JP2003212213A - Gas flush sealing method and package using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas flush sealing method wherein a packaging container having at least one air way, the container and the lid 1 of which are sealed hermetically, is placed in a chamber to carry out deaeration and gas flushing by using the air flow path and after the gas flushing the air flow path is closed, while conventional technology for the gas flush sealing method is a method that a gas flush filling is performed using a gas blowing inlet and a gas discharging outlet on the lid of a packaging container, and the packaging container is packed by a heat shrinkable film having a gas barrier property or a method that after gas flushing in a chamber a gas flush sealing is performed using a sealing form tool. <P>SOLUTION: The gas flush sealing method is carried out by placing the packaging container having at least one air flow path, the container and the lid of which are sealed hermetically, in the chamber to carry out deaertion and gas flushing by using the air flow path and closing the air flow path after the gas flushing. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas displacement sealing method for sealing a packaging container containing contents such as food and a package thereof.

[0002]

[Prior Art] In addition to the conventional form of purchasing foodstuffs at supermarkets and cooking and eating the purchased foodstuffs at each home, there is no time for cooking because of working together recently With the intention of doing household chores simply because of wanting to take them, with regard to cooking, there is an increasing number of ways to purchase pre-prepared food prepared in the backyard of a supermarket or central kitchen and eat it at home. . On the other hand, in cooked foods at supermarkets and convenience stores, product development tailored to taste, quantity, etc. of individual foods has been actively promoted to sell convenience of cooked foods, and various kinds of foods are put on the market. Has been done. Even for products of the same type, supermarkets and convenience store companies can maximize the display effect by maximizing the display effect by changing the shape and design of the packaging container. Containers of various sizes and shapes are on the market.

Particularly in the field of prepared foods, it is not the conventional large-scale sale of the same product, but recently, the desired amount of prepared foods to be eaten (a small number of people or an amount suitable for one-time eating) and seasoning (Kyo-flavoring) Etc.) is becoming available. In addition, in order to maximize the display effect in terms of design, the color of the container is changed for each food, and the market is flooded with containers of various sizes, shapes, and colors. Therefore, for prepared food sellers such as supermarkets and convenience stores, it is complicated to switch the device when packaging foods in small quantities and many kinds, and the production efficiency is reduced due to the complexity. However, the complexity of parts management of the packaging machine has been a problem.

In order to solve this problem, prepared food sellers such as supermarkets and convenience stores extend the life of prepared foods such as prepared foods and reduce the expiration date (so-called loss) of products.
We are seeking to improve productivity by reducing production brand switching. As a method for storing products for a long period of time, so-called gas displacement packaging in which foods are stored under a gas atmosphere suitable for the same has been known and studied. The gas replacement packaging of the food will prolong the shelf life of the product, so it is expected that the production efficiency will be improved by extending the distribution of the product over a long distance and reducing the products whose shelf life has expired.

Various gas replacement packaging methods have been studied in the past. For example, JP-A-9-2956
Japanese Patent Publication No. 77 is characterized in that it comprises a tray portion on which contents are placed and a lid portion covering the tray, and a gas inlet is provided on the top surface of the lid and a gas outlet is provided around the lid. There is disclosed a gas filling and packaging method in which a heat-shrinkable film having a gas barrier property is used to cover the entire circumference using a tray for gas filling and packaging. In this gas filling and packaging method, the gas blown from the gas blowing port provided on the top surface of the lid is exhausted from the exhaust port provided around the lid, so the air staying inside the tray with lid is Is excellent in that it can be replaced with gas.

Further, in Japanese Patent Laid-Open No. 4-189721, there is an insulating base plate in which a heating element is arranged at the edge of several holes formed in a plate-like body, and a flange portion of a container is provided on the plate-like body. The container is arranged correspondingly, the contents are inserted, the backing (cover) is covered, it is conveyed by the conveyor device, and then the pressing plate descends from the top to clamp the flange part up and down and heat it. There is disclosed a method of heat-sealing a container and a mount (lid) with a mold of the sealing device. In order to obtain a hermetically sealed package with gas replaced by performing the above sealing method with a packaging container containing the contents in the chamber and performing gas replacement, once the inside of the chamber is evacuated and then the gas is introduced into the chamber. It is excellent in that the air in the packaging container can be reliably replaced.

