JPH089779A - Package for retaining freshness of natural flower - Google Patents

Abstract

PURPOSE:To obtain a package capable of retaining the freshness of a natural flower, preventing wilting, excellent in retaining properties of the freshness for a long period and suitable for cut flowers, etc., by packaging the natural flower with a plastic film, then replacing the remaining gas in the interior with gaseous carbon dioxide at a prescribed concentration and hermetically sealing the package. CONSTITUTION:The package for retaining the freshness of a natural flower is obtained by packaging the natural flower with, e.g. a plastic film having 3000-10000cc/m<2>.24hr.atm carbon dioxide permeability and many fine pores having several mum to 100mum pore diameter, then replacing the remaining gas in the interior of the resultant package with a gas at 3-50% carbon dioxide concentration and hermetically sealing the package. Furthermore, the composition of the replacing gas other than the carbon dioxide is preferably 3-20% oxygen and 30-94% nitrogen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package capable of maintaining the freshness of fresh flowers such as cut flowers for a long period of time. Particularly, cut flowers can be prepared by placing them in a plastic film under a high carbon dioxide concentration. It is intended to maintain the freshness of.

[0002]

2. Description of the Related Art Conventionally, as a packaging form for transporting cut flowers, most of them are packed directly in a cardboard box and transported. In addition, cut flowers may be inserted into a bucket filled with water to prevent wilting and transported as it is. More recently, a water retaining member has been provided on the bottom of a cardboard box, and the cut flowers are packaged and transported with the cut ends inserted, or the cut ends are covered with a water retention agent for transportation.

[0003]

However, there is a problem that cut flowers wither because the water is not replenished by directly packing the cardboard boxes, and when the cut flowers are inserted into a bucket filled with water, the cut flowers become heavy. Since the space also becomes large, there is a problem that the transportation cost is high, and the cost is also increased when the water retention member or the water retention agent is used. In addition, no freshness-preserving effect other than wilting prevention can be expected.

On the other hand, placing the cut flowers under high carbon dioxide concentration is known to a long shelf life effect, by utilizing this cut flowers of CA (C ontrolled A tmo
Research on sphere) storage is also underway. For example, as shown in Japanese Utility Model Publication No. 5-29350, there is a fresh flower freshness storage container in which cut flowers are stored in a plastic container and the internal gas is replaced with carbon dioxide gas, etc.
This is a large-scale structure composed of plastic molded products.After storing cut flowers in the assembled container, there is an exhaust hole for evacuating the inside of the container, a gas selective permeable membrane and carbon dioxide for closing it. A ventilation small hole for introducing gas and a membrane having a small gas permeability for closing the small hole are required, resulting in a large number of parts and high cost.

Further, since the one shown in Japanese Utility Model Publication No. 5-29350 is intended to be used as an ornamental container as it is, it is necessary to give a high-grade feeling as a plastic molded product as described above, so that it is not an expensive vegetable. I have no choice.

[0006] Therefore, the present inventors propose the present invention for the purpose of providing a simple package for surely maintaining the freshness of cut flowers at the transportation stage from the market to over-the-counter to consumers.

[0007]

In order to achieve the above object, the freshness-retaining package of the present invention has a structure in which a fresh flower is wrapped with a plastic film and the residual gas inside has a carbon dioxide concentration of 3 to 3.
It was replaced with 50% gas and hermetically sealed. Further, the composition other than carbon dioxide of the gas to be replaced is set to 3-20 oxygen.
%, And nitrogen is 30 to 94%. In addition, the carbon dioxide permeability of the plastic film is 1000 to 10
000 / m ² 24 hr · atm. In addition, the plastic film has a pore size of several μm to 100 μm.
It has a large number of fine holes.

[0008]

According to the present invention, since the gas (mainly oxygen gas) remaining in the space inside the plastic film in which the fresh flowers are packaged is replaced by the high-concentration carbon dioxide gas and sealed, the fresh flowers The freshness is maintained for a long time and wilting is prevented.

Specific examples will be described below.

[0010]

【Example】

Example 1 A laminated film of a stretched polypropylene having a film thickness of 40 μm and a polyethylene having a film thickness of 20 μm (having a carbon dioxide permeability at 25 ° C. of 3000 cc / m ² 2
4 hr · atm), fine pores having a pore diameter of about 5 to 10 μm, at a density of about 10 ⁶ holes / m ^2, at equal intervals.
As shown in No. 99, a square sheet formed by passing between rollers coated with diamond particles on one surface of a pressing roller is folded in two from the center,
The two side ends are heat-sealed to form a bag of which length × width is 20 × 65 cm with one end open. After storing carnation, lisianthus and delhinium from the opening of this bag, carbon dioxide 5%, oxygen 20%, nitrogen 75
% Of the mixed gas is attached to the outside of the bag with a rubber seal, and a syringe-like jig is pierced at that point to inject it into the bag, and at the same time replace the residual gas in the bag, then heat the opening of the bag. Sealed.

