JP2023145023A - 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, and a lower seal portion that seals the body portion and the bottom portion. The body portion is provided with a broken line shaped vertical folding line extending in a vertical direction to guide the bending of the body portion.SELECTED DRAWING: Figure 2

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, and a side seal part joining the front part and the back part, A broken vertical fold line is provided which extends and guides the bending of the body.

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 schematic diagram of the bottom surface of the packaging container according to the present embodiment. FIG. 2 is a schematic diagram showing a packaging mode of a packaging container filled with contents. It is a perspective view of the packaging container of a modification. It is a bottom view of the packaging container of a modification. It is a front view of the packaging container of a modification. It is a front view which shows the usage example 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 6.
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 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 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. It 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, the packaging container 1 has an open upper end 21 without the upper edge of the front part 2 and the upper edge of the back part 3 being joined, and the packaging container 1 is in a state before the packaged items are stored in the storage part 8. In this state, the packaging container 1 is manufactured 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 state where it can be distributed.

At least one of the front part 2 and the back part 3 is provided with broken vertical fold lines 61 and 62. 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 may be formed in a broken line shape and a straight line shape 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 that are 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 locations, so it is easy to form a bent portion. Therefore, the vertical fold line 61 including the pair of vertical lines 61a and 61b allows the front part 2 or the back part 3 to easily bend and 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 are provided. As a result, the above effects can be obtained.

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 vertical fold lines 61 and 62 are formed at positions 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.

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.

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. 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, although not shown in the drawings, as a result of the body 10 having a substantially rectangular prism shape, the gap in the vertical direction Z within 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. The amount of storage in the packaging container 1 relative to the volume of the packaging box is referred to as a packing ratio. If the packing ratio increases, the amount of transportation per packaging box will increase, resulting in a reduction in carbon dioxide emissions during transportation.

In addition, by making the vertical fold lines 61 and 62 of the packaging container 1 into broken lines, when pressing the film sheet in the thickness direction by embossing with a linear die to form the vertical fold lines, the unit area of the die is The pressing force becomes stronger, and a deep and uniform polygonal line 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.

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 portion 41 shown on the right side of FIGS. 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 left vertical fold line 61 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 or more and 1.1 or less, the bottom part 50 and the side seal parts 41, 42 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, 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 not only reduce the efficiency of storing in a generally rectangular storage box such as a cardboard box, but also make the storage work complicated. . In other words, the height H43 and the lengths L31 and L32 may be configured so that the following equation (1) holds true.

Furthermore, as shown in FIGS. 5 and 6, a value ρ2 (ρ2=L2 /L4) is in the range of 0.9 or more and 1.1 or less, as shown in FIG. 4, it is possible to form the body 10 in the shape of a substantially square prism. 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 portion 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, the body portion 10 has a substantially prismatic shape, and the side seal portions 41 and 42 are arranged in directions Y1 and Y1 from the side surfaces 33 and 23 of the body portion 10, respectively. It protrudes in the direction Y2. When the widths W41 and W42 of the side seal parts 41 and 42 are 5 mm or less, the protruding side seal parts 41 and 42 are less likely to interfere with packing, and the packing efficiency can be increased. From the perspective of improving packing efficiency, the lower limits of widths W41 and W42 are not particularly limited; The lower limit of 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. 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.

(Modified example)
FIG. 8 is a perspective view of a primary body of a packaging container 1A of a modified example. As shown in FIG. 8, adhesive portions 7 may be provided on the front or back surfaces of the side seal portions 41, 42. The adhesive part 7 is, for example, double-sided tape, adhesive, or the like. The adhesive part 7 is not particularly limited as long as the side seal parts 41 and 42 can be bonded to the body part 10 and the amount of protrusion from the body part 10 can be reduced. For example, the adhesive part 7 may be provided so as to cover almost the entire surface of the side seal part, as in the example shown in the side seal part 41 in FIG. , the adhesive portions 7 may be provided at a plurality of points on the side seal portion.
As described above, in the completed packaging container 1, the side seal portions 41 and 42 protrude outward. Therefore, an adhesive part 7 may be provided and the side seal parts 41 and 42 may be adhered to the front part 2 or the back part 3 via the adhesive part 7. Specifically, 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 bonded to the front part 2 or the back part 3 via the adhesive part 7. As a result, as shown in FIG. 9, 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. According to the packaging container 1A of the modified example, similarly to the above embodiment, when a plurality of packaging containers 1 are stored in the packaging box 100A, the porosity inside the packaging box 100A can be reduced. Therefore, the packaging container 1A of the modified example contributes to a reduction in carbon dioxide emissions during the distribution process of a packaged product containing an object to be packaged. In other words, it is possible to provide a packaging container 1 that is highly effective in reducing environmental load.

