JP2022154178A - pouch with spout - Google Patents

Abstract

An object of the present disclosure is to provide a pouch with a spout that reduces the amount of plastic used, maintains the self-standing of the pouch, and is excellent in filling aptitude with contents. SOLUTION: The present disclosure is a spout pouch 100 comprising a pouch body 10 having a front face portion 11, a rear face portion 12 and a bottom face portion 14, and a spout body 31 joined to the upper edge of the pouch body 10. The front surface portion 11 and the rear surface portion 12 are composed of a laminated sheet including at least a paper base layer 61 and a heat adhesive layer 62 from the outside, and the bottom surface portion 14 is a folded portion toward the pouch body 10. 13, and is composed of a laminated sheet including at least a synthetic resin film base layer 53 and a heat adhesive layer 52 from the outside. [Selection diagram] Fig. 1

Description

TECHNICAL FIELD The present disclosure relates to a spout-equipped pouch that is filled with a fluid such as a liquid and that is poured out from the spout.

Conventionally, pouches made of flexible packaging material are used for bags for hermetically packaging liquid contents such as juice, nutritional drinks, and jelly. There is a pouch with a spout into which the deoccluder is inserted.
Pouches are generally of flat pouch type or stand pouch type.

A flat pouch is obtained by heat-sealing a front surface portion and a rear surface portion, the inner surfaces of which are composed of a heat-adhesive resin layer, to form a sealed portion.
The pouch with spout further has a bottom folded inwardly of the pouch along a fold line so as to be self-supporting. In the standing pouch type pouch with a spout as described above, when the content is filled, the lower portion of the pouch swells due to the weight of the filled content, thereby expanding the bottom portion and maintaining the self-sustainability. The stand-pouch type configuration as described above provides a display effect. For example, Patent Literature 1 discloses flat pouch type and stand pouch type pouches with spouts.

JP-A-2002-145286

By the way, it is recommended to reduce the amount of plastic (synthetic resin) to be used due to the recent heightening of environmental problems. In order to reduce the amount of plastic used, it is required to use a paper base material for the laminated sheet of the body even in pouches with spouts.

However, if a rigid paper base material is used for the laminated sheet of the bottom part in this way, it becomes difficult to expand the folded bottom part, and there is a possibility that the productivity is lowered when the contents are filled.

The present disclosure has been made in view of such problems. do.

That is, the pouch with a spout according to one embodiment is a pouch with a spout comprising a pouch body having a front surface, a rear surface, and a bottom, and a spout body joined to the upper part of the pouch body. the front surface portion and the rear surface portion are composed of laminated sheets including at least a paper base layer and a heat adhesive layer from the outside, the bottom surface portion has a folded portion toward the pouch body, and and a laminated sheet including a synthetic resin film substrate layer and a heat adhesive layer from at least the outside.

Advantageous Effects of Invention According to the present disclosure, it is possible to reduce the amount of plastic used, maintain the independence of the pouch, and provide a pouch with a spout that is excellent in filling aptitude with contents.

1 is a front view of a pouch with a spout according to this embodiment; FIG. The perspective view of the pouch with a spout shown in FIG. FIG. 2 is an exploded view of the members constituting the pouch body shown in FIG. 1; FIG. 2 is a cross-sectional view of an example of the layer structure of the front sheet and the rear sheet of the pouch body shown in FIG. 1; FIG. 2 is a cross-sectional view of another embodiment of the layer structure of the front sheet and the rear sheet of the pouch body shown in FIG. 1; FIG. 2 is a cross-sectional view of an example of the layer structure of the bottom sheet of the pouch body shown in FIG. 1; FIG. 2 is a cross-sectional view of another embodiment of the layer configuration of the bottom sheet of the pouch body shown in FIG. 1; FIG. 2 is a cross-sectional view of another embodiment of the layer configuration of the bottom sheet of the pouch body shown in FIG. 1; The front view of the spout main body shown in FIG. FIG. 2 is a side view of the spout main body shown in FIG. 1; FIG. 9B is a cross-sectional view taken along AA in FIG. 9A;

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, the present disclosure is not limited to these specifically shown forms or to the various specifically described structures.
In addition, in each drawing, the sizes and ratios of members may be changed or exaggerated for the sake of clarity. In addition, for the sake of clarity, parts that are not necessary for explanation or repeated symbols may be omitted.

