bent and adhered to the front part 2 or the back part 3 via the adhesive part 7.

As shown in FIG. 6, in this embodiment, the side seal parts 41 and 42 of the completed packaging container 1 are adhered to the body part 10 in a folded state by the adhesive part 7. The side seal parts 41 and 42 are guided in bending by providing the second vertical fold lines 64a and 64b, and can be easily folded into a state in which they overlap the body part 10. As a result, the amount of protrusion of the side seal portions 41 and 42 can be suppressed. Furthermore, by attaching the side seal parts 41 and 42 to the front part 2 or the back part 3, the side surfaces 33 and 23 of the body part 10 become closer to a linear shape, and the body part 10 becomes closer to a square prism shape.

The adhesive portion 7 may be provided over the entire length of the side seal portions 41, 42 in the vertical direction, but may also be provided locally. When the adhesive portion 7 is provided locally, when an external force is applied to the film sheet due to the load of the packaged items stored in the storage portion 8, the side seal portions 41 and 42 are attached to the lateral ends of the lower seal portion 43. In this case, a force is easily applied from the trunk 10 in a direction that makes it easy to open. Therefore, the position of the adhesive part 7 in the vertical direction is set in a range that includes the position of the horizontal end of the lower seal part 43 in the vertical direction.

As shown on the left side of FIG. 7, the conventional packaging container 101 has a bottom shaped like an ellipse or a rugby ball. Therefore, the packaging containers 101 are packed side by side so that the width direction of the packaging containers 101 is inclined with respect to the side 102 of the rectangular packaging box 100. As a result, many gaps S100 are created within the packaging box 100. On the other hand, since the packaging container 1 according to the embodiment has a substantially square prism shape, each surface of the body 10 is parallel to each side 11A, 12A of the packaging box 100A, as shown on the right side of FIG. They are packed side by side. As a result, the gap S100A between the packaging containers 1 can be reduced.

Further, in the completed packaging container 1, the side seal parts 41 and 42 are bonded to the body part 10 in advance by the adhesive part 7 in a folded state, and are parallel to the side surfaces 33 and 23 of the body part 10. For this reason, the maximum dimension of the packaging container 1 according to the embodiment in the direction in which the containers are arranged when packed in the packaging box 100A becomes small. As a result, by using the packaging container 1 according to the embodiment, the packing rate in the packaging box 100A, such as a cardboard box, can be further increased.

Although not shown, since the body 10 has a substantially square prism shape, the gap in the vertical direction Z inside the packaging box 100A can be significantly reduced compared to the conventional packaging container 101. Therefore, the packaging box 100A can be downsized when packing the same number of packaging containers 1. Alternatively, even if the packaging box has the same volume, the packaging container 1 according to this embodiment can accommodate a larger number of containers than the conventional packaging container 101. If the packing ratio increases, the amount of transportation per packaging box will increase, resulting in a reduction in carbon dioxide emissions during transportation.

Next, the dimensions of each part of the packaging container 1 will be explained. As mentioned above, the packaging container 1 is shaped into a substantially rectangular prism with the body 10 bent at a predetermined position in the completed state containing the object to be packaged, so that even if the packaging container 1 is made of a soft film sheet, , the shape of the body portion 10 is made homogeneous by having a substantially prismatic shape. As a result, it is possible to reduce the gap S100A in the packaging box 100A and increase the packing efficiency. The packaging container 1 may have the following dimensions, for example, in order to increase the packing efficiency.

When forming two vertical fold lines 61 and 62 on both the front part 2 and the back part 3, when the positions of the vertical fold lines 61 and 62 in the width direction Y are aligned on the front part 2 and the back part 3, the body part 10 can form a square or rectangular quadrangular prism shape, and the packing efficiency can be increased. For example, the length L31 in the width direction Y from the inner edge in the width direction Y of the side seal part 41 shown on the right side of FIG. Each vertical fold line 61, 62 is formed at a position where the length L32 in the width direction Y from the inner edge in the width direction Y to the vertical fold line 62 on the right side thereof is the same length.

