Pouch with spout

Abstract

To provide a pouch with a spout that reduces the amount of plastic used, maintains the pouch's self-standing capability, and exhibits excellent suitability for filling contents.SOLUTION: The present disclosure provides a pouch 100 with a spout, comprising a pouch body 10 having a front surface 11, a rear surface 12, and a bottom surface 14, and a spout body 31 joined to an upper edge portion of the pouch body 10. The front surface 11 and the rear surface 12 are made of a laminated sheet including, at least from the outside, a paper substrate layer 61 and a heat adhesive layer 62. The bottom surface 14 has a folded part 43 facing the pouch body 10 and is made of a laminated sheet including, at least from the outside, a synthetic resin film substrate layer 53 and a heat adhesive layer 52.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a pouch with a spout that is filled with a fluid such as a liquid and that dispenses the fluid from the spout. [Background technology]

[0002] Conventionally, pouches made of flexible packaging materials have been used to seal and package liquid contents such as juice, nutritional drinks, and jellies. Some pouches have a spout with a lid attached to the top of the pouch and an anti-blocking part inserted inside the pouch. Generally, pouches are available in flat pouch and stand-up pouch forms.

[0003] The flat pouch is obtained by heat welding together a front surface and a rear surface, the inner surfaces of which are made of a heat-adhesive resin layer, to form a sealed portion. The pouch with a spout has a bottom portion that is folded inward along a fold line to make it self-standing. Note When a pouch with a spout is filled, the weight of the filled contents causes the lower part of the pouch to swell, expanding the bottom and maintaining its independence. The stand-up pouch configuration described above provides a display effect. For example, Patent Document 1 discloses flat and stand-up pouches with a spout. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-145286 Summary of the Invention [Problem to be solved by the invention]

[0005] However, due to the growing concern about the environment in recent years, it is recommended to reduce the amount of plastic (synthetic resin) used. In order to reduce the amount of plastic used, it is required to use a paper base material for the laminated sheet in the body of a pouch with a spout.

[0006] However, if a rigid paper base material is used for the bottom laminate sheet in this way, the folded bottom portion will be difficult to expand, which may reduce productivity when filling the contents. [Means for solving the problem]

[0007] The present disclosure has been made in consideration of such problems, and aims to provide a pouch with a spout that reduces the amount of plastic used, maintains the pouch's self-supporting ability, and has excellent suitability for filling the contents.

[0008] That is, a pouch with a spout according to one embodiment is a pouch with a spout comprising a pouch body having a front portion, a rear portion, and a bottom portion, and a spout body joined to the top of the pouch body, wherein the front portion and the rear portion are made of a laminated sheet including, from at least the outside, a paper base layer and a thermal adhesive layer, and the bottom portion has a folded portion facing the pouch body and is made of a laminated sheet including, from at least the outside, a synthetic resin film base layer and a thermal adhesive layer. [Effects of the Invention]

[0009] According to the present disclosure, it is possible to provide a pouch with a spout that reduces the amount of plastic used, maintains the pouch's self-supporting ability, and has excellent suitability for filling contents. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a front view of the pouch with a spout according to the present embodiment. [Figure 2] FIG. 2 is a perspective view of the spout-equipped pouch shown in FIG. 1. [Figure 3] FIG. 2 is an exploded view of the components constituting the pouch body shown in FIG. 1. [Figure 4] FIG. 2 is a cross-sectional view of an example of the layer structure of the front sheet and rear sheet of the pouch body shown in FIG. 1. [Figure 5] 3 is a cross-sectional view of another example of the layer structure of the front sheet and rear sheet of the pouch body shown in FIG. 1. FIG. [Figure 6] 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. [Figure 7] 3 is a cross-sectional view of another example of the layer structure of the bottom sheet of the pouch body shown in FIG. 1. FIG. [Figure 8] 3 is a cross-sectional view of another example of the layer structure of the bottom sheet of the pouch body shown in FIG. 1. FIG. [Figure 9A] FIG. 2 is a front view of the spout body shown in FIG. 1. [Figure 9B] FIG. 2 is a side view of the spout body shown in FIG. 1. [Figure 9C] 9B is a cross-sectional view taken along line AA in FIG. 9A. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the specifically illustrated embodiments or various specifically described structures. In each drawing, the size and proportions of the components may be changed or exaggerated for ease of understanding. Also, for clarity, unnecessary parts and repeated reference numerals may be omitted.

[0012] Furthermore, the numerical values ​​such as dimensions of each member and the names of materials described in this specification are examples of embodiments, and are not limited to these, and may be selected and used as appropriate. In this specification, terms specifying shapes or geometric conditions, such as parallel, orthogonal, vertical, center, etc., are intended to include not only their strict meanings but also substantially the same state.

[0013] FIG. 1 is a front view showing a pouch 100 with a spout of the present disclosure, and FIG. 2 is a perspective view of the pouch 100 with a spout of the present disclosure.

[0014] The pouch with a spout 100 of the present disclosure is composed of a pouch body 10 for hermetically packaging the contents, and a spout body 31 attached via a spout joint 312 sandwiched between the upper edge seal portion 21 of the pouch body 10. Here, the spout combination 30 includes a spout body 31 and a cap 32, which will be described later. If it is planned to attach the cap 32 in a later process, the spout body-equipped pouch equipped with the spout body 31 is included in the spout-equipped pouch 100.

[0015] In this embodiment, an example will be described in which the pouch body 10 is a self-standing type. For example, in Fig. 2, the bottom of the pouch body 10 has a gusset M formed in the bottom edge seal portion 24, making it a so-called bottom gusset bag. In this specification, the terms "bottom," "top," and "side," as well as the terms "vertical direction" and "horizontal direction," represent the positions and directions of pouch body 10 and its components based on the state in which pouch body 10 is standing on its own.

[0016] The pouch body 10 includes a body portion 1 having a filling portion S to be filled with a fluid and an open bottom end, and a bottom portion 2 attached to cover the opening of the pouch body 10. The body portion 1 includes a front portion (front sheet 11) and a rear portion (rear sheet 12) that form the filling portion S therebetween. In the following description and drawings, unless otherwise specified, the front portion 11 and the rear portion 12 that make up the body portion 1 have shapes that are symmetrical to each other. In other words, the components of the front portion 11 and the rear portion 12 are substantially identical. Therefore, in the following description, the shape of the front portion 11 will be mainly described, and a description of the shape of the rear portion 12 will be omitted.

[0017] In this embodiment, bottom surface portion 14 constitutes bottom portion 2 of pouch body 10 when pouch body 10 stands on its own.

[0018] The pouch body 10 is configured to contain a fluid liquid such as juice, nutritional drink, jelly, etc., but may also contain flowable powder or granules. In other words, the term "fluid" is a concept that broadly includes not only liquids but also a wide range of fluid substances such as numerous powders and granules.

[0019] The body portion 1 is formed by joining the front sheet 11 and the rear sheet 12 together 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.

[0020] The body 1 and the bottom 2 will be described in detail below. Fig. 3 is an exploded view of the components that make up the pouch body 10. As shown in Fig. 3, in this embodiment, the pouch body 10 is made up of three sheets: a front sheet 11, a rear sheet 12, and a bottom sheet 14. Of these, the front sheet 11 and the rear sheet 12 make up the body portion 1, and the bottom sheet 14 makes up the bottom portion 2.

[0021] 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 is formed in the portion that will become the bottom edge 44 of the pouch body 10. In this case, the body portion 1 is divided into 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-welded, and an unsealed portion where the front sheet 11 and the rear sheet 12 are not heat-welded. In this specification, the "inner surface" refers to the surface facing the fluid L to be filled into the pouch body 10. In Figure 3, the outer surface opposite the inner surface 11x of the front sheet 11 and the outer surface opposite the inner surface 12x of the rear sheet 12 are denoted by the reference symbols 11y and 12y, respectively.

[0022] As shown in Figure 1, the seal portion of the body portion 1 includes a pair of side edge seal portions 22 extending along a pair of side edges and a top edge seal portion 21 extending along the top edge. The filling portion S is defined in a space enclosed by the pair of side edge seal portions 22 and the top edge seal portion 21. The bottom edge seal portion 24 is formed by heat-sealing the inner surface 11x of the front sheet 11 and the inner surface 12x of the back sheet 12 of the body portion 1 to the inner surface 14x of the bottom sheet 14 of the bottom portion 2. The bottom edge seal portion 24 is a seal portion formed to close the opening of the body portion 1.

[0023] Next, the bottom portion 2 will be described. As shown in FIG. 3 , in this embodiment, the bottom portion 2 is attached to the body portion 1 by folding the bottom sheet 14 to form a folded portion 43, and then heat-sealing the inner surface 14x of the bottom sheet 14 to the inner surface 11x of the front sheet 11 and the inner surface 12x of the rear sheet 12 of the pouch body 10 with the folded portion 43 convex toward the inside of the pouch body 10. The portion of the bottom sheet 14 that is heat-sealed to the front sheet 11 is referred to as the first portion 41, and the portion that is heat-sealed to the rear sheet 12 is referred to as the second portion 42. The folded portion 43 is located between the first portion 41 and the second portion 42. The bottom portion 2 is configured to extend from one of a pair of side edge seal portions 22 of the body portion 1 to the other side edge seal portion 22. This configuration provides the spout-equipped pouch 100 with excellent self-supporting ability and filling suitability. In addition, Figure 3 shows an example in which the folded portion 43 is formed as a bent portion by sharply folding the bottom sheet 14, but this is not limited to this, and the folded portion 43 may be formed as a curved portion.

[0024] Next, an example of the layer structure of the front sheet 11, rear sheet 12 and bottom sheet 14 will be described. First, the layer configuration of the front sheet 11 and the back sheet 12 will be described with reference to Figures 4 and 5. As shown in Figure 4, the front sheet 11 and the back sheet 12 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 Figure 4, the paper base layer 61 forms an intermediate layer, and the thermal adhesive layers 62 form the outer surfaces 11y, 12y and inner surfaces 11x, 12x of the front sheet 11 and the back sheet 12. Note that a pattern or the like may be printed on the paper base layer 61.

[0025] 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-improving layer 66 disposed between the paper substrate layer 61 and the thermal adhesive layer 62.

[0026] Next, the materials constituting the front sheet 11 and the rear sheet 12 will be described.

[0027] The material that constitutes the paper base layer 61 is not particularly limited as long as it has rigidity, and can be appropriately selected and used depending on the contents to be filled into the pouch body 10, taking into consideration factors such as water resistance (size). As specific examples, high-quality paper, bleached kraft paper, cup base paper, milk carton base paper, etc. can be suitably used, and the basis weight thereof is 80 g / m 2 ~320g / m 2 The range is appropriate.

[0028] Materials that can be used to form the thermal adhesive layer 62 include, for example, low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), ethylene-α-olefin copolymers polymerized using a single-site catalyst, ethylene-vinyl acetate copolymers (EVA), ethylene-acrylic acid copolymers (EAA), ethylene-methacrylic acid random copolymers (EMAA), ethylene-methyl acrylate copolymers (EMA), ethylene-ethyl acrylate copolymers (EEA), ionomers, polypropylene and its copolymers, polyester resins, etc., and an appropriate material can be selected from these and used depending on the contents to be filled and the conditions of storage and use.

[0029] Among the materials that make up the thermal adhesive layer 62, low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE) are particularly excellent in thermal stability during processing such as extrusion coating, adhesion to various substrates, and low-temperature heat sealing properties, and also have excellent thin-film formability.Therefore, it is easy to extrusion coat and laminate the outermost thermal adhesive resin layer, which does not require much thickness, at a relatively thin thickness of, for example, 6 μm to 10 μm, which allows the proportion of plastic material used to be reduced and also provides cost benefits.

[0030] The thermal adhesive layer 62 can be laminated by extrusion coating a resin on top of an easy-adhesion treatment such as anchor coating, corona treatment, or flame (flame) treatment as needed, or the thermal adhesive resin can be formed into a film in advance and then laminated by bonding it together using a known dry laminate or extrusion laminate (sandwich laminate) method.

[0031] The material constituting the barrier layer 65 may be any material capable of imparting water vapor and other gas barrier properties and light blocking properties. Specific examples include metal foils such as aluminum foil, as well as vapor-deposited films of metals or inorganic oxides such as aluminum, silica, and alumina deposited to a thickness of 20 to 100 nm on substrate films such as biaxially oriented polyethylene terephthalate films (hereinafter referred to as PET films), biaxially oriented nylon films (hereinafter referred to as ON films), and biaxially oriented polypropylene films (hereinafter referred to as OPP films). Alternatively, saponified ethylene-vinyl acetate copolymer films (hereinafter referred to as EVOH films), biaxially oriented nylon MXD6 films, polyacrylonitrile films, and PET films, ON films, and OPP films with a polyvinylidene chloride coating layer can be used.

[0032] It is usually preferable to laminate the barrier layer 65 on the inner surface of the paper base layer 61, since this allows the barrier properties to be effectively utilized, but when a metal foil such as aluminum or a metal-deposited film is used for the barrier layer 65, the metallic feel can also be utilized in the design, so the barrier layer 65 can also be laminated on the outer surface of the paper base layer 61. The barrier layer 65 can be easily laminated by known methods such as dry lamination or extrusion lamination (sandwich lamination).

[0033] 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 as the material for the strength-enhancing layer 66. In this case, the puncture resistance and pinhole resistance of the pouch body 10 can be improved.

[0034] Next, the layer structure of the bottom sheet 14 will be described with reference to Figures 6 to 8. As shown in Figure 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 Figure 6, the synthetic resin film base layer 53 forms the outer surface 14y of the bottom sheet 14, and the thermal adhesive layer 52 forms the inner surface 14x of the bottom sheet 14.

[0035] 7, the bottom sheet 14 may further include a barrier layer 55 disposed between the synthetic resin film substrate layer 53 and the thermal adhesive layer 52. Also, as shown in FIG. 8, the bottom sheet 14 may further include a strength improving layer 56 between the barrier layer 55 and the thermal adhesive layer 52.

[0036] The material for forming the synthetic resin film substrate layer 53 may be any material that has heat resistance, such as a PET film, an ON film, or an OPP film.

[0037] The material for the thermal adhesive layer 52 may be the same as that for the thermal adhesive layer 62 described above.

[0038] The barrier layer 55 may be made of the same material as the barrier layer 65 described above.

[0039] The material for the thermal adhesive layer 52 may be the same as that for the thermal adhesive layer 62 described above.

[0040] The adhesive layer 54 between each layer is usually formed by dry lamination, so a dry lamination adhesive such as a two-component curing polyurethane adhesive can be used. The anchor coat is a type of primer coat that is applied in advance to the synthetic resin film substrate layer 53 to improve adhesion when laminating resin by extrusion coating.

[0041] The total thickness of the bottom sheet 14 is preferably within the range of, for example, 40 μm to 120 μm, inclusive, in which case the bottom sheet 14 has sufficient folding properties.

[0042] It goes without saying that the layer structures of the front sheet 11, the rear sheet 12, and the bottom sheet 14 are not limited to those described above.

[0043] Next, the spout main body 31 will be described. Fig. 9A is a front view, Fig. 9B is a side view, and Fig. 9C is a cross-sectional view taken along line AA in Fig. 9A. As shown in Fig. 9A, in this embodiment, the spout main body 31 mainly comprises an outer cylindrical portion 311, and is provided at the bottom with a joining base 312 that is joined to the pouch body 10. Furthermore, a clogging prevention portion 313 is provided at the bottom of the joining base 312 to prevent the liquid flow path from being clogged due to the container walls coming into close contact with each other.

[0044] The outer cylindrical portion 311 is provided with a male screw 315, which can be threaded with a female screw provided on the inside of the separate cap 32.

[0045] Furthermore, 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 spout combination 30 can be easily transported by a transport conveyor.

[0046] The joining base 312 has an inner cylindrical portion 317 which serves as a liquid passage, and its outer peripheral surface is joined to the upper edge seal portion 21 of the pouch body 10. The spout body 31 is attached to the pouch body 10 by thermal bonding to the inner surfaces 11x, 12x of the front sheet 11 and the rear sheet 12, with the joining base 312 sandwiched between them.

[0047] The clogging prevention section 313 is provided at the bottom of the inner cylindrical section 317 and is composed of a fluid guide path 318 having three to four partition walls 314 extending downward, and a connecting section 320 consisting of connecting sections 319 that connect the multiple partition walls 314 spaced circumferentially to the joining base 312 and that connects the fluid guide path 318 to the inner cylindrical section 317 inside the joining base 312 via openings between the connecting sections 319. By providing the blocking prevention portion 313, it is possible to prevent the front sheet 11 and the rear sheet 12 of the pouch body 10 from coming into close contact with each other, thereby preventing the liquid flow path from being blocked.

[0048] The material of the spout body 31 is not particularly limited as long as it can be thermally bonded to the inner surfaces 11x, 12x of the pouch body 10, and for example, polypropylene, medium-density or high-density polyethylene, polyester, etc. can be used.

[0049] The cap 32 is not limited to a screw type, but may be a stopper type.

[0050] Next, an example of a method for manufacturing the pouch 100 with a spout will be described.

[0051] First, the long front sheet 11, back 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 back sheet 12 are made to face each other. The bottom sheet 14 is also folded back so that the folded-back portions 43 are convex upward. Next, the bottom sheet 14 is inserted between the side edges of the front sheet 11 and the back sheet 12. Thereafter, the inner surface 14x of the bottom sheet 14 is heat-sealed to the inner surface 11x of the front sheet 11 and the inner surface 12x of the back sheet 12, forming the side edge seals 22 and the bottom edge seal 24 in a predetermined pattern, and forming a bag shape with an open top. Next, the joining base 312 of the spout body 31 is inserted into the opening at the upper edge of the front sheet 11 and the rear sheet 12, and the joining base 312 is sandwiched between the inner surfaces 11x, 12x of the front sheet 11 and the rear sheet 12 and attached to the pouch body 10 by thermal bonding, thereby producing the spout-equipped pouch 100. The contents are then filled through the spout body 31, and the cap 32 is attached to the spout body 31, completing the production of the spout-equipped pouch 100 package.

[0052] According to this embodiment, the base material of the front sheet 11 and the rear sheet 12 that make up the spout-equipped pouch 100 is a paper base material, and the base material of the bottom sheet 14 is a synthetic resin film base material, thereby reducing the amount of plastic used, maintaining the pouch's self-supporting ability, improving the suitability for filling the contents, and improving production yield. [Example]

[0053] Next, specific examples of the above-described embodiment will be described, but the present disclosure is not limited to the descriptions of the following examples as long as they do not depart from the gist of the disclosure.

[0054] Example 1 In producing the spout-equipped pouch 100 of this embodiment, first, a laminated sheet of a front sheet 11 and a rear sheet 12 was prepared.

[0055] First, as the paper base layer 61, a basis weight of 150 g / m 2A base paper for a liquid paper container (manufactured by Nippon Paper Industries Co., Ltd.) was prepared. Then, gravure printing was performed on a predetermined position of the paper base layer 61 to form a picture print layer.

[0056] On the other hand, a 12 μm biaxially oriented PET film (manufactured by Toyobo Co., Ltd., product name: E-5102) was prepared as the strength-improving layer 66. Then, an adhesive for dry lamination was applied to one surface of the strength-improving layer 66, and then a 7 μm-thick aluminum foil (manufactured by Toyo Aluminum Co., Ltd., product name: 1N30) was dry-laminated as the barrier layer 65.

[0057] Next, the surface of the barrier layer 65 of the laminate sheet (a laminate sheet in which a barrier layer 65 and a strength-improving layer 66 are bonded) bonded in the above process was laminated to the inner surface of the printed paper base layer 61 by extrusion lamination (sandwich lamination) with a 20 μm-thick EMAA (manufactured by Mitsui-Dow Polychemicals, product name: N0908N) interposed as a molten adhesive layer 64.

[0058] Next, a 40 μm thick LDPE (product name: LC520, manufactured by Japan Polyethylene Corporation) was formed by extrusion lamination on the opposite side (inner side) of the strength-improving layer 66 from the paper base layer 61 as the innermost thermal adhesive layer 62. Next, a 20 μm thick LDPE (product name: LC520, manufactured by Japan Polyethylene Corporation) was formed by extrusion lamination on the printed surface of the paper base layer 61 as the outermost thermal adhesive layer 62.

[0059] As a result, a laminated sheet of a front sheet 11 and a rear sheet 12 having the following layer structure was produced.

[0060] (Outer surface) LDPE (20 μm) / patterned layer / paper base layer (150 g / m 2 ) / EMAA (20 μm) / aluminum foil (7 μm) / PET film (12 μm) / LDPE (40 μm) (inner surface)

[0061] Next, a laminated sheet for the bottom sheet 14 was prepared.

[0062] First, a 15 μm thick ON film (Toyobo Co., Ltd., product name: N-5342) was prepared as the synthetic resin film substrate layer 53. Next, lamination was performed using a dry lamination method with a dry lamination adhesive, and then a 60 μm thick LDPE film was laminated. As a result, a bottom sheet 14 having the following layer configuration was produced.

[0063] (Outer surface) ON film (15 μm) / adhesive layer / LDPE (60 μm)

[0064] The inner surface 11x of the front sheet 11 obtained above and the inner surface 12x of the back sheet 12 were arranged to face each other. The bottom sheet 14 obtained above was folded over in advance so that the inner surface 14x was on the outside. Next, the bottom sheet 14 was inserted between both side edges of the front sheet 11 and the back sheet 12, and then heat-sealed from the outer surface side using a hot plate heat seal bar to form side edge seal portions 22 and bottom edge seal portion 24 in a predetermined pattern, thereby producing a bag-shaped pouch body 10 with an opening at the top.

[0065] Next, the joining base 312 of the spout body 31 was inserted into the opening at the upper edge of the front sheet 11 and the rear sheet 12, and the joining base 312 was sandwiched between the inner surfaces 11x, 12x of the front sheet 11 and the rear sheet 12, and attached to the pouch body 10 by thermal bonding using a heat seal bar set to an appropriate temperature for heat sealing, thereby producing a pouch with a spout 100.

[0066] Next, a filling nozzle for filling liquid contents was pressed against the opening at the top of the outer cylindrical portion 311 of the spout body 31, and a sports drink (200 ml) was filled as the contents. Thereafter, the cap 32 was attached to the top of the spout body 31. As a result, a package of the spout-equipped pouch 100 filled with the sports drink of this example was completed.

[0067] Example 2 First, a laminated sheet for the bottom sheet 14 was prepared. First, a 12 μm biaxially oriented PET film (manufactured by Toyobo Co., Ltd., product name: E-5102) was prepared as the synthetic resin film substrate layer 53. Then, a dry lamination adhesive was applied to one side of the synthetic resin film substrate layer 53, and then a 7 μm thick aluminum foil (manufactured by Toyo Aluminum Co., Ltd., product name: 1N30) was dry laminated to form the barrier layer 55. Next, a 40 μm thick LDPE (manufactured by Japan Polyethylene Co., Ltd., product name: LC520) was formed on the surface of the barrier layer 55 by extrusion lamination as the innermost thermal adhesive layer 52. As a result, a bottom sheet 14 having the following layer configuration was produced.

[0068] (Outer surface) PET film (12 μm) / adhesive layer / AL (7 μm) / adhesive layer / LDPE (40 μm)

[0069] A pouch 100 with a spout was produced in the same manner as in Example 1, except for the bottom sheet 14. Thereafter, a package of the pouch 100 with a spout was completed in the same manner as in Example 1.

[0070] Example 3 First, a laminated sheet for the bottom sheet 14 was prepared. First, a 12 μm biaxially oriented PET film (manufactured by Toyobo Co., Ltd., product name: E-5102) was prepared as the synthetic resin film substrate layer 53. Then, a dry laminating adhesive was applied to one side of the synthetic resin film substrate layer 53, and then a 7 μm thick aluminum foil (manufactured by Toyo Aluminum Co., Ltd., product name: 1N30) was dry laminated as the barrier layer 55. Next, the surface of the barrier layer 55 was laminated using a dry laminating method with the dry laminating adhesive interposed therebetween. After that, a 15 μm thick ON film (manufactured by Toyobo Co., Ltd., product name: N-5342) was laminated as the strength-improving layer 56, 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 configuration was produced.

[0071] (Outer surface) PET film (12 μm) / adhesive layer / AL (7 μm) / adhesive layer / ON film (15 μm) / adhesive layer / LDPE (40 μm)

[0072] A pouch 100 with a spout was produced in the same manner as in Example 1, except for the bottom sheet 14. Thereafter, a package of the pouch 100 with a spout was completed in the same manner as in Example 1.

[0073] The packaging body of the spout-equipped pouch 100 in Examples 1 to 3 is constructed using a bottom sheet 14 made of a soft packaging material separate from the front sheet 11 and rear sheet 12, which makes it easier for the folded bottom of the pouch body 10 to expand, maintaining the self-supporting ability of the spout-equipped pouch 100 and ensuring a stable filling amount when filling the contents, resulting in excellent suitability for filling the contents and enabling a reduction in the amount of plastic used. [Explanation of symbols]

[0074] 1. Torso 2 bottom 10 Pouch body 11 Front section (front seat) 12 Rear section (rear sheet) 11x, 12x, 14x inner surface 11y, 12y, 14y external surface 14 Bottom part (bottom sheet) 20 Seal part 21 Upper edge seal 22 Side edge seal 24 Bottom edge seal 30 Spout assembly 31 Spout body 311 outer cylindrical part 312 Joint base 313 Blockage prevention part 314 Partition Wall 315 Male screw 316 Flange part 317 Inner cylindrical part 318 Fluid guideway 319 Connection section 320 Liaison Department 32 Cap 41 Part 1 42 Part 2 43 Folded part 44 Bottom edge 61 Paper base layer 52, 62 Thermal adhesive layer 53 Synthetic resin film base layer 54, 64 Adhesive layer 55, 65 Barrier layer 56, 66 Strength-enhancing layer 100 pouches with spouts (with caps)

Claims

1. a pouch body having a front surface, a rear surface, and a bottom surface; A spout-equipped pouch comprising: a spout body joined to an upper edge portion of the pouch body; A flange portion is provided between the outer cylindrical portion of the spout body and the joint base portion, A clogging prevention part is provided at the lower part of the joint base part of the spout body, The front surface portion and the rear surface portion are made of a laminated sheet including, from at least the outer side, a paper base layer and a thermal adhesive layer, The bottom portion has a folded portion facing the pouch body, and is made of a laminated sheet including, from at least the outside, a synthetic resin film base layer and a thermal adhesive layer (but not a paper base layer).

2. The spout-equipped pouch according to claim 1 , wherein an anti-clogging part is provided at a lower part of the joint base part of the spout body.

3. 3. The spout-equipped pouch according to claim 2, wherein the clogging prevention part is located at the center of the pouch body in the vertical direction.

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