JP5321008B2 - Package for keeping freshness of chrysanthemum cut flowers and method for keeping freshness of chrysanthemum cut flowers - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a method for preserving chrysanthemum cut flowers when packaging chrysanthemum cut flowers and storing them at a temperature higher than 10 ° C. and lower than 30 ° C., and a packaging bag for keeping freshness of chrysanthemum cut flowers.

  Fruits and vegetables such as chrysanthemum flowers will last longer if their surrounding gas atmosphere has a moderately low oxygen concentration and high carbon dioxide concentration compared to the air, resulting in less breathing than in the air. . However, if the fruits and vegetables are placed under excessively low oxygen concentration and high carbon dioxide concentration conditions, they cause respiratory problems and are likely to deteriorate.

  Therefore, when packaging fruits and vegetables for storage, shipment, transportation, and store display, the fruits and vegetables must be stored under appropriate gas conditions.

  However, since the optimum gas conditions vary depending on the type of fruits and vegetables, fruits and vegetables other than chrysanthemum cut flowers are not always applicable to chrysanthemum cut flowers even under good storage conditions. In particular, when chrysanthemum cut flowers are packaged and stored in a packaging bag, problems such as flowering, wilting, and yellowing of the leaves are likely to occur during storage, and it is necessary to open chrysanthemum flowers after opening the packaging bag. Preservation conditions for fruits and vegetables other than cut chrysanthemum flowers cannot be applied as they are.

Chrysanthemum is widely used for ceremonial occasions and the like, and its demand is around the year including the high temperature period. Because of the lack of refrigeration equipment, cheap chrysanthemums are often distributed and sold at room temperature, and problems such as yellowing of leaves, wilting, and excessive flowering tend to occur.
In addition, the demand for chrysanthemum cut flowers is concentrated on the basin, the night, and the bank, so it is very difficult to adjust the quantity accordingly. Enthusiasm from both parties. Chrysanthemum is normally harvested and distributed with all petals completely closed, and if the petals are too open at the time of market arrival, the value of the product will be significantly reduced. Particularly at temperatures higher than 10 ° C., these phenomena are likely to occur, and no effective freshness maintaining method has been found so far.

  Japanese Patent Laid-Open No. 9-107879 (patent document 1) discloses a method for storing chrysanthemums in a hermetically sealed manner using a synthetic resin film having an oxygen and carbon dioxide permeation rate of 4,000 to 8,000 cc / bag / 24 h · atm per kg of chrysanthemums. In addition, a method for storing chrysanthemums having an atmosphere of 0 to 5 ° C. and an oxygen concentration of 10 to 19% and a carbon dioxide concentration of 1 to 10% is described. With this method, the flowering of chrysanthemums can be delayed a little, but since the temperature at the time of storage is limited to 0-5 ° C, refrigeration equipment is necessary. There was a need for a method that could be easily stored and shipped.

JP-A-9-107879

  When storing and transporting chrysanthemums in a temperature range higher than 10 ° C., the chrysanthemum storage method disclosed in Patent Document 1 cannot be applied because the temperature is limited to 0 to 5 ° C. In the present invention, the chrysanthemum flower is delayed in the high temperature range where it is difficult to keep the freshness of the chrysanthemum flowers under the conditions disclosed in Patent Document 1, the yellowing of the leaves is delayed, and the wilting is delayed, so even in the higher temperature range, the chrysanthemum It aims at providing the packaging bag which can preserve | save.

  The present invention solves the problem relating to maintaining the freshness of chrysanthemum cut flowers, which is easy to bloom, leaves tend to yellow, and in the market distribution stage, the commercial value is significantly reduced when the buds open. In addition, because it is used especially at funerals, the appearance of freshness of the chrysanthemum cut flowers, less petal browning, less decay, less mold, less yellowing of leaves and less off-flavors Resolve the challenges inherent to chrysanthemum cut flowers.