When the above-mentioned lengths L31 and L32 are set according to the dimensions of the bottom portion 50, it is easy to maintain the substantially prismatic shape. For example, the angle θ between the tangent at the end 51 of the lower seal portion 43 in the width direction Y and the fold line 55 when the bottom portion 50 is folded is 45 degrees. As shown in FIG. 5, the maximum height H43 from the upper end 521 of the curved lower seal part 43 of the bottom part 50 to the fold line 55 and the inner edges 411, 421 of the side seal parts 41, 42 in the width direction Y The lengths L31 and L32 between the polygonal lines 61 and 62 are the same length. When the value ρ1 (ρ1=L31 (or L32)/H43) obtained by dividing the length L31 or L32 by the height H43 is in the range of 0.9 to 1.1, the relationship between the bottom part 50 and the side seal parts 41 and 42 is Reduce the space between. As a result of being able to reduce the gap between the packaging containers 1, the packing efficiency can be increased. In addition, the bottom portion 50 opens wide when it stands on its own, and the side surfaces 23 and 33 of the body portion 10 are shaped into a straight line. If the value of ρ1 is less than 0.9, the bottom portion 50 will not open sufficiently, and the self-supporting performance of the product containing the contents will deteriorate. If the value of ρ1 is larger than 1.1, the cross-sectional shape of the bottom portion 50 will be approximately hexagonal, which will reduce the efficiency of storage in a generally rectangular storage box such as a cardboard box, and will make the storage work complicated. .

Furthermore, as shown in FIGS. 5 and 8, a value ρ2 (ρ2=L2 /L4) is in the range of 0.9 to 1.1, it is possible to form the body 10 in the shape of a substantially square prism, as shown in FIG. When the body 10 having a substantially quadrangular prism shape is formed, the front part 2 and the back part 3 are bent along the vertical fold lines 61, 62, and the area between the vertical fold lines 61, 62 and the inner edges 411, 421 forms the body. The side surfaces 33 and 23 of the section 10 are formed.

As a result of the packaging container 1 having the above-mentioned dimensional relationship, the bottom portion 50 can be opened to the maximum extent, forming an ideal square prism in which the lengths L4 and L2 are approximately equal, and the shape retention performance is stable.

As shown in FIG. 1, the widths W41 and W42 of the side seal portions 41 and 42 are, for example, 15 mm or less. As shown in FIGS. 2 and 4, in the completed packaging container 1 before being bonded to the body portion 10 by the adhesive portion 7, the body portion 10 has a substantially prismatic shape, and the side seal portions 41 and 42 are It protrudes from the side surfaces 33 and 23 of the portion 10 in the direction Y1 and the direction Y2, respectively. When the widths W41 and W42 of the side seal parts 41 and 42 are 15 mm or less, even if the side seal parts 41 and 42 are peeled off from the adhesive part 7, the protruding side seal parts 41 and 42 are unlikely to interfere with packaging. , the packing rate can be increased. From the viewpoint of improving packing efficiency, the lower limit of widths W41 and W42 is not particularly limited, but from the viewpoint of ease of heat fusion and strength of the sealing part (for example, bag drop strength and pressure resistance strength), widths W41, The lower limit of W42 is 5 mm.

Since the packaging container 1 according to the present embodiment is provided with vertical fold lines 61 and 62 on at least one of the front part 2 and the back part 3, when an object to be packaged is stored in the storage part, the body part 10 is bent along the vertical fold lines due to its own weight. It is bent at portions 61 and 62, and the body 10 forms a substantially prismatic shape. As a result, even if the packaging container is made of a flexible film sheet, the body portion 10 maintains its shape in a substantially prismatic shape when an item to be packaged is stored in the storage portion 8. Therefore, when the packaging containers 1 are stored in the packaging box 100A such as a cardboard box, the gap between the packaging containers 1 can be reduced.

