WO2022202787A1

WO2022202787A1 - Fluid-filled bag-shaped container

Info

Publication number: WO2022202787A1
Application number: PCT/JP2022/013080
Authority: WO
Inventors: 剛士川幡; 悠矢島; 英司荒木
Original assignee: 大和製罐株式会社
Priority date: 2021-03-26
Filing date: 2022-03-22
Publication date: 2022-09-29
Also published as: JP2022150846A

Abstract

The present invention improves the freedom in design of a bag-shaped container having an injection hole for injecting a fluid.　A bag-shaped container in which sheet-like container materials 3 having a fluid filling room 7 that maintains a shape by expanding when filled with a fluid are overlapped with each other, at least peripheral edge parts of the container materials 3 being bonded to each other to provide in the container a hollow portion 6 for accommodating contents. The bag-shaped container comprises: a partitioning/bonding part 10 that linearly bonds the overlapped container materials 3 together; a flap part 9 that is partitioned by the partitioning/bonding part 10 from a portion of the container materials 3 that serves as an outer wall part of the hollow part 6, the flap part 9 being provided apart from the portion serving as the outer wall part of the hollow part 6; an injection hole 11 that is formed in a portion of the container materials 3 that constitutes the flap part 9; and a path 12 that extends through the partitioning/bonding part 10, partitioning the flap part 9 and the fluid filling room 7, to permit communication between the injection hole 11 and the fluid filling room 7, the path 12 being air-tightly closed when the fluid filling room 7 is filled with the fluid.

Description

Fluid-filled bag-like container

The present invention is a bag-like container composed of a sheet material in which two films are laminated, and a filling portion (cell) formed between the films is pressurized and filled with a fluid such as air. The present invention relates to a container configured to maintain a three-dimensional shape by expansion pressure caused by a force.

Conventionally, various containers of this type have been proposed. For example, Japanese Patent Application Laid-Open No. 2018-95267 discloses that a plurality of air-filled portions (cells) are formed in both the side wall portion and the bottom portion. describes a bag-like container constructed so that air can be filled from a single air injection hole in each of the cells. The container described in JP-A-2018-95267 forms a plurality of cells by joining two sheets of synthetic resin films that are superimposed on each other with a plurality of linear seal portions that cross each other, for example, in a grid pattern. Each cell is communicated by forming a part of the seal portion as a non-bonded ventilation passage. A sheet made of two synthetic resin films joined in this way is used as a container material, and the container material is folded in two into a bag shape, and the folded part is pushed inside the bag to reverse the valley fold. Mountain fold. By doing so, two valley fold lines parallel to the mountain fold line are formed on both sides of the mountain fold line, which is the folding line for folding the container material in two. A portion of a predetermined width sandwiched between the two valley fold lines becomes the bottom of the container. A line obliquely connecting the intersection of the side edge seal portion joining the side edge portions of the two container materials and the mountain fold line and a predetermined point of the two valley fold lines. The container materials that have been piled up due to the mountain folding are joined together to form triangular pleats. The pleats are formed by processing for stabilizing the shape, and even if there are cells inside, they are not filled with air.

The cells formed in the bottom and side walls (peripheral wall) are communicated with each other by partially non-adhesive sealing portions that separate the cells. An injection hole is formed which communicates with one of the cells. Specifically, the upper edge on the side opposite to the bottom is a portion where the edges of the container material folded in half are overlapped, and the spout is fitted and joined to the upper edge. The injection hole is formed on the upper edge side at a corner portion with one of the side edges. This injection hole is a hole made in one of the two synthetic resin sheets that constitute the cell, and the cell with this injection hole is different from the cells formed on the side walls and bottom. It has a different shape. This is because the cells are not filled with air to expand. Between the two synthetic resin films forming the cell with the injection hole open, an air passage extending linearly along the side edge from the cell toward the other cell is formed. It is After air is injected into each cell through the injection hole, a part of the air passage is closed by welding the synthetic resin films to each other, so that each cell on the side wall and bottom is cut off from the outside and is inflated by the air pressure. state.