In addition, numerical values such as dimensions and material names of each member described in this specification are examples as an embodiment, and are not limited to these, and can be appropriately selected and used. In this specification, terms specifying shapes and geometrical conditions, such as parallel, orthogonal, perpendicular, central, etc., include not only strictly meanings but also substantially the same states.

FIG. 1 is a front view of a spouted pouch 100 of the present disclosure, and FIG. 2 is a perspective view of the spouted pouch 100 of the present disclosure.

The pouch 100 with spout of the present disclosure is attached via a spout joint 312 sandwiched between a pouch body 10 for hermetically packaging contents and an upper edge seal portion 21 of the pouch main body 10. It is composed of a spout main body 31 .
Here, the spout assembly 30 includes a spout main body 31 and a cap 32, which will be described later. If the cap 32 is to be attached in a post-process, the spout-equipped pouch including the spout main body 31 is included in the spout-equipped pouch 100 .

In this embodiment, an example in which the pouch body 10 is of a self-supporting type will be described. For example, in FIG. 2, the bottom portion of the pouch body 10 is a so-called bottom gusset bag in which a gusset M is formed in the bottom edge seal portion 24 .
In this specification, the terms “bottom”, “upper” and “side”, and the terms “vertical direction” and “horizontal direction” are used with the pouch body 10 standing on its own. It represents the position and direction of 10 and its constituent elements.

The pouch body 10 includes a body part 1 having a filling part S filled with a fluid and having an open lower end, and a bottom part 2 attached to cover the opening of the pouch body 10 . The body 1 includes a front portion (front sheet 11) and a rear portion (rear sheet 12) forming a fill S therebetween. In the following description and drawings, unless otherwise specified, the front surface portion 11 and the rear surface portion 12 forming the body portion 1 have symmetrical shapes. That is, the constituent elements of the front surface portion 11 and the constituent elements of the rear surface portion 12 are substantially the same. Therefore, in the following description, the shape of the front surface portion 11 will be mainly described, and the description of the shape of the rear surface portion 12 will be omitted.

In this embodiment, the bottom portion 14 constitutes the bottom portion 2 of the pouch body 10 when the pouch body 10 stands on its own.

The pouch body 10 is configured to contain a fluid liquid such as juice, energy drink, jelly, etc., but may contain fluid powder or granules. That is, the term "fluid" is a concept that includes not only liquids but also a wide range of fluid substances such as many powders and granules.

Further, the body portion 1 is formed by joining the front sheet 11 and the rear sheet 12 to each other by heat welding or the like. In this case, the body portion 1 is divided into a sealed portion where the front sheet 11 and the rear sheet 12 are joined and an unsealed portion where the front sheet 11 and the rear sheet 12 are not joined.

The body portion 1 and the bottom portion 2 will be described in detail below.
FIG. 3 is an exploded view of the members forming the pouch body 10. FIG. As shown in FIG. 3, in this embodiment, the pouch body 10 is composed of three sheets, a front sheet 11, a rear sheet 12 and a bottom sheet . Of these, the front sheet 11 and the rear sheet 12 constitute the trunk section 1 , and the bottom sheet 14 constitutes the bottom section 2 .

The body portion 1 is formed by heat-welding the inner surface 11x of the front sheet 11 and the inner surface 12x of the rear sheet 12 so that an opening exists in the portion that will become the bottom edge 44 of the pouch body 10 . In this case, the body portion 1 has a sealed portion where the inner surface 11x of the front sheet 11 and the inner surface 12x of the rear sheet 12 are heat-sealed, and an unsealed portion where the front sheet 11 and the rear sheet 12 are not heat-sealed. , In this specification, the “inner surface” is the surface facing the fluid L filled in the pouch body 10 . In FIG. 3, the outer surface opposite to the inner surface 11x of the front sheet 11 and the outer surface opposite to the inner surface 12x of the rear sheet 12 are designated 11y and 12y, respectively.

