Delaminated bottle

Abstract

To provide a delamination bottle in which a flange part of an inner container is prevented from peeling-off from an upper opening edge of a mouth of an outer container by a seal to be removed.SOLUTION: A delamination bottle has an outer container 11 and a flexible inner container 12 for storing a content and deformed with volume reduction following reduction of the content. The inner container is peelably laminated on an inner face of the outer container, and a flange part 14 projecting outward in the radial direction and extending in the circumferential direction is formed at the upper end part of a mouth of the inner container. An undersurface of the flange part is placed at an upper end opening edge 15 of a mouth of the outer container. A sticking face part 17 of a seal S facing upward is provided at the flange part and the upper end opening edge of the mouth of the outer container, and a biting recessed part 18 in a biting state of a part 14a of the flange part is formed at a part positioned outside in the radial direction from the sticking face part, at the upper end opening edge of the mouth of the outer container.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a delaminated bottle. [Background technology]

[0002] Conventionally, a peelable laminated bottle has been known which comprises an outer container and a highly flexible inner container which, as the contents are contained, undergoes volumetric deformation as the contents are reduced, in which the inner container is peelably laminated to the inner surface of the outer container, and a flange portion which protrudes radially outward and extends circumferentially is formed at the upper end of the mouth of the inner container, and the underside of the flange portion is positioned at the upper opening edge of the mouth of the outer container. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-184213 A Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of peelable laminated bottle, if a sealing seal is removably attached to the upper opening edge of the mouth, as shown in Patent Document 1 above, when the sealing seal is removed, the sealing seal may pull the flange portion of the inner container upward, causing the flange portion to peel off from the upper opening edge of the mouth of the outer container. In this case, when the cap is attached to the mouth of the laminated peelable bottle, wrinkles, for example, may occur in the part of the flange that has peeled off from the outer container, making it difficult to ensure a seal between the cap and the mouth of the laminated peelable bottle.

[0005] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a delaminated bottle that can prevent the flange portion of the inner container from peeling off from the upper opening edge of the mouth portion of the outer container due to the removal of the sealing seal. [Means for solving the problem]

[0006] A peelable laminated bottle according to one aspect of the present invention comprises an outer container, and an inner container which is flexible and deforms as contents are contained therein and the volume of the inner container is reduced as the contents are reduced, the inner container being peelably laminated to the inner surface of the outer container, a flange portion which projects radially outward and extends circumferentially at the upper end of the mouth of the inner container, the lower surface of the flange portion being disposed at the upper opening edge of the mouth of the outer container, an upwardly facing attachment surface portion for a sealing seal is provided at the flange portion and the upper opening edge of the mouth of the outer container, and a bite-in recess in which a part of the flange portion bites into is formed at a portion of the upper opening edge of the mouth of the outer container which is positioned radially outward from the attachment surface portion. The upper surface of a part of the flange portion is located below the opening of the biting recess at the upper end opening edge of the mouth of the outer container. .

[0007] A recess into which part of the flange of the inner container is embedded is formed at the upper opening edge of the mouth of the outer container in a portion located radially outward from the adhesive surface of the sealing seal. This increases the adhesion strength between the upper opening edge of the mouth of the outer container and the flange, and prevents the flange from peeling off from the upper opening edge of the mouth of the outer container due to the sealing seal being removed.

[0009] Since the upper surface of a portion of the flange portion is located below the opening of the biting recess at the upper opening edge of the mouth of the outer container, the adhesive strength between the upper opening edge of the mouth of the outer container and the flange portion can be reliably increased.

[0010] A peelable laminated bottle according to one embodiment of the present invention comprises an outer container, and an inner container which is flexible and which is deformed by reducing its volume as the contents are contained therein and the inner container is peelably laminated to the inner surface of the outer container, a flange portion which protrudes radially outward and extends circumferentially is formed at the upper end of the mouth of the inner container, the lower surface of the flange portion is disposed on the upper opening edge of the mouth of the outer container, an upwardly facing attachment surface portion of a sealing seal is provided on the flange portion and the upper opening edge of the mouth of the outer container, and a bite-in recess into which a part of the flange portion bites is formed at a portion of the upper opening edge of the mouth of the outer container which is positioned radially outward from the attachment surface portion, The flange portion and the upper end opening edge of the mouth portion of the outer container are each provided with an inclined surface portion extending downward as it moves radially outward at a portion located radially outward from the attachment surface portion, and the biting recess is provided on the inclined surface portion. There are.

