JPH05319459A - Double-packaging container - Google Patents

Abstract

PURPOSE:To provide a double-packaging container which is excellent in quality maintaining characteristics that allows a deoxydizing agent to satisfactorily exhibits its quality maintaining effect without problems of safety and hygienics even when the container is applied to foods and medicines such as wet foods, beverage, etc., by solving such problem that a conventional double-packaging container containing the deoxydizing agent has, that is, its inner packaging material is not air-permeable even when it is resistant to liquid and not liquid- permeable. CONSTITUTION:A film or sheet, which has an oxygen-permeability of 10,000cc/ m<2>.24hr.atm or higher and a non-penetrated membrane part with a number of non-penetrating fine pours, is used for at least part of an inner packaging material 1. An objective article 4 whose quality is to be maintained is packaged with the inner packaging material 1 and then with an outer packaging material 3 together with a deoxydizing agent 2. This double-packaging material is effectively applied to the objective article 4 which requires prevention of leakage and pollution by germ and the deoxydizing agent for maintaining the quality, and used in various fields including not only foods, beverages and medicines but also metallic parts, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double package which is excellent in quality retention and which is obtained by double-packing a package of an object with an oxygen scavenger. More specifically, it was packaged using at least a part of a film or sheet having an oxygen permeability of 10,000 cc / m ² · 24 hr · atm or more in which non-penetrating micropores are perforated and a non-penetrating membrane portion is left. The present invention relates to a double package in which an object is double-packaged with an oxygen scavenger.
The double-packed body excellent in quality retention according to the present invention is a liquid beverage, soy sauce, aseptic packaged food, pharmaceuticals such as infusion bag, and the like, which is basically used for quality maintenance of various objects which deteriorate in quality due to oxygen. Is often used in. In particular, it can be effectively used for maintaining the quality of an object for which it is necessary to prevent leakage or bacterial contamination, and an oxygen absorber is required for quality maintenance.

[0002]

2. Description of the Related Art In recent years, oxygen scavenger packages have been widely used for quality preservation not only in the food field such as foods and beverages but also in a wide range of fields such as pharmaceutical fields as a representative of the quality control agent packages. ing. However, in the oxygen absorber package, as the breathable packaging material for the oxygen absorber, for example, a laminate of paper and a perforated polyethylene film is used.
The air permeability in this case was controlled by the porosity of the polyethylene film. When an oxygen absorber packaged with such a breathable material is applied to a product with a high water content, the packaging material is inferior in water resistance. It is not preferable because the oxygen absorber component oozes out or rusts through the polyethylene film holes.
Furthermore, the oxygen absorption rate may slow down due to water wetting. For this reason, it is pointed out that there is a safety and hygiene problem when using an oxygen absorber in direct contact with humid foods, foods such as liquid beverages, or liquid pharmaceuticals such as infusion bags. Although there are various kinds of objects to be held, many objects are difficult to apply.

As a means for solving such a problem, a double wrapping form is usually adopted in which an object is once wrapped with an inner wrapping material such as a plastic film and then wrapped with an oxygen scavenger with an outer wrapping material. Then, in the case of double packaging, in the case of a solid substance or the like that does not leak the target object, the plastic film to be wrapped has a needle hole to give sufficient air permeability to the inner packaging material, and the effect of the oxygen scavenger. It is possible to demonstrate.

[0004]

However, in the case where the object is likely to leak due to a liquid or the like, or is manufactured in an aseptic state or is heat-sterilized after packaging, it is necessary to use a completely hermetically sealed package. In order to ensure the packaging suitability, strength, etc. of the inner packaging material, it is necessary to use a plastic film with a certain thickness or more, so the air permeability of the inner packaging material is small and the effect of the oxygen scavenger should be fully exerted. There was a problem that I could not do it. That is, in a double package that is completely hermetically packaged in an inner packaging material having low air permeability, it takes a lot of days to deoxidize the inside of the wrapped inner packaging material of the object, and during that time, the object may be affected by oxygen. It has been pointed out that there is a problem in maintaining the quality of the oxygen-absorbing agent-enclosed double package, which is oxidatively deteriorated, discolored, and causes microbial growth.

The object of the present invention is to solve the problem of the conventional double package containing an oxygen scavenger. Specifically, as described above, even if the inner packaging material is liquid impermeable, it is breathable. It is a dual solution that solves the problem of small size, has no safety and health problems when applied to foods such as high-humidity foods and liquid drinks, and pharmaceuticals, and can fully demonstrate the quality-retaining effect of oxygen scavengers. To provide a package.

