Composite Containers

Abstract

To provide a composite container that has a sense of high quality and can be separated into paper and plastic when disposed of.SOLUTION: A composite container includes: a paper-made outer container; and an inner container with a laminated body containing plastic film. The inner container is covered with the outer container. The outer container includes: a cylindrical, first trunk part; a bottom part that is the lower opening end of the first trunk part closed with a bottom member; a first ramp that continues to the upper opening end of the first trunk part and tapers upward; and a first neck part whose upper end continuing to the first ramp is open. The inner container includes a pouch body and a pouring tool. The pouch body includes: a heat-sealing part around the circumference thereof; a second trunk part; a second ramp that continues to the second trunk part and tapers upward; and a second neck part that continues to the second ramp and extends upward. The second neck part has the pouring tool seal-heated thereto, and the inner container being covered with the outer container, the outer container being disassembled.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a composite container for storing liquid contents, etc., which comprises an outer container made of paper and an inner container having a laminate including a plastic film, the inner container being covered by the outer container. [Background technology]

[0002] 2. Description of the Related Art Conventionally, Gabeltop and flattop paper liquid containers made from a laminate mainly made of cardboard laminated with a plastic film have been widely known as containers for storing liquid contents such as alcoholic beverages such as sake, shochu, and wine, as well as juice, fruit juice drinks, coffee, tea, and dairy drinks.

[0003] These paper containers for liquids are excellent containers that can maintain the shape of a rectangular column because they are mainly made of cardboard, have good loading efficiency, and are lightweight, which allows for streamlining of logistics, and are widely used as alternatives to bottles and cans. However, in recent years, an increase in waste has become a major social issue, and when used containers are disposed of, there is a demand for reducing the volume of the containers and for separating the paper and plastic parts when disposing of them. As a paper container for liquids that allows for the former type of container to be reduced in volume, a paper container for liquids is known that is composed of a laminate in which a thermoplastic resin layer, a paper base material, a barrier layer, and a sealant layer are laminated in this order, and that the base material of the paper base material and the barrier layer is scratched, which serves as a trigger for dismantling the container (see, for example, Patent Document 1). As a paper container for liquids that allows for the latter type of container to be disposed of separately for paper and plastic, a paper container for liquids is known that is composed of a laminate in which an outer part mainly made of a paper layer and an inner part mainly made of a plastic film are laminated via a peeling layer, and that is configured so that the outer part and the inner part can be separated from each other by the peeling layer (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-193416 A [Patent Document 2] JP 2000-85756 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the paper container for liquid in Patent Document 1, the laminated body must be repeatedly folded at the scratched parts in order to dismantle it, while in the paper container for liquid in Patent Document 2, an opening must be created to peel the outer part from the inner part. In both Patent Documents 1 and 2, the dismantling work is time-consuming and tedious.

[0006] Furthermore, conventional paper containers for liquids are predominantly rectangular in shape, and this shape is so well-recognized that it can be immediately identified as a product containing liquid contents. However, the market is demanding the development of new shapes, such as bottle-shaped paper containers for liquids that have a more luxurious feel.

[0007] The present invention has been made to solve the above problems, and its object is to provide a composite container that has a luxurious feel and can be easily separated into paper and plastic at the time of disposal. [Means for solving the problem]

[0008] The present invention has been made to achieve the above-mentioned object. The present invention described in claim 1 is a composite container comprising an outer container made of paper and an inner container comprising a laminate including a plastic film, the inner container being covered by the outer container, the outer container comprising a cylindrical first body, a bottom portion in which a lower opening of the first body is closed by a bottom member, a first inclined portion connected to an upper opening of the first body and tapering toward the top, and a first neck portion connected to the first inclined portion and having an open upper end, the inner container comprising a pouch body and a pouring tool, the pouch body comprising a thermally sealed portion on its periphery, a second body portion, a second inclined portion connected to the second body portion and tapering toward the top, and a second neck portion connected to the second inclined portion and extending upward, the pouring tool being thermally sealed to the second neck portion, the inner container being covered by the outer container, and the outer container being dismantled.