As shown in FIG. 8, a vertical fold line 64 may be provided on the inner edge portions 411, 421 of the side seal portions 41, 42 in the width direction Y. By providing the vertical fold line 64 on the inner edges 411, 421, bending at the inner edges 411, 421 is guided, and the front part 2 and the back part 3 can be easily opened in a direction in which the side seal parts 41, 42 are separated from each other. 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 vertical fold line 64 on the inner edges 411, 421, the side seal parts 41, 42 are easily bent toward the body 10, the amount of protrusion into the gap S100A of the packaging box 100A is reduced, and the body The shape can be maintained in a state where the side surfaces 33 and 23 of the body 10 are closer to a linear shape, and the body 10 is closer to a quadrangular prism shape. Therefore, the packaging container 1A of the modified example contributes to a reduction in carbon dioxide emissions during the distribution process of a packaged product containing an object to be packaged. 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 manufacturing of the packaging container of Example 1 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 Example 1 has the highest reduction rate in CO ₂ emissions during 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.

According to the above-mentioned packaging containers 1 and 1A, 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 can be roughly viewed with the object to be packaged stored therein. Can be made into a square prism shape. 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. 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.

According to the above-mentioned packaging containers 1 and 1A, 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 the vertical fold lines 61 and 62 are provided on the body part 10 of the packaging container 1 containing the object to be packaged. can be given a three-dimensional 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-mentioned packaging containers 1 and 1A, the body 10 is bent along the vertical fold lines 61 and 62 in a state where the storage portion 8 surrounded by the body 10 and the bottom 50 is filled with an object to be packaged. Since the shape is maintained in a prismatic or substantially quadrangular prism shape, the gap during storage in the packaging box 100A can be reduced and the packing efficiency can be improved.

Although one embodiment of the present invention has been described above, the technical scope of the present invention is not limited to the content of the above embodiment, etc., and various changes may be made to each component without departing from the spirit of the present invention. It is possible to add or delete.

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, 1A is shown in which the body 10 is held in the shape of a substantially square prism, but the shape of the body 10 of the packaging container 1 is not limited to the shape of a substantially square prism, but is a polygonal prism. The packaging container 1 may have a shaped body. 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, as shown in FIG. 10, 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. 11, 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, 1A, 1B, 1C...Packaging container 2...Front part 3...Back part 41, 42...Side seal part 8...Storage part 10...Body part 50...Bottom part 61, 62, 64...Vertical fold line 63...Bottom fold line

Claims (7)

a body having a front part and a back part made of a film sheet;
a side seal part that joins the front part and the back part;
Equipped with
A packaging container, wherein the body is provided with a broken vertical fold line that extends in the longitudinal direction and guides the bending of the body. The packaging container according to claim 1, wherein the vertical fold line is provided at two or more locations spaced apart in the width direction of the body. a bottom part made of the film sheet and provided at the lower part of the body part;
a lower seal part that seals the body part and the bottom part,
The length in the width direction between the inner edge of the side seal part and the vertical fold line located next to the inner edge is L, and the maximum height from the upper end of the lower seal part to the upper end of the bottom part. The packaging container according to claim 2, wherein a value ρ1 obtained by dividing L by H is 0.9 or more and 1.1 or less. The packaging container according to any one of claims 1 to 3, wherein the vertical fold line is provided on at least one of the front part and the back part. Claim 1: The package is made of the film sheet, has a bottom section provided at a lower part of the body section, and is configured to be able to stand on its own when a storage section surrounded by the body section and the bottom section is filled with an item to be packaged. 5. The packaging container according to claim 4. The packaging according to claim 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 the item to be packaged. container. The vertical fold line is formed at two locations spaced apart in the width direction on the front part and the back part, respectively,
Claim 5 or Claim 5, wherein the body is bent along the vertical fold line and maintained in a substantially quadrangular prism shape in a state where the storage portion surrounded by the body and the bottom is filled with the packaged item. 6. The packaging container according to 6.

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