Method for manufacturing a take-out port for a packaging body

Abstract

To acquire high sealability and to surely and easily perform taking-out of an object to be packaged.SOLUTION: A package 11 is constituted by a body member 16 having a storing recessed part 62, and a closing member 14 joined to a flat surface part 61 of an upper end opening of the body member 16. The body member 16 and the closing member 14 are constituted so as to be double-folded together, and a folding part in the closing member 14 includes a swell-molded part 52 for swelling out a part of a flat part 51 acting as a flat plate shape toward the surface side, and a folding line 53 across the swell-molded part 52, to form a take-out port structure. At the middle in a thickness direction in the part having the folding line 53, a sealing layer 43 comprising a metal foil is provided.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a package containing an article, and more particularly to a package that can be opened by folding to remove the article. Packaging outlet manufacturing method Regarding. [Background technology]

[0002] An example of such a package is disclosed in the following Patent Document 1. This package has a slit in a substantially flat portion, and is configured so that the package can be opened by folding the package to break the slit and push out the packaged contents inside.

[0003] However, the relatively hard sheet in which the slits are formed does not necessarily tear reliably when folded, nor does it necessarily tear reliably along the slit line. If the slit does not tear completely, but only partially, or if the tear occurs at a position that is different from the fold position, the packaged goods cannot be removed in a directional flow.

[0004] For this reason, a package as disclosed in Patent Document 2 below has been provided. This package is configured such that a protrusion protruding outward from the outer surface is formed on a synthetic resin sheet to be folded, and a fold line is formed across the surface of the protrusion. The protrusion is triangular in cross section and rhombus in plan view, with the middle part being the highest. A fold line is formed at this highest point. In other words, this structure concentrates the stress applied when folding at the fold line.

[0005] However, because the fold line is a half-cut that is made halfway through the thickness of the container, it is not possible to obtain a high level of sealing performance. For this reason, when packaging food, medicine, cosmetics, etc., the shelf life of the package cannot be extended.

[0006] A package having a metal foil sealant in an intermediate layer to improve the preservation quality of the packaged item is disclosed in, for example, Patent Document 3. However, the portion having the sealant has a flat shape. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Special Publication No. 55-36552 [Patent Document 2] Special Publication No. 2-33594 [Patent Document 2] Patent No. 6393395 Summary of the Invention [Problem to be solved by the invention]

[0008] A main object of the present invention is to provide a container that is highly hermetic and allows the packaged items to be removed reliably and easily. [Means for solving the problem]

[0009] The means for achieving this is a structure for an outlet for removing a packaged item from a package, the outlet being configured with an expansion molded portion that expands a part of a flat portion of a flat plate toward the front side, and a crease that crosses the expansion molded portion, the structure for an outlet for a package being provided with a sealing layer having gas barrier properties and breakability at the middle of the thickness direction of the portion having the crease. The crease is a portion that becomes a folding position in a folding operation, and the crease formed in the expansion molded portion is either broken by folding or is a cut that has been made in advance in the thickness direction and is opened by folding.

[0010] In this configuration, the sealing layer suppresses the deterioration of the sealing property at the fold portion, improving the preservation of the packaged item. The sealing layer also increases the strength of the fold portion, but the fold portion in the bulging molded portion is subjected to stress concentration due to bending, and the entire thickness direction, including the sealing layer, is torn and opened. If the fold is a pre-formed cut, the cut opens, and the sealing layer is torn and opened. The packaged item is then pushed out by further bending after opening. At this time, the bulging molded portion forms an opening for removing the packaged item. Effect of the Invention

[0011] According to this invention, the presence of the sealing layer provides high sealing property and rigidity to the fold portion. Nevertheless, since the fold portion having the sealing layer is formed in the bulging portion, the fold can be opened reliably, and the packaged item can be smoothly removed through the removal opening formed by the folded bulging portion. [Brief description of the drawings]

[0012] [Figure 1] Cross-sectional view of the packaging body. [Diagram 2] FIG. [Diagram 3] 1 is a side view and a front view of the packaging body. [Figure 4] Cross-sectional view taken along line B-B in Figure 3. [Diagram 5] FIG. [Figure 6] FIG. 11 is a cross-sectional view showing another example of the fold. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. 11 is a partially cutaway perspective view of a packaging body according to another example. [Figure 10] 13A and 13B are a plan view and a cross-sectional view of a packaging body according to another example. [Figure 11] 13A to 13C are a plan view, a side view, and a cross-sectional view of a packaging body according to another example. [Figure 12]13A to 13C are a plan view, a side view, and a cross-sectional view of a packaging body according to another example. [Figure 13] 13A and 13B are a plan view and a cross-sectional view of a packaging body according to another example. [Figure 14] 13A and 13B are a plan view and a cross-sectional view of a packaging body according to another example. [Figure 15] FIG. 15 is a cross-sectional view of the package of FIG. 14 in an operative state. [Figure 16] FIG. 11 is a plan view of a packaging body according to another example. [Figure 17] 10A to 10C are explanatory diagrams of a method for manufacturing an outlet for a package according to another embodiment. [Figure 18] 13A and 13B are a plan view and a cross-sectional view of a packaging body according to another example. [Figure 19] FIG. 11 is a cross-sectional view of a cup ramen container incorporating a packaging body according to another embodiment. [Figure 20] 20 is a bottom view of the lid sheet of FIG. 19 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] An embodiment of the present invention will be described below with reference to the drawings.

