Composite containers

Abstract

To provide a composite container in which paper and resin can be easily separated.SOLUTION: A composite container 1 of the invention comprises an inner container 10 having a pouch body 11 formed of a resin film and a dispensing tool 12 thermally bonded to the pouch body 11, and an outer container 20 covering the inner container 10, wherein the outer container 20 has a cylindrical paper body 22 made of paper and a cylindrical resin-molded neck part 30 detachably attached to the upper end of the body part 22, and the neck part 30 is formed by a plurality of dividable dividing members 31, 32 arranged across the spout 12.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a composite container in which an inner container made of a resin film is covered with an outer container made of paper. [Background technology]

[0002] Conventionally, paper containers for liquids, such as those with a Goebel top or flat top, have been widely known as containers for storing liquid contents such as alcoholic beverages (sake, shochu, wine, etc.), juice, fruit juice drinks, coffee, tea, and dairy drinks. These paper containers for liquids are formed using a laminate consisting primarily of cardboard laminated with a resin film. Paper containers for liquids, which are primarily made of cardboard, can maintain a rectangular shape, resulting in good loading efficiency and light weight. This allows for streamlining of logistics, and paper containers for liquids are widely used as alternatives to bottles and cans.

[0003] In recent years, the increase in waste has become a major social problem, and there is a demand for separating paper and plastic containers when disposing of used containers. Patent Document 1 discloses a paper container for liquids that allows for the paper and plastic to be separated for disposal. This paper container for liquids is formed from a laminate in which an outer portion mainly made of a paper layer and an inner portion mainly made of a resin film are laminated together via a release layer. The outer surface of the paper layer and the inner surface of the resin film can be separated by the release layer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-85756 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the conventional paper container for liquid described above, it is necessary to create an opening for separating the outer portion from the inner portion, which poses the problem of making the disassembly process time-consuming and labor-intensive.

[0006] An object of the present invention is to provide a composite container in which paper and plastic can be easily separated. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides a composite container comprising an inner container having a pouch body formed from a resin film and a pouring tool heat-bonded to the pouch body, and an outer container covering the inner container, characterized in that the outer container has a cylindrical paper body and a cylindrical resin-molded neck that is detachably attached to the upper end of the body, and the neck is formed from a plurality of separable divided members arranged on either side of the pouring tool.

[0008] Furthermore, the present invention is characterized in that in the composite container having the above-described configuration, a protrusion protruding from the inner peripheral surface is provided at the upper end of the body portion, and a groove portion into which the protrusion fits is provided at the lower end of the outer peripheral surface of the neck portion.

[0009] Furthermore, in the composite container of the present invention having the above-mentioned structure, the neck portion has a locking portion that locks the spout and prevents the inner container from rotating.

[0010] Furthermore, in the composite container of the present invention having the above-mentioned structure, the outer container has a paper bottom portion that closes the lower surface of the body portion.

[0011] Furthermore, the present invention is characterized in that in the composite container having the above-mentioned structure, the neck portion is formed from a resin containing 51% by weight or more of paper.

[0012] Furthermore, the present invention is characterized in that in the composite container having the above-mentioned configuration, the neck portion is formed from a biomass-derived resin.

[0013] Furthermore, in the composite container of the present invention having the above-mentioned structure, the neck portion is formed from a resin containing 51% by weight or more of inorganic powder. [Effects of the Invention]