In the conventional container described above, an injection hole is provided in a corner portion surrounded by an upper edge portion and one side edge portion of a sheet-like container material folded into a bag shape. Since this injection hole is an essential part of the structure of the container, the outline of the container as a whole may be a so-called rounded shape, a shape with a gently rounded shoulder, or a tapered spire shape. In that case, the injection hole becomes an obstacle, making it difficult to adopt such a shape, and the injection hole impairs the degree of freedom in design. In addition, in the structure of the conventional container, the injection hole is provided at the corner portion described above, and the corner portion is a part of the outer appearance of the container, that is, a part of the side wall portion (peripheral wall portion). The injection hole is provided at a portion forming the appearance of the container. Since the injection hole portion (the cell with the injection hole open) remains in the form of a thin sheet without being filled with air, compared to the cells on the other side edge side that are swollen with air. and the shape is greatly different. In other words, the left-right symmetry of the container is lost, and depending on the type of contents, the container may be difficult to adopt, or the container may be limited in use, and there is room for improvement.

The present invention has been made with a focus on the above-mentioned technical problems, and aims to provide a bag-like container with excellent design freedom.

In order to achieve the above object, the present invention provides a sheet-like container material having a fluid-filled chamber that maintains its shape when inflated by being filled with a fluid, and at least a peripheral edge of the container material that has been overlapped. In a fluid-filled bag-like container having a three-dimensional shape having a hollow portion inside for containing a content by joining the parts to each other, the container materials overlapped with each other are linearly formed so as to form the hollow portion. and a pleat that is separated from a portion of the container material that will be the outer wall of the hollow portion and separated from the portion that will be the outer wall of the hollow by the partition joint. an injection hole formed in a portion of the container material that constitutes the pleated portion; and a passage that communicates with the fluid-filled chamber and that is closed in an airtight state when the fluid-filled chamber is filled with the fluid.

In this invention, the container material includes a first sheet portion and a second sheet portion facing each other and having the fluid-filled chamber, and at least the first sheet portion and the second sheet portion A part of the peripheral portion of one of the sheet portions has a predetermined location on the peripheral edge portion of the one of the sheet portions as a bending point, and is convex outward from the hollow portion at the bending point. The portions of the peripheral portion that are bent and have a predetermined length on both sides of the bending point are aligned and joined together, and are positioned on a bending line that passes through the bending point and are a predetermined length from the bending point. A portion of the peripheral portion is joined along a line connecting the joined portions of the predetermined length, and the portion joined along the line becomes the division joint portion and the fold portion. may be formed.

In the present invention, one half of the container material folded in two forms the first sheet portion, and the other half forms the second sheet portion. The folding point is provided at a predetermined length away from the top of the bottom side where the container material is folded in two, in the peripheral edge portion with the second sheet portion, and the bending point is provided on both sides of the folding point. The length up to the bottom-side vertex is defined as the portion of the predetermined length, and the bottom-side vertex and the bending line passing through each of the bending points in the first sheet portion and the second sheet portion A portion joined along a line connecting the points of the predetermined length becomes the partition joint portion, and the fold portion is formed by the partition joint portion, the bending line, and the peripheral edge portion, and the first sheet A bottom portion may be defined by four sides defined by a line connecting intersections of the dividing joint portion and the bending lines of the second sheet portion and the second sheet portion, and the bending lines.

According to this invention, the hollow portion containing the content is partitioned by the partition joint, and the contour shape of the hollow portion substantially determines the overall shape of the product, which is the container containing the content. On the other hand, an injection hole for injecting a fluid such as air into the fluid filling chamber is provided in a fold portion that is connected to the outside of the division joint portion that divides the hollow portion. Therefore, even if the injection hole is an essential constituent part, the pleats in which the injection hole is provided do not become a part that determines the shape or outline of the container as a whole by folding it. The provision hardly constrains the design, such as the shape or contour of the container. That is, in the configuration of the container according to the present invention, the degree of freedom in designing the container can be improved.

In addition, since the injection hole does not particularly restrict the shape of the container, it is possible to easily maintain the left-right symmetry or top-bottom symmetry of the shape as a whole.

In particular, in the case where the above folds are provided in order to form a three-dimensional shape by stacking sheet-like container materials, the filling holes may be formed in the folds, so that the folds can be effectively utilized. can. In other words, since there is no need to separately provide a special fold for the injection hole, the overall structure and manufacturing process can be simplified.

