JP2024056968A - Shrink-wrapped - Google Patents

Abstract

The present invention provides a shrink-packaged body formed by shrink-packaging a storage container, which prevents a first shrink film from being torn and prevents dust and germs from entering the inside through fine pores.
[Solution] The shrink package 1 is configured to include a storage container group 10 consisting of multiple storage containers stacked one on top of the other, a first shrink film 20 that encases the storage container group 10, and a sheet member 30 that is laminated to an opening covering portion 23 that covers the opening of the uppermost storage container. The first shrink film 20 is thicker in the opening covering portion 23 by the amount of the sheet member 30 laminated thereon, improving its strength and suppressing tearing. In the opening covering portion 23, micropores for venting air formed in the first shrink film are blocked by the laminate of the sheet member 30, preventing dust, germs, and the like from entering the interior of the storage container through the micropores.
[Selected Figure] Figure 1

Description

The present invention relates to a shrink package formed by packaging a storage container with a first shrink film.

A type of food storage container commonly known as a side dish case is known. Such side dish cases are widely used not only for commercial purposes by food manufacturers but also for home use.

The side dish case is formed by pressing a sheet of paper, resin film, aluminum foil, or the like, and has a bottom wall and a peripheral wall that extends upward from the bottom wall, and is open upward.
The peripheral wall has numerous pleats formed due to the manufacturing process.
Such household side dish cases are sold on the market in a packaged state, stacked together in order to prevent dust, germs, and the like from adhering to the side dish cases during distribution, including truck transport, and when sold at retail stores.
For example, Patent Document 1 discloses packaging stacked side dish cases in a plastic packaging cup with a lid.

In recent years, in consideration of the burden on the environment, attempts have been made to reduce the use of plastic materials as much as possible. As part of these attempts, it has been proposed to wrap stacked side dish cases in a first shrink film using shrink packaging technology, as in Patent Document 2.
In this way, by changing the packaging material from a plastic cup to the first shrink film, it is possible to reduce the amount of plastic material used.

JP 2012-136282 A JP 2005-335764 A

However, since the first shrink film has a small thickness, its strength is not high.
In addition, in the case of a storage container that opens upward, such as a side dish case, when shrink-wrapped, the film adheres almost completely to the outer surface from the bottom wall to the peripheral wall, but a large space is created between the film covering the opening and the inner surface of the bottom wall of the storage container. In this way, when the part of the first shrink film covering the opening of the storage container is raised, it can be said that it is particularly prone to tearing, compared to the part that adheres to the outer surface of the storage container.
Specifically, there is a concern that the packaging may be torn if shrink-wrapped products are stacked on top of each other during transportation, or if the film covering the opening is accidentally pressed with a finger when the products are displayed in stores.

In addition, when carrying out the shrink packaging process, it is essential to provide minute holes for venting air over almost the entire surface of the film in order to allow the internal air to escape and adhere the first shrink film to the outer surface of the storage container.
However, when such fine holes are formed, there is a risk that dust and germs may enter the inside of the container through the fine holes in the part of the film covering the opening during transportation or display, which is unhygienic.

Therefore, the problem to be solved by the present invention is to prevent the first shrink film covering the opening of a storage container such as a side dish case from tearing in a shrink-packaged body formed by shrink-packaging the storage container, and to prevent dust and germs from entering the inside of the storage container through the fine pores in the first shrink film.

In order to solve the above-mentioned problems, the shrink packaging of the invention is configured to comprise a storage container, such as a side dish case, which has a bottom and sides rising from the bottom and opens upward, a first shrink film that encases the storage container, and a sheet member that is laminated to an opening covering portion of the first shrink film that covers the opening of the storage container.
In addition, the shrink packaging body of the invention is configured to include a group of storage containers consisting of multiple storage containers stacked one on top of the other, each of which has a bottom and sides rising from the bottom and opens upward, a first shrink film that encases the group of storage containers, and a sheet member laminated to an opening covering portion of the first shrink film that covers the opening of the storage container that is located at the top of the group of storage containers.

When the shrink packaging body of the invention is constructed as described above, the thickness of the packaging material of the first shrink film is increased by the amount of the sheet member laminated at the opening covering portion, thereby improving strength and suppressing tearing of the film at the opening covering portion.
In addition, in the opening covering portion, the microscopic holes for exhaust formed in the first shrink film are blocked by laminating the sheet material, thereby preventing dust, germs, etc. from entering the storage container through the microscopic holes from the opening, thereby improving hygiene.

In the shrink package according to the present invention, it is preferable that the sheet member has a size in the range of 70% to 90% of the maximum opening area of the opening of the storage container.
Furthermore, when the sides of the storage container extend upward from the bottom, it is preferable that the sheet member has approximately the same shape as the bottom of the storage container, and that a gap of approximately constant width is formed between the opening edge of the storage container and the outer edge of the sheet member.

