JPH08253269A - Container for exclusive use for raw shiitake mushroom - Google Patents

Abstract

PURPOSE: To obtain a container which can maintain freshness of raw shiitake mushrooms without drying and can prevent contents from deforming or being damaged due to an external pressure by seal-packaging an entire body by a film whose oxygen permeability and vapor permeability are at specific values. CONSTITUTION: After raw shiitake mushrooms 5 are received in a cup-like container, the entire container is seal-packaged by a film 4 wherein oxygen permeability at 23 deg.C is 3000 to 30000cc/m<2> .24hrs.atm and vapor permeability at 40 deg.C with 90%RH is 20 to 300g/m<2> .24hrs.atm. One or more small holes having a diameter of 2 to 20mm is provided on a body or a bottom of the container or on both. Thus deformation and damage of contents due to an external pressure is eliminated, wherein the small holes provided on the container and an opening or the like on a top part, and gaps between the respective holes and openings and the sealed film for maintaining freshness improve air convection in the container, thereby preventing the mushrooms from partially getting sticky or drying.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] It can be used as a dedicated container for distribution and sale of fresh shiitake mushrooms.

[0002]

2. Description of the Related Art Mushrooms such as shiitake mushrooms, maitake mushrooms, oyster mushrooms, tsutake mushrooms (mushrooms) and shirotamogi mushrooms (also known as shimeji mushrooms) are stretch-wrapped in a tray as shown in FIG. The tray material is predominantly used, and the tray material is made of hard polyvinyl chloride, expanded polystyrene, expanded polystyrene, polystyrene paper or the like, and the stretch film is made of soft polyvinyl chloride or polyethylene film. As other forms, only a part is net-packed with shiitake mushrooms and deaerated with enoki mushrooms. For gifts and the like, it is usually not put in a plastic basket and sealed.

[0003]

[Problems to be Solved by the Invention] When fresh shiitake mushrooms are stored in a tray for fruits and vegetables and stretch-wrapped, the shiitake mushrooms may become damp, and air retention in the container may lead to generation of aerial mycelia. Also, in the net packaging, fresh shiitake mushrooms are easily dried, and because they are exposed to oxygen, breathing is actively performed and the freshness of the mushrooms deteriorates quickly. Therefore, there is provided a packaging container capable of maintaining freshness of fresh shiitake mushrooms, preventing the contents from being deformed or damaged by external pressure without drying them, and further usable for gifts and the like.

[0004]

In view of the object of the present invention,
The inventors of the present invention have conducted intensive studies and have invented the following container for live shiitake mushrooms. That is, after storing fresh shiitake mushrooms in a cup-shaped container, the oxygen permeability at 23 ° C was 3,000.
In ^{~ 30,000cc / m 2 · 24hrs ·} atm, 40 ℃, raw shiitake mushrooms, wherein a water vapor permeability at 90% RH sealed packaging across the film is ^{20 ~ 300g / m 2 · 24hrs} · atm It is a dedicated container. Further, by providing at least one small hole having a diameter of 2 to 20 mm in the body portion, the bottom portion, or both of the cup-shaped container, a freshness-retaining effect is exhibited. Further, the cup-shaped container is formed of paper or a composite material containing paper as a main material, which is also convenient as a waste countermeasure.

The present invention will be described in detail with reference to the drawings. Shiitake mushrooms are agricultural products that vary in size or shape, and like other agricultural products, they are inspected after harvesting and excluding those with poor quality and extreme nonstandard specifications, and shipable products in the packaging process. . FIG. 1 shows an embodiment of a container for live shiitake mushrooms according to the present invention. Raw shiitake mushroom 5 is extremely fragile and easily rots, but on the other hand, it has the property of drying immediately and browning if left as it is. Although various types can be used as the cup-shaped container 1 of the main body in the present invention, for example, in the case of a paper cup, first, a blank obtained by punching a cup base paper into a fan shape by a cup forming machine is used. After sticking on the cylinder, the molded bottom paper and the bottom of the cylinder paper are turned inside and the bottom paper is scissors-bonded. Next, a lip curl is formed in the opening portion (which is originally called as a mouth opening portion in a beverage cup or the like) to reinforce the strength from the side. The cup-shaped container made of plastic can be manufactured by a sheet molding method, an injection molding method, or the like, and its shape may be molded according to the shape described as an example of the paper cup. However, as for the lip curl in the paper cup, for a plastic cup, for example, a flange portion for heat sealing may be provided with a width of about 3 to 10 mm. Further, in the injection molding, the one equivalent to the thread tail of the paper cup is possible, but in the sheet molding method, by increasing the projection corresponding to the so-called bottom rib provided at the bottom, the child effect of the cage (air at the bottom or (Prevention of water retention) can be expected. The shape of the cup-shaped container is not necessarily limited to a perfect circle cup. An oval shape or a polygonal container having curved portions at its corners may be used.