  As a result of intensive studies to solve the above-described problems in the prior art, the present inventor packs the oxygen permeation amount per 100 g of chrysanthemum cut flowers in a specific range of packaging bags without preserving the chrysanthemums at low temperatures. As a result, it was found that the effect of maintaining the freshness of chrysanthemum flowers was enhanced, and that it could be stored and transported for a long time, and the present invention was completed.

That is, the present invention (1)
A packaging bag for maintaining freshness of chrysanthemum cut flowers made of a polymer film, wherein the packaging bag for maintaining freshness has fine holes, and the average storage temperature T (° C) of the chrysanthemum cut flowers is higher than 10 ° C and 30 ° C. The oxygen permeation amount P (cc / 100 g · day · atm) of the freshness-keeping packaging bag per 100 g of chrysanthemum at 23 ° C. is 200 to 4500 cc / 100 g · day · atm. This is a packaging bag for maintaining the freshness of cut flowers.

Furthermore, the present invention provides
(2) The total opening area of the micropores of the cut flowers Freshness packaging bag of the chrysanthemum is greater than 1 × ¹⁰ -3 ^mm 2 / 100g per cut flowers 100g chrysanthemum 3 × ¹⁰ -1 ^mm 2 / 100g or less A packaging bag for keeping freshness of cut chrysanthemum flowers according to (1) above,
(3) The chrysanthemum cut flower freshness-keeping packaging bag according to claim 1 or 2, wherein the fine holes of the chrysanthemum cut flower freshness keeping packaging bag are fine holes having an average pore diameter of 5 to 1000 µm.
Further, the present invention is a method for keeping freshness of chrysanthemum cut flowers, which preserves chrysanthemum cut flowers using the packaging bag for keeping freshness of chrysanthemum cut flowers according to any one of the above (1) to (3).

  According to the present invention, cut chrysanthemum flowers can be packaged to prevent chrysanthemum flowering for a long period of time at a temperature higher than 10 ° C., and the chrysanthemum can be stored in a uniform state. It is possible to provide a method for preserving chrysanthemum cut flowers and a packaging bag for maintaining the freshness of chrysanthemum cut flowers that exhibit an excellent freshness-keeping effect without deteriorating the commercial value even if they are displayed in stores. Therefore, according to the present invention, it is possible to solve the problem of maintaining the freshness of chrysanthemum cut flowers that the flower value is easy to bloom, the leaves are easily yellowed, and the commercial value is significantly reduced if the buds are opened too much in the market distribution stage. Chrysanthemum is used especially at funerals, so in keeping the freshness of chrysanthemum, the chrysanthemum cuts are unique in terms of appearance and off-flavor, such as less petal browning, less rot, less leaf yellowing, etc. The problem can be solved.

  The method for preserving cut chrysanthemums according to the present invention is a method for preserving cut chrysanthemum flowers by packaging the chrysanthemum cut flowers with a polymer film, and maintaining the freshness of the chrysanthemum cut flowers during storage. This is a method for preserving cut chrysanthemum flowers in an amount of 200 to 4500 [cc / (100 g · day · atm)] per 100 g of chrysanthemum.

  In the method for preserving chrysanthemum cut flowers according to the present invention, the chrysanthemum cut flowers are harvested and then wrapped with a polymer film, and the chrysanthemum is stored (preserved). Thereafter, the chrysanthemum cut flowers are shipped, transported, and displayed in stores. The average storage temperature after packaging with a polymer film is generally higher than 10 ° C and lower than 30 ° C. Although it is preferable to be within the above temperature range for shipping, transportation, and store display, it may be difficult depending on the situation, and the average storage temperature including the temperature during storage is higher than 10 ° C and lower than 30 ° C. It is preferable to be stored, and at least during storage, it is stored in the above range. In the present invention, the package refers to the chrysanthemum cut flowers packaged with the polymer film.