It is a front view which shows an example of the container which concerns on this invention. It is a perspective view of the container. It is a front view which shows the state which attached the pump type extrusion apparatus to the container and was made into the product. 2 is a partially enlarged cross-sectional view taken along line IV-IV of FIG. 1; FIG. FIG. 3 is a plan view showing a container material in which two films are laminated and an injection hole is formed. FIG. 4 is a plan view showing the films joined together to form a fluid-filled chamber; It is a top view which shows the state which further formed the notch part. FIG. 3 is a perspective view showing a state in which the container material is folded; FIG. 4 is a plan view showing a welded portion of the pleat portion; FIG. 4 is a plan view showing welded portions of outer joint portions of respective sheet portions; It is a top view which shows the state which trimmed. FIG. 4 is a plan view showing a state in which the container material is separated into portions corresponding to one container; It is a front view which shows the state which attached the spout.

FIGS. 1 and 2 show a container 1 according to the present invention, and FIG. 3 shows a state in which a pump-type extrusion device 2 is attached to the container 1 after it is filled with contents, and the product is made into a product. A container 1 shown here is formed in a bag shape by a sheet-like container material 3, and a spout 4 is attached to the upper edge portion. The spout 4 is attached to the bag-shaped body portion 5 of the container 1 by being sandwiched between container materials 3 and welded together, as is conventionally known. A pump-type extrusion device 2 is attached to the spout 4 . The pump-type extrusion device 2 includes a cap 2a screwed onto the spout 4, and a nozzle portion 2b connected to a pump (not shown) that can be pushed down with respect to the cap 2a.

The body portion 5 is formed by stacking the container materials 3 and joining their peripheral edges so as to form a hollow portion 6 having a predetermined volume in order to accommodate predetermined liquid contents such as cosmetics and beverages. is configured as Two sheets of the container material 3 may be overlaid, or one sheet of the container material 3 may be folded in half and overlaid. If one sheet of container material 3 is folded in two and overlapped, the number of joints can be reduced, so the structure or manufacturing process of the container 1 can be simplified accordingly, and the degree of freedom in design can be increased.

The container material 3 is constructed by laminating two sheets of

films

3a and 3b, and as shown in FIG. A bonding portion serves as a fluid-filled chamber (hereinafter referred to as a cell) 7 filled with a fluid such as air.

These

films

3a and 3b can be configured appropriately. As an example, the film 3a constituting the inner surface of the container 1 is configured to suppress permeation of gas with an adhesive layer thermally bonded to the other film 3b constituting the outer surface of the container 1. A laminated film obtained by laminating a barrier layer and an inner layer disposed on the innermost side of the container and in contact with the contents can be employed. The adhesive layer is preferably composed of a resin film having heat-sealing properties. As the adhesive layer, for example, a resin film such as a polyolefin-based resin or a polyester-based resin can be used. Among these resin films, In particular, it is preferable to use a film made of linear low-density polyethylene resin (hereinafter referred to as LLDPE). The barrier layer suppresses the permeation of, for example, oxygen, water vapor, aromatic substances, etc., and can be composed of a resin film or coating having an oxygen barrier property, in particular, the permeability of oxygen gas being lower than that of other gases. . When the barrier layer is composed of a coating film, the adhesive layer or the inner layer is coated with a coating mainly made of a synthetic resin material impermeable to oxygen and water vapor, and then dried to form the coating. Examples of the resin film and synthetic resin material constituting the barrier layer include ethylene-vinyl alcohol copolymer. As the inner layer, like the adhesive layer, it is preferable to use a resin film having heat-sealing properties such as a polyolefin-based resin or a polyester-based resin, and it is particularly preferable to use a film made of LLDPE.

The other film 3b, which constitutes the outer surface of the container 1, can employ a film formed by laminating a substrate layer, which is the base, and an outer layer arranged on the outermost side of the container. The base material layer is thermally adhered to the film 3a on the inner surface side, for example, and is composed of a resin film having heat-sealing properties. Similar to the adhesive layer, a resin film such as a polyolefin-based resin or a polyester-based resin can be used as the base material layer, and it is particularly preferable to use a film made of LLDPE. The use of an LLDPE film facilitates thermal bonding between the base material layer and the adhesive layer, as compared with the use of other films. Adhesion strength can be improved. As the outer layer, for example, it is preferable to use a resin film such as a polyamide-based resin, a polyolefin-based resin, or a polyester-based resin, and it is particularly preferable to use a nylon (registered trademark) resin film.

