JPH10243767A - Wrapped product of citrus sudachi and its preservation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provided a wrapped Citrus sudachi for retaining the freshness of the Citrus sudachi, capable of preventing the generation of ethanol and acetaldehyde causing the yellowing, putrefaction and foreign smell of the Citrus sudachi. SOLUTION: This wrapped Citrus sudachi is obtained by hermetically wrapping the Citrus sudachi with a wrapping material having an oxygen permeability of 3.8-27cc/24h.atm and a carbon dioxide permeability of 3.8-27cc/24h.atm in a temperature condition of 10-35 deg.C per g of the Citrus sudachi and further having a steam permeability of 49gr/24h.m<2> or less (JIS Z 0208, 40 deg.C, 90% RH, 0.1mm).

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 sudachi and a method for storing the package.

[0002]

2. Description of the Related Art Sudachi has been around for anniversary, but its heyday is 9
-October. March to July are house items, August to October are open-air objects, and 11 to February are preserved items. Conventionally, 2 kg of Sudachi are handkerchief-wrapped or individually wrapped in vinyl bags, packed in cardboard boxes, distributed from the production area to markets and retail stores,
It is sold at retail stores without packaging or in individual wrapped pieces with wrap film. No special measures have been taken to preserve the freshness of Sudachi during distribution. For this reason, yellowing and decay occur at the time of arrival at the market or the retail store, which causes complaints. Also, in retail stores, yellowing rapidly progresses, and shelf holding is poor, which is a problem. In particular, during summer when the temperature is high, the temperature of the product is not sufficiently lowered even when the product is distributed by using a refrigerator, so that the problem occurs remarkably. Another problem with Sudachi is that if a sudden change in temperature is applied from room temperature to low temperature, low-temperature damage (discoloration, decay) occurs, and it is difficult to prevent yellowing and decay only by controlling the temperature.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent the yellowing and spoilage of sudachi which occur at high temperatures, and to prevent substances that have a bad influence on fruits and vegetables such as ethanol and acetaldehyde by atelectasis. An object of the present invention is to provide a package for keeping freshness of Sudachi which does not generate, and a method for preserving Sudachi.

[0004]

Means for Solving the Problems Of particular concern in the quality control of post-harvest Sudachi are yellowing and spoilage. Yellowing of Sudachi is caused by ripening and can be suppressed by slowing the ripening rate. The cause of rot occurring in the calyx portion and the wound is an oxidative reaction with surrounding oxygen, and the occurrence can be delayed by setting it in a low oxygen state.

[0005] The package of the present invention is made of a synthetic resin film having gas permeability such that the inside of the package has an appropriate gas composition when the Sudachi is sealed and packaged, or a laminate of a synthetic resin film and paper, a nonwoven fabric, or the like. The so-called MA (Modifi), which suppresses the respiration of Sudachi and maintains freshness by making the gas concentration in the bag low oxygen and high carbon dioxide using the carbon dioxide discharged by the respiration of Sudachi
This is a package characterized by using bags and containers having an ed Atmosphere effect. That is, the present invention, 10 ~ 35 ℃
Under the above temperature conditions, the oxygen permeation amount per 1 gr of Sudachi is 3.6 ~
35cc / 24h · atm, carbon dioxide permeation amount 3.6-39.4
cc / 24h · atm and water vapor transmission rate is 40gr / 24h · m ²
(JIS Z 0208, 40 ° C, 90% RH, 0.1mm) A Sudachi package characterized by being sealed and packaged with a plastic film having the following characteristics: 10 to 35 ° C
When the sudachi is wrapped under the following temperature conditions, the oxygen concentration in the packaging material is 2.0 to 18.5%, and the carbon dioxide concentration is 1.5 to 18%.
%, Which is a package of Sudachi. In addition, per 1 gr of Sudachi, the amount of oxygen permeation is 3.6-35cc / 24h
・ Atm, carbon dioxide permeation amount 3.6 ～ 39.4cc / 24h ・ at
m and a water vapor transmission rate of 40 gr / 24 h · m ² (JIS Z 020
(8, 40 ° C, 90% RH, 0.1mm) Sealed and packaged Sudachi with a plastic film having the following characteristics and stored at 10 to 35 ° C. A method for preserving Sudachi, characterized in that it is maintained at 0.5 to 18%.