[0014] The packaging body 11 is used to individually package various items such as food, medicines, cosmetics, pet food, etc. in liquid, paste, powder, granular, etc. forms, and is configured to be opened by folding to remove the packaged items.

[0015] 1 shows a cross-sectional view of a package 11. The package 11 has a closure member 14 that closes a storage space 13 in which a packaged item 12 is stored, and a part of this closure member 14 is a foldable portion. A package removal opening structure 15 (hereinafter referred to as the "removal opening structure") for opening a removal opening for removing the packaged item 12 is formed in the folded portion of the closure member 14.

[0016] The packaging body 11 shown in Fig. 1 has a structure suitable for packaging food such as mayonnaise, jam, etc. As shown in the perspective view of Fig. 2, the closure member 14 of the packaging body 11 is formed in a rectangular plate shape and closes the opening of the main body member 16 which is the main body for accommodating the packaged item 12. In other words, the packaging body 11 is composed of the main body member 16 and the closure member 14. Note that Fig. 1 is a cross-sectional view taken along line AA in Fig. 2.

[0017] The main body member 16 is formed of a flexible synthetic resin, and has a concave storage recess 62 formed inside a flat surface portion 61 forming a rectangular frame shape. There are two storage recesses 62, each of which is the same size, and are arranged with the middle of the longitudinal direction sandwiched between them. A partition wall 63 that is lower than the flat surface portion 61 is provided between the storage recesses 62. The flat surface portion 61 surrounding the storage recess 62 is the portion that is fixed to the closing member 14.

[0018] Regarding the material of the main body member 16, it is possible to use a material that can be bonded to the closure member 14 and that is suitable for the desired requirements such as the properties, form, weight, sealing property, and barrier property of the packaged item. The main body member 16 can be formed by heat press molding, compressed air molding, vacuum molding, etc. If the main body member 16 has a thin wall thickness of, for example, about 0.1 mm, it can be folded without a folding aid (crease), but if the wall thickness is thick, for example, 0.15 mm or more, it is advisable to form a folding aid (crease). However, if a soft material such as a composite film of nylon and polyethylene is used, folding aids may not be required even if the wall thickness is thick.

[0019] The outlet structure 15 is configured by providing a bulging molded portion 52 on a part of the closure member 14, which bulges a part of a flat portion 51 having a flat plate shape toward the front side, and a fold 53 that crosses the bulging molded portion 52.

[0020] FIG. 3 shows a side view and a front view of the packaging body 11, and FIG. 4 shows a cross-sectional view of the packaging body 11 taken along the fold line 53 in the line BB in FIG.

[0021] The closure member 14 is composed of a lower sheet layer 41 and an upper film layer 42 made of synthetic resin, and a sealing layer 43 having gas barrier properties and breakability provided between them. The lower sheet layer 41 is joined to the above-mentioned main body member 16, and constitutes the back side close to the packaged item 12. The upper film layer 42 constitutes the front side remote from the packaged item 12.

[0022] Comparing the thickness of the lower sheet layer 41 and the upper film layer 42, the lower sheet layer 41 is formed to be thicker than the upper film layer 42. In addition, the lower sheet layer 41 is harder than the upper film layer 42.

[0023] The sealing layer 43 is made of, for example, a metal foil, preferably an aluminum foil, and is provided on the entire surface between the lower sheet layer 41 and the upper film layer 42. The sealing layer 43 is not limited to aluminum foil, and may be any material that has barrier properties and is breakable, can form the bulged portion 52, and breaks when folded. For example, paper that has been given barrier properties by coating or the like, or EVAL (registered trademark, EVOH) that has good barrier properties but low tensile strength when made into a film, may be used. Also, composite films of these, resins that have been made into films by coating processing, and films that have been given barrier properties by vapor deposition processing may be used.