[0014] According to the present invention, the detachable neck is formed on the paper body so that it can be easily separated into the inner container, neck, and body. This allows the composite container to be easily separated into paper and plastic for disposal. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view showing a composite container according to a first embodiment of the present invention. [Figure 2] FIG. 1 is a perspective view showing an inner container of a composite container according to a first embodiment of the present invention. [Figure 3] FIG. 1 is a perspective view showing a spout of a composite container according to a first embodiment of the present invention; [Figure 4] FIG. 1 is a schematic cross-sectional view showing the layer structure of a laminate that forms the inner container of a composite container according to a first embodiment of the present invention. [Figure 5] FIG. 1 is a longitudinal cross-sectional view showing the body of an outer container of a composite container according to a first embodiment of the present invention. [Figure 6] FIG. 1 is a front view showing a neck portion of an outer container of a composite container according to a first embodiment of the present invention. [Figure 7] FIG. 1 is a top view showing the neck portion of the outer container of the composite container according to the first embodiment of the present invention. [Figure 8] FIG. 1 is a front view showing a separate member of a neck portion of an outer container of a composite container according to a first embodiment of the present invention. [Figure 9] FIG. 10 is a top view showing the neck portion of the outer container of the composite container according to the second embodiment of the present invention. [Figure 10] FIG. 10 is a perspective view showing a composite container according to a third embodiment of the present invention. [Figure 11] FIG. 10 is a longitudinal cross-sectional view showing the body of the outer container of the composite container according to the third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] First Embodiment Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 shows a perspective view of a composite container of a first embodiment. The composite container 1 comprises an inner container 10 (see Fig. 2) having a spout 12, and an outer container 20 that covers the inner container 10. The outer container 20 comprises a body 22 and a neck 30.

[0017] Figure 2 shows a perspective view of the inner container 10. The inner container 10 comprises a pouch body 11 for storing the contents and a spout 12 for dispensing the contents. The pouch body 11 is sealed by heat-sealing the periphery with a heat-sealed portion 11a. The spout 12 is heat-sealed to the upper end of the pouch body 11.

[0018] Figure 3 shows a perspective view of the dispensing tool 12. The dispensing tool 12 has a cap 13 and a dispensing tube 14, which are resin-molded products formed by injection molding. The dispensing tube 14 is formed in a cylindrical shape with a dispensing outlet (not shown) at the upper end. A male thread (not shown) is formed on the outer peripheral surface of the upper end of the dispensing tube 14, and a female thread (not shown) is formed on the inner peripheral surface of the cap 13. The dispensing outlet is closed by screwing the cap 13 onto the upper end of the dispensing tube 14. The outer peripheral surface of the cap 13 is provided with a number of grooves extending vertically to prevent fingers from slipping when the cap 13 is held.

[0019] The dispensing tube 14 has a flange portion 16 extending in the radial direction. A rotation prevention portion 15 having two parallel flat surfaces is provided above the flange portion 16. An upper wall 15a of the rotation prevention portion 15 expands in the radial direction to form a seat surface for the cap 13. The rotation prevention portion 15 is engaged with an engaging portion 35a (see FIG. 7), which will be described later. A pouch joint portion 17, which is thermally bonded to the pouch main body 11, is provided below the flange portion 16. The pouch joint portion 17 is formed in a spindle shape when viewed from above, and can reliably seal when thermally bonded to the pouch main body 11.

[0020] Examples of resins that can be used to form the cap 13 include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), polypropylene (PP), ethylene-propylene copolymer (PPCO), and acrylonitrile-butadiene-styrene copolymer (ABS).

[0021] The dispensing tube 14 is made of a resin that can be heat-sealed to the inner layer 8 (see FIG. 4) of the laminate 5 that forms the pouch body 11. Examples of resins that can be used to form the dispensing tube 14 include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), polypropylene (PP), ethylene-propylene copolymer (PPCO), and acrylonitrile-butadiene-styrene copolymer (ABS).

[0022] 4 is a schematic cross-sectional view showing the layer structure of the resin film laminate 5 that forms the pouch body 11. The laminate 5 is formed by laminating an outer layer 6, an intermediate layer 7, and an inner layer 8, in that order from the outer surface side. The outer layer 6 is the basic material that forms the pouch body 11, and therefore a resin film that has excellent mechanical, physical, chemical, and other properties is used. For example, a biaxially oriented film such as polypropylene, polyethylene terephthalate, or nylon can be used as the outer layer 6. A plurality of these resin films may be laminated.

[0023] Furthermore, the outer layer 6 may be formed by providing a vapor-deposited layer on each of the above resin films, in which a metal (aluminum, etc.) or an inorganic substance (aluminum oxide, silicon oxide, indium oxide, tin oxide, zirconium oxide, etc.) is vapor-deposited. The thickness of the resin film constituting the outer layer 6 may be any thickness that maintains the minimum necessary strength, rigidity, etc. of the basic material, and is usually formed to about 7 to 50 μm in consideration of costs, etc.