Further, in the packaging container 1 according to the present embodiment, the side seal parts 41 and 42 are bonded to the body part 10 in advance by the adhesive part 7 in a folded state, so that the side seal parts 41 and 42 are parallel to the side surfaces 33 and 23 of the body part 10. be. Therefore, when the packaging container 1 is stored in the packaging box 100A such as a cardboard box, the gap between the packaging containers 1 can be reduced compared to the case where the side seal parts 41 and 42 are not bonded and protrude. be. As a result, the packaging box 100A that accommodates the same number of packaging containers 1 can be made smaller. Alternatively, the number of packaging containers 1 stored in each packaging box 100A can be increased. Therefore, the amount of cardboard boxes and the like used can be reduced, contributing to a reduction in carbon dioxide emissions. Alternatively, more products can be loaded in a shipping container, the loading platform of a shipping vehicle, etc., which contributes to reducing carbon dioxide emissions during transportation. In other words, it is possible to provide a packaging container 1 that is highly effective in reducing environmental load.

Furthermore, the packaging container 1 according to the present embodiment has second vertical fold lines 64a, 64b that are arranged at the inner edges of the side seal parts 41, 42 in the width direction and guide the bending of the side seal parts 41, 42. This makes it easier to adhere the side seal parts 41 and 42 to the body part 10 in a folded state using the adhesive part 7.

According to the above-described packaging container 1, since the vertical fold lines 61 and 62 are provided at two or more locations apart from each other in the width direction Y of the body 10, the body 10 is shaped like a substantially rectangular prism when an object is stored therein. Can be shaped. By providing the vertical fold lines 61 and 62, it is possible to form the body portion 10 in the shape of a substantially quadrangular prism that bends at a predetermined position. Moreover, according to the above-mentioned packaging container 1, the maximum dimension of the packaging container 1 in the arrangement direction can be reduced by adhering the side seal parts 41 and 42 to the body part 10 in a folded state in advance by the adhesive part 7. Therefore, when the packaging container 1 is stored in the packaging box 100A, the gap inside the packaging box 100A can be reduced and the packing efficiency can be improved.

Furthermore, according to the above-described packaging container 1, by providing the second vertical fold lines 64a, 64b, the bending of the side seal parts 41, 42 is guided, and the side seal parts 41, 42 can be easily folded to overlap with the body part 10. Further, according to the above-described packaging container 1, the position of the adhesive part 7 in the vertical direction includes the position of the horizontal end of the lower seal part 43 in the vertical direction, and Since the side seal portions 41 and 42 are bonded to the body portion 10 at a position where a force in the direction of opening is likely to be applied, it is possible to suppress the side seal portions 41 and 42 from peeling off from the body portion 10.

According to the above-mentioned packaging container 1, the vertical fold lines 61 and 62 are provided on at least one of the front part 2 and the back part 3, so that a predetermined three-dimensional shape is formed in the body part 10 of the packaging container 1 containing the object to be packaged. Can be given a shape. When the vertical fold lines 61 and 62 are provided on both the front part 2 and the back part 3, the body part 10 of the packaging container 1 containing the object to be packaged can be maintained in a substantially prismatic shape. According to the above-described packaging container 1, the body 10 is bent along the vertical fold lines 61 and 62 to form a substantially prismatic shape when the storage portion 8 surrounded by the body 10 and the bottom 50 is filled with the object to be packaged. Since the shape is maintained in a substantially rectangular prism shape, the gap when stored in the packaging box 100A can be reduced and the packing efficiency can be improved. Therefore, the packaging container 1 contributes to reducing carbon dioxide emissions during the distribution process of a packaged product containing a packaged object. In other words, it is possible to provide a packaging container 1 that is highly effective in reducing environmental load.

