JP3154441B2 - Banana package - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package for maintaining freshness by keeping a banana breathing under an appropriate oxygen atmosphere even after the banana 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 respiration in a low oxygen state caused by the respiration of bananas, and that maintains conditions that suppress deterioration in quality due to oxidation by oxygen. It is.

[0002]

2. Description of the Related Art Bananas maintain their respiratory action even after being harvested. For this reason, it is necessary to prevent the deterioration of banana quality during storage and distribution after harvest and until eating.
Bananas are grown and imported in southern countries.
Because of the nature of bananas, their quality deteriorates quickly, so they are harvested in immature state, and after arriving in Japan they are treated with alcohol.
Let it mature. A polyethylene perforated bag is used to maintain the freshness thereafter. Even after bananas are packaged, they are almost the same as those stored in the air, and sugar spots tend to occur on the banana surface.

[0003] Further, regarding plant materials such as general vegetables,
As a method for supplying oxygen and maintaining freshness, a method using a perforated film has been proposed (JP-A-62-148247,
JP-A-63-119647 discloses that these films have an extremely large aperture 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 the atmospheric state, which is the same as the open state. Packaging of bananas using such a film has also been considered, but in these open packages, the amount of oxygen in the air is equivalent to the amount of oxygen in the air. There is a problem that the respiratory action becomes active, bananas grow further, sugar is consumed, and the taste is reduced, and furthermore, there is a problem that water is easily lost due to evaporation of water. Therefore, a packaging material and a packaging method that leave the original taste of a banana and can be served on a table while maintaining a fresh state have not been discovered yet.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to form a desirable oxygen concentration atmosphere for keeping freshness of a banana for a long period of time, and to supply goods which do not generate an off-flavor, have a low sugar content, and do not wilter. It has been the result of extensive research, providing the minimum amount of oxygen necessary for the survival of bananas, and keeping the bananas in a hibernating state, so as to suppress the decrease in sugar content and browning, which are obstacles to high oxygen content. Another object of the present invention is to provide a banana packaging bag and a banana-containing package for supplying bananas with high freshness.

[0005]

According to the present invention, there is provided a banana-containing package comprising a perforated synthetic resin film in which a banana is sealed, wherein the perforated synthetic resin film has an open area ratio of 5 × 1.
0 is ^{-5 ~5} × 10 ^-4%, the bag surface area per banana 100g is 100~600cm ^2, the average of the pore
Pore size is banana-filled packaging body which is a 20Myu～150myu, especially, it is preferable the number of that hole is plural per packaging bag.

As the perforated film used in the present invention, any film can be used as long as it can be used for packaging bananas. Vinyl chloride, etc. are used, but other than these, such as films of polyamide, polyester, polycarbonate, etc., or even a composite film of these may be used, and even those provided with a sealant layer on the surface of these films, There is no problem even if the film is subjected to anti-fog treatment. The thickness of these films is usually 20 to
40 μm is used. Further, these films may be transparent or opaque, and there is no problem even if the film is printed on the surface.

A packaging bag using the perforated film of the present invention is:
The opening area ratio is determined by the amount of bananas to be packed, and the opening area ratio needs to be 5 × 10 ^{−5 to} 5 × 10 ⁻⁴ %. The reason for this is to maintain the amount of oxygen and carbon dioxide in the packaging bag under conditions suitable for maintaining the freshness of the banana. According to the experimental results of the present inventors, the oxygen concentration was 3% or more and 15% or less. Desirably, the opening area ratio for satisfying these conditions is 5 × 10 ^{−5 to} 5 × 10 ⁻⁴ %.
Becomes If the open area ratio is 5 × 10 ⁻⁵ % or less, the banana becomes anaerobic during the distribution process due to the respiratory action after packaging and starts anaerobic respiration, generating an odor. On the other hand, if the opening area ratio is 5 × 10 ⁻⁴ % or more, the amount of oxygen in the packaging bag becomes too large, which causes the banana browning phenomenon due to the influence of this oxygen, and furthermore, the amount of oxygen is large. This causes a problem that the respiration of the banana is activated, the banana grows more than necessary, and the sugar is consumed.
Therefore, the aperture area ratio of the perforated film used as a banana packaging bag needs to be 5 × 10 ^{−5 to} 5 × 10 ⁻⁴ %, preferably 7 × 10 ^{−5 to} 3 × 10 ^{−. Four}
% Is more effective.

It is desirable that the average diameter of the holes in the perforated film is as small as possible.
It is about 150μ, preferably 30-100μ. 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 reduced. In addition, the average pore diameter is 1
If it is 50 μm or more, the number of holes required to obtain an appropriate opening area ratio decreases, and the quality accuracy of maintaining freshness becomes uneasy. Also, the shape of the hole, such as a circle, square or triangle,
Any shape may be used, and the average diameter in the major axis direction is 1
There is no problem if it is 50 μm or less, but a circular shape is preferable from the viewpoint of hole opening workability.

Further, the number of holes per bag of the perforated film used for the banana packaging bag is calculated from the ratio of the opening area and the average hole diameter.
Holes may be blocked due to adhesion of contents or external conditions such as the attachment of a price list. To ensure freshness, a plurality of holes are preferable, and more than 5 holes per bag, It is desirable that the degree of influence per hole be 20% or less. The banana packaging bag may be a three-sided sealed bag, a four-sided sealed bag, a gusset bag, or any other bag.Furthermore, trays, cups, etc. are filled with banana, and this is packed in a packaging bag. It may be in the form of packaging.

