JPH06125698A - Packaged material containing broccoli - Google Patents

Abstract

PURPOSE:To obtain the subject packaged material capable of preventing a smell caused by anaerobic respiration and yellowing resulting from excessive oxygen for a long period of time by sealing broccoli in a porous synthetic resin film having an open hole area ratio and a surface area in a bag in specific ranges. CONSTITUTION:A three-way sealed bag comprises a porous synthetic resin film obtained by boring 15 holes having 80mum average hole diameter through a packaging bag composed of a drawn polypropylene having 200mm X 200mm inner dimension and 25mum thickness so as to give 1X10<-5> to 1X10<-4>% open hole area ratio. Broccoli is packed and sealed in this three-way sealed bag so as to give 100-700cm<2> inner surface area in the bag based on 100g broccoli to give the objective packaged material containing broccoli capable of preventing a smell caused by anaerobic respiration and yellowing resulting from excessive oxygen for a long period of time and being supplied to a table while leaving taste characteristic of broccoli and maintaining a 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 maintaining the freshness of broccoli by keeping the breathing action in an appropriate oxygen atmosphere even after the broccoli is packaged in a packaging bag of synthetic resin film. It is about. More specifically, the present invention relates to a package that holds an oxygen atmosphere that does not cause anaerobic breathing in a low oxygen state due to the breathing action of broccoli, and that also retains conditions that suppress deterioration of quality due to oxidation by oxygen. Is.

[0002]

BACKGROUND OF THE INVENTION Broccoli continues its respiratory action after being harvested. Therefore, it is necessary to prevent quality deterioration of broccoli during storage / distribution after harvest and before eating. Broccoli is normally grown in summer and grown in a greenhouse in winter. Due to the nature of broccoli, its quality deteriorates quickly, and polypropylene open packaging is used to maintain freshness. Since the broccoli that has been opened has the same breathing as it does in the air after being packaged, it consumes nutrients quickly and evaporates water, and has a very short shelf life.

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. As for broccoli, it has been considered to use such a film for packaging, but in the case of packaging close to these open, the amount of oxygen in the air becomes equal, and broccoli has a large amount of oxygen. Has a problem that the broccoli becomes more active, nutrients such as vitamins are consumed as the broccoli grows further, the taste is deteriorated, and moreover, it easily witheres due to evaporation of water. Therefore, a packaging material and a packaging method that retain the original taste of broccoli 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 form a desired oxygen concentration atmosphere for keeping the freshness of broccoli for a long time, to supply a product which does not produce an offensive odor, has a reduced nutrient content, and has no wilting. The result of intensive research is to suppress the loss of nutrients and yellowing, which are disorders of high oxygen content, by supplying the minimum amount of oxygen necessary for broccoli survival and keeping the broccoli in a hibernating state. hand,
The point is to provide a packaging bag for broccoli and a package containing broccoli for supplying fresh broccoli.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to a broccoli-containing package comprising a perforated synthetic resin film in which broccoli is sealed, wherein the perforated synthetic resin film has an open area ratio of 1 × 10 ⁻⁵ to 1 × 10. ^-4 %, and a broccoli-containing package characterized in that the surface area in the bag per 100 g of broccoli is 100 to 700 cm ² .
In particular, the average pore diameter of the pores is 20μ to 150μ,
Further, it is preferable that 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 broccoli, but in general, unstretched polypropylene, stretched polypropylene, polyethylene, poly Vinyl chloride, etc. are used, but films other than these, such as polyamide, polyester, and polycarbonate films, and may also be composite films of these, and even those having a sealant layer on the surface of these films, There is no problem even if the film has been subjected to anti-fog treatment. The thickness of these films is usually 20-40 μm. 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 opening area ratio is determined by the amount of broccoli to be packed, and the opening area ratio is 1 × 10 ⁻⁵ to 1 × 10 ^−4.
Must be%. 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 spinach. 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
It becomes x 10 ^-4 %. When the open area ratio is 1 × 10 ⁻⁵ % or less, the broccoli becomes anoxic during the distribution process due to the breathing action after packaging, and begins to anaerobically breathe, producing an offensive odor. Further, when the open area ratio is 1 × 10 ⁻⁴ % or more, the amount of oxygen in the packaging bag becomes too large, which causes the yellowing phenomenon of broccoli and finally the rot, and further Since the amount of oxygen is large, the respiratory action of broccoli is activated, and there is a problem that broccoli grows more than necessary and nutrients are exhausted. Therefore, the aperture area ratio of the perforated film used as a broccoli packaging bag must be 1 × 10 ⁻⁵ to 1 × 10 ⁻⁴ %, and preferably 2 × 10 ^{−5 to} 7 × 10.
^-5 %, and particularly preferably 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 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.