(LCA evaluation)
When considering reducing CO ₂ emissions during the life cycle of flexible packaging materials for packaging manufacturers, it is important to consider reducing the raw materials needed to manufacture the packaging materials and the CO ₂ emitted during the manufacturing process. However, compared to the total amount of _CO2 emitted during the entire manufacturing of packaging materials, the amount of _CO2 emitted during the distribution process, from the filling point to the retail store after the brand owner fills the packaging material, is extremely large. big. In addition, a packaging box 100 such as a cardboard box is used to transport the packaging material filled with contents, but if the space ratio inside the packaging box 100 is large as in the case of a conventional general standing pouch, , transportation efficiency becomes even worse. A method of reducing CO ₂ emissions during transportation by increasing storage efficiency in the packaging box 100 and transportation efficiency is to use raw materials with low CO ₂ emissions ( For example, compared to using biomass-based materials (for example, materials made from biomass as raw materials), the effect of reducing _CO2 emissions is greater when looking at the entire life cycle of the product, including the distribution process. Furthermore, materials containing biomass resin as raw materials are more expensive than general materials. On the other hand, in this embodiment, even if the packaging container is manufactured using general materials, a high effect of reducing CO ₂ emissions can be obtained. Therefore, there is no need to increase the product price of packaging containers. Furthermore, since there is a possibility that the packaging container itself can be made smaller, the product price of the packaging container can be reduced.

(Example and comparative example)
An evaluation example of LCA will be explained.
As an example, a packaging container 1 according to the first embodiment was prepared. Specifically, a packaging container 1 having the shape shown in the first embodiment was prepared using a film having a layer configuration of ONY 15 μm/VMPET 12 μm/LLDPE 100 μm. As Comparative Example 1, a packaging container was prepared using the same size, shape, and material as in the example, but without vertical fold lines. As Comparative Example 2, a packaging container having the same size as Comparative Example 1 was prepared using a material containing a biomass raw material for the sealant layer. Specifically, a packaging container having the same size and shape as in Example 1 was prepared using a film having a layer configuration of ONY 15 μm/VMPET 12 μm/LLDPE 100 μm (biomass degree 50%). The volumes of the storage sections in the empty containers of Example and Comparative Examples 1 and 2 are the same.

The packaging containers of Example, Comparative Example 1, and Comparative Example 2 were filled with the same contents and sealed, and Comparative Example 1 and Comparative Example 2 were placed in packaging boxes of the same size. They were placed in a packaging box that matched the shape and had a size that could accommodate the same number as the comparative example. The CO ₂ emissions of each example were calculated when the number of Examples, Comparative Example 1, and Comparative Example 2 that could be loaded on a pallet of the same size was transported for 500 km. For comparison, the relative value of the CO ₂ emissions of the example and comparative example 2 was calculated using a value of 100 for comparative example 1, which is a conventional product. The calculation results are shown in Table 1.

As shown in Table 1, the amount of CO ₂ emitted during the production of the packaging container of the example was the same as that of Comparative Example 1, but the amount of CO ₂ emitted during transportation after filling was the lowest in the example. As a result, it can be seen that the example has the highest reduction rate of CO ₂ emissions in the life cycle including the manufacturing and distribution process of the packaging container. The size of the packaging box that can accommodate the same number of products is the smallest in the case of the product using the packaging container of the example, and the number of packaging boxes that can be loaded on the same size pallet is the largest, increasing transportation efficiency. One of the reasons is that it was created.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. The various shapes and combinations of the constituent members shown in the above example are merely examples, and can be variously changed based on design requirements and the like without departing from the gist of the present invention.

For example, in the embodiment described above, the adhesive portion 7 is provided in the side seal portions 41 and 42, but the adhesive portion 7 may be provided in the body portion 10.
In addition, although the vertical position of the adhesive part 7 includes the vertical position of the horizontal end of the lower seal part 43 in the side seal parts 41 and 42, the present invention is not limited to this configuration. Other positions may be used as long as the seal parts 41 and 42 are adhered to the body part 10 in a folded state.

In the above embodiment, as an example of the packaging container 1, a so-called standing pouch that can stand on its own is shown, but it is not essential that the packaging container stand on its own in its completed form. For example, it may be a non-self-supporting flat pouch, or it may be a packaging container in which the body 10 has a substantially prismatic shape and can be stored vertically in a packaging box.

In the embodiment described above, an example is shown in which the bottom portion 50 has a rugby ball-shaped boat bottom shape in plan view, but the shape of the bottom portion is not limited to the example of the embodiment. For example, it may be a hexagonal bottom in plan view, or a rectangular bottom such as a square or a rectangle.

