JP3117558B2 - Broccoli 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 of broccoli by maintaining a respiratory action under an appropriate oxygen atmosphere even after the broccoli 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 prevents anaerobic respiration in a low oxygen state caused by broccoli's respiratory action, and also maintains conditions that suppress deterioration in quality due to oxidation by oxygen. It is.

[0002]

2. Description of the Related Art Broccoli maintains a respiratory action even after being harvested. For this reason, it is necessary to prevent the quality of broccoli from deteriorating during storage and distribution after harvest and until eating. In addition, broccoli is produced in a conventional manner in summer and in a greenhouse in winter. Broccoli, by its nature, has a rapid deterioration in quality, and a polypropylene open packaging is used to maintain freshness. When the broccoli is opened, the broccoli, after being packaged, breathes in the same manner as in the air, so that nutrients are consumed and water 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. Packaging of broccoli using such a film has been considered.However, in these open packages, the amount of oxygen in the air is equivalent to that of broccoli. There is a problem that broccoli grows more, the nutrients such as vitamins are consumed, the taste is reduced, and furthermore, the broccoli tends to wither due to evaporation of water. Therefore, a packaging material and a packaging method that leave the original taste of broccoli and can be served on a table while maintaining a fresh state have not been discovered yet.

[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 broccoli for a long period of time, and to supply products 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 broccoli to survive and keeping broccoli in a hibernating state, thus reducing nutrient loss and yellowing, which are disorders of high oxygen content. hand,
An object of the present invention is to provide a broccoli packaging bag and a broccoli-containing package for supplying broccoli with high freshness.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a broccoli-containing package made of a perforated synthetic resin film in which broccoli is sealed, wherein the perforated area of the perforated synthetic resin film is 1 × 10 ^-5 to 1 × 10 ^{5. -4} %, and a broccoli-containing package characterized by having a bag inner surface area per 100 g of broccoli of 100 to 700 cm ² ,
In particular, the average pore diameter of the pores is 20μ ~ 150μ,
It is preferable that the number of the holes is plural per one 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 broccoli, but generally unstretched polypropylene, stretched polypropylene, polyethylene, poly 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 broccoli to be packaged, and the opening area ratio is 1 × 10 ⁻⁵ to 1 × 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 spinach. 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
× 10 ^-4 %. If the open area ratio is 1 × 10 ⁻⁵ % or less, broccoli becomes anaerobic during the distribution process due to the respiratory action after packaging and starts anaerobic respiration, generating an odor. If the open area ratio is 1 × 10 ⁻⁴ % or more, the amount of oxygen in the packaging bag becomes too large. Under the influence of this oxygen, the broccoli yellows and finally rots. Since the amount of oxygen is large, broccoli's respiratory action is activated, causing a problem that broccoli grows more than necessary and consumes nutrients. Therefore, the aperture area ratio of the perforated film used as a packaging bag for broccoli needs to be 1 × 10 ^-5 to 1 × 10 ^-4 %, and preferably 2 × 10 ^{-5 to} 7 × 10 4.
^-5 %, particularly desirably in the range of 3 × 10 ^{-5 to} 6 × 10 ^-5 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 and the like.

[0009] The number of holes per bag of the perforated film used for the broccoli 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. Also, as a broccoli packaging bag,
A bag in the form of a three-sided seal bag, a four-sided seal bag, a gusset bag or the like may be used without any problem.Moreover, a tray, a cup, or the like may be filled with broccoli and then packed in a packaging bag. Good.

[0010] The size of the packaging bag for broccoli has a bag inner surface area of 100 to 700 cm ² per 100 g of broccoli.
And preferably 200 to 600 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. The surface area in the bag is 100c per 100g of broccoli
If it is less than m2, the density of broccoli in the bag becomes high, and the broccoli is damaged by contact between the broccoli and browns easily. In addition, broccoli 100
When the bag surface area per g is 700 cm ² or more, the density of broccoli in the bag decreases, the initial oxygen amount in the bag increases, and the oxygen supply rate increases in the opening area ratio, and the respiratory action of broccoli decreases. Becomes active and easy to yellow,
Broccoli is running out of nutrients. In addition, the cost of the bag increases due to the large amount of the film used.

Although the broccoli is not limited to packaging, it is important to maintain the freshness of vegetables and the like in the distribution process and at the store, and naturally the broccoli breathing volume is also important. Depending on the temperature, the respiratory volume increases as these temperatures increase, but the present invention assumes these temperatures to be between 3 and 20 ° C.

[0012]

【Example】

<< Example 1 >> 200 mm × 200 mm in inner size, thickness 2
Twenty pieces of broccoli were placed in a three-side sealed bag in which 15 holes having an average diameter of 80 μm were opened in a packaging bag made of ⁵ μm stretched polypropylene so that the open area ratio was 9.4 × 10 ⁻⁵ %.
0 g filling (the surface area in the bag is 200 × 200 × 2 = 800
Table because it is 300 mm ^2, the bag surface area per broccoli 100g is 40000 mm ² i.e. 400 cm ^2), and stored at 5 ° C., 3 days and freshness odor occurrence after 7 days, the result of observation of the browning situation It is shown in FIG.

Example 2 A packaging bag having the same size as that of Example 1 is made of a stretched polypropylene having a thickness of 25 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 eight 0 μ holes, 200 g of the same broccoli as 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.

Example 3 A packaging bag having the same size as that of Example 1 is made of a stretched polypropylene having a thickness of 25 μm, and has an average pore size of 6 so that the opening area ratio is 2.8 × 10 ⁻⁵ %.
Using a packaging bag having eight 0 μ holes, 200 g of the same broccoli as 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 × 200 m
The same broccoli used in Example 1 was placed in a non-porous packaging bag made of unstretched polypropylene having a thickness of 25 μm and a thickness of 25 μm.
Table 1 shows the results of examining the 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 stretched polypropylene having a thickness of 25 μm,
200 g of the same broccoli as used in Example 1 was filled using a packaging bag having three holes with an average hole diameter of 40 μm so that the open area ratio was 4.7 × 10 ⁻⁶ %. 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 25 μm, and has an average pore diameter of 1 so that the open area ratio is 1.8 × 10 ⁻⁴ %.
Using a packaging bag having 18 holes of 00 μ and filling 200 g of the same broccoli as used in Example 1,
Table 1 shows the results of examining the freshness after 3 days and 7 days as described above.

[0018]

[Table 1]

[0019]

By using the packaging bag of the present invention, the odor generated due to anaerobic respiration of broccoli is prevented, and the digestion of nutrients by anaerobic respiration is prevented.
Prevents yellowing and rot due to excessive oxygen, and preserves broccoli for a long time while maintaining freshness.

Claims (5)

(57) [Claims] 1. A broccoli-containing package made of a perforated synthetic resin film in which broccoli is sealed, wherein the perforated area ratio of the perforated synthetic resin film is 1 × 10 ^-5 to 1 × 1.
0 and ^-4%, broccoli containing packaging material bag surface area per broccoli 100g is characterized in that it is a 100~700cm ^2. 2. The package containing broccoli according to claim 1, wherein the average pore diameter of the pores of the perforated synthetic resin film is 20 to 150 μm. 3. The package containing broccoli 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} 5 × 1.
0 ^-5% claim 1, 2 or 3 broccoli containing packaging body according. 5. A package containing broccoli according to claim 1, wherein the bag has a surface area of 200 to 600 cm ² per 100 g of broccoli.