  The chrysanthemum used in the present invention is a perennial plant belonging to the family Asteraceae, which may be either a large chrysanthemum having a flower diameter of 16 cm or more, a small chrysanthemum having a diameter of 6 cm or less, or a middle chrysanthemum having an intermediate size. The flower is suitable for maintaining the freshness of a single chrysanthemum, but it can be used as long as it can be used as a cut flower. Considering the packaging material cost per chrysanthemums and the packaging effort, it is preferable to package 10 or more and 100 or less in one bag. More preferably, it is preferable to package 30 or more and 100 or less in one bag.

The polymer film according to the method for preserving chrysanthemum cut flowers of the present invention is not particularly limited as long as it is a polymer film used for packaging fruits and vegetables. Examples of the material include polyethylene, polypropylene, and polychlorinated Examples thereof include vinyl, polyamide, polyester, polylactic acid, and the like, or composite materials thereof. These may be subjected to antifogging processing or printing. Further, it may be a stretched film or an unstretched film. Among these materials, those having a moisture permeability of 30 (g / m ² · day) (measurement method: JIS Z 0208) or less, such as polypropylene and polyethylene, are preferable in terms of maintaining freshness. Furthermore, laminate films such as polypropylene, polyethylene terephthalate and polyethylene are preferable in terms of strength.

  The thickness of the polymer film is not particularly limited, but is usually 15 to 60 μm, and preferably 25 to 52 μm from the viewpoint of handling and cost.

  The average storage temperature of the chrysanthemum cut flower package of the present invention is preferably higher than 10 ° C and not higher than 30 ° C. If it is 10 ° C. or less, the flowering suppression effect may be insufficient, and if it exceeds 30 ° C., the decay of cut flowers will be accelerated, and it may be extremely difficult to preserve. Preferably, they are 12 degreeC or more and 28 degrees C or less. In addition, as long as it preserve | saves in this temperature range, it is not necessary to preserve | save in the place which has a thermostat, but you may preserve | save in the place which has a thermostat.

  The present invention is intended for the shipment of chrysanthemum cut flowers, but it should be understood that short-term storage of several days is possible within this condition, depending on the storage period and purpose. There are no restrictions.

In the method for storing chrysanthemum cut flowers of the present invention, the oxygen permeation amount of the freshness-maintaining packaging bag made of a polymer film is 200 to 4500 [cc / (100 g · day · atm)] per 100 g of chrysanthemum cut flowers at 23 ° C. It is. When the oxygen permeation amount at the time of storage is in the above range, an excellent freshness maintaining effect is obtained, and effects such as suppression of flowering and suppression of leaf yellowing are obtained. On the other hand, if the amount of oxygen permeation during storage is too small, petal browning and off-flavor generation will increase. Conversely, if there is too much oxygen permeation, it will be easy to flower or the leaves will become yellow.
Preferably, the oxygen transmission amount per 100 g of chrysanthemum cut flowers is 200 to 3000 [cc / (100 g · day · atm)], and more preferably, the oxygen transmission amount per 100 g of chrysanthemum cut flowers is 200 to 1200 [cc / (100 g · day · atm)].

  Chrysanthemum cut flowers are easy to blossom and the leaves tend to yellow. In the market distribution stage, the value of the product is significantly reduced when the buds start to move (flowers start to bloom). In addition, since it is used especially at funerals, the importance of maintaining the freshness of cut chrysanthemums is particularly important for the appearance of petals with less browning, less rot, less mold, and less yellowing of leaves. The

  In the present invention, the oxygen permeation amount P [cc / (100 g · day · atm)] during storage is the inside and outside of the package per day per 100 g of chrysanthemum cut flowers to be packaged at 23 ° C. Is the oxygen permeation amount per one atmospheric pressure difference.