[0024] The intermediate layer 7 is provided when light blocking properties, gas barrier properties, etc. are required depending on the contents. The intermediate layer 7 can be made of the same resin film, metal foil (aluminum, iron, etc.) as the outer layer 6. The intermediate layer 7 may also be formed by laminating two or more of these resin films and metal foils in combination.

[0025] The inner layer 8 is formed of a thermal adhesive resin. As the thermal adhesive resin for forming the inner layer 8, 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.

[0026] In particular, when alcoholic beverages are used as the contents, it is necessary to minimize the effect on the taste of the contents, so it is preferable to use a non-adsorbent cyclic polyolefin for the inner layer 8. It is also more preferable to laminate linear low-density polyethylene and cyclic polyolefin, which provide high interlayer adhesion, for the inner layer 8. The thickness of the inner layer 8 is determined taking into consideration the content volume, transportation conditions, economic efficiency, etc., but is usually 60 μm to 150 μm.

[0027] The outer layer 6, intermediate layer 7 and inner layer 8 can be laminated by a dry lamination method using a dry lamination adhesive such as a urethane-based adhesive, or an extrusion lamination method using a polyolefin-based resin or the like by hot melt extrusion.

[0028] Examples of the laminate 5 include the following (1) to (3). (1) Outer layer 6: Polyethylene terephthalate and nylon laminated film Middle layer 7: aluminum foil Inner layer 8: Linear low-density polyethylene film (2) Outer layer 6: Laminated film of polyethylene terephthalate and aluminum-coated polyethylene terephthalate film Middle layer 7: Nylon film Inner layer 8: Linear low-density polyethylene film (3) Outer layer 6: Oxide-deposited polyethylene terephthalate film Middle layer 7: Nylon film Inner layer 8: Linear low-density polyethylene film

[0029] The pouch body 11 is formed by stacking two sheets of the laminate 5 with the inner layers 8 facing each other, and thermally bonding the side edges and bottom with the thermally bonded parts 11a, leaving the top open. Next, the pouring tube 14 of the pouring tool 12 is inserted into the opening at the top of the pouch body 11, and the pouch joint part 17 of the pouring tube 14 is sandwiched and thermally bonded between the sheets of the laminate 5. In this way, the pouring tube 14 is attached to the pouch body 11. The contents are then filled into the pouch body 11 from the pouring tube 14, and the cap 13 is attached to the pouring tube 14 to seal it. In this way, the inner container 10 is formed. The pouring outlet of the pouring tube 14 may be hermetically sealed with a film and then sealed with the cap 13.

[0030] The attachment of the spout tube 14 to the pouch body 11, the filling of the contents, and the sealing with the cap 13 may be performed in-line using an automatic filling machine. Alternatively, the spout 12 may be attached after the contents have been filled from the opening at the top of the pouch body 11. Alternatively, the spout 12 may be attached to the laminate 5 in advance in a separate process, and then the pouch body 11 may be formed.

[0031] Although FIG. 2 shows a pouch body 11 in the form of a four-sided sealed pouch with a narrow top, the pouch body 11 is not limited to this and may be in the form of a rectangular four-sided sealed pouch, a gusseted pouch, a self-standing pouch, a three-sided sealed pouch, or the like.

[0032] Figure 5 shows a front cross-sectional view of the body 22 of the outer container 20. The body 22 is made by rolling a rectangular paper sheet into a cylindrical shape and sealing it with an emulsion or hot-melt adhesive. The upper and lower ends of the body 22 are curled, and curled protrusions 22b and 22c are provided on the inner circumferential surface. The upper protrusion 22b of the body 22 fits into a groove 34 in the neck 30, which will be described later.

[0033] A circular bottom plate 22d that covers the underside of the body 22 is disposed on the protruding portion 22c below the body 22. The bottom plate 22d is adhered to the protruding portion 22c with an emulsion or hot melt adhesive. The bottom plate 22d can be made of paper, resin, metal, etc., but it is more preferable to make it from paper.