The lid may be omitted in terms of maintaining freshness, but it is necessary for pressure resistance when the containers are stacked, and a molded lid made of a plastic sheet may be used.
A paper lid may be used for a paper cup or the like. The paper lid 2 is also formed by a normal paper lid forming machine, but a large viewing window 7 (hereinafter referred to as an opening) is provided at the center of the top plate. In the case of a plastic cup, it can be made by sheet molding or injection molding. In this case as well, the top opening may be large, but in the case of a molding lid made of a transparent plastic sheet, it is not necessary to provide a large opening as long as the state of the live shiitake mushroom can be visually recognized through the sheet.

[0007] Whether it is a paper cup or a plastic container, if fresh shiitake mushrooms are stored and hermetically sealed, the air in the container is likely to accumulate, which is a condition for promoting bacterial growth. Or / and by providing a small hole in the cylinder paper, the air easily convects, including the gap between the bottom sealing film and the bottom sheet of the container and the gap between the cylinder paper and the sealing film. It acts to prevent the growth of bacteria due to retention. It was possible to improve the above-mentioned adverse effects such as prevention of aerial hyphae. The size of the small holes provided in the bottom paper or the cylinder paper may be in the range of 2 mm to 20 mmφ. If the diameter of the small holes is 2 mmφ or less, the effect of air convection is lost, and if it is 20 mmφ or more, there is a risk of affecting the strength of the container.

The number of small holes provided on the bottom paper and / or the cylinder paper is preferably about 1 to 30, and the number of holes may be increased or decreased depending on the size of each small hole. As a standard example, in the case of a paper cup containing 10 fresh shiitake mushrooms, both the body and bottom
It is enough to provide 5 to 6 10mmφ small holes.

In the case of a paper cup, printing can be freely performed on the side surface of the main body of the paper cup, and it can be said that this is a packaging container with high sales promotion. Moreover, by providing an opening in the top, the freshness of the shiitake mushroom can be observed from the opening. By providing this opening, it is difficult to label a large area on the top or to print on the freshness-keeping film, so by attaching a label or the like around the opening, the brand etc. can be displayed. It is possible to do so.

The paper cup is characterized in that it has a thread tail at the bottom of the cup, so that the bottom paper is several mm above the floor surface, and therefore a gap is formed between the bottom surface and the floor. are doing. In the present invention, when the entire container is sealed with the freshness-keeping film, the air in the container is partially removed due to the existence of the gap between the film and the bottom paper of the paper cup and the small holes provided in the bottom paper. 2 has a top curl portion of the cup as shown in FIG. 2, so that the freshness-preserving film does not adhere to the side surface. It has the same effect as preventing the retention of air on the bottom surface and prevents the generation of aerial hyphae. Even when a plastic cup is used, it may be designed to have a shape corresponding to the tail of the paper cup and the top curl of the container. As a material that can be used in the case of a plastic cup, in a sheet molding method (vacuum, pressure molding, etc.), a single sheet of polyvinyl chloride, polystyrene, polypropylene, polycarbonate, or the like, or two or more layers of these resin layers are used. A composite multilayer sheet or the like can be used. In the case of the cup formed by sheet molding, for example, a paperboard coated with an adhesive that is activated by molding heat or the like is inserted into a molding die, and the heat of molding the resin sheet causes the side surface of the cub container or / and It may be a container reinforced by adhering to the bottom surface. In this case, the molding portion of the sheet and the paperboard may be bonded to each other, and the bonding method is not limited. In addition, polyethylene, polypropylene, polystyrene and the like can be preferably used in the injection molding method.

