JP3312119B2 - Pressurized packaging method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates is related <br/> pressurized packaging how.

[0002]

2. Description of the Related Art Various pressure packaging methods for producing a pressure packaging container by pressing a packaging container made of an aluminum laminate material or a pressure-resistant film material have been conventionally proposed. For example, (A) a method in which packaging is performed under an increased pressure to form a pressurized packaging container, (B) a method in which a solid gas or a liquefied gas is filled just before sealing, and (C) a reaction to generate gas The method is as follows: a method in which a chemical to be prepared is put in a packaging container, sealed, stirred inside and pressurized with a reaction gas, (D) a method of pressurizing using a check valve, (E) a method described in Japanese Patent Publication No. 5-36317. There is a method of applying a heat seal inside the injection hole and injecting a high-temperature gas to perform pressure sealing.

[0003]

The conventional methods as described above have the following disadvantages. In (A), the cost is high, and in (B) and (C), strict quality control and weight control of gas and chemicals are required, and quickness is required for gas insertion. Absent.
In (D), the pressure is stable, but the check valve is expensive and the cost is high. In (E), the time required for bonding varies, it is difficult to keep the pressure inside the container constant at room temperature, loss of high-temperature gas easily occurs, and sufficient care must be taken when handling the high-temperature gas. Cost. In addition, when a container is processed by changing the internal pressure in a stepwise manner without using a check valve, the process becomes very complicated and thus expensive.

Accordingly, the present invention uses a valve having a simple structure capable of changing the internal pressure stepwise by injecting a gas from the outside, and after reaching a required pressure, seals the injection hole from the outside. it allows eliminating gas leakage, to allow the permanent maintenance of the required pressure, and an object thereof is to provide a pressurized packaging how capable inexpensive pressurized packaging.

[0005]

In order to achieve the above object, a pressurized packaging method according to the present invention is characterized in that after a gas is injected from an injection hole opened in a packaging container, the injection hole is closed in a sealed state. Pressurizing packaging method of a packaging container, wherein the inner sheet piece is joined from the inner surface side of the injection hole and formed into a predetermined shape so that gas can be injected, and the semi-processed packaging is performed. After storing the object to be packaged inside the container, close the storage side opening, and then inject a room temperature pressurized gas from the injection hole to pre-pressurize the inside of the packaging container to a required pressure or less.
With the inner sheet piece pressed against the injection hole,
The packaging container is in a closed shape, and the packaging container has a predetermined shape
After performing the outer shape processing as described above,
A pressurized gas is injected to pressurize to a required pressure, and thereafter, the injection hole is closed from the outer surface side by an outer sheet piece so as to be completely sealed .

[0006]

DETAILED DESCRIPTION OF THE INVENTION hereinafter, the embodiment of the method of the present invention, with reference to the accompanying drawings, will be described in detail. FIG. 1 is a perspective view of a pressure-resistant packaging container 1 containing, for example, a tennis ball in a sealed state as a packaged object B, and FIG.
Is a wall body of the pressure-resistant packaging container 1 made of an aluminum laminate material or a pressure-resistant film material, 3 is a gas injection hole, 4 is an inner sheet adhered to the back side of the injection hole 3 so that the gas can be injected. The pieces 5 are outer sheet pieces that are bonded so as to close the injection hole 3 from the outside in a sealed state. Note that FIG.
Among them, 6 and 7 indicate adhesive layers.

[0007] As shown in FIG.
The central portion corresponding to the injection hole 3 is a non-joined portion 41 that is not joined.
No adhesive is applied to the portion, and an adhesive is applied to the joint portions 42 provided on both sides of the portion so that the portion is adhered to the inner surface of the wall 2 ( (See FIG. 2). The inner sheet piece 4 may be made of an adhesive or adhesive material. In addition, the sheet piece 4 among them,
The bonding is not limited to the bonding, and may be performed by other bonding means such as welding, fusion welding, and pressure welding.

