JPH06125696A - Green soybean-containing packaging body - Google Patents

Abstract

PURPOSE:To obtain the subject packaging body having perforated area ratio of a perforated synthetic resin film and surface area in a bag each being in a specific range, hermetically sealing green soybeans therein and capable of preventing odor owing to anaerobic respiration and browning and greening of green soybean owing to excess oxygen. CONSTITUTION:Green soybeans is packed so that surface area in a bag may be 200-600cm<2> based on 100g green soybean in a three-way sealed bag of a perforated synthetic resin film obtained by boring 11 holes having 80mum average diameter through a packaging bag consisting of stretched polypropylene having 150mmX200mm inner size and 25mum thickness so as to have 1X10<-5> to 1X10<-4> perforated area ratio and hermetically be sealed to provide the objective green soybean-containing packaging body capable of preventing odor owing to anaerobic respiration and browning and greening of green soybean owing to excess oxygen and capable of serving on the table while leaving original taste of green soybean and keeping fresh state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package for keeping freshness by continuing the breathing action of edamame in an appropriate oxygen atmosphere even after the edamame is packaged in a synthetic resin film packaging bag. It is about. More specifically, the present invention relates to a package that maintains an oxygen atmosphere that does not cause anaerobic breathing in a low oxygen state due to the respiratory action of edamame, and that also retains conditions that suppress deterioration of quality due to oxidation by oxygen. Is.

[0002]

2. Description of the Related Art Green soybeans maintain their respiratory action even after being harvested. Therefore, it is necessary to prevent the quality deterioration of edamame during storage / distribution after harvest and before eating. In addition, edamame is grown in the usual manner in the summer and in the greenhouse in the winter. Edamame is, by its nature,
The quality deteriorates quickly and polypropylene-based hermetically sealed packaging is used to maintain freshness. After being packaged, green soybeans are packaged and then exposed to an oxygen-free atmosphere.
I have been forced to breathe anaerobically,
Due to the anaerobic respiration, sugars in edamame are digested, and alcohol, aldehydes, etc. are generated, so that most of them have an offensive odor when opened.

Further, regarding plant materials such as general vegetables,
A method using an apertured film has been proposed as a method of supplying oxygen and maintaining freshness (JP-A-62-148247).
JP-A-63-119647), but these films have an extremely large open area ratio of 2 × 10 ⁻² to 2 × 10%,
Even if the film is wrapped with these films, the oxygen in the bag is almost the same as in the atmospheric state and is the same as in the open state. It has been considered to package edamame using such a film, but in the case of packaging close to these open, the amount of oxygen in the air becomes equal, and edamame has a large amount of oxygen, so edamame Has a problem that edamame grows further, sugar content is consumed, the taste is deteriorated, and moreover, it is easily withered due to evaporation of water. Therefore, a packaging material and a packaging method that retain the original taste of edamame and can be served on a table while maintaining a fresh state have not yet been discovered.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a product which forms a desirable oxygen concentration atmosphere for keeping the freshness of edamame for a long time, does not produce an offensive odor, has a reduced sugar content and is not withered. It was made as a result of earnest research,
By supplying the minimum amount of oxygen necessary for the survival of edamame and keeping the edamame in a hibernating state, the edamame for supplying fresh edamame to suppress the decrease in sugar content and browning which are obstacles of high oxygen content. The point is to provide a packaging bag and a package containing edamame.

[0005]

According to the present invention, in a package containing edamame, which comprises a perforated synthetic resin film in which edamame is sealed, the perforated synthetic resin film has an open area ratio of 1 × 10 ^−5.
It is ˜1 × 10 ⁻⁴ %, and the surface area inside the bag per 100 g of edamame is 200 to 600 cm ^2, which is a package containing edamame, and in particular, the average pore size of the pores is 20 μm.
It is preferable that the number of the holes is plural, and the number of the holes is plural per one packaging bag.

The perforated film used in the present invention may be any one as long as it can be used for packaging edamame, but in general, unstretched polypropylene, stretched polypropylene, polyethylene, poly Vinyl chloride, etc. are used, but other films such as polyamide, polyester, polycarbonate, etc.,
Further, these composite films may be used, and further, a film provided with a sealant layer on the surface of these films or an anti-fog film may be used. The thickness of these films is usually 20-40.
μ is used. Further, these films may be transparent or opaque, and may be printed on the surface without any problem.