[0024] The closure member 14 has the flat portion 51 and the bulged portion 52 described above, and the portion other than the center of the closure member 14 is the flat portion 51. The bulged portion 52 is formed in the center of the closure member 14, and its shape in plan view is an ellipse long in the longitudinal direction of the closure member 14, or a rounded rectangular shape in plan view. The bulged portion 52 is formed to have the same thickness as the flat portion 51, and its longitudinal cross-sectional shape is a semicircular arc.

[0025] The bulging portion 52 is the portion that serves as the outlet, and its shape and size are appropriately set according to the properties, shape, etc. of the packaged item 12.

[0026] The fold 53 is formed from end to end at a position that divides the closure member 14 in two in the longitudinal direction. Therefore, the sealing layer 43 is provided in the middle of the part having the fold 53 in the thickness direction.

[0027] The fold 53 is a portion that becomes a folding position in the folding operation, and the bulging molded portion 52 at the fold 53 is a portion that opens as an outlet. The fold 53 is configured to be torn by the folding operation, or to be opened by folding, with a cut that penetrates in the thickness direction in advance. Examples of the fold that is torn by folding include a half cut that is cut halfway in the thickness direction, and a perforation that has a cut in a broken line.

[0028] In the illustrated example, the fold 53 of the bulging portion 52 is composed of cuts 41a (53a), 42a (53b) that penetrate the lower sheet layer 41 and the upper film layer 42 in the thickness direction (see Figs. 1 and 4). On the other hand, the fold 53 of the flat portion 51 is composed of a cut 42b (53b) that penetrates the upper film layer 42 and a half cut 41b (53a) of the lower sheet layer 41 (see Fig. 4).

[0029] In cases where there is a risk that the fold 53 will widen during molding of the bulging portion 52, causing a large portion of the sealing layer 43 to be exposed or broken, it is advisable to form the cuts constituting the fold 53 shallowly.

[0030] Fig. 5 shows another example of the crease 53 structure in the bulging molded portion 52. The crease 53 in Fig. 5(a) is composed of a cut 42a (53b) penetrating the upper film layer 42 in the thickness direction and a half cut 41e (53a) cut from below in the lower sheet layer 41. The crease 53 in Fig. 5(b) is composed of a half cut 42e (53b) cut from above in the upper film layer 42 and a half cut 41e (53a) cut from below in the lower sheet layer 41. The crease 53 in Fig. 5(c) is composed of a half cut 42e (53b) cut from above in the upper film layer 42 and a cut 41a (53a) penetrating the lower sheet layer 41.

[0031] The structure of the fold 53 is appropriately set depending on the properties such as hardness of the upper film layer 42 and the lower sheet layer 41. The through cut or half cut may have a V-shape in vertical cross section.

[0032] 1, 4, and 5(a) to 5(c), the positions of the folds 53a of the lower sheet layer 41 and the folds 53b of the upper film layer 42 are substantially aligned vertically. There may be some misalignment between the positions of the folds 53a and 53b on the upper and lower sides.

[0033] 5(d), the fold 53a of the lower sheet layer 41 and the fold 53b of the upper film layer 42 are formed at positions that are offset from each other and are aligned parallel to each other at an appropriate distance in a plan view. The folds 53a and 53b are preferably cut through the sheet, but may also be half-cut.

[0034] The distance between the fold 53a of the lower sheet layer 41 and the fold 53b of the upper film layer 42 is such that when the closure member 14 is folded, both folds 53a, 53b open and the sealing layer 43 breaks open.

[0035] When the fold 53a of the lower sheet layer 41 and the fold 53b of the upper film layer 42 are not aligned vertically but are shifted, it is preferable to configure the sealing layer 43 with two layers as shown in Fig. 6(a). That is, as shown in Fig. 6(b), a lower sealing layer 43a made of a thin metal foil is bonded to the top of the lower sheet layer 41, and an upper sealing layer 43b made of a thin metal foil is bonded to the bottom of the upper film layer 42, so that the lower sealing layer 43a and the upper sealing layer 43b are bonded to each other. This bonding is performed so that the bonding strength is weaker than the bonding strength to the lower sheet layer 41 or the upper film layer 42.

[0036] In the case of having such sealing layer 43 and fold 53, an opening is formed when the package is folded as shown in Fig. 6(c). That is, the lower sealing layer 43a is torn at a position corresponding to the fold 53a of the lower sheet layer 41, and the upper sealing layer 43b is torn at a position corresponding to the fold 53b of the upper film layer 42. Then, the lower sealing layer 43a and the upper sealing layer 43b, which have a weak bonding strength, are peeled off from each other, and an opening is formed.