In the container 1 shown in FIGS. 1 to 3, one sheet of the container material 3 is folded and overlapped, and in that state, the peripheral edge portions are joined to each other, or the spout 4 is sandwiched and joined to form a bag-like main body. A portion 5 is formed. A portion of the container material 3 that is folded in two to form one outer wall portion of the main body portion 5 serves as the first sheet portion 5a in the present invention, and the other portion serves as the second sheet portion 5b in the present invention. ing. A boundary portion between the first sheet portion 5a and the second sheet portion 5b is a portion corresponding to the bottom portion 5c having a predetermined width. In other words, the portions on both sides of the folding line L1 along which the container material 3 is folded in two form the bottom portion 5c. The two-fold line L1 is indicated by a dashed line in FIG. It extends from the line L1 in the center, and a bottom portion with a predetermined width (breadth) is generated.

In the container 1 shown in FIGS. 1 to 3, the cells 7 are formed in a U shape in each of the

sheet portions

5a and 5b. That is, the peripheral edges of the

laminated films

3a and 3b constituting the container material 3 are joined (welded) with a predetermined width, and the shape of the outer peripheral side of the cell 7 is shaped by the linear outer joining portion 8a. It is decided. In addition, at the central portion of each

sheet portion

5a, 5b, an inner joint portion (welding portion) 8b having a shape substantially similar to the contour shape of each

sheet portion

5a, 5b is provided. , 3b are joined (welded). A portion partitioned by the outer joint portion 8a and the inner joint portion 8b becomes a cell 7 that is inflated by injection of a fluid such as air and maintains its shape by the pressure. The portion surrounded by the inner joint portion 8b has a hollow shape surrounded by the

films

3a and 3b because the

films

3a and 3b are not joined, and the inner joint portion 8b is in a closed shape. Therefore, fluid such as air does not enter and exit the hollow portion, and when the

sheet portions

5a and 5b are in a stretched state, the central portions F of the

sheet portions

5a and 5b are The surface becomes almost flat and smooth.

Further explaining the shape of the container 1 as a whole, by forming the corners of the container material 3 into an arc shape (R shape) with a large radius, the so-called shoulder portion of the container 1 has a smoothly rounded shape. there is The lower corner portions of the

seat portions

5a and 5b are configured to have a rounded shape so as to balance with the rounded shoulder portions. As described above, it is configured so that a bottom surface having a predetermined width is formed by receiving the portion corresponding to the bottom 5c, and the cell 7 expands in a state where the lower portion of the container 1 expands according to the portion corresponding to the bottom 5c. Such bulging shape of the cells 7 becomes the shape of the container 1 as a whole, or the shape that the container 1 impresses. Therefore, in the examples shown in FIGS. 1 to 3, the shape of the lower corner portion in the expanded state of the cell 7 is a rounded shape similar to the shoulder portion. Such a shape is formed so that the

films

3a, 3b and the

sheets

5a, 5b, which are joined to each other, are formed at the right and left corners formed by folding one sheet of container material, and the approximately triangular pleats 9 are formed. It is made by joining (welding) along diagonal lines so as to partition. The oblique linear joints (welded parts) correspond to the partition joints 10 in the present invention. Therefore, the cell 7 has a shape in which the

sheet portions

5a and 5b (outer wall portions) are partitioned by the outer joint portion 8a, the inner joint portion 8b, and the partition joint portion 10 described above. The examples shown in FIGS. 1 to 3 are U-shaped. Moreover, not only the

films

3a and 3b but also the

sheet portions

5a and 5b are linearly joined at the outer joint portion 8a and the compartment joint portion 10, so that the hollow portion 6 to be filled with the contents is , the outer joint portion 8a and the compartment joint portion 10 define a rounded shape as a whole.

Therefore, the pleats 9 are flaky portions formed outside the cells 7 and the hollow portions 6, and are symmetrically provided in the example shown in FIGS. Further, since the pleats 9 are provided on each of the first sheet portion 5a and the second sheet portion 5b, a total of four pleats 9 are provided in the example shown in FIGS. An injection hole 11 and a passage 12 are formed in one of the folds 9 .