[0009] The present invention described in claim 2 is characterized in that, in the composite container described in claim 1, it is provided with a band seal that is wrapped around the first neck portion of the outer container or a position that straddles the first neck portion of the outer container and the second neck portion of the inner container to which the pouring tool is thermally bonded. Effect of the Invention

[0010] The composite container of the present invention has a luxurious feel and can be easily disposed of by separating the paper and plastic components. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view showing one embodiment of a composite container according to the present invention. [Diagram 2] 2 is a development view showing a blank for an outer container for assembling the composite container of FIG. 1. FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] 1A and 1B are a perspective view and a cross-sectional view showing an example of a spout for an inner container. [Figure 6] FIG. 2 is a cross-sectional view showing an example of the structure of a laminate of an inner container. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The present invention will be described in detail below with reference to the drawings.

[0013] FIG. 1 is a perspective view showing one embodiment of a composite container according to the present invention, FIG. 2 is a development view showing a blank of an outer container for assembling the composite container of FIG. 1, FIG. 3 is an explanatory diagram of assembling the outer container, FIG. 4 is a perspective view showing an inner container, FIG. 5 is a perspective view and a sectional view showing an example of a pouring tool of the inner container, and FIG. 6 is a sectional view showing an example of the configuration of a laminate of inner containers, in which 100 is the composite container, 1 is the outer container, 11 is a first body portion, 12 is a first inclined portion, 13 is a first neck portion, 14 is a bottom portion, 2 is a blank, 21 is a first body portion forming plate, 21a is a body portion joint, The numerals indicate a first inclined portion forming plate, a second inclined portion forming plate, a first neck portion forming plate, a neck adhesive piece, a bottom adhesive piece, a bottom member, a bottom member, a container, a pouch body, a second body portion, a second inclined portion, a second neck portion, a side heat-sealed portion, a bottom heat-sealed portion, a top heat-sealed portion, a spouting tool, a spouting tube, a flange portion, a pouch joint, a pouch bonding portion, a cap, a laminate, a pouch bonding portion ...

[0014] FIG. 1 is a perspective view showing one embodiment of a composite container according to the present invention, and a composite container 100 is a composite container in which an inner container 3 is covered with an outer container 1 as shown in FIG.

[0015] FIG. 2 is an exploded view showing a blank of an outer container 1 for assembling the composite container 100 of one embodiment of FIG. 1, and FIG. 4 is an oblique view showing the inner container 3. The composite container 100 of one embodiment is composed of an outer container 1 made of paper and an inner container 3 having a laminate 50 including a plastic film.

[0016] The blank 2 shown in FIG. 2 is formed by punching out a paperboard into a predetermined shape. FIG. 2(A) shows a member forming the tubular portion, and FIG. 2(B) shows a member forming the bottom portion. FIG. 2(A) shows an example in which a tubular portion is formed from two blanks 2. The two blanks 2 have the same shape and size. The blank 2 has four trapezoidal first inclined portion forming plates 22, the lower base of which is longer than the upper base, formed on the upper side of a rectangular first body forming plate 21 via a fold line a, and the lower bases of adjacent first inclined portion forming plates 22 are closely spaced on the fold line. Note that the "closely spaced" may be in contact with the lower bases, or may have a small gap therebetween, and refers to a state in which the gap between the oblique sides of adjacent first inclined portion forming plates 22 is not noticeable when the first inclined portion 12 (see FIG. 1) is formed, as will be described later.

[0017] A rectangular first neck forming plate 23 is connected to the upper edge of the first inclined portion forming plate 22 via a fold line c, and a tongue-shaped neck adhesive piece 23a extends from the right edge of the first neck forming plate 23.

[0018] A band-shaped body adhesive piece 21a extends from the right edge of the first body forming plate 21. One body adhesive piece 21a is adhered to the left edge of the first body forming plate 21 of the other blank 2 of the two blanks 2, and the other body adhesive piece 21a is adhered to the left edge of one blank 2, for forming the cylindrical first body 11 (see FIG. 1). A plurality of tongue-shaped bottom adhesive pieces 24 extend from the bottom edge of the first body forming plate 21 via fold line b.

