JPH08332022A - Packing film for garlic - Google Patents

Abstract

PURPOSE: To obtain a film which can store garlic under good conditions, when raw garlic is packed. CONSTITUTION: The film for packing garlic, is composed of a synthetic resin composition, for example, comprising polyvinyl alcohol resin, an alkylene glycol and an ethylene-vinyl acetate copolymer resin where the oxygen permeability (PO2 ) is 400-2,000cc/m<2> .day.atm., carbon dioxide permeability (PCO2 ) is 7,000cc/m<2> .day.atm. and the permeability ratio of carbon dioxide/oxygen (PCO2 /PO2 ) is >=7.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a packaging film for garlic. More specifically, in a film made of a synthetic resin, specific oxygen permeability (PO ₂₎ a carbon dioxide permeability for the ratio of _{(PCO 2) (PCO 2 /} PO 2), and specific oxygen permeability and carbon dioxide permeability The present invention relates to a garlic packaging film having, ie, a film that can be satisfactorily stored when garlic is packaged.

[0002]

2. Description of the Related Art In recent years, technological innovation in the food packaging industry has been remarkable, and there is always a demand for optimal food materials. Currently, garlic is put in a polyethylene bag with the skin attached, folded without sealing and packed in cardboard,
Ships at room temperature. The reason for distribution in such a packaging form is that carbon dioxide gas is generated by the breathing of garlic, and in the hermetically sealed package, the package expands. However, if the peeled garlic is packaged, it is possible to cook the garlic immediately, so it is desirable to distribute the peeled garlic in a packaged form, but from the viewpoint of hygiene. The peeled garlic must be sealed.

When garlic is packaged and sealed in a plastic bag, the plastic bag is inflated by carbon dioxide gas generated by breathing garlic, and therefore a film that easily permeates carbon dioxide gas is desired. On the other hand, garlic has a large amount of oxygen,
Discoloration, germination and mold occur, and if less, softening occurs due to the breeding of off-flavor anaerobic bacteria due to fermentation. That is, in order to maintain the quality of garlic, a packaging material that allows appropriate permeation of oxygen is desired. Therefore, the packaging material for hermetically packaging garlic is required to have appropriate oxygen permeability and large carbon dioxide gas permeability.

As a packaging material having gas selective permeability, a polyvinyl alcohol resin having a specific saponification degree described in JP-A-5-222215 (hereinafter,
Used for food packaging of a composition comprising a polymer of alkylene glycol and "PVA" and a saponified ethylene / vinyl acetate copolymer resin (hereinafter abbreviated as "EVOH") There is a melt extruded product. However, these molded products have a low oxygen permeability and are suitable for packaging cheese and coffee beans, and cannot be said to be suitable for packing garlic.

[0005]

In view of the above-mentioned circumstances,
An object of the present invention is to provide a film suitable for packaging garlic, in which the film does not expand due to the breathing of garlic during distribution in a hermetically sealed package and does not give off a strange odor or the like. In addition, "garlic" in the present invention means breathing. Therefore, it refers to raw garlic such as raw garlic and grated garlic.

[0006]

Means for Solving the Problems As a result of diligent examination of the respiration rate of garlic, the present inventors have found that the oxygen permeability (PO
The ratio of carbon dioxide permeability with respect _{2) (PCO 2) (PCO} 2
/ PO ₂ ) is in a specific range and has a specific oxygen permeability (P
We have found that a film having O ₂ ) and carbon dioxide permeability (PCO ₂ ) is suitable as a packaging material for garlic, and completed the present invention.

That is, according to the present invention, a film made of a synthetic resin has an oxygen permeability (PO ₂ ) of 400 to 200.
The range is 0 cc / m ² · day · atm, and the carbon dioxide permeability (PCO ₂ ) is 7,000 cc / m ² · day · at.
The present invention relates to a packaging film for garlic having a ratio of m or more and a ratio of carbon dioxide gas permeability to oxygen permeability (PCO ₂ / PO ₂ ) of 7 or more.

The above garlic packaging film includes PVA (A) having a saponification degree of 60 to 95 mol% and the PVA.
(A) At least one film comprising a composition with a compound (B) selected from an alkylene glycol monomer or a polymer thereof in a range of 3 parts by weight to 100 parts by weight of the PVA (A) and a saturated solubility thereof. Or a PVA having a saponification degree of 60 to 95 mol%.
(A), a compound (B) selected from an alkylene glycol monomer or a polymer thereof and EVOH (C), and the compounding ratio of the compound (B) is PVA (A) 100.
It is in the range of 3 parts by weight to the parts by weight to the saturated solubility of the compound (B) in the PVA (A), and the blending ratio of EVOH (C) is 100 parts by weight of the total of PVA (A) and the compound (B). It is preferable that the film contains at least one film composed of the composition in the range of 5 to 40 parts by weight.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

[Synthetic Resin] The synthetic resin in the present invention is not particularly limited, and examples thereof include polyvinyl alcohol-based resin, EVOH, polyamide-based resin, and compositions containing these. Preferably, the saponification degree is 60 to
A compound (B) selected from 95 mol% of PVA (A) and 3 parts by weight to 100 parts by weight of the PVA (A) to an alkylene glycol monomer having a saturated solubility in the PVA (A) or a polymer thereof. ) Or a compound (B) and EVOH (C) selected from PVA (A) having a saponification degree of 60 to 95 mol%, an alkylene glycol monomer or a polymer thereof, and The blending ratio of the component (B) is in the range of 3 parts by weight to 100 parts by weight of PVA (A) to the saturated solubility of the compound (B) component in the PVA (A), and the blending ratio of EVOH (C) is PVA (. A composition having a range of 5 to 40 parts by weight based on 100 parts by weight of the total of A) and the compound (B) component is preferable.

[PCO ₂ / PO ₂ ] The ratio (PCO ₂ / PO ₂ ) of carbon dioxide gas permeability (PCO ₂ ) to oxygen permeability (PO ₂ ) in the garlic packaging film of the present invention is 7 or more, preferably. Is in the range of 7 to 40, and more preferably in the range of 10 to 40. The ratio (PCO ₂ / PO ₂ ) is 7
If smaller, the garlic package will expand.

[Film Thickness] The oxygen permeability (PO ₂ ) of the garlic packaging film of the present invention is 400 to ₂
It is in the range of 000 cc / m ² · day · atm, preferably in the range of 400 to 1500 cc / m ² · day · atm.

The garlic packaging film of the present invention has a carbon dioxide gas permeability (PCO ₂ ) of 7,000 cc / m ^2.
・ It must be more than day ・ atm.

A film having a film thickness such that the oxygen permeability (PO ₂ ) and the carbon dioxide gas permeability (PCO ₂ ) of the film satisfy both the above requirements is suitable for packaging garlic. The oxygen permeability of the film is 400cc /
When it is less than m ² · day · atm, problems such as generation of offensive odor from garlic and softening occur. On the other hand, the oxygen permeability of the film is 2000 cc / m ² · day · a
Above tm, discoloration, germination and mold development occur. Also, the carbon dioxide permeability of the film is 7,000 cc / m ² ·
is less than day · atm, an oxygen permeability carbon dioxide permeability for (PO ₂₎ the ratio of _{(PCO 2) (PCO 2 /} PO 2)
Even if it is 7 or more, expansion occurs when the garlic is hermetically packaged. Although there is no particular reason why the upper limit of carbon dioxide permeability of the film should be set, it is usually 20,000 cc.
/ M ² · day · atm or less.

The oxygen permeability of the film is 400-2000.
cc / m ² · day · atm and carbon dioxide permeability of 7
In order to achieve 000 cc / m ² · day · atm or more, it is necessary to adjust the film thickness depending on the type of synthetic resin.

The preferred synthetic resins in the present invention are described below.

(PVA) The degree of polymerization of PVA (A) is JI
Measured according to S-K6726, 300 or more is preferable from the viewpoint of strength of the film obtained from the composition described below, and 3500 or less is preferable from the viewpoint of processability, and further in the range of 500 to 2000. Is particularly preferable. The degree of saponification of PVA is usually in the range of 60 to 95 mol%, preferably 60 to 90.
It is in the range of mol%, and more preferably in the range of 60 to 85 mol%. By using a PVA having a saponification degree of 60 or more, the oxygen permeability of the obtained film is small,
On the other hand, when the one having a saponification degree of 95 mol% or less is used, the saturated solubility of the compound (B) selected from the alkylene glycol monomer or the polymer thereof does not become extremely small. , Respectively preferred. Further, PVA having a degree of saponification of 95 mol% or less is preferable also from this point, since the difference between the melting point and the thermal decomposition starting temperature, that is, the moldable temperature range is wide.