In the above embodiment, an example of the packaging container 1 in which the body 10 is held in the shape of a substantially rectangular prism is shown, but the shape of the body 10 of the packaging container 1 is not limited to the shape of a substantially rectangular prism, but may be in the shape of a polygonal prism. It may be a packaging container 1 in which a body is formed. For example, three vertical fold lines may be provided on each of the front and back portions to form a substantially hexagonal prism-shaped body. For example, two vertical fold lines may be provided on the front part and three vertical fold lines may be provided on the back part to form a substantially pentagonal body.

In the above embodiment, the upper seal part 9 shows an example in which the entire area is sealed, but the configuration of the upper seal part 9 is not limited to the example of the embodiment. For example, it may be a packaging container in which extraction plugs are provided in the upper seal part 9 and the side seal parts 41 and 42.

In the above embodiment, the upper seal part 9 shows an example in which the entire area is sealed, but the configuration of the upper seal part 9 is not limited to the example of the embodiment. For example, as shown in FIG. 9, the packaging container 1B may have a shape in which a pouring nozzle 90 is formed to pour out the contents. Further, as shown in FIG. 10, the packaging container may be provided with a spout 92 made of a plastic molded product on the top seal portion 9 and side seal portions 41, 42. Even with such packaging containers 1B and 1C, the shape of the container can be made uniform, packaging efficiency can be improved, and transportation efficiency can also be improved, as in the above embodiment.

The packaging containers according to each of the above embodiments can be applied to many common pouches currently on the market. As a result, there is no need to use a special bag-making machine or filling device, and bags can be made and filled without major modifications to the devices currently used for bag-making and filling. For example, a fold line can be formed in advance on a film sheet constituting a packaging container, and the fold line can be used to form and fill bags using conventional equipment to manufacture the packaging container. In other words, there is no need to prepare a special device for forming fold lines, and a packaging container that improves transportation efficiency can be easily manufactured.
In addition, general bag-making equipment is often equipped with an embossing device as a general-purpose or optional option, and in that case, it can be implemented by simply preparing a mold and changing it without requiring any major modifications to the equipment itself. .

1, 1B, 1C... Packaging container 2... Front part 3... Back part 7... Adhesive part 8... Storage part 9... Upper seal part 10... Body part 41, 42... Side seal part 43... Lower seal part 50... Bottom part 61, 62...Vertical fold line 63...Bottom fold line 64a, 64b...Second vertical fold line 411, 421...Inner edge

Claims (7)

a body having a front part and a back part made of a film sheet;
a bottom part made of the film sheet and provided at the lower part of the body part;
a side seal part that joins the front part and the back part;
a lower seal portion that seals the body portion and the bottom portion;
a vertical fold line provided on the body and extending in the vertical direction to guide bending of the body;
an adhesive part that adheres the side seal part to the body part in a folded state;
Equipped with
packaging container. The position of the adhesive part in the vertical direction includes the position of the horizontal end of the lower seal part in the vertical direction.
The packaging container according to claim 1. a second vertical fold line disposed on the inner edge in the width direction of the side seal part and guiding the bending of the side seal part;
The packaging container according to claim 1 or claim 2. The packaging container according to any one of claims 1 to 3, wherein the vertical fold line is provided at two or more locations spaced apart in the width direction of the body. The packaging container according to any one of claims 1 to 4, wherein the vertical fold line is provided on at least one of the front part and the back part. Claims 1 to 5, wherein the body is bent along the vertical fold line and maintained in a substantially prismatic shape when the storage section surrounded by the body and the bottom is filled with an item to be packaged. The packaging container described in any one of the following. The vertical fold line is formed at two locations spaced apart in the width direction on the front part and the back part, respectively,
Claims 1 to 3, wherein the body is bent along the vertical fold line and maintained in a substantially rectangular prism shape when the storage section surrounded by the body and the bottom is filled with an item to be packaged. 5. The packaging container according to any one of 5.

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