[0037] The closure member 14 of the package 11 having the above-mentioned configuration is manufactured as shown in Fig. 7. That is, a plate-shaped base material 14a having an upper film layer 42 and a lower sheet layer 41 arranged above and below and a sealing layer 43 made of metal foil provided therebetween is press-molded with an upper mold 71 and a lower mold 72 to form a flat portion 51 and a bulged molded portion 52. The press molding can be performed by applying heat or at room temperature.

[0038] The base material 14a is in the form of a long strip, and the folds 53 described above are formed at regular intervals. While the base material 14a is intermittently conveyed, the bulging portions 52 are formed at the folds 53 by the upper die 71 and the lower die 72 described above. After this, the packaged items 12 are filled into the main body member 16, and the closure member 14 is attached to the main body member 16.

[0039] In the package 11 thus constructed, the fold 53 is formed in the thickness direction, but the sealing layer 43 is provided in the middle of the thickness direction of the closure member 14, so that the package is airtight. Moreover, the sealing layer 43 reinforces the vulnerable fold 53 portion to provide rigidity, thereby preventing accidental opening before intentional opening and maintaining the airtightness.

[0040] On the other hand, when removing the packaged article 12, as shown in Fig. 8, the bulging portion 52 is turned downward and both ends of the closure member 14 in the longitudinal direction are folded backward, that is, toward the side having the main body member 16, and the closure member 14 is folded in half at the crease 3. At this time, the partition wall 63 of the main body member 16 functions as an auxiliary (crease) for the folding described above.

[0041] Then, stress is concentrated at the fold 53 at the top of the bulging portion 52, and the fold 53 in the bulging portion 52 opens, and the sealing layer 43 breaks, making it easy to open. At this time, the opening ends of the opposing pair of bulging portions 52 are roughly circular in plan view, allowing the packaged items 12 to flow out smoothly and with directional flow.

[0042] The lower sheet layer 41 of the closure member 14 is thicker than the upper film layer 42, so that folding can be performed reliably and easily.

[0043] In addition, since the bulging portion 52 serves as an outlet, a space for removal can be secured at the same time as opening, and scattering of the packaged item 12 can be prevented at the moment of opening.

[0044] Moreover, since the shape of the bulging portion 52 along the crease 53 is an arc, the packaged goods 12 flow out in a columnar manner and are extremely smooth. If the crease 53a of the lower sheet layer 41 and the crease 53b of the upper film layer 42 are aligned vertically, the goods can flow more smoothly and be removed. Furthermore, since the cross-sectional shape is an arc, the bulging portion 52 has good formability even with the sealing layer 43, and a desired opening structure can be obtained.

[0045] When the crease 53a of the lower sheet layer 41 and the crease 53b of the upper film layer 42 are parallel in a plan view, a better sealed state can be obtained than when the creases 53a and 53b are aligned. Moreover, when opening the package, the sealing layer 43 is broken in two places, making it easy to open and allowing the package to be resealed.

[0046] When sealing layer 43 is configured by lower sealing layer 43a and upper sealing layer 43b bonded together, sealing layer 43 is divided into two in the thickness direction, which makes the opening operation easier.

[0047] A package 11 having the following configuration was manufactured, and an opening experiment and an experiment of removing the packaged item 12 were conducted.

[0048] The length and width of the package 11, which is rectangular in plan view, are 65 mm and 40 mm, respectively, and the depth of the storage recess 62 of the main body member 16 is 10 mm. The main body member 16 is made of a co-extruded film of 50 μm nylon and 40 μm polyethylene. The lower sheet layer 41 of the closure member 14 is made of a co-extruded sheet of 40 μm polyethylene and 350 μm polystyrene, the upper film layer 42 is made of a 25 μm polyethylene terephthalate film, and the sealing layer 43 is made of 20 μm aluminum foil. These three sheets were pressed between heated rubber rolls at 130 degrees after applying hot melt adhesive to both sides of the aluminum foil to produce a multi-layered base material 14a as a three-layer laminate. Thereafter, a bulging molded portion 52 with inner dimensions of 6 mm width, 20 mm length, and 3 mm height was formed in the base material 14a by hot press molding to produce the closure member 14.

[0049] The fold 53 was formed from one end to the other of the closure member 14, and the entire fold 53b of the upper film layer 42 and the fold 53a of the bulging portion 52 of the lower sheet layer 41 were composed of through-cuts 41a, 42a, 42b. On the other hand, the fold 53a of the flat portion 51 of the lower sheet layer 41 was a half cut 41b with a depth of 0.2 mm.

[0050] 20 g of strawberry jam was placed as the packaged item 12 in the main body member 16 as described above, and the closure member 14 was heat-welded to the flat surface portion 61 of the main body member 16 to obtain the package 11.