[0006] If it is distributed and stored at a low temperature of about 10 ° C, a smaller amount of oxygen and carbon dioxide permeation than the package of the present invention is sufficient, but it is necessary to maintain freshness particularly to prevent yellowing and decay. It is only after the temperature has risen to 15 ° C or more. Considering the actual use conditions at this time, when transporting at room temperature, of course, it is necessary to store it in a refrigerator compartment and transport it in an insulated car or refrigerated car. Even in such a case, in the current situation in Japan, it is easily considered that the cold chain is broken and exposed to high temperatures. In such a case, the oxygen permeation amount per gr of Sudachi is less than 3.6 cc / 24h · atm,
If Sudachi is hermetically sealed in a package having a carbon dioxide permeation amount of less than 3.6 cc / 24 h · atm, the inside of the package is deficient in oxygen (less than 2.0%) and excess carbon dioxide (more than 18%).
, Causing physiological disorders in Sudachi and producing alcohol and acetaldehyde. Conversely, if the oxygen permeation amount per 1 gr of Sudachi exceeds 35 cc / 24 h · atm, the oxygen concentration in the package exceeds 18.5% and the respiration of Sudachi cannot be suppressed, so that the MA effect cannot be obtained. For this reason, the Sudachi package has an oxygen permeation amount of 1 gr so that the oxygen concentration in the package is 2.0 to 18.5% and the carbon dioxide concentration is 1.5 to 18% under the temperature condition of 10 to 35 ° C. It must be adjusted to 3.6 to 35 cc / 24 h · atm per unit, and the carbon dioxide permeation amount to 3.6 to 39.4 cc / 24 h · atm. In order to use the package of the present invention more effectively, it is necessary to understand how long the package is exposed to and how long, and in accordance with that, the oxygen permeation amount of the package within the above range, It is desirable to set the carbon dioxide permeation amount.

[0007] In the current domestic distribution, a solid cold chain is not established as in the United States. Therefore, even if a refrigerated vehicle is used, the temperature of goods rises when loading / unloading luggage, or a retail store from a vehicle may be used. In many cases, the product is left at room temperature for a while while being placed in a refrigerator, and the temperature of the product often rises. For this reason, the amount of oxygen and carbon dioxide permeated through the package should be set in accordance with the worst conditions during distribution to prevent the deterioration of Sudachi due to atelectasis. It is desirable to change the amount of gas permeation of the body depending on the season, but in many cases it is not possible to cope with this in the field. In this case, it is necessary to design the package assuming the summer, which is the worst condition.

The package used in the present invention has a water vapor transmission rate of 40 gr / 24 h · m ² (JIS Z 0208, 40 ° C., 90% RH, 0.1%) in order to prevent yellowing due to ripening of Sudachi. mm)
The following synthetic resin film, preferably 35gr / 24h · m
It is desirable to use a synthetic resin film of ² (JIS Z 0208, 40 ° C, 90% RH, 0.1 mm) or less. Even when the micropores are provided in the package of the present invention, the amount of water that escapes from each micropore having a diameter of 100 μm or less is extremely small, and the water vapor transmission rate of the package is determined by the water vapor transmission rate of the film.

As the material of the package used in the present invention, any material can be used as long as it can be used for the packaging of fruits and vegetables, but in general, unstretched polypropylene, stretched polypropylene, polyethylene, Polyvinyl chloride or the like is used, but other films such as polyamide, polyester, and polycarbonate may be used, and further, a composite film of these may be used. A fogged film can be used. The thickness of these films is usually 20 to
Those having a size of 60 μm are used. Further, these films may be transparent, or may have a printed surface. By forming micropores having an average pore diameter of 5 to 150 μm in the film, the package can be adjusted to a gas permeation amount necessary for storing Sudachi. Regarding the micropores, if the average pore diameter is less than 5 μm, it is difficult to process, and if the average pore diameter exceeds 150 μm, the number of pores per pack decreases. Average pore size 5-150μ
m is preferable, and 10 to 100 μm is more preferable.

Depending on the shape and weight of the package, the amount of oxygen and carbon dioxide permeated by the material used may be sufficient (for example, by enlarging the bag). If a plastic film generally used is used, it is necessary to provide micropores in the package in order to satisfy the oxygen and carbon dioxide permeation amount of the present invention or the gas composition in the package. In this case, the permeation amount of oxygen and carbon dioxide in the package is determined by both the gas permeation amount of the material itself and the gas permeation amount determined by the size and number of the micropores. Some materials have selective permeability, so that the permeation amount of oxygen and carbon dioxide is not 1: 1 and this point also needs to be considered. The permselectivity refers to the difference in the amount of permeation of oxygen and carbon dioxide depending on the material, for example, a 25 μm-thick stretched polypropylene (OP
In P), the oxygen permeation amount is 2500 cc / m ² · 24 h · atm, whereas the carbon dioxide permeation amount is 8500 cc / m ² · 24 h · atm. However, polyethylene terephthalate (PET)
When using a material with high gas barrier properties like
The gas permeability of the package is determined by the pores.