However, the method typified by Japanese Patent Laid-Open No. 9-295677 discloses a gas injection port on the top surface of the lid.
This is a method of flushing the gas into the packaging container by providing a gas outlet around the lid, so that the replacement is performed when the space in the packaging container is replaced with the gas as compared with a chamber in which the gas is once evacuated to replace the gas. There is a problem that the rate becomes low,
Depending on the shape of the contents, it is not possible to replace the oxygen contained in the contents with a gas, so the gas replacement rate in the container will be low, and the storability of the contents will be reduced. Is covered with a heat-shrinkable film having a gas barrier property, the heat-shrinkable film having a gas barrier property is easily ruptured by cutting the gas blowing port or the gas discharge port on the top surface of the lid, and the filled gas In addition to the problem that the container leaks, the container and lid are double-wrapped with heat-shrinkable film with gas barrier properties, and the packaging material used for packaging is large, so the burden on the operator based on the Container Recycling Law is large. There are still problems.

On the other hand, a gas replacement method using a sealing method represented by Japanese Patent Laid-Open No. 4-189721 discloses a container 2 and a lid 1.
The gas is replaced by using the gap of (2), and it is necessary to seal the container 2 and the lid 1 in the chamber after the gas replacement. For this reason, a heating element corresponding to each of a wide variety of containers having different sizes and designs is provided, and an expensive seal-type tool having a pressure resistant specification capable of responding to changes in the atmospheric pressure in the chamber is required. There is a problem that a large amount of cost is required to manufacture a dedicated seal mold for each container, and it takes time and labor to replace them, and it is difficult to store and manage them. In this way, the burden on the trader is considerable, both financially, in terms of location and personnel, and there is a problem that it is not possible to deal with various types of containers that are becoming more and more diversified in the future.

[0009]

SUMMARY OF THE INVENTION The present invention provides a sealing method capable of accommodating diversifying containers of various sizes and shapes and achieving a high gas replacement rate, and a package thereof. The purpose is to do.

[0010]

The present inventors have completed the present invention as a result of intensive studies to achieve the above object. That is, the present invention is as follows. 1) After the contents are contained in a packaging container using a container and a lid, the container is covered and sealed while leaving at least one air passage, and the packaging container is placed in a chamber,
A gas replacement sealing method comprising degassing the inside of a chamber and replacing the gas inside the chamber to close the ventilation passage. 2) The gas displacement sealing method according to 1) above, wherein the container and the lid contain a gas barrier material. 3) The gas displacement sealing method according to claim 1 or 2, wherein the ventilation passage is closed with an adhesive tape containing a gas barrier material. 4) A package packaged by using the gas displacement sealing method according to any one of 1) to 3) above.

The present invention will be described in detail below. The difference between the present invention and the prior art is that the prior art provides a gas inlet and a gas outlet on the top surface of the lid to flush the gas into the packaging container and fill the gas with a heat having a gas barrier property. After the gas replacement and sealing method of covering with a shrinkable film or gas replacement in the chamber, a heating element corresponding to each container is arranged for each of various containers of different sizes and designs, and the pressure inside the chamber is changed. In contrast to the gas displacement sealing method that uses an expensive sealing mold having a pressure resistant specification that can respond to changes in the above, the sealing method of the present invention stores the contents in a packaging container using a container and a lid, and In the state where at least one air passage is left, a container and a packaging container whose lid is sealed in advance are used, the packaging container is installed in the chamber, and the inside of the chamber is degassed and gas is replaced by gas. Perform deaeration and gas replacement packaging container via the gas passage, a gas replacement sealing method for closing the vent path after the gas replacement.

The effect based on the constituent elements of the present invention, which is different from the above-mentioned prior art, is that the air contained in the space or the contents of the packaging container is desired as compared with the gas flush method of gas replacement. Gas can be replaced at a high replacement rate,
Since the heat-shrinkable film can be hermetically sealed without being required, the amount of packaging material used is small and the burden on the business operator based on the Container Recycling Law can be reduced.
Since the container and the lid are sealed in advance, an expensive seal tool with pressure resistance is not required, and a general seal tool can be used. Air passage 3 even more gas replacement in the chamber in the container of any shape since it does not depend on the packaging container shape
If there is such gas, gas replacement can be performed, and after the gas replacement, it is sufficient to block the ventilation passage. Therefore, it is not necessary to manufacture an expensive seal mold having pressure resistance specifications in which heating elements corresponding to each of which are required for sealing in the chamber of the conventional technology are manufactured, and a large amount of manufacturing cost related to the dedicated seal mold is required. It is possible to reduce the time and labor for exchanging these and these, and the burden of storage and management of the seal mold, and to solve the problem that it is not possible to cope with various types of containers that will become more and more diversified in the future.