[0006]

The present inventors have completed the present invention as a result of earnest research in view of the problems of the above-mentioned prior art. The double wrapping body based on the present invention is an object packaged with an encapsulating material using an oxygen permeable film or sheet in which at least a part of non-penetrating micropores are perforated while leaving a non-penetrating membrane portion. Is a double wrapping body obtained by wrapping with an oxygen scavenger in an outer packaging material. That is, the present invention is 10,000 cc / m ² · 24 hr in which non-penetrating micropores are perforated to leave a non-penetrating membrane portion.
.Films or sheets with oxygen permeability of atm or higher
The present invention relates to a double wrapping body having a constitutional requirement that a packaged object using at least a part of a package is double-wrapped with an oxygen scavenger. The present invention will be described in detail below.

In the present invention, the film or sheet used for at least a part of the inner packaging material is 10,000 cc / m ² .multidot.
It is a film or sheet having an oxygen permeability of 24 hratm or more, and for example, materials having the following constitutions are used.

(1) Heat-resistant films such as films made of polyethylene terephthalate, polyamide, polypropylene, polycarbonate, cellophane, polymethylpentene or polyvinyl alcohol, polyvinylidene chloride coated films, aluminum foil laminated films, aluminum deposited films, etc. To polyethylene,
A heat-resistant film is formed on a laminated film obtained by laminating and bonding a sealing film made of polypropylene, ethylene acrylic acid copolymer resin, ethylene ethyl acrylate copolymer resin, ionomer, polybutadiene, ethylene vinyl acetate copolymer resin film, etc. A wrapping material formed by penetrating from the side thereof and forming a non-penetrating microporous layer having a non-penetrating residual film portion left on at least the sealable film side.

(2) The above heat-resistant film alone or the laminated film of (1) above and a heat-sealing non-woven fabric (for example, polypropylene, polyethylene such as Unitika's "Elves", Teijin's "Unicel", etc.). Wet or dry non-woven fabrics made of synthetic fibers, composite fibers, synthetic pulp, etc. are used, and various microporous membranes made of polyethylene, polypropylene, etc. (for example, "Serpore" manufactured by Sekisui Chemical Co., Ltd. Water-resistant non-woven fabrics made of synthetic resin or synthetic pulp (for example, "Tyvek" manufactured by DuPont, manufactured by Asahi Kasei) are used. "Luxer", various non-woven fabrics such as "Alto" made by Awa Paper Co., Ltd. that does not pass water under normal pressure are used) are laminated and adhered to the laminated sheet, and the heat-resistant film side is punched. Without even laminated sheet - formed by bored blind microporous leaving the remaining film portion of the blind to preparative packaging material.

(3) A single film having heat sealability such as heat sealable polyethylene terephthalate or polypropylene is perforated from the side opposite to the heat seal surface, and at least a residual film portion is left unpenetrated. A packaging material that is perforated.

(4) The above heat-resistant film alone or the laminated film obtained by applying hot melt as a seal layer to the above-mentioned (1) laminated film is perforated from the heat-resistant film side, and at least the laminated film is not exposed. A packaging material formed by punching unpenetrated micropores leaving a residual film portion of the penetration.

(5) At least the residual film portion is left on the film of polyethylene, polypropylene, ethylene acrylic acid copolymer resin, ethylene ethyl acrylate copolymer resin, ionomer, polybutadiene, ethylene vinyl acetate copolymer resin, polyvinyl chloride, etc. A packaging material made by piercing unpenetrated micropores.

The above-mentioned constitution is mentioned as an example, but the present invention is not limited to the above-mentioned examples, and other combinations may be used as long as the object of the present invention can be achieved. In addition, compounding various reinforcing materials for reinforcement is also appropriately performed.

The heat-resistant film in the packaging material having the above-mentioned structure is a film made of polyethylene terephthalate, polyamide, polymethylpentene, polypropylene, polyvinyl chloride or the like, in consideration of packaging suitability, easiness of perforation, oxygen permeability and the like. Use is preferred.

