JPH09240746A - Food pack and packaging method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a food pack and the packaging method in order to package a food in such a manner that the initial state of the food can be kept for a long period of time. SOLUTION: For this food pack, a first packaging part is constituted of an external container 1, and the food pack has a certain degree of hardness so that it can withstand an external pressure and a negative pressure of the inside, and has art oval shape, a rugby ball shape or a fish body shape as shown in the illustration, and has a hole for the discharging of air at one location. Also, an internal bag 2 as a second packaging part is for the housing of a content 5 such as a food and others in the inside 4, and the inside 4 of the internal bag 2 is kept at the atmospheric pressure as is, or an appropriate amount of a gas (nitrogen gas, etc.) is filled. In addition, after housing the internal bag 2 in the inside 3 of the external container 1, the inside 3 is vacuumized by removing air through the hole 6 for the discharging of air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a food pack for packaging the initial state of food so that it can be retained for a long time, and a packaging method thereof.

[0002]

2. Description of the Related Art Conventionally, when selling food such as side dishes to be served on a table, for example, fresh food such as raw fish, processed food such as eel kabayaki, omelet, and grilled fish, styrofoam or the like is used in order to prevent deformation. A method of storing food in a resin-molded container, covering the container with an extremely thin resin film from the open side, and sealing it is generally adopted. At the time of this sealing, a method of simply wrapping with a resin film in the air atmosphere (mainly when there is no concern about water leakage) or a method of crimping and sealing with a slightly hard resin sheet like a lid (mainly there is a risk of water leakage) , Etc.) are adopted.

[0003]

However, in the above-mentioned conventional food packaging method, when the food is non-frozen and not sealed, the number of preservation days is limited and
Water retained during processing and packing evaporates over time (days), and the freshness of some products is likely to be impaired.

Further, when the product is packaged without using a hard material such as Styrofoam, the product inside tends to lose its shape.
Further, even when a stiff wrapping product such as Styrofoam is used, only about half of it is covered with the soft resin film, so that it is likely to be crushed by an external impact or the like, and the commercial value is likely to be reduced.

[0005] Therefore, an object of the present invention is to provide a food pack and a packaging method for the food pack, which can maintain the original condition of the product.

[0006]

A structure for realizing the object of the invention according to the present application is, as in claim 1, a first wrapping part having a shape capable of withstanding atmospheric pressure and a vacuum inside.
A second wrapping section for storing food and other contents is provided in the vacuum inside the first wrapping section, and the inside of the second wrapping section is filled with air, an inert gas or other gas. Then, the pressure is set to 1 atm.

According to a second aspect of the present invention, the first wrapping portion has any one of an egg type, a rugby ball type, a spherical basket type and a fish body type.

As described in claim 3, these structures are provided with the first wrapping portion having sufficient strength against the pressing force from the outside and the negative pressure of the inner chamber after sealing, and the first wrapping portion is provided. A second wrapping part formed by forming a film by laminating the periphery of the wrapping part except for one part by heat fusion or other adhesion is provided, and food and other contents are put in the second wrapping part. From the packaging method of inflating the inside of the second packaging part by vacuuming or depressurizing one part inside the first packaging part after filling the periphery of the contents with air or an inert gas or the like It will be.

According to these configurations and packaging methods, foods and other contents have a positive pressure (1 atm) inside,
It has a negative pressure on the outside so that it does not collapse, and it can withstand external forces and shocks, and has a heat insulating effect due to the vacuum portion outside the contents.

Further, in the invention according to claim 4, the inside is filled with food and other contents in the atmosphere of air, an inert gas or other gas, and the outside is laminated with a film of upper and lower two sheets. 1 forming the packaging part, this 1st
The upper and lower peripheral parts of the packaging part are reinforced with two sets of elastic tubes that are filled with air and expanded, and an outer film is attached to each of the upper and lower surfaces of these tubes to move the second packaging part up and down. And a method of expanding the inside of the first packaging part by negative pressure by decompressing the inside of the upper and lower second packaging parts, and by having these methods and configurations, In addition to its function, it can withstand external forces and shocks.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view showing a structure of a food pack according to a first embodiment of the present invention and a packaging process thereof. In FIG. 1, reference numeral 1 denotes an outer container which constitutes the first wrapping portion and has a certain degree of hardness so as to withstand external pressure and internal negative pressure. As shown in the figure, an egg type, a rugby ball type, or a fish body type. And has a hole 6 for exhausting air at one location. Further, the inner bag 2 as the second packaging part is for accommodating foods and other contents 5 in the inside 4,
The inside 4 of the inner bag 2 is filled with the atmospheric pressure as it is or with an appropriate amount of gas (such as nitrogen gas).

Further, after the inner bag 2 is housed in the inner portion 3 of the outer container 1, the inner portion 3 is evacuated through the evacuation hole 6 to be evacuated.

With the above structure, the inner bag 2 is inflated due to the negative pressure in the inside 3 of the outer container 1, the contents 5 are protected like a cradle, and are not crushed. In addition, since the inside 3 of the outer container 1 is vacuum, it also has a heat insulating effect.

FIG. 2 is a perspective view showing a second embodiment of the present invention, in which a thin film having a thickness of several mm is molded to form a half 10a of an egg shape, a rugby ball shape or a fish body shape. , 10b, and these 10a, 1
0b are pasted together by a known adhesive means such as heat fusion,
The outer container 10 that is the first packaging portion is formed.

