JPH09124051A - Double-structure squeeze container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an inner container main body and an outer container main body separable from each other and reliably prevent contents from being oxidized. SOLUTION: A double-structured squeeze container 10 has a container main body 13 comprising an inner container main body 14 which has flexibility and is packed with contents, and an outer container main body 12 containing the inner container main body 14 in the interior thereof, having a pressurizing chamber formed between the inner and outer container main bodies 14, 12, being expandable and contractible, and being provided with a check valve 11. The check valve 11 functions to allow air to flow into the pressurizing chamber and to check air from flowing out of the pressurizing chamber to the external side when the outer container main body 12 being in a narrow state is expanded. In addition to such a structure, a self-seal cap 20 is provided, which puts the inner container main body 14 into a shut-off condition and which allows the contents to flow out of the inner container main body 14 when the outer container main body 12 is pressed, while air is checked from flowing into the inner container main body 14 from the external side when pressing is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeeze container containing ketchup, sauce, edible oil, etc., which can be appropriately poured out. More specifically, the inner layer container body and the outer layer container body can be separated from each other. At the same time, it relates to a double structure squeeze container capable of reliably preventing the oxidation of the contents.

[0002]

2. Description of the Related Art Conventionally, there is known a laminated bottle in which an inner layer and an outer layer can be separated from each other, and only the inner layer is deformed due to the depressurization in the container to prevent the outer shape of the container from being changed.
Examples of this type of laminated bottle include, for example, JP-A-58-1.
There is one described in Japanese Patent No. 93261. The outline is as follows.

That is, in this laminated bottle, the main body of the container has a double structure of an inner side and an outer side, a pressurizing chamber is interposed between both walls, and the inner wall is formed by a flexible member having no restoring property, and the outer wall is formed. It is formed of a flexible member having a restoring property and has an air introduction hole which is provided in the outer wall and communicates with the pressurizing chamber. Further, a male screw is formed at the mouth of the outer wall, and the opening of the inner wall is closed by screwing a lid onto the male screw.

When the contents in the inner wall of the laminated bottle are pushed out, the lid is removed from the mouth of the outer wall, the mouth of the inner wall is opened, and the air introduction hole of the outer wall is sealed with a finger or the like. Press the outer surface of. Thereby, the air in the pressurizing chamber uniformly presses the periphery of the inner wall, the inner wall is deformed, and the contents are pushed out from the extrusion port. When the pressed state is released after the contents have been extruded, air flows into the outer wall through the air introduction hole, and the outer wall returns to its original shape, but the inner wall does not deform, that is, the air flows inside. By maintaining the contracted shape in the state where the temperature is suppressed, the oxidation of the content is suppressed.

[0005]

However, in the above-mentioned conventional example, although the inner wall is restored to its original shape and air is flowed into the inner wall, oxidation of the contents can be suppressed, but the lid is closed. Until the removed contents are extruded and the lid is reattached, the contents are exposed to the air through the extrusion port of the inner wall, and there is a problem that the oxidation of the contents is not sufficiently prevented. Such a problem is particularly problematic when the number of times the content is extruded from the laminated bottle is large.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a double structure squeeze container in which the main body of the inner layer and the main body of the outer layer can be separated from each other and the oxidation of the contents can be surely prevented.

[0007]

Means for Solving the Problems The present invention has been proposed to achieve the above-mentioned object, and has the following constitution. That is, according to the present invention, it is possible to expand and contract while forming a pressurizing chamber between the inner layer container body having flexibility and being filled with contents and the inner layer container body. And a pinch-off portion of the outer layer container body and a pinch-off portion of the inner layer container body are separated from each other and the pinch-off opening portion of the outer layer container body is heat-sealed to be watertight. A container body, a check valve provided in the outer layer container body and allowing a flow of air into the pressurizing chamber when the outer layer container body in a contracted state is expanded, and the inner layer container body are closed. At the same time, when the outer layer container body is pressed, the contents are allowed to flow out from the inner layer container body, and when the pressing is released, air from the outside is prevented from flowing into the inner layer container body. And,
A double structure squeeze container is provided.

According to the present invention, the squeeze container having a double structure according to claim 1, wherein the outer layer container body is formed of polypropylene or high-density polyethylene, and the inner layer container body is nylon 12 alone, Alternatively, a laminate comprising nylon 12 / acid-modified polyolefin-based adhesive resin / ethylene-vinyl acetate copolymer, or nylon 12 / acid-modified polyolefin-based adhesive resin / ethylene-vinyl acetate copolymer / acid-modified polyolefin-based adhesive resin / low A dual structure squeeze container is provided that is composed of a laminate of high density polyethylene and / or linear low density polyethylene.