[0034] The cross-sectional shape of the body 22 is not limited to a circle, but may be a polygon, a rounded polygon, an ellipse, an oval, or any other shape.

[0035] As the paper for forming the body 22 and the bottom plate 22d of the outer container 20, paperboard such as coated cardboard, uncoated cardboard, kraft cardboard, and Manila cardboard can be used. The basis weight of the paperboard is, for example, 100 to 500 g / m 2 is.

[0036] Alternatively, laminated paper may be used, which is made by laminating a thermal adhesive resin onto a paperboard. The resin to be laminated may be a polyolefin-based thermal adhesive resin such as polyethylene or polypropylene. In this case, the bottom panel 22d is thermally bonded to the body 22.

[0037] 6 and 7 show a front view and a top view of the neck 30 of the outer container 20. The neck 30 is formed from two separable separate members 31 and 32 made of a resin molded product. The neck 30 is detachably attached by being inserted into an opening in the top surface of the body 22 (see FIG. 5), and is formed in a tapered tubular shape that gradually narrows upward from a ring-shaped seat 30a disposed on the body 22. Note that the neck 30 is not limited to a tapered shape and may be cylindrical.

[0038] The neck 30 is formed with a smaller diameter below the seating surface 30a than the inner peripheral surface of the body 22, and a protrusion 33 that fits into the inner peripheral surface of the body 22 protrudes radially outward. A protrusion 22b (see FIG. 5) of the body 22 fits into an annular groove 34 formed between the seating surface 30a and the protrusion 33, preventing the neck 30 from slipping out. In addition, because the diameter below the protrusion 33 is smaller than the inner peripheral surface of the body 22, the neck 30 can be easily inserted into the body 22.

[0039] An opening 35 is formed on the top surface of the neck 30. The opening 35 has a pair of parallel, linear locking portions 35a. The locking portions 35a are arranged perpendicular to the dividing surface of the divided members 31, 32. The locking portions 35a lock the rotation stopper portion 15 (see Figure 3) of the spout 12 arranged in the opening 35. This prevents the spout 12 from rotating when the cap 13 is opened. At this time, the longitudinal direction of the flange portion 16 of the spout 12 is arranged in a direction parallel to the dividing surface of the divided members 31, 32.

[0040] In addition, a protrusion 39 is provided on the outer circumferential surface of the neck 30 to prevent the fingers holding the neck 30 from slipping when opening the cap 13.

[0041] Figure 8 shows a front view of split member 31. Split members 31 and 32 are formed to have the same shape. Split member 31 is formed to be approximately symmetrical. Two pins 38 are diagonally arranged and protrude from the peripheral wall of split member 31, and boss holes 37 are formed at symmetrical positions relative to pins 38. By inserting pin 38 of split member 31 into boss holes 37 of split member 32, and inserting pin 38 of split member 32 into boss holes 37 of split member 31, a separable neck portion 30 is formed.

[0042] An opening 35 is provided on the top surface of the dividing member 31, and a plurality of ribs 36 extending downward are provided on both sides of the opening 35. The anti-rotation portion 15 of the spout 12 is disposed in the opening 35, so the dividing members 31 and 32 are disposed with the spout 12 sandwiched between them. In addition, the upper walls and ribs 36 of the dividing members 31 and 32 are disposed between the upper wall 15a of the anti-rotation portion 15 and the flange portion 16. This positions the spout 12 in the vertical direction.

[0043] The divided members 31 and 32 of the neck portion 30 are formed by injection molding of a resin. The resin that can be used to form the neck portion 30 is low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), polypropylene (PP), ethylene-propylene copolymer (PPCO), or acrylonitrile-butadiene-styrene copolymer (ABS).

[0044] The neck portion 30 may be formed from any of the above resins containing 51% by weight or more of paper, or may be formed from any of the above resins containing 51% by weight or more of inorganic powder. The neck portion 30 may also be formed from a biomass-derived resin or a recycled resin. This reduces the amount of petroleum-derived resin used, thereby reducing the environmental impact.