The present invention will be described in more detail below. The contents in the present invention are mainly foods, and in addition to fresh fish called 3 fresh products, raw meat, and raw vegetables, side dishes (boiled, grilled, steamed, stir-fried) sold at supermarkets, convenience stores, and the like, Examples include lunch boxes. The packaging container according to the present invention will be described. The packaging container referred to in the present invention refers to a form using a container 2 and a lid 1, and the container 2 referred to in the present invention is a container for containing the contents, and the material may be any as long as it can contain the contents. , Plastic, metal, wood, paper, and other simple substances, or laminated layers of the above materials. The lid 1 according to the present invention is
It covers the upper part of the container 2, and any material may be used as long as it can cover the container 2 containing the contents, and examples thereof include plastic, metal, wood, paper, and other simple substance or lamination of the above materials. The lid 1 that covers the upper portion is preferably transparent from the viewpoint of visually confirming the contents, and is preferably plastic that is transparent and excellent in gloss from the viewpoint of beauty. Further, it is more preferably made of the same material as that of the container 2 from the viewpoint of separation and recovery, and further preferably gas barrier plastic from the viewpoint of preventing gas dissipation.

Further, the container 2, the lid 1 and the adhesive seal 4 used in the present invention preferably contain a gas barrier material from the viewpoint of preventing the dissipation of gas. A container 2 made of a film or a sheet containing a gas barrier plastic, a metal, or a metal thin film as a gas barrier material used in the present invention,
The lid 1 and the adhesive seal 4 are mentioned. More preferably, it is a gas barrier plastic that does not generate sparks due to collision of electron beams when the microwave oven is heated. Further, the container 2, the lid 1 and the adhesive seal 4 used in the present invention preferably have a gas barrier property, but the gas barrier performance may be appropriately selected depending on the kind and amount of the contents, the quality retention period and the like. In the case of short-term storage, etc., a container 2 made of a film or sheet having no gas barrier property, a lid 1
In some cases, the adhesive seal 4 may only need to be properly selected as long as it is hermetically sealed so that the displacement of the replacement gas can be suppressed.

The term "gas barrier plastic" as used in the present invention means a plastic having a gas barrier property, and usually has a carbon dioxide gas permeation rate of 1.0 to 4935.0 ml / m.
² · day / MPa (0.1 to 500 cc / m ² · 24h
r · atm), oxygen gas permeation amount is 1.0 to 19744.0
ml / m ² · day / MPa (0.1 to 200 cc / m ²
・ 24 hr ・ atm), nitrogen gas permeation rate is 1.0-14
80.5 ml / m ² · day / MPa (0.1-150
cc / m ² · 24 hr · atm),
Examples thereof include those using generally known gas barrier plastics such as polyamide, ethylene vinyl alcohol copolymer, vinylidene chloride, and films and sheets coated with vinylidene chloride. Specifically, a stretched or unstretched film made of polyamide, polyethylene terephthalate, polyvinylidene chloride, ethylene vinyl alcohol copolymer, homopolymer or copolymer mainly composed of unsaturated nitrile such as acrylonitrile or methacrylonitrile. Examples thereof include a single layer using these resins, a lamination of the above resins, a lamination with other resins such as polyethylene, and a surface treatment such as a barrier coat of vinylidene chloride.

The packaging container referred to in the present invention may have any shape as long as the contents can be contained in the packaging container. Examples of the shape of the packaging container include a rectangular parallelepiped shape, a cylinder shape, a cone shape, a polygonal shape, a polyhedron shape, a cylindrical shape and the like, and a combination thereof. Further, in terms of the height between the container 2 and the lid 1, it is preferable that the height of the container 2 is lower than the height of the lid 1 covering the upper part, from the viewpoint of exerting a volume feeling of the contents by the display effect of the packaging container.

The ventilation passage 3 in the present invention means the container 2 and the lid 1.
Shows a hole through which gas can flow in and out of the sealed packaging container, not the gap between the container 2 and the lid 1 in the conventional gas replacement method using a chamber. Further, the size, shape, number, etc. are not a problem as long as gas can move in and out of the packaging container, but the ventilation passage 3 according to the present invention is preferably provided in the lid 1 for ventilation after gas replacement. It is preferable from the viewpoint of preventing the outflow of the juice when the passage is easily blocked and the contents contain the juice.