With this configuration, when a pressurized gas (for example, air) G at normal temperature is injected from the injection hole 3 as shown in FIGS. 3 and 6, the space between the non-joined portion 41 and the wall 2 is formed. Through the inside of the pressure-resistant packaging container 1 and
When the inside of the pressure-resistant packaging container 1 reaches a predetermined gas pressure, the inner sheet piece 4 is filled with the injection hole 3 by the gas pressure.
, And the injection hole 3 can be brought into a closed state, that is, an apparently closed state.

Since the apparent closed state can be easily formed by such a simple check valve structure composed of the inner sheet pieces 4, the internal pressure of the pressure-resistant packaging container 1 can be changed stepwise. There is an advantage that various processing of the pressure-resistant packaging container 1 can be easily performed. Explaining this point, the pressure-resistant packaging container 1 before pressurization is in a flat state as shown in FIG. 8, for example. As shown in FIG. 9, the ends 11, 11 protrude, which is not preferable in appearance, and also hinders the ends 11, 11 during transportation. Sometimes you do. In addition, since the end portions 11 and 11 are bonded back to back, after a long time, the bonded portion 12 may be peeled off due to the internal pressure and a leak may occur. Reference numeral 13 denotes a vertical joint of the wall 2.

Accordingly, it is necessary to bend and weave the end portions 11, 11 along the wall 2, and in the present invention, FIG.
Through the respective working steps shown in (A) to (E), the hermetically sealed pressure-resistant packaging container 1 as shown in FIG. Each working process will be described in order. First, as shown in FIG. 7 (A), a packaged object B such as a tennis ball or the like is opened from the storage side opening 1a of the half-processed packaging container 1 formed in a single-sided shape. Are stored in a predetermined number, and the storage-side opening 1a is bonded by, for example, heat fusion, ultrasonic fusion, pressure welding, bonding, or the like, as shown in FIG. 7B.

Next, as shown in FIG. 7 (C), a gas is injected from the injection hole 3 and the pressure inside the gas is set to a relatively low pressure P ₁ , for example, 0.1 to 0, which is easy to deform. .
Pressurize until it becomes about 5kg / cm ² G. In this state, the injection hole 3 is temporarily closed by the inner sheet piece 4 and is in an apparently closed state.
As shown in (D), the end portions 11, 11 are bent and adhered along the wall 2, and finally the outer shape is adjusted. Thereafter, gas is further injected from the injection hole 3 and pressurized until the internal pressure reaches a required pressure P ₂ , for example, 1 kg / cm ² G (FIG. 7).
(E)). Note that FIG. 7E is a diagram of FIG. 7D viewed from the back side.

As described above, the pressure-resistant packaging container 1 pressurized to a required pressure is temporarily closed (apparently closed) by the inner sheet piece 4, but as it is, the filled gas G is filled with the inner gas. Leakage may occur gradually from a slight gap in the order of microns between the unbonded portion 41 of the sheet piece 4 and the wall 2. Therefore, it is necessary to completely prevent this, and when the required pressurized state (1 kg / cm ² G) is reached, the injection hole 3 is immediately sealed by the outer sheet piece 5 from the outside. , It is possible to obtain a durable pressure-resistant packaging container 1 having a good appearance as shown in FIG.

The outer sheet piece 5 may be applied by applying an adhesive to the back surface thereof and pressing the outer sheet piece 5 against the outer surface (front surface) of the wall 2 around the injection hole 3 (FIG. 2). Thus, the pressure-resistant packaging container 1 can be completely sealed. Note that the outer sheet pieces 5 are not limited to being bonded, and may be joined by other appropriate joining means. In addition, a material having adhesiveness or adhesiveness such as an adhesive tape or an adhesive tape can be used for the outer sheet piece 5.

As described above, according to the method of the present invention, the pressure-resistant packaging container 1 sealed at a required pressure can be obtained at a low cost by a simple method using an inexpensive material.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The materials constituting the wall 2, the inner sheet piece 4, the outer sheet piece 5, and the adhesive layers 6, 7 and the thickness of each material are as follows.
For example, as shown in Table 1, five types of Examples No. 1 to No. 5 were manufactured.

[0016]

[Table 1]

In each of the embodiments (No. 1 to No. 5),
Good sealing effect and durability could be obtained.