As the seal layer, an ethylene acrylic acid copolymer resin, an ethylene ethyl acrylate copolymer resin, an ionomer or an ethylene vinyl acetate copolymer resin film is preferably used. Since it is applied to objects to be heat treated such as heat sterilization, if heat resistance is required, the sheet
It is preferable to use a film of polypropylene, high-density polyethylene, medium-density polyethylene, or the like as the rule layer. In addition, it is also one of the preferable measures to use the heat-sealing single film perforated as it is. When printing is performed on the packaging material having the above structure, it is preferable for safety and hygiene that printing is performed between the laminated films on the back side of the transparent plastic film on the surface.

The method of laminating and bonding is not particularly limited, and dry laminating, extrusion laminating, heat laminating and the like can be freely selected. Further, the above configuration is not limited to use as a film in advance, and for example, a polyethylene film layer is formed on a heat-resistant film by extrusion lamination, or a laminated film is manufactured at once by a coextrusion method and used. It is also possible.

The plastic film used in the above construction preferably has a thickness of 10 to 200 μm from the viewpoints of packing suitability, handling strength, easiness of perforation, etc. Not as long.

The method for forming the unpenetrated micropores while leaving at least the residual film portion in the film or sheet according to the present invention includes chemical pretreatment, mechanical perforation method, and laser photoperforation method. Various kinds of perforation methods such as the electron irradiation perforation method, the plasma perforation method, the high pressure discharge perforation method and the like can be applied, but the high pressure discharge perforation method is preferable and effective.

As the high-pressure discharge perforation method, any of a spark gap method, a vacuum tube method and a solid state method can be applied, but the solid state method is a preferable method. The perforation by the high-pressure discharge perforation method is carried out by passing a target packaging material while applying a high voltage between the discharge electrode and the dielectric roll while discharging. And the perforation density and perforation depth are the distance between the discharge electrode and the dielectric roll, the voltage,
It is appropriately adjusted depending on the shape of the discharge electrode, the characteristics of the dielectric roll, and the like. In this case, adjustment is also required depending on the thickness of the material to be punched, the material, and the passing speed.

In order to perforate the unpermeable micropores of the present invention, it is not sufficient to simply apply a high voltage between the discharge electrode and the dielectric roll to allow the target packaging material to pass while discharging. Ingenuity is required. As one of the pretreatments, it is also effective to perform a pretreatment step of mechanically making fine scratches with a file-shaped roll or the like before discharge perforation. Alternatively, it is also effective to carry out discharge perforation after forming a polar group on the film surface by acid treatment. Further, in order to provide a local discharge part in the dielectric roll, it is possible to disperse the missing part in the covered dielectric layer or to make the dielectric layer in which the conductive material is dispersed to obtain the perforation density and the perforation depth. It is effective for adjustment.

The material of the electrode used is aluminum, stainless steel or the like, but aluminum is preferably used. As the shape of the electrode, a knife edge type, a bar type, a shoe type or the like is used, but a knife edge type or a type in which the tip of the discharge part has many needles is preferable. The processing power needs to be adjusted depending on the thickness, material, passing speed, etc. of the perforation target packaging material, but is performed, for example, in the range of 5 to 200 W / m ² / min. The perforation direction is such that the residual film portion side is in contact with the dielectric roll.

The air permeability represented by the oxygen permeability in the film or sheet in which the non-penetrating micropores according to the present invention are perforated and the non-penetrating membrane portion is left, is the perforation density at the time of perforation,
It can be suitably adjusted by the perforation depth (residual film thickness) and the pore diameter. Perforation density of 1,000 to 10,000,000
It is preferably perforated in the range of pores / cm ² and preferably 10,000 pores / cm ² or more, more preferably in order to secure sufficient oxygen permeability.
Perforated in the range of 50,000 holes / cm ² or more.

The depth of perforation, that is, the residual film portion at the time of perforation of non-through holes, is a thickness within a practical range in consideration of the characteristics of the packaging material, the packaging material strength of the residual film portion, etc. according to the desired oxygen permeability. Is adjusted. Generally, the thickness of the residual film is required to be 0.5 μm or more from the viewpoint of the strength of the packaging material, and is adjusted in the range of 10 μm or less to secure sufficient oxygen permeability, and preferably 1 to 7 μm. Adjusted to range. The pore size is similarly adjusted in consideration of the oxygen permeability, the packaging material strength, etc., but when the print pattern is printed, it is difficult to distinguish the print pattern if the pore size is too large, so it is preferably 500 μm or less. Adjusted in the range of. The perforations can be carried out from one side or both sides of the packaging material and are selected in consideration of the desired oxygen permeability, the characteristics of the packaging material and the strength of the residual film portion.