[0051] When the closure member 14 was folded in half in the direction of crushing the main body member 16 in order to open the package 11 and take out the strawberry jam from the outlet, the sealing layer 43 broke at the crease 53 when it was folded at about 70 degrees, and the outlet opened. The strawberry jam flowed out of the outlet in the shape of a round rod with a diameter of about 6 mm, and there was no problem of it splashing around. By continuing to fold it, almost all of the strawberry jam contained therein could be taken out.

[0052] Other examples will be described below. In this description, the same components as those in the above-described configuration will be designated by the same reference numerals, and detailed description thereof will be omitted.

[0053] 9 is a partially cutaway perspective view of a package 11 according to another example. This package 11 has a protective material 54 at fold 53. Protective material 54 is configured in a tape-like shape using a resin film, metal foil, or the like, and covers all or part of fold 53, particularly fold 53 of bulging portion 52, in a peelable or tearable manner.

[0054] In other words, in cases where there is a risk of the package being opened unexpectedly due to a load being applied to bulging portion 52 during transportation, etc., fold 53 is protected. Protective material 54 may be peeled off manually when opening the package, or may be broken when folded.

[0055] 10(a) is a plan view of a packaging body 11 according to another example, and (b) is a cross-sectional view taken along line CC of the packaging body 11. This packaging body 11 has a configuration in which a plurality of packaging body segments 11a are connected in series.

[0056] That is, in this example, two packaging body segments 11a are formed integrally, each having a pair of storage recesses 62 and a bulging molded portion 52. Between the packaging body segments 11a, a slit 17 is formed from the end, the length of which exceeds the fold line 53.

[0057] In the package 11 having such a configuration, different packaged items 12, such as mayonnaise and ketchup, can be packaged, or the same packaged item 12 can be filled.

[0058] A separation structure, such as a perforation, may be formed at the end of the slit 17 .

[0059] For example, a co-extrusion film of 50 μm nylon and 40 μm polyethylene can be used for the main body member 16 in the package 11 configured as described above. Also, for the closure member 14, a sheet obtained by dry-laminating 25 μm PET for the upper film layer 42, 25 μm aluminum foil for the sealing layer 43, and 300 μm A-PET and 40 μm polyethylene for the lower sheet layer 41 can be used.

[0060] 11(a) is a plan view of a package 11 according to another example, (b) is a side view, (c) is a DD cross-sectional view, and (d) is an EE cross-sectional view. This package 11 has a closure member 14 that functions as a main body for containing the packaged item 12, and includes a flat retaining sheet member 18 instead of the main body member 16 of the previous example.

[0061] The closure member 14 has a flat portion 51 around its entire periphery, and a bulging portion 52 in the center. The bulging portion 52 is not formed to a uniform height as in the previous example, but is formed to have a shape with multiple levels of height difference. Specifically, the bulging portion 52 has a shape of a narrow-mouthed bottle cut vertically in half, and a crease 53 is formed across the narrow mouth portion 52a. The mouth portion 52a is lower in height than the other portion, i.e., the bottle-shaped main body portion 52b, and is also shorter in width in a plan view than the other portions.

[0062] Furthermore, the sealing layer 43 is formed to an appropriate width not on the entire surface between the upper film layer 42 and the lower sheet layer 41 but only on the portion where the fold 53 is formed.

[0063] As described above, the holding sheet member 18 is flat and can be folded at positions corresponding to the folds 53 of the closing member 14. The holding sheet member 18 is heat-welded to the entire flat portion 51 of the closing member 14.

[0064] In this way, the outlet of the package 11 is formed in the mouth portion 52a, which is a low-height portion of the bulging molded portion 52 of the closure member 14. If the fold 53 is formed in the high-height portion of the bulging molded portion 52 (bottle-shaped main body portion 52b), a large amount of elongation is required during molding, and there is a risk that the sealing layer 43 will break during molding, but the fold 53 in the low-height portion suppresses elongation during molding. This makes it possible to suppress the occurrence of defective products. Also, since the portions of the bulging molded portion 52 other than the portion where the fold 53 is formed can be formed large, the storage capacity can be increased as desired.

[0065] In the package 11 configured in this way, the height of the portion forming the removal opening is low and the width is narrower than the other portions, so it can be folded and opened with little force. Furthermore, since the removal opening can be formed in the bulging portion 52, stable removal can be achieved without splashing. Also, by pressing and squeezing the portions of the bulging portion 52 other than the fold 53, a certain degree of fluidity is achieved when removing the packaged item 12, and almost all of the packaged item 12 can be removed.

[0066] Since the sealing layer 43 is only provided on a part of the closure member 14, if the parts other than the sealing layer 43 of the closure member 14 and the retaining sheet member 18 are made of a transparent or light-transmitting material, a packaging body 11 can be obtained that allows the packaged item 12 inside to be visually confirmed.