[0045] Examples of inorganic powders include calcium carbonate, calcium sulfate, barium sulfate, kaolin, mica, zinc oxide, dolomite, glass fiber, hollow glass microbeads, silica, chalk, talc, pigment, titanium dioxide, silicon dioxide, bentonite, clay, and diatomaceous earth. Mixtures of two or more of these may also be used. Calcium carbonate is preferred because it is abundant in nature, can be obtained stably at low cost, and has a low environmental impact.

[0046] When disposing of the composite container 1 having the above configuration after use, the neck 30 is pulled out from the body 22 together with the inner container 10, and the neck 30 is separated into the dividing members 31 and 32. This allows the inner container 10 to be discarded as plastic, and the body 22 and bottom panel 22d to be discarded as paper.

[0047] Furthermore, if the main component of the neck portion 30 is resin (including biomass-derived resin and recycled resin), the neck portion 30 can be disposed of as plastic. If the neck portion 30 is made of resin containing 51% or more by weight of paper, the neck portion 30 can be disposed of as paper container packaging. If the neck portion 30 is made of resin containing 51% or more by weight of inorganic substance powder, the neck portion 30 can be disposed of as something other than paper and plastic. Therefore, the composite container 1 can be easily separated and disposed of.

[0048] According to this embodiment, the detachable neck 30 is formed so as to be separable from the paper body 22, so that the composite container 1 can be easily separated into the inner container 10, the neck 30, and the body 22. This allows the composite container 1 to be easily separated into paper, plastic, etc. for disposal.

[0049] Furthermore, a protrusion 22b protruding from the inner peripheral surface is provided at the upper end of the body 22, and a groove 34 into which the protrusion 22b fits is provided at the lower end of the outer peripheral surface of the neck 30. This makes it possible to easily prevent the neck 30, which is detachable from the body 22, from coming off.

[0050] Furthermore, since the neck portion 30 has a locking portion 35a that locks the rotation-stopping portion 15 of the spout 12 to prevent the inner container 10 from rotating, the cap 13 of the spout 12 can be easily opened.

[0051] Furthermore, if the outer container 20 has a paper bottom plate 22d that closes the bottom surface of the body 22, the body 22 and the bottom plate 22d can be disposed of together.

[0052] Furthermore, when the neck portion 30 is made of a resin containing 51% by weight or more of paper, the amount of petroleum-derived resin can be reduced, thereby reducing the environmental impact.

[0053] Furthermore, when the neck portion 30 is made of biomass-derived resin, the amount of petroleum-derived resin can be reduced, thereby reducing the environmental impact.

[0054] Furthermore, when the neck portion 30 is made of a resin containing 51% by weight or more of inorganic powder, the amount of petroleum-derived resin can be reduced, thereby reducing the environmental impact.

[0055] Second Embodiment Next, a composite container 1 of a second embodiment will be described. This embodiment differs from the first embodiment shown in Figs. 1 to 6 above in the configuration of the neck portion 30 of the outer container 20, but other parts are similar to those of the first embodiment. Fig. 9 shows a top view of the neck portion 30 of the outer container 20 of this embodiment. For ease of explanation, parts similar to those of the first embodiment are given the same reference numerals.

[0056] The neck portion 30 is formed by two separable divided members 31 and 32 made of resin. The divided members 31 and 32 are formed to have the same shape. A pair of parallel linear locking portions 35a provided in the opening 35 are arranged parallel to the dividing surface of the divided members 31 and 32. As a result, the longitudinal direction of the flange portion 16 of the spout 12 is arranged perpendicular to the dividing surface of the divided members 31 and 32.

[0057] In this embodiment, as in the first embodiment, the composite container 1 can be easily separated into paper and plastic for disposal.

[0058] <Third embodiment> Next, Fig. 10 shows a perspective view of a composite container 1 of a third embodiment. For ease of explanation, the same parts as those of the first embodiment shown in Figs. 1 to 8 above are denoted by the same reference numerals. In this embodiment, an outer container 20 has a lid 21 that fits over a body 22. The other parts are the same as those of the first embodiment.

