Manufacturing method of pouch container

Abstract

This method for manufacturing a pouch container comprises: a step of fusing an inside resin layer at the end of a first film 11 and inside resin layers at the ends of one or a plurality of second films 12 and 13 together to form a pouch bag with one end thereof open; a step of molding a resinous mouth member 20 provided with a flange part and a rising part; a step of attaching a lower surface of the resinous flange part of the mouth member 20 to an outside resin layer of the first film 11 of the pouch bag so as to be integrated with a resin by any welding using ultrasonic waves, heat, or a high frequency; a step of filling a content from the open end of the pouch bag; and a step of fusing the one end and closing the pouch bag to seal an inside thereof.

Description

[Technical field]

[0001] The present invention relates to a method for manufacturing a pouch container having a mouth. By law Regarding. [Background technology]

[0002] A typical aluminum pouch that blocks light and oxygen has a structure in which a mouth (also called a spout) is inserted (for example, Patent Document 1). However, in an aluminum pouch with an inserted mouth, the mouth is made of resin, so light and oxygen can pass through the mouth during the distribution process, and the contents can deteriorate through the mouth.

[0003] In view of this, Patent Document 2 discloses an aluminum tube (laminated tube) having a membrane at its mouth as a container that can ensure oxygen barrier properties during the distribution process.

[0004] On the other hand, as a configuration for maintaining airtightness until immediately before use, Patent Document 3 discloses a pouch container having an upper surface formed of a thick disk with the opening in close contact with the disk.

[0005] Furthermore, as another configuration for maintaining the airtightness until immediately before use, Patent Document 4 discloses a pouch container in which the opening is attached to the upper surface with an adhesive layer made of adhesive. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication No. 2007 / 126044 [Patent Document 2] JP 2006-044768 A [Patent Document 3] Patent No. 3624132 [Patent Document 4] JP 2001-335081 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, a typical aluminum tube (laminated tube) such as that in Patent Document 2 has a thick upper surface around the mouth, and in a pouch configuration with a thick upper surface such as that in Patent Document 3, the upper surface is difficult to deform, so a large force is required to use the entire container, especially when there is only a small amount left.

[0008] On the other hand, when the mouth is fixed with an adhesive as in Patent Document 4, for example, if the pouch container is left in a hot and humid environment such as a bathroom or washroom, or if the pouch container is washed with water, the adhesive at the mouth may melt and the mouth may come off.

[0009] In view of the above circumstances, the present invention provides a method for manufacturing a pouch container in which the contents do not deteriorate from the mouth during distribution, no great force is required to use up the contents, and the mouth does not come off even when used in hot and humid conditions. [Means for solving the problem]

[0010] In order to solve the above problems, in one aspect of the present invention, a step of fusing a resin layer on the inside of an end portion of the first film and a resin layer on the inside of an end portion of one or more second films to form a pouch bag having an opening at one end; A step of molding a resin mouth member having a flange portion and an upright portion; a step of attaching a lower surface of the resin flange of the mouth member to an outer resin layer of the first film of the pouch bag by welding the resin integrally by any one of ultrasonic, heat, and high frequency; filling the pouch with contents through the open end; and a step of sealing the one end to close the pouch bag and seal the inside. A method for manufacturing a pouch container is provided. Effect of the Invention

[0011] According to one aspect, a method for manufacturing a pouch container is provided, in which the contents do not deteriorate from the mouth part during the distribution process, no great force is required to use up the contents, and the mouth part does not come off even when used in a hot and humid environment. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is an external view showing a pouch container according to a first configuration example of the present invention. [Diagram 2] 3 is a flow chart of a first manufacturing method for the pouch container of the first configuration example of the present invention. [Diagram 3] 1 is an exploded view of a pouch container according to a first configuration example of the present invention, showing the side, top, and mouth. [Figure 4] FIG. 2 is an explanatory diagram showing welding of films together to form a pouch bag of the first configuration example in the first manufacturing method. [Diagram 5] FIG. 4 is an overall explanatory view showing how the mouth portion is attached to the upper film in the first manufacturing method. [Figure 6] FIG. 4 is an explanatory diagram showing how the mouth portion is welded to the upper film by ultrasonic waves in the first manufacturing method. [Figure 7] FIG. 11 is an explanatory diagram showing how the mouth portion is fused to the upper film by heat from a heating element in the first manufacturing method. [Figure 8] FIG. 4 is an explanatory diagram showing how the mouth portion is fused to the upper film by high frequency in the first manufacturing method. [Figure 9] FIG. 13 is an explanatory diagram showing the state in which the contents are being filled into the pouch from the rear end. [Figure 10] FIG. 13 is a diagram illustrating closing of the rear end of the pouch bag. [Figure 11] A diagram explaining how to fold the rear end (a diagram showing the pouch bag turned upside down before the bottom end is folded in). [Figure 12] A diagram explaining how to fold the rear end (showing the pouch bag with the center of the bottom end pressed). [Figure 13] A diagram explaining how to fold the rear end (showing the state after the bottom end has been folded in). [Figure 14]4 is a flow chart of a second manufacturing method for the pouch container according to the first configuration example of the present invention. [Figure 15] FIG. 13 is an explanatory diagram showing how the mouth portion is attached to the upper film by insert molding and formed integrally with the upper film in the second manufacturing method. [Figure 16] 5 is a flow chart of a third manufacturing method for the pouch container according to the first configuration example of the present invention. [Figure 17] FIG. 13 is an explanatory diagram showing the mouth portion and the adhesion of the upper film in the third manufacturing method (a diagram showing the state in which the mouth portion is welded to the upper film material). [Figure 18] An explanatory diagram showing the mouth portion and adhesion of the top film in the third manufacturing method (a diagram showing the state in which the end of the top film to which the mouth portion is attached is fused to the end of the side film). [Figure 19] FIG. 13 is an explanatory diagram showing the mouth portion and adhesion of the upper film in the third manufacturing method (a diagram showing the state in which the end of the lower side film and the end of the upper film are heat sealed). [Figure 20] FIG. 13 is an explanatory diagram of attaching the mouth portion to the upper film by a heating element in the third manufacturing method. [Figure 21] 5 is a flow chart of a fourth manufacturing method for the pouch container according to the first configuration example of the present invention. [Figure 22] FIG. 13 is an explanatory diagram showing how the mouth portion is attached to the upper film and formed integrally therewith by in-mold molding in the fourth manufacturing method. [Diagram 23] FIG. 4 is an exploded view of a pouch container according to a second configuration example of the present invention, showing the side, top, and mouth. [Figure 24] FIG. 11 is an exploded view of a pouch container according to a third configuration example of the present invention, showing the side, top, and mouth. [Diagram 25] FIG. 11 is an external view showing a pouch container according to a fourth configuration example of the present invention. [Figure 26] FIG. 13 is an external view showing a pouch container according to a fifth configuration example of the present invention. [Figure 27] FIG. 13 is a top external view showing a pouch container according to a sixth configuration example of the present invention. [Figure 28] FIG. 28 is a cross-sectional view showing the pouch container according to the sixth configuration example of the present invention shown in FIG. 27. [Figure 29] FIG. 13 is an external view showing a pouch container according to a seventh configuration example of the present invention. [Diagram 30] FIG. 13 is a cross-sectional view showing a pouch container according to a seventh configuration example of the present invention. [Diagram 31] FIG. 13 is an explanatory diagram showing how films are welded together to form a pouch bag according to a seventh configuration example of the present invention. [Diagram 32] FIG. 32 shows the state in which the mouth portion has been welded at regular intervals to the sheet before cutting in FIG. 31 . [Diagram 33] FIG. 13 is a top external view showing a pouch container according to an eighth configuration example of the present invention. [Diagram 34] FIG. 13 is a bottom external view showing a pouch container according to an eighth configuration example of the present invention. [Diagram 35] A diagram showing the pouch container of the present invention combined with a cap that is opened by twisting. [Diagram 36] Exploded view of the cap area. [Figure 37] FIG. [Figure 38] 36A to 36C are diagrams illustrating the procedure for opening the cap in FIG. 35. [Figure 39] FIG. 38 shows the state in which the stopper is closed. [Diagram 40] A diagram explaining how the top film is broken through by the bottom edge of the plug as the cap rotates. [Diagram 41] FIG. 40 shows the central region of the circular top film. [Diagram 42] In Figure 40, the cap is removed and the top film is viewed from the mouth side. [Diagram 43] FIG. 2 is an explanatory diagram showing the pouch container of the present invention when used as a refill container. [Diagram 44] FIG. 11 is a diagram of a double container equipped with a pouch container according to a fifth configuration example of the present invention as an inner container. [Diagram 45] FIG. 13 is a diagram showing an example in which a push pump is attached as a discharge mechanism to the mouth of the double container of the present invention. [Figure 46] 46 is a cross-sectional view of the push pump of FIG. [Figure 47]FIG. 13 is a diagram showing an example in which a push pump with a tray is attached as a discharge mechanism to the mouth of the double container of the present invention. [Figure 48] FIG. 13 is a diagram showing an example in which a dispenser is attached to the mouth of the double container of the present invention as a dispensing mechanism. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following drawings, the same components are denoted by the same reference numerals, and duplicated explanations may be omitted.

[0014] In this specification, deviations in the directions of orthogonality, up and down, etc., are permitted to the extent that they do not impair the functions and effects of the embodiments. The shape of the corners is not limited to right angles, and may be rounded in an arch shape. Orthogonal and up and down may include approximately orthogonal and approximately up and down.