As shown in FIG. 1, the seal portion of the trunk portion 1 includes a pair of side edge seal portions 22 extending along the pair of side edges and an upper edge seal portion 21 extending along the upper edge. The filling portion S described above is defined in a space surrounded by a pair of the side edge seal portion 22 and the upper edge seal portion 21 . The inner surface 11x of the front sheet 11 and the inner surface 12x of the rear sheet 12 of the trunk section 1 are heat-welded to the inner surface 14x of the bottom sheet 14 of the bottom section 2 to form the bottom edge seal portion 24. FIG. The bottom edge seal portion 24 is a seal portion formed to close the opening of the trunk portion 1 .

Next, the bottom part 2 will be explained. As shown in FIG. 3 , in the present embodiment, the bottom sheet 14 is folded back to form the folded portion 43 of the bottom portion 2 , and the folded portion 43 protrudes toward the inside of the pouch body 10 . The inner surface 14x of the sheet 14 is attached to the body 1 by thermally welding the inner surface 11x of the front sheet 11 and the inner surface 12x of the rear sheet 12 of the pouch body 10 . A portion of the bottom sheet 14 that is heat-sealed to the front sheet 11 is called a first portion 41 , and a portion that is heat-sealed to the rear sheet 12 is called a second portion 42 . The folded portion 43 is positioned between the first portion 41 and the second portion 42 . The bottom portion 2 is configured to extend from one side edge seal portion 22 of the pair of side edge seal portions 22 of the trunk portion 1 to the other side edge seal portion 22 . By adopting such a configuration, the spout-equipped pouch 100 is excellent in self-standing and filling aptitude. Although FIG. 3 shows an example in which the folded portion 43 is formed as a bent portion by sharply folding the bottom sheet 14, the present invention is not limited to this, and the folded portion 43 is formed as a curved portion. may have been

Next, an example of the layer structure of the front sheet 11, the rear sheet 12 and the bottom sheet 14 will be described.
First, the layer structure of the front sheet 11 and the rear sheet 12 will be described with reference to FIGS. 4 and 5. FIG. As shown in FIG. 4 , the front sheet 11 and the rear sheet 12 each include a paper base layer 61 and thermal adhesive layers 62 provided on both sides of the paper base layer 61 . In the example shown in FIG. 4, the paper base layer 61 constitutes the intermediate layer, and the heat adhesive layer 62 constitutes the outer surfaces 11y, 12y and the inner surfaces 11x, 12x of the front sheet 11 and the rear sheet 12. there is The paper base material layer 61 may be printed with a pattern or the like.

Furthermore, as shown in FIG. 5, the front sheet 11 and the rear sheet 12 may further include a barrier layer 65 and a strength-enhancing layer 66 disposed between the paper base layer 61 and the thermal adhesive layer 62. good.

Next, materials forming the front sheet 11 and the rear sheet 12 will be described.

The material constituting the paper base layer 61 is not particularly limited as long as it has rigidity, and is appropriately selected depending on the contents to be filled in the pouch body 10 and in consideration of water resistance (sizing degree) and the like. can be used
As specific examples, woodfree paper, bleached kraft paper, base paper for cups, base paper for milk cartons, etc. can be preferably used, and the appropriate basis weight thereof is in the range of 80 g/m ² to 320 g/m ² .

Examples of materials constituting the thermal adhesive layer 62 include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), and single site catalyst. Polymerized ethylene/α-olefin copolymer, ethylene/vinyl acetate copolymer (EVA), ethylene/acrylic acid copolymer (EAA), ethylene/methacrylic acid random copolymer (EMAA), ethylene/ Methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA), ionomer, polypropylene and its copolymer, polyester resin, etc. can be used. It can be appropriately selected and used according to the contents to be stored and the conditions of storage and use.