Further, the number of holes per bag of the perforated film used for the broccoli 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. Also, as a broccoli packaging bag,
It does not matter even if the bag is in the form of a three-sided sealed bag, a four-sided sealed bag, a gusset bag, or the like, and further, a tray, a cup, or the like is filled with broccoli, which is then packed in a packaging bag. Good.

The size of the packaging bag for broccoli is such that the surface area inside the bag is 100 to 700 cm ² per 100 g of broccoli.
And preferably 200 to 600 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. 100c of bag surface area per 100g of broccoli
When it is m2 or less, the density of broccoli in the bag becomes high, scratches are caused by contact between broccoli and browning is likely to occur, and oxygen is insufficient at the above-mentioned opening area ratio, resulting in anaerobic breathing, which is not preferable. Furthermore, broccoli 100
When the surface area in the bag per g is 700 cm ² or more, the density of broccoli in the bag becomes low, the initial oxygen amount in the bag is large, and the oxygen supply amount is large at the above-mentioned open area ratio, and the breathing action of broccoli is increased. It becomes active and becomes yellow easily,
Broccoli nutrients will be exhausted. In addition, since the amount of film used is large, the cost of the bag is high.

Although it is not limited to the packaging of broccoli, naturally the distribution process and temperature control at the store are important points for keeping the freshness of vegetables and the like, and the respiration rate of broccoli is naturally also these. The present invention envisages these temperatures to be 3 to 20 ° C., although the breathing volume increases depending on the temperatures and the higher these temperatures are.

[0012]

【Example】

<< Example 1 >> Thickness 2 with internal dimensions of 200 mm x 200 mm
20 bags of broccoli were placed in a three-sided sealed bag in which a packing bag made of ⁵ μm drawn polypropylene and 15 holes with an average hole diameter of 80 μm were opened so that the open area ratio was 9.4 × 10 ⁻⁵ %.
Filled with 0 g (surface area in the bag is 200 × 200 × 2 = 800
Since it is 00 mm ² , the surface area of the bag per 100 g of broccoli is 40000 mm ² or 400 cm ^2. Shown in 1.

Example 2 A packaging bag having the same size as in Example 1, using a polypropylene having a thickness of 25 μ, and having 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 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, using a polypropylene having a thickness of 25 μm, and having an average pore diameter of 6 so that the open area ratio is 2.8 × 10 ⁻⁵ %.
Using a packaging bag having eight 0 μ holes, 200 g of the same broccoli 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 200 mm × 200 m
The same broccoli as used in Example 1 was placed in a non-perforated packaging bag made of unstretched polypropylene having a thickness of 25 μm and a thickness of 2 μm.
Table 1 shows the results of examining the freshness after 3 and 7 days of filling with 00 g in the same manner as in Example 1.

Comparative Example 2 A packaging bag having the same size as that of Example 1, using stretched polypropylene having a thickness of 25 μ,
Using a packaging bag in which three holes having an average pore diameter of 40 μ were opened so that the open area ratio was 4.7 × 10 ⁻⁶ %, 200 g of the same broccoli as used in Example 1 was filled, and Similarly, the results of examining freshness after 3 days and 7 days are shown in Table 1.

Comparative Example 3 A packing bag having the same size as that of Example 1, which is made of 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 in which 18 holes of 00μ were opened, 200 g of the same broccoli used in Example 1 was filled, and Example 1 was used.
Table 1 shows the results of examining freshness after 3 days and 7 days as in the above.

[0018]

[Table 1]

[0019]

By using the packaging bag of the present invention, the odor generated due to the anaerobic respiration of broccoli can be prevented and the digestion of nutrients due to the anaerobic respiration can be prevented, while
It prevents yellowing and spoilage due to excess oxygen and can be preserved for a long time while keeping the freshness of broccoli.

Claims (5)

[Claims] 1. A broccoli-containing package comprising a perforated synthetic resin film in which broccoli is sealed, wherein the perforated synthetic resin film has an open area ratio of 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 broccoli-containing package according to claim 1, wherein the holes of the perforated synthetic resin film have an average hole diameter of 20 to 150 μm. 3. The broccoli-containing package according to claim 1, wherein the number of the holes provided in one package is plural. 4. The opening area ratio is 2 × 10 ^{−5 to} 5 × 1.
The package containing broccoli according to claim 1, 2 or 3, which is 0 ^-5 %. 5. The broccoli-containing package according to claim 1, wherein the surface area of the bag per 100 g of broccoli is 200 to 600 cm ² .