In the conventional gas replacement method using a chamber, before the container 2 and the lid 1 are sealed, degassing and gas replacement are performed in the packaging container from the edge of the container where the container 2 and the lid 1 are overlapped. Such prior art methods include container 2 and lid 1.
Container 2 using a mold that matches the shape of the container when sealing
It is necessary to heat-seal or adhesively seal the edges of the containers with which the lid 1 and the lid 1 are overlapped with each other, and a mold corresponding to each of various containers having different shapes, sizes and designs of the packaging containers is required.

Moreover, in order for the mold to move in such a chamber, electric and compressed air wirings for transmitting the power for moving are required. These wirings are degassed by evacuating the chamber during gas replacement. It is necessary to have a pressure resistant structure for gas / gas replacement. There is a problem in that it takes a lot of money to manufacture a dedicated seal form for each chamber or container equipped with such a wiring having a pressure resistant structure, and it takes time and labor to replace them, and they are stored and managed. Is getting harder.

As described above, the burden on the trader is considerable in terms of money, location, and personnel. The present invention is a gas replacement sealing method of degassing and gas replacement in the chamber using the ventilation passage, and closing the ventilation passage after gas replacement. high substitution rate is to be replaced, is to be further gas replacement if they have air passage in a container of any shape since it does not depend on the packaging container shape, it can cope with containers of various shapes and size to diversify the Can be done.

Further, according to the present invention, a tubular jig for deaeration and gas replacement is directly attached to the ventilation passage 3 so that the air in the packaging container is not deaerated and gas replaced under normal atmospheric pressure. In the present invention, the inside of the chamber is deaerated and the gas is replaced, and the inside of the packaging container is deaerated and replaced by the gas. Since there is almost no difference in atmospheric pressure between the inside of the packaging container and the inside of the chamber (outside of the packaging container) by degassing and replacing the gas inside the chamber, it is possible to prevent the packaging container from being crushed by the atmospheric pressure difference.

In the present invention, the air passage 3 is used for deaeration and gas replacement, but the inner volume of the packaging container is 1000 cm ³
On the other hand, the opening area of the ventilation passage 3 is preferably 0.3 to 3 cm ² . The opening shape of the air passage 3 of the present invention is not a problem as long as it has a hole that allows the inside and outside of the packaging container to come in and out, but the opening shape of the air passage 3 is a square (A in FIG. 3) or a rectangle (FIG. 3B), a quadrangle (C in FIG. 3) having a corner R, a polygon (D in FIG. 3), a circle (FIG. 3).
E), semicircle (F in FIG. 3), ellipse (G in FIG. 3), semi-ellipse (H in FIG. 3), star (I in FIG. 3), indeterminate (J in FIG. 3)
In addition to the cutout shape that has a complete opening,
Shapes that are not completely cut out include a U-shape (K in FIG. 3), a V-shape (L in FIG. 3), a U-shape (M in FIG. 3), and an irregular cut (N in FIG. 3). Since there are no chips when the lid 1 is perforated, these cuts and the like are more preferable.

The area of the ventilation passage 3 in the case of such a cut is represented by the maximum area opened when the hole is expanded by folding back the cut tongue. Although the opening area of the ventilation passage 3 of the present invention varies depending on the internal volume, the internal volume of the packaging container 1
To 000cm ^3, the opening area of the air passage 3 0.3 cm ²
If it is small, a large amount of gas moves between the inside and outside of the packaging container in a short time when degassing inside the chamber 5 or when filling the desired gas into the packaging container. There is a case where the resistance becomes large when passing through, and the resistance causes a pressure difference between the inside and the outside of the packaging container, which may deform the packaging container.

If the opening area of the ventilation passage 3 exceeds 3 cm ² , deaeration and gas replacement can be easily performed, but the area of the adhesive seal 4 that closes the ventilation passage 3 must be large, and the packaging is required. In some cases, the cosmetic appearance of the container may be inferior, or the mechanical strength of the opening of the adhesive seal 4 that is attached by suspending the opening cross-sectional area of the ventilation passage 3 may be poor.
Therefore, the preferable opening area of the ventilation passage 3 is 0.3 to 3 cm.
It is ² , more preferably 0.4 to 2.8 cm ² , and even more preferably 0.6 to ^2.5 cm ² .