Among the materials constituting the thermal adhesive layer 62 are low density polyethylene (LDPE) and linear low density polyethylene (LLDPE). It has excellent low-temperature heat-sealing properties and is also excellent in thin-film formability, so the outermost thermoadhesive resin layer, which does not require much thickness, is extruded with a relatively thin thickness of, for example, 6 μm to 10 μm. It is also easy to coat and laminate, and it is possible to reduce the use ratio of plastic materials, and at the same time, it is possible to obtain merits in terms of cost.

The heat-adhesive layer 62 can be laminated by extruding a resin thereon after being subjected to easy-adhesion treatment such as anchor coating, corona treatment, flame (flame) treatment, etc., if necessary, or by applying a heat-adhesive resin. A film can be formed in advance and laminated by laminating by a known dry lamination or extrusion lamination (sandwich lamination) or the like.

As a material constituting the barrier layer 65, any material can be used as long as it can impart gas barrier properties such as vapor barrier properties and light shielding properties. As specific examples, for example, in addition to metal foil such as aluminum foil, metal or inorganic oxide such as aluminum, silica, alumina, biaxially stretched polyethylene terephthalate film (hereinafter, PET film), biaxially stretched nylon film (hereinafter, ON film), a biaxially oriented polypropylene film (hereinafter referred to as OPP film), and the like, and a vapor-deposited film obtained by vapor deposition to a thickness of 20 to 100 nm can be used. Alternatively, saponified ethylene-vinyl acetate copolymer film (hereinafter referred to as EVOH film), biaxially oriented nylon MXD6 film, polyacrylonitrile film, and PET film, ON film, and OPP provided with a coating layer of polyvinylidene chloride A film or the like can be used.

The barrier layer 65 is preferably laminated on the inner surface of the paper base layer 61 in order to effectively utilize its barrier properties. When used, it can also be laminated on the outer surface of the paper base layer 61 in order to utilize the metallic effect in the design. Lamination of the barrier layer 65 can be easily performed by known dry lamination, extrusion lamination (sandwich lamination), or the like.

As a material constituting the strength improving layer 66, for example, a biaxially oriented polyethylene terephthalate film (hereinafter referred to as PET film), a biaxially oriented nylon film (hereinafter referred to as ON film), a biaxially oriented polypropylene film, etc. can be used. . In this case, the puncture resistance and pinhole resistance of the pouch body 10 can be enhanced.

Next, the layer structure of the bottom sheet 14 will be described with reference to FIGS. 6 to 8. FIG. As shown in FIG. 6 , the bottom sheet 14 includes a synthetic resin film base layer 53 and a thermal adhesive layer 52 provided on the synthetic resin film base layer 53 . In the example shown in FIG. 6, the synthetic resin film base layer 53 constitutes the outer surface 14y of the bottom sheet 14, and the thermoadhesive layer 52 constitutes the inner surface 14x of the bottom sheet 14. As shown in FIG.

In addition, as shown in FIG. 7, the bottom sheet 14 may further include a barrier layer 55 arranged between the synthetic resin film base layer 53 and the thermal adhesive layer 52 . Further, as shown in FIG. 8, a strength improving layer 56 may be further provided between the barrier layer 55 and the thermal adhesive layer 52 .

As a material constituting the synthetic resin film base layer 53, it is sufficient if it has heat resistance, and for example, a PET film, an ON film, an OPP film, or the like can be used.

As a material forming the thermal adhesion layer 52, the same material as the thermal adhesion layer 62 can be used.

As a material forming the barrier layer 55, the same material as the barrier layer 65 can be used.

As a material forming the thermal adhesion layer 52, the same material as the thermal adhesion layer 62 can be used.

Since the adhesive layer 54 between each layer is normally laminated by a dry lamination method, a dry lamination adhesive such as a two-liquid curable polyurethane adhesive can be used. Further, the anchor coat is a kind of primer coat, which is applied in advance to the synthetic resin film base layer 53 side in order to improve adhesion when resin is laminated by extrusion coating.

The total thickness of the bottom sheet 14 is preferably in the range of, for example, 40 μm or more and 120 μm or less. Within the above range, the bottom sheet 14 has sufficient folding performance.