[0015] In addition, shapes such as circle, ellipse, rectangle, rectangular, trapezoid, hexagon, octagon, polygon, rectangular parallelepiped, prismatic, cylindrical, cylinder, and tubular may include approximately circle, approximately ellipse, approximately rectangular, approximately rectangular, approximately trapezoid, approximately hexagon, approximately octagon, approximately polygon, approximately rectangular parallelepiped, approximately prismatic, approximately cylindrical, approximately cylindrical, and approximately tubular.

[0016] The present invention relates to a method for manufacturing a pouch container having a mouth, a pouch container, a pouch container with a cap, and a double container with a discharge mechanism including a pouch container. The contents stored in the pouch container of the present invention are not limited, but are suitable for use as the pouch container. Examples of such contents include cosmetics containing vitamins (vitamins A, C, etc.) and their derivatives, as well as medicines and foods that are easily deteriorated by oxidation.

[0017] FIG. 1 is an external view showing a pouch container according to a first configuration example of the present invention.

[0018] The pouch container 1 has a pouch bag 10 and a mouth portion 20 .

[0019] The pouch 10 is composed of two side films 12, 13 and one top film 11 (see Figs. 1 and 5).

[0020] The mouth portion (also called a mouth member or spout) 20 has a flat, disk-shaped flange 21 and a cylindrical upright portion 22, and a helical protrusion (screw protrusion) 23 (see Figure 5) is formed on the outer periphery of the upright portion 22.

[0021] The mouth portion 20 is attached to the upper film 11 by melt bonding the resins together without using an adhesive. As a manufacturing method for this pouch container 1, the following first to fourth manufacturing methods will be described.

[0022] <First manufacturing method> A first manufacturing method for the pouch container 1 according to the first configuration example of the present invention will be described with reference to Figs.

[0023] FIG. 2 is a diagram showing a flow of a first manufacturing method for the pouch container 1 according to the first configuration example of the present invention.

[0024] First, in step S11, the film material F11 of the top film 11 and the film materials F12, F13 of the side films 12, 13 are formed. Alternatively, the film materials may be ordered from outside in advance. Here, the top film 11 has a thermoplastic outer resin layer 111 (121, 131) on the surface, a metal layer 112 (122, 132) inside, and a thermoplastic inner resin layer 113 (123, 133) as the innermost layer.

[0025] Then, in step S12, an end of the top film material F11 and ends of the side film materials F12, F13 are fused together, and the film materials are then cut along the film shape to form a bag with one end open.

[0026] Meanwhile, in parallel with steps S11 and S12, a resin spout 20 is molded in step S13. Alternatively, the spout member may be pre-ordered from outside.

[0027] Next, in step S14, the underside 211 of the thermoplastic resin flange portion 21 of the mouth portion 20 is attached (fused) to the thermoplastic resin layer 111 on the surface of the top film 11, which will become the upper surface of the pouch bag, by integrating the resin together using any one of ultrasonic, heat, or high-frequency welding methods.

[0028] In step S15, the contents (not shown) are filled into the pouch from the open end.

[0029] In step S16, one ends (lower ends) of the pouch bags are fused together to seal the inside of the pouch.

[0030] Each of these steps is described in detail below.

[0031] (First configuration example) FIG. 3 is a diagram showing the pouch container 1 according to the first configuration example of the present invention, exploded into two side surfaces, a top surface, and a mouth portion.

[0032] In this configuration example, the top film 11, which is the first film, is hexagonal.

[0033] The two side films 12 (13), which are the second films, each have a shape that combines a rectangle 12R and a trapezoid 12T, with the short side that is the upper side of the rectangle 12R (13R) and the lower base portion of the trapezoid 12T (13T) being formed continuously.

[0034] FIG. 4 is an explanatory diagram of an example of a step (step S12) of overlapping and welding films to form a pouch in the first manufacturing method.

[0035] The pouch-forming step S11 in FIG. 2, in which films 11, 12, and 13 are joined together to form a bag, will be described with reference to FIG. 3 and FIG.

[0036] As shown in Fig. 4, a strip-shaped top film material F11 that will become the top film is supplied from the side and is transported while being folded in half by a half-folded plate FT. In addition, a strip-shaped side film material F12 that will become the side film 12 is supplied from above, and a strip-shaped side film material F13 that will become the side film 13 is supplied from below. As a result, after merging, the top film material F11 folded in half is transported while being sandwiched from above and below by the side film materials F12 and F13.

[0037] Then, by using the sealing bar pair H1, which is a heating member, the ends of the top film material F11 and the side film material F12, and the top film material F11 and the side film material F13 (sealed portion E12 and sealed portion E21, and sealed portion E13 and sealed portion E31 in FIG. 3) are welded together. Note that while the sealing bar pair H1 is shown in FIG. 4 as being rectangular, the heated portion of the sealing bar pair H1 is trapezoidal in shape, following the end of the shape of the film after cutting (sealed portion E).

[0038] In addition, in the above-mentioned fusion process and the below-described welding process of the mouth portion 20, the heating member is subjected to a surface treatment such as Teflon (registered trademark) so that the inner or outer resin layer of the film is not adhered to the heating member.

[0039] Thereafter, the side ends of the side film material F12 and the side film material F13 (sealed portions E22 and E32, and sealed portions E23 and E33 in FIG. 3) are welded together using a pair of seal bars H2, which are heating members. As shown in FIG. 4, by continuously forming a film mold on the strip-shaped film material, the downstream side end of the mold for the upstream side films 12, 13 and the upstream side end of the mold for the downstream side films 12, 13 can be welded together by heating the seal bar H2 once.

[0040] After the edges are welded, the film material is cut along the film pattern by cutting means C to produce a film bag with only one edge open. For example, a Thomson blade corresponding to the shape of the side film 12 is provided on the underside of the cutting means C, and the bags are cut out one by one by the pattern-shaped Thomson blade. This completes step S12.

[0041] In addition, in Figures 3 and 4, the process of cutting the film material before cutting into individual pieces is shown after the welding process of the film ends is completed, but welding of the film ends may also be performed after the film is cut.

[0042] Thereafter, the mouth 20 is attached and the contents are filled, and then in step S16, the lower end E24 of one side film 12 and the lower end E34 of the rectangle of the other side film 13 are fused together to close the open end, closing the pouch bag and sealing the inside.

[0043] Because of this bag-like configuration, the mouth portion 20 does not come into contact with the contents, so that the contents are all surrounded by the pouch material when the product is manufactured.

[0044] Here, the material of the pouch membrane constituting the side films 12, 13 and the top film 11 will be described.

[0045] The top film 11 and the side films 12, 13 each include an air barrier layer capable of blocking air.

[0046] Specifically, the top film 11 to which the mouth member 20 is attached is constructed with a three or more layer structure having resin layers 113, 111 on the inner and outer surfaces to sandwich an air barrier layer 112. The inner resin layer 113 is used for welding the ends, and the outer resin layer 111 is used for welding the mouth member 20 (see Figs. 6 to 8).

[0047] The side films 12, 13 are constructed with a two or more layer structure having at least an air barrier layer 122, 132 and a resin layer 123, 133 on the inner surface side for welding the ends. The side films 12, 13 may also have a resin layer 121, 131 on the outer surface side outside the air barrier layer 122, 132.

[0048] An example of the air barrier layer is a metal layer. The metal of the metal layer is preferably any one of aluminum, iron, gold, silver, titanium, tin, zinc, platinum, ruthenium, palladium, iridium, etc., alloy (tinplate), or metal oxide (aluminum oxide (alumina), etc.). "Including a metal layer" may be entirely made of a metal material, or may include forming a metal film by evaporating a metal onto the surface or one side of the interior of another material (e.g., resin, etc.). The metal of the metal layer is preferably an aluminum layer. The metal layer is an air barrier material and a light barrier material.

[0049] Alternatively, the air barrier layer may be an inorganic layer. The inorganic layer is, for example, a layer containing an inorganic substance such as silica (silicon dioxide). The inorganic layer may be colored to have light blocking properties, or may be transparent to not have light blocking properties.

[0050] Such an inorganic layer may be an inorganic vapor deposition layer formed by vapor depositing an inorganic material on a plastic sheet. By forming an inorganic vapor deposition layer, the flexibility of the film can be improved. The vapor deposited inorganic material is, for example, silica.

[0051] On the other hand, the resin of the resin layer that constitutes the inner and outer surfaces is composed of, for example, an olefin-based resin. Olefin-based resin is a general term for chain-like hydrocarbons with one double bond, and is a thermoplastic resin whose physical properties change depending on the degree of crystallinity because it is made of crystalline polymers. Examples of olefin-based resins include polypropylene (PP), low-density polyethylene (LDPE), ethylene-vinyl acetate copolymer (EVA), polymethylpentene (TPX), and ultra-high molecular weight polyethylene. Olefin-based resins are chemically stable and resistant to acids and alkalis.

[0052] Alternatively, the outermost resin layer of the upper film may be made of an ester-based resin, which is a thermoplastic resin. An example of an ester-based resin is polyethylene terephthalate (PET). Ester-based resins exhibit excellent corrosion resistance against acids.

[0053] Furthermore, when the mouth portion 20 is attached to the upper film, the underside of the flange portion 21 of the mouth portion 20 is also made of a resin layer, so that the resin is attached as a single unit, and therefore the underside of the flange portion 21 of the mouth portion 20 is also made of the above-mentioned olefin-based resin or ester-based resin.

[0054] The mouth portion 20 needs to be strong enough to withstand screwing with the cap 30 described below and the spiral tube 65 of the pump heads F and G, and is therefore made from a resin such as a plastic such as polyethylene (PE), polypropylene (PP), polybutyl terephthalate (PBT), polyethylene terephthalate (PET), etc. (see Figures 44 to 47).

[0055] In the first configuration example, when the container is manufactured by the first manufacturing method or the third manufacturing method, the lower surface of the flange of the mouth portion 20 is made of an olefin-based resin or an ester-based resin.