[0067] The packaging body 11 in FIG. 12 differs from the packaging body 11 in FIG. 11 in that the main body member 16 and the closing member 14 have the function of containing the packaged item.

[0068] FIG. 12(a) is a plan view of the package 11, (b) is a side view, (c) is a cross-sectional view taken along line FF, and (d) is a cross-sectional view taken along line GG.

[0069] The main body member 16 is rectangular in plan view, and has two accommodating recesses 62 along the longitudinal direction. The accommodating recesses 62 have a circular shape in plan view, and flat surface portions 61 to be welded to the closure member 14 are formed not only on the outer periphery but also between the accommodating recesses 62.

[0070] The material of the main body member 16 is the same flexible synthetic resin as described above.

[0071] The closure member 14 has the same rectangular shape in plan view as the main body member 16, and a dome-shaped bulging portion 52c that is a part of the bulging portion 52 is formed in a portion corresponding to the storage recess 62. The interiors of the two dome-shaped bulging portions 52c aligned in the longitudinal direction are communicated with each other through a tunnel-shaped bulging portion 52d that has a semicircular arc cross section. The height of the tunnel-shaped bulging portion 52d is lower than that of the dome-shaped bulging portion 52c.

[0072] A fold 53 is formed at the longitudinal intermediate position of the tunnel-type bulging molded portion 52d. A sealing layer 43 is formed at the intermediate portion in the thickness direction of the closure member 14 where the fold 53 is formed, the intermediate portion being wider than the width of the tunnel-type bulging molded portion 52d.

[0073] A dry laminate film of 50 μm nylon and 40 μm polyethylene was used for the main body member 16. A dry laminate film of 50 μm nylon and 40 μm polyethylene was used for the upper film layer 42 of the closing member 14, a 20 μm aluminum foil was used for the sealing layer 43, and a co-extruded sheet of 40 μm polyethylene and 250 μm polypropylene was used for the lower sheet layer 41.

[0074] The fold 53 of the closure member 14 was formed by a through cut within the width of the tunnel-shaped bulging portion 52d, and was formed by a half cut with a depth of about 50% of the thickness of the upper film layer outside the width. A fold 65 was also formed in the main body member 16, and this fold 65 was formed by a half cut with a depth of 30 μm on the nylon side.

[0075] When an opening and removal experiment was conducted on the package 11 having such a configuration, it was possible to stably flow out in a rod-like shape, and it was possible to adjust the amount of outflow by adjusting the pressure from each of the two dome-shaped bulging molded portions 52c. In conventional packages filled with two types of packaged products, when the packaged products have different viscosities, only one of them comes out more, and it was not possible to adjust the amount of outflow, but with this package it is possible to adjust it.

[0076] The packaging body 11 in Fig. 13 is an example formed of a bag. Fig. 13(a) is a front view of the packaging body 11, and Fig. 13(b) is a HH cross-sectional view.

[0077] This package 11 is made of a flexible synthetic resin top sheet 67 and a back sheet 68, and has a flat shape. The top sheet 67 and the back sheet 68 are joined to each other by heat welding at their outer peripheries, and the packaged item 12 is filled inside.

[0078] The outlet structure 15 of the package 11 is formed in the upper part of the top sheet 67. That is, a window portion 67a is formed in the upper part of the top sheet 67, and a closing member 14 that closes the window portion 67a is fixed to this window portion 67a.

[0079] The window portion 67a is a horizontally long oval shape, and the closure member 14 is a horizontally long rectangle that is one size larger than the window portion 67a. A bulging molded portion 52 of a size that fits into the window portion 67a is formed in the portion of the closure member 14 excluding the outer peripheral edge. The vertical cross-sectional shape of the bulging molded portion 52 is a semicircular arc shape, and a fold 53 perpendicular to the longitudinal direction is formed at the midpoint in the longitudinal direction.

[0080] The flat portion 51 on the outer periphery of the closing member 14 is joined to the edge of the window portion 67a by heat welding.

[0081] The upper film layer 42 of the closing member 14 was made of 40 μm polyethylene, the sealing layer 43 was made of 25 μm aluminum foil, and the lower sheet layer 41 was made of 300 μm polyethylene, to form a bulged portion 52 having a width of 15 mm and a height of 5 mm.

[0082] When wheat flour was sealed inside and an opening and removal test was performed, the flour could be smoothly removed from the removal opening when the closing member 14 was folded 180 degrees at the crease 53. There was no scattering of the flour.