[0010] The size of the banana packaging bag is 100 g banana
The surface area per bag must be 100 to 600 cm ² , and preferably 200 to 500 cm ² . The reason for defining the inner surface area of the bag is to prevent the sealing portion, that is, the binding margin from being included in the calculation. Banana 10
If the surface area in the bag per 100 g is 100 cm ² or less, the density of the bananas in the bag increases, the bananas are scratched by contact between the bananas, and are liable to be browned. It is not preferable because it falls into breathing. Furthermore,
When the surface area in the bag per 600 g of banana is 600 cm ² or more, the density of the banana in the bag becomes low, the amount of oxygen in the bag in the initial stage is large, and the oxygen supply amount is large in the opening area ratio described above. Becomes active and easily browns,
The sugar content of the beans will be depleted. In addition, the cost of the bag increases due to the large amount of the film used.

[0011] It should be noted that the present invention is not limited to banana packaging, but of course, in maintaining the freshness of vegetables and the like, the distribution process and the temperature control in stores are important points, and the respiration of the banana is naturally important. It depends on temperature, and as these temperatures increase, their respiration increases,
The present invention assumes that these temperatures are 10 to 25 ° C.

[0012]

【Example】

<< Example 1 >> 200 mm × 200 mm inside thickness, thickness 3
600 g of banana is filled in a three-side seal bag in which 75 holes having an average pore diameter of 80 μ are opened in a packaging bag made of 0 μm stretched nylon and stretched polystyrene so that the open area ratio is 4.7 × 10 ⁻⁴ %. (The surface area in the bag is 200 × 200 × 2 =
Because it is 80000Mm ^2, bag surface area per banana 100g is 13300Mm ² That 133cm ^2), and stored at 20 ° C., the freshness after two days and five days were observed odor, sugar spots occurrence, the sugar content Table 1 shows the results.

<< Embodiment 2 >> The same internal dimension as in Embodiment 1 is 20
Using a stretched nylon and a stretched polystyrene having a thickness of 0 μm × 200 mm and a thickness of 30 μm, an opening area ratio is 5.3 × 10 ^−5.
% Of the same banana as used in Example 1 using a packaging bag having 15 holes with an average pore size of 60 μm.
Table 1 shows the results of checking the freshness after 2 days and 5 days after filling and filling in the same manner as in Example 1.

<< Embodiment 3 >> The same internal dimension as in Embodiment 1 is 20
Using a stretched nylon and a stretched polystyrene of 0 mm × 200 mm and a thickness of 30 μm, an opening area ratio is 3.1 × 10 ^−4.
% Of the same banana as used in Example 1 using a packaging bag having 50 holes with an average pore diameter of 80 μm.
Table 1 shows the results of checking the freshness after 2 days and 5 days after filling and filling in the same manner as in Example 1.

<< Comparative Example 1 >> Inner dimensions 200 mm × 200 m
m, stretched nylon and stretched polystyrene having a thickness of 30 μm, filled with 600 g of the same banana as used in Example 1, using a non-porous packaging bag, and freshness after 2 days and 5 days as in Example 1. Are shown in Table 1.

<< Comparative Example 2 >> The same internal dimension as in Example 1 was 20
Using a stretched nylon and a stretched polystyrene having a thickness of 0 μm × 200 mm and a thickness of 30 μm, the open area ratio is 3.5 × 10 ^−5.
% Of the same banana as used in Example 1 using a packaging bag having 10 holes with an average pore diameter of 60 μm.
Table 1 shows the results of checking the freshness after 2 days and 5 days after filling and filling in the same manner as in Example 1.

<< Comparative Example 3 >> The same internal dimension as in Example 1 was 20
Using a stretched nylon and a stretched polystyrene having a thickness of 0 μm × 200 mm and a thickness of 30 μm, and having an opening area ratio of 5.9 × 10 ^−4.
% Of the same banana as used in Example 1 using a packaging bag in which 60 holes having an average pore size of 100 μ were opened.
Table 1 shows the results of examining the freshness after 2 days and 5 days in the same manner as in Example 1.

<< Comparative Example 4 >> The same internal dimensions as in Example 1 were 20
Using 0 mm × 200 mm stretched nylon and stretched polystyrene having a thickness of 30 μm, and using a packaging bag having an open top, filling 600 g of the same banana as used in Example 1 for 2 days as in Example 1. Table 1 shows the results of examining the freshness after 5 days.

[0019]

[Table 1]

[0020]

By using the packaging bag of the present invention, it is possible to prevent the odor generated due to the anaerobic respiration of banana beans, and also to prevent the digestion of the sugar due to the anaerobic respiration, while preventing the sugar spot due to the excessive oxygen. It can be stored for a long time while keeping the freshness of the banana.

Claims (4)

(57) [Claims] In a banana-containing package made of a perforated synthetic resin film in which a banana is sealed, the perforated synthetic resin film has an open area ratio of 5 × 10 ^{−5 to} 5 × 10 ⁻⁴ % and 100 g of banana. The surface area per bag is 100-60
0 cm ² and the flatness of the hole of the perforated synthetic resin film.
A banana-containing package having a uniform hole diameter of 20 to 150 μm . Wherein the number of said holes having one of the package is a plurality claim 1 Symbol placement banana containing packaging body. 3. The method according to claim 1, wherein the opening area ratio is 7 × 10 ^{−5 to} 3 × 1.
The banana-containing package according to claim 1 or 2, which is ^0-4 %. 4. The bag has a surface area of 2 per 100 g of banana.
Bananas containing packaging body according to claim 1, 2 or 3 wherein the 00~500cm ^2.