[0056] In this case, it is preferable that the resin layer constituting the lower surface of the flange portion 21 of the mouth portion 20 and the resin layer constituting the outer surface of the upper film are made of resins having similar or the same melting temperature.

[0057] FIG. 5 is an overall explanatory view showing how the mouth portion 20 is attached to the upper film 11 in the first manufacturing method.

[0058] In the first manufacturing method, as shown in FIG. 2, after the top film and the side films are configured into a bag shape in step S12, the mouth portion 20 is welded to the top film 11 in step S14.

[0059] Therefore, in order to ensure that mouth portion 20 is successfully welded to the outside of top film 11, in step S14, a bag made of connected top film 11 and side films 12, 13 is placed over a cylindrical receiving base (jig) 9, top film 11 is set in a stretched state, and mouth portion 20 is welded from above (see Figures 5 and 6).

[0060] A specific welding method in step S14 will be described with reference to the following FIGS.

[0061] (Ultrasonic welding) FIG. 6 is an explanatory diagram showing how the mouth portion 20 is welded to the upper film 11 by ultrasonic waves in the first manufacturing method.

[0062] As described above, the top film 11 and the side films 12, 13 are composed of a three or more layer structure having an outer surface which is the surface, and an outer resin layer 111 and an inner resin layer 113 which are resin layers on the inner surface, sandwiching the metal layer 112.

[0063] Ultrasonic welding is a processing technology that uses minute ultrasonic vibrations and pressure to instantly melt and join thermoplastic resin.

[0064] The structure of the device that performs ultrasonic welding is such that horns V1 and V2, which act as resonators, are attached to an ultrasonic transducer. By concentrating ultrasonic vibrations at the tips of the horns V1 and V2, a strong impact is applied to the flange 21 of the mouth part 20, which is the workpiece to be welded.

[0065] In detail, (1) when vibration energy is generated by the ultrasonic vibrator, it is transmitted to the flange 21 of the mouth portion 20, which is a part, through the horns V1 and V2.

[0066] (2) The heat generation on the surface of the parts due to the vibration impact from the horns V1 and V2 is very small, and most of the impact is transmitted to the boundary surface between the flange portion 21 and the upper film 11, which are the parts to be welded.

[0067] (3) The transmitted vibration energy generates strong frictional heat at the boundary surface, instantly raising the temperature to the melting point of the resin, causing it to be welded.

[0068] Ultrasonic welding performed in this manner has the advantages of requiring a short amount of time for welding, being easy to automate, providing high airtightness, low power consumption, high reproducibility, being easy to control, and not producing unpleasant odors.

[0069] 6, the horns V1 and V2 are funnel-shaped, but the horns may have other shapes. For example, the horns may have a rectangular parallelepiped shape or a cylindrical shape surrounding the upright portion 22 of the mouth 20.

[0070] (Heat welding) FIG. 7 is an explanatory diagram showing how the mouth portion is welded to the upper film by heat from a heating element in the first manufacturing method.

[0071] The pouch bag 10 is supported by a cylindrical receiving stand (jig) 9A, and above the flange portion 21 of the mouth portion 20, a cylindrical heating portion H5 is provided.

[0072] The cylindrical heating part H5 applies heat from above the flange 21, whereby the surface resin layer 111 of the upper film 11 and the resin on the lower surface 211 of the flange 21 of the mouth part 20 are melted and welded together.

[0073] As other heat-based welding methods, for example, hot air, hot plate, impulse, iron, laser, or other heat welding methods may be used to attach the mouth portion 20 to the upper film 11.

[0074] (High frequency welding) FIG. 8 is an explanatory diagram showing how the mouth portion 20 is welded to the upper film 11 by high frequency in the first manufacturing method.

[0075] High-frequency welding is a technology in which a thermoplastic resin is subjected to a strong high-frequency electric field, a type of radio wave, which causes collisions, vibrations, and friction at the molecular level inside the material, resulting in self-heating and fusing and welding the resin (especially film).

[0076] More specifically, a high-frequency welding device is provided with a positive electrode and a negative electrode, which are high-frequency molds, sandwiching the resin to be welded. For example, the positive electrode 91 is provided above the flange 21 of the mouth 20, and the negative electrode 92 is provided inside the upper electrode base 9B. The electrodes 91 and 92 are cylindrical in shape so as to cover the flange 21 from above and below.

[0077] In this way, an electric field of high-frequency energy from the two electrodes 91, 92, at several tens of kHz, is applied to the resin sandwiched between the electrodes 91, 92, causing potential movement at the atomic and molecular level, causing the flange portion 21 of the mouth portion 20, which is made of resin, and the surface resin layer 111 of the top film 11 to generate heat from the inside, and the parts to be melted are selectively heated and welded.

[0078] In this type of high frequency welding, only the areas to be welded are heated, so welding can be completed in a short time, there is no thermal effect on areas not to be welded, and the welded surface can be beautifully finished.

[0079] Furthermore, in any of the welding methods shown in Figs. 6 to 8, no adhesive, which is a consumable material, is used, so the cost is low and a beautiful finish can be achieved.

[0080] Furthermore, if the flange 21 of the mouth 20 and the surface resin layer 111 of the top film 11 are welded to each other using the same material, a high level of welding strength close to the strength of the base material can be achieved. Therefore, the mouth 20 of the pouch container 1 attached by such a welding method can be prevented from coming off even when used in hot and humid conditions such as a bathroom or washroom (see FIG. 1).

[0081] (filling) FIG. 9 is an explanatory diagram showing a state in which the contents are being filled into the pouch from the rear end.

[0082] As shown in FIG. 9, the filling of the contents in step S15 is carried out from the bottom, which is the open end of the pouch bag 10, that is, from the side of the lower ends E24, E34 of the side films 12, 13.

[0083] However, as another filling example, in the stage of forming a pouch bag in step S12, a portion of the side of side films 12, 13 may be left open without being fused, and in step S15, the contents may be filled through the opening of the side of side films 12, 13 with the side facing up.

[0084] (End blockage) Figure 10 is a diagram illustrating the closing of the rear end. In Figure 10, the closing using heat and pressure is illustrated.

[0085] As described above, the side film has a three-layer structure, so that by sandwiching it between a pair of heat sealing plates (sealing bars) H6 and heating it, as shown in Figure 10, the lower ends E24, E34 of the side films 12, 13 are heat-sealed, and the pouch bag 10 is closed.

[0086] After filling as shown in FIG. 9, oxidation of the contents after filling can be prevented by closing the bottom end in an environment of an inert gas such as argon or nitrogen that is shielded from light.

[0087] (bottom tucked in) In the above flow of FIG. 2, the manufacturing flow ends with closing the pouch bag in step S16, but a step of folding the bottom end of the pouch bag may be further included after step S16.

[0088] Figures 11 to 13 are diagrams for explaining folding in the rear end. Of these, Figure 11 is a diagram showing the pouch bag 10 turned upside down before folding in the bottom end, Figure 12 is a diagram showing the state in which the center of the bottom end of the pouch bag 10 is pressed for folding, and Figure 13 is a diagram showing the state after the bottom end has been folded in.

[0089] By folding the bottom end welded part S of the pouch bag 10 in this manner, the pouch container 1 can be made more compact without changing the filling amount. Also, the position of the pouch container 1 can be stabilized with the mouth part 20 facing up as shown in Fig. 1. Furthermore, as described below, in a configuration in which the pouch container 1 is housed in the outer container 50 as the inner container of the double container 5 (see Figs. 44 and 45), the pouch container 1 is suitable for fitting snugly into the outer container 50.

[0090] In addition, since the folded portion will not affect the contents even if it peels off, the end portion after folding may be glued with adhesive.

[0091] <Second manufacturing method> 14 is a flow chart of a second manufacturing method for the pouch container 1 according to the first configuration example of the present invention. Only the differences from the first manufacturing method will be explained.

[0092] In this manufacturing method, the mouth 20 is not formed in advance, but after the top film 11 and the side films 12, 13 are formed into a pouch bag, the mouth is formed by insert molding onto the top side of the top film 11.

[0093] FIG. 15 is an explanatory diagram showing how mouth portion 20α is attached to upper film 11 by insert molding while being integrally formed in the second manufacturing method.

[0094] Insert molding is a molding method in which resin is injected around a metal part inserted into a mold to integrate the metal and resin. In detail, in insert molding, an insert is attached to a cavity (concave) CT while the mold is open, and then the mold is closed to perform injection molding.

[0095] 15, with top film 11α of the pouch bag set in jig 94 in contact with mold MP1, resin is injected into cavity CT of mold MP1 in which holes are formed, and mouth portion 20α is molded with mold pin MP2 inserted. As a result, mouth portion 20α including flange portion 21 and standing portion 22 is insert molded with resin so that the underside of flange portion 21 of mouth portion 20α is in close contact with resin layer 111 on the surface of top film 11α of the pouch bag.

[0096] This manufacturing method also does not use adhesives, which are consumable materials, so costs are low and the finish is beautiful.

[0097] Furthermore, because the mouth 20α is integrally formed on the resin layer 111 on the surface of the upper film 11α, which is made of the same material, the mouth 20α and the film 11α are in close contact with each other at a level close to the strength of the base material. Therefore, the mouth of a pouch container in which the mouth 20α is integrally formed by insert molding in this manner is very unlikely to come off even when used in hot and humid conditions such as a bathroom or washroom.

[0098] Furthermore, since the resin mouth portion 20α can be formed and attached to the upper film at the same time, the welding process in the manufacturing flow can be eliminated and there is no need to provide space for welding. Instead, a mold is required to form the resin mouth portion 20α at the same time as attaching it, so it is preferable to select an appropriate manufacturing method depending on the space available in the manufacturing equipment.