[0083] In addition, when sealing the container while not all the flour is removed and there is still flour remaining, the container can be closed by returning the broken bulging molded portion 52 to its original shape.

[0084] The packaging body 11 in Fig. 14 is suitable for storing solid granular material, such as tablets 12a, and a bulging molded portion 52 capable of storing two tablets 12a is formed in the closure member 14. The basic structure is the same as that of the packaging body 11 in Fig. 11 described above, and is composed of a closure member 14 and a retaining sheet member 18, giving the closure member 14 a storage function. Fig. 14(a) is a plan view of the packaging body 11, (b) is a II cross-sectional view, and (c) is a JJ cross-sectional view.

[0085] The closing member 14 is rectangular in plan view, and in the center thereof is formed a bulging portion 52 having an oval shape in plan view and large enough to accommodate two tablets 12a. The bulging portion 52 has a fold 53 that crosses the bulging portion 52 at the midpoint in the longitudinal direction.

[0086] In order to accommodate two tablets 12a, which are the packaged items 12, each having a diameter of 6 mm and a thickness of 3.5 mm, a package 11 having a closing member 14 and a retaining sheet member 18 as described below was obtained.

[0087] The upper film layer 42 of the closing member 14 was made of 25 μm PTT, the sealing layer 43 was made of 25 μm aluminum foil, and the lower sheet layer 41 was made of a co-extruded sheet of 350 μm polystyrene and 40 μm polyethylene. Both sides of the sealing layer 43 were coated with a hot melt adhesive, and the layer was pressed with a rubber roll at 120 degrees while sandwiched between the upper film layer 42 and the lower sheet layer 41 to obtain a three-layer laminate substrate. This substrate was press molded with an upper mold and a lower mold to form a bulging portion 52 with a width of 7 mm, a length of 9 mm, and a height of 4 mm.

[0088] In addition, even if press molding is performed at room temperature in the above configuration, the bulged portion 52 can be formed, but the processing yield is slightly lower depending on the shape. If the molding height is 0.5 times or more larger than the molding width, the yield is significantly lower.

[0089] The folds 53 of the closure member 14 include a 7 mm long fold consisting of a penetrating cut formed in the bulged portion 52 in the upper film layer 42, a 7 mm long fold consisting of a penetrating cut formed in the bulged portion 52 in the lower sheet layer 41, and a half-cut fold consisting of a 0.3 mm deep cut on both sides of the bulged portion 52 in the lower sheet layer 41.

[0090] The holding sheet member 18 was made of a laminate film of 25 μm aluminum foil and 40 μm polyethylene.

[0091] With the tablet 12a contained within the closure member 14, the closure member 14 and the retaining sheet member 18 were joined together by welding, thereby obtaining the package 11.

[0092] When an opening and removal experiment was conducted on the package 11 having such a configuration, when the closing member 14 was folded in half toward the holding sheet member 18 side and folded at about 60 degrees, the sealing layer 43 broke and the removal opening was opened. When it was folded further at about 160 degrees, two tablets 12a fell out of the removal opening, which had an opening width of about 7 mm, as shown in Figure 15.

[0093] The packaging body 11 in Fig. 16 is suitable for containing solid granular material, such as tablets 12a, and differs from the packaging body 11 in Fig. 14 in that multiple packaging body segments 11a, each having a bulging portion 52 in the closure member 14 capable of containing one tablet, are arranged in a row in the vertical and horizontal directions. Separation lines 17a are formed between the packaging body segments 11a to enable separation. The structure of the packaging body segments 11a is basically the same as that of the packaging body 11 in Fig. 14 described above, except for the size.

[0094] Moreover, since the bulging portion 52 is formed so as to accommodate one round tablet 12a, the bulging portion 52 where the fold 53 is formed is dome-shaped, unlike the package 11 in FIG.

[0095] That is, although it depends on the size of the bulge molded portion 52, a portion that is significantly deformed is formed near the fold 53. For this reason, when molding the bulge molded portion 52, defects such as the fold 53 opening more than necessary or the sealing layer 43 breaking may easily occur.

[0096] Therefore, in a manufacturing method for an outlet structure having a bulged molded portion 52 of this type, when press-molding a plate-shaped base material 14a having a sealing layer 43 made of metal foil in the middle of the thickness direction, the upper mold 71 is divided and the portion corresponding to the fold 53 is pressed and molded before the other portions.

[0097] Specifically, as shown in (a) of Figure 17, an upper mold 71 having a hemispherical recess and a lower mold 72 having a hemispherical protrusion are used, and the portion of the upper mold 71 corresponding to the fold 53 of the substrate 14a is provided with another split mold 71a that moves relative to other portions.

