JPH09226750A - Paper container for liquid with plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a plug part made of plastic to be easily removed from a paper container body for liquid formed of a composite sheet mainly comprising a paper base sheet by attaching the plug on an outermost or innermost face of the paper container body via a ring-like film which can be peeled off. SOLUTION: A plug B for external attaching includes an ejection port 11 and a flange 12, wherein a lower face of the flange 12 is integrally attached by adhesive agent or heat-welding to, for example, an external face of an upper plate A1 which forms a part of an outer plate of a container body A via a ring-like film which can be peeled off. The ejection port 11 can be lidded with a lid part C such as a cap mounted from outside so that it can be screwed or fitted. Thus separation of a paper base and a plastic material at the time of recycling or disposal is easy, thereby simplifying processing after use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid paper container made of a composite sheet mainly composed of paper for liquid packaging and a synthetic resin film, and more specifically, it is attached to the container body in consideration of the recyclability of the container. The present invention relates to a liquid paper container with a stopper in which the plastic stopper part can be easily separated from the container body.

[0002]

2. Description of the Related Art A conventional container body of a liquid paper container with a spigot is formed as a container for liquid packaging by a composite sheet in which a synthetic resin film or an aluminum foil is attached to the front and back surfaces of a paper base sheet. ing.

There are various forms of the container body,
Generally, the top of the container body is provided with a spout for spouting the filled and packed liquid contents (spout and a cap for covering the spout). Is generally provided with a spout portion and a flange portion, on the outer surface of the container body,
Alternatively, the mouth plug is inserted from the inside of the container so as to project to the outer surface, and the flange portion is attached and attached to the inner surface of the container.

Since the above-mentioned stopper is usually made of plastic by molding, when the container body is discarded after the container is used, only the plastic stopper is separated and removed from the container body. It is necessary to separately recycle only the container mainly made of paper.

[0005]

However, the operation of separating the stopper from the container body for the above reprocessing treatment is
When trying to remove the spout from the state of the container as it was, it could not be easily separated and required time and labor.

The present invention is a container formed of a composite sheet mainly composed of a paper base sheet when the liquid paper container with a spout for liquid packaging as described above is to be recycled or disposed of after use. Another object of the present invention is to make it possible to separate and remove the plastic plug portion from the main body more easily than before.

[0007]

SUMMARY OF THE INVENTION The present invention provides a peel-off on the outermost or innermost surface of a liquid paper container body formed of a composite sheet in which at least a synthetic resin film layer is laminated on the front and back sides of a paper base sheet layer. A liquid paper container with a cap, comprising a cap part attached via a possible ring-shaped film.

Further, the present invention is the liquid paper container with a stopper according to the above invention, wherein the inner diameter of the ring-shaped film is the same as the inner diameter of the hole portion of the liquid container body. is there.

Further, the present invention is the liquid paper container with a stopper according to the above invention, wherein the inner diameter of the ring-shaped film is larger than the inner diameter of the hole portion of the liquid container body. is there.

Further, the present invention is the liquid paper container with a stopper according to the above invention, wherein the ring-shaped film is provided with a pull tab.

In the liquid paper container with a stopper according to the present invention, the outermost surface or innermost surface of the liquid paper container body and the ring-shaped film may be separated from each other by delamination, or by delamination and cohesive delamination. A liquid paper container with a stopper that can be peeled off by both.

Further, the present invention is the liquid paper container with a stopper according to the above invention, wherein the composite sheet is formed by laminating at least a synthetic resin film layer on the front and back sides of a paper base sheet layer.
A liquid paper container with a stopper, which is a composite sheet in which a synthetic resin film layer is bonded to one surface of the container, which is an inner surface side, via an aluminum foil layer.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

[Liquid Paper Container with External Plug Portion] The present invention will be described in detail below according to an embodiment of a liquid paper container with a plug provided with an external plug portion.

FIG. 1 is an overall external perspective view of a liquid paper container with a stopper according to the present invention having an external plug portion, and a synthetic resin film mainly composed of a paper base sheet for liquid packaging. It is composed of a container body A (for example, a gable top type) formed of a laminated composite sheet, and a plastic plug portion B attached to the outer surface of the container body A such as an upper portion (top portion). The spout part B is provided with a capping part C such as a separate cap or an integrated cap so that the cap can be capped.