[0009]

In the squeeze container according to the invention of claim 1, the container body has an inner layer container body which is flexible and is filled with contents, and an inner layer container body in which the inner layer container body is housed. It is constituted by an outer layer container body which forms a pressurizing chamber with the body and is expandable / contractible and provided with a check valve. The check valve functions to allow the inflow of air into the pressurizing chamber and prevent the outflow of air from the pressurizing chamber to the outside when the outer layer container body in the contracted state expands. .

Further, in the squeeze container according to the present invention, in addition to the above configuration, the inner layer container body is closed and the contents of the inner layer container body are allowed to flow out when the outer layer container body is pressed. The feature is that a cap is provided to prevent air from the outside from flowing into the inner layer container body when the pressure is released. When the outer layer container body of the double structure squeeze container of the present invention is pressed, the inner layer container body is pressed by the air in the pressure chamber and the cap allows the contents to flow out, and the inner layer container body is contracted and deformed. The contents are extruded from the inner layer container body. When the pressed state of the outer layer container body is released, air flows into the pressurizing chamber through the check valve, the expansion of the inner layer container body is suppressed, and the air is prevented from flowing into the inner layer container body.

Further, in the squeeze container according to the present invention, when the pressing of the outer layer container body is released, the cap is
The inside of the inner layer container body is automatically and quickly prevented from being exposed to the outside air by blocking the outside air from the inside of the inner layer container body. As described above, in the squeeze container according to the present invention, it is possible to prevent the inner layer container body from expanding and air flowing into the inner layer container body after the content is extruded by the pressurization chamber in addition to the automatic pressurization. The contents of the inner layer container main body are closed rapidly and rapidly to shut off the contents from the outside air, so that the oxidation of the contents is extremely effectively prevented. In the present invention,
Since the pump for discharging the contents to the outside is not provided, the cost of the squeeze container can be reduced accordingly.

In the squeeze container according to the invention of claim 2, the outer layer container body according to the invention of claim 1 is formed of polypropylene or high-density polyethylene, and the inner layer container body is made of nylon 12 alone or nylon 12. / Acid-modified polyolefin adhesive resin / Ethylene-
Laminate composed of vinyl acetate copolymer, or nylon 12 / acid-modified polyolefin-based adhesive resin / ethylene-vinyl acetate copolymer / acid-modified polyolefin-based adhesive resin /
It has a technical feature in that it is composed of a laminate of low-density polyethylene and / or linear low-density polyethylene.

The outer container body may be formed of a single layer of polypropylene or high-density polyethylene, or may have a structure of three or more layers in which a gas barrier resin layer is laminated via an adhesive resin layer. Polypropylene or high-density polyethylene is the most suitable material for the outer layer container body of the squeeze container according to the present invention in terms of impact resistance, elastic restoring property and the like. Also, as the material of the inner layer container body,
As described above, it is preferable to use nylon 12 in terms of moldability, but nylon 66, nylon 6 or the like can also be used.

The inner container body is made of nylon 1
Although it can be composed of two simple substances, as described above, nylon 12 / acid-modified polyolefin adhesive resin / ethylene-
Laminate composed of vinyl acetate copolymer, or nylon 12 / acid-modified polyolefin-based adhesive resin / ethylene-vinyl acetate copolymer / acid-modified polyolefin-based adhesive resin /
It is preferable to use a laminate of low-density polyethylene and / or linear low-density polyethylene in order to prevent oxygen in the pressurizing chamber from permeating into the main body of the inner layer container.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. 1 to 3 show a plastic double structure squeeze container 10 according to an embodiment of the present invention.
It is shown. The squeeze container 10 includes a container body 13, and the container body 13 is composed of an outer layer container body 12 and an inner layer container body 14 which are separable from each other. The inner layer container body 1 is formed to be thick so as to have a predetermined rigidity.
4 is formed in a flexible sheet shape. The outer-layer container body 12 and the inner-layer container body 14 have no welded portion and are in close contact with each other at their mouths.

The outer container body 12 has a bottom portion 12A,
The pinch-off opening 12D shown in FIG. 5 (a) and FIG. 5 (b) in which the portion A of FIG. 5 is enlarged is, as will be described later, after the pinch-off portion 14A of the inner layer container main body 14 has come out [FIG.
(See (c)] and is heat-sealed to form a hermetically sealed heat-sealed portion 12B [see FIG. 5 (d)]. Therefore, water and air are prevented from flowing into the outer layer container body 12 from the bottom portion 12A of the outer layer container body 12.