A packaging bag using the perforated film of the present invention is
The open area ratio is determined by the amount of green soybeans to be packed, and the open area ratio needs to be 1 × 10 ⁻⁵ to 1 × 10 ⁻⁴ %. The reason for this is to keep the amount of oxygen and the amount of carbon dioxide in the packaging bag under conditions suitable for keeping the freshness of edamame. From the experimental results of the present inventors, it was found that the oxygen concentration was 3% or more and 15% or less. Desirably, the opening area ratio for satisfying these conditions is 1 × 10 ⁻⁵ to 1 × 10 ⁻⁴ %. When the open area ratio is 1 × 10 ⁻⁵ % or less, the edamame becomes anoxic during the distribution process due to the breathing action after packaging, and begins to anaerobically breathe, producing an offensive odor. Further, if the open area ratio is 1 × 10 ⁻⁴ % or more, the oxygen content in the packaging bag becomes too large, and the oxygen content affects the browning phenomenon of edamame. However, the respiration of edamame is activated, and the problem arises that edamame grows more than necessary and the sugar content is exhausted. Therefore, the perforated area ratio of the perforated film used as a packaging bag for edamame must be 1 × 10 ⁻⁵ to 1 × 10 ⁻⁴ %, preferably 2 × 10 ⁻⁶ to 8 × 10 ^−. It is more effective that it is ⁵ %, particularly preferably in the range of 3 × 10 ^{−5 to} 6 × 10 ⁻⁵ .

It is desirable that the average diameter of the holes in the perforated film is as small as possible.
It is about 150 μ, preferably 30 to 100 μ. It is desirable that the pore diameter is as small as possible, but if it is 20 μm or less, the productivity of the perforated film is lowered. The average pore size is 1
If it is 50 μm or more, the number of holes required to obtain an appropriate open area ratio is reduced, and there is concern about the quality accuracy of freshness preservation. Also, the shape of the holes can be circular, square, triangular, etc.
It may have any shape, and the average diameter in the major axis direction is 1
If it is 50 μm or less, there is no problem, but a circular shape is preferable from the viewpoint of workability of opening.

The number of holes per bag of the perforated film used for the edamame packaging bag is calculated from the open area ratio and the average hole diameter, but it is desirable to use a plurality of holes as much as possible. Since the holes may be blocked by adhesion of contents or external conditions such as attachment of price list, it is preferable to have multiple holes to ensure freshness, and more than 5 holes per bag, It is desirable that the degree of influence per hole is 20% or less. Moreover, as a packaging bag of edamame, a three-sided seal bag,
The bag may be in the form of a four-sided sealed bag, a gusset bag, or the like, and may be in the form of filling edamame into a tray, a cup, or the like, and packaging the edamame in a packaging bag.

The size of the packaging bag for edamame must be such that the surface area inside the bag is 200 to 600 cm ² per 100 g of edamame, and preferably 300 to 500 cm ² . The inner surface area of the bag is specified so that the seal portion, that is, the binding margin is not included in the calculation. Edamame 100g
When the surface area per bag is 300 cm ² or less, the density of edamame in the bag becomes high, scratches are caused by the contact between the edamame beans, and browning is likely to occur. Oxygen deficiency is caused by the above open area ratio and anaerobic breathing occurs. It is not desirable to fall into. Furthermore, edamame 10
When the surface area in the bag per 0 g is 600 cm ² or more, the density of green soybeans in the bag becomes low, the initial oxygen amount in the bag is large, and the oxygen supply amount is large in the above-mentioned open area ratio, so that the respiratory action of green soybeans is increased. It becomes active and browns easily, and the sugar content of beans is exhausted. In addition, since the amount of film used is large, the cost of the bag is high.

Although not limited to edamame packaging,
To maintain the freshness of vegetables, etc., of course, the distribution process and temperature control at the store are important points, and the respiration rate of edamame naturally depends on these temperatures, and the respiration rate increases as these temperatures increase. However, the present invention assumes these temperatures of 3 to 20 ° C.