Needless to say, the layer structure of the front sheet 11, the rear sheet 12, and the bottom sheet 14 is not limited to that described above.

Next, the spout main body 31 will be described. 9A is a front view, FIG. 9B is a side view, and FIG. 9C is a cross-sectional view cut along AA in FIG. 9A. As shown in FIG. 9A, in the present embodiment, spout main body 31 has outer cylindrical portion 311 as a main body, and joint base portion 312 that is joined to pouch main body 10 is provided at the lower portion. Furthermore, a clogging prevention portion 313 is provided at the lower portion of the joint base portion 312 to prevent clogging of the flow path of the liquid due to close contact between the container walls.

A male screw 315 is provided on the outer cylindrical portion 311 and can be screwed with a female screw provided inside the separate cap 32 .

A flange portion 316 is provided between the outer cylindrical portion 311 and the joint base portion 312 . By providing the flange portion 316, the transportation of the spout assembly 30 by the transportation conveyor is facilitated.

The joint base part 312 has an inner cylindrical part 317 that serves as a liquid passage, and its outer peripheral surface is joined to the upper edge seal part 21 of the pouch body 10 . The spout main body 31 is attached to the pouch main body 10 by thermal bonding between the inner surfaces 11x and 12x of the front sheet 11 and the rear sheet 12 with the joint base 312 sandwiched therebetween.

The blockage preventing portion 313 is provided at the lower portion of the inner cylindrical portion 317 and includes a fluid guide path 318 having three to four partition walls 314 extending downward, and a plurality of partition walls 314 provided at intervals in the circumferential direction. to the joint base 312 , and a connecting portion 320 that connects the fluid guide path 318 to the inner cylindrical portion 317 in the joint base 312 via the opening between the joint bases 319 .
By providing the blockage preventing portion 313, it is possible to prevent the flow path of the liquid from being blocked by the front sheet 11 and the rear sheet 12 of the pouch body 10 coming into close contact with each other.

The material of the spout body 31 is not particularly limited as long as it can be thermally adhered to the inner surfaces 11x and 12x of the pouch body 10. For example, polypropylene, medium-density or high-density polyethylene, polyester, and the like can be used. can.

The cap 32 is not limited to a screw type, and may be a plugging type.

Next, an example of a method for manufacturing the pouch with spout 100 will be described.

First, the elongated front sheet 11, rear sheet 12 and bottom sheet 14 are prepared. At this time, the inner surface 11x of the front sheet 11 and the inner surface 12x of the rear sheet 12 face each other. Further, the bottom sheet 14 is folded back so that the folded portion 43 protrudes upward. Next, the bottom sheet 14 is inserted between the side edges of the front sheet 11 and the rear sheet 12 . Thereafter, the inner surface 14x of the bottom sheet 14, the inner surface 11x of the front sheet 11, and the inner surface 12x of the rear sheet 12 are heat-sealed to form the side edge seal portions 22 and the bottom edge seal portions 24 in a predetermined pattern. formed into an open bag. Next, the joint base 312 of the spout main body 31 is inserted into the openings of the upper edges of the front sheet 11 and the rear sheet 12, and the joint base 312 is sandwiched between the inner surfaces 11x and 12x of the front sheet 11 and the rear sheet 12. It is attached to the pouch body 10 by heat bonding in such a manner that the pouch 100 with a spout is manufactured. Then, the contents are filled from the spout main body 31, and the cap 32 is attached to the spout main body 31, so that the pouch 100 with spout can be packaged.

According to the present embodiment, the front sheet 11 and the rear sheet 12 constituting the spout-equipped pouch 100 are made of a paper base material, and the bottom sheet 14 is made of a synthetic resin film base material. In addition to reducing the amount of used, the pouch can maintain its self-sustainability, have excellent filling aptitude, and improve the production yield.

Next, specific examples in the above embodiment will be described, but the present disclosure is not limited to the description of the following examples as long as the gist thereof is not exceeded.