The package used in the present invention needs to be sealed in order to obtain the MA effect, but when using a bag, the method may be any method such as heat sealing, tying band, rubber band, caulking, etc. . The form of packaging is not limited to bags, and for example, a tray container with a top seal may be used. The purpose of use is not limited to retail packaging, but it can also be used as a distribution MA cardboard box in which a large bag provided with gas permeability is integrated with a cardboard box.

[0012]

【Example】

<< Example 1 >> Size, length 180 mm, width 130 mm, oxygen permeation amount of 3.8 to 4.3 cc / 24 h · atm · gr, carbon dioxide permeation amount of 3.8 to 4.3 cc / 24 h · atm · gr Micropores (average pore diameter: 60 μm, 7 to 8 holes) were formed so that the water vapor permeability was 1.3 gr / 24 h · m ² (JIS Z 0208, 40 ° C., 90%
RH, 0.1 mm) in a bag made of antifogging stretched polypropylene (antifogging OPP) having a thickness of 25 μm, and about 20 Sudachi (6 pieces)
0g and sealed, storage temperature is 30 assuming actual distribution
It stored at 14 degreeC for 48 days. Table 1 shows the results of the quality evaluation of Sudachi at that time. Evaluation number n = 10
Hereafter, evaluation was performed using the same number.

<< Example 2 >> The oxygen permeation amount of the bag is 4.7 to
5.7cc / 24h • atm • gr, CO2 permeation amount 4.7 ~
5.7cc / 24h ・ atm ・ gr Fine pores (average pore diameter 6
Sudachi was stored for 14 days in the same manner as in Example 1 except that the opening was 0 μm (9 to 11 pieces). Table 1 shows the results of the quality evaluation of Sudachi at that time. << Embodiment 3 >> The oxygen permeation amount of the bag is 18 to 20 cc / 24h · atm.
・ Gr, carbon dioxide permeation amount is 18-20cc / 24h ・ atm ・ gr
Sudachi was stored for 14 days in the same manner as in Example 1 except that micropores (average pore diameter: 60 μm, 7 to 8 pores) were opened, and 40 gr of Sudachi (two) were packed and sealed. Table 1 shows the results of the quality evaluation of Sudachi at that time. << Example 4 >> The oxygen permeation amount of the bag is 23 to 27 cc / 24 h · atm.
・ Practical except that micropores (average pore diameter 60μm, 9-11 pieces) are opened so that the gr and carbon dioxide permeation amount become 23-27cc / 24h ・ atm ・ gr, and 40gr of Sudachi (2 pieces) is packed and sealed. Sudachi was stored for 14 days as in Example 1. Table 1 shows the results of the quality evaluation of Sudachi at that time.

Example 5 Sudachi was stored for 14 days in the same manner as in Example 1 except that the storage temperature was 20 ° C. Table 1 shows the results of the quality evaluation of Sudachi at that time. Example 6 Sudachi was stored for 14 days in the same manner as in Example 2 except that the storage temperature was 20 ° C. Table 1 shows the results of the quality evaluation of Sudachi at that time. Example 7 Sudachi was stored for 14 days in the same manner as in Example 3 except that the storage temperature was 20 ° C. Table 1 shows the results of the quality evaluation of Sudachi at that time. Example 8 Sudachi was stored for 14 days in the same manner as in Example 4 except that the storage temperature was 20 ° C. Table 1 shows the results of the quality evaluation of Sudachi at that time.

Example 9 Sudachi was stored for 14 days in the same manner as in Example 1 except that the storage temperature was 25 ° C. Table 1 shows the results of the quality evaluation of Sudachi at that time. << Example 10 >> Example 2 except that the storage temperature was 25 ° C.
Sudachi was stored for 14 days as in. Table 1 shows the results of the quality evaluation of Sudachi at that time. << Example 11 >> Example 3 except that the storage temperature was 25 ° C.
Sudachi was stored for 14 days as in. Table 1 shows the results of the quality evaluation of Sudachi at that time. << Example 12 >> Example 4 except that the storage temperature was 25 ° C.
Sudachi was stored for 14 days as in. Table 1 shows the results of the quality evaluation of Sudachi at that time.

[0016]

[Comparative example]

<< Comparative Example 1 >> 40 gr of Sudachi (two pieces) was wrapped in a wrap film which is currently used mainly for packaging Sudachi, and the Sudachi was stored under the same temperature conditions as in Example 1 for 14 days. Table 2 shows the results of the quality evaluation of Sudachi at that time. The number of evaluations was n = 10, and the same number was used for evaluation. << Comparative Example 2 >> Sudachi was stored for 14 days in the same manner as Comparative Example 1 except that the storage temperature was 20 ° C. Table 2 shows the results of the quality evaluation of Sudachi at that time. << Comparative Example 3 >> Sudachi was stored for 14 days in the same manner as in Comparative Example 1 except that the storage temperature was 25 ° C. Table 2 shows the results of the quality evaluation of Sudachi at that time.

