JP3117559B2 - Package containing Moroheiya - 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 the freshness of Moroheiya by keeping the Moroheiya breathing under an appropriate oxygen atmosphere even after the Moroheiya 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 allow anaerobic respiration in a low oxygen state caused by the respiratory action of Moroheiya and that maintains conditions that suppress deterioration in quality due to oxidation by oxygen. It is.

[0002]

BACKGROUND OF THE INVENTION Moroheiya remains respiratory after harvesting. For this reason, it is necessary to prevent the quality deterioration of Moroheiya during storage and distribution after harvest and until eating. In addition, in the form of production of Moroheiya, conventional cultivation is performed in summer and cultivation in a greenhouse is performed in winter. Due to its nature, Moroheiya is rapidly deteriorated in quality, and a polypropylene open package is used to maintain freshness. After being opened, Moroheiya, after being packaged, breathes in the same manner as in the air, so that nutrients are consumed, moisture evaporates quickly, and the storage period is very short.

[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. It has been conceived to package green soybeans using such a film.However, in these open packages, the amount of oxygen in the air is equivalent to that in the air. The respiratory action becomes active, and Moloheiya grows further, consumes nutrients such as vitamins, and has a problem that the taste is deteriorated, and furthermore, there is a problem that it is easily withered due to evaporation of water. Therefore, a packaging material or a packaging method that leaves the original taste of Moroheiya and can be served on a table while keeping it fresh has not yet been discovered.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to form a desired oxygen concentration atmosphere for maintaining the freshness of Moroheiya for a long period of time, and to supply goods which do not generate off-flavors, reduce nutrients and do not wither. It has been the result of intensive research, providing the minimum amount of oxygen necessary for the survival of Moroheiya, and keeping Moroheya in a hibernating state, so as to reduce the loss of nutrients and browning, which are obstacles to high oxygen content. Another object of the present invention is to provide a packaging bag for Moroheiya and a package containing Moroheiya for supplying Moroheiya with high freshness.

[0005]

According to the present invention, there is provided a package containing a perforated synthetic resin film comprising a perforated synthetic resin film in which a perforated synthetic resin film is sealed, wherein the perforated synthetic resin film has an open area ratio of 1 × 10 ^-5 to 1 × 10 ^{5. -4} %, 100% of Moroheiya
It is a package containing Moroheiya characterized by having a bag inner surface area per g of 600 to 2000 cm ² , in particular, the average pore diameter of the pores is 20 μ to 150 μ, and the number of the pores is more than one per packaging bag. Preferably, the number is

As the perforated film used in the present invention, any film can be used as long as it can be used for wrapping Moroheiya, but in general, non-stretched polypropylene, stretched polypropylene, polyethylene, polystyrene, etc. 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. 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 Moroheiya to be packaged, and the opening area ratio is 1 × 10 ⁻⁵ to 1 × 10 ⁻⁴ %.
It is necessary to be. The reason for this is to maintain the oxygen content and the carbon dioxide gas content in the packaging bag under conditions suitable for maintaining the freshness of Moroheiya. 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 1 × 10 ⁻⁵ to 1 ×.
It becomes 10 ^-4 %. If the open area ratio is 1 × 10 ⁻⁵ % or less, Moroheiya becomes anoxic during the distribution process due to the respiratory action after packaging and starts anaerobic respiration, generating an unpleasant odor. On the other hand, if the open area ratio is 1 × 10 ⁻⁴ % or more, the amount of oxygen in the packaging bag becomes too large, which causes the browning of Moroheiya under the influence of this oxygen, and furthermore, the amount of oxygen is large. , The respiratory action of Moroheiya is activated,
There arises a problem that Moroheiya grows more than necessary and consumes nutrients. Therefore, the opening area ratio of a perforated film used as a packaging bag for Moroheiya is 1 ×
It is necessary to be 10 ^-5 to 1 × 10 ^-4 %, preferably 2 × 10 ^-5 to 8 × 10 ^-5 %, particularly preferably 3 × 10 ^-5 %.
It is more effective to be in the range of 10 ^{-5 to} 7 × 10 ^-5 .

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 and the like.

The number of holes per bag of the perforated film used for the Moroheiya 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. Further, as the packaging bag of Moroheiya, there is no problem even if it is a bag in the form of a three-sided seal bag, a four-sided seal bag or a gusset bag, and furthermore, a tray,
A form in which a cup or the like is filled with Moroheiya and this is packed in a packaging bag may be used.