[0098] That is, during molding, as shown in Fig. 17(b), the split mold 71a of the upper mold 71 descends first to press the vicinity of the fold 53 of the base material 14a. In this state, the upper mold 71 is descended to mold the base material 14a, and the flat portion 51 and the bulging molded portion 52 are formed.

[0099] By pressing the fold 53 portion first and then molding the entire portion in this manner, opening of the fold 53 can be prevented even in the case of a tall bulge molded portion 52 or an bulge molded portion 52 having narrow and deeply drawn portions on both sides of the fold 53, and inconveniences such as the sealing layer 43 being torn or stretched and thinned can be avoided.

[0100] In addition to the hot press, similar molding can also be performed at room temperature, but depending on the shape, the processing yield may be reduced by 5 to 40%.

[0101] The package 11 in Fig. 18 is different from the package 11 in Fig. 16 and is suitable for storing a predetermined number of pills 12b. The shape of the bulging portion 52 of the closing member 14 is the same as that in Fig. 16, but its size is formed to be suitable for storing a predetermined number of pills 12b, for example, the number of pills to be taken at one time. Fig. 18(a) is a plan view of the package 11, and (b) is a KK cross-sectional view.

[0102] Further, the sealing layer 43 of the closure member 14 is provided only in the vicinity of the fold 53, and the upper film layer 42 and the lower sheet layer 41 of the closure member 14 are made of a transparent material that allows the inside to be visually observed.

[0103] For example, the upper film layer 42 of the closing member 14 may be made of 25 μm PET, the lower sheet layer 41 may be made of a sheet obtained by dry laminating 300 μm A-PET with 40 μm polyethylene, and the sealing layer 43 may be made of 25 μm aluminum foil cut to a width of 5 mm. The holding sheet member 18 may be made of a laminate film made of 40 μm polyethylene and 25 μm PET.

[0104] 19 shows an example in which the outlet structure 15 is incorporated into a cup ramen container 69. That is, a package 11 that contains ingredients and soup is integrated with a lid sheet 69b that covers the upper opening of a container body 69a that contains noodles.

[0105] Specifically, similarly to the packaging body 11 shown in FIGS. 11 and 14 described above, the closing member 14 functions as the main body of the container, and the lid sheet 69b is used in place of the holding sheet member 18. In FIG.

[0106] As shown in Fig. 20, which is a bottom view of the lid sheet 69b, the closure member 14 has a plurality of bulging portions 52 that are independent of each other, and the areas around these bulging portions 52 and between the bulging portions 52 are flat portions 51. The bulging portions 52 have an elliptical shape in plan view and an arc-shaped vertical cross section, and two of them are arranged side by side. The fold 53 is formed so as to cross the two bulging portions 52. The closure member 14 is fixed to the back surface of the lid sheet 69b by adhesion, heat welding, or the like.

[0107] In the cup ramen container 69 configured in this manner, when the cover sheet 69b is opened and one side of the closure member 14 is folded back in the process, it bends at the crease 53, opening the outlet. When the container body 69a is tilted in this state, the ingredients and the like inside the bulging portion 52 fall out.

[0108] Then, hot water is poured in to close the lid sheet 69b. While the lid sheet 69b is closed, the closing member 14 is present on the rear surface of the lid sheet 69b, so that the lid sheet 69b can be prevented from curling upward.

[0109] In addition to incorporating the packaging body 11 into the lid sheet 69b in this manner, the packaging body 11 can also be attached to the back surface of the lid sheet 69b by, for example, pasting.

[0110] The above configuration is one embodiment for carrying out the present invention, and the present invention is not limited to only the above configuration, and other configurations can also be adopted.

[0111] For example, the shape along the fold in the bulging portion may be a shape other than an arc. [Explanation of symbols]

[0112] 11...Packaging body 11a...packaging body fragment 12...Packaged item 14...Closure member 14a...Base material 15...Packaging outlet structure 41...Lower sheet layer 42…Upper film layer 43...Sealing layer 43a...Lower sealing layer 43b...Top sealing layer 51...Flat area 52...Bulging molding part 53…Fold 54…Protective material 71…Upper mold 71a…Split type 72…Lower mold

Claims

[Claim 1] A method for manufacturing an outlet for a package, the outlet for removing a packaged item from the package, is configured with an inflated molded portion that inflates a part of a flat portion of the package toward the front surface, and a crease that crosses the inflated molded portion, When a plate-shaped substrate having an upper film layer and a lower sheet layer disposed above and below and a sealing layer made of a metal foil disposed therebetween is press-molded with an upper mold and a lower mold to form the flat portion and the bulged molded portion, The upper die is divided, and the portion corresponding to the fold is pressed and molded before the other portions. Method for manufacturing a package outlet.

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