These injection holes 11 and passages 12 are parts for injecting fluid (specifically, air) into the cells 7 described above. As described above, the pleated portion 9 is formed by joining the outer peripheral portions in a triangular shape, so that the central portion thereof serves as a non-bonded portion 9a where the

films

3a and 3b are separated. An injection hole 11 opening in the non-bonded portion 9a is formed in one of the films 3b (for example, the outer side). Further, passages 12 are formed in the section joints 10 that separate the folds 9 provided with the non-adhesive portions 9 a with the injection holes 11 from the cells 7 . When the

films

3a and 3b are linearly joined (welded) at the section joining portion 10, the passage 12 is a portion where the non-adhesive portion 9a and the cell 7 are communicated with each other without being partially joined. With the cell 7 sufficiently filled with air, the passage 12 is hermetically closed by welding.

As described above, in the container 1 according to the present invention, the injection hole 11 and the passage 12, which are essential for filling the fluid into the cells 7, are formed according to the shape of the container 1 as a whole and the hollow portion for filling the contents. Since the filling hole 11, the passage 12, etc. are provided in the folds 9 that are formed along with the determination of the shape of the container 6, the design of the container 1 is not restricted, and the container 1 has a high degree of design freedom. can be done. In particular, the folds 9 are formed when the overall shape of the container 1 is left-right symmetrical or front-rear symmetrical. It is possible to prevent the folds 9 from interfering with the symmetry of the shape of the container 1 as a whole, and in this respect as well, the design as a whole or its degree of freedom can be improved.

Next, the configuration of the container 1 described above will be described in more detail by its manufacturing procedure. FIG. 5 shows a container material 3, and the container material 3 shown here is in a state in which roll-

wound films

3a and 3b are pulled out from rolls and overlapped (laminated). A portion divided by a straight line in FIG. 5 corresponds to one container 1, and an injection hole 11 is formed at a predetermined location by punching or the like.

A portion corresponding to one container 1 on the tip side of the container material 3 is linearly joined (sealed) to partition the cell 7 and the non-bonded portion 9a described above. An example of this is shown in FIG. 6. A portion corresponding to one container 1 is linearly joined along the outer peripheral edge, and this substantially rectangular joined portion corresponds to the outer joint portion 8a described above. In addition, the inner joint portion 8b described above is set in the central portion of each of the upper and lower portions in FIG. is joined to Therefore, a U-shaped cell 7 is formed surrounding the central portion F, which has a substantially flat surface when not filled with air.

A flat portion 13 that maintains a flat state by not filling with air is provided in the center portion of the rectangular portion corresponding to one container 1 of the container material 3 and the portion corresponding to the bottom portion 5c described above. . In the example shown in FIG. 6, the flat portion 13 is four triangular portions radially arranged around the center point of the portion corresponding to one container 1, and each triangular portion consists of three It may be either a portion formed by welding on sides or a portion formed by welding on triangular surfaces. These four triangular flat portions 13 are sized to fit within the bottom portions 5c having a predetermined width on both sides of the two-fold line L1.

In addition, the left and right triangular flat portions 13 in FIG. 6 are connected to the outer joint portions 8a by linear welding portions 14 reaching the outer joint portions 8a on the left and right side edges. This linear welded portion 14 is a portion where the

respective films

3a and 3b are linearly welded along the above-described two-fold line L1. As will be described later, the container material 3 is folded along this two-fold line L1. Therefore, if the linear welded portion 14 has a certain width, the container material 3 can be easily folded. A linear non-welding portion may be provided inside.

A bottom section welded portion 15 is provided so as to be perpendicular to the linear welded portion 14 . The bottom section welded portion 15 is a portion where the

respective films

3a and 3b are linearly welded, and two portions are formed from the center of the container material 3 with a predetermined interval in the width direction. That is, the portion between these two bottom section welding portions 15 bulges downward of the container 1 to form the bottom surface of the container 1 . Therefore, the bottom section welded portion 15 is for defining the bottom surface, and its length is substantially the same as the width of the bottom surface. Then, the peripheral portion (lower portion) of the container material 3 is bent along a line L2 connecting the ends of the bottom section welded portions 15 on the side of the

sheet portions

5a and 5b, and one side is the first sheet portion 5a or the other is bent. It becomes the 2nd sheet|seat part 5b, and the other becomes a bottom surface. Therefore, this line L2 corresponds to the "bending line" in the present invention, and the intersection point Pc between the bending line L2 and the outer joint portion 8a corresponds to the "bending point" in the present invention. In other words, this bending point is a point separated by a predetermined distance on both sides from the bottom side vertex of the present invention, which is the intersection of the two-fold line L1 and the outer joint portion 8a.