The fresh shiitake mushrooms 5 are stored in the obtained cup-shaped container 1. However, as described above, the container is used when a paper lid is used so that the freshness of the fresh shiitake mushrooms can be clearly seen. The lid is provided with an opening, and the handle is arranged so that the back side of the umbrella can be seen from the opening 7 of the cup lid. After a while
The whole is sealed with a film 4 having a function of keeping freshness.

The lid used in the present invention is a paper or a molding lid mainly made of paper, or a plastic molding lid formed by molding a transparent plastic sheet.
Above all, the paper or the molding lid mainly made of paper is shown in FIG.
It is preferably in the form shown in (b), and by providing a hole (opening) of 1/3 or more on the top surface thereof, the freshness, shape, etc. of the shiitake mushroom inside can be visually recognized from the outside of the container. If the molded lid made of a plastic sheet is transparent, the shape and freshness of the shiitake mushroom can be visually recognized from the outside, and therefore it is not necessary to provide an opening as in a lid made of paper.

As the cup-shaped container used in the present invention,
For example, a paper cup or the like is optimal. The cup used at that time is preferably a hot cup type (usually used for hot drinks) of composite paper in which PE is laminated on paper. The paper cup has various features on its side surface, such as free printing, light weight, and incineration after use. Depending on the number of fresh shiitake mushrooms to be placed, select a material that considers the size of the paper container, water resistance, etc. For example, a polyethylene thin film is formed on the inner surface of the paper cup and a water-resistant overprint (OP) is formed on the outer surface by printing.

Fresh shiitake mushrooms are housed in a cup container and hermetically packaged with a film. In order to maintain the freshness of the fresh shiitake mushrooms for a long period of time, it is important to select the film for hermetically sealing. The packaging form is not particularly limited as long as it can be hermetically sealed, and stretch packaging, pillow packaging, shrink packaging and the like can be used. Like other mushrooms, fresh shiitake mushrooms exhibit a freshness-retaining effect by being hermetically packaged with a film having appropriate oxygen permeability and water vapor permeability. According to the study by the present inventors, the appropriate oxygen permeability and water vapor permeability are 3,000 to 30,000 cc / m as the oxygen permeability.
The range is ²・ 24hrs ・ atm, and the water vapor permeability is 20 to 300g / m ²・ 24hrs ・ atm at 40 ℃ and 90% RH.
A freshness-retaining effect is exhibited by packaging with a film within the range. Oxygen permeability of 3,000cc / m ² · 24hrs
・ If it is less than atm, the offensive odor due to the hypoxic respiratory disorder is likely to occur, and the commercial value thereof is significantly reduced. Further, when the oxygen permeability is 30,000 cc / m ² · 24 hrs · atm or more, the oxygen concentration in the system does not decrease, the MA effect is difficult to obtain, and the freshness such as generation of aerial hyphae and browning occurs. Furthermore, it is important to define the water vapor permeability as well as the oxygen concentration. That is, when the water vapor permeability is 300 g / m ² · 24hrs · atm or more, loss due to transpiration, drying, and shrinkage occur, and conversely, when it is 20 g / m ² · 24hrs · atm or less, it accumulates inside the package. Moisture becomes a hotbed for mold and putrefaction, and in all cases, the freshness is significantly reduced. For occasions such as when picking mushrooms, the container according to the present invention has a convenient and convenient form. It suffices to put mushrooms in a cup-shaped container and perform hermetic packaging with a shrink wrapping machine or a stretch wrapping machine provided at the outlet. Since the packaging container according to the present invention has good appearance and sales promotion property, it can be suitably used for gifts.

[0015]

[Function] By storing fresh shiitake mushrooms in a cup-shaped container and sealing the whole with a freshness-retaining film, deformation and damage of the contents due to external pressure is eliminated, and small holes and top openings provided in the container are eliminated. The gap between each hole and opening and the sealed freshness-preserving film improves the convection of air in the container, eliminating partial stuffiness and drying, and suppressing the generation of aerial mycelia. The freshness was maintained. Also, due to the opening provided at the top of the container,
You can now easily check the condition of the contents.