[0059] The body 22 of the outer container 20 of this embodiment is formed from a paper sheet similar to that of the first embodiment, and is formed into a cylindrical shape from a laminated sheet formed by stacking two sheets one above the other and offsetting them in the vertical direction. As shown in the vertical cross section of Fig. 11, the inner sheet of the body 22 protrudes upward relative to the outer sheet, and a step 22a is formed on the outer peripheral surface of the upper part of the body 22. The protruding portion 22b at the upper end of the body 22 is formed by applying a curling process to the inner sheet, and the protruding portion 22c at the lower end is formed by applying a curling process to the outer sheet.

[0060] The neck portion 30 has the same shape as that of the first embodiment shown in Figures 6 and 7, and the protrusion 22b of the body portion 22 fits into the groove 34 of the neck portion 30. The neck portion 30 may be formed in the same manner as that of the second embodiment shown in Figure 10.

[0061] The lid 21, like the body 22, is formed into a cylindrical shape from a paper sheet and has a curled upper end. The top surface of the lid 21 is closed by a circular paper top plate 21a. When the composite container 1 is stored, the lid 21 is fitted over the body 22 and engaged at the stepped portion 22a (see Figure 11). This allows the lid 21 to cover the neck 30 of the outer container 20 and the spout 12 of the inner container 10, improving the aesthetic appearance of the composite container 1. The contents can be removed by removing the lid 21 from the body 22 and opening the cap 13.

[0062] In this embodiment, as in the first embodiment, the composite container 1 can be easily separated into paper and plastic for disposal.

[0063] In the first to third embodiments, the neck portion 30 of the outer container 20 is formed by two divided members 31, 32, but the neck portion 30 may be formed by three or more divided members that sandwich the spout 12 therebetween. [Industrial Applicability]

[0064] The present invention can be used as a container for storing liquid contents such as alcoholic beverages (sake, shochu, wine, etc.), juice, fruit juice drinks, coffee, tea, and milk drinks. [Explanation of symbols]

[0065] 1 Composite containers 5. Laminate 6 outer layer 7. Middle class 8 Inner layer 10 Inner container 11 Pouch body 11a Thermal bonding part 12 Pour tool 13 Cap 14 Pour tube 15 Anti-rotation part 15a Upper wall 16 Flange 17 Pouch joint 20 Outer container 21 Lid 21a Top plate 22 Torso 22a Step 22b, 22c protrusion 22d bottom plate 30 Neck 30a seat 31, 32 Divided parts 33 Protrusion 34 Groove 35 Opening 35a Locking part 36 Ribs 37 Boss hole 38-pin 39 Protrusion

Claims

1. A composite container comprising an inner container having a pouch body formed of a resin film and a spout heat-bonded to the pouch body, and an outer container covering the inner container, wherein the outer container has a cylindrical paper body and a cylindrical resin-molded neck detachably attached to the upper end of the body, The pouring tool has a cap and a pouring barrel, The pouring cylinder is formed in a cylindrical shape with a pouring outlet at the upper end, A male screw is formed on the outer peripheral surface of the upper end of the pouring cylinder, A female screw is formed on the inner peripheral surface of the cap, The cap is screwed onto the upper end of the pouring cylinder to close the pouring outlet, The neck portion is formed of a plurality of separable divided members arranged on either side of the spout, A composite container characterized in that the neck portion can be divided by the plurality of divided members in a state where each divided member is not connected to the other divided members.

2. 2. The composite container according to claim 1, wherein a protrusion protruding from the inner peripheral surface is provided at the upper end of the body portion, and a groove into which the protrusion fits is provided at the lower end of the outer peripheral surface of the neck portion.

3. 3. The composite container according to claim 1, wherein the neck portion has a locking portion that locks the spout and prevents the inner container from rotating.

4. 4. The composite container according to claim 1, wherein the outer container has a paper bottom plate that closes the lower surface of the body.

5. 5. The composite container according to claim 1, wherein the neck portion is formed from a resin containing 51% by weight or more of paper.

6. 5. The composite container according to claim 1, wherein the neck portion is formed from a biomass-derived resin.

7. 5. The composite container according to claim 1, wherein the neck portion is formed from a resin containing 51% by weight or more of inorganic powder.

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