Further, as shown in FIGS. 1 to 3, a through hole 12C is formed in the bottom portion 12A of the outer container body 12, and the check valve 11 is fixedly inserted in the through hole 12C. ing. The check valve 11 is designed to prevent air from flowing out of the outer layer container body 12 to the outside. As a result, as shown in FIGS. The space between and functions as the pressurizing chamber 16. On the other hand, the check valve 11 allows air from the outside to flow into the outer layer container body 12 when the outer layer container body 12 (see FIG. 2) in the pressed state is released. .

In this embodiment, polypropylene is used as the material of the outer layer container body 12 and nylon 12 is used as the material of the inner layer container body 14. A self-sealing cap 20 is provided on the container body 13. As shown in FIG. 4, the self-sealing cap 20 is screwed to the mouth of the outer container body 12. The self-sealing cap 20 is the cap body 2
2 and the valve 26. The cap body 22 is made of polypropylene, and has an upper wall 22A having a substantially circular shape and an opening 22D formed in the center, and a peripheral wall 22B. A female screw 22C is formed on the inner surface of the peripheral wall 22B, and is screwed to a male screw 12E formed at the mouth of the outer container body 12.

An outer cylinder 23 and an inner cylinder 24 are hung from the upper wall 22A with a space therebetween, and a space between the outer cylinder 23 and the inner cylinder 24 is a space for mounting the valve 26. . Discharge holes 23A and 24A are formed in the peripheral wall of the outer cylinder 23 and the peripheral wall of the inner cylinder 24, respectively, so as to serve as passages for contents. A lid portion 21 is attached to the cap body 22 via hinges 20A, 20B and 20C so that the mouth portion of the container body 13 can be closed and opened. The valve 26 to which the cap main body 22 configured as described above is attached has a cup-shaped protruding portion 27A in which the central portion of the circular flat plate portion 27 projects upward, and the protruding portion 27A of the flat plate portion 27 is provided.
A cylindrical elastically deforming portion 27B is provided outwardly of the above so as to project upward in FIG. Further, outside the elastically deforming portion 27B of the flat plate portion 27, the fitting protrusion 2 is directed upward in FIG.
7C is projected.

In the valve 26 constructed as described above, the fitting protrusion 27C is fitted into the space between the inner cylinder 24 and the outer cylinder 23 of the cap body 22, that is, the inner cylinder 24.
It is attached by closely adhering to the outer surface of and the inner surface of the outer cylinder 23. In this mounted state, the lower end portion of the outer cylinder 23 extends inward, and the extended portion 23B prevents the valve 26 from coming off.

The container body 13 is manufactured as follows. That is, a laminated parison composed of the inner layer container body 14 and the outer layer container body 12 is integrally coextruded,
Mold by blow molding. Inner layer container body 14 immediately after molding
5B, the pinch-off portions 14A of the inner layer container body 14 are welded to each other, and the pinch-off portion 12F of the outer layer container body 12 is in an open state. Pinch off opening 1
The pinch-off part 14A is in a state of biting into 2D.

In this state, air is blown into the outer container body 12 from the pinch-off opening 12D, whereby
The inner layer container body 14 is in a deflated state, the outer layer container body 12 is kept in an expanded state, and the inner layer container body 14 and the outer layer container body 12 are separated from each other. In this peeled state, the pinch-off portion 14A of the inner layer container body 14 completely comes out from the pinch-off opening 12D of the outer layer container body 12 (see FIG. 5C).

Then, a through hole 12 is formed at a predetermined position of the bottom portion 12A of the outer container body 12 by a drill (not shown).
Drill C. When the through hole 12C is formed, as described above, the inner layer container body 14 is deflated,
That is, since the bottom portion 12A of the outer layer container body 12 and the inner layer container body 14 are reliably separated from each other and are spaced from each other, the inner layer container body 14 is not damaged or has a hole by a drill. Absent.

Next, the pinch-off opening 12D of the bottom 12A of the outer container body 12 is heat-sealed to form the bottom 12A.
To be watertight [see FIG. 5 (d)]. After that, air is blown into the inner layer container body 14 through the mouth to inflate the inner layer container body 14 to a complete state, and then the through hole 12
The check valve 11 is inserted in C and the check valve 11 is attached to the outer container body 12
Is fixed to the bottom portion 12A of the. Outer layer container body 1 of check valve 11
Fixing to 2 is performed by welding such as spin welding or ultrasonic waves. Thus, the manufacturing of the container body 13 is completed.