When packaging chrysanthemum cut flowers using a polymer film having an oxygen transmission rate per unit area at 23 ° C. of F [cc / (m ² · day · atm)], the oxygen transmission rate P [cc / (100 g · day · atm)] is the oxygen permeation amount F [cc / (m ² · day · atm)] per unit area of the polymer film at 23 ° C., and the effective surface area S ( The value obtained by multiplying m ² ) is divided by the mass W (g) of the chrysanthemum cut flowers to be wrapped, and multiplied by 100. For example, the oxygen permeation amount per unit area of the polymer film at 23 ° C. is f [cc / (m ² · day · atm)], the effective surface area of the polymer film is s (m ² ), and the packaged cut chrysanthemum flowers When the mass of is w (g), the oxygen permeation amount P during storage is
P = f × s × (100 / w)
It becomes. The effective surface area of the polymer film refers to the surface area of the part of the polymer film that can participate in oxygen permeation, and the part that cannot participate in oxygen permeation, such as the part that is bonded for sealing. It is the surface area to exclude. For example, in the case where two rectangular polymer films are sealed by heat-sealing four sides and the chrysanthemum cut flowers are packaged, the inner surface area of the sealed packaging bag is the effective surface area of the polymer film. It is.

  In the method for storing chrysanthemum cut flowers of the present invention, micropores having an average pore size of 5 to 1000 μm, preferably an average pore size of 20 to 400 μm, more preferably an average pore size of 20 to 100 μm are formed in the polymer film, and the size of the micropores is determined. By selecting the thickness and number, the oxygen permeation amount P during storage can be adjusted within the above range.

  The shape of the packaging bag for maintaining freshness prepared using the polymer film is not particularly limited.

  In the method of preserving chrysanthemum cut flowers of the present invention, the chrysanthemum cut flowers are put in the polymer film and sealed, and as a method of sealing the polymer film, heat sealing, banding band, rubber band, caulking, etc. There is no particular limitation. In this case, the chrysanthemum cut flowers may be put in the polymer film in a state of being placed in a breathable container. Further, in the method for preserving cut chrysanthemum flowers of the present invention, the packaging form is not limited to a bag-packed form, for example, a form that is top-sealed in a tray container, or a cardboard box and the polymer film May be integrated with each other.

  In the method for preserving chrysanthemum cut flowers according to the present invention, the chrysanthemum cut flowers are harvested and then packaged with the polymer film, and the package in which the chrysanthemum cut flowers are packaged with the polymer film is preserved. Cut flowers are shipped, transported and displayed in stores. The method for preserving cut chrysanthemums according to the present invention is applied not only to storage in a storage room but also to shipping, transportation, and the like. The average storage temperature after packaging with the polymer film is higher than 10 ° C and lower than 30 ° C. Although it is preferable to be within the above temperature range for shipping, transportation, and store display, it may be difficult depending on the situation, and the average storage temperature including the temperature during storage is higher than 10 ° C and lower than 30 ° C. It is preferred that That is, the method for storing chrysanthemum cut flowers of the present invention is a storage method under the above average storage temperature conditions.

  The method for preserving chrysanthemum cut flowers according to the present invention is suitably performed by the following packaging bag for keeping freshness of chrysanthemum cut flowers according to the present invention.

The packaging bag for keeping freshness of chrysanthemum cut flowers of the present invention is a packaging bag for keeping freshness of chrysanthemum cut flowers made of a polymer film,
At 23 ° C., the freshness-keeping packaging bag P at the time of preservation of cut chrysanthemum has an oxygen permeation amount P of 200 to 4500 [cc / (100 g · day · atm)]. Preferably, it is 200 to 3000 [cc / (100 g · day · atm)], and more preferably 200 to 1200 [cc / (100 g · day · atm)].
When the oxygen permeation amount P of the freshness-keeping packaging bag during storage of the chrysanthemum cut flowers is within the above range, the freshness-keeping effect is enhanced. In particular, when the oxygen permeation amount P of the freshness-keeping packaging bag during storage of the cut chrysanthemum flowers is within the above range, the progress of flowering of the chrysanthemum cut flowers is suppressed, and yellowing of the leaves is reduced. Deterioration is reduced and generation of off-flavors is reduced.