(Example 1)
In producing the spout-equipped pouch 100 of the present embodiment, first, a laminated sheet of a front sheet 11 and a rear sheet 12 was prepared.

First, as the paper base layer 61, base paper for liquid paper containers (manufactured by Nippon Paper Industries Co., Ltd.) having a basis weight of 150 g/m ² was prepared. Then, gravure printing was performed on a predetermined position of the paper base material layer 61 to form a pattern printed layer.

On the other hand, a 12 μm biaxially stretched PET film (product name: E-5102 manufactured by Toyobo Co., Ltd.) was prepared as the strength improving layer 66 . After applying a dry laminating adhesive to one surface of the strength improving layer 66 , a 7 μm thick aluminum foil (manufactured by Toyo Aluminum Co., Ltd., product name: 1N30) was dry laminated as a barrier layer 65 .

Next, the barrier layer 65 of the laminate sheet (laminate sheet in which the barrier layer 65 and the strength-enhancing layer 66 are bonded) bonded in the above process is placed on the inner surface of the printed paper base layer 61. was laminated by extrusion lamination (sandwich lamination) with a 20 μm-thick EMAA (manufactured by Mitsui Dow Polychemicals, product name: N0908N) as a melted adhesive layer 64 interposed therebetween.

Next, a 40 μm-thick LDPE (manufactured by Japan Polyethylene Co., Ltd., product name: LC520) is formed as the innermost thermal adhesive layer 62 by extrusion lamination on the opposite side (inner surface side) of the paper base layer 61 of the strength improving layer 66. formed. Next, a 20 μm-thick LDPE (manufactured by Japan Polyethylene Co., Ltd., product name: LC520) was formed as the outermost thermal adhesive layer 62 on the printed surface of the paper base layer 61 by extrusion lamination.

As a result, a laminated sheet of the front sheet 11 and the rear sheet 12 having the following layer structure was produced.

(Outer surface side) LDPE (20 μm)/printed layer such as pattern/paper substrate layer (150 g/m ² )/
EMAA (20 μm) / aluminum foil (7 μm) / PET film (12 μm) /
LDPE (40 μm) (inner surface side)

Next, a laminated sheet for the bottom sheet 14 was prepared.

First, as the synthetic resin film base layer 53, an ON film (product name: N-5342 manufactured by Toyobo Co., Ltd.) having a thickness of 15 μm was prepared. Then, they were laminated by a dry lamination method via an adhesive for dry lamination, and further laminated with an LDPE film having a thickness of 60 μm. As a result, a bottom sheet 14 having the following layer structure was produced.

(Outer surface side) ON film (15 μm) / adhesive layer / LDPE (60 μm)

The inner surface 11x of the front sheet 11 obtained above and the inner surface 12x of the rear sheet 12 were arranged to face each other. The bottom sheet 14 obtained above was folded in advance so that the inner surface 14x faces outward. Next, after inserting the bottom sheet 14 between both side edges of the front sheet 11 and the rear sheet 12, the side edge seal portions 22 and the bottom edge seal portions 24 are heat-sealed from the outer surface side with a hot plate heat seal bar. A bag-like pouch body 10 formed in a pattern and having an upper opening was manufactured.

Next, the joint base 312 of the spout main body 31 is inserted into the openings of the upper edges of the front sheet 11 and the rear sheet 12, and the joint base 312 is sandwiched between the inner surfaces 11x and 12x of the front sheet 11 and the rear sheet 12. A heat seal bar set to an appropriate temperature for heat sealing was attached to the pouch main body 10 by thermal adhesion to prepare a pouch 100 with a spout.

Next, a filling nozzle for filling a liquid content was pressed against the upper opening of the outer cylindrical portion 311 of the spout main body 31, and a sports drink (200 ml) was filled as the content. After that, the cap 32 was attached to the top of the spout main body 31 . As a result, the package of the pouch 100 with spout filled with the sports drink of this example was completed.