The operation of this embodiment will be described below. FIG.
As shown in, when the outer layer container body 12 of the squeeze container 10 of the present invention is pressed, the inner layer container body 14 is pressed by the air in the pressurizing chamber 16 and the inner layer container body 14 is contracted and deformed. The elastically deforming portion 27B of the valve 26 elastically deforms and separates from the inner surface of the inner cylinder 24. As a result, the contents of the discharge hole 23A
4A, through the mouth of the inner layer container body 14 and is discharged from the opening 22D of the cap body 22 (see FIG. 2).

When the pressed state of the outer layer container body 12 is released from the state shown in FIG. 2, air is forced through the check valve 11 into the pressurizing chamber 1.
6 and the air pressure in the pressurizing chamber 16 prevents the inner layer container body 14 from being restored and prevents the air from flowing into the inner layer container body 14. At the same time as this,
As shown in FIG. 3, the elastically deforming portion 27B of the valve 26 is brought into close contact with the inner surface of the inner cylinder 24, and the outside air and the inside of the inner layer container body 14 are shut off so that air is automatically introduced into the inner layer container body 14. Be blocked.

As described above, in this embodiment, air is introduced into the main body 14 of the inner layer after the contents are extruded.
In addition to the structure that prevents the inner layer container body 14 from expanding to its original shape by the pressure applied by 6,
The self-sealing cap 20 automatically and quickly closes the inner layer container body 14 to shut off the contents from the outside air, so that the oxidation of the contents is extremely effectively prevented.

In the above embodiment, polypropylene is used as the material of the outer layer container body 12, but polyethylene, polycarbonate, etc. can be used as well. Further, in the above embodiment, nylon 12 is used as the material for the inner container body 14, but nylon 66, nylon 6 or the like may be used instead. In particular, when the content is likely to be oxidatively deteriorated, nylon 12 / acid-modified polyolefin-based adhesive resin / ethylene-vinyl acetate copolymer or nylon 12 / having a gas barrier resin layer laminated via an adhesive layer is used. It is also possible to use a multilayer structure having an acid-modified polyolefin-based adhesive resin / ethylene-vinyl acetate copolymer / low-density polyethylene and / or linear low-density polyethylene.

[0029]

According to the present invention, it is possible to provide a squeeze container having a double structure capable of peeling the main body of the inner layer and the main body of the outer layer and surely preventing the oxidation of the contents.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a double structure squeeze container according to an embodiment of the present invention, showing a state where the inner layer container body is filled with contents.

FIG. 2 is a cross-sectional view showing a state in which the outer layer container body of the double structure squeeze container of FIG. 1 is in a pressed state and the contents are extruded.

3 is a cross-sectional view showing a state in which the double structure squeeze container of FIG. 2 is released from pressing.

FIG. 4 is an enlarged sectional view showing a self-sealing cap.

5A to 5D are cross-sectional views for explaining a process of heat-sealing the pinch-off opening portion of the outer layer container body.

[Explanation of symbols]

 10 Double structure squeeze container 11 Check valve 12 Outer layer container body 13 Container body 14 Inner layer container body 16 Pressurization chamber

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29L 22:00

Claims (2)

[Claims] 1. An inner layer container body which is flexible and is filled with contents, and an outer layer which houses the inner layer container body and forms a pressurizing chamber between the inner layer container body and expands and contracts. A container body, and a pinch-off portion of the outer layer container body and a pinch-off portion of the inner layer container body are separated from each other, and the pinch-off opening of the outer layer container body is heat-sealed to be watertight. A container body, a check valve provided in the outer layer container body, which allows air to flow into the pressurizing chamber when the outer layer container body in a contracted state is expanded, and the inner layer container body is closed. At the same time, when the outer layer container body is pressed, the content of the inner layer container body is allowed to flow out, and when the pressing is released, air from the outside is prevented from flowing into the inner layer container body. With a cap Dual structure squeeze container, characterized in that it comprises a. 2. The outer layer container body is formed of polypropylene or high-density polyethylene, and the inner layer container body is made of nylon 12 alone or nylon 12 / acid-modified polyolefin adhesive resin / ethylene-vinyl acetate copolymer. Laminated body or laminated body composed of nylon 12 / acid-modified polyolefin adhesive resin / ethylene-vinyl acetate copolymer / acid-modified polyolefin adhesive resin / low-density polyethylene and / or linear low-density polyethylene The double structure squeeze container according to claim 1.