[0011] A recess into which part of the flange of the inner container is embedded is formed at the upper opening edge of the mouth of the outer container in a portion located radially outward from the adhesive surface of the sealing seal. This increases the adhesion strength between the upper opening edge of the mouth of the outer container and the flange, and prevents the flange from peeling off from the upper opening edge of the mouth of the outer container due to the sealing seal being removed. Because the biting recess is provided on the inclined surface portion, it is possible for the biting recess to hold a portion of the flange portion more firmly than when the biting recess is provided on a flat surface facing upward, thereby increasing the adhesion strength between the upper opening edge of the mouth of the outer container and the flange portion. Effect of the Invention

[0012] According to this invention, it is possible to prevent the flange portion of the inner container from peeling off from the upper opening edge of the mouth portion of the outer container due to the sealing seal being removed. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a side view of the mouth of a delaminated bottle shown as one embodiment. [Diagram 2] FIG. 2 is a top view of a portion of FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] 1A to 1C are explanatory diagrams of a method for producing a delaminating bottle according to one embodiment. [Diagram 5] 1A to 1C are explanatory diagrams of a method for producing a delaminating bottle according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a delaminating bottle according to one embodiment will be described with reference to the drawings. 1 to 3, the delaminating bottle 1 according to this embodiment includes an outer container 11 and an inner container 12 that is flexible and that accommodates contents and deforms in volume as the contents decrease, and the inner container 12 is peelably laminated on the inner surface of the outer container 11. The inner container 12 is placed inside the outer container 11. A through hole (not shown) is formed in the outer container 11 to allow outside air to be introduced between the outer container 11 and the inner container 12. The planar shape of this through hole may be any of a circular shape, a square shape, a slit shape, etc., and the position where this through hole is formed may be any of the mouth, body, and bottom of the outer container 11.

[0015] The outer container 11 and the inner container 12 are made of synthetic resin material, and may be made of the same material or different materials. Examples of synthetic resin materials include PET (polyethylene terephthalate), PP (polypropylene), PE (polyethylene), nylon (polyamide), and EVOH (ethylene-vinyl alcohol copolymer).

[0016] The delaminated bottle 1 has at least a mouth portion 13, and a body portion and a bottom portion (not shown). The mouth portion 13, the body portion and the bottom portion are arranged in this order coaxially with a common axis. Hereinafter, this common axis is referred to as the bottle axis O, the side of the mouth 13 of the delaminated bottle 1 along the bottle axis O is referred to as the upper side, and the bottom side of the delaminated bottle 1 is referred to as the lower side. When viewed from the bottle axis O direction, the direction intersecting the bottle axis O is referred to as the radial direction, and the direction going around the bottle axis O is referred to as the circumferential direction.

[0017] The mouth 13 of the laminated peelable bottle 1 is formed by stacking the mouth of the outer container 11 and the mouth of the inner container 12, the body of the laminated peelable bottle 1 is formed by stacking the body of the outer container 11 and the body of the inner container 12, and the bottom of the laminated peelable bottle 1 is formed by stacking the bottom of the outer container 11 and the bottom of the inner container 12. In the following description, unless otherwise specified, it is assumed that both the outer container 11 and the inner container 12 have the same shape.

[0018] A flange portion 14 is formed at the upper end of the mouth of the inner container 12, protruding radially outward and extending in the circumferential direction. The flange portion 14 is formed by bending the upper end of the inner container 12 radially outward. The flange portion 14 extends continuously over its entire length in the circumferential direction. The lower surface of the flange portion 14 is located at the upper opening edge 15 of the mouth of the outer container 11, as shown in Figure 3. An upper opening edge 13 a of the mouth part 13 of the delaminated bottle 1 is composed of a flange part 14 and an upper opening edge 15 of the mouth part of the outer container 11 .