[0019] Figure 2 (b) shows a circular bottom member 25 made of paperboard, which is adhered to a bottom adhesive piece 24 extended from a first body forming plate 21 to form a cylindrical first body 11, and the bottom 14 is formed by closing the lower opening of the cylindrical first body 11.

[0020] Next, an example of a method of assembling the outer container 1 from the blank 2 and the bottom member 25 shown in FIG. 2 will be described with reference to FIG. 2 and FIG. 3. FIG. 3 shows the outer container 1 in the middle of assembly. The outer surface of the body adhesive piece 21a of one blank 2 is overlapped with the inner surface of the left end of the first body forming plate 21 of the other blank 2 and bonded together with an adhesive or the like. Then, the one blank 2 and the other blank 2 bonded together and integrated are rolled up, and the inner surface of the left end of the first body forming plate 21 of one blank 2 is overlapped with the outer surface of the body adhesive piece 21a of the other blank 2 and envelope-pasted with an adhesive or the like to form a cylindrical first body 11. Then, the bottom adhesive piece 24 is folded inward at the folding line b and bonded to the inner surface of the bottom member 25 with an adhesive or the like to close the lower opening of the first body 11, thereby forming the bottom 14. FIG. 3(a) shows this state.

[0021] Next, the first inclined portion forming plate 22 is folded inward at the fold line a, and the first neck portion forming plate 23 is folded outward at the fold line c. Similarly, each of the first inclined portion forming plates 22 and the first neck portion forming plate 23 is folded, so-called crimped. The first inclined portion forming plate 22 and the first neck portion forming plate 23 adjacent to the crimped first inclined portion forming plate 22 and the first neck portion forming plate 23 are laminated by overlapping the outer surface of the neck adhesive piece 23a and the inner surface of the left end of the adjacent first neck portion forming plate 23. By performing the same operations in sequence, the first inclined portion 12 and the first neck portion 13 are formed, and the outer container 1 shown in FIG. 3(B) is completed. It is preferable that the angle of the oblique side of the first inclined portion forming plate 22 is set so that the gap between the first inclined portion 12 and the adjacent first inclined portion forming plate 22 is not noticeable when the first inclined portion 12 is formed.

[0022] In one embodiment, a bottle-shaped outer container 1 is shown in which the first inclined portion 12 is formed by eight first inclined portion forming plates 22, but this is not limited to this, and it is preferable that there are 5 to 10 first inclined portion forming plates 22, and more preferably 6 to 8 first inclined portion forming plates 22.

[0023] The blank 2 and the bottom member 25 may be made of coated cardboard, uncoated cardboard, kraft cardboard, manila cardboard, or the like, and may have a thickness of 100 g / m 2 ~400g / m 2The paperboard may have a surface coating to provide water resistance. The outer surface of the paperboard may be printed with a design or the like, which may provide the composite container 100 with a more luxurious feel. The adhesive used for bonding is preferably an emulsion type or hot melt type.

[0024] As shown in Fig. 4, the inner container 3 includes a pouch body 30 for storing contents (not shown) and a pouring tool 40 for pouring out the contents. The pouch body 30 includes heat-sealed parts on its periphery, namely, a side heat-sealed part 34, a side heat-sealed part 35, a bottom heat-sealed part 36, and an upper heat-sealed part 37, the side heat-sealed part 34 and the side heat-sealed part 35 being arranged opposite each other on the left and right, the bottom heat-sealed part 36 and the upper heat-sealed part 37 being arranged opposite each other on the top and bottom, the upper and lower ends of the side heat-sealed part 34 and the side heat-sealed part 35 being connected to both ends of the bottom heat-sealed part 36 and the upper heat-sealed part 37, respectively, and the space surrounded by these heat-sealed parts on its periphery forms a storage part for storing the contents. The opposing side heat-sealed parts 34, 35 are formed symmetrically, with a straight portion extending upward to form the second body 31, an inclined portion extending upward to form the second inclined part 32, and a straight portion extending upward to form the second neck 33. That is, as shown in Fig. 4, the pouch body 30 has the second body 31, the second inclined part 32 connected to the second body 31 and tapering upward, and the second neck 33 connected to the second inclined part 32 and extending upward, and the spout 40 is heat-sealed to the second neck 33.