Further, for example, when the material of the wall 2 is relatively thick and rigid, and the packaging container 1 has a certain shape-retaining property from the beginning, especially in the process of increasing the internal pressure. In some cases, it is not necessary to perform the deformation processing. In such a case, the inner sheet may be completely closed by the outer sheet piece 5 when the internal pressure is continuously increased to reach the required pressure.

Further, the material of the inner sheet piece 4 adhered to the inside of the above-mentioned injection hole 3 is, for example, rubber, polypropylene, polystyrene, or the like in addition to the above-mentioned polyethylene (PE).
ABS, polyvinyl chloride, polyvinylidene chloride, vinyl alcohol copolymer resin, acrylic resin, PET, polyacetal, polycarbonate, nylon, polyimide resin, phenol resin, amino resin, epoxy resin, fluorine resin, silicone resin, polyester, heat A plastic elastomer, aluminum foil, copper foil, iron foil, SUS foil, or the like can be used. Further, for the adhesive layers 6 and 7, metaceron can be used, and for the outer sheet piece 5, nylon or the like can be used.

[0020]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, the gas G
By joining the inner sheet pieces 4 so as to cover the injection hole 3 from the inner side so that the injection can be performed, a valve structure having a simple configuration can be formed, and after the internal pressure is increased, The above-mentioned injection hole 3 is formed with an outer sheet piece 5 from the outer surface side.
To provide a sealed packaging container 1 made of an inexpensive material at a low cost because the container is closed so as to be in a completely sealed state, so that there is no gas leakage and a required internal pressure can be maintained for a long period of time. Can be.

Further , once the pre-pressurized state below the required pressure is applied, the packaging container 1 is subjected to an outer shape processing so as to have an apparently closed state so that the packaging container 1 has a predetermined shape, so that the formability of the packaging container 1 is good. Thus, the appearance can be satisfactorily finished, and the durability can be improved .

[Brief description of the drawings]

FIG. 1 is a perspective view of a sealed state showing an embodiment of a pressure-resistant packaging container of the present invention.

2 is an enlarged cross-sectional view of a main part taken along an arrow (a view corresponding to a cross section taken along line XX in FIG. 6).

3 is an enlarged cross-sectional view of a main part taken along an arrow (a view corresponding to a cross section taken along line YY in FIG. 5).

FIG. 4 is a plan view of the inner sheet piece viewed from the inner surface side (joining side).

FIG. 5 is an enlarged view of a main part of the pressure-resistant packaging container in a state where the outer sheet pieces are not joined.

FIG. 6 is an enlarged view of a main part of the sealed pressure-resistant packaging container to which the outer sheet pieces are joined.

FIGS. 7A and 7B are explanatory diagrams of a pressure packaging method, wherein FIG. 7A shows a state in which tennis balls are stored in a packaging container, FIG. 7B shows a state in which tennis balls are stored, and a storage-side opening is closed; ) Shows a state in which gas is injected, (D) shows a state in which the packaging container is molded under a pre-pressurized state, and (E) shows a state in which gas is further injected to a required pressure.

FIG. 8 is a plan view showing an example of a packaging container in an initial state.

FIG. 9 is a plan view showing an example of a packaging container when the pressure is increased to a required pressure without performing deformation processing in the process of increasing the pressure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Packaging container (pressure-resistant packaging container ) 3 Injection hole 4 Inner sheet piece 5 Outer sheet piece B Packaged object (tennis ball) G Gas

Claims (1)

(57) [Claims] 1. A pressurized packaging method for a packaging container in which a gas is injected from an injection hole opened in a packaging container and then the injection hole is closed in a sealed state, so that the gas can be injected.
From the inner surface side of the injection hole, after joining the inner sheet pieces, formed into a predetermined shape, after storing the article to be packaged inside the semi-processed packaging container, close the storage side opening, A pressurized gas at room temperature is injected from the injection hole, and the inside of the packaging container is pre-pressurized to a required pressure or less, and the inner sheath is filled.
The test piece was pressed against the injection hole and apparently closed.
Then, shape the packaging container so that it has the specified shape.
After that, pressurized gas at room temperature is injected through the injection hole.
A pressurized packaging method comprising pressurizing to a pressure required, and thereafter closing the injection hole from the outer surface side so as to be completely sealed with an outer sheet piece.