JP3154446B2 - Package containing asparagus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an asparagus that allows asparagus to continue breathing under an appropriate oxygen atmosphere even after the asparagus is packaged in a synthetic resin film packaging bag.
The present invention relates to a package for maintaining freshness. 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 respiratory action of asparagus while maintaining conditions that suppress deterioration of quality due to oxidation by oxygen. It is.

[0002]

2. Description of the Related Art Asparagus maintains its respiratory action even after being harvested. For this reason, it is necessary to prevent the deterioration of asparagus quality during storage and distribution after harvest and until eating. In addition, asparagus is produced in a conventional manner in summer and in a greenhouse in winter. Asparagus, by its very nature, its quality deteriorates quickly, and it is transported in a styrofoam box on cold-water-absorbing paper to keep it fresh, and is opened and sold in stores. I have. What is opened, after the asparagus is packaged,
In order to perform the same breathing as in the air, the consumption of nutrients and the evaporation of water are fast, 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. Asparagus has been considered to be wrapped using such a film, but in these open packages,
It becomes equivalent to the amount of oxygen in the air, and asparagus has a large amount of oxygen, so the respiratory action of asparagus becomes active, asparagus grows further, nutrients such as vitamins are consumed, and the taste decreases. 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 asparagus and can be served on a dining 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 desirable oxygen concentration atmosphere for maintaining the freshness of asparagus for a long period of time, and to supply goods which do not generate an off-flavor, reduce nutrients and do not wither. It is the result of intensive research, providing the minimum amount of oxygen necessary for the survival of asparagus, keeping asparagus hibernating, so as to reduce the loss of nutrients and wilting, which is a disorder of high oxygen content. Another object of the present invention is to provide a packaging bag for asparagus and a package containing asparagus for supplying asparagus with high freshness.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an asparagus-containing package made of a perforated synthetic resin film in which asparagus is sealed, wherein the perforated synthetic resin film has an open area ratio of 1%.
A ^{× 10 -5 ~5 × 10 -4%} , the bag surface area per asparagus 100g is 50~600cm ^2, the holes
An asparagus containing packaging material, wherein the average pore size of 10Myu～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 asparagus packaging, but in general, unstretched polypropylene, stretched polypropylene, polyethylene,
Polyvinyl chloride, etc. are used, but other than these, such as films of polyamide, polyester, polycarbonate and the like, and further may be composite films of these, and even those provided with a sealant layer on the surface of these films There is no problem even if the film is antifogged. The thickness of these films is usually 20 to
70 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 open area ratio is determined by the amount of asparagus to be packed, and the open area ratio needs to be 1 × 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 asparagus. According to the results of experiments by the present inventors, the oxygen concentration was 3% to 15%. Desirably, the opening area ratio for satisfying these conditions is 1 × 10 ^{−5 to} 5 × 10 5.
^-4 %. If the open area ratio is 1 × 10 ⁻⁵ % or less, asparagus becomes anoxic during the distribution process due to the respiratory action after packaging and starts anaerobic respiration, generating an odor. If the open area ratio is 5 × 10 ^-4 % or more, the amount of oxygen in the packaging bag becomes too large, and under the influence of this oxygen, yellowing of asparagus and finally decay,
Further, since the amount of oxygen is large, the respiratory action of asparagus is activated, and there is a problem that asparagus grows more than necessary and consumes nutrients. Therefore, the open area ratio of the perforated film used as a packaging bag for asparagus is 1
× 10 ^-5 is required it is to 5 × 10 ^-4%, desirably from 2 × 10 ^-5 to 2 × 10 that is ^-4% range 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 20-100μ. It is desirable that the pore size is as small as possible, but if it is 10 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.

The number of holes per bag of the perforated film used for the asparagus packaging bag is calculated from the ratio of the open 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 asparagus packaging bag may be a three-sided sealing bag, a four-sided sealing bag, a gusset bag, or any other form of bag.Furthermore, trays, cups, etc. are filled with asparagus, and this is packed in a packaging bag. It may be in the form of packaging.