[0012]

【Example】

<< Example 1 >> Thickness 2 with inner dimensions of 150 mm x 200 mm
A three-sided sealed bag, in which a packing bag made of ⁵ μm drawn polypropylene and 11 holes with an average pore size of 80 μm was opened so that the open area ratio was 9.2 × 10 ⁻⁵ %, was filled with 200 g of edamame (in the bag). Surface area is 150 x 200 x 2 = 60000 mm
^Since it is ² , the surface area inside the bag is 30 per 100 g of edamame.
300 mm ² i.e. 300 cm ^2), and stored at 5 ° C., the freshness of the 3 days and 7 days after observing odor occurrence, browning and greening conditions, and the results are shown in Table 1.

Example 2 A packaging bag having the same size as in Example 1, which uses stretched polypropylene having a thickness of 25 μm and an average pore diameter of 4 so that the open area ratio is 1.1 × 10 ⁻⁵ %.
Using a packaging bag having five 0 μ holes, 200 g of the same green soybeans as used in Example 1 was filled, and freshness after 3 and 7 days was examined in the same manner as in Example 1, and the results are shown in Table 1.

Example 3 A packaging bag having the same size as in Example 1, which uses stretched polypropylene having a thickness of 25 μm and has an average pore diameter of 6 so that the open area ratio is 3.3 × 10 ⁻⁵ %.
Using a packaging bag having seven 0 μ holes, 200 g of the same edamame beans as used in Example 1 was filled, and freshness after 3 and 7 days was examined in the same manner as in Example 1, and the results are shown in Table 1.

<< Comparative Example 1 >> Inner size is 150 mm × 200 m
In a non-porous packaging bag made of unstretched polypropylene having a thickness of 25 μm, 200 g of edamame similar to that used in Example 1 was filled, and freshness after 3 days and 7 days was examined as in Example 1. It shows in Table 1.

Comparative Example 2 A packaging bag having the same size as that of Example 1, using a polypropylene having a thickness of 25 μm and having an average pore diameter of 2 so that the open area ratio is 5.2 × 10 ⁻⁶ %.
Using a packaging bag having one 0 μ hole, 200 g of the same edamame as used in Example 1 was filled, and freshness after 3 and 7 days was examined in the same manner as in Example 1, and the results are shown in Table 1.

Comparative Example 3 The same unstretched polypropylene having a thickness of 25 μm as in Example 1 was used, and the open area ratio was 5.2 ×.
Using a packaging bag in which 40 holes having an average pore diameter of 100 μ were opened so as to be 10 ⁻⁴ %, 2 green soybeans similar to those used in Example 1 were used.
Table 1 shows the results of examining the freshness after 3 days and 7 days of filling with 00 g, as in Example 1.

[0018]

[Table 1]

[0019]

EFFECT OF THE INVENTION By using the packaging bag of the present invention, the odor generated due to the anaerobic respiration of edamame is prevented, and further, the digestion of sugars due to the anaerobic respiration is prevented, while the browning and greening due to excess oxygen are prevented. , It can be stored for a long time while keeping the freshness of edamame.

Claims (5)

[Claims] 1. A edamame-containing package comprising a perforated synthetic resin film in which edamame is sealed, wherein the perforated synthetic resin film has an open area ratio of 1 × 10 ⁻⁵ to 1 × 10 ⁻⁴ % and 100 g of soybeans. Surface area per bag is 200 to 600 cm ²
A package containing edamame, characterized by being 2. The edamame-containing package according to claim 1, wherein the perforated synthetic resin film has an average pore diameter of 20 to 150 μm. 3. The edamame-containing package according to claim 1 or 2, wherein one package has a plurality of the holes. 4. The opening area ratio is 2 × 10 ⁻⁵ to 8 × 1.
The edamame-containing package according to claim 1, 2 or 3, which is 0 ^-5 %. 5. The bag has a surface area of 30 per 100 g of soybeans.
The edamame-containing package according to claim 1, 2, 3 or 4, which has a size of 0 to 500 cm ² .