The oxygen permeability of the film or sheet in which the non-penetrating micropores are perforated and the non-penetrating membrane portion is left is adjusted as necessary, but in practice 10,000 cc / m ² · 24Hr · atm
Or more, preferably 50,000cc / m ² · 24Hr · atm or more, more preferably ^{100,000 cc / m 2 · 24Hr ·} atm or more.

As described above, according to the present invention, the film or sheet having the above-mentioned constitution is provided with the non-penetrating perforations while leaving the non-penetrating membrane portion, whereby the oxygen permeability is 10,000 cc / m ² · 24.
It is possible to obtain a material having excellent liquid resistance while maintaining the Hr · atm or more, and it is possible to impart a function that cannot be obtained by the conventional encapsulating material. That is, by providing a non-penetrating membrane part while ensuring oxygen permeability that can sufficiently exert the function of the oxygen scavenger, it is extremely useful as an encapsulating material for liquid resistance and a barrier against bacterial contamination. It is possible to obtain an oxygen permeable material.

In the double wrapping material of the present invention, the above-mentioned oxygen-permeable inner wrapping material is used to wrap an object, and this is double-wrapped with an oxygen scavenger in an outer wrapping material having a high gas barrier property. The following example is shown as a double-wrapping form. (1) A form in which a quality-retaining target is hermetically packaged with an oxygen-permeable inner packaging material, and then the packaging body is double-packaged with a packaging material having a high gas barrier property together with an oxygen scavenger (FIG. 1).

(2) A container such as a tray containing a quality-retaining object is hermetically packaged in a lid using an oxygen-permeable encapsulating material, and then the container together with an oxygen scavenger has a high gas barrier property. The double-wrapped form (Fig. 2).

The outer wrapping material may be substantially air-impermeable,
As a packaging material having a high gas barrier property used as an outer packaging material, for example, a film made of polyethylene terephthalate, polyamide, polypropylene, polycarbonate, cellophane or polyvinyl alcohol, a polyvinylidene chloride coated various film, an aluminum foil laminated film, and , Various aluminum vapor deposition films, and the like. Also, the oxygen permeability of the film used for the outer packaging material is preferably 500 cc / m ² · 24 Hr · atm or less, 100 c
It is particularly preferably c / m ² · 24Hr · atm or less.

A deoxidizing agent is a typical example of the quality-retaining agent used in the double package of the present invention. The oxygen absorber is
For example, sulfite, bisulfite, dithionite, hydroquinone, catechol, resorcin, pyrogallol,
Gallic acid, rongalite, ascorbic acid and / or its salt, isoascorbic acid and / or its salt,
Sorbose, glucose, lignin, dibutylhydroxytoluene, butylhydroxyanisole, ferrous salt,
Alternatively, a packaged deoxidizer containing a metal powder such as iron powder, a carbon dioxide generating oxygen absorber or a carbon dioxide absorbing oxygen absorber is used. The shape of the oxygen scavenger is not particularly limited, such as powder, granules, lumps, and sheets. Further, a sheet obtained by mixing a deoxidizer with pulp or the like to form a sheet, a sheet obtained by mixing with a thermoplastic resin or the like and then formed into a sheet, and a deoxidation material obtained by blending a polymer material and a metal catalyst are also used. The oxygen scavenger is not limited to the shape and composition.

The objects of the double package according to the present invention include, for example, cut rice cakes, noodles, rice, jellies, juices and the like, which are manufactured and packaged in a relatively sterile state, infusion bags, infusion bags, and the like. Examples thereof include medicines and foods that are heat-sterilized such as blood bags and retort foods, liquids that are easily deteriorated by oxygen such as soy sauce, confectionery that preserves aroma, and luxury items. The object of the present invention is not necessarily limited to the exemplified ones, and an article for which leakage prevention or bacterial contamination prevention is necessary and an oxygen scavenger is effective for quality maintenance is an object of the double package.