Example 2 Carbon dioxide permeability at 25 ° C. was 5000 cc / m ² with the same material composition as in Example 1 but also with fine pores.
After storing carnation, lisianthus, and delhinium from the opening of the bag made from the laminated film of 24 hr.atm, carbon dioxide 20%, oxygen 1
Gas of 0% and 70% of nitrogen was introduced into the bag by the same method as in (Example 1) to replace the residual gas in the bag, and then the opening of the bag was heat-sealed.

(Embodiment 3) The carbon dioxide permeability at 25 ° C. is 10000 cc / m 2 at 25 ° C. with the same material structure as in Embodiment 1 but also with fine pores.
Respectively, from the opening of the bag made from laminated films ² · 24hr · atm, carnation, Turkey bellflower, after storing Deruhyuumu, 50% carbon dioxide, 5% oxygen, nitrogen 45% gas (Example 1) It was introduced into the bag by the same means to replace the residual gas in the bag, and then the opening of the bag was heat-sealed.

(Embodiment 4) The carbon dioxide permeability at 25 ° C. is 8000 cc / m ² having the same material constitution as that of (Embodiment 1) and having fine pores similarly.
・ From the opening of the bag made from the laminated film of 24 hr ・ atm, carnation, lisianthus,
After containing delphinium, a gas of carbon dioxide 20%, oxygen 20%, nitrogen 60% was introduced into the bag by the same means as in (Example 1) to replace the residual gas in the bag, and then the bag was opened. The part was heat-sealed.

COMPARATIVE EXAMPLE 1 Carnation, lisianthus, and delhinium were stored in the opening of a bag made of a laminated film having the same material structure as that of Example 2 and similarly having fine holes, and then oxygen 10 was added. %, 90% nitrogen gas (Example 1)
It was introduced into the bag by the same means as above to replace the residual gas in the bag, and then the opening of the bag was heat-sealed.

COMPARATIVE EXAMPLE 2 Carnation, lisianthus, and delhinium were respectively stored from the opening of a bag made of a laminated film having the same material structure as that of Example 2 and similarly having fine pores, and then carbon dioxide. Gases of 70%, oxygen 10% and nitrogen 20% were introduced into the bag by the same means as in (Example 1) to replace the residual gas in the bag, and then the opening of the bag was heat-sealed.

Comparative Example 3 Carbon dioxide permeability at 25 ° C. is 1500 cc / m ² having the same material structure as in Example 1 but also having fine pores.
・ From the opening of the bag made from the laminated film of 24 hr ・ atm, carnation, lisianthus,
After storing the delphinium, a gas of carbon dioxide 20%, oxygen 10%, nitrogen 70% was introduced into the bag by the same means as in (Example 1) to replace the residual gas in the bag, and then the bag was opened. The part was heat-sealed.

Comparative Example 4 Carbon dioxide permeability at 25 ° C. is 20,000 cc / m at 25 ° C. with the same material structure and fine pores as in (Example 1).
Respectively, from the opening of the bag made from laminated films ² · 24hr · atm, carnation, Turkey bellflower, after storing Teruhinyuumu, bags similar means as (Comparative Example 3) and the same gas (Example 1) It was introduced into the chamber to replace the residual gas in the bag, and then the opening of the bag was heat-sealed.

Table 1 shows the carbon dioxide permeability and the composition of the substituted gas of the laminated films used in Examples 1 to 4 and Comparative Examples 1 to 4.

[0020]

[Table 1]

The carnation, eustoma grandiflorum, and delhinium packaged as in Examples 1 to 4 and Comparative Examples 1 to 4 were each stored at 10 ° C. for 14 days, and the freshness retention state was observed. The results are shown in Tables 2-4.

[0022]

[Table 2]

[0023]

[Table 3]

[0024]

[Table 4]

[0025]

As described above, according to the present invention, the freshness can be maintained for a period of 3 to 10 days or longer, depending on the type of fresh flowers (cut flowers etc.). Moreover, the effect is brought about not only by preventing the wilting caused by the film packaging but also by replacing with a gas containing a high concentration of carbon dioxide. Further, the present invention is not limited to the cut flowers shown in the examples, and is suitable as a package of various cut flowers.

Claims (4)

[Claims] 1. A freshness-maintaining package for fresh flowers, which is obtained by hermetically packing fresh flowers with a plastic film, wherein after packing fresh flowers with a plastic film, the residual gas inside is replaced with a gas having a carbon dioxide concentration of 3 to 50%. A fresh-flower freshness-preserving package, which is characterized in that it is then sealed. 2. A composition other than carbon dioxide as a gas to be replaced,
Oxygen is 3 to 20% and nitrogen is 30 to 94%, The fresh flower freshness keeping package according to claim 1, which is characterized in that. 3. The fresh flower freshness keeping package according to claim 1, wherein the plastic film has a carbon dioxide permeability of 3000 to 10000 cc / m ² 24 hr · atm. 4. A plastic film having a pore size of several μm to 1
The fresh-flower freshness-keeping package according to claim 1, which has a large number of fine holes of 00 μm.