Further, it is preferable that the number of the ventilation passages 3 is as small as possible so that it can be closed with one adhesive seal 4 if possible from the viewpoint of reducing the complexity when closing the holes and from the viewpoint of the aesthetic appeal of the packaging container. However, even in the case of a large number of holes, it is possible to close the small holes by consolidating them in one place, and in the case of a plurality of air passages 3 ′ (FIG. 4), with one adhesive seal 4. Further, the mechanical strength of the adhesive seal 4 portion suspended in the opening cross-sectional area of the ventilation path 3 is excellent, and therefore, it is more preferable.

The air passage 3 in the present invention may be any packaging container provided with at least one air passage 3. However, when the contents are accompanied by liquid, the lid 1 is provided with the air passage 3 rather than the container 2. It is more preferable from the viewpoint of leakage of juice. Further, the ventilation passage 3 is usually formed in a process different from the molding, and an example thereof is shown.
First, a plastic sheet is heated and melted, shaped according to a molding die, and a sheet-shaped body in which moldings are connected is cut out by pressing with a cutting blade called a cutting die.

The creation of the air passage 3 is a process in which a sheet-shaped product having a series of molded bodies is pressed and cut by a cutting blade, and a blade for making the air passage 3 is set in advance in the cutting die itself. When a sheet-shaped article having a series of molded bodies is pushed out by a cutting blade and cut out, the ventilation passage 3 is also pushed out and cut out at the same time. For that reason, the lid 1 is used as a site for creating the ventilation path 3 rather than being provided on the side surface of the lid 1.
It is more preferable to be on the top surface from the viewpoint of ease of processing when creating the ventilation passage 3 and leakage of juice due to vibration or shaking during transportation.

As a method of closing the ventilation passage 3 in the present invention,
Although various methods such as a method of attaching the adhesive seal 4 and a method of filling the holes can be considered, it is preferable to close the container 2 with the adhesive seal 4 from the viewpoints of aesthetic appeal and simplicity. Further, more preferably, the adhesive seal 4 may be printed to differentiate the products. The adhesive seal 4 according to the present invention will be described. The adhesive seal 4 referred to in the present invention is characterized by containing a gas barrier material, thereby closing the ventilation passage 3 by suspending it at the opening of the ventilation passage 3 and sealing it so as not to dissipate the desired gas in the packaging container. Of. Therefore, the adhesive seal 4
Needs to have a property of closely adhering to the container 2 and the lid 1. The adhesive seal 4 referred to in the present invention only needs to have a property of adhering, and may be adhered, adhered, or sticky.

The adhesive strength of the adhesive seal 4 of the present invention is appropriately
It may be selected, and the kind of adhesive, the coating amount, etc. may be selected according to the desired adhesive strength. Typical adhesives include water-based, organic solvent-type, hot-melt type, reactive type and the like, but there is no problem as long as it has adhesiveness. Further, when cooking in a microwave oven, from the viewpoint of preventing rupture associated with an increase in the internal pressure of the packaging container such as steam due to microwave heating, the adhesive strength tends to become weaker as the temperature in the packaging container rises. The adhesive seal 4 using a melt type adhesive is more preferable. Further, water-based, organic solvent-based and hot-melt type adhesives that are safe in terms of food hygiene are more preferable.

The shape of the adhesive seal 4 in the present invention may be any shape as long as it can be closed by suspending the ventilation passage 3 by suspending it in the opening of the ventilation passage 3 and preventing the desired gas in the packaging container from being dissipated. Alternatively, the planar shape of the adhesive seal 4 may be a square (A in FIG. 3), a rectangle (B in FIG. 3), a quadrangle with corners R (C in FIG. 3), or a polygon (FIG. 3). D), circle (E in FIG. 3), semicircle (F in FIG. 3), ellipse (G in FIG. 3), semi-ellipse (H in FIG. 3), star (I in FIG. 3), indeterminate (figure) 3 J) and the like.

