JP2708685B2 - Manufacturing method of packaged sealed food - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of energizing and heating liquid foods containing solids such as vegetables or liquid foods such as soups, and storing and storing the foods after heating. The present invention relates to a method for producing a package-sealed food product for producing a package-sealed food product.

[0002]

2. Description of the Related Art In general, retort heating is a typical method for heating liquid foods containing solids such as vegetables for sterilization or cooking, but retort heating requires only a long time for processing. In addition, there are problems such as low energy efficiency and poor taste. Therefore, in recent years, energization heating has attracted attention. The energization heating utilizes what is called Joule heat, in which an electric current is directly applied to a food material to generate heat by electric resistance of the food. Such electric heating has advantages such as high energy efficiency, high processing efficiency, and easy uniform heating. By the way, when applying electric heating to a food material, it is necessary to bring the electrode plate into electrical contact with the food material. On the other hand, in order to ship and store foods sterilized by energized heating as they are on the market, it is desired to perform energized heating in a state in which the food material is sealed in a packaging bag or container.

[0003] Therefore, in Japanese Patent Application Laid-Open No. 63-207371, etc., food is packaged with a packaging film having moisture permeability.
It has been proposed that the electrode plate is pressed from the outside to carry out electric heating. In the case of this method, the packaging film is moistened by the food material having a high moisture content, thereby imparting conductivity to the packaging film. As a result, an electric current flows from the electrode plate to the food material inside through the packaging film to generate Joule heat.

However, in a food packaged using such a moisture-permeable packaging film, moisture may permeate the packaging film even during storage after electric heating, which may cause the growth of microorganisms or the like. Is unsuitable for storage. In order to solve this problem, it is conceivable to further package the outside of the moisture-permeable packaging film with a moisture-impermeable packaging after heating by energization. However, in that case, a great deal of labor and time are required.

On the other hand, Japanese Patent Application Laid-Open No. 63-207369 proposes a sealed packaged food which can be stored for a long time while being sterilized by heating with electricity. This covers the current-carrying plate with a moisture-permeable membrane or a moisture-containing electrical conductor and a moisture-permeable membrane, places it in an insulating bag, and ties it tightly. In this state, the current-carrying plate is put on the market as a packaged food or the like while being inserted. In this case, the outer package does not need to be permeable to moisture, and can be stored for a long time.

[0006]

SUMMARY OF THE INVENTION The aforementioned Japanese Patent Application Laid-Open No. 63-20736
In the case of Gazette No. 9, there are the following problems. That is, it is not preferable that the wet electrical conductor remains in the completed packaged food because it gives a foreign-body sensation and an unpleasant sensation when the packaging bag is opened to serve the packaged food to the table. The present invention has been made in view of the above-described problems of the related art, and it is possible to perform energization heating in a state where a food material is sealed and packaged, and to store food as it is with an electrode removed. It is an object of the present invention to provide a method for producing a low-cost packaged sealed food product.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a package formed of an insulating thin film and having a food storage space therein, and a connecting portion exposed on the outer surface of the package. A step of forming an energizing bag with at least two electrode members having an energizing portion exposed in the food accommodating space and provided at a distance from each other, and after filling the food accommodating space with food. A step of sealing the energization bag, and a step of connecting a power source to the connection portion of the electrode member, supplying a voltage via the food between the energization portions, and heating the food with Joule heat, A step of sealing the package at a portion inside the electrode member, and a step of separating a portion including the electrode member of the current-carrying bag from a portion of the package, It is a manufacturing method.