As shown in the figure, the external plug portion B is provided with a spout portion 11 and a flange portion 12 (overhang portion), and the lower surface of the flange portion 12 is a part of the outer surface plate of the container body A. Of the upper plate A ₁ is integrally attached to the outer surface of the upper plate A ₁ via a peel-off (peelable) ring-shaped film 21 by an adhesive or heat fusion, and the plug portion B is peeled off from the container body A. Separation is possible via the ring-shaped film 21 which can be peeled off.

The container body A and the external plug portion B according to the present invention can be separated via the ring-shaped film 21 as described above, and the outer surface of the container body A (the synthetic resin film) is separated. Although the ring-shaped film 21 capable of peeling off from (layer) can be peeled by delamination or can be peeled by delamination and cohesive failure, during normal container storage, transportation and use,
It is attached with enough strength that it cannot be easily peeled off.

A capping portion C such as a cap is screwed or fitted to the spout 11 from the outside so that the cap can be capped.

[Peel-off capable ring-shaped film] The peel-off capable ring-shaped film 21 is
The purpose is to remove the plug part B from the container body A which is no longer needed after use, and has a peel-off property to the extent that it is sufficiently resistant and functional for liquid packaging. B from the container body A by delamination,
Alternatively, it has maximum attachment strength within a range in which it can be removed (peeled off) by peeling due to delamination and cohesive failure.

A ring-shaped film 21 capable of peeling off
As shown in FIG. 1, it is interposed between the flange portion 12 of the spout portion B and the outer surface plate A ₁ of the container body A, and both of them are attached so as to be peeled off. Adhering to the outer surface plate A ₁ of the container body A with an outer edge having a shape (size smaller than the flange portion 12 or the same size or larger size) along the outer periphery of the flange portion 12 of the spigot portion B. It is adhered to the whole or part by peeling off with an agent or heat fusion.

[Composite Sheet of Container Body with External Plug] Outer plate A ₁ of the container body A shown in FIGS. 2 (a) to 2 (c)
As shown in the enlarged side cross-sectional view of the attachment of the plug portion and the plug portion B, the composite sheet 30 forming the outer surface plate constituting the container body A with the external plug is at least the paper base sheet 31 and both surfaces thereof. It is not particularly limited except that it is composed of one to a plurality of laminated synthetic resin film layers 32 and 33. For example, the synthetic resin film layers include polyethylene film layers 32 and 33 (or polyethylene terephthalate film layers). 32, 33) are laminated, and if necessary, an aluminum foil layer, a polyethylene terephthalate film layer, and a polyethylene layer are further laminated in this order on the polyethylene film layer 33 corresponding to the inner surface side of the container body A. It may be something.

The composite sheet 3 forming the container body A
In addition to this, various laminated structures can be used for 0, and are not particularly limited in the present invention.

[Regarding the container body and the external plug portion]
FIG. 2A shows an external plug member B and an external plate (for example, external plate A) constituting a container body A to which the plug member B is attached.
_{1 is} a partial side sectional view of FIG. ₁ ), showing a spout 1 of the spout B.
1 has a hole portion A ₀ penetrating the outer surface plate A ₁ just below a hole portion 11a for liquid pouring out, and the flange portion 12 of the spout portion B has the hole portion. The ring-shaped film 21 capable of peeling off is attached to the outer peripheral surface of the portion A _{0 by} an adhesive or heat fusion.

[Materials of External Plug and Ring Film] As shown in FIG. 2A, the external plate of the container body A for the external plug-equipped container formed by the composite sheet 30. When A ₁ is provided with the polyethylene film layer 32 on the outermost surface, polyethylene resin is used for the material of the plug portion B and the material of the ring-shaped film, and the outer surface plate A ₁ of the container body A and the ring are used. A peel-off layer 22 made of a synthetic resin film or a coating capable of peeling off prepared by blending a polyethylene terephthalate resin is provided on the inner surface superposed with the film 21.

As described above, the materials for the external plug portion and the ring-shaped film use the resins having adhesiveness (compatibility) with each other.