The gas replacement in the present invention will be described.
The gas replacement in the present invention means that the air in the container 2 is replaced with a desired gas, and there are effects such as an improvement in the storability of the contents and the appearance such as the color of the product. By keeping it in an active gas, it is effective in preventing the oxidation of fats and oils, preserving active ingredients such as vitamins, preventing decay due to the growth of mold, fungi and yeasts, preventing discoloration and discoloration of pigments, and scattering of aroma. can get. Further, it may be possible to further improve the storability of the contents by substituting with a gas having a bacteriostatic action such as carbon dioxide.

As the gas used in the present invention, any gas may be used as long as it is a generally known gas. Examples thereof include nitrogen, carbon dioxide (carbon dioxide gas), oxygen, and argon, which can be used alone or in combination. In addition, ozone or natural and synthetic antibacterial substances (for example, hinokitiol, etc.) generally known for the purpose of sterilizing molds, fungi and yeasts may be used. Degassing and gas replacement in the chamber according to the present invention generally means a chamber-type gas replacement method.
As a gas replacement method, generally, a chamber type, a gas flush type and the like can be mentioned. In the chamber type gas replacement method, the container 2 is placed in a space called a chamber 5, the entire air inside the chamber 5 is once degassed into a vacuum state, and the desired gas is left in the chamber 5 in the vacuum state as it is. Is a method of sending gas and performing gas replacement. Further, the gas flush type gas replacement method is a method of flushing the replacement gas into the packaging container and expelling the air with the replacement gas.

Generally, the chamber type gas replacement method has a high gas replacement rate and is characterized in that the gas replacement can be surely performed. The gas flush type gas replacement method is a simple and inexpensive method. The substitution rate tends to be low. The gas replacement method referred to in the present invention is a chamber-type gas replacement method of the above gas replacement method, and reliably performs gas replacement of air in the space and contents in the packaging container to improve the storability of the contents and In order to exert the effects such as the appearance of the color of the product, it is necessary to use a chamber type that can replace the inside of the packaging container at a high replacement rate.

The package according to the present invention will be described. The term "packaging body" as used in the present invention refers to a packaging body that is packaged using the sealing method of the present invention. That is, in the packaging container in which the contents are contained in the packaging container using the container 2 and the lid 1, and the container 2 and the lid 1 are sealed while leaving at least one ventilation passage 3 in the packaging container, the ventilation passage 3 shows a package that is degassed and gas-replaced by using chamber 3 and is sealed by a gas-replacement sealing method of closing the gas passage 3 after gas replacement.

Since such a package uses the container 2 and the lid 1, it is excellent in aesthetic appearance, and the height of the container 2 is made low and the height of the lid 1 is made high so that the swelling of the contents can be visually recognized. Can be appealed to, and produce a sense of volume of the contents,
Further, since the contents are not crushed by the sheet or film covering the upper part, there is an effect of protecting the contents. Moreover, since the inside of the packaging container is gas-replaced, the preservability of the contents is excellent due to the gas replacement effect.

[0036]

DETAILED DESCRIPTION OF THE INVENTION

[0037]

EXAMPLE FIG. 1 is a diagram showing an example of a packaging container in which the container 2 and the lid 1 are sealed while leaving at least one ventilation passage according to the present invention, and a packaging container sealed with gas replacement by the gas replacement sealing method of the present invention. A description will be given using 1. In FIG. 1A, the container 2 and the lid 1 are completely sealed in advance,
In the present invention, any method of sealing the container 2 and the lid 1 does not cause any problem as long as the container 2 and the lid 1 are completely sealed. In the present invention, the contents are accommodated in the packaging container, and in the packaging container in which the container 2 and the lid 1 as shown in FIG. 1A are sealed, deaeration and gas replacement are performed in the chamber by using the air passage 3. This is a gas replacement sealing method of closing the ventilation passage 3 with an adhesive seal 4 after gas replacement, and an example of the packaging container sealed with gas replacement by the gas replacement sealing method shown in the present invention is B in FIG. In the packaging container illustrated in FIG. 1B, the ventilation passage 3 has a circular opening (E in FIG. 3), the ventilation passage 3 is at the top end of the lid 1, and the adhesive seal 4 is provided.
FIG. 4 is a view in which a ventilation path is suspended and closed by (adhesive seal shape is a circle (E in FIG. 3)) and the packaging container is sealed.