The shape of the inner bag for containing food and other contents, the state of the inner bag, and the point that the inside of the outer container 10 is evacuated through the exhaust hole, its action, effect, etc. are the same as those of the first embodiment. Since it is the same as the form, it will not be illustrated and described.

FIG. 3 is a perspective view showing a third embodiment of the present invention, which has the same shape as the outer container (egg type, fish type, rugby ball type) shown in the first embodiment. Outer container 1
00 is preliminarily divided into halves 100a and 100b, and these outer halves 100a and 100b are pasted together by a known bonding means such as heat fusion to form the outer container 100 which is the first packaging part. To do.

The shape of the inner bag for containing foods and other contents, the internal condition, and the point that the inside of the outer container 100 is evacuated through the exhaust hole, its action and effect are the same as those of the first embodiment. Since it is the same as the form, it will not be illustrated and described.

FIG. 4 is a perspective view showing a fourth embodiment of the present invention. Basket-like half-divided containers 1000a and 1000b made of a material having a certain hardness such as metal, wood, and resin.
Is formed and is wrapped with a film from the outside of the half-divided containers 1000a and 1000b. After that, the two half-divided containers 1000a and 1000b are pasted together by a known bonding means such as heat fusion to form the outer container 1000 which is the first packaging part.

Further, the shape of the inner bag for containing foods and other contents, the state of the inner bag and the point that the inside of the outer container 1000 is evacuated through the exhaust hole, its action and effect are the same as those of the first embodiment. Since it is the same as the form, it will not be illustrated and described.

FIG. 5 is a perspective view showing a fifth embodiment of claim 4 of the present invention, which is an inner film 23, 24 of two sheets.
Is used to cover the food or other contents 5 in the atmosphere of air, an inert gas, or other gas to form the first packaging portion 30 in which the two inner films 23 and 24 are bonded together. A frame is formed and reinforced by the air tubes 20 and 21 which are pipes around the upper and lower sides of the packaging part, and two outer films 22 and 25 are respectively provided on the upper surface of the air tube 20 and the lower surface of the air tube 20. The second wrapping portion 31, which is pasted together,
It is possible to inflate the inside of the first wrapping portion 30 by forming the upper and lower portions 32 and depressurizing the inside of the second wrapping portions 31 and 32 to a negative pressure through the exhaust holes (not shown). it can.

The air tubes 20 and 21 are inflated by introducing air into them.
The first packaging unit 30 is protected by 21.

Although the embodiments of the present invention have been described above, the contents to be packaged are not limited to foods, and any articles whose shape is easily broken can be stored, which causes the shape to collapse. Can be prevented.

[0024]

As described above, claim 1 of the present invention is provided.
According to the inventions of (1) to (3), the inside of the inner bag, which is the second packaging part that stores foods and other contents, is positive pressure and the outside is vacuum to make negative pressure. As a result, the contents will not be crushed and will be held in the cradle, not only withstanding external forces and impacts, but also because the outside is in a vacuum state, it has a heat insulating effect, and the contents have the advantage of not easily corroding. .

According to the invention described in claim 4, in addition to the effects described in claims 1 to 3, since the periphery is reinforced by the tube in which air is enclosed, it is lightweight and flexible. Strong against external force and shock.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a structure of a food pack according to a first embodiment of the present invention and a packaging process thereof.

FIG. 2 is a perspective view showing a second embodiment of the present invention.

FIG. 3 is a perspective view showing a third embodiment of the present invention.

FIG. 4 is a perspective view showing a fourth embodiment of the present invention.

FIG. 5 is a perspective view showing a fifth embodiment according to claim 4 of the present invention.

[Explanation of symbols]

 1,10,100,1000 Outer container 2,30 Inner bag 3 Inside of outer container 4 Filling gas 5 Contents 22,25 Outer film 23,24 Inner film 31,32 Outer container 20,21 Air tube

Claims (4)

[Claims] 1. A first packaging part having an external shape capable of withstanding atmospheric pressure and a vacuum inside, and a first packaging part for storing food and other contents in a vacuum inside the first packaging part. A food pack, characterized in that a second wrapping portion is provided, and the inside of the second wrapping portion is filled with air, an inert gas or other gas to have a positive pressure. 2. The food pack according to claim 1, wherein the first packaging part is any one of an egg type, a rugby ball type, a spherical basket type, and a fish body type. 3. A first packaging part having sufficient strength against an external pressing force and a negative pressure in the inner chamber after sealing,
A second packaging part formed by forming a film by laminating the periphery of the first packaging part except for one place inside by heat fusion or other adhesion is provided, and food and other contents are provided inside the second packaging part. After filling the contents and filling the periphery of the contents with air, an inert gas, or the like, by vacuuming or depressurizing one part inside the first packaging part, the inside of the second packaging part is expanded. A method for packaging a food pack, which is characterized in that 4. The inside is filled with food and other contents in an atmosphere of air, an inert gas or other gas, and the outside is formed by laminating two upper and lower films to form a first packaging part, The upper and lower peripheral portions of the first wrapping portion are reinforced by two sets of elastic tubes that are filled with air and expanded, and an outer film is attached to each of the upper surface and the lower surface of the tubes to form the second wrapping. A method for packaging a food pack, characterized in that the inside of the first packaging section is expanded by a negative pressure generated by decompressing the inside of the upper and lower second packaging sections.