[0019] A portion of the inner container 12 that is continuous with the radially inner end of the flange portion 14 extends almost straight in the direction of the bottle axis O. An upper end of the inner circumferential surface of the mouth of the outer container 11 extends almost straight in the direction of the bottle axis O. The upper end 13b of the inner circumferential surface of the mouth 13 of the delaminating bottle 1 is composed of a portion of the inner container 12 that is connected to the radially inner end of the flange portion 14, and the upper end of the inner circumferential surface of the mouth of the outer container 11. A sealing tube of a cap (not shown) is fitted into the upper end 13b of the inner circumferential surface of the mouth 13 of the delaminating bottle 1. Of the inner circumferential surface of the mouth 13, the upper end 13b is located at the radially innermost position.

[0020] An adhesion surface portion 17 of the sealing seal S is provided on the flange portion 14 and the upper opening edge 15 of the mouth of the outer container 11. The adhesion surface portion 17 faces upward. The adhesion surface portion 17 is provided on the radial inner end portion of each of the flange portion 14 and the upper opening edge 15 of the mouth of the outer container 11. The lower surface of the sealing seal S is peelably adhered (welded) to the upper surface of the adhesion surface portion 17.

[0021] That is, the flange portion 14 of the attachment surface portion 17 faces the bottle axis O direction, and the upper end opening edge 15 of the mouth of the outer container 11 of the attachment surface portion 17 faces upward. The lower surface of the sealing seal S is peelably adhered to the upper surface of the flange portion 14 of the attachment surface portion 17.

[0022] At the upper opening edge 15 of the mouth of the outer container 11, a biting recess 18 into which a part 14a of the flange part 14 is bitten is formed at a portion located radially outward from the adhesive surface part 17. The part 14a of the flange part 14 is bitten into the biting recess 18 over the entire area in the thickness direction. The upper surface of the part 14a of the flange part 14 is located below the opening of the biting recess 18 at the upper opening edge 15 of the mouth of the outer container 11.

[0023] The biting recess 18 is formed in a stripe shape extending in the circumferential direction. The lower surface of the part 14a of the flange portion 14 abuts against the inner surface of the biting recess 18 over the entire area of ​​the inner surface of the biting recess 18. A plurality of biting recesses 18 are provided at intervals in the circumferential direction. The plurality of biting recesses 18 are provided at equal intervals in the circumferential direction. The interval between adjacent biting recesses 18 in the circumferential direction is larger than the circumferential size of the biting recess 18. The biting recess 18 may be provided continuously along the entire circumferential length of the upper opening edge 15 at the mouth of the outer container 11 .

[0024] In each of the flange portion 14 and the upper opening edge 15 of the mouth of the outer container 11, an inclined surface portion 19 is provided at a portion located radially outward from the adhesive surface portion 17, the inclined surface portion 19 extending downward as it moves radially outward. The inclined surface portion 19 is connected radially to the adhesive surface portion 17. The biting recess 18 is provided in the inclined surface portion 19. The biting recess 18 is connected radially to the adhesive surface portion 17. In a vertical cross-sectional view along the bottle axis O, the biting recess 18 opens obliquely upward perpendicular to the inclined surface portion 19.

[0025] Next, a method for manufacturing the delaminated laminate bottle 1 configured as above will be described.

[0026] First, a parison P (a two-dot chain line in FIG. 4) made by heating and melting a synthetic resin material and extruding it into a tube shape is sandwiched between a pair of split dies 51 from the outside in the radial direction, and compressed air A is supplied to the inside of the parison P to expand the parison P. At this time, the entire delaminated bottle 1 is molded, except for the upper opening edge 13a of the mouth part 13 and the upper end part 13b of the inner peripheral surface of the mouth part 13.

[0027] At this time, the plug 52 is pushed into the parison P from above (the extruder side) to form the adhering surface portion 17 and the inclined surface portion 19, i.e., the upper opening edge 13a of the mouth portion 13 and the upper end portion 13b of the inner peripheral surface of the mouth portion 13. The plug 52 is formed in an annular shape and abuts against the parison P over its entire circumferential length. Furthermore, at this time, the connection portion of the parison P between the outer peripheral surface of the mouth portion 13 and the upper end opening edge 13a of the mouth portion 13 is clamped between the split mold 51 and the plug 52 and cut, and the portion P1 located above this connection portion is removed.