The size of the packaging bag for Moroheiya is such that the surface area of the bag per 600 g of Moroheiya is 600 to 2000 cm ^2.
And preferably 800 to 1800 cm ²
It is. 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. The surface area inside the bag is 600cm per 100g of Moroheiya
^If it is less than ² , the density of Moroheiya in the bag will increase,
The contact between the morohaiyas causes damage and browning easily, and the above-mentioned open area ratio is insufficient for oxygen, resulting in anaerobic respiration, which is not preferable. Furthermore, when the surface area in the bag per 2000 g of Moroheiya becomes 2000 cm ² or more, the density of Moroheiya in the bag decreases, and the initial oxygen amount in the bag also increases,
At the above-mentioned open area ratio, the oxygen supply amount is large, the respiration of Moroheiya becomes active, and browning is likely to occur, and the nutrients of Moroheiya are consumed. In addition, the cost of the bag increases due to the large amount of the film used.

Although not limited to the packaging of Moroheiya, the maintenance of freshness of vegetables and the like is, of course, important in the distribution process and the temperature control in stores, and the breathing volume of Moroheiya is naturally important. Depends on temperature,
Although the respiratory volume increases as these temperatures increase, the present invention assumes these temperatures to be 3-22 ° C.

[0012]

【Example】

<< Example 1 >> 200 mm × 350 mm in inner size, thickness 3
In a three-side seal bag having 27 holes with an average pore diameter of 80 μm so that the open area ratio is 9.7 × 10 ⁻⁵ %, 100 morroheiya is placed in a packaging bag made of 0 μm stretched polypropylene.
g (the surface area in the bag is 200 × 350 × 2 = 1400
Because it is 300 mm ^2, the bag surface area per Jew 100g is 140000Mm ² i.e. 1400 cm ²
It was stored at 5 ° C., and the results of observing the state of odor generation and the state of browning three days and seven days later are shown in Table 1.

Example 2 A packaging bag having the same size as that of Example 1 is made of stretched polypropylene having a thickness of 30 μm, and has an average pore diameter of 4 so that the open area ratio is 1.3 × 10 ⁻⁵ %.
Using a packaging bag having 14 0 μm holes, 100 g of Morohayer similar to that used in Example 1 was filled, and freshness after 3 days and 7 days was examined in the same manner as in Example 1. Table 1 shows the results.

Example 3 A packaging bag having the same size as that of Example 1 is made of a stretched polypropylene having a thickness of 30 μm, and has an average pore diameter of 6 so that the opening area ratio is 3.6 × 10 ⁻⁵ %.
Using a packaging bag having 18 holes of 0 μm, 100 g of Morohayer similar to that used in Example 1 was filled, and the freshness after 3 days and 7 days was examined in the same manner as in Example 1. Table 1 shows the results.

<< Comparative Example 1 >> Inner dimensions 200 mm × 350 m
In a non-porous packaging bag made of stretched polypropylene having a thickness of 30 μm and a thickness of 100 μm, the same Moroheiya as used in Example 1 was placed for 100 hours.
Table 1 shows the results of examining freshness after 3 days and 7 days in the same manner as in Example 1.

<< Comparative Example 2 >> A packaging bag of the same size as that of Example 1, using a stretched polypropylene having a thickness of 30 μm,
Using a packaging bag in which 10 holes having an average hole diameter of 40 μ were opened so that the open area ratio was 9.0 × 10 ⁻⁶ %, 100 g of Moroheiya similar to that used in Example 1 was filled. Table 1 similarly shows the results of examining the freshness after 3 days and 7 days.

Comparative Example 3 A packaging bag having the same size as that of Example 1 is made of a stretched polypropylene having a thickness of 30 μm, and has an average pore diameter of 1 so that the open area ratio is 2.0 × 10 ⁻⁴ %.
Table 1 shows the results of examining the freshness after 3 days and 7 days as in Example 1 by filling 100 g of the same Morohaiya used in Example 1 using a packaging bag having 35 holes of 00 μm.

[0018]

[Table 1]

[0019]

By using the packaging bag of the present invention, the odor generated by anaerobic respiration of Moroheiya can be prevented,
Moreover, nutrients can be prevented from being digested by anaerobic respiration, while browning due to excess oxygen can be prevented, and Moroheiya can be stored for a long time while maintaining its freshness.

Claims (5)

(57) [Claims] The present invention relates to a package containing a perforated synthetic resin film comprising a perforated synthetic resin film in which a perforated synthetic resin film is sealed, and wherein the perforated synthetic resin film has an open area ratio of 1 × 10 ^-5 to 1 × 10 ^-4.
%, And the surface area in the bag per 100 g of Moroheiya is 6%.
A package containing Moroheiya having a size of from 00 to 2000 cm ² . 2. The package according to claim 1, wherein the perforated synthetic resin film has an average pore diameter of 20 to 150 μm. 3. The package containing Moroheiya according to claim 1, wherein the number of the holes in one package is plural. 4. The method according to claim 1, wherein the opening area ratio is 2 × 10 ⁻⁵ to 8 × 1.
0 ^-5% is claimed in claim 1, 2 or 3 Molokheiya containing packaging body according. 5. The package containing Moroheiya according to claim 1, wherein the inside surface area of the bag per 100 g of Moroheiya is 800 to 1800 cm ² .