[0099] <Third manufacturing method> 16 is a flow chart of a third manufacturing method for the pouch container 1 according to the first configuration example of the present invention. This manufacturing method differs from the first manufacturing method in that the mouth portion 20 is welded to the upper film 11 in step S33 before forming the pouch into a bag shape (step S34).

[0100] Figures 17 to 19 are explanatory diagrams showing welding of the mouth portion 20 to the upper film in the third manufacturing method. Of these, Figure 17 is a diagram showing the state in which the mouth portion is welded to the upper film material, Figure 18 is a diagram showing the state in which the end of the upper film to which the mouth portion is attached is fused to the end of the side film, and Figure 19 is a diagram showing the state in which the end of the lower side film and the end of the upper film are heat sealed.

[0101] As shown in Fig. 17, first, the mouth portion 20 is welded from below to the top film material F11. Details of the welding process are shown in Fig. 20. Then, the film material F11 with the mouth portion 20 attached is cut into a hexagonal shape by cutting means C1. For example, a Thomson blade corresponding to the shape of the top film 11 is provided on the underside of the cutting means C1, and the film material F11 is cut by the hexagonal Thomson blade to produce the top film 11 with the mouth portion 20 attached.

[0102] Then, the end portion of the top film 11 to which the mouth portion 20 is attached is fused to the ends of the side films 12, 13. In detail, as shown in Fig. 18, the top surfaces of the side films 12, 13 whose ends have been fused are opened, and the upper side film 12 is folded back by inserting a clamping plate FB.

[0103] 19, while holding down the top film 11 from above with receiving stands (jigs) 901, 902 shaped like a hexagon excluding the mouth 20, a heating member H3 shaped like a trapezoid excluding the bottom side is placed under the jig 902 to heat seal the end of the lower side film 13 and the end of the top film 11. Then, the side film 12 is flipped over so that it is on the bottom, and the lower side film 12 and the top film 11 are heat sealed in the same manner.

[0104] FIG. 20 is an explanatory diagram showing how the mouth portion is welded to the upper film by thermal welding in the third manufacturing method.

[0105] In the welding by the third manufacturing method, the mouth portion 20 side is fixed as shown in Fig. 20. More specifically, the mouth portion 20 is fixed by the upper end of a cylindrical receiving jig 95 formed so as to surround the outer circumferential surface of the rising portion 22 of the mouth portion 20 and the upper surface of the flange portion 21.

[0106] A plate-, rod-, or roller-shaped heating part H6 is provided on the side (above) of the inner resin layer 113 of the film material F11.

[0107] With the film material F11 resting on the flange portion 21 of the mouth portion 20 fixed by the lower receiving jig 95, the heating part H6 presses the film material F11 from above, or moves while pressing against the upper surface of the film material F11, thereby heating the film material F11, so that the resin of the surface resin layer 111 of the film material F11 and the resin of the lower surface 211 of the flange portion 21 of the mouth portion 20 melt and bond together.

[0108] Alternatively, the upper heating part H6 may also be cylindrical in shape so as to correspond to the part where the flange part 21 of the mouth part 20 is formed. In that case, the upper heating part is composed of one part, and by applying pressure from above and heating, the surface resin layer 111 of the film material F11 and the resin on the lower surface 211 of the flange part 21 of the mouth part 20 are welded together.

[0109] 17 to 20, the top film is not yet in a bag shape when the mouth portion 20 is welded. Therefore, instead of using a cylindrical jig 9 conforming to the shape of the bag as shown in Fig. 4 and Fig. 5, the mouth portion 20 can be welded to the top film on a flat receiving platform or in a film state in which the film is unwound from a roll and under tension.

[0110] In addition, Figures 17 to 20 show an example in which the top film is formed by welding the mouth portion 20 to a continuous film and then cutting the top film material F11 to a specified shape and size, but it is also possible to attach the mouth portion 20 after cutting the top film material F11 into a hexagonal shape.

[0111] Although not shown in the figures, when welding by heat or high frequency is performed, the mouth portion 20 may be welded by sandwiching it from above and below against a tensioned upper film as shown in Fig. 20. Alternatively, the mouth portion may be welded from above on a flat receiving stand.

[0112] In this embodiment, the mouth is attached before the film is made into a bag shape, so there is more freedom when heating from the film side. However, in this embodiment, in the subsequent process of making the film into a pouch bag shape, simultaneous welding of the three edges using the general welding method shown in Figure 4 cannot be performed, and the welding of the top film and the two side films must be performed in two or more steps. Therefore, it is preferable to select an appropriate manufacturing method taking into account the manufacturing equipment, etc.

[0113] Furthermore, in this manufacturing method as well as in any other welding method, adhesives, which are consumable materials, are not used, so the cost is low and the finish can be beautiful.

[0114] Furthermore, if the flange 21 of the mouth 20 and the upper film material F11 are welded to each other, which are made of the same material, a high level of strength close to the strength of the base material can be achieved. Therefore, a pouch container with a mouth attached by such a welding method is very unlikely to have its mouth come off even if it is used in hot and humid conditions such as a bathroom or washroom.

[0115] <Fourth manufacturing method> 21 is a flow chart of a fourth manufacturing method for the pouch container 1 according to the first configuration example of the present invention. This manufacturing method differs from the second manufacturing method in that, in step S42, before forming into a bag shape (step S43), the mouth portion 20 is formed on the upper film 11 by in-mold molding.

[0116] FIG. 22 is an explanatory diagram showing how the mouth portion is attached to the upper film and formed integrally therewith by in-mold molding in the fourth manufacturing method.

[0117] In-mold molding is a technique in which a pre-printed film is sandwiched inside an injection molding die.

[0118] In-mold molding involves (1) feeding a film, (2) clamping and sucking the film, (3) injection molding, and (4) removing the film to form the mold. This results in a mouth member being integrally formed on the top film.

[0119] 22, with the top film 11β sandwiched between the dies MP1 and MP3, resin is injected into the cavity CT of the die MP1 in which a hole is formed, and the mouth portion 20β is formed with the die pin MP2 inserted. As a result, the mouth portion 20 including the flange portion 21 and the standing portion 22 is in-mold molded with resin so that the underside of the flange portion 21 of the mouth portion 20β is in close contact with the resin layer 111 on the surface of the top film 11β of the pouch bag.

[0120] Therefore, the mouth portion (spout, mouth portion member) 20 can be molded integrally with the upper film 11β in parallel with the film formation, without being molded separately as a single unit.

[0121] The position of the resin injection port (gate) that penetrates the inside of the mold MP1 from the outside and reaches the cavity CT, as shown in FIG. 22, is just an example, and the gate may be provided at another position.

[0122] This manufacturing method also does not use adhesives, which are consumable materials, so costs are low and the finish is beautiful.

[0123] Furthermore, because the mouth 20 is integrally formed on the resin layer 111 on the surface of the top film 11β, which is made of the same material, the mouth 20 and the top film 11β are in close contact with each other at a level close to the strength of the base material. Therefore, a pouch container with a mouth in which the mouth is integrally formed by in-mold molding in this manner can reduce the possibility of the mouth coming off even when used in a hot and humid environment.

[0124] Furthermore, since the formation of the resin mouth portion 20 and its attachment to the upper film 11β can be performed simultaneously, the welding step in the manufacturing flow can be eliminated, and there is no need to provide space for welding. Instead, a mold is required for forming the resin mouth portion 20 at the same time as attaching the resin mouth portion 20, so it is preferable to select an appropriate manufacturing method depending on the space available in the manufacturing equipment.

[0125] (Second configuration example) FIG. 23 is a view showing a pouch container 1A according to a second configuration example of the present invention, exploded into two side surfaces, a top surface, and a mouth portion.

[0126] In the above first configuration example, an example was shown in which the upper surface (and lower surface) was hexagonal, but the upper surface may be circular or elliptical as shown in FIG.

[0127] In this case, upper end portions 12S, 13S of side films 12A, 13A, which are the second film and are fused to the edge portion of top film 11A, which is the first film, have a shape of half a semicircle or an ellipse.

[0128] (Third configuration example) FIG. 24 is an exploded view of a pouch container 1B according to a third configuration example of the present invention, showing the side surface, top surface, and mouth portion.

[0129] In the above first and second configuration examples, the side of the pouch bag is formed by two side films 12, 13, but the side film may be formed by a single strip-shaped film. In this configuration example, the top film 11B, which is the first film, is substantially circular.

[0130] In the process of making a pouch in this configuration, first, one end of the belt-shaped side film 14, which is the second film, is rolled and fused to the outer peripheral edge of the substantially circular top film 11B having a resin layer on its upper surface.

[0131] Thereafter, side ends E41, E42 of the rolled, band-like side film 14 that are perpendicular to the end where the top film is disposed are fused together to form a bag-like pouch.

[0132] (Fourth configuration example) Fig. 25 is an external view of a pouch-container 1C according to a fourth configuration example of the present invention. As shown in Fig. 25, the pouch-container 1C may have fold lines (folds) 125, 135 in side films 12C, 13C.

[0133] Therefore, in the pouch container 1C, the portions of the side films 12C, 13C other than the fold lines 125, 135 may be constructed to contain more plastic, such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), etc., for reinforcement purposes than the portions of the fold lines 125, 135.

[0134] In this configuration, when the pouch bag 10C shrinks, it shrinks along the fold lines 125 and 135.

[0135] (Fifth Configuration Example) FIG. 26 is an external view showing a pouch container 1D according to the fifth configuration example of the present invention.

[0136] In the above example, the pouch bag has a spout attached to the upper surface film that constitutes the upper surface of the hexagonal shape, but the shape of the pouch bag is not limited to the above configuration. For example, the pouch bag may be in the shape of a horizontal prism or a cylinder.