[0028] In this embodiment, the plug 52 is provided with a molding pin 53 capable of protruding from and retracting into a molding surface 52a that molds the upper opening edge 13a of the mouth 13, and as shown in Fig. 5, this molding pin 53 is caused to protrude from the molding surface 52a and pushes in the inclined surface portion 19. As a result, a biting recess 18 is formed on the upper opening edge 15 of the mouth of the outer container 11, while a part 14a of the flange portion 14 of the inner container 12 is pushed in and bitten into the biting recess 18.

[0029] As described above, in the laminated peelable bottle 1 of this embodiment, a bite-in recess 18 into which a part 14a of the flange portion 14 of the inner container 12 bites is formed in a portion of the upper opening edge 15 of the mouth of the outer container 11 that is located radially outward from the adhesive surface portion 17 of the sealing seal S. This makes it possible to increase the adhesion strength between the upper opening edge 15 of the mouth of the outer container 11 and the flange portion 14, and prevents the flange portion 14 from peeling off from the upper opening edge 15 of the mouth of the outer container 11 due to the sealing seal S being removed.

[0030] Since the upper surface of part 14a of flange portion 14 is located below the opening of the biting recess 18 at the upper opening edge 15 of the mouth of outer container 11, the adhesion strength between the upper opening edge 15 of the mouth of outer container 11 and flange portion 14 can be reliably increased.

[0031] Since the biting recess 18 is provided on the inclined surface portion 19, it is possible for the biting recess 18 to hold a portion 14a of the flange portion 14 more firmly than when the biting recess 18 is provided on a flat surface facing upward, and the adhesion strength between the upper opening edge 15 of the mouth of the outer container 11 and the flange portion 14 can be increased.

[0032] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0033] For example, the inclined surface portion 19 does not have to be provided on the flange portion 14 and the upper opening edge 15 of the mouth portion of the outer container 11 . The bite recess 18 may be provided in an upwardly facing flat surface.

[0034] In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described embodiments and modified examples may be combined as appropriate. [Explanation of symbols]

[0035] 1. Delaminated bottle 11 Outer container 12 Inner container 14 Flange section 15 Upper opening edge 17 Adhesive surface part 18. Bite recess 19 Slope section S Seal

Claims

1. The container is provided with an outer container and a highly flexible inner container that is capable of reducing in volume as the contents are contained therein and the contents are reduced in volume, the inner container being peelably laminated on the inner surface of the outer container; A flange portion is formed at an upper end of a mouth portion of the inner container, the flange portion protruding radially outward and extending in a circumferential direction, a lower surface of the flange portion is disposed on an upper end opening edge of a mouth portion of the outer container; the flange portion and the upper end opening edge of the mouth portion of the outer container are provided with an upwardly facing adhesive surface portion for a sealing seal; a recessed portion formed in a radially outer portion of the upper opening edge of the mouth of the outer container, the recessed portion being engaged with a part of the flange portion; A delaminated bottle, wherein an upper surface of a portion of the flange portion is located below an opening of the biting recess at the upper opening edge of the mouth of the outer container.

2. A container comprising an outer container and an inner container having a high degree of flexibility that reduces in volume as the contents are contained therein and are reduced in size, the inner container being peelably laminated to the inner surface of the outer container; A flange portion is formed at an upper end of a mouth portion of the inner container, the flange portion protruding radially outward and extending in a circumferential direction, a lower surface of the flange portion is disposed on an upper end opening edge of a mouth portion of the outer container, the flange portion and the upper end opening edge of the mouth portion of the outer container are provided with an upwardly facing adhesive surface portion for a sealing seal; a recessed portion formed in a radially outer portion of the upper opening edge of the mouth of the outer container, the recessed portion being engaged with a part of the flange portion; The flange portion and the upper end opening edge of the mouth portion of the outer container are each provided with an inclined surface portion extending downward as it moves radially outward at a portion located radially outward from the attachment surface portion, The biting recess is provided on the inclined surface portion of the laminated peelable bottle.

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