[0025] FIG. 5 shows an example of the spout 40 of the inner container 3, (A) is a perspective view, and (B) is a cross-sectional view taken along line AA. As shown in FIG. 5, the spout 40 is composed of a spout body having a spout tube 41, flanges 42 and 43, and a pouch joint 44, and a cap 45 that closes the spout outlet of the spout tube 41. The spout body is a hollow, approximately cylindrical spout tube 41, two flanges 42 and 43, and a pouch joint 44 that are connected in sequence, and the flanges 42 and 43 and the pouch joint 44 form an approximately cylindrical flow path in the center that communicates with the spout tube 41, allowing the contents to be poured out. A screw portion is provided on the outer surface of the spout tube 41. The two flanges 42 and 43 provided between the spout tube 41 and the pouch joint 44 are preferable for mechanically transporting the spout tube 40 in a hanging state during the work of attaching the spout tube 40 to the pouch body 30. The pouch joint 44 is spindle-shaped, which is preferable because it can reliably seal when the pouch joint 44 is inserted into the pouch body 30 and heat-sealed at the upper heat-sealing portion 37 .

[0026] The cap 45 has a top portion and an outer peripheral wall that hangs down from the periphery of the top portion. The outer surface of the outer peripheral wall is provided with a number of grooves extending from the top to the bottom, which are preferable because they act as a slip-proofing when the cap 45 is held with fingers and turned around. In addition, a screw portion is provided on the inner surface of the outer peripheral wall of the cap 45, which can be screwed into a screw portion provided on the outer surface of the pouring tube 41. The cap 45 of the pouring tool 40, and the pouring part body consisting of the pouring tube 41, the flange portions 42 and 43, and the pouch joint portion 44 are each formed as a molded product by an injection molding method in which a resin is injected into a molding die. Examples of resins used for the cap 45 include low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (linear) low-density polyethylene, polypropylene, ethylene-propylene copolymer, and acrylonitrile-butadiene-styrene copolymer (ABS). The resin used for the pouring part body is a resin that can be thermally fused to the resin of inner layer 53 (see Figure 6) of laminate 50 constituting pouch body 30 described below by heat sealing, and examples of such resin include low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-propylene copolymer, and acrylonitrile-butadiene-styrene copolymer (ABS).

[0027] The pouch body 30 is made of a laminate 50 having an outer layer 51, an intermediate layer 52, and an inner layer 53 made of a heat-sealable resin layer on the inner surface as shown in Fig. 6. For example, as shown in Fig. 4, the overlapping periphery is heat-sealed at the side heat-sealed parts 34, 35 and the bottom heat-sealed part 36 so that the inner layers 53 of two sheets of the laminate 50 face each other, to form the pouch body 30 with an opening at the top facing the bottom heat-sealed part 36. The pouring tool 40 is inserted into the opening at the top, and the pouch joint part 44 of the pouring tool 40 is sandwiched between the sheets of the laminate 50 and heat-sealed to form the upper heat-sealed part 37 and the pouring tool 40 is attached. The contents are filled into the pouch body 30 from the pouring tube 41 of the pouring tool 40, and the cap 45 is attached to the pouring tube 41 to seal it, thereby forming the inner container 3 shown in Fig. 4. The mouth of the pouring tube 41 may be hermetically sealed with a film and then sealed with the cap 45. The spout 40 may be attached to the pouch body 30 in advance in a separate process, or an automatic filling machine may be used to attach the spout 40 to the pouch body 30, fill the contents through the spout of the spout tube 41, and seal the spout tube 41 with a cap 45 in-line. In FIG. 4, a modified four-sided sealed pouch is shown as the pouch body 30, but the pouch body 30 is not limited to this, and may be a gusset pouch, a self-supporting pouch, a three-sided sealed pouch, or the like. As shown in FIG. 4, the pouch body 30 of the inner container 3 has a second body 31, a second inclined portion 32 connected to the second body 31 and tapering toward the spout 40, and a second neck portion 33 connected to the second inclined portion 32 and extending toward the spout 40.