Further, for example, the polyethylene resin layer 33 on the outermost surface of the container body A has a plug portion B made of polyethylene resin.
If heat-sealing is performed via a ring-shaped film 21 capable of peeling off, as the ring-shaped film 21, a synthetic resin material in which polypropylene is blended with polypropylene (seal strength capable of peeling off by adjusting the blending ratio (adhesion) (Strength) can be adjusted appropriately)
Alternatively, the synthetic resin film which becomes the ring-shaped film 21 may be coated with a release varnish of polyamide resin, silicone resin, or the like in a pattern or in a pattern.

[Attachment and Removal of External Port Plug Part 1]
As shown in the enlarged side sectional view for explaining the attachment structure of the outer surface plate A ₁ of the container body A and the plug portion B of FIG. 2A, the ring-shaped film 21 capable of peeling off is the flange of the plug portion B. The film 21 is interposed between the portion 12 and the peripheral edge of the hole portion A ₀ (opening portion) penetrating the outer surface plate A ₁ of the container body A, and both of them are attached so as to be peeled off. , An outer edge having a shape along the outer periphery of the flange portion 12 of the spout portion B (a size slightly smaller than the flange portion 12, or the same size, or a slightly larger size),
It is adhered to the outer surface plate A ₁ of the container body A by an adhesive or heat fusion so as to be peeled off entirely or partially over at least the entire circumference of the flange portion 12.

As shown in FIG. 2A, the ring-shaped film 21 is provided with a peelable layer 22 on its lower surface, and the upper surface of the ring-shaped film 21 and the lower surface of the flange portion 12 of the spout portion B. Are firmly adhered to each other over the entire surface by an adhesive or heat fusion.
The peelable layer 22 on the lower surface and the synthetic resin film layer 32 of the outer plate A ₁ can be peeled off from each other (can be peeled off),
Therefore, the plug portion B is to be removed from the container body A by peeling between the ring-shaped film 21 and the synthetic resin film layer 32 of the outer surface plate A ₁ (layer peeling, or peeling due to interlayer peeling and cohesive failure). is there.

The peelable layer 22 (film layer or coating layer) may be provided between the ring-shaped film 21 and the synthetic resin film layer 32, which can be peeled off, if necessary. The ring-shaped film 2
1 may be used as a film which also serves as the peelable layer 22.

On the inner surface side of the container, if necessary, the inner surface of the ring-shaped film 21 protruding toward the inside of the hole portion A ₀ of the container body A is adhered and sealed to the inner sticking film 34 ( A synthetic resin film or an aluminum foil layer) may be provided.

[Attachment and removal of external plug part 2]
As shown in the enlarged side sectional view for explaining the mounting structure of the outer surface plate A ₁ of the container body A and the plug portion B of FIG. 2B, the peelable ring-shaped film 21 is a flange of the plug portion B. The film 21 is interposed between the portion 12 and the peripheral edge of the hole portion A ₀ (opening portion) penetrating the outer surface plate A ₁ of the container body A, and both of them are attached so as to be peeled off. , An outer edge having a shape along the outer periphery of the flange portion 12 of the spout portion B (a size slightly smaller than the flange portion 12, or the same size, or a slightly larger size),
It is adhered to the outer surface plate A ₁ of the container body A by an adhesive or heat fusion so as to be peeled off entirely or partially over at least the entire circumference of the flange portion 12.

Between the ring-shaped film 21,
As shown in FIG. 2B, the peelable layer 22 is provided, and the upper surface of the ring-shaped film 21 and the lower surface of the flange portion 12 of the plug portion B, and the lower surface of the ring-shaped film 21 and the outer surface plate A ₁
The synthetic resin film layer 32 is firmly adhered to the synthetic resin film layer 32 by an adhesive or heat fusion, and can be peeled off by the peelable layer 22 between the ring-shaped films 21 (removable). And therefore the spout B
Is a peelable layer 22 between the ring-shaped films 21 and 21.
Is removed from the container main body A by peeling (delamination, or delamination and cohesive failure).

On the inner surface side of the container, if necessary, the inner surface of the ring-shaped film 21 protruding toward the inside of the hole portion A ₀ of the container body A is adhered and sealed to the inner sticking film 34 ( A synthetic resin film or an aluminum foil layer) may be provided.