The size of the asparagus packaging bag is asparagus 10
The surface area in the bag must be 50 to 600 cm ² per 0 g, and preferably 100 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. When the surface area in the bag is 50 cm ² or less per 100 g of asparagus,
The density of asparagus in the bag is increased, and the asparagus is damaged by contact between the asparagus and easily browned, and the above-mentioned opening area ratio is insufficient for oxygen, resulting in anaerobic respiration, which is not preferable.
Furthermore, the surface area in the bag is 600 cm per 100 g of asparagus.
^{When it is 2} or more, the density of asparagus in the bag becomes low, the initial oxygen amount in the bag is also large, the oxygen supply amount is large in the opening area ratio, and the respiratory action of asparagus becomes active and yellowing easily occurs As a result, the nutrients of asparagus will be exhausted. In addition, the cost of the bag increases due to the large amount of the film used.

It is to be noted that, although not limited to the packaging of asparagus, the maintenance of freshness of vegetables and the like is, of course, an important point in the distribution process and the temperature control in stores, and the respiratory volume of asparagus is naturally 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 >> 30 μm in inner size of 150 × 350 mm
Into a three-sided sealed bag having 100 holes with an average hole diameter of 80 μm so that the open area ratio is 4.8 × 10 ⁻⁴ %, 250 g of aspara is filled in a packaging bag made of stretched polypropylene of the above (bag surface area). Is 150 × 350 × 2 = 105000
because it is mm ^2, the bag surface area per asparagus 100g is 42000Mm ² i.e. 420 cm ^2),
Table 1 shows the results of observing the state of odor generation and the state of browning as to freshness after 3 days and 7 days after storage at 5 ° C.

Example 2 A stretched polypropylene having a thickness of 30 μ similar to that of Example 1 was used, and the ratio of the open area was 1.1.2.
Using a packaging bag having 10 holes with an average pore diameter of 40 μm so as to be × 10 ⁻⁵ %, filling 250 g of the same asparagus used in Example 1, and 3 days and 7 days after in the same manner as in Example 1 Table 1 shows the results of examining the freshness.

Example 3 The same 30% thick stretched polypropylene as in Example 1 was used, and the open area ratio was 7.0 × 1.
The same asparagus used in Example 1 was used in a packaging bag having 26 holes with an average pore diameter of 60 μm so as to be 0 ^-5 %.
Table 1 shows the results of checking the freshness after 3 days and 7 days in the same manner as in Example 1 after filling 50 g.

<< Comparative Example 1 >> Inner size is 150 mm × 350 m
In a non-porous packaging bag made of unstretched polypropylene having a thickness of 30 μm and a thickness of 30 μm, the same asparagus used in Example 1 was used for 250 times.
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 stretched polypropylene having a thickness of 30 μ similar to that of Example 1 was used, and the open area ratio was 8.4 ×.
The same asparagus used in Example 1 was used in a packaging bag having seven holes each having an average pore diameter of 40 μm so as to be 10 ⁻⁶ %.
Table 1 shows the results of checking the freshness after 3 days and 7 days in the same manner as in Example 1 after filling 50 g.

Comparative Example 3 A stretched polypropylene having a thickness of 30 μ similar to that in Example 1 was used, and the open area ratio was 7.0 × 1.
Using a packaging bag having 94 holes having an average pore diameter of 100 μm so as to be 0 ^-4 %, and filling 250 g of asparagus as used in Example 1, freshness after 3 days and 7 days as in Example 1 was measured. The results are shown in Table 1.

[0018] Odor: ○ None, × Available Discoloration: ○ None, × Available Rot: ○ None, × Available

[0019]

By using the packaging bag of the present invention, the odor generated by anaerobic respiration of asparagus is prevented, and the digestion of nutrients by anaerobic respiration is prevented. On the other hand, yellowing and decay due to excessive oxygen are prevented. It can be stored for a long time while keeping the freshness of asparagus.

Claims (4)

(57) [Claims] 1. An asparagus-sealed package containing an asparagus-sealed perforated synthetic resin film, wherein the perforated synthetic resin film has an open area ratio of 1 × 10 ^{−5 to} 5 × 10 ⁻⁴ % and 100 g of asparagus. The surface area per bag is 50-6
00 cm ² , the pores of the perforated synthetic resin film
An asparagus-containing package having an average pore diameter of 10 to 150 μm . Wherein the number of said holes having one of the package is a plurality claim 1 Symbol placement asparagus containing packaging body. 3. The method according to claim 1, wherein the opening area ratio is 2 × 10 ⁻⁵ to 2 × 1.
0 ^-4% of claim 1 or 2 asparagus containing packaging body according. 4. asparagus containing packaging material according to claim 1, wherein the bag surface area per asparagus 100g is 100~500cm ^2.