[0028] Fig. 6 is a cross-sectional view showing an example of the laminated structure of the laminate 50 constituting the pouch body 30 of the inner container 3. As shown in Fig. 6, the laminate 50 of the pouch body 30 can be laminated by, for example, a dry lamination method in which an outer layer 51, an intermediate layer 52, and an inner layer 53 are laminated using a dry lamination adhesive such as a urethane-based adhesive, or an extrusion lamination method in which a polyolefin-based resin or the like is hot-melt extruded and laminated. Since the outer layer 51 is the basic material constituting the pouch body 30, a synthetic resin film having excellent mechanical, physical, and chemical properties can be used, and a biaxially stretched film such as polypropylene, polyethylene terephthalate, or nylon can be used. Alternatively, a film having a vapor deposition layer formed by vapor-depositing aluminum or an inorganic material such as aluminum oxide, silicon oxide, indium oxide, tin oxide, or zirconium oxide on the above film can be used. The thickness of the film constituting the outer layer should be the minimum necessary to maintain the strength, rigidity, etc. of the basic material, and can be determined taking into consideration costs, etc., but is usually about 9 to 50 μm.

[0029] The intermediate layer 52 is provided when light-shielding or gas-barrier properties are required depending on the contents, and may be made of the film used for the outer layer 51, the film provided with the vapor deposition layer, or a metal foil such as aluminum or iron. Alternatively, one or more of these films may be combined and laminated.

[0030] The inner layer 53 is made of a heat-sealable resin, and an unstretched film of low-density polyethylene (LDPE), medium-density polyethylene (MDPE), linear low-density polyethylene (LLDPE), ethylene-vinyl acetate copolymer (EVA), ionomer, ethylene-acrylic acid copolymer (EAA), ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, or the like is used. In particular, when alcoholic beverages are used as the contents, it is necessary to suppress the influence on the taste of the contents, so a non-adsorptive cyclic polyolefin is preferred, and a multilayer of cyclic polyolefin and linear low-density polyethylene that provides high interlayer adhesion is more preferred. The thickness of the inner layer 53 is determined taking into consideration the content amount, transportation conditions, economic efficiency, etc., but is usually 20 μm to 150 μm.

[0031] The composite container 100 is manufactured by setting up the inner container 3 and the outer container 1. For example, an intermediate body in which the first inclined portion 12 and the first neck portion 13 are incomplete as shown in FIG. 3(A) assembled with two blanks 2 and a bottom member 25 is inserted into the inner container 3, which is filled with the contents and swells into a bottle shape, from the bottom heat-sealed portion 36 at the bottom to the side of the opening surrounded by eight first neck-forming plates 23, and the bottom heat-sealed portion 36 of the inner container 3 is abutted against the bottom member 25 of the intermediate body of the outer container 1. It is preferable that the intermediate body of the outer container 1 is subjected to a so-called crimping, in which the first inclined portion forming plate 22 is mountain-folded and folded inward at the fold line a, and the first neck-forming plate 23 is valley-folded outward at the fold line c. Even in the crimped state, the first inclined portion forming plate 22 and the first neck-forming plate 23 try to return to their original state due to the rigidity of the paperboard, so that the operation of inserting the inner container 3 is not hindered.