In the packaging container in which the container 2 and the lid 1 as shown in FIG. 1 according to the present invention are sealed, deaeration and gas replacement are performed in the chamber using the air passage 3.
An example of a gas replacement sealing method in which the ventilation passage 3 is closed with an adhesive seal 4 after gas replacement will be described with reference to FIG. 2A is the same as FIG. 1A. The container 2 shown in A of FIG. 2 and the packaging container in which the lid 1 is sealed are put into a chamber 5 to which a gas replacement pipe 6 is connected, and the inside of the chamber is evacuated to a vacuum through the gas replacement pipe 6. After that, a desired gas is introduced into the chamber 5 through the gas replacement pipe 6. Gas replacement pipe 6
When the gas is further deaerated to a vacuum, the inside of the packaging container is also deaerated to a vacuum through the ventilation passage 3, and when a desired gas is then introduced into the chamber 5 through the gas replacement pipe 6, the inside of the packaging container is also vented. It is gas-replaced via 3. In this way, the inside of the packaging container is also degassed and replaced with gas, and since the vacuum is once created, gas replacement is performed even in the space inside the packaging container and the air in the contents, which is difficult to replace by gas flush gas replacement. And a high substitution rate can be achieved (B in FIG. 2). After that, the packaging container can be sealed by closing the air passage 3 with the adhesive seal 4 (C in FIG. 2).

[0039]

According to the prior art, a gas blowing port and a gas discharging port are provided on the top surface of a lid to flush the gas into a packaging container to fill the gas, and then to cover with a heat-shrinkable film having a gas barrier property. In contrast to the method described above, the present invention is a package in which the contents are contained in a packaging container using the container 2 and the lid 1, and the container 2 and the lid 1 are sealed while leaving at least one ventilation passage 3 in the packaging container. This is a gas replacement sealing method of degassing and gas replacing the container in the chamber using the ventilation passage 3 and closing the ventilation passage 3 after the gas replacement, compared to the gas flush method gas replacement method. That is, the air in the contents can be replaced with gas at a high replacement rate. Further, since the heat-shrinkable film can be hermetically sealed without the need for the heat-shrinkable film, the amount of packaging material used is small, and the burden on the business operator based on the Container Recycling Law can be reduced. Further packaging for without depending on container shape in a container of any shape is to be gas replacement if they have air passage, is excellent in that accommodate containers of various shapes and size to diversify.

[Brief description of drawings]

1A is an example of the present invention, and FIG. 1A is a view of a packaging container in which a container 2 and a lid 1 are rectangular containers 2 and a lid 1, and the ridges of the container 2 and the lid 1 are sealed in advance. . 1B is shown in FIG.
FIG. 6 is a diagram in which the air passage 3 is closed by an adhesive seal 4 after gas replacement of A in FIG.

FIG. 2 is an example showing an outline of a gas displacement sealing method of the present invention. 2A is A of FIG. 1 and is a view of a packaging container in which the ridges of the container 2 and the lid 1 are sealed in advance. Figure 2
B of FIG. 2 is a schematic diagram in which the packaging container in which the container 2 and the lid 1 shown in FIG. 2A are sealed is placed in the chamber 5 to which the gas replacement pipe 6 is connected to perform gas replacement. FIG. 2C is a diagram of the packaging container in which the packaging container is hermetically sealed by closing the air passage 3 with the adhesive seal 4.

FIG. 3A to FIG. 3C are examples of the opening shape of the ventilation passage 3 of the present invention, and A to J of FIG. 3 are planar shapes of the adhesive seal 4 that closes the ventilation passage of the present invention. Adhesive seal 4
The size of V is required to close the air passage 3 by suspending it in the opening of the air passage 3 and to seal the displaced gas inside and outside the packaging container so as not to escape.

FIG. 4 is an example of the ventilation passage 3 of the present invention, which is a case of the ventilation passage 3 ′ in which small holes are concentrated in one place.

[Explanation of symbols]

1 lid 1 Two containers two 3 3'ventilation path 4 adhesive seal 5 chambers 6 gas replacement pipe

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Claims (4)

[Claims] 1. After the contents are contained in a packaging container using a container and a lid and the container is covered and sealed while leaving at least one air passage, the packaging container is placed in a chamber. A gas replacement sealing method, comprising degassing the inside of the chamber and replacing the gas inside the chamber to close the ventilation passage. 2. The gas displacement sealing method according to claim 1, wherein the container and the lid include a gas barrier material. 3. The gas displacement sealing method according to claim 1, wherein the ventilation passage is closed with an adhesive tape containing a gas barrier material. 4. A package packaged by using the gas displacement sealing method according to claim 1.