[0008]

After the food to be heated is stored in the food storage space in the current-carrying bag, the current-carrying bag is sealed. In this state, a power source is connected to at least two electrode members provided on the energizing bag, and the food is heated by generating Joule heat in the food. In this way, the food can be heated using the electrode member of the current-carrying bag. When the heating is completed, the insulating thin film is joined at a portion inside the electrode member, thereby forming a package in which food is contained. Next, a part including the electrode member of the energizing bag is separated from a part of the package. Thus, contact between the food and the electrode member is avoided, so that a thin metal plate can be used as the electrode member, and the food can be heated and packaged at low cost.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for producing a package-sealed food according to the present invention will be described in detail with reference to the illustrated embodiments.
FIG. 1 is a view showing each step of the manufacturing method of the present invention.
(A) shows a state in which the energizing bag is formed. This state is also shown in FIG. 2, and the illustrated energizing bag 10a
A flat first insulating thin film 11 made of an insulating material;
Similarly, the package 10 has a food storage space 13 formed therein by a second insulating thin film 12 made of an insulating thin film and having a cross section in a tray shape.

At both ends of the package 10, conductive thin films, that is, electrode members 14, 15 are sandwiched between the first insulating thin film 11 and the second insulating thin film 12 so as to be separated from each other. Have been. As described above, the energizing bag 10a is formed by the package 10 and the two electrode members 14 and 15, and the respective electrode members 14 and 15 are formed as shown in the drawing.
Connection portions 14a and 15a exposed on the outer surface of package 10
And the current-carrying portions 14b and 1 exposed in the food accommodation space 13.
5b.

The materials of the insulating thin films 11 and 12 are polyethylene (PE) and polypropylene (P
P), polyvinylidene chloride (PVDC), polyethylene terephthalate (PET), polyamide, polyester, eval and the like can be used. In addition, as the material of these thin films 11 and 12, a single layer material or a laminated multilayer structure may be used.
In the case of a single layer, P itself has heat sealing properties.
It is preferable to use E, PP, or the like. In the case of a laminate, it is desirable to use a material having heat sealability on the inside, use a material having strength and printability on the outside, and further use a material having low moisture permeability or gas permeability as an intermediate layer as necessary. . Examples of such a multilayered film material include a combination of polyamide and PP, and a combination of PET, polyamide and PP. On the other hand, a metal plate, a conductive resin, or the like is used as the electrode members 14 and 15.

In the state in which the energizing bag 10a is formed as described above, an opening 16 is provided in a part thereof as shown in FIG. 1
Three sides of Oa are closed and only one side is open. Through the opening 16, the food container 13 is filled with a liquid food containing solid matter such as vegetables or a food 17 such as soup. However, an opening 16 may be formed in a part of one side after sealing a substantial part of the one side, and an opening may be formed in the other two sides by sealing only two sides. You may do it.

FIG. 1B shows a state in which the filling is completed.
It is as follows. In this state, the first insulating thin film 11 and the second insulating thin film 12 in the portion of the opening 16 are joined to each other to seal the current-carrying bag 10a. FIG. 3 shows the sealed state. This bonding is performed by applying heat while the thin films 11 and 12 are in close contact with each other, thereby performing thermal fusion.

FIG. 1C shows a pair of two electrode members 1.
The state where the power supply 21 is connected to the connection portions 14a and 15a of Nos. 4 and 15 is shown. When a voltage is supplied to the two electrode members 14 and 15 in this state, a current flows through the food 17 between the energized portions 14 b and 15 b exposed in the food storage space 13, and Joule heat is generated in the food 17. The food 17 is heated and sterilized. A high frequency is used as a voltage supplied to each of the electrode members 14 and 15. When electricity is supplied, the food bag 1a is placed in a pressurized container pressurized to a pressure equal to or higher than the atmospheric pressure.
7 can be heated to 100 ° C. or higher.

Next, as shown in FIG. 1D, the first insulating thin film 11 and the second insulating thin film 12 constituting the package 10 are connected to the connection portions 22 inside the electrode members 14 and 15.
And the package 10 is sealed by heat fusion. Further, as shown in FIG.
A portion including the electrode members 14 and 15 of the both ends of Oa, that is, the current-carrying bag 10a is separated from the portion of the package 10 at a cutting line 23 using a cutting machine or a cutter.
FIG. 1E is a view showing a state in which the separation is completed. In this state, the food can be transported, sold, and stored. Thus, after the end of the energization, the electrode members 14, 15
Is cut off from the portion of the current-carrying bag 10a, and when the food is carried or stored, contact between the electrode members 14, 15 and the food is avoided. Therefore, metallic members are used as the electrode members 14, 15. Even if the electrode members 14 and 15 do not affect the food 17, the food can be stored in the package for a long time.