Further, on the outer joint portion 8a, each film 3a is drawn by a line (straight line or curved line) connecting a point at a predetermined distance from the bending point Pc to the upper and lower end portions and the tip portion of the bottom section welded portion 15. , 3b are welded, and this linear welded portion serves as the partition joint portion 10 described above. The above-described injection hole 11 is opened in a portion outside the partition joint 10, that is, in any one of the non-bonded portions 9a separated from the cells 7 by the partition joint 10. As shown in FIG. The above-described passage 12 is formed in the partition joint portion 10 that partitions the cell 7 and the non-adhesive portion 9a to which the injection hole 11 is open.

Next, a notch portion 16 is formed for exposing the base material layer of the film 3b that constitutes the outer surface of the container 1 . As shown in FIG. 7, a notch portion 16 is formed by, for example, circularly cutting (punching) the film 3a that forms the inner surface of the container 1 at a portion of the outer joint portion 8a near the folding line L1. do. This notch portion 16 is formed by mountain-folding the container material 3 along the two-fold line L1 (bending it convexly toward the inside of the container 1) and valley-folding it along the aforementioned folding line L2 (bottom of the container 1). By bending so as to protrude toward the side), it is provided at a position overlapping the outer joint portion 8a at a location symmetrical about the bending line L2. Therefore, the base material layer is exposed at the notch portion 16 at the overlapping portion. Since the base layer has the same composition as the adhesive layer in the other film 3a, the exposed portion of the base layer functions as a heat-bondable adhesive layer.

After that, the container material 3 is mountain-folded along the two folding lines L1 and valley-folded along the folding lines L2 on both sides thereof. This state is schematically shown in FIG. 8 as a perspective view. When the container material 3 is folded in this way, at the mountain-folded and valley-folded portions, i.e., at the portion near the bottom of the container 1, the two double-layered portions overlap each other to form a four-layered portion, and the upper portion is double-layered. becomes. In this state, first, of the two-ply portion, the oblique section joint portion 10 described above, a part of the outer joint portion 8a forming a triangular shape together with the section joint portion 10, and the above-mentioned folding line L2 The part forming the triangular shape is linearly welded. The triangular welded portions are hatched in FIG. In this case, the films 3a forming the inner surface of the container 1 face each other and come into contact with each other. Then, the

sheet portions

5a and 5b that are in contact with each other by the film 3a on the inner surface side are heat-sealed. Thus, four folds 9 are formed. In this case, the portion of the partition joint 10 that becomes the passage 12 passes through the partition joint 10 without bonding so that the cell 7 and the non-bonded portion 9a inside the fold portion 9 are communicated with each other. Leave to form.

Next, the entire portions of the outer joint portion 8a, which are double-layered at the left and right side edges of the container 1, are linearly welded. The welded portions are indicated by hatching in FIG. In that case, in the folds 9, the substrate layer is exposed at notches 16 provided at locations corresponding to the sides of the triangular portions described above, so that the sides of the folds 9 overlapping each other are exposed. The edges are joined by the substrate layer. That is, the two folds 9 on the left and right sides of the container 1 are closed. This is to prevent the pleats 9 from extending indiscriminately when the portion corresponding to the bottom surface of the container 1 is expanded in the thickness direction of the container material 3 (the direction perpendicular to the paper surface of FIG. 9). be.

After the

films

3a and 3b and the

sheet portions

5a and 5b are joined (welded) as described above, trimming is performed to adjust the outline of the container 1. Specifically, as shown in FIG. 11, the corner portion of a rectangular portion corresponding to one container 1 of the container material 3 is cut into an arc shape with a predetermined radius. The corner portions are two corner portions corresponding to the shoulder portions of the container 1 and two corner portions corresponding to the vertices of the triangular fold portion 9 described above.

The outer joint 8a is welded, and the bag-like container material 3 whose contour is adjusted by trimming is cut off for each portion corresponding to one container 1.例文帳に追加FIG. 12 shows the container blank 3 separated in this way. In this state, the upper edges of the

sheet portions

5a and 5b are not joined to each other and are open. Therefore, as shown in FIG. The upper edge of 5b and the spout 4 are welded together to close the upper end of the container 1. Therefore, the portion surrounded (or closed) by this upper edge, the outer joint portion 8a, and the portion corresponding to the bottom portion 5c becomes the hollow portion 6 to be filled with the content.