[Attachment and Removal of External Port Plug Part 3]
As shown in the enlarged side sectional view for explaining the mounting structure of the outer surface plate A ₁ of the container body A and the plug portion B of FIG. 2C, the ring-shaped film 21 capable of peeling off is the flange of the plug portion B. The portion 12 and the peripheral edge of the perforated portion A ₀ (opening portion) penetrating the outer surface plate A ₁ of the container body A are interposed so that they can be peeled off. The outer peripheral edge has a tab 21 formed of a large-sized outer edge partially protruding from the outer periphery of the flange portion 12 of the spout portion B.
a is attached to the outer surface plate A ₁ of the container body A so as to be peeled off entirely or partially by an adhesive or heat fusion.

As shown in FIG. 2 (c), the ring-shaped film 21 is provided with a peelable layer 22 on its lower surface, and the upper surface of the ring-shaped film 21 and the flange portion 1 of the plug portion B are separated.
The two lower surfaces are firmly adhered to each other entirely by an adhesive or heat fusion, and the peelable layer 22 on the lower surface of the ring-shaped film 21 and the synthetic resin film layer 32 of the outer plate A ₁ are , Which can be peeled off from each other (can be peeled off), and therefore, the mouth plug portion B has the ring-shaped film 2
Peeling of the ring-shaped film 21 by the peelable layer 22 by pulling the tab 21a of No. 1 upward (delamination,
Alternatively, it is removed from the container body A by delamination and peeling due to cohesive failure.

On the inner surface side of the container, if necessary, the inner surface of the ring-shaped film 21 protruding toward the inside of the hole portion A ₀ of the container body A is adhered and sealed to the inner sticking film 34 ( A synthetic resin film or an aluminum foil layer) may be provided.

[Attachment and Removal of External Port Plug Part 4]
As shown in the enlarged side sectional view for explaining the mounting structure of the outer surface plate A ₁ of the container body A and the spout part B of FIG. 2 (d), a hole portion formed through the outer surface plate A ₁ of the container body A. The synthetic resin film layer 32 at the periphery of A ₀ (opening) is first covered with the ring-shaped film 23 serving as a base, and firmly adhered over the entire surface by an adhesive or heat fusion.

Ring-shaped film 21 capable of peeling off
Is located between the upper surface of the ring-shaped film 23 and the lower surface of the flange portion 12 of the spout portion B, and is firmly adhered to the flange portion 12 entirely by an adhesive or heat fusion, The ring-shaped film 23 is adhered to the ring-shaped film 23 by adhesive or heat fusion so as to be peeled off entirely or partially over at least the entire circumference of the flange 12.

The outer peripheral edge of the film 21 is provided with a tab 21a having a large size outer peripheral edge partially protruding from the outer periphery of the flange portion 12 of the spout B.

As shown in FIG. 2 (d), a peelable layer 22 is provided on the lower surface of the ring-shaped film 21, and the upper surface of the ring-shaped film 21 and the flange portion 12 of the plug portion B are provided.
The lower surface is firmly adhered to the entire surface by an adhesive or heat fusion, and the peelable layer 22 on the lower surface of the ring-shaped film 21 and the base ring-shaped film 23 can be peeled off from each other (can be peeled off). ), And therefore, the plug portion B is the tab 21 of the ring-shaped film 21.
The ring-shaped film 2 by pulling a upward
1 and the base ring-shaped film 23 are removed from the container body A by peeling (interlayer peeling, or peeling due to interlayer peeling and cohesive failure).

A single film may be used as the ring-shaped film 21 for adhering the ring-shaped film 21 and the base ring-shaped film 23 capable of peeling off, but if necessary, a peelable layer 22 may be provided between them. (Film layer or coating layer) may be provided.

On the inner surface side of the container, a base ring-shaped film 23 or a ring-shaped film 21 capable of peeling off, which protrudes toward the inside of the hole portion A ₀ of the container body A, is provided on the inner peripheral surface side, if necessary. An inner sticking film 34 (a synthetic resin film or an aluminum foil layer) that is adhered and sealed may be provided.

Further, the ring-shaped film 21 and the base ring-shaped film 23 may be reinforced and adhered and sealed by a point seal 23a provided in a ring shape along the outer periphery of the flange portion 12.

[Attachment and Removal of External Port Plug Part 5]
As shown in the enlarged perspective view for explaining the mounting structure of the outer surface plate A ₁ of the container body A and the spout portion B of FIG. 3, the outer surface plate A ₁ of the container body A and the outer spout portion B are , The outer plate A of the container body A via the ring-shaped film 21 capable of peeling off
_The film 21 is attached to ₁ by an adhesive or heat fusion so as to be separated from each other, and has a side sectional structure as shown in FIGS. 2 (c) to 2 (d). The outer peripheral edge is provided with a tab 21a having a large outer edge that partially protrudes from the outer periphery of the flange portion 12,
The tab 21a is extended to the outer surface plate A ₂ adjacent to the outer surface plate A ₁ constituting the container body A.

The spout B is peeled off between the ring-shaped film 21 and the outer plate A ₁ of the container body A by pulling the tab 21a of the ring-shaped film 21 upward (delamination or delamination). It is removed from the container body A by peeling due to cohesive failure).

[Liquid Paper Container with Internal Plug] Next, the present invention will be described in detail below in accordance with an embodiment of a liquid paper container with a plug provided with a plug portion for internal mounting.

FIG. 4 is an overall perspective view of a liquid paper container with a stopper according to the present invention having an internal plug portion, which is a synthetic resin film mainly composed of a paper base sheet for liquid packaging. Container body A (for example, a gable top type) formed of a laminated composite sheet, and a plastic stopper attached to the container body A so as to project from the inner surface side to the outer surface side such as the upper part (top portion) of the outer surface plate. And part B. The spout part B is provided with a lid part C such as a separate cap or an integrated cap so that the lid part can be capped. The composite sheet used for forming the container as the container body A is substantially the same as the composite sheet used for the liquid paper container with the external plug portion described above, and is not particularly limited.

As shown in the figure, the plug portion B for internal attachment is provided with a spout portion 11 and a flange portion 12 (overhang portion), and the upper surface of the flange portion 12 is a part of the outer surface plate of the container body A. , The upper plate A ₁ is integrally attached to the inner surface of the upper plate A ₁ via a peel-off (separable) ring-shaped film 21 by an adhesive or heat fusion, and the stopper B is peeled off from the container body A. Separation is possible via the ring-shaped film 21 which can be peeled off.

The container body A and the plug portion B for internal attachment in the present invention can be separated via the ring-shaped film 21 as described above, and the inner surface of the container body A (the synthetic resin film) can be separated. Although the ring-shaped film 21 capable of peeling off from (layer) can be peeled by delamination or can be peeled by delamination and cohesive failure, during normal container storage, transportation and use,
It is attached with enough strength that it cannot be easily peeled off.

A capping portion C such as a cap is screwed or fitted to the spout 11 from the outside so that the capping portion 11 can be capped.

[Regarding Peel-Off Ring-Shaped Film] The peel-off ring-shaped film 21 is
It is for removing the plug part B from the container body A which is no longer needed after use, and has peel-off performance within a range that is sufficiently resistant and functions as a liquid packaging. It has the maximum attachment strength to the extent that B can be removed (peeled off) from the container body A by delamination or by delamination and cohesive failure.

Ring-shaped film 21 capable of peeling off
As shown in FIG. 1, it is interposed between the upper surface of the flange portion 12 of the spout portion B and the inner surface of the outer surface plate A ₁ of the container body A, and both of them are adhered in a peelable manner. There is, for example, an outer edge of a shape (a size smaller than the upper surface of the flange portion 12 or the same size or a larger size) along the outer periphery of the upper surface of the flange portion 12 of the spout portion B, and It is adhered to the outer surface plate A ₁ with an adhesive or heat fusion so that it can be peeled off entirely or partially.

[Composite Sheet of Container Body with Internal Plug] Outer plate A ₁ of the container body A shown in FIGS. 5 (a) and 5 (b)
As shown in the enlarged side cross-sectional view of the attachment of the plug portion and the plug portion B, the composite sheet 30 forming the outer surface plate constituting the container body A with the internal plug and plug is at least the paper base sheet 31 and both surfaces thereof. It is not particularly limited except that it is composed of one to a plurality of laminated synthetic resin film layers 32 and 33. For example, the synthetic resin film layers include polyethylene film layers 32 and 33 (or polyethylene terephthalate film layers). 32, 33) are laminated, and if necessary, an aluminum foil layer, a polyethylene terephthalate film layer, and a polyethylene layer are further laminated in this order on the polyethylene film layer 33 corresponding to the inner surface side of the container body A. It may be something.

