JPH06125702A - Sliced welsh onion-containing package - Google Patents

Abstract

PURPOSE:To provide a sliced welsh onion-containing package whose packaging material consists of a specifically pored synthetic resin film, capable of preventing odor due to anaerobic breathing or preventing the contents from browning due to excess oxygen for a long period of time, thus excellent in freshness preservativeness and the preservability of the contents. CONSTITUTION:The package whose packaging material consists of a pored synthetic resin film and has the following pare characteristics: (1) open pore area rate: 1X10<-5> to 1X10<-4>%; (2) the in-bag surface area per 100g of sliced Welsh onion: 200-3500cm<2>; and (3) mean pore diameter: pref. 20-150mum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to maintain freshness by allowing a sliced leek to continue breathing under an appropriate oxygen atmosphere even after the sliced leek has been packed in a synthetic resin film packaging bag. It relates to a package. More specifically, the present invention relates to a package which holds an oxygen atmosphere that does not cause anaerobic respiration in a low oxygen state due to the respiratory action of sliced leek, and also holds conditions that suppress deterioration of quality due to oxidation by oxygen. It is a thing.

[0002]

BACKGROUND OF THE INVENTION Sliced leeks maintain their respiratory action after processing. Moreover, breathing becomes higher than before cutting. Therefore, it is necessary to prevent the quality deterioration of sliced leek during storage / distribution after processing and before eating. The sliced leek is produced at the Kat Yasai plant, which is well-managed. Due to the nature of sliced leek, the quality of the sliced leek deteriorates quickly, and polyethylene-based hermetically sealed packaging is used to maintain freshness. The sealed sliced leek immediately consumes the air in the bag after it is packaged, becomes anoxic, and anaerobically breathes, so it consumes nutrients quickly, evaporates moisture, and has a very short shelf life. Has become.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a product which forms a desirable oxygen concentration atmosphere for keeping the freshness of sliced leek for a long time, does not give off an offensive odor, and has no nutrient loss or wilting. Therefore, it was done as a result of diligent research, and by supplying the minimum amount of oxygen necessary for the survival of sliced leek and keeping the sliced leek in a hibernating state, the decrease in sugar content and browning which are disorders of high oxygen content Hold down
The point is to provide a packaging bag for sliced leek and a packaged body containing sliced leek for supplying sliced leek with high freshness.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, in a package containing sliced leek, which is made of a synthetic resin film with perforated slices hermetically sealed, 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 sliced leek is 300 to 3500 cm ^2.
It is preferable that the average particle diameter of the holes is 20 μm to 150 μm, and 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 sliced leeks, but in general, unstretched polypropylene, stretched polypropylene, polyethylene, Polyvinyl chloride, etc. are used, but other films such as polyamide, polyester, polycarbonate, etc., and composite films thereof may be used, and further, those having a sealant layer on the surface of these films may be used. 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 open area ratio is determined by the amount of sliced leek to be packed, and the open 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 sliced leek. From the experimental results of the present inventors, the oxygen concentration is 3% or more and 18% or less. Is preferable, and the aperture area ratio for satisfying these conditions is 1 × 10 ⁻⁵ or more.
It becomes 1 × 10 ^-4 %. When the open area ratio is 1 × 10 ⁻⁵ % or less, the sliced leek becomes anoxic during the distribution process due to the breathing action after packaging, and begins to anaerobically breathe, producing an offensive odor. Further, if the open area ratio is 1 × 10 ⁻⁴ % or more, the amount of oxygen in the packaging bag becomes too large, and the influence of this oxygen causes the soft-rotation phenomenon of sliced leek,
Furthermore, since the amount of oxygen is large, the respiratory action of the sliced leek is activated, and the sliced leek grows more than necessary and the nutrients are consumed. Therefore, the aperture area ratio of the perforated film used as a packaging bag for sliced leek needs to be 1 × 10 ⁻⁵ to 1 × 10 ⁻⁴ %, and preferably 2 × 10 ⁻⁵ to 8 × 10. It is more effective to be in the range of ^-5 %.

Further, 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 sliced leek 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 two holes per bag. It is desirable that the degree of influence per hole is 10% or less. The sliced leek packaging bag may be a bag in the form of a three-sided sealed bag, a four-sided sealed bag, or a gusset bag.Furthermore, the sliced leek is filled in a tray, a cup, or the like, which is then packaged. It may be in the form of packaging in a bag.