[0016]

【Example】

Example 1 As an example of a paper container for containing 10 fresh shiitake mushrooms, cup base paper 350 g / m ² + PE ²⁰ μm is used, and four-color printing and transparent overprint for water resistance by flexographic printing on the cup base paper surface. Was applied. The dimensions of the cup are
The inner diameter of the upper part was 120 mm, the inner diameter of the bottom paper part was 100 mm, the depth of the fresh shiitake mushroom storage part was 75 mm, and the thread tail was 10 mm. The bottom paper was cup base paper 290 g / m ² + PE ²⁰ μm. The diameter of the body
6 small 7mm holes and also 7mm in diameter at the bottom
There are 5 small holes. The cup lid was made of the same material as the cup body, and was provided with a circular opening with a diameter of 70 mm at the center of the lid. A polystyrene film was used as the freshness-keeping film, and the film was hermetically sealed by pillow packaging. Example 2 As shown in FIG. 3 (a), a cup-shaped container was prepared by injection molding using a polypropylene-colored (color brown) resin. The shape of the container was elliptical as shown in FIG. Sections (c) and (d) of the container body and the lid are respectively shown, and a vent hole 6 is provided on the side surface and the bottom portion of the container body. The inner diameter of the mouth of the ellipse was 300 mm in the long side (285 mm in the bottom plate), 200 mm in the short side (185 mm in the bottom plate), and the height of the part for storing the fresh shiitake mushroom was 80 μm. Also, the raising margin of the bottom surface corresponding to the thread tail of the paper cup was set to 10 mm. Also, 6 small holes of 10 mmφ were provided on each of the side surface and the bottom plate portion. The number of raw shiitake mushrooms to be stored in this container was designed as a standard size of about 20 pieces. The lid was made by a vacuum forming method using a transparent sheet of polystyrene having a thickness of 250 μm. As a film having a function of maintaining freshness, a film made of a styrene-butadiene copolymer mainly containing styrene was used, and the film was stretch-wrapped and hermetically sealed. In this example, a carry net as shown in FIG. 4 was prepared for a gift or a takeout when picking mushrooms.

[0017]

EFFECTS OF THE INVENTION By using the container for live shiitake mushrooms of the present invention, the fragile raw shiitake mushrooms are kept from being damaged or deformed in shape, and the deterioration thereof due to drying, rotting, etc., that is,
The freshness can be maintained, and the condition of these fresh shiitake mushrooms can be visually confirmed from the opening provided on the top of the container without opening the package. The container for fresh shiitake mushrooms of the present invention is for gifts,
Alternatively, it can be suitably used for applications such as mushroom picking.

[Brief description of drawings]

FIG. 1 is an explanatory view of a container for live shiitake mushrooms according to the present invention.

FIG. 2 is a cross-sectional view of the paper cup of the present invention in a packaged state.

FIG. 3 is an explanatory view showing another embodiment of the present invention.

FIG. 4 is an explanatory diagram of a net carrier for carrying.

FIG. 5 is a cross-sectional view showing an example of packaging raw shiitake mushrooms according to a conventional technique.

[Explanation of symbols]

 1. Container body 2. Lid 3. Bottom 4. Freshness preservation film 5. Raw shiitake mushroom 6. Hole punching 7. Opening 8. Body cup part of paper cup 9. Net carrier

Claims (3)

[Claims] 1. After storing fresh shiitake mushrooms in a cup-shaped container, 23
Oxygen permeability at ℃ 3,000〜30,000cc / m ² · 24h
Water vapor permeability of 20 at 40 ° C and 90% RH at rs ・ atm
The container for live shiitake mushrooms according to claim 1, wherein the whole is hermetically packaged with a film of 300 g / m ² · atm. 2. The container for live shiitake mushrooms according to claim 1, wherein a cup-shaped container having at least one small hole having a diameter of 2 to 20 mm provided in the body portion, the bottom portion, or both is used. 3. The container for live shiitake mushrooms according to claim 1, wherein the cup-shaped container is formed of paper or a composite material containing paper as a main material.