JPH06329187A - Packing bag for cut flower - Google Patents

Abstract

PURPOSE:To help a cut flower keep freshness by employing a polyolefin film in which zeolite is incorporated and by forming the bag body in the shape of a cone. CONSTITUTION:A bag body 1 has the shape of a cone and is formed by laying a front film 2 on a back film 3, which are of a polyolefin film cut in a trapezoid, and by effecting a heat-sealing at the sides (a), (b). A polyolefin film coating zeolite can be used for both the front film 2 and the back film 3; however, a film formed by inclusion of zeolite assumes whitish cloudness like frosted glass and makes a cut flower 6 inside indistinct as seen from outside. Therefore it is preferable to limit the use of zeolite to either the front film 2 or the back film 3. Zeolite can be used in the ratio of 1-10wt.% to a polyolefin resin. Zeolite has an ability to adsorb and pass ethylene gas discharged by a cut flower by respiration and keep the cut flower fresh for a long time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for cut flowers which is excellent in retaining the freshness of cut flowers.

[0002]

BACKGROUND OF THE INVENTION It is well known to package bouquets with polyolefin films having low gas barrier properties.

[0003]

However, for example, cut flowers such as chrysanthemums, carnations, haze grasses and sweet pies can be kept fresh for at most 2-3 days when they are wrapped with a polyolefin film, and more than that. Then the vitality declined rapidly, and the flowers withered and the buds withered. It is considered that this is because the cut flowers release ethylene gas, even though they are slightly breathing, and accumulate in the packaging film, so that the vitality is lost quickly. Therefore, there has been a problem that when the cut flowers are shipped from the cultivated place to a market or a retail store and stored, their commercial value is reduced in a short period of time.

The present invention focuses on the fact that zeolite has a function of adsorbing, holding, and passing such a gas, and intends to provide a packaging bag for cut flowers made of a polyolefin film using the same. is there.

[0005]

The cut flower packaging bag of the present invention is characterized in that the bag body 1 having a conical shape is constructed by using a polyolefin film mixed with zeolite. Zeolites include SiO ₂ , ALO ₂ , H ₂ O,
It is a crystalline aluminosilicate containing Na ₂ O, CaO, etc. as its main components, and includes natural products and synthetic products. Typical natural products are Otani stone, etc.When using this ore, it is crushed, purified, and classified to a particle size that allows film formation, and then fired to release water of crystallization. Provides gas adsorption capacity and prevents foaming during molding. The synthetic product is produced by a hydrothermal reaction utilizing phase equilibrium under high temperature and high pressure, and when this is used, it is purified, classified and calcined like the natural product. Examples of the polyolefin film include polyethylene film and polypropylene film.

[0006]

[Function] The zeolite mixed in the polyolefin film has pores of a molecular unit generated when the water of crystallization in the zeolite is released by heating, and pores generated from the crystal structure. Since the cut flower breathes out ethylene gas that is breathed out, it absorbs, holds, and passes through it, so that it can be prevented from accumulating in the bag body 1.

[0007]

EXAMPLE FIG. 1 shows a cut flower packaging bag according to the present invention. The bag body 1 is a conical bag in which a front film 2 and a back film 3 each made of a polyolefin film cut into a trapezoid are overlapped and both sides a and b are heat-sealed, and a wide upper portion 4 and a narrow bottom portion are formed. 5 is open. When the cut flowers 6 are formed in advance in the conical bag in this way, it is sufficient to insert the cut flowers 6 from the wide upper portion 4, and the cut flowers 6 are wrapped with one flat polyolefin film and the free end of the film is taped or the like. The packaging work can be done efficiently without the hassle of stopping with.

Both the front film 2 and the back film 3 may be composed of a polyolefin film mixed with zeolite, but the polyolefin film formed by mixing zeolite is frosted like a frosted glass surface and becomes turbid. The cut flowers 6 are hard to see from the outside. Therefore, at least one of the front film 2 and the back film 3 is composed of a film containing zeolite, and the other film is composed of a transparent film without containing zeolite so that cut flowers 6 can be seen from the transparent film. Preferably. In this case, it is preferable that the film 3 on the side where the zeolite is mixed is colored (for example, green) by mixing a colorant so that the white turbidity of the surface of the film 3 is not noticeable and the film 3 looks beautiful.

The amount of zeolite (synthetic material) mixed with the polyolefin resin is 1 to 10% by weight, preferably 5% by weight. If it is less than 1% by weight, the effect of maintaining the freshness of cut flowers 6 is not improved. If it is 10% by weight or more, the film-forming property becomes poor when the polyolefin film is formed by a molding machine.
Problems such as insufficient film strength occur, and the abrasion of the screw that mixes the polyolefin resin and zeolite in the cylinder of the molding machine accelerates. The following are preferred.

Carnation and haze grass were packed and placed in a conical bag body 1 made of a polyolefin film containing 5% by weight of zeolite (synthetic compound) and kept fresh for a week. After a week, I started to lose energy after a week.

By providing a large number of small ventilation holes 7 in the central region or the entire region of the bag body 1 in the vertical direction, the ethylene gas emitted by the cut flowers is better discharged to the outside of the bag, and the freshness of the cut flowers 6 is maintained. It was also confirmed to be more effective than the above.

[0012]

EFFECTS OF THE INVENTION According to the present invention, the polyolefin film forming the conical bag body 1 is mixed with zeolite capable of adsorbing and passing ethylene gas emitted by the respiration of cut flowers. It has become longer than the conventional 2-3 days and can be made to last as long as one week.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cut flower in a wrapped state.

[Explanation of symbols]

 1 bag body 2 front film 3 back film 6 cut flowers

Claims (1)

[Claims] 1. A packaging bag for cut flowers, characterized in that a conical bag body 1 is formed by using a polyolefin film mixed with zeolite.