[0031]

EXAMPLES Next, more detailed description will be given with reference to examples.
The present invention is not limited to this embodiment. Example 1 A laminated film (OPP / PE) was obtained by extrusion laminating polyethylene to a thickness of 25 μm on a stretched polypropylene film (thickness 20 μm). An oxygen-permeable packaging material was obtained by piercing the laminated film with a non-penetrating hole from the polypropylene film side using a solid state discharge processor. At this time, the thickness of the non-penetrating membrane part was 5 μm.
Using this oxygen permeable packaging material, a 5 × 7 cm rice cake is
It was packaged to obtain individually wrapped rice cake packages. Next, 5 pieces of the individually packaged mochi packages were filled with 3 g of an oxygen scavenger (3 g of an iron-based oxygen scavenger,
(0 × 50 mm size) and a 200 × 300 mm vinylidene chloride stretched nylon / polyethylene bag, which was then sealed and sealed to form a double package. In addition, an oxygen detector (Ageless Eye; manufactured by Mitsubishi Gas Chemical Co., Inc.) that has the function of discoloring from blue to pink at an oxygen concentration of 0.5% or less is enclosed in the double-wrapped individually wrapped mochi package. Oita. The cut rice cake double package was stored at 25 ° C., and the number of days until the oxygen sensing agent discolored and the appearance of the rice cake were observed. In addition, after storing for 20 days, the outer package was opened, the individually wrapped rice cake package was left to stand, and the number of days until the mold was formed on the individual rice cake was observed. The test results are shown in Table 1.

Comparative Example 1 Further , as a packaging material for individually slicing rice cakes, the laminated film of Example 1 was used without perforating, and an individually wrapped rice cake package was prepared in the same manner as in Example 1 to prepare an oxygen scavenger (iron-based). Deoxidizer 3g
Filled, 50 × 50 mm size) and sealed in a 200 × 300 mm vinylidene chloride stretched nylon / polyethylene bag and hermetically sealed to give a double package. Also in this case, as in Example 1, the oxygen detecting agent was sealed in the individually wrapped rice cake package and subjected to the same test as in Example 1.

Comparative Example 2 As a packaging material for individual packaging of sliced rice cake, the laminated film of Example 1 was used without being perforated to prepare an individually packaged sliced rice cake package in the same manner as in Example 1, and the needles having a diameter of 1 mm were passed through three places. After perforating the pores, the bag was sealed in a bag and sealed with a deoxidizer in the same manner as in Example 1 to obtain a double package. The same test as in Example 1 was performed. The test results of Comparative Example 1 and Comparative Example 2 are also shown in Table 1.

[Table 1] Number of days of discoloration of oxygen sensing agent State of rice cake during storage Date of mold development after opening outer bag Example 1 1-2 days No abnormality 3-4 days Comparative Example 1 7-10 days Mold production Comparative Example 2 1 Day abnormality None one day later

As is clear from the results of Table 1, in Example 1, the quality retaining function of the oxygen scavenger was sufficiently exerted by the effect of the encapsulating material having excellent oxygen permeability, and the quality of the rice cake during storage was good. Held in. Further, even after the outer bag is opened, since the individually wrapped rice cake package is completely sealed, there is no bacterial contamination from the outside, and at the same time, the oxygen concentration in the individual package is unlikely to rise, and compared with Comparative Example 2 Occurrence is slow, and the result of Example 1 is
While showing the high commercial value of the double wrapping body based on this invention, in Comparative Example 1, the oxygen permeability of the inner packaging material which is not perforated is small, the oxygen absorption is slow, and mold is generated before it is deoxidized. The quality retaining effect of the oxygen absorber was not exhibited. Further, in Comparative Example 2, although the quality of the cut rice cake during storage was good due to the presence of the vent holes, mold development was observed on the first day after opening the outer bag. In addition, when the initial number of bacteria in the rice cake is small, the number of days of mold development after opening the outer bag of Example 1 and Comparative Example 2 is further increased, and the difference in commercial value is increased.

Example 2 Polyethylene terephthalate film (thickness 12 μm)
Then, polyethylene was extrusion-laminated to a thickness of 40 .mu.m to obtain a laminated film. This laminated film was punched from the polyethylene terephthalate film side with unpenetrated holes by a solid state discharge processor to obtain an oxygen permeable packaging material. At this time, the thickness of the non-penetrating membrane part was 5 μm. Using this oxygen-permeable packaging material, 100 g of soy sauce pickled takuan was hermetically sealed. The takuan package was sealed with a deoxidizer (iron-based deoxidizer 3 g, 50 × 50 mm size) in a vinylidene chloride stretched nylon / polyethylene bag of 200 × 300 mm and sealed. It was a double package. This Takuan double package was stored at 35 ° C. under irradiation with a fluorescent lamp, and the quality of Takuan after storage for 2 weeks was confirmed, and at the same time, the state of the enclosed oxygen absorber package was observed. The test results are shown in Table 2.