FIGS. 4A and 4B are views showing another embodiment of the current-carrying bag 10a. In this case, one of the first insulating thin film 11 and the second insulating thin film 12 has Electrode member 14,
15 are provided integrally. That is, the two electrode members 14 and 15 are adhered to the first insulating thin film 11, and the first insulating member 11 and the second insulating thin film 12 in which the electrode members 14 and 15 are integrated form a current carrying bag. A body 10a is formed. Therefore, in this case, after the energization of the food is completed, the both ends of the energization bag 10a are separated from the portions inside the electrodes 14 and 15, that is, the cut line 23 in FIG. 4B. . FIGS. 5A and 5B are diagrams showing still another energizing bag 10a. In this case, two insulating thin films 11 and 12 forming the energizing bag 10a are shown.
Each has a tray shape when food 17 is filled, and electrode members 14 and 15 are attached to the respective conductive thin films 11 and 12. In this case, similarly to the above-described respective embodiments, after the food is filled in the food storage space 13, the food 17 is electrically heated using the two electrode members while the energizing bag 10a is sealed. After the energization is completed, as shown in FIG. 5B, the conductive members 14 and 15 are separated from the package 10 together with the end of the energization bag 10a.

Each of the conductive thin films 11 and 12 is 1
It may be formed by using two conductive sheets and folding the sheet into two. Even in that case,
When the food 17 is filled, both thin films 11, 12 are spread out in a tray shape. In addition, the size and shape of the energizing bag 10a and the package 10 are not limited to those in the above embodiment, and can be set to various sizes and shapes. The number of the electrode members 14 and 15 is also reduced to two. The number is not limited and can be set to an arbitrary number according to the size of the energizing bag 10a.

[0018]

As described above, according to the present invention, it is possible to electrically heat food in a state where the food is sealed and stored in the internal food storage space using the current-carrying bag. After that, by removing the electrode member portion of the current-carrying bag, the food is contained in a package consisting of only the conductive thin film, so that the type of food sealed in the package can be easily prepared. Not only can be manufactured to
Even when a metal member is used as the electrode member, the electrode member does not come into contact with the food during storage, so that the influence of the electrode member on the food can be prevented. Further, the effect of improving the taste can be obtained.

[Brief description of the drawings]

FIG. 1 is a process diagram showing each step of the method for producing a packaged sealed food of the present invention,

FIG. 2 is a perspective view showing a state in which a current carrying bag is formed;

FIG. 3 is a perspective view showing a state in which the current-carrying bag is sealed after food is filled in the current-carrying bag;

FIG. 4 is a cross-sectional view showing a current-carrying bag according to another embodiment and a package after an electrode member is removed,

FIG. 5 is a sectional view showing a current-carrying bag and a package after an electrode member is removed according to still another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Package, 10a ... Bag for electricity supply, 11 ... 1st insulating thin film, 12 ... 1st insulating thin film, 13 ... Food accommodation space, 1
4, 15 ... electrode member, 14a, 15a ... connection part, 14
b, 15b: energized part, 17: food.

Claims (1)

(57) [Claims] 1. A package formed of an insulating thin film and having a food accommodating space therein, a connection portion exposed on an outer surface of the package, and an energizing portion exposed in the food accommodating space. Forming a current-carrying bag with at least two electrode members provided apart from each other; sealing the current-carrying bag after filling the food storage space with food; A step of connecting a power source to the connection portion, supplying a voltage between the energizing portions via the food, and heating the food by Joule heat, and sealing the package at a portion inside the electrode member. A method of manufacturing a package-sealed food, comprising: a step of separating a portion including the electrode member of the current-carrying bag from a portion of the package.