[0137] In this configuration example, the mouth portion 20D is attached to the top film 15, which has approximately the same shape as the side film 12 in the first configuration example. This configuration example has the same configuration as the configuration example, except for the position where the mouth portion 20D is attached.

[0138] In this configuration example, top film 15, which has a shape in which the top side of a rectangle and the bottom base of a trapezoid are continuously formed, functions as the first film, and bottom film 16, which has a shape in which the top side of a rectangle and the bottom base of a trapezoid are continuously formed, and hexagonal side film 17 function as the second film.

[0139] In this configuration example, the process of making a pouch bag in step S11 of Figure 2 includes a process of fusing the outer edges of three consecutive sides of the hexagonal side film 17 to the three ends of the trapezoid of the top film 15, a process of fusing the rectangular side edges of the top film 15 to the ends which are the rectangular side edges of the bottom film 16, and a process of fusing the outer edges of the other three sides of the side film 17 to the three ends of the trapezoid of the bottom film 16.

[0140] 26, mouth portion 20D is welded to the center of the pouch, i.e., approximately the center in the longitudinal direction of top film 15. When the first manufacturing method is applied to this configuration, the difference is that in step S14, in the process of welding mouth portion 20D, the shape of the jig that fixes the bag-shaped film is not an upright cylinder but a horizontal cylinder or prism so that top film 15, which is the mounting surface, comes into contact with the underside of flange portion 21D. The other manufacturing process steps are almost the same.

[0141] (Other manufacturing process examples) In the above example, the rear end of the pouch container is opened to inject the liquid, but another portion may be used as the injection portion.

[0142] For example, in step S11 of the flow in Fig. 2, one end (side end) of the side film may not be bonded, and the side end may be used as an injection port for injecting the contents. In this case, the side end that is not used for injection and the bottom end are heat-sealed in advance in step S11 to form a bag shape composed of the top surface and the side surface.

[0143] (Modification) Furthermore, in the above first to fifth configuration examples, the lower ends of the side films in the pouch bag 10 are fused together as the lower end fusion section S (without a gusset) as shown in Figures 11 to 13, but the pouch container according to the present invention may be a gusset pouch (not shown) having a lower surface (lower gusset portion). When a lower surface is provided, the shape of the lower surface film is the same as that of the upper surface film.

[0144] Furthermore, by providing the gusset portion, the pouch bag can be maintained in an upright state with the mouth portion facing up, even without folding back the bottom end as shown in Figs.

[0145] Alternatively, for example, in the first configuration example or the second configuration example, a side film may be provided between the two side films, and an additional side gusset may be provided to increase the depth of the side surface.

[0146] (Sixth configuration example: 4-sided seal) In the above configuration example, the first film and the second film are stretched in different directions, but in the pouch bag of the present invention, the first film and the second film may be arranged to face each other.

[0147] Fig. 27 is an explanatory diagram (outer perspective view) of a pouch container 1E according to a sixth configuration example, and Fig. 28 is a cross-sectional view of the X section of Fig. 27.

[0148] In this configuration example, the first film is upper film 15, and the second film is lower film 16. Four sides (E51 to E54) of upper film 15 and four sides (not shown) of lower film 16 are welded by heat sealing.

[0149] In this configuration example, since the upper film 15 and the lower film 16 are welded facing each other, it is preferable to weld the mouth portion 20E in the film state before welding the upper film 15 and the lower film 16 to form a bag, as in the flow of Fig. 14. Alternatively, it is preferable to insert-molde or in-mold-molde the mouth portion in the film state, as shown in Figs. 21 and 22.

[0150] In Figures 27 and 28, an example of a pouch container consisting of two films, an upper and lower, is described as being rectangular, but the shapes of the two films, upper and lower, may be other quadrilateral shapes (e.g., trapezoid, diamond, etc.), circles, ellipses, or other polygonal shapes.

[0151] In either case, before filling, one side (or part of the arc) is left unfilled, and the other sides (for example, three sides (E51, E52, E54) in FIG. 27) are heat-sealed, and after filling, the remaining side (E53) is heat-sealed.

[0152] In this example, the upper film and the lower film are arranged facing each other vertically, so that the pouch container can maintain an upright state even without folds or other support members.

[0153] Although it is shown in a simplified manner in Fig. 28, in this configuration as well, the upper film and the lower film include at least an air barrier layer containing a metal or inorganic substance, and an outer resin layer and an inner resin layer that sandwich the air barrier layer, as shown in Fig. 20. This makes it possible to prevent oxidation of the contents (not shown) after filling.

[0154] (7th composition example: Pouch bag made of one sheet (sealed on three sides)) In the above first to sixth configuration examples, examples in which a pouch bag is formed using a plurality of films have been described, but a pouch bag may also be formed by folding a single film.

[0155] Fig. 29 is an external view showing a pouch container 1F according to a seventh configuration example of the present invention, and Fig. 30 is a cross-sectional view of cross section X in Fig. 29. Fig. 31 is a manufacturing explanatory diagram of the pouch container 1F according to the seventh configuration example of the present invention, and Fig. 32 is a diagram showing the state in Fig. 31 where the mouth portion has been welded at regular intervals to the sheet before cutting.

[0156] In this configuration example, the side film 17 to which the mouth portion 20F is welded is folded to become a rectangular bag-shaped film that constitutes the upper and lower surfaces.

[0157] In addition, Figure 29 shows an example in which the top surface of the side film 17 is rectangular, but as long as the sides are at the fold lines and the shape is symmetrical from top to bottom, it may be a trapezoid, hexagon, octagon, or other even-numbered polygon.

[0158] Here, an example of a manufacturing process for the pouch container 1F of the seventh configuration example is shown in Fig. 31 and Fig. 32. First, as shown in Fig. 31, the mouth portion 20F is welded at regular intervals to the sheet before cutting. The welding method is as shown in Fig. 20 above.

[0159] 32, the film material F17 is folded so that sides E71 and E72 overlap, and the overlapping sides E71 and E72 and side E73 continuous with the sides E71 and E72 are heat-sealed, and then the contents are filled. When filling the contents, an inert gas is injected while filling the contents, or an inert gas is injected immediately after filling the contents. This makes it possible to prevent the contents from being caught in the sealed portion during heat sealing for hermetic sealing, and also makes it possible to prevent air from flowing into the pouch container when filling the contents.

[0160] Then, the remaining side E74, which is the filling port, is heat-sealed. At this time, the side E74 at the downstream end of the upstream pouch container bag and the side E73 at the upstream end of the downstream pouch bag are heat-sealed simultaneously. Then, after the three sides are heat-sealed, each pouch bag is cut in the center of the heat-sealed area along the side E74 shown by the dotted line in Figure 32.

[0161] This allows the manufacturing process to be made more efficient, as the process of folding, heat sealing to make a pouch, filling, sealing, and cutting can all be done in a single process.

[0162] Although it is shown in a simplified manner in Fig. 30, in this configuration as well, one film includes at least an air barrier layer containing a metal or inorganic substance, and an outer resin layer and an inner resin layer that sandwich the air barrier layer, as shown in Fig. 20. This makes it possible to prevent oxidation of the contents (not shown) after filling.

[0163] (8th configuration example: pillow shape) Although Fig. 29 shows an example in which one sheet is heat-sealed at its side edge, a pillow shape in which a single sheet is heat-sealed at its back side may also be used. Fig. 33 is a top external view showing a pouch container 1G according to an eighth configuration example of the present invention, and Fig. 34 is a bottom external view showing the pouch container according to the eighth configuration example.

[0164] In that case, after the back side is heat sealed, the sheet is rotated and folded, one end is sealed and filled, and then filled.

[0165] In this configuration, as shown in Figures 33 and 34, by injecting an inert gas such as argon or nitrogen immediately after filling the container with the contents and then performing heat sealing, it is possible to prevent oxidation of the contents during filling and sealing of the bottom end.

[0166] <Application example 1: Combination with a cap> 35 is a diagram showing a pouch container 1H having a similar structure to the pouch container 1C according to the fourth embodiment of the present invention, combined with a cap 3 that is opened by rotation. As described above, the opening is provided with a helical protrusion, and therefore a cap that screws onto the opening may be provided.

[0167] The structure of the cap will be described with reference to Figures 36 and 37. Figure 36 is an exploded view of the vicinity of the cap in Figure 35. Figure 37 is a half cross-sectional explanatory view of the cap and the pouch container mouth. The pouch container 1H of the present invention combined with the cap 3 forms a capped container 4.

[0168] In a pouch container 1H according to an application example of the present invention, a spiral projection 23 is formed on the outer periphery of an upright portion 22 of a mouth portion 20H. In addition, a rotation stopper 24 is provided below the spiral projection 23 of the upright portion 22.

[0169] In detail, the cap 3 has a lower cap 31, an upper cap 32, an inner plug 33, and an O-ring 34. A stopper ring 39 is provided under the cap 3 before use.

[0170] The bottom cap 31 is configured with a side wall 311, a breakthrough plug 313, an annular connecting portion 314, and an upper end protrusion 315. The side wall 311 constitutes an outer tube of the breakthrough plug 313, with a spiral groove 312 formed on the inner peripheral surface. The breakthrough plug 313 is a cylindrical plug portion whose outer circumference is thinner than the inner circumference of the standing portion 22 of the pouch container 1H. The annular connecting portion 314 is an example of a connecting portion, and connects the upper end of the breakthrough plug 313 and the upper end of the side wall 311. The bottom cap 31 further has an upper end protrusion 315 that stands from the upper surface of the annular connecting portion 314.

[0171] The upper cap 32 has a top plate 321 and a two-stage side wall 322. The lower cap 31 and the upper cap 32 are engaged with each other with the upper end protrusion 315 of the lower cap 31 sandwiched between the inner surface of the two-stage side wall 322 and the inside plug 33.

[0172] As shown in FIG. 37, when the stopper ring 39 is attached under the cap, the breakthrough plug 313 does not reach the upper film 11, and the upper film 11 is not punctured.

[0173] Then, immediately before use, the stopper ring 39 is removed and the cap 3 is rotated relative to the standing portion 22, causing the breakthrough plug 313 to descend and perforate the central region of the top film 11. The central region refers to the region of the top film 11 that is exposed relative to the cap 3 and is located at the center inside the standing portion 22 after the mouth portion 20H is attached to the pouch bag 10H.

[0174] The internal behavior when the cap is rotated during use will be described with reference to Figures 38 to 42. Figures 38 and 39 are diagrams for explaining the procedure for opening the cap in Figure 35.

[0175] First, grasp the knob of the stopper ring 39 and tear it off in the direction of the arrow in Figure 38. The removed stopper ring 39 can be disposed of.

[0176] Turn the stopper in the direction of the arrow in Figure 39 to close it tightly. By tightening it tightly until the stopper at the end of the screw can no longer be seen, the top film 11 will be perforated, allowing the contents to come out.

[0177] Figures 40 to 42 are explanatory diagrams of the rotation performed in Figure 39. Of these, Figure 40 is an enlarged view of the lower end of breakthrough plug 313, Figure 41 is a view from above of the state in which top film 11 has been cut when breakthrough plug 313 has descended to the dotted line in Figure 40, and Figure 42 is a view of top film 11 from the mouth portion 20H side in Figure 39 with the cap removed.

[0178] 40, breakthrough plug 313 has an oblique cylindrical shape with an inclined lower end. The area that comes into contact with top film 11 during puncturing is designated as inclined lower end 313L.

[0179] Before rotation, the top film 11 and the breakthrough plug 313 of the cap 3 are not in contact with each other (see FIGS. 35 and 37).

[0180] When the cap 3 is rotated, the breakthrough plug 313 descends and the lower end of the inclined lower end portion 313L comes into contact with the upper film 11 as shown by the solid line in FIG. 40, and then the upper film 11 begins to penetrate vertically.

[0181] As the rotation of the cap 3 continues, the breakthrough plug 313 descends, cutting out an arc-shaped portion of the top film 11. At this time, only the inclined lower end 313L of the breakthrough plug 313 is in contact with the top film 11 and is able to break through the top film 11 little by little.

[0182] As shown by the dotted line in Figure 40 and as shown in Figure 42, even when cap 3 is rotated to the bottom end, the arc-shaped cutout portion is not cut over the entire 360° circumference, and part of it remains connected.

[0183] The rotation angle for cutting off the top film is determined by the height of the anti-rotation stopper 24 that faces the stopper ring 39 that was engaged before use. The rotation angle of the cap 3 for puncturing, determined by the anti-rotation stopper 24, is preferably set to an angle at which the contents flow smoothly and at which some of the contents remain even when rotated to the maximum extent.

[0184] Since the cap 3 breaks through the top film 11 of the pouch container 1H just before use, the pouch container 1H can be kept sealed during the distribution process. In other words, air can be prevented from entering the pouch bag 10H, which is the pouch body, until just before use, so the properties of the contents are hardly changed until use.

[0185] <Application Example 2: Refillable containers> 43 is an explanatory diagram showing a state in which the pouch container of the present invention is used as a refill container. The pouch container 1I of the present invention can also be used as a refill container.

[0186] 43, when used for refilling, a piercing member like the inner plug of the cap described above is provided on the refilling aid 8, and by engaging with the refilling aid 8, the top film 11 at the back of the mouth 20I of the pouch container 1I (the portion of the mouth 20I closed by the top film 11 on the pouch bag 10I side) is pierced. Then, the contents contained in the pouch container 1I are transferred to the refilling bottle 6 via the refilling aid 8.

[0187] 43 shows an example in which a pouch container 1I similar to the pouch container 1C of the fourth configuration example in which the hardness of the bag portion is reinforced is used as a refill container, but since the refill container is discarded after refilling, there is no need to maintain the upright state thereafter. Therefore, the pouch containers 1, 1A, 1B, 1D, 1E, 1F, and 1G configurations in which the hardness is not reinforced can also be used as refill containers.

[0188] <Application example 3: Double container (double container with discharge mechanism)> Next, the double container having the pouch container of the present invention will be described with reference to Figs.

[0189] Fig. 44 is an exploded view of a double container 5 equipped with a pouch container 1J having a similar structure to the pouch container 1C according to the fourth configuration example of the present invention as an inner container. Fig. 44 shows a state in which the cap 30 is engaged with the pump head F.

[0190] Fig. 45 is a diagram showing an example in which a pump head F is attached to the mouth portion 20J of a pouch container 1J and an outer container 50 of the present invention. Fig. 46 is an exploded cross-sectional view of the pump head F.

[0191] The pump head F is a dish-shaped, upward-discharge type, airless discharge mechanism. The pump head F can discharge the contents upward using a pump while maintaining an airtight state.

[0192] In detail, the pump head F has a cylinder portion 60, a pump portion 70, and a cylindrical cover 80. The cylindrical cover 80 is a member that is placed over the cylinder portion 60 and attached to the outer container 50, and a cap 30 is engaged with the outside. The cylinder portion 60 is a member that fits into the mouth portion 20J of the pouch container 1J. The pump portion 70 is a member that, together with a part of the cylinder portion 60, realizes part of the discharge function of the airless characteristic. The pump head F will be described in detail with reference to FIG. 46.

[0193] The outer container 50 is a cylindrical container with a bottom in which the pouch container 1J is housed. The outer container 50 has a bottom surface 51 and a side wall 52. The upper end of the side wall 52 is recessed both on the outside and inside, and an outer peripheral screw protrusion 54 is provided on the outer peripheral surface of the upper end thin-walled portion 53 (see FIG. 45).

[0194] The inner recess of the upper thin portion 53 is a portion into which the lower peripheral wall 623 of the cylinder portion 60 fits (see FIGS. 45 and 46).

[0195] Furthermore, a cap 30 may be provided removably to cover the pump section 70 of the pump head F. When attaching the cap 30, the outer peripheral screw projections 86 provided on the cylindrical cover 80 are threadedly engaged with the inner surface of the side wall 37 of the cap 30 (see Figures 45 and 46).

[0196] In this configuration, immediately before use, the upright portion 22 of the mouth portion 20J is aligned with and fitted into the spiral tube 65 hanging down from the lower cylinder portion 60 of the pump head F, which is the discharge mechanism, and the cylinder portion 60 is rotated relative to the mouth portion 20J, causing the breakthrough tube 66 to pierce the upper film 11.

[0197] In this configuration, when the pump head F is an airless discharge mechanism, an airtight state is maintained for the mouth portion 20J, so that when the contents contained in the pouch bag 10J of the pouch container 1J become reduced, the pouch bag 10J shrinks, but the shape of the outer container 50 does not change.

[0198] In addition, in this configuration, by making part or all of the outer container 50 transparent, it becomes possible to check from the outside how the pouch bag 10 shrinks in accordance with the remaining amount of content while maintaining the sealed state, and the remaining amount of content can be confirmed at a glance.

[0199] In Figure 44, an example of the outer shape of the outer container 50 is shown as being cylindrical, but as long as the outer container 50 is capable of accommodating the pouch container 1J and can fit into the cylinder portion 60, the shape of the side wall 52 other than the upper end may be any shape, such as a square tube, a cone, a gourd, an egg, etc.

[0200] In the double container 5 shown in Figures 44 and 45, the pouch container having a pouch bag and a mouth is detachably attached to the outer container 50. As a result, when the pouch bag 10J of the pouch container 1J becomes empty or the contents in the pouch bag 10J become low, the pouch container 1J can be replaced with a new pouch container filled with the contents. Then, the outer container 50, the pump head F, and the cap 30 can continue to be used.

[0201] 44 shows an example in which a pouch container 1J similar to the pouch container 1C of the fourth configuration example in which the hardness of the bag portion is reinforced is used as the inner container, but in the double container 5, since the outer container 50 exists outside the inner container, the inner container does not need to maintain an upright state. Therefore, the configurations of pouch containers 1, 1A, 1B, 1D, 1E, 1F, and 1G in which the hardness is not reinforced can also be used as the inner container of the double container.

[0202] (Pump head configuration) Next, the configuration of the pump head F will be described with reference to Fig. 46. As shown in Fig. 46, the pump head F includes a cylinder portion 60, a pump portion 70, and a cylindrical cover 80.

[0203] The cylinder portion 60 is a case portion that supports the pump portion 70 at its upper side, and a fitting portion that fits with the mouth portion 20J (see FIG. 45) of the pouch container 1J at its lower side. In detail, the cylinder portion 60 has a bottom wall 61, a peripheral wall 62, a cylinder tube 63, a middle tube 64, a spiral tube 65, and a breakthrough tube 66.

[0204] In the cylinder section 60, the upper side of the bottom wall 61 is a case section that supports the pump section 70, and the case section has a triple-cylinder structure in which, from the outside, a peripheral wall 62, an intermediate tube 64, and a cylinder tube 63 rise upwardly concentrically from an upper surface 611 of the bottom wall 61.

[0205] Moreover, inside the cylinder 63, an annular connecting portion 67 is provided as the bottom surface of the cylinder 63, connecting the upper end of the spiral cylinder 65 and the upper end of the breakthrough cylinder 66. Moreover, the annular connecting portion 67 is formed with a suction hole 68 that opens continuously from the inner peripheral surface of the breakthrough cylinder 66.

[0206] An outwardly rising flange 621 is provided on the outer surface of the peripheral wall 62, with the upper side of the flange 621 forming the upper peripheral wall 622 and the lower side forming the lower peripheral wall 623. When the pump head F is assembled, the upper peripheral wall 622 of the cylinder portion 60 is fitted into an annular groove between the upper peripheral wall 82 and the hanging wall 84 of the cylindrical cover 80. Then, when the pump head F is attached to the outer container 50 in an assembled state, the lower peripheral wall 623 is located inside the upper end thin-wall portion 53.

[0207] The lower side of the cylinder portion 60 has a double-cylinder structure in which, in descending order of size, a spiral cylinder 65 and a breakthrough cylinder 66 hang down concentrically from the lower surface 612 of the bottom wall 61. The spiral cylinder 65 has a female thread structure with a spiral groove 651 formed on the inner surface. The breakthrough cylinder 66 is an example of a breakthrough plug, with a slanted end 661 at its lower end.

[0208] When the pouch container 1J is attached to the cylinder part 60, the standing part 22 of the mouth part 20J enters into the annular recess between the spiral tube 65 and the breakthrough tube 66, and the spiral protrusion 23 on the outer surface of the standing part 22 screws into the spiral groove 651 of the spiral tube 65. Then, as the pouch container 1J rotates relative to the cylinder part 60 while the spiral tube 65 screws into the standing part 22, the inclined end 661 of the breakthrough tube 66 reaches the top film 11 of the pouch container 1J and perforates the top film 11.

[0209] In addition, after the pouch container 1J is attached to the cylinder portion 60 and the assembly of the double container is completed, during use, the breakthrough tube 66 becomes an intake tube whose inner hollow portion becomes a flow path for sucking up the contents inside the pouch bag 10J.

[0210] The pump section 70 has a lifting head 71 , a piston guide 72 , a piston retainer 73 , a piston 74 , a spring 75 , a lower valve body 76 , and a mouth valve body 77 .

[0211] When not pressed, the lower valve body 76 is separated from the other members and attached to the inside of the cylinder tube 63 of the cylinder portion 60 , above the annular connecting portion 67 and the suction hole 68 .

[0212] The pump section 70 is a member that, when pressed by a user, sucks up and discharges the contents while maintaining an airtight state. When the pressing top surface 711 of the lifting head 71 of the pump section 70 is pressed, the lifting head 71, piston guide 72, and mouth valve body 77 all descend together, the piston 74 descends less than the lifting head 71, the piston retainer 73 and lower valve body 76 do not change position, and the spring 75 contracts.

[0213] More specifically, the lift head 71 has a pressing top surface 711 and an outer wall 712. An opening 713 is formed in the center of the pressing top surface 711, which is the button portion, and a mouth valve body 77 is fitted into it. In addition, a lower end annular protrusion 714 is provided at the lower end of the outer wall 712. When the pump head F is in an assembled state and no pressure is being applied from above, the lower end annular protrusion 714 abuts against the lower end of the side wall (lower peripheral wall) 81 of the cylindrical cover 80, thereby defining the upper end position of the lift head 71.

[0214] The piston retainer 73 is a member that retains the piston 74 to prevent it from slipping out.

[0215] The piston guide 72 is a cylindrical member that guides the piston 74 and is arranged so as to come into contact with the lower end of the mouth valve body 77. A horizontal hole 721 that serves as an inlet hole is formed in part of the cylindrical surface.

[0216] The piston 74 is an example of a valve body, and can slide independently along the inner surface of the cylinder tube 63 of the cylinder portion 60 .

[0217] The lower valve body 76 is disposed on the inner lower surface of the cylinder tube 63 of the cylinder portion 60, and is a three-point valve or the like that opens only when the contents are aspirated.

[0218] The mouth valve body 77 is a valve body (check valve) that opens the hole only when the lift head 71 is pressed in.

[0219] The piston 74, the lower valve body 76, and the mouth valve body 77 are formed of an elastic material such as rubber, or a soft material such as an elastomer.

[0220] While the lifting head 71 is being pushed in (when discharging the contents), the piston 74 maintains its position for a while due to the resistance against the inner surface of the cylinder 63, and then slides downward when the lower end of the hanging cylinder around the opening 713 comes into contact with the rear end (upper end) of the piston 74. While the piston 74 maintains its position against the cylinder 63 due to the resistance, the piston guide 72 descends together with the lifting head 71.

[0221] As a result, the position of the horizontal hole 721 of the piston guide 72 becomes lower than the lower end of the inner surface of the piston 74, so that the horizontal hole 721 that was closed by the piston 74 opens, and the contents enter the hollow part of the piston guide 72. Then, the content that entered the piston guide 72 is discharged by the amount.

[0222] On the other hand, when the lift head 71 returns to its initial state (when the contents are being sucked), the piston 74 slides upward along the cylinder 63 together with the piston guide 72.

[0223] In this way, the pump head F of this configuration has three valve bodies that open at different times only when in use, resulting in an airless discharge mechanism that can maintain an airtight state. Also, since only the maximum amount of fluid discharged per push is the amount inside the piston guide 72, overdischarge can be prevented.

[0224] The material of the pump head F other than the valve body and spring may be any material that can withstand the discharge operation and the operation of the check valve, since the contents pass through the inside of the pump section 70 only during use.

[0225] As shown in Figures 45 and 46, cylindrical cover 80 is a cylindrical cover provided on the outermost side of pump head F. Cylindrical cover 80 has a lower peripheral wall 81 with a large diameter, an upper peripheral wall 82 with a smaller diameter than lower peripheral wall 81, an upper end ring 83 that extends inwardly in an annular shape from the upper end of upper peripheral wall 82, and a hanging wall 84 that hangs down downward from the inner circumferential edge of upper end ring 83.

[0226] The upper part of the cylindrical cover 80 has a double-cylinder structure formed by an upper peripheral wall 82 and a depending wall 84, and when the pump head F is assembled, the upper end of the upper peripheral wall 622 of the cylinder portion 60 is inserted into the annular groove between the upper peripheral wall 82 and the depending wall 84.

[0227] Furthermore, an inner peripheral surface of the lower peripheral wall 81 of the cylindrical cover 80 is provided with an inner peripheral screw projection 85 for engaging with the outer container 50. An outer peripheral surface of the upper peripheral wall 82 is provided with an outer peripheral screw projection 86 for engaging with the cap 30.

[0228] It is more preferable that the pump head F is made of a material having excellent air-blocking properties, such as plastic containing a metal layer or an inorganic layer, so that air does not enter the pouch bag 10 through the pump head F. This makes it possible to prevent the state of the contents from changing even after the top film 11 is punctured.

[0229] In this configuration, the pump head F, which is an airless discharge mechanism, is attached to the mouth portion 20J in the manufacturing process before shipping. Therefore, the contents inside the pouch 10 are kept from coming into contact with oxygen as much as possible, and are kept in a state where there is little denaturation due to oxidation until the time of discharge.

[0230] In this configuration, since it is assumed that the contents will remain on the pressing top surface 711, which is the flat dish-shaped discharge surface, it is preferable to store as the contents a highly viscous liquid (fluid) such as cosmetics (basic cosmetics, base makeup cosmetics, point makeup cosmetics), solid perfumes, seasonings, etc., which have a predetermined viscosity.

[0231] <Application Example 4: Installation of a discharge mechanism (pump head with tray)> Fig. 47 is an exploded view of a double container 5K equipped with a pump head with a tray and a pouch container 1K having a shape substantially the same as that of 1C according to the fourth configuration example of the present invention. Fig. 47 is an external view, and only the lower part of the cylinder mechanism 60K is shown in perspective. The cylinder mechanism 60K in this configuration example is a member that realizes the functions of the cylinder part 60 and the cylindrical cover 80 in Fig. 46 in a single member.

[0232] The pump head G with a tray shown in Fig. 47 is a modified version of the pump head shown in Fig. 45, and is equipped with a tray pump head G, the rise and fall of which can be visually observed from the outside, as a discharge mechanism with airless characteristics having a pump suction configuration. In other words, in the configuration of Fig. 47, the lower part of the pressing top surface 71K extends like a stem, compared to Fig. 45.

[0233] In this configuration, a cover 301 with a hinge 302 is attached to a part of the cylinder mechanism 60K of the pump G so as to be able to open and close, and the cover 301 can cover the upper part of the pressing top surface 71K which serves as a tray.

[0234] In this example, since the cylinder mechanism 60K is integrated with the lid 301, the cylinder mechanism 60K may have a structure in which the cylinder mechanism 60K covers the outer container 50K from the outside. In the example shown in Fig. 47, the outer container 50K does not have a thin upper end portion, and the inner peripheral protrusion 691 provided at the lower end of the side wall 69 of the cylinder mechanism 60K rides up and fits into the annular protrusion 56 formed on the outer periphery around the upper end of the side wall 52K, thereby allowing the cylinder mechanism 60K and the outer container 50K to engage with each other.

[0235] In addition, in this configuration, the pressing top surface 71K, which serves as a tray, is recessed, so that low-viscosity contents can remain on the pressing top surface 71K. For example, this configuration is suitable for use by soaking the dispensed contents into a sponge, puff, cotton, tissue, kitchen paper, etc.

[0236] In this configuration, a pump head G with a tray, which is an airless discharge mechanism, is attached to the mouth 20K of the pouch container 1K during the manufacturing process before shipping. This keeps the contents inside the pouch 10K from coming into contact with oxygen as much as possible, and keeps them in a state where there is little denaturation due to oxidation until the time of discharge.

[0237] The pump head G with tray shown in Fig. 47 is also provided with a check valve function similar to that of Fig. 46. Therefore, even if the container is opened, partially used, and then left for a while, air does not flow in, so the properties of the contents (contents) do not change much. Furthermore, in Fig. 47, even when the pump of the pump head G with tray is driven to perform the discharge operation, air can be prevented from flowing in to the pouch bag 10K. Therefore, the properties of the contents do not change much even when the container is used.

[0238] As shown in Figures 44 to 47, in the double containers 5, 5K of the above-mentioned multiple embodiments, the pouch container is formed of an airtight, non-light-transmitting material, and is therefore suitable for containing liquids that do not tolerate light transmission and contact with oxygen.

[0239] When the contained liquid is discharged for use, the pouch bag of the pouch container undergoes plastic deformation, and when the liquid in the pouch bag runs out, it shrinks and becomes thin and flat in the vertical direction, so that even if only a small amount remains, there is no need to remove the pouch container from the outer container and further compress it.

[0240] <Application Example 5: Installation of a dispensing mechanism (horizontal dispensing dispenser)> Fig. 48 shows an example in which an airless pump (dispenser) is attached as a discharge mechanism to the mouth of the double container of the present invention. Fig. 48 is an exploded perspective view of a double container 5L equipped with a dispenser D and equipped with a pouch container 1L having substantially the same shape as the pouch container 1 according to the first configuration example of the present invention as an inner container.

[0241] A dispenser D shown in Fig. 48 is an example of a lateral discharge type airless characteristic discharge mechanism. The dispenser D has an airless pump 70L and a cylinder mechanism 60L.

[0242] The airless pump 70L has a head 701 having a discharge port 702, and a retaining tube 703 that movably holds the head 701. The retaining tube 703 is connected to a cylinder mechanism 60L, and a break-through tube 66 is formed in the cylinder mechanism 60L.

[0243] When the dispenser D is attached to the mouth 20L of the pouch container 1L, the break-through tube 66 is pierced to break the top film 11. Although not shown in Fig. 48, a spiral tube as shown in Fig. 46 is formed around the break-through tube 66, and when engaging with the pouch container 1L, the spiral tube is screwed into the mouth 20L.

[0244] Here, when the head 701 of the dispenser D is pressed down, the inside of the pouch bag 10L is sucked, and the side surface of the pouch bag 10L contracts with the reduced pressure of the pouch bag 10L, and the volume of the pouch bag 10L decreases. As a result, the contents move to the dispenser D, and a predetermined amount of the contents is discharged to the outside.

[0245] Further, in order to maintain airtightness, the airless pump 70L is provided with an annular packing, a suction valve for opening and closing, and a discharge valve, although these are not shown in the figure.

[0246] As a result, even after the piercing tube 66 pierces the upper film 11, almost no air flows into the dispenser D, so that the contents inside the pouch bag 10L are kept from coming into contact with oxygen as much as possible, and the contents can be maintained in a state where there is little denaturation due to oxidation until the time of discharge.

[0247] When the dispenser D is engaged with the outer container 50L, the screw projection 55 of the upper thin portion 53L of the outer container 50L and the screw projection (not shown) on the side surface of the cylinder mechanism 60L are engaged with each other to be screwed together.

[0248] Furthermore, a cap 30L may be placed on top of the dispenser D. In this case, the side surface of the cap 30L fits into the outside of the retaining tube 703 and stops at the upper end of the cylinder mechanism 60L. Note that, although this example shows a shape in which the cap 30L can cover only the airless pump 70L of the dispenser D, the cap 30L may also be shaped to cover the cylinder mechanism 60L as well.

[0249] In addition, in this configuration, the pouch bag 10L, which is the container body, shrinks according to the remaining amount of content while maintaining a sealed state, so that the remaining amount of content can be confirmed at a glance by checking the shrinkage state of the pouch bag 10L from outside the outer container 50L, which is partially or completely transparent.

[0250] For example, the container is suitable for use as a container for multiple uses of low-viscosity liquids that require airtightness, such as seasoning containers, seasoning tubes, mini travel bottles for cosmetics and sanitary products, retort foods, beverage pouches, and other fluid packaging.

[0251] In addition, in this configuration, by adjusting the diameter of the discharge port 702 of the airless pump 70L shown in FIG. 48 and the type of piston provided therein, the contents can be ejected in a spray form.

[0252] As a result, even in this configuration, the contents do not deteriorate from the opening portion during distribution, and no great force is required when using the contents to the last drop.

[0253] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments described above, and various modifications and variations are possible within the scope of the gist of the present invention as described in the claims.

[0254] This application claims priority to Japanese Patent Application No. 2020-100448, filed on June 9, 2020, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0255] 1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1K, 1L pouch container 10, 10C, 10H, 10I, 10J, 10K, 10L pouch bag 11, 11A, 11B, 11α, 11β Top film (first film) F11 Top film material 111 Resin layer (outer resin layer) 112 Metal layer (air barrier layer) 113 Resin layer (inner resin layer) 12, 12A, 12C, 13, 13A, 13C Side film (second film) F12, F13 side film material 121,131 Resin layer (outer resin layer) 122,132 Metal layer (air barrier layer) 123,133 Resin layer (inner resin layer) 14 Side film (second film) 15 Top film (first film) 16 Bottom film (second film) 17 Side film 17F Film material 20,20A,20B,20C,20D,20E,20F,20G,20H,20I,20J,20K,20L,20α,20β Mouth (spout, mouth member) 21 Flange 22 Standing part 23 Spiral protrusion 24 Anti-rotation 3,30,30L Cap 31 Lower Cap 311 Side wall 312 Spiral groove 313 Breakthrough plug 32 Top Cap 33 Inner stopper 34 O-ring 39 Stopper ring 4 Containers with caps 5,5K,5L Double container (double container with discharge mechanism) 50,50K,50L outer container 60K,60L Cylinder mechanism 65 Spiral tube 66 Breakthrough Cylinder 70 Pump section 80 Cylindrical cover F Pump head (discharge mechanism) G Pump head with tray (mechanism) D. Dispenser

Claims

1. a step of fusing a resin layer on the inside of an end portion of the first film and a resin layer on the inside of an end portion of one or more second films to form a pouch bag having an opening at one end; a step of molding a resin mouth member having a flange and a standing portion from the same resin material as the outer resin layer of the first film; a step of attaching a lower surface of the resin flange of the mouth member to an outer resin layer of the first film of the pouch bag by welding the resin integrally by any one of ultrasonic, heat, and high frequency welding; filling the pouch with contents through the open end; and a step of sealing the one end to close the pouch bag and seal the inside. A method for manufacturing a pouch container.

2. a step of fusing a resin layer on the inside of an end portion of the first film and a resin layer on the inside of an end portion of one or more second films to form a pouch bag having an opening at one end; a step of insert-molding a mouth member having a flange and a standing portion with a resin of the same material as the outer resin layer of the first film, and bringing a lower surface of the flange of the mouth member into close contact with the outer resin layer of the first film of the pouch bag; filling the pouch with contents through the open end; and a step of sealing the one end to close the pouch bag and seal the inside. A method for manufacturing a pouch container.

3. the first film is a hexagonal top film; The second film is a pair of side films each having a shape in which the upper side of a rectangle and the lower base of a trapezoid are continuously formed, The process of forming the pouch bag includes: A process of fusing the outer edges of three continuous sides of the hexagonal top film to three ends of one of the side films, which are the upper base and legs of the trapezoid; A step of fusing a side edge of the rectangle of one side film and an end portion of the rectangle of the other side film; and and fusing the outer edges of the other three sides of the hexagonal top film to the three ends of the other side film, which are the upper base and legs of the trapezoid. A method for producing the pouch container according to any one of claims 1 to 2.

4. The one end of the pouch is fused to close the pouch to seal the inside, and then The apexes of the lower ends of the two side films are folded and the apexes are bonded together. A method for producing the pouch container according to claim 3.

5. the first film is a circular top film; the second film is a strip-shaped side film, The process of forming the pouch bag includes: A process of rolling and fusing one end of a strip-shaped side film to an outer peripheral edge of a circular top film having a resin layer on its outer surface; and fusing the side ends of the rolled belt-like side film perpendicular to the end where the top film is disposed, A method for producing the pouch container according to any one of claims 1 to 2.

6. The first film is a top film having a shape in which the top side of a rectangle and the bottom side of a trapezoid are continuously formed, The second film is a hexagonal side film and a bottom film having a shape in which the top side of a rectangle and the bottom base of a trapezoid are continuously formed, The process of forming the pouch bag includes: A process of fusing the outer edges of three continuous sides of the hexagonal side film to three ends of the top film, which are the upper base and legs of the trapezoid; A step of fusing the side of the rectangle of the upper film and the end of the rectangle that is the side of the rectangle of the lower film; and The process includes a step of fusing the outer edges of the other three sides of the hexagonal side film to the three ends of the lower film, which are the upper base and legs of the trapezoid. A method for producing the pouch container according to any one of claims 1 to 2.

7. A spiral projection is formed on the outer circumferential surface of the upright portion of the mouth member. A method for producing the pouch container according to any one of claims 1 to 6.

8. A step of forming a first film including an air barrier layer including a metal or an inorganic substance, and an outer resin layer and an inner resin layer sandwiching the air barrier layer; and forming a second film including an air barrier layer containing a metal or an inorganic substance and a resin layer on the inner side of the air barrier layer. A method for producing the pouch container according to any one of claims 1 to 7.

9. The lower surface of the flange of the mouth member and the outer resin layer of the film to which the mouth member is attached are made of a thermoplastic olefin-based or PET resin. The method for producing the pouch container according to claim 8.

10. The metal contained in the air barrier layer is aluminum. The method for producing the pouch container according to claim 8 or 9.

11. The air barrier layer containing an inorganic material is a resin film layer on which silica is vapor-deposited. The method for producing the pouch container according to claim 8 or 9.

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