The size of the packaging bag for sliced leek has a surface area of 200-3500 cm per 100 g of sliced leek.
Must be ² , preferably 300-3000 cm
^{Is 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. 200 bag surface area per 100g sliced leek
When it is cm ² or less, the density of the sliced leek in the bag becomes high, scratches are caused by contact between the sliced leek and browning is likely to occur, and oxygen deficiency occurs in the above open pore area ratio, resulting in anaerobic respiration. Absent. Furthermore, sliced leek 10
When the surface area in the bag is 3500 cm ² or more per 0 g,
The density of sliced leek in the bag is low, the initial amount of oxygen in the bag is also large, the oxygen supply amount is also large at the above-mentioned opening area ratio, the respiratory action of sliced leek becomes active, and browning easily occurs, sliced leek The nutrients of 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 sliced leek, naturally, the distribution process and temperature control at the store are important points for keeping the freshness of vegetables and the like, and naturally the respiration rate of sliced leek is also important. The present invention envisages these temperatures to be 3 to 15 ° C., although depending on these temperatures, the respiratory volume increases as these temperatures increase.

[0011]

【Example】

<< Example 1 >> 50 mm × 100 mm in thickness with a thickness of 50
A packing bag made of nylon / polyethylene (NY / PE) of μ, and a three-sided sealed bag in which seven holes with an average hole diameter of 40 μ were opened so that the open area ratio was 8.9 × 10 ⁻⁵ %. 5g (the surface area inside the bag is 50 × 100 × 2)
= 10000mm ² , so 100g sliced leek
The surface area inside the bag is 200,000 mm ² or 20
00cm is ^2), and stored at 10 ° C., indicating the freshness of the 3 days and 7 days after the odor conditions, the result of observation of the browning conditions in Table 1.

Example 2 A packaging bag having the same size as in Example 1 and having a thickness of 50 μm and made of nylon / polyethylene (N
Y / PE) packaging bag with an open area ratio of 1.3 x
In the same manner as in Example 1, 5 g of the sliced leek was placed in a three-sided sealed bag in which four holes having an average pore size of 20 μ were made so as to be 10 ⁻⁵ %.
Table 1 shows the results obtained by filling and storing at 10 ° C., and observing the freshness 3 and 7 days afterward for odor generation and browning.

<Embodiment 3> A packaging bag having the same size as that of Embodiment 1, which is nylon / polyethylene (N
Y / PE) packaging bag with an open area ratio of 6.3 x
In the same manner as in Example 1, 5 g of sliced leek was placed in a three-sided sealed bag in which five holes having an average pore size of 40 μ were opened so as to be 10 ⁻⁵ %.
Table 1 shows the results obtained by filling and storing at 10 ° C., and observing the freshness 3 and 7 days afterward for odor generation and browning.

<< Comparative Example 1 >> Inner size is 50 mm × 100 mm
50μ thick nylon / polyethylene (NY / P
Table 1 shows the results of observing the freshness 3 days and 7 days after the storage of the same sliced leek at 10 ° C in the non-porous packaging bag made of E) and the odor generation state and browning state.

Comparative Example 2 A packaging bag having the same size as in Example 1 and having a thickness of 50 μm, nylon / polyethylene (N
Y / PE) packaging bag with an open area ratio of 6.3 x
In the same manner as in Example 1, 5 g of the sliced leek was placed in a three-sided sealed bag in which two holes having an average pore diameter of 20 μ were opened so as to be 10 ⁻⁶ %.
Table 1 shows the results obtained by filling and storing at 10 ° C., and observing the freshness 3 and 7 days afterward for odor generation and browning.

Comparative Example 3 A packaging bag having the same size as in Example 1 and having a thickness of 50 μm, nylon / polyethylene (N
Y / PE) packaging bag with an open area ratio of 2.8 x
In the same manner as in Example 1, 5 pieces of sliced leek were placed in a three-sided seal bag in which 10 holes having an average hole diameter of 60 μ were made so as to be 10 ⁻⁴ %.
Table 1 shows the results of observing the freshness 3 days and 7 days after the filling with g and odor generation and browning.

[0017]

[Table 1]

[0018]

EFFECT OF THE INVENTION By using the packaging bag of the present invention, the odor generated due to the anaerobic respiration of sliced leek can be prevented and the digestion of nutrients by the anaerobic respiration can be prevented, while
It prevents browning caused by excess oxygen and can preserve the freshness of sliced leeks for a long time.

Claims (5)

[Claims] 1. A packaged product containing a sliced leek, which is made of a synthetic resin film having a sliced leek and hermetically sealed therein, wherein the area ratio of the apertured synthetic resin film is 1 × 10 ⁻⁵ to 1 × 1.
0 and ^-4%, slice leek containing packaging material, wherein the bag surface area per slice leek 100g is 200~3500cm ^2. 2. The sliced leek-containing package according to claim 1, wherein the perforated synthetic resin film has an average pore diameter of 20 to 150 μm. 3. The package with sliced leek 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 8 × 1.
0 ^-5% claim 1, 2 or 3 slices leek containing packaging body according. 5. The package containing sliced leek according to claim 1, 2, 3 or 4, wherein the surface area in the bag per 100 g of sliced leek is 300 to 3000 cm ² .