  The chrysanthemum cut flowers according to the packaging bag for keeping freshness of chrysanthemum cut flowers according to the present invention are the same as the cut chrysanthemum flowers according to the preservation method of chrysanthemum cut flowers according to the present invention. The packaging bag for keeping freshness of chrysanthemum cut flowers is a packaging bag for keeping freshness of cut chrysanthemum flowers, which is stored in the range of higher than 10 ° C. and not higher than 30 ° C. as an average storage temperature after packaging the cut flowers of chrysanthemum.

  The material of the polymer film according to the packaging bag for keeping freshness of chrysanthemum flowers according to the present invention is the same as the material of the polymer film according to the preservation method of chrysanthemum flowers according to the present invention.

  The thickness of the polymer film is not particularly limited, but is usually 15 to 60 μm, and preferably 25 to 52 μm from the viewpoint of handling and cost.

  The freshness-keeping packaging bag has micropores in order to adjust the oxygen permeation amount P of the freshness-keeping packaging bag during storage of the chrysanthemum cut flowers or the oxygen permeation amount F per unit area of the polymer film. In this case, the average pore diameter of the micropores is 5 to 1000 μm, preferably 20 to 400 μm, and more preferably 20 to 100 μm.

Opening area of the fine pores is at 3 × ¹⁰ -1 ^mm 2 / 100g or less larger than the cut flowers 100g per 1 × ¹⁰ -3 ^mm 2 / 100g chrysanthemum, more preferably 1 × ¹⁰ -3 ^mm 2 / 100g large 7 × ¹⁰ -2 ^mm 2 / 100g or less, more preferably not more than 1 × ¹⁰ -3 ^mm 2 / greater than ^{100g 3 × 10 -2 mm 2 /} 100g. The opening area of the micropores per 100 g of chrysanthemum cut flowers is the mass W (g) of chrysanthemum cut flowers packed in the freshness-keeping packaging bag, and the fine holes opened in the effective surface area of the polymer film. It is a value obtained by dividing 100 by dividing the total area (mm ² ) of holes ({total area of micropores / mass of wrapped chrysanthemum cut flowers} × 100).

When the packaging bag for maintaining freshness of chrysanthemum cut flowers of the present invention is a packaging bag for maintaining freshness for packaging 10 to 100 (500 to 12000 g) chrysanthemum cut flowers, that is, maintaining the freshness of chrysanthemum cut flowers of the present invention. When the packaging bag for use is used as a packaging bag for packing 10 to 100 chrysanthemum cut flowers per bag, the oxygen permeation amount F per unit area of the polymer film at 23 ° C. is: 1000 to 130,000 [cc / (m ² · day · atm)], preferably 1300 to 70000 [cc / (m ² · day · atm)], and the effective surface area of the polymer film is 0.4 to 2 0.1 m ² , preferably 0.6 to 2.0 m ² . When the packaging bag for maintaining freshness of chrysanthemum cut flowers according to the present invention is used as a packaging bag for maintaining freshness for packaging 10 to 100 chrysanthemum cut flowers, the oxygen permeation amount F per unit area of the polymer film and effective By setting the surface area within the above range, the oxygen permeation amount P of the freshness-keeping packaging bag at the time of storing the chrysanthemum cut flowers can be within the above range, so that the freshness holding effect is enhanced.

  EXAMPLES Next, although an Example is given and this invention is demonstrated more concretely, this is only an illustration and does not restrict | limit this invention.