<< Comparative Example 4 >> At present, 200 gr of Sudachi (6 pieces) is applied to a wrap film mainly used for packaging Sudachi.
And stored under the same temperature conditions as in Example 1 for 14 days. Table 2 shows the results of the quality evaluation of Sudachi at that time. The number of evaluations was n = 10, and the same number was used for evaluation. << Comparative Example 5 >> Sudachi was stored for 14 days in the same manner as in Comparative Example 4 except that the storage temperature was 20 ° C. Table 2 shows the results of the quality evaluation of Sudachi at that time. << Comparative Example 6 >> Sudachi was stored for 14 days in the same manner as in Comparative Example 4 except that the storage temperature was 25 ° C. Table 2 shows the results of the quality evaluation of Sudachi at that time.

<< Comparative Example 7 >> Example 1 without packaging Sudachi
Sudachi was stored under the same temperature conditions for 14 days. Table 2 shows the results of the quality evaluation of Sudachi at that time. Evaluation number n
= 10, and the same number was used for evaluation. << Comparative Example 8 >> Sudachi was stored for 14 days in the same manner as in Comparative Example 7 except that the storage temperature was 20 ° C. Table 2 shows the results of the quality evaluation of Sudachi at that time. << Comparative Example 9 >> Sudachi was stored for 14 days in the same manner as in Comparative Example 7 except that the storage temperature was 25 ° C. Table 2 shows the results of the quality evaluation of Sudachi at that time.

Table 1 Gas composition in bag (%) Yellowish Rot Mold Odor (Day 14) O ₂ CO ₂ Example 1 ○ ○ ○ ○ 13.5 6.7 Example 2 △ ○ ○ ○ 15.1 5.7 Example 3 ○ ○ ○ ○ 16.3 4.0 Example 4 ○ ○ ○ ○ 18.2 2.1 Example 5 ○ ○ ○ ○ 6.5 14.8 Example 6 ○ ○ ○ ○ 9.3 11.2 Example 7 ○ △ ○ ○ 14.0 5.6 Example 8 ○ ○ ○ ○ 17.8 2.5 Example 9 △ ○ ○ ○ 7.1 14.1 Example 10 ○ ○ ○ ○ 10.2 10.5 Example 11 ○ ○ ○ ○ 15.6 5.4 Example 12 ○ ○ ○ ○ 14.4 5.9

Table 2 Gas composition in bag (%) Yellowish Rot Mold Odor (Day 14) O ₂ CO ₂ Comparative Example 1 × △ ○ ○ 8.6 4.6 Comparative Example 2 × ○ △ ○ 15.3 2.3 Comparative Example 3 × △ × × 6.5 3.9 Comparative Example 4 × △ ○ ○ 8.3 1.2 Comparative Example 5 × ○ ○ ○ 4.6 5.3 Comparative Example 6 × △ △ ○ 2.6 3.5 Comparative Example 7 × △ ○ − − − Comparative Example 8 × △ ○ − − − Comparative Example 9 × × ○ − -- ○: All products have commercial value △: At least one product with limited commercial value is included ×: At least one product with no commercial value is included Gas composition in bag averages n = 10 value

Claims (3)

[Claims] 1. An oxygen permeation rate of 3.6 to 35 cc / 24 h.atm and a carbon dioxide permeation rate of 3.6 to 39.4 cc / 24 h.atm per 1 g of Sudachi under a temperature condition of 10 to 35.degree. Transmittance of 40gr / 24h ・ m ² (JIS Z 0208, 40 ℃, 90%
A package of Sudachi, wherein Sudachi is hermetically sealed with a plastic film having characteristics of 0.1 mm or less. 2. When packaging Sudachi under a temperature condition of 10 to 35 ° C., the oxygen concentration in the packaging material is 2.0 to 18.5% and the carbon dioxide concentration is 1.5 to 18%. Characteristic packaging of Sudachi. 3. An oxygen permeation amount of 3.6 g per Sudachi.
~ 35cc / 24h · atm, carbon dioxide permeation amount 3.6 ~ 39.
4cc / 24h · atm and water vapor transmission rate 40gr / 24h · m
² (JIS Z 0208, 40 ° C, 90% RH, 0.1mm)
Store at 0-35 ° C, and oxygen inside the package is 2.0-18.5.
%, Carbon dioxide 1.5 to 18%.