The composite sheet 3 forming the container body A
In addition to this, various laminated structures can be used for 0, and are not particularly limited in the present invention.

[Regarding the container body and the plug portion for internal attachment]
FIG. 5A shows a plug portion B for internal attachment, and an outer plate (eg, outer plate A that constitutes the container body A to which the plug portion B is attached).
₁ ) A partial side sectional view of FIG. ₁ ), in which a spout B having a hole 11a for pouring liquid through the spout 11 has the spout 11 from the inside of the container and the outer plate A _The spout portion 11 is fitted into the hole portion A _{0 having the} same size as the diameter of the spout portion 11 penetrating through ₁ .

The flange portion 12 of the spigot portion B is attached to the inner surface around the hole portion A ₀ of the outer surface plate A ₁ by an adhesive or heat fusion via a peel-off ring-shaped film 21. It is installed.

[Material for Inner Plug and Ring Film] As shown in FIG. 5A, the outer surface plate of the container body A for the container with the inner plug formed by the composite sheet 30. When A ₁ is provided with the polyethylene film layer 33 on the innermost surface, the material of the plug portion B and the ring-shaped film 2
Polyethylene resin is used for the material of _{No. 1} , and the inner surface of the polyethylene film layer 33 and the ring-shaped film 21 on the innermost surface of the outer surface plate A ₁ of the container body A, or the upper surface of the plug portion B and the ring. A peel-off layer 22 made of a synthetic resin film or a coating capable of peeling off prepared by blending a polyethylene terephthalate resin is provided on the inner surface superposed with the film 21.

As described above, it is appropriate to use resins having adhesiveness (compatibility) for the material of the plug portion B for internal attachment and the ring-shaped film 21.

Further, for example, the polyethylene resin layer 33 on the innermost surface of the container body A is provided with a plug portion B made of polyethylene resin.
If heat-sealing is performed via a ring-shaped film 21 capable of peeling off, as the ring-shaped film 21, a synthetic resin material in which polypropylene is blended with polyethylene (seal strength capable of peeling off by adjusting the blending ratio (adhesion) (Strength) can be adjusted appropriately)
Alternatively, the synthetic resin film which becomes the ring-shaped film 21 may be coated with a release varnish of polyamide resin, silicone resin, or the like in a pattern or in a pattern.

[Attachment and removal of internal plug part 1]
As shown in the enlarged side sectional view for explaining the mounting structure of the outer surface plate A ₁ of the container body A and the plug portion B of FIG. 5A, the ring-shaped film 21 capable of peeling off is the flange of the plug portion B. The film 21 is interposed between the portion 12 and the peripheral edge of the hole portion A ₀ (opening portion) penetrating the outer surface plate A ₁ of the container body A, and both of them are attached so as to be peeled off. , An outer edge having a shape along the outer periphery of the flange portion 12 of the spout portion B (a size slightly smaller than the flange portion 12, or the same size, or a slightly larger size),
It is adhered to the outer surface plate A ₁ of the container body A by an adhesive or heat fusion so as to be peeled off entirely or partially over at least the entire circumference of the flange portion 12.

As shown in FIG. 5A, the ring-shaped film 21 is provided with a peelable layer 22 on the upper surface thereof, and the lower surface of the ring-shaped film 21 and the lower surface of the flange portion 12 of the spout portion B. Are firmly adhered to each other over the entire surface by an adhesive or heat fusion.
The peelable layer 22 on the upper surface of _{No. 1} and the innermost synthetic resin film layer 33 of the outer surface plate A ₁ can be peeled off from each other (can be peeled off). Therefore, the plug portion B can be separated from the ring-shaped film 21. The container body A is separated by the peelable layer 22 between the outermost plate A ₁ and the innermost synthetic resin film layer 32 (delamination, or delamination and delamination and cohesive failure).
It is something to remove more.

A single film may be used as the ring-shaped film 21 for the peel-off attachment of the ring-shaped film 21 and the synthetic resin film layer 33, but if necessary, the peeling property may be provided between them. A layer 22 (film layer or coating layer) may be provided.

[Attachment and removal of internal plug part 2]
As shown in the enlarged side cross-sectional view for explaining the attachment structure of the outer surface plate A ₁ of the container body A and the plug portion B of FIG. 5B, the peelable ring-shaped film 21 is a flange of the plug portion B. The flange portion 12 is interposed between the portion 12 and the peripheral edge of the hole portion A ₀ (opening portion) penetrating the outer surface plate A ₁ of the container main body A so as to be peelable off. The outer peripheral edge of the tab 1 has a large size outer edge partially protruding from the outer periphery of the flange portion 12 of the spout portion B.
2a, and is adhered to the outer surface plate A ₁ of the container body A by adhesive or heat fusion so as to be peeled off entirely or partially over at least the entire circumference of the flange 12.

As shown in FIG. 5B, the ring-shaped film 21 is provided with a peelable layer 22 on the upper surface thereof, and the lower surface of the ring-shaped film 21 and the upper surface of the flange portion 12 of the plug portion B. Are firmly adhered to each other over the entire surface by an adhesive or heat fusion.
The peelable layer 22 on the upper surface of _{No. 1} and the innermost synthetic resin film layer 33 of the outer plate A ₁ can be peeled off from each other (can be peeled off), so that the plug portion B can be used after the container body A is disassembled. , The ring-shaped film 21 and the outer plate A by pulling the tab 12a of the flange portion 12 upward.
Peeling by the peeling layer 22 between the innermost layer of the synthetic resin film layer 33 of ₁ (delamination or peeling by delamination cohesive failure) by those detached from the container body A.

A single film may be used as the ring-shaped film 21 for the peel-off attachment of the ring-shaped film 21 and the synthetic resin film layer 33, but if necessary, the peeling property may be provided between them. A layer 22 (film layer or coating layer) may be provided.

[Attachment and removal of internal plug part 3]
As shown in the enlarged side sectional view for explaining the attachment structure of the outer surface plate A ₁ of the container body A and the plug portion B of FIG. 5C, the ring-shaped film 21 capable of peeling off is the flange of the plug portion B. The film 21 is interposed between the portion 12 and the periphery of the hole portion A ₀ (opening portion) penetrating the outer surface plate A ₁ of the container body A, and both of them are adhered so that peel-off is possible. , An outer edge having a shape along the outer periphery of the flange portion 12 of the spout portion B (a size slightly smaller than the flange portion 12, or the same size, or a slightly larger size),
It is adhered to the outer surface plate A ₁ of the container body A by an adhesive or heat fusion so as to be peeled off entirely or partially over at least the entire circumference of the flange portion 12.

Ring-shaped film 21 capable of peeling off
Is provided with a peelable layer 22 between the base films, and the lower surface of the ring-shaped film 21 and the flange portion 12 of the plug portion B are
The upper surface is firmly adhered to the entire surface by an adhesive agent or heat fusion, and the upper surface of the ring-shaped film 21 and the innermost synthetic resin film layer 33 of the outer plate A ₁ can be peeled off from each other. (Peeling is possible), and therefore, the plug portion B is separated from the container main body A by peeling by the peelable layer 22 between the ring-shaped films 21, 21 (delamination between layers, or peeling due to delamination and cohesive failure). It is something to remove.

[Other Structure of Externally Attached or Internally Attached Plug Portion] As the structure of the plug portion B used in the liquid paper container of the present invention,
Although not particularly limited, the following structure can be used in addition to the above-mentioned mouth plug part B.

For example, as the external plug portion B, as shown in FIG. 6, it is slidable in the vertical direction along a linear guide continuously provided on the inner peripheral surface of the holed portion 11a of the spout portion 11. It is a spigot part B in which a simple cylindrical body 15 is attached.

The stopper B is an outer surface plate A _{1 of the} container body A.
Pre Ana設is an opening A _O for output liquid Note that hermetically sealed the inner laminated film 34 (aluminum foil, synthetic resin film) for sealing the form of spout of the liquid feed container body A having a like To use as.

The cylindrical body 15 is the spout 1 of the spout B.
1 When the cover portion C is screwed onto the outer periphery and is covered, it is in the upper stop position, and the cover portion C is loosened by the rotation to loosen the plug portion B.
When the lid is further separated, the camshaft 14 integrally provided inside the lid C in the vertical direction rotates, and the cam follower fitted to the cam provided on the outer periphery of the camshaft 14 provided on the cylindrical body 15 allows The cylindrical body 15 is moved down to the bottom stop position, and the sawtooth-shaped blade portion 15 at the lower end of the cylindrical body 15 is moved.
It is possible to use the spout part B provided with an opening device for breaking and opening the inner attached film 34 located below by a.

Further, as the external plug portion B, FIG.
As shown in FIG. 3, a downward projection 13 is provided on the lower surface of the flange 12 of the spout B, and the projection 13 is formed into a ring-shaped film 21.
The ring-shaped film 21 is cut into the upper surface.
The flange portion 12 may be attached and attached to the upper surface by an adhesive or heat fusion.

As the external or internal plug portion B, as shown in FIG. 7, a sealing plate 16 having a half cut 16a is provided in the spout portion 11 of the plug portion B, and the sealing is performed. Plug part B to which a pull ring 17 for breaking and opening the half cut 16a by pulling up the plate 16 is attached
Can be used.

[Regarding Various Plane Shapes of Periphery of Flange Portion of Externally Attached or Internally Attached Plug] Also, the plane of the flange portion 12 of the externally or internally attached stopper B used in the liquid paper container of the present invention. The shape is not particularly limited, and various shapes such as a circular shape and a polygonal shape can be used, for example, a perfect circular shape, an elliptical shape, and a substantially pentagonal shape.

[0074]

EFFECTS OF THE INVENTION The liquid paper container with a spout of the present invention is mainly composed of a paper base sheet, which does not require a great deal of time and labor as in the conventional case when it becomes unnecessary after the use and is reprocessed. It is possible to remove and separate the plastic plug part from the container body by a relatively easy operation,
This has the effect of facilitating the processing operation when recycling or discarding after use.

[Brief description of drawings]

FIG. 1 is an external perspective view of an external plug portion of a liquid paper container with a plug according to the present invention.

2 (a) to 2 (d) are side cross-sectional views illustrating various attachment structures of the external spout part of the liquid paper container with spout of the present invention.

FIG. 3 is an external perspective view of another external spout part in the liquid paper container with spout of the present invention.

FIG. 4 is a perspective view of the appearance of an internal plug portion of the liquid paper container with a plug according to the present invention.

5 (a) to 5 (c) are side cross-sectional views for explaining various attachment structures of the internal stopper cap portion of the liquid paper container with stopper according to the present invention.

FIG. 6 is a side sectional view for explaining the structure of another plug portion of the liquid paper container with a stopper according to the present invention.

FIG. 7 is a side sectional view for explaining the structure of another plug portion of the liquid paper container with a stopper according to the present invention.

[Explanation of symbols]

A ... Container body A _O ... Perforated part (opening) A ₁ , A ₂ ...
Outer surface plate B ... Plug portion C ... Covering portion 11 ... Spouting portion 11a ... Hole portion 12 ... Flange portion
14 ... Cam shaft 15 ... Cylindrical body 15a ... Blade part 21 ... Peel-off ring-shaped film 21a ... Tab 22 ... Peelable layer 23 ... Base ring-shaped film 31 ... Paper base sheet layer 32, 33 ... Synthetic resin film layer 34 … Internal film

Claims (6)

[Claims] 1. A peel-off ring-shaped film is provided on the outermost or innermost surface of a liquid paper container body formed of a composite sheet in which at least synthetic resin film layers are attached to the front and back sides of a paper base sheet layer. A liquid paper container with a stopper, comprising: 2. The liquid paper container with a stopper according to claim 1, wherein the inner diameter of the ring-shaped film is the same as the inner diameter of the hole portion of the liquid container body. 3. The liquid paper container with a stopper according to claim 1, wherein the inner diameter of the ring-shaped film is larger than the inner diameter of the hole portion of the liquid container body. 4. The liquid paper container with a stopper according to claim 2, wherein the ring-shaped film is provided with a pull tab. 5. The outermost or innermost surface of the liquid paper container body and the ring-shaped film are separated from each other by delamination,
Alternatively, the liquid paper container with a stopper according to claim 1 or 2, which can be peeled by both delamination and cohesive peeling. 6. The composite sheet, wherein at least a synthetic resin film layer is attached to the front and back sides of a paper base sheet layer, and the synthetic resin film layer is provided on one side which is the inner side of the container via an aluminum foil layer. The liquid paper container with a stopper according to claim 1, which is a laminated composite sheet.