(Examples 1-11, Comparative Examples 1-3)
Three sides of the polymer film (OPP: stretched polypropylene film) of the thickness and material shown in Table 1 are heat-sealed to produce a rectangular packaging bag having the size shown in Table 1, and the micropores shown in Table 1 are formed. I opened it. Next, the chrysanthemum cut flowers (harvested at a flowering degree of 1 and the variety is Shinma) were packed in the packaging bag as shown in Table 1, and the bag opening was heat-sealed and sealed with a seal width of 10 mm. A package with cut flowers was obtained. At this time, the effective surface area S of the polymer film is the inner surface area of the package excluding the heat seal portion, and the oxygen permeation amount P during storage is a value shown in Table 1. The oxygen permeation amount P at the time of storage is determined by the following formula.
P = F × S × (100 / W)
P: Oxygen permeation amount of packaging bag per 100 g of packed chrysanthemum cut flowers
[(Cc / (100 g · day · atm)) (23 ° C.)
F: Oxygen permeation amount per unit area of polymer film at 23 ° C. [cc / (m ² · day
・ Atm)]
S: Effective surface area of polymer film (m ² )
W: Mass of chrysanthemum cut flowers packed in the package (g)
It is.

  Next, the package was stored at the temperature shown in Table 1 for a predetermined number of days. Table 2 shows the results of quality evaluation of chrysanthemum cut flowers for each storage period. In the quality evaluation, two packages were prepared for each storage day.

<Measurement of oxygen permeation amount F per unit area of polymer film>
(1) Preparation of packaging bag A rectangular packaging bag having four sides sealed by heat sealing with a polymer film having a hole area ratio shown in Table 1 is prepared. At this time, the packaging bag is prepared so that the inner surface area of the packaging bag after heat sealing is the effective surface area S (m ² ) of the polymer film, and S is 0.06 m ² or more. All the following operations are performed in an atmospheric gas atmosphere (23 ° C.).

(2) Enclosing nitrogen gas After sealing the packaging bag with heat sealing, the packaging bag is deaerated using an aspirator. Deaerate until both sides of the packaging bag are stuck. Next, this packaging bag is filled with nitrogen gas (pure nitrogen gas) using a white hard syringe. The filling amount of nitrogen gas depends on the bag size, but as much as possible is put in a range where tension is not applied to the packaging film, and the injection amount of nitrogen gas is measured using the scale of the syringe barrel. In addition, the injection needle is inserted into the packaging bag and the gas is taken in and out. When piercing the needle, a double-sided tape is attached to the polymer film, and an adhesive tape made of polypropylene film (hereinafter referred to as “PP tape”) is attached thereon. Moreover, after removing the needle, the needle hole is immediately closed with PP tape. The tape to be attached to the packaging bag should be within an area of 4.5 cm ² or less. Be careful not to block the micropores with PP tape.

(3) Measurement of initial oxygen concentration Immediately after nitrogen gas filling, it measured by gas chromatography (TCD), the amount of oxygen in a packaging bag was calculated | required, and oxygen concentration _C0 (volume%) was computed. In this case, _{if C 0} is greater than 0.2 vol%, the (1) and (2) repeat the operations. The sampling gas amount for measuring the oxygen concentration is 10 cc or less. About 1 cc is injected into the gas chromatography.

(4) Storage of packaging bag The packaging bag whose initial oxygen concentration was measured is stored in an incubator at 23 ° C. At this time, it is left to stand so that no objects are placed on the bag or the wind of the incubator fan is hit directly.

(5) Measurement of oxygen concentration in packaging bag and calculation of oxygen permeation amount during storage At least two points or more, changing the elapsed time, sampling the gas in the packaging bag, and measuring the oxygen concentration in the packaging bag. At this time, the elapsed time must be 3 hours or more immediately after nitrogen gas filling, and the oxygen concentration in the packaging bag must be in the range of 1% to 7%. A proportional relationship (correlation coefficient of 0.98 or more) needs to be established between the elapsed time t (time) and the oxygen concentration in the packaging bag. If the oxygen concentration in the packaging bag deviates from the range of 1% or more and 7% or less, or if the proportional relationship does not hold, retest. If the oxygen transmission amount of the polymer film is too large and the oxygen concentration in the packaging bag rises too quickly, and this condition cannot be cleared, a part of the polymer film is the same known material with a small oxygen transmission amount The bag may be made in the same manner by pasting it with the film. At this time, the surface area of the bag is excluded from the part pasted with another known film.