When the spout 4 is attached as shown in FIG. 13, the main body portion 5 is in a state in which the sheet-like container material 3 is folded, so it does not have a three-dimensional structure or a self-supporting structure. In order to obtain a three-dimensional structure or a self-sustaining structure, air as an example of a fluid is blown from an injection hole 11 formed in one fold portion 9 . Since the injection hole 11 communicates with the cell 7 via the adherend portion 9a inside the pleated portion 9 and the passage 12, the cell 7 expands due to the air pressure, and the whole becomes a three-dimensional structure. In this case, the bottom-corresponding portion 5c is pushed downward to form a flat bottom surface or a valley-shaped bottom surface protruding inwardly of the container, so that the structure can stand on its own. After the cell 7 is inflated to a necessary and sufficient degree, the passage 12 is closed by heating the

film

3a and 3b while sandwiching the portion of the passage 12.例文帳に追加In addition, since the central portion F surrounded by the inner joint portion 8b is closed to the cells 7, it maintains a smooth, nearly flat surface.

The contents are filled from the spout 4 of the container material 3 or the container 1, which has a three-dimensional structure or a self-standing structure, and the spout 4 is attached with the pump type extrusion device 2, or another appropriate cap is attached and sealed. By doing so, it becomes a product.

It should be noted that the present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications. For example, the shape and number of fluid-filled chambers (cells) may be any shape and number depending on design requirements and requirements based on contents. Further, the pleats can be appropriately formed according to the shape of the container, and the filling holes may be formed in the pleats. It may be formed so as not to impair the symmetry of the shape of the container, such as the portion and the upper edge. Therefore, the shape of the folds in the present invention may be an appropriate shape other than the triangular shape.

Claims

Sheet-like container materials having a fluid-filled chamber that maintains its shape when filled with a fluid to expand are superimposed, and at least peripheral edges of the superimposed container materials are joined to each other to form a hollow for containing contents. In a fluid-filled bag-shaped container having a three-dimensional structure having a part inside,
a partition joint that linearly joins the container materials that are superimposed on each other so as to form the hollow portion;
a pleated portion separated from a portion of the container material that will be the outer wall portion of the hollow portion by the partition joint portion and provided away from the portion that will be the outer wall portion of the hollow portion;
an injection hole formed in a portion of the container material forming the folds;
The injection hole and the fluid-filled chamber are communicated by penetrating through the dividing joint portion that partitions the fold portion and the fluid-filled chamber, and the fluid-filled chamber is filled with the fluid to create an airtight state. A fluid-filled bag-like container, comprising a closed passageway.
In the fluid-filled bag-like container according to claim 1,
the container material includes a first sheet portion and a second sheet portion facing each other, each having the fluid filling chamber;
A portion of the peripheral portion of at least one of the first sheet portion and the second sheet portion has a predetermined location on the peripheral edge portion of the one sheet portion as a bending point and is at the bending point. It is bent so as to protrude outwardly opposite to the hollow portion, and portions of a predetermined length on both sides of the bending point of the peripheral edge portion are aligned and joined together on a bending line passing through the bending point. and a part of the peripheral portion is joined along a line connecting a portion of a predetermined length from the bending point and the joined portion of the predetermined length, and joined along the line A fluid-filled bag-shaped container, wherein the folded portion serves as the division joint portion and the fold portion is formed.
In the fluid-filled bag-like container according to claim 2,
One half of the container material folded in two forms the first sheet portion, and the other half forms the second sheet portion,
The folding point is provided at a predetermined length away from the bottom-side vertex, which is the portion where the container material is folded in two, among the peripheral edge portions of the first sheet portion and the second sheet portion, A portion having a length up to the vertex portion on the bottom side on both sides of the bending point is the portion of the predetermined length,
The portion joined along a line connecting the bottom-side apex portion and the point of the predetermined length on the bending line passing through each of the bending points of the first sheet portion and the second sheet portion is the partition. The fold portion is formed by the division joint portion, the bending line, and the peripheral edge portion, which serves as a joint portion, and
A bottom portion is defined by a line connecting the intersections of the dividing joint portions and the bending lines of the first sheet portion and the second sheet portion, and a portion defined by the bending lines as four sides. A fluid-filled bag-like container characterized by: