JP2021109678A - Apple package and apple storage method - Google Patents

Abstract

To provide an apple package capable of suppressing the etiolation of the pericarp of an apple over a long period of time, and an apple storage method using the same.SOLUTION: An apple package comprises a packaging member and an apple packaged in the packaging member. In a state before the packaging member is opened, an oxygen concentration within the packaging member is in the range of 0.5-15.0 vol.%, and a carbon dioxide concentration within the packaging member is in the range of 4.0-10.0 vol.%.SELECTED DRAWING: None

Description

The present invention relates to an apple package and a method for storing apples.

The respiratory state of fruits and vegetables changes depending on the surrounding gas atmosphere, for example, oxygen concentration, carbon dioxide concentration, and the like. In addition, when storing fruits and vegetables, appropriate conditions such as oxygen concentration and carbon dioxide concentration differ depending on the type of fruits and vegetables. For example, the following method has been proposed as a method for preserving apples, which are fruits and vegetables.

In Patent Document 1, it is a package in which apples are wrapped in a synthetic resin film, and the oxygen permeation rate P per 100 g of apples in the package is 50 to 200 cc / 100 g / day / atm, and the package has an average pore diameter of 20. A package having a fine pore of ~ 100 μm and an opening area of 2.9 × 10 ^{-4 to} 1.0 × 10 ^-2 mm ² per 100 g of apple, and a method for storing apples using this package Proposed. It is described in Patent Document 1 that, in addition to preventing softening of the flesh, it is possible to prevent oil rising, which is a phenomenon peculiar to apples.

Next, in Patent Document 2, in the packaging of an apple in which the apple is contained in the packaging, the oxygen permeation rate of the packaging bag used for the packaging is 50 to 300 cc / 100 g, day, atm per 100 g of the apple. The carbon dioxide permeation rate is 70 to 650 cc / 100 g · day · atm per 100 g of the apple, and the oxygen concentration and the carbon dioxide concentration in the packaging of the apple are 1.8% in the state before opening the packaging bag. An apple package having a carbon dioxide concentration of 3.2% or more and less than 8%, and a carbon dioxide permeation rate / oxygen permeation rate value of 1 or more and 4.53 or less, and this package were used. A method of preserving apples has been proposed. It is described in Patent Document 2 that an apple having good freshness can be provided without softening of the flesh of the apple, reduction of acidity, internal browning, and offensive odor.

Japanese Unexamined Patent Publication No. 2008-295417 Japanese Unexamined Patent Publication No. 2006-109765

The package and apple storage method described in Patent Document 1 do not describe appropriate conditions such as oxygen concentration and carbon dioxide concentration in the package when storing apples. The peel of apples may turn yellow during storage, but Patent Document 1 does not study any appropriate conditions such as oxygen concentration and carbon dioxide concentration in the packaging necessary to suppress the yellowing of the peel. ..
Although the apple packaging and the apple storage method described in Patent Document 2 describe conditions such as oxygen concentration and carbon dioxide concentration in the packaging when storing apples, the yellow color of apple peel over a long period of time. There is room for improvement in terms of suppressing carbon dioxide.

The present disclosure has been made in view of the above circumstances, and an object of the present invention is to provide an apple package capable of suppressing yellowing of apple peel for a long period of time, and a method for storing apples using the same.

Means for solving the above problems include the following embodiments.
<1> A packaging member and an apple packaged with the packaging member are provided.
In the state before opening the packaging member, the oxygen concentration in the packaging member is 0.5% by volume to 15.0% by volume, and the carbon dioxide concentration in the packaging member is 4.0% by volume to 10.0% by volume. %, And the number of holes having a maximum diameter of 50 μm or more is 1 or less per 1 ^{m 2.}
<2> The apple packaging according to <1>, wherein the oxygen concentration is 10.0% by volume or less.
<3> The apple packaging according to <1> or <2>, wherein the carbon dioxide concentration is 5.0% by volume or more.
<4> 23 ° C. of the packaging member, the oxygen permeability per apple 100g at 90% ^RH, a ^{10cm 3 / 100g · day · atm~200cm} 3 / 100g · day · atm, 23 ℃ of the packaging member, carbon dioxide permeability per apple 100g at 90% RH ^is a ^{30cm 3 / 100g · day · atm~500cm} 3 / 100g · day · atm <1> ~ apple packaging according to any one of <3> body.
<5> The apple packaging according to any one of <1> to <4>, wherein the packaging member contains a polymer having a structural unit derived from 4-methyl-1-pentene.
<6> The apple according to any one of <1> to <5>, which has a layer containing at least one selected from the group consisting of polypropylene, polyethylene, nylon, polyethylene terephthalate, polylactic acid and polybutylene succinate. Packaging body.
<7> The apple packaging according to any one of <1> to <6>, further comprising at least one of an ethylene absorbent and an ethylene decomposing agent in the packaging member.
<8> The apple package according to any one of <1> to <7>, wherein the apple variety is Orin, Golden Delicious, India, or a hybrid thereof.

<9> A method for storing apples, which comprises a step of storing the apple packaging according to any one of <1> to <8> in an environment of 0 ° C. to 5 ° C.

According to the present disclosure, it is possible to provide an apple package capable of suppressing yellowing of apple peel for a long period of time, and a method for storing apples using the same.

In the present disclosure, the numerical range indicated by using "~" indicates a range including the numerical values before and after "~" as the minimum value and the maximum value, respectively.
In the numerical range described stepwise in the present disclosure, the upper or lower limit value described in one numerical range may be replaced with the upper limit value or lower limit value of another numerical range described stepwise. , May be replaced with the values shown in the examples.

<Apple packaging>
The apple packaging body of the present disclosure includes a packaging member and an apple packaged by the packaging member.
In the state before opening the packaging member, the oxygen concentration in the packaging member is 0.5% by volume to 15.0% by volume, and the carbon dioxide concentration in the packaging member is 4.0% by volume to 10.0% by volume. %, And the number of holes having a maximum diameter of 50 μm or more is 1 or less per 1 ^{m 2.}

As a result of the studies by the present inventors, it was found that the apple packaging of the present disclosure can suppress the yellowing of apple peel for a long period of time. The reason is not always clear, but it can be considered as follows. In the apple packaging of the present disclosure, the respiration of apples in the packaging member is appropriately regulated in order to satisfy the above conditions. As a result, in the apple packaging of the present disclosure, yellowing of apple peel can be suppressed for a long period of time.

The apple wrapping body of the present disclosure can be produced by wrapping an apple using a wrapping member described later. The composition of the gas to be filled during the preparation of the apple packaging may be unadjusted (atmosphere) or adjusted. From the economical point of view, it is preferable that there is no adjustment.

In the apple packaging of the present disclosure, the oxygen concentration in the packaging member is 0.5% by volume to 15.0% by volume in the state before the packaging member is opened. For apples that have been stored for a long period of time, the oxygen concentration in the packaging member is preferably 1.0% by volume or more from the viewpoint of suppressing softening of the flesh and oil rising. For apples that have been stored for a long period of time, the oxygen concentration in the packaging member is preferably 12.0% by volume or less, preferably 10.0% by volume or less, from the viewpoint of suppressing softening of the flesh and oil rising. More preferred. Further, the oxygen concentration in the packaging member may be 5.0% by volume or less, or 4.5% by volume or less.
The oxygen concentration in the packaging member can be measured using ChecPoint3 (manufactured by MOCONEurope).

In the apple packaging of the present disclosure, the carbon dioxide concentration in the packaging member is 4.0% by volume to 10.0% by volume in the state before the packaging member is opened. For apples that have been stored for a long period of time, the carbon dioxide concentration in the packaging member is preferably 5.0% by volume or more from the viewpoint of suppressing softening of the flesh and oil rising.
The carbon dioxide concentration in the package can be measured using ChecPoint3 (manufactured by MOCONEurope).

It is preferable that the apple packaging satisfies the above conditions of carbon dioxide concentration and oxygen concentration before opening and when the environment inside the apple packaging is stable.
In the present disclosure, "a state in which the environment inside the apple packaging is stable" means that the fluctuation of the carbon dioxide concentration and the oxygen concentration in the apple packaging is -3% based on the carbon dioxide concentration and the oxygen concentration in the apple packaging 30 hours ago. It means a state of ~ + 3%.

Apple package of the present disclosure, 23 ° C., the oxygen permeability per apple 100g at 90% ^RH, is preferably ^{10cm 3 / 100g · day · atm~200cm} 3 / 100g · day · atm, 15cm 3 / more preferably ^{100g · day · atm~150cm 3 / 100g} · day · atm, even more preferably from ^{20cm 3 / 100g · day · atm~100cm} 3 / 100g · day · atm.
When the oxygen permeability is within the above range, the oxygen concentration inside the apple package can be maintained in a low state, and the respiration of the apple can be suppressed. In addition, oxygen reduced by respiration is supplied from the outside to maintain the minimum required oxygen concentration. As a result, yellowing of apple peel tends to be suitably suppressed over a long period of time.

The oxygen permeability was determined by using a differential pressure method gas permeability measuring device (GTR-30XA, GTR Tech Co., Ltd.) in an environment of 23 ° C. and 90% RH, test gas (O ₂ ) 100%, and test area 15. . Divide the oxygen permeability [cm ³ / m ^{2 · day · atm] measured as 2} cm 2 by the mass (g) of fruits and vegetables contained in the packaging member, and add 100 and the used area to the calculated value. It is a value obtained by multiplying.

Apple package of the present disclosure, 23 ° C., the carbon dioxide permeability per apple 100g at 90% ^RH, is preferably ^{30cm 3 / 100g · day · atm~500cm} 3 / 100g · day · atm, 50cm 3 / more preferably 100g · ^day · atm~450cm a 3 / 100g · day · ^atm, even more preferably from ^{70cm 3 / 100g · day · atm~400cm} 3 / 100g · day · atm.
When the carbon dioxide permeability is within the above range, the carbon dioxide increased by the respiration of the apple is released to the outside inside the apple package, the carbon dioxide concentration is appropriately adjusted, and putrefaction due to oxygen deficiency is suppressed.

The carbon dioxide permeability was determined by using a differential pressure method gas permeability measuring device (GTR-30XA, GTR Tech Co., Ltd. _{) in an environment of 23 ° C. and 90% RH, test gas (CO 2} ) 100%, and test area 15. . The carbon dioxide permeability [cm ³ / m ^{2 · day · atm] measured as 2} cm 2 is divided by the mass (g) of fruits and vegetables contained in the packaging member, and the calculated value is 100 and the area used. It is a value obtained by multiplying by.

The packaging member exhibits an excellent gas permeation effect even if it does not have pores. The smaller the number of pores that can cause the invasion of bacteria and the like from the outside, the more preferable. Specifically, the number of holes having a maximum diameter of 50 μm or more is ^{1 or less per 1 m 2} , and the number is preferably 0.
The maximum diameter and number of the holes can be confirmed visually and, if necessary, using a known scanning electron microscope, optical microscope, or the like.

The material of the packaging member is not particularly limited as long as it has carbon dioxide permeability and oxygen permeability in the above range.
In certain embodiments, the packaging member comprises a polymer having a structural unit derived from 4-methyl-1-pentene (hereinafter, also referred to as 4-methyl-1-pentene-based polymer). The 4-methyl-1-pentene polymer has a bulky molecular structure as compared with other polyolefins such as polyethylene and polypropylene, and therefore has a low density and exhibits high gas permeability. Therefore, it can be suitably used as a material for packaging members.

Even if the 4-methyl-1-pentene polymer is a homopolymer consisting of only the structural units derived from 4-methyl-1-pentene, the structural units derived from 4-methyl-1-pentene and 4 It may be a copolymer containing a structural unit derived from a component other than −methyl-1-pentene.
By changing the ratio of the structural unit derived from 4-methyl-1-pentene and the structural unit derived from components other than 4-methyl-1-pentene, the carbon dioxide permeability and oxygen permeability of the packaging member can be desired. It can be adjusted to a range.

When the 4-methyl-1-pentene polymer is a copolymer containing a structural unit derived from a component other than 4-methyl-1-pentene, the component other than 4-methyl-1-pentene may be ethylene or Α-olefins having 3 to 20 carbon atoms (excluding 4-methyl-1-pentene) are preferably used.

Specifically, as an α-olefin having 3 to 20 carbon atoms, propylene, 1-butene, 1-pentene, 1-hexene, 3-methyl-1-butene, 3-methyl-1-pentene, 1-octene , 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-eicosen and the like.
Among these, propylene is preferable from the viewpoint of availability, and 1-butene is preferable from the viewpoint of imparting heat sealability at low temperature to the packaging member.

The method for synthesizing the 4-methyl-1-pentene polymer is not particularly limited, and a known method can be adopted. When a component other than 4-methyl-1-pentene is used when synthesizing a 4-methyl-1-pentene polymer, two or more types may be used even if only one type is used as a component other than 4-methyl-1-pentene. May be used.

The packaging member may contain a 4-methyl-1-pentene polymer and a polymer other than the 4-methyl-1-pentene polymer.
By changing the blend ratio of the 4-methyl-1-pentene polymer contained in the packaging member and the polymer other than the 4-methyl-1-pentene polymer, the carbon dioxide permeability and oxygen of the packaging member can be changed. The transparency can be adjusted to a desired range.

When the packaging member contains a 4-methyl-1-pentene polymer and a polymer other than 4-methyl-1-pentene polymer, the polymer other than 4-methyl-1-pentene polymer may be used. , Polyolefin is preferable, and a homopolymer or copolymer of ethylene or α-olefin having 3 to 20 carbon atoms (excluding 4-methyl-1-pentene) is preferable.

Specifically, as a homopolymer or copolymer of an α-olefin having 3 to 20 carbon atoms, propylene, 1-butene, 1-pentene, 1-hexene, 3-methyl-1-butene, 3-methyl Examples thereof include homopolymers or copolymers such as -1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-heptadecene, 1-octadecene and 1-eicosene.
Among these, a propylene homopolymer or copolymer (propylene-based polymer) is preferable from the viewpoint of availability, and a 1-butene homopolymer from the viewpoint of imparting heat-sealing property at a low temperature to the packaging member. Alternatively, a copolymer (1-butene polymer) is preferable.

When the packaging member contains a 4-methyl-1-pentene polymer and a polymer other than the 4-methyl-1-pentene polymer, the method for blending these polymers is not particularly limited and is known. The method can be adopted. When the packaging member contains a 4-methyl-1-pentene polymer and a polymer other than the 4-methyl-1-pentene polymer, the polymer other than the 4-methyl-1-pentene polymer is 1 Only seeds may be used, or two or more seeds may be used.

The packaging member may have a single-layer structure or a multi-layer structure. For example, 4-methyl-1-pentene polymers have excellent gas permeability, but tend to have a high melting point and insufficient heat sealability at low temperatures. Therefore, in addition to the layer containing the 4-methyl-1-pentene polymer, the laminate may have a layer having excellent heat-sealing properties at low temperatures.

The packaging member may have a layer containing at least one selected from the group consisting of polypropylene, polyethylene, nylon, polyethylene terephthalate, polylactic acid and polybutylene succinate. When the packaging member is a laminate, at least one selected from the group consisting of a layer containing a 4-methyl-1-pentene polymer and a group consisting of polypropylene, polyethylene, nylon, polyethylene terephthalate, polylactic acid and polybutylene succinate. It may have a layer containing.

The thickness of the packaging member is not particularly limited. From the viewpoint of strength and handleability, it may be selected from the range of 10 μm to 100 μm.

The shape of the packaging member is not particularly limited. For example, it may be in the shape of a bag, a pack, a box, or the like.

The apple packaging of the present disclosure may be covered with a hygroscopic coating material such as paper from the viewpoint of avoiding excessive humidity inside the packaging, and may be covered with corrugated cardboard or the like from the viewpoint of transportability or the like. May be good. Further, in the apple packaging of the present disclosure, an apple covered with a covering material or the like may be wrapped with a packaging member together with the covering material from the viewpoint of avoiding moisture absorption of the apple, and from the viewpoint of transportability or the like, a corrugated cardboard or a container may be used. The apples arranged in the above may be wrapped in a packaging member together with a cardboard, a container, and the like.

Using the area of the covering member (total area of the surface facing the apple in the packaging member) is not particularly limited, for example, the area used for the packaging member may be 0.1m ² ~5.0m ² , it may be a 0.5m ² ~3.0m ^2.

The apple packaging of the present disclosure may further include at least one of an ethylene absorbent and an ethylene decomposing agent in the packaging member. As a result, it is possible to suitably suppress the oiling of apples, discoloration of the peel, and the like for a long period of time.

The apple wrapping body of the present disclosure includes an apple wrapped with a wrapping member. The varieties of apples are not particularly limited, and examples thereof include Ohrin, Golden Delicious, India, and hybrids thereof.

The mass of the apple packaged in the packaging member is not particularly limited, and may be, for example, 200 g to 30,000 g or 10,000 g to 30,000 g.

<How to store apples>
The method for storing apples of the present disclosure includes a step of storing the above-mentioned apple packaging of the present disclosure in an environment of 0 ° C. to 5 ° C.
According to the method of the present disclosure, yellowing of apple peel can be suppressed for a long period of time. The storage period in an environment of 0 ° C. to 5 ° C. may be, for example, 5 days or more, 20 days or more, or 40 days or more. The storage period in an environment of 0 ° C. to 5 ° C. may be 60 days or less.

Examples of the method of storing the apple packaging in an environment of a predetermined temperature include a method of storing the apple packaging in a storage in which the internal temperature is set to a predetermined temperature. Storage of apples may be accompanied by transport of apples.

Hereinafter, embodiments according to the present invention will be described in detail with reference to examples. The present invention is not limited to the description of these examples.

(1) Preparation of packaging materials The following packaging materials 1 to 5 were prepared as packaging materials used for producing packaging members for storing apples. Table 1 shows the physical characteristics of the packaging materials 1 to 5.

(Packaging material 1)
The surface layer (outside the bag) containing 90 parts by mass of the propylene polymer and 10 parts by mass of the 1-butene polymer, 20 parts by mass of the 4-methyl-1-pentene polymer, 56 parts by mass of the propylene polymer and 1- An intermediate layer containing 24 parts by mass of the butene polymer and a surface layer (inside the bag) containing 90 parts by mass of the propylene polymer and 10 parts by mass of the 1-butene polymer are provided in this order, and the surface layer (outside the bag) and the middle layer are provided in this order. A laminate (packaging material 1) having a layer and a surface layer (inside the bag) having thicknesses of 8 μm, 24 μm, and 8 μm (40 μm in total) was prepared.

(Packaging material 2)
The surface layer (outside the bag) containing 90 parts by mass of the propylene polymer and 10 parts by mass of the 1-butene polymer, 90 parts by mass of the 4-methyl-1-pentene polymer, 7 parts by mass of the propylene polymer and 1- An intermediate layer containing 3 parts by mass of the butene polymer and a surface layer (inside the bag) containing 90 parts by mass of the propylene polymer and 10 parts by mass of the 1-butene polymer are provided in this order, and the surface layer (outside the bag) and the middle layer are provided in this order. A laminate (packaging material 2) having a layer and a surface layer (inside the bag) having thicknesses of 10 μm, 30 μm, and 10 μm (50 μm in total) was prepared.

(Packaging member 3)
A PE-based freshness-preserving film (trade name "Pal Fresh", Mitsui Chemicals Tohcello Co., Ltd.) having a thickness of 50 μm was used as the packaging material 3.

(Packaging material 4)
A linear low-density polyethylene film (LLDPE) (trade name "TUX", Mitsui Chemicals Tohcello Corporation) having a thickness of 50 μm was used as the packaging material 4.

(Packaging material 5)
A polyethylene film for maintaining freshness (trade name "P-plus", manufactured by Sumitomo Bakelite Co., Ltd.) having a thickness of 50 μm was used as the packaging material 5.

(2) Measurement of oxygen permeability [cm ³ / m ² · day · atm] For packaging materials 1 to 5, a differential pressure method gas permeability measuring device (GTR-30XA, GTR Tech Co., Ltd.) was used at 23 ° C. and 90%. Under the condition of _{100% test gas (O 2} ) and test area 15.2 cm ² of packaging materials 1 to 5, oxygen permeability of packaging materials 1 to 5 [cm ³ / m ² day atm] ] Was measured. The results obtained are shown in Table 1.

(3) Method for measuring carbon dioxide permeability [cm ³ / m ² · day · atm] For packaging materials 1 to 5, a differential pressure method gas permeability measuring device (GTR-30XA, GTR Tech Co., Ltd.) was used at 23 ° C. Under the conditions of 90% RH, _{100% test gas (CO 2} ), and a test area of 15.2 cm ² for packaging materials 1 to 5, carbon dioxide permeability of packaging materials 1 to 5 [cm ³ / m ² ·. Day · atm] was measured. The results obtained are shown in Table 1.

(4) Measurement of the number of holes having a maximum diameter of 50 μm or more For packaging materials 1 to 5, the number of holes having a ^{maximum diameter of 50 μm or more per 1 m 2} was confirmed visually and using an optical microscope.
As a result, as shown in Table 1, no holes having a maximum diameter of 50 μm or more per ^{1 m 2 were confirmed in any of the packaging materials 1 to 4, and 33 holes were confirmed in the packaging material 5.}

[Examples 1 to 8 and Comparative Examples 1 to 4]
(Preparation of apples)
In each Example and each Comparative Example, apples (apples 2 days after harvesting) in containers having the varieties and total mass shown in Table 2 were prepared.

(Preparation of packaging)
In each Example and each Comparative Example, the packaging materials 1 to 5 were cut out, and the apples in the container were covered with the cut out packaging materials 1 to 5.
In Examples 1 to 8 and Comparative Examples 3 and 4, the open portions of the packaging materials 1 to 5 were heat-sealed (heat-sealed) using a stand sealer (model number: NL-453PS-5, Ishizaki Electric Mfg. Co., Ltd.). , A package in which apples were packaged with a packaging member (use area 2.2 m ² ) made of packaging materials 1 to 5 was obtained.
In Comparative Examples 1 and 2, the apples contained in the container were not wrapped with the packaging member.

(5) from the oxygen permeability of the packaging material 5 as shown in calculation table 1 of oxygen permeability per apple ^{100g [cm 3 / 100g · day} · atm], oxygen permeability per apple 100g for accommodating the packaging the members degree ^{[cm 3 / 100g · day ·} atm] was calculated. ^{Specifically, the oxygen permeability [cm 3} / m ² · day · atm] of the obtained packaging materials 1 to 5 is calculated by dividing by the mass (g) of the apple contained in the packaging member. was 100 and using the area 2.2 m ² the value obtained by multiplying the value, oxygen permeability per apple 100g for housing the covering member produced using the packaging material 1~5 ^[cm 3 / 100g · day・ Atm]. The calculation results are shown in Table 2.

(6) Carbon dioxide permeability per apple 100g from ^{[cm 3 / 100g · day ·} atm] carbon dioxide permeability of the packaging material 5 as shown in calculation table 1, per apple 100g for accommodating the packaging the members It was calculated carbon dioxide permeability ^{[cm 3 / 100g · day ·} atm]. ^{Specifically, it is calculated by dividing the carbon dioxide permeability [cm 3} / m ² · day · atm] of the obtained packaging materials 1 to 5 by the mass (g) of the apple contained in the packaging member. and the value obtained by multiplying the 100 and use the area 2.2 m ² to a value, the carbon dioxide permeability per apple 100g for housing the covering member produced using the packaging material 1~5 ^[cm 3 / 100g · day ・ atm]. The calculation results are shown in Table 2.

(7) Implementation of storage test The packages in each example and each comparative example were stored in a storage set at the storage temperature and humidity shown in Table 2. Then, the carbon dioxide concentration and the oxygen concentration in the packaging member were measured by the method described above. The results are shown in Table 2.
It was confirmed that the environment inside the packaging member was stable with respect to the carbon dioxide concentration and the oxygen concentration inside the packaging member.

(8) Evaluation of each item After performing the above-mentioned "(7) Implementation of storage test", the apples packaged in the packaging in each Example and each Comparative Example contain flesh hardness and acid as shown below. The amount was measured and the oiliness and discoloration of the peel were evaluated.
The results are shown in Table 2.

(Measurement of pulp hardness)
Using a fruit hardness tester (trade name: Lutron FR-5120) and using an 11 mm hardness tip, the flesh hardness of apples was measured under the condition of mode: 3 tomato.
When the value of the flesh hardness was in the range of 14 or more, it was judged that the softening of the gingiva was suppressed.

(Measurement of acid content)
The acid content of apples was measured with a sugar acidity meter (manufactured by Atago Co., Ltd.).

(Evaluation of oil finish)
The oiliness of apples after the storage test was evaluated based on the following evaluation criteria.
Oily: Glossy and sticky.
Slightly oily: slightly glossy and slightly sticky.
No oiling: Not glossy and non-greasy.

(Evaluation of pericarp discoloration)
After the storage test, it was confirmed whether or not the apples had pericarp discoloration.

As shown in Table 2, in the apple packages of Examples 1 to 8, softening of the gingiva was suppressed, and no oiling of apples and discoloration of the peel were observed.

Claims (9)

A packaging member and an apple packaged with the packaging member are provided.
In the state before opening the packaging member, the oxygen concentration in the packaging member is 0.5% by volume to 15.0% by volume, and the carbon dioxide concentration in the packaging member is 4.0% by volume to 10.0% by volume. % And
An apple package having one or less holes with a maximum diameter of 50 μm or more ^{per 1 m 2.} The apple package according to claim 1, wherein the oxygen concentration is 10.0% by volume or less. The apple packaging according to claim 1 or 2, wherein the carbon dioxide concentration is 5.0% by volume or more. 23 ° C. of the packaging member, the oxygen permeability per apple 100g at 90% ^RH, a ^{10cm 3 / 100g · day · atm~200cm} 3 / 100g · day · atm, 23 ℃, 90% RH of the package member carbon dioxide permeability per apple 100g ^{is, 30cm 3 / 100g · day ·} atm~500cm 3 / 100g · day · atm at a claim 1 apple packaging according to any one of claims 3 at. The apple packaging according to any one of claims 1 to 4, wherein the packaging member contains a polymer having a structural unit derived from 4-methyl-1-pentene. The apple packaging according to any one of claims 1 to 5, which has a layer containing at least one selected from the group consisting of polypropylene, polyethylene, nylon, polyethylene terephthalate, polylactic acid and polybutylene succinate. The apple packaging according to any one of claims 1 to 6, further comprising at least one of an ethylene absorbent and an ethylene decomposing agent in the packaging member. The apple package according to any one of claims 1 to 7, wherein the apple variety is Ohrin, Golden Delicious, India, or a hybrid thereof. A method for storing apples, which comprises a step of storing the apple packaging according to any one of claims 1 to 8 in an environment of 0 ° C. to 5 ° C.