JP2601588B2 - Sprout 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 keeping freshness by keeping sprouts breathing under an appropriate oxygen atmosphere even after sprouts are packaged in a packaging bag of synthetic resin film. 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 respiratory action of sprouts, and that maintains conditions that suppress deterioration of quality due to oxidation by oxygen. It is.

[0002]

2. Description of the Related Art Sprouts maintain their respiratory action even after being harvested. Therefore, it is necessary to prevent sprouts from deteriorating during storage and distribution after harvest and until eating.
In addition, as a form of sprouts, intensive cultivation by factories,
Distribution to consumer areas, sales at supermarkets, etc. are taking the same distribution form as industrial products, and various distribution channels are taken from production to sales. For this reason, pack packaging is used to protect sprouts (products). It is becoming necessary. Under these circumstances, sprouts currently on the market are simply distributed and sold in packaging bags made of unstretched polypropylene or the like. Most of these packaging bags used for sprouts are non-porous and sealed. For this reason, after the sprouts are packaged,
The sprouts in the sprouts are digested by the anaerobic respiration and exposed to an anaerobic atmosphere, and the bag must be opened to produce alcohol and aldehydes. Most of them had a bad smell.

[0003] Further, regarding plant materials such as general vegetables,
As a method of 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. For sprouts, packaging using such a film has been considered.However, in these open packages, the amount of oxygen in the air is equivalent to the amount of oxygen in the air. However, the problem that the wound received by the sprouts browns, the respiratory action of the sprouts becomes active due to the large amount of oxygen, the sprouts grow further and the leaves become green, and furthermore, the moisture There is a problem that it is easily withered due to evaporation. Therefore, a packaging material and a packaging method that leave the original flavor of the bean sprouts 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 desirable oxygen concentration atmosphere for maintaining the freshness of sprouts for a long time, and to supply goods which do not generate off-flavors, do not brown, and do not wilter. It is the result of intensive research, supplying the minimum amount of oxygen necessary for the survival of sprouts and keeping the sprouts in a hibernating state, so that browning and greening, which are obstacles to high oxygen content, are suppressed and freshness is reduced. An object of the present invention is to provide a sprouts packaging bag and a sprouts-containing package for supplying high sprouts.

[0005]

According to the present invention, there is provided a sprouts-containing package made of a perforated synthetic resin film having a sealed bean sprouts, wherein the perforated synthetic resin film has an open area ratio of 3 × 1.
0 ^-6 a to 1 × 10 ^-4%, a bean sprouts containing packaging material, characterized in that the bag surface area moth 200-600 ² per sprouts 100 g, in particular, an average pore diameter of the pores 20μ~150μ It is preferable that the number of the holes is plural per packaging bag.

The perforated film used in the present invention may be any film as long as it can be used for sprouts packaging. 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 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 sprouts to be packaged, and the open area ratio needs to be 3 × 10 ⁻⁶ to 1 × 10 ⁻⁴ %. 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 the sprouts. 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 3 × 10 ^-6 to 1 × 10 ^-4 %.
Becomes If the open area ratio is 3 × 10 ⁻⁶ % or less, the sprouts become anoxic during the distribution process due to the respiratory action after packaging and start anaerobic respiration, generating an unpleasant odor. On the other hand, if the opening area ratio is 1 × 10 ⁻⁴ % or more, the amount of oxygen in the packaging bag becomes too large, and under the influence of this oxygen, the wound received during the manufacturing process, the packaging process, or the distribution process of the sprouts. However, the oxygen causes a browning phenomenon, and furthermore, since the amount of oxygen is large, the respiration of the sprouts is activated, and there is a problem that the sprouts grow more than necessary and the leaves are greened. Therefore, the opening area ratio of the perforated film used as a packaging bag for sprouts is 3 × 10 ^-6 to 1 × 10 ^6.
-4 %, preferably 4 × 10 ^-6
8 × 10 ^-5 %, particularly preferably 6 × 10 ^{-6 to} 5 × 10
It is more effective to be in the range of ^-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 sprouts 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. The sprouts packaging bag may be a three-sided seal bag, a four-sided seal bag, a gusset bag, or any other form.Furthermore, trays, cups, and the like are filled with sprouts, and the sprouts are packed in a packaging bag. It may be in the form of packaging.

[0010] The size of the packaging bag for sprouts is 100 g of sprouts.
The inner surface area per bag needs to be 200 to 600 cm ² , preferably 300 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. Sprouts 10
When the bag surface area per 0g is a 300 cm ² or less, the density of the bean sprouts in the bag is increased, scratched by contact with sprouts each other browned easily become oxygen deficient in opening area ratio of the anaerobic It is not preferable because it falls into breathing. Furthermore,
When the surface area in the bag per 600 g of sprouts becomes 600 cm ² or more, the density of the sprouts in the bag becomes low, the initial oxygen amount in the bag is large, and the oxygen supply amount is large in the opening area ratio, and the respiration of sprouts. Becomes active and easily browns,
The sprouts leaves grow and tend to yellow or green, and the cost of the bag increases due to the large amount of film used.

Although not limited to bean sprouts packaging, of course, in maintaining the freshness of vegetables and the like, the distribution process and temperature control in stores are important points, and the respiration of sprouts is of course important. It depends on temperature, and as these temperatures increase, their respiration increases,
The present invention assumes that these temperatures are 5 to 15 ° C.

[0012]

EXAMPLES "Example 1" inside dimension of 200 mm × 240 mm, the packaging bag consisting of oriented polypropylene having a thickness of 35micro, open pore area ratio 1.0
A three-side sealed bag having 20 holes with an average hole diameter of 80 μm so as to be × 10 ⁻⁴ % is filled with 250 g of sprouts that have been washed and drained (the inner surface area of the bag is 200 × 240 × 2 = 9).
(Because it is 6000 mm ² , the surface area in the bag per 100 g of sprouts is 38,400 mm ^2, that is, 384 cm ² ). Are shown in Table 1.

[0013] "Example 2" a packaging bag of a similar size as in Example 1, using oriented polypropylene of 35μ thickness, aperture area ratio 7.0 × 10
The same sprouts as used in Example 1 were used in a packaging bag having 95 holes having an average pore diameter of 30 μm so as to obtain ^-5 %.
g, and freshness was examined after 3 days and 5 days in the same manner as in Example 1. The results are shown in Table 1.

[0014] "Example 3" a packaging bag of a similar size as in Example 1, using oriented polypropylene of 35μ thickness, aperture area ratio 2.0 × 10
The same sprouts as used in Example 1 were used in a packaging bag having 10 holes each having an average pore diameter of 50 μm so as to obtain ^-5 %.
g, and freshness was examined after 3 days and 5 days in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 1 A non-perforated packaging bag made of unstretched polypropylene having an inner size of 200 mm × 240 mm and a thickness of 20 μm was filled with 250 g of the same sprouts as used in Example 1, Table 1 similarly shows the results of examining the freshness after 3 days and 5 days.

[0016] "Comparative Example 2" a packaging bag of a similar size as in Example 1, using a thickness oriented polypropylene of 35micro, aperture area ratio 2.2 × 1
Using a packaging bag in which three holes having an average pore diameter of 30 μm were formed so as to be 0 ^-6 %, the same sprouts as used in Example 1 were used for 250.
g, and freshness was examined after 3 days and 5 days in the same manner as in Example 1. The results are shown in Table 1.

[0017] "Comparative Example 3" a packaging bag of a similar size as in Example 1, using a cast polypropylene of 35μ thickness, aperture area ratio 7.4 × 1
Using a packaging bag having 90 holes with an average pore diameter of 100 μm so as to be 0 ^-4 %, the same sprouts as used in Example 1 were used.
Table 1 shows the results of examining the freshness after 3 days and 5 days, as in Example 1, after filling 50 g.

[0018]

[Table 1]

[0019]

By using the packaging bag of the present invention, the odor generated by anaerobic respiration of bean sprouts is prevented, and the digestion of sugar by anaerobic respiration is prevented, while browning and greening due to excessive oxygen are prevented. It can be stored for a long time while keeping the sprouts fresh.

Claims (5)

(57) [Claims] 1. In a sprouts-containing package made of a perforated synthetic resin film in which a sprouts is sealed, the open area ratio of the perforated synthetic resin film is 3 × 10 ^-6 to 1 × 10 ^-4 %, and 100 g of sprouts. The surface area per bag is 200-60
A sprouts-containing package having a size of 0 cm ² . 2. The sprouts-containing package 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 sprouts-containing package according to claim 1, wherein the number of the holes in one package is plural. 4. An open area ratio of 4 × 10 ⁻⁶ to 8 × 1.
0 ^-5% claim 1, 2 or 3 sprouts containing packaging body according. 5. The bag has a surface area of 3 per 100 g of sprouts.
00～500Cm ² a is claim 1, 2, 3 or 4 sprouts containing packaging body according.