(Compound (B) selected from alkylene glycol monomer or polymer thereof) The compound (B) component used in the present invention is selected from alkylene glycol monomer or polymer thereof. As the alkylene glycol, ethylene glycol, propylene glycol,
1,2-butanediol, 1,3-butanediol,
Examples of monomers include 1,4-butanediol and 2,3-butanediol, and 1,2-butanediol and 1,4-
It is preferable to use butanediol. In addition, as a typical example of the polymer, polyethylene glycol (hereinafter,
Abbreviated as [PEG]. ). As the polymer, this PEG is preferable, and when the composition of PVA and PEG is formed into a film in, for example, a melt extrusion step, PEG having an average molecular weight of 400 or more is preferable because it is difficult to dissipate. On the other hand, the upper limit of the average molecular weight of PEG is not particularly limited, but it is preferably about 2,000 or less from the viewpoint of compatibility with PVA. In addition, instead of the compound (B) selected from the alkylene glycol monomer or the polymer thereof, or together with the compound (B) component, the hydroxy acid monomer and the polymer thereof can also be used. Examples of the hydroxy acid monomer include lactic acid as well as lactic acid ester. Furthermore, examples of polymers of hydroxy acids include lactic acid polymers. Of these, lactic acid is preferably used.

(Structural ratio of PVA and compound (B) component)
In the composition of PVA (A) and the compound (B) component,
The lower limit of the compounding ratio of the compound (B) component is 100 of PVA.
It is 3 parts by weight, preferably 5 parts by weight, and more preferably 10 parts by weight with respect to parts by weight. By blending the compound (B) component in an amount of 3 parts by weight or more, the ratio (PCO ₂ / PO ₂ ) of carbon dioxide gas permeability to oxygen permeability of the obtained film or the like is improved. On the other hand, regarding the upper limit of the compounding amount of the component (B), the ratio of the carbon dioxide gas permeability to the oxygen permeability of the film etc. (PCO ₂ / PO ₂ ) obtained by increasing the compounding amount of the compound (B) component is large. Become. However, as long as it is within the saturated solubility of the compound (B) component with respect to PVA, this is especially true when PEG is used as the compound (B) component, but the amount of the compound (B) component that escapes is small during the molding of a film or the like described later. Since bleeding out of the component (B) from the obtained film or the like is also suppressed, the saturated solubility is set as the upper limit, and the preferable upper limit is the saturated solubility of 60.
%. It should be noted that as the saponification degree of PVA increases, the saturation solubility decreases.

In addition to the above two components, the composition may optionally contain various stabilizers, anti-tacking agents, lubricants, colorants, fillers, etc. within a range that does not impair the effects of the present invention. .

(Manufacturing Method of Film Comprising Composition of PVA and Compound (B) Component) The mixing method of the PVA (A) and the compound (B) component is not particularly limited. Using a mixer, etc., 60-1
The compound (B) component is impregnated in the PVA (A) under heating at 20 ° C., and after cooling, it is molded into a film or the like as described below, but the composition pelletized in advance by a twin-screw extruder or the like is film-formed. It is preferably used for However, when a monomer is used among the component (B) components and it is difficult to pelletize the impregnated product by a twin-screw extruder due to evaporation of the monomer, the impregnated product may be used as it is for molding.

The resulting impregnated mixture or pellet is formed into a film. In the film of the present invention, the ratio of the carbon dioxide permeability to the oxygen permeability defined in the present invention (PCO
₂ / PO ₂ ), PO ₂ and PCO ₂ are also included in the concept as long as they satisfy the requirements of PO ₂ and PCO ₂ and are used for hermetically sealing garlic. When a polymer of alkylene glycol is used as the compound (B) component, the film forming method is preferably a melt extrusion molding method, but is not limited thereto. The film may be uniaxially or biaxially stretched. As a molding method, for example, a press molding method, an extrusion method using a T-die, a co-extrusion molding method using a circular die, a deep drawing molding method, or a solid having a smooth surface obtained by bringing the above composition into a solution state with a solvent such as water. The film can also be obtained by a casting method in which the solvent is cast on the surface to evaporate the solvent. In particular, when a monomer of alkylene glycol is used as the component (B) component, it is preferable to form the film by the above casting method.

(Structural ratio of PVA, compound (B) and EVOH) EVOH (C) may be further added to the composition of PVA (A) and compound (B). EVOH to 100 parts by weight of the composition of PVA (A) and compound (B)
The compounding ratio of (C) is preferably in the range of 5 to 40% by weight. When EVOH is 5% by weight or more, PO ₂ does not increase, and when it is 40% by weight or less, the ratio of carbon dioxide permeability to oxygen permeability (PCO
₂ / PO ₂ ) becomes large, which is preferable.

(Method for producing a film or the like comprising a composition of PVA, compound (B) and EVOH) PVA
The mixing method of the components (A), the compound (B) and the EVOH (C) is not particularly limited, but for example,
The compound (B) component is impregnated into PVA under heating at 60 to 120 ° C., cooled, and then pelletized by a twin-screw extruder or the like,
Further, dry blending with EVOH (C) pellets is preferable. When the compound (B) that is solid at room temperature is used, the three may be dry blended as they are. The mixture is formed into a film or the like as described below, but it is preferable to use a composition that has been pelletized in advance by a twin-screw extruder or the like for forming the film or the like.

The resulting impregnated mixture or pellet is formed into a film as in the case of the composition of PVA and compound (B) described above. As in the above, the film includes molded products such as sheets and trays. The film forming method is preferably a melt extrusion molding method, but is not particularly limited thereto. The film may be uniaxially or biaxially stretched. As the forming method, for example, a press forming method, an extrusion forming method using a T-die, a coextrusion forming method using a circular die, a deep drawing forming method and the like can be used.

(Laminated film) The above composition is used as a single layer film, but it is particularly preferably used by laminating it with another thermoplastic resin layer in order to improve water repellency, heat sealability and have practical strength. preferable. Two layers of the layer (a) composed of the composition and another resin layer (b) are laminated, three layers of another resin layer (b) laminated on both sides of the layer (a), or another resin layer (b). (3), in which the layer (a) is laminated on both sides of (3) or more. When another thermoplastic resin is laminated on both sides of the layer (a), the other synthetic resin layers (b) may be the same kind or different resins, but contact with the garlic of the packaging film. It is preferable to use a resin having a heat-sealing property on the inner layer side and a reinforcing resin on the outer layer side. The laminated thermoplastic resin layer is selected so as not to impair the gas selective permeability of the layer (a). Especially oxygen permeability is 2000cc / m ² · d
ay · atm, 20 μm thickness (30 ° C., dry) and carbon dioxide permeability of 8000 cc / m ² · day · atm,
It is preferably 20 μm thick (30 ° C., dry) or more.

The thermoplastic resin to be laminated is at least one ethylene copolymer selected from ethylene and vinyl acetate, or ethylene and acrylates such as methyl acrylate, ethyl acrylate, methyl methacrylate and ethyl methacrylate, or high pressure. Method Low Density Polyethylene, Linear Low Density Polyethylene (LLDP
Examples thereof include E), polyolefin resins such as polypropylene and ionomer, and polyamide resins. Further, an adhesive resin layer may be used for stacking layers. As the adhesive resin, a thermoplastic polymer containing a carboxyl group or a derivative thereof, for example, a polyolefin graft-modified with maleic acid, fumaric acid, maleic anhydride or the like, or obtained by copolymerizing these monomers and olefins Examples thereof include resins, and adipic acid-based polyesters having a urethane bond carboxyl group.

When forming a laminated film of the layer (a) and the other resin layer (b), it is preferable to use an extrusion laminating method, a coextrusion laminating method, a coextrusion inflation method or the like. The packaging film for garlic of the present invention is P
When a film comprising a composition of VA (A) and a compound (B) is included, the film can be formed by a casting method. In this case, a laminated film with another resin can be formed. A laminating method is mainly used for molding.

The garlic wrapping film of the present invention may be used as a bag-shaped bag having various shapes by itself to hermetically wrap garlic, or other materials such as a metal container or a thick plastic container having poor air permeability. In addition, it may be used as a part of a package for packaging garlic, for example, as a cover thereof.

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples.

The physical properties of the films described in the following examples are obtained by the following measuring methods, and the physical properties of the films described in this specification are also based on the measurement results.

<Measurement Method of Permeability of Oxygen and Carbon Dioxide> Oxygen permeability is O measured by Modern Control.
xtran2 / 20, carbon dioxide permeability is Modern
The permeabilities of both gases were measured under the conditions of a temperature of 23 ° C. and a humidity of 80% using a Permatran C-N manufactured by Control.

<Packaging test method> The film is sealed on three sides by impulse heat sealing, and the inner dimensions are 15 cm x 22 cm.
Bag of 500g, which is filled with 500g of peeled garlic, vacuum packing machine (Multibag, sold by Nakamura Sangyo Co., Ltd. AG50)
Type 0) is used to obtain a vacuum packaged package, which is
It was stored for 2 weeks at 70 ° C and 70% RH, and the state of the contents and the package were observed and evaluated. The criteria for evaluating the state of the contents were as follows: ○: no change in state, ×: change in state. In addition, as types of change, an offensive odor, mold, and discoloration were confirmed. As the evaluation of the package, ○: no expansion,
X: There was expansion, and was evaluated by.

(Examples 1 to 4, Comparative Examples 1 and 2) PEG was added to 100 parts by weight of each PVA having a saponification degree of 60 and 80 mol% (manufactured by Kuraray Co., Ltd .; the degree of polymerization is 500).
(Average molecular weight 600) was blended in parts by weight shown in Table-1,
It was aged overnight under a dry heat of 60 ° C. In addition, each of the PVA
The saturated solubility of PEG with respect to 100 parts by weight is 170 parts by weight and 27 parts by weight, respectively. The obtained composition is a twin-screw extruder {Plastic Engineering Laboratory Co., Ltd.
arch Laboratory of Plastic
Technology Co. , BT-3 manufactured by Ltd.
0 ″, 30Φ} and melt-kneaded, and pelletized by using a roll cooling type pelletizer. Each of the obtained pellets was press-molded at a pressing temperature of 180 ° C. to a thickness shown in Table 1 to form a film. A test was conducted based on the above packaging test method. The physical properties of the obtained film are also shown in Table-1.
It was shown to. In the table, PO ₂ (oxygen permeability) and PC
The unit of O ₂ (carbon dioxide permeability) is cc / m ² · day · a
tm. The same applies to the tables below.

[0034]

[Table 1]

(Examples 5 to 7, Comparative Example 3) Degree of saponification 80
10 parts by weight of each of the compound (B) components shown in Table 2 was mixed with 100 parts by weight of PVA (PVA405 manufactured by Kuraray Co., Ltd .: degree of polymerization: 500) at a mol% (each of which was saturated with the compound (B) with respect to PVA). Within the solubility range), 7
It was aged overnight under a dry heat of 0 ° C. Using a 40φ extruder (Plastic Giken unit ruder), the resin temperature was 1
A film having a thickness shown in Table 2 was produced by a T-die method at 80 ° C. A test was conducted based on the above packaging test method. The physical properties of the obtained film are also shown in Table 2.

[0036]

[Table 2]

(Examples 8 to 12) PVA (manufactured by Kuraray Co., Ltd .; saponification degree 80 mol%, polymerization degree 500) and PEG
(Average molecular weight 600) was mixed in the parts by weight shown in Table 3 (both are within the saturated solubility of PEG in PVA), and aged overnight under dry heat at 60 ° C. The resulting composition and EVOH (ethylene content 44 mol%, saponification degree 99
Mol%, melt viscosity at a shear rate of 210 ° C., 10 ² sec ^−1, of 0.6 × 10 ⁴ poise) was dry-blended with the compounding amounts shown in Table 3, and a twin-screw extruder (BT-30,
30Φ) was melt-kneaded and pelletized using a roll cooling type pelletizer. Next, this blended pellet, the resin shown in Table 3 (where EVA is ethylene-
Indicates vinyl acetate copolymer resin, NUC manufactured by Nippon Unica
8425 (vinyl acetate content 7.5%, MI = 2.0), LDPE is a low density polyethylene resin, and Sumikasen G201 (MI = 2.0) manufactured by Sumitomo Chemical Co., Ltd.
As an ionomer, Himilan 1601 (MI = 1.2, density ρ = 0.94) manufactured by Mitsui DuPont Polychemical Co., Ltd.
Was used. The same applies hereinafter. } And an adhesive resin (manufactured by Mitsui Petrochemical Industry Co., Ltd., trade name Admer SF750, MI is 4.7) are melt-kneaded by separate extruders, and a co-extrusion device is used so that the blended product becomes a core layer. Resin temperature 200 ℃
Was melt-coextruded and stretched (2.5 × 3.2 times) to form a film of outer layer (1) / adhesive layer / core layer / adhesive layer / outer layer (2). A test was conducted based on the above packaging test method. The physical properties of the obtained film are shown in Table 3.