(Example 2)
First, a laminated sheet for the bottom sheet 14 was prepared.
First, a 12 μm biaxially oriented PET film (product name: E-5102 manufactured by Toyobo Co., Ltd.) was prepared as the synthetic resin film base layer 53 . After applying an adhesive for dry lamination to one surface of the synthetic resin film base layer 53, a 7 μm-thick aluminum foil (manufactured by Toyo Aluminum Co., Ltd., product name: 1N30) was dry-laminated as a barrier layer 55 . Next, a 40 μm-thick LDPE (manufactured by Japan Polyethylene Co., Ltd., product name: LC520) was formed as the innermost thermal adhesive layer 52 on the surface of the barrier layer 55 by extrusion lamination. As a result, a bottom sheet 14 having the following layer structure was produced.

(Outer surface side) PET film (12 μm)/adhesive layer/AL (7 μm)/adhesive layer/LDPE (40 μm)

A spout-equipped pouch 100 was produced in the same manner as in Example 1 except for the bottom sheet 14 . After that, in the same manner as in Example 1, a package of the spout-equipped pouch 100 was completed.

(Example 3)
First, a laminated sheet for the bottom sheet 14 was prepared.
First, a 12 μm biaxially oriented PET film (product name: E-5102 manufactured by Toyobo Co., Ltd.) was prepared as the synthetic resin film base layer 53 . After applying an adhesive for dry lamination to one surface of the synthetic resin film base layer 53, a 7 μm-thick aluminum foil (manufactured by Toyo Aluminum Co., Ltd., product name: 1N30) was dry-laminated as a barrier layer 55 . Next, it was laminated by a dry lamination method on the surface of the barrier layer 55 with an adhesive for dry lamination interposed therebetween. After that, as the strength improving layer 56, a 15 μm-thick ON film (Toyobo, product name: N-5342) was laminated, and then a 40 μm-thick LDPE (manufactured by Japan Polyethylene Co., Ltd., product name: LC520) was formed by extrusion lamination. As a result, a bottom sheet 14 having the following layer structure was produced.

(Outer surface side) PET film (12 μm)/adhesive layer/AL (7 μm)/adhesive layer/ON film (15 μm)/adhesive layer/LDPE (40 μm)

A spout-equipped pouch 100 was produced in the same manner as in Example 1 except for the bottom sheet 14 . After that, in the same manner as in Example 1, a package of the spout-equipped pouch 100 was completed.

The package body of the pouch 100 with spout of Examples 1 to 3 is configured using the bottom sheet 14 of a flexible packaging material different from the front sheet 11 and the rear sheet 12, so that the folded bottom portion of the pouch body 10 becomes easier to expand, the pouch 100 with a spout can maintain its independence, and the filling amount when filling the contents can be stably secured, so that the filling aptitude of the contents is excellent, and We were able to reduce the amount of plastic used.

1 Body 2 Bottom 10 Pouch body 11 Front part (front sheet)
12 Rear part (rear sheet)
11x, 12x, 14x inner surface 11y, 12y, 14y outer surface 13 folded portion 14 bottom portion (bottom sheet)
20 seal portion 21 upper edge seal portion 22 side edge seal portion 24 bottom edge seal portion 30 spout assembly 31 spout main body 311 outer cylindrical portion 312 joint base 313 blockage prevention portion 314 partition wall 315 male screw 316 flange portion 317 inner cylinder Part 318 Fluid guide path 319 Connection part 320 Communication part 32 Cap 41 First part 42 Second part 43 Folded part 44 Bottom edge 61 Paper base layers 52, 62 Thermal adhesive layer 53 Synthetic resin film base layers 54, 64 Adhesive layer 55, 65 Barrier layers 56, 66 Strength enhancing layer 100 Pouch with spout (with cap)

Claims (1)

a pouch body comprising a front portion, a rear portion, and a bottom portion;
A spout-equipped pouch comprising a spout body joined to the upper edge of the pouch body,
The front part and the rear part are composed of a laminated sheet including a paper base layer and a thermal adhesive layer from at least the outside,
The bottom part has a folded part toward the pouch body, and is composed of a laminated sheet including at least a synthetic resin film base layer and a heat adhesive layer from the outside. pouch.

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