COMPARATIVE EXAMPLE 3 As a packaging material for soy sauce pickled takuan, the laminated film of example 2 was used without being perforated, the takoan was hermetically sealed, and then the outer side was packaged in the same manner as in example 2 It was a heavy package. The obtained Takuan double package was subjected to the same test as in Example 2.

Comparative Example 4 In Comparative Example 3, the laminated film of Example 2 was used without being perforated, and the head space portion of the packed bag of persimmon was punched at two places with a needle having a diameter of 1 mm. Then, the outer side was packaged in the same manner as in Example 2 to obtain a double pack of sardines. The obtained Takuan double package was subjected to the same test as in Example 2. The test results of Comparative Example 3 and Comparative Example 4 are also shown in Table 2.

[Table 2] Takuan quality Oxygen absorber packaging state Example 2 Very good No change Comparative Example 3 Browning and no palatability No change Comparative Example 4 Browning and no palatability Rust / stain generation

As is clear from the results of Table 2, Example 2
On the other hand, the quality-retaining function of the oxygen scavenger was sufficiently exhibited by the effect of the encapsulating material having excellent oxygen permeability, and the quality of Takuan was maintained well. Moreover, no particular abnormality was found in the enclosed oxygen absorber package. On the other hand, in Comparative Example 3, since the oxygen permeability of the encapsulating material was small, the effect of the oxygen scavenger was not exhibited, and the quality of takuan was changed. In the case of Comparative Example 4, the liquid resistance of the encapsulating material was insufficient, and the soybean soup wets the oxygen absorber package, oxygen absorption stops halfway, and stains and rust occur on the oxygen absorber package itself. did.

[0039]

In the double package according to the present invention, when the quality-preserving object is wrapped in the inner packaging material and is double-wrapped with the oxygen scavenger in the packaging material having a high gas barrier property, the inner packaging material is not packaged. Penetrating micropores were perforated leaving a non-penetrating membrane part 10,000
By packing a film or sheet having an oxygen permeability of cc / m ² · 24hr · atm or more at least in part, an encapsulating material having sufficient oxygen permeability can sufficiently exert the effect of the oxygen scavenger. Liquid resistance, prevention of bacterial contamination,
It has excellent effects in preventing leakage of contents. Also,
Even when packaging high-moisture products or liquid products, the liquid does not wet the oxygen absorber, and the oxygen absorber does not stain or rust. The agent can exert a sufficient function. Therefore, the double package excellent in quality retention according to the present invention, the object is required to prevent leakage or bacterial contamination prevention, and to maintain the quality of the object for which the oxygen absorber is required for quality maintenance. Is effectively used,
Not only foods and beverages, pharmaceuticals, but also metal parts, etc.
It can be used in a wide range of fields.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a double package in which a quality-retaining target which is hermetically packaged with an oxygen permeable inner packaging material is packaged with an oxygen scavenger in an outer packaging material having a high gas barrier property.

FIG. 2 is a cross-sectional view of a double package in which a quality-preserving object, which is put in a tray and hermetically packaged with a lid of an oxygen-permeable inner packaging material, is packaged with an oxygen scavenger with a high gas barrier property.

FIG. 3 is a cross-sectional view of a heat-resistant film / heat-sealable film laminate sheet in which non-penetrating micropores are perforated while leaving a non-penetrating membrane portion.

FIG. 4 is a cross-sectional view of a heat-sealing film in which non-penetrating micropores are perforated while leaving a non-penetrating membrane portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oxygen-permeable inner packaging material 11 Heat-resistant film 12 Heat-sealing film 13 Non-penetrating microporous 2 Oxidizing agent 3 Outer packaging material with high gas barrier property 4 Quality preservation target

Claims (1)

[Claims] 1. A film or sheet having an oxygen permeability of 10,000 cc / m ² · 24 hr · atm or more, in which non-penetrating micropores are perforated to leave a non-penetrating membrane portion, and it is packaged using at least a part thereof. A double package in which the target object is double-packaged with an oxygen scavenger.