[0032] Next, the first inclined portion forming plate 22 and the first neck forming plate 23 adjacent to the first inclined portion forming plate 22 and the first neck forming plate 23 that have been folded are laminated so that the outer surface of the neck adhesive piece 23a and the inner surface of the left end of the adjacent first neck forming plate are overlapped and bonded together. By sequentially performing the same operation, the first inclined portion 12 is formed, the inner container 3 is covered with the outer container 1, and the first neck 13 of the outer container 1 is fitted to the second neck 33 of the inner container 3. The inner container 3 is flexible because it is made of a laminate 50 including a plastic film, and when the contents are filled, it becomes curved and three-dimensionally expanded, making it easy to fit the inner surface of the outer container 1, and since the outer container 1 has rigidity, the inner container 3 is held by the outer container 1. Therefore, the shape of the inner container 3 is regulated by the shape of the outer container 1, and the composite container 100 has the appearance shown in FIG. 1.

[0033] 1, a band seal 6 is provided around the first neck 13 of the outer container 1 or across the second neck 33 where the first neck 13 of the outer container 1 and the spout 40 of the inner container 3 are thermally bonded. The band seal 6 is preferable because it can fix the outer container 1 and the inner container 3. The band seal 6 can be an adhesive tape or the like.

[0034] When a user pours out the contents (not shown) from the pouring tool 40 and finishes using the composite container 100, first, the band seal 6 of the composite container 100 is removed. Then, since the first inclined portion forming plates 22 forming the first inclined portion 12 are not bonded, one of the first inclined portion forming plates 22 is picked up and the first neck forming plate 23 forming the first neck 13 is torn off, and the first neck 13 is released from the second neck 33. The outer container 1 and the inner container 3 are separated, and the paper outer container 1 and the plastic inner container 3 can be separated and disposed of.

[0035] Thus, the composite container 100 of the present invention has a bottle shape, has a luxurious feel, and the outer container 1 can be easily disassembled when discarded, and can be disposed of by separating the paper and plastic components. Note that the embodiments described so far are representative embodiments of the composite container of the present invention, and the composite container of the present invention is not limited to these, and also includes those within the scope of the present invention that do not deviate from the spirit of the present invention. [Explanation of symbols]

[0036] 100 Composite container 1 Outer container 11 First body 12 1st slope 13 1st neck 14 Bottom 2 Blank 21 First body forming plate 21a Body adhesive strip 22 First slope forming plate 23 1st neck forming plate 23a Neck adhesive piece 24 Bottom adhesive piece 25 Bottom member 3 Inner container 30 Pouch body 31 Second body 32 2nd slope part 33 Second neck 34, 35 Side heat seal 36 Bottom thermal adhesive part 37 Upper thermal bonding part 40 Pour tool 41 Pour tube 42, 43 Flange section 44 Pouch Joint 45 Cap 50 Laminate 51 Outer layer 52 Middle Class 53 Inner layer 6 Strip Sticker a, b, c fold lines

Claims

1. A composite container comprising an outer container made of paper and an inner container having a laminate including a plastic film, the inner container being covered with the outer container, The outer container has a cylindrical first body, a bottom portion formed by closing a lower opening of the first body with a bottom member, a first inclined portion connected to an upper opening of the first body portion and tapering upward; and a first neck portion connected to the first inclined portion and having an open upper end, The first inclined portion is formed by a plurality of first inclined portion forming plates, The adjacent first inclined portion forming plates are not bonded to each other, The inner container comprises a pouch body and a spout, The pouch body has a thermally bonded portion on a periphery thereof, a second body portion, a second inclined portion connected to the second body portion and tapering upward, and a second neck portion connected to the second inclined portion and extending upward, and the spouting tool is thermally bonded to the second neck portion, The pouch body is composed of a laminate having at least an outer layer and an inner layer, the inner layer comprises a non-adsorbing cyclic polyolefin; The inner container is covered with the outer container, A composite container, characterized in that the outer container is dismantled.

2. The composite container according to claim 1, characterized in that it is provided with a band seal that is circumferentially disposed at a position spanning the first neck portion of the outer container or the first neck portion of the outer container and the second neck portion of the inner container to which the pouring tool is thermally bonded.

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