Next, the oxygen permeation amount F per unit area of the polymer film is calculated by the following formula.
F = {1.143 × (C _t −C ₀ ) × V} / (t × S)
F: Oxygen permeation amount per unit area at 23 ° C. [(cc / (m ² · day · atm)]
C _t : Oxygen concentration (volume%) in the packaging bag after time t from the time of filling with nitrogen gas ¹⁾
C ₀ : oxygen concentration (volume%) in the packaging bag immediately after nitrogen gas filling
V: Amount of nitrogen gas charged (cc)
t: Elapsed time immediately after nitrogen gas filling (hours) ¹⁾
S: Surface area inside packaging bag (effective surface area of polymer film) (m ² )
1) _Ct and t are calculated using the longest elapsed time value.

  In addition, when a bag is made by pasting a part of a polymer film with a film of the same material that has a small oxygen permeation amount, the oxygen permeation amount per unit area obtained by the above measurement is used. A value obtained by subtracting the oxygen permeation amount per unit area is the oxygen permeation amount per unit area of the target polymer film.

<Flower bloom>
Table 2 shows the results obtained by opening the packaging bag after storage for the number of storage days, taking out the chrysanthemum cut flowers, and performing the evaluation.
The flower buds were evaluated after storage according to the criteria for flowering degree (the following numerical values) described below.
1: Amber (with petals curled up)
3: A state in which several outer petals have spread 5: A state in which the entire outer petals have spread (the central petal is closed)
7: The state where the petals in the center have begun to spread (7 and above are all described as 7)
The diameter (mm) of the flower was measured before and after storage, and the ratio (diameter after storage / diameter before storage) is shown in Table 2.
In addition, the diameter of the chrysanthemum cut flowers (蕾) before starting the test is 14 to 17 mm, and these cut flowers (蕾) are chrysanthemums having a flowering degree of 1, and the test was conducted using chrysanthemums having a flowering degree of 1. .

<Sensory evaluation>
After storing for the storage days shown in Table 1, the packaging bag is opened, the chrysanthemum cut flowers are taken out, the appearance and odor are evaluated, and the results are shown in Table 2. Leaf yellowing, petal browning, wilting, mold, rot, and odor were scored in four stages (4: good, 3: normal, 2: slightly inferior, 1: inferior) by sensory evaluation. In the sensory test, if the score is 3 or more, the freshness maintaining effect is good.

Claims (3)

A packaging bag for maintaining freshness of chrysanthemum cut flowers made of a polymer film, wherein the packaging bag for maintaining freshness has fine holes with an average pore diameter of 5 to 1000 μm, and the average storage temperature T (° C.) of chrysanthemum cut flowers is The oxygen permeation P (cc / 100 g · day · atm) of the freshness-keeping packaging bag per 100 g of chrysanthemums at 23 ° C. is 200 to 4500 cc / 100 g · day · atm. A packaging bag for keeping freshness of cut chrysanthemum flowers. Claim total opening area of the micropores of the cut flowers Freshness packaging bag of the chrysanthemum is 3 × 10 ^-1 mm ² / 100g or less larger than the cut flowers 100g per 1 × 10 ^-3 mm ² / 100g chrysanthemum A packaging bag for keeping freshness of cut chrysanthemum flowers according to 1. A method for preserving and maintaining the freshness of chrysanthemum cut flowers, wherein the chrysanthemum cut flowers are preserved using the packaging bag for maintaining freshness of chrysanthemum cut flowers according to claim 1 or 2 .