[0038]

[Table 3]

(Comparative Examples 4 to 6) Using the resins shown in Table-4, press molding was performed at a pressing temperature of 180 ° C to a thickness shown in Table-4 to form a film. A test was conducted based on the above packaging test method. The physical properties of the obtained film are also shown in Table-
The results are shown in FIG.

[0040]

[Table 4]

Comparative Example 7 Resins shown in Table 5 (in the table,
PVDC indicates polyvinylidene chloride resin, grade FB-2 (vinylidene chloride content 82%) manufactured by Kureha Chemical Co., Ltd. and adhesive resin {EVA, P manufactured by Mitsui DuPont Polychemical Co., Ltd.
2805 (vinyl acetate content 28%, MI = 6.0, density ρ = 0.95)} are melt-kneaded in separate extruders, and PV
The resin temperature is 170 by a coextrusion device so that DC becomes the core layer.
Melt coextrusion was carried out at 0 ° C. and stretching (2.5 × 3.0 times) was performed to form a film of outer layer (1) / adhesive layer / core layer / adhesive layer / outer layer (2). A test was conducted based on the above packaging test method. The physical properties of the obtained film are shown in Table-5.

[0042]

[Table 5]

[0043]

As described in detail above, the film of the present invention has a specific oxygen permeability and a carbon dioxide gas /
Since the oxygen permeability ratio is large, it is suitable for garlic and can prevent the packaging material from swelling, strange odor, mold, discoloration, germination, softening, etc. due to packaging.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C08L 29/04 LDM C08L 29/04 LDM LGU LGU 71/02 LQE 71/02 LQE

Claims (4)

[Claims] 1. A film made of a synthetic resin, having an oxygen permeability (PO ₂ ) of 400 to 2000 cc / m ² · da.
y · atm range, carbon dioxide permeability (PCO ₂ )
Of 7,000 cc / m ² · day · atm or more, and the ratio of carbon dioxide permeability to oxygen permeability (PCO ₂
/ PO ₂ ) is a packaging film for garlic having a value of 7 or more. 2. A film made of synthetic resin has a saponification degree of 6.
0 to 95 mol% of polyvinyl alcohol resin (A) and 3 to 100 parts by weight of the polyvinyl alcohol resin (A)
A film comprising, in at least one layer, a film made of a composition with a compound (B) selected from a monomer of alkylene glycol or a polymer thereof in a range of parts by weight to a saturated solubility in the polyvinyl alcohol resin (A). The packaging film for garlic according to 1. 3. A film made of synthetic resin has a saponification degree of 6.
A polyvinyl alcohol resin (A) of 0 to 95 mol%, a compound (B) selected from alkylene glycol monomers or polymers thereof, and a saponified ethylene / vinyl acetate copolymer resin (C). The blending ratio of B) is in the range of 3 parts by weight to 100 parts by weight of the polyvinyl alcohol resin (A) to the saturated solubility of the compound (B) in the polyvinyl alcohol resin (A).
The compounding ratio of the saponified vinyl acetate copolymer resin (C) is 1 in total of the polyvinyl alcohol resin (A) and the compound (B).
The packaging film for garlic according to claim 1, which is a film containing at least one film composed of the composition in an amount of 5 to 40 parts by weight relative to 00 parts by weight. 4. The ratio (PCO ₂ / PO ₂ ) of carbon dioxide permeability to oxygen permeability is in the range of 7 to 40.
The packaging film for garlic according to any one of 3 above.