In the shrink-wrapped product according to the present invention, the thickness of the sheet member is 25 μm to 110
It is preferable to adopt a configuration in which the ratio of the thickness of the sheet member to the thickness of the first shrink film is 3 to 14.
It is also preferable that the first shrink film is made of at least one of polyethylene-based resin, polystyrene-based resin, or polypropylene-based resin, and the sheet member is made of at least one of paper, biodegradable resin, polyethylene-based resin, polystyrene-based resin, or polypropylene-based resin.
In the shrink packaging of the invention, the sheet member may also be laminated to a side covering portion covering the side portion of the storage container of the first shrink film or a bottom covering portion covering the bottom.

In the shrink package of the invention, the first shrink film has micropores, and the package further includes a second shrink film that does not have micropores and is partially covered over the first shrink film, and the second shrink film can be configured to block the micropores of the first shrink film.
In this case, it is preferable that the second shrink film has a cylindrical shape and is configured to cover the entire side of the storage container or group of storage containers from above the first shrink film.

By constructing the shrink packaging body in the manner described above, it is possible to prevent the first shrink film covering the opening of the container from tearing, and also to prevent dust and germs from entering the inside of the storage container through the fine pores in the first shrink film.

FIG. 1 is a perspective view of a shrink-wrapped product according to a first embodiment; A perspective view of the storage container group FIG. 2 is a side view of a shrink-wrapped body before the sheet members are laminated; FIG. 1 is a perspective view of a shrink-wrapped body before the sheet members are laminated; FIG. 13 is a perspective view of a shrink-wrapped body according to a second embodiment; FIG. 13 is a perspective view of a shrink-wrapped body according to a third embodiment; FIG. 13 is a perspective view of a shrink-wrapped body according to a fourth embodiment; FIG. 13 is a perspective view of a shrink-wrapped body according to a fifth embodiment; FIG. 13 is a perspective view of a shrink-wrapped body according to a sixth embodiment; FIG. 13 is a perspective view of a shrink-wrapped body according to a seventh embodiment; FIG. 13 is a perspective view of a shrink-wrapped body according to an eighth embodiment;

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The shrink package 1 of the first embodiment shown in Figures 1 to 4 comprises a group of storage containers 10 as the object to be packaged, a first shrink film 20 that envelops the group of storage containers 10 with shrink packaging, and a sheet member 30 laminated at a specific position on the outer surface of the first shrink film.
The shrink-wrapped body 1 is distributed in the market in this state, and at the purchaser, the first shrink film 20 is broken and the overlapping storage containers 11 are individually removed from the storage container group 10.
It is used for storage.

As shown in Fig. 2, the storage container group 10 is made up of a plurality of storage containers 11 stacked vertically. Each storage container 11 has a bottom wall 11a and a side wall 11b rising from the bottom wall 11a, and has an opening 11c at the top. The overlapping storage containers 11 are arranged such that the bottom wall 11a and the side wall 11b are spaced apart from each other.
, the side walls 11b are in contact with each other.
The type of storage container 11 is not particularly limited, but an example is a side dish case made of a sheet of paper or the like and widely used for storing food such as side dishes for lunch boxes.

The storage container 11 shown in FIG. 2 is such a side dish case, and is made of a flat sheet body (
It is produced by press-molding a sheet (blank) into the desired shape using a press molding device.
The side dish case serving as the storage container 11 has a bottom wall 11a which is circular in plan view and a side wall 11b which widens and rises from the bottom wall 11a, and vertical striped pleats 11d resulting from the press molding method are formed over almost the entire side wall 11b.
Here, the sheet body for manufacturing the side dish case serving as the storage container 11 is not particularly limited, but examples thereof include paper, a resin film, aluminum foil, or a composite substrate made by bonding these together.
In addition, when manufacturing the side dish case as the storage container 11 by press molding,
A number of blanks are stacked and fed to a press molding device, and pressed to produce multiple overlapping blanks at the same time. These can also be used as a storage container group 10 as they are.

In Figure 2, the storage container 11 is shown with the bottom wall 11a having a circular shape in a planar view, but the shape is not limited to this, and the bottom wall 11a may be elliptical in a planar view, or may be polygonal, such as triangular or rectangular.
The number of storage containers 11 in the storage container group 10 and the dimensions of each storage container 11 are not particularly limited.

As shown in Figures 1, 3 and 4, the first shrink film 20 that encases the storage container group 10 consists of a bottom covering portion 21 that adheres to the outer surface of the bottom wall 11a of the storage container 11 that constitutes the lowest level of the storage container group 10, a side covering portion 22 that adheres to the outer edges of the side walls 11b of the storage containers 11 that are arranged in parallel above and below, and an opening covering portion 23 that covers the opening 11c of the uppermost storage container 11.
The first shrink film 20 encases the storage container group 10 using a general shrink packaging technique, and has micropores (not shown) formed on almost the entire surface to allow air inside the package to escape to the outside when the package shrinks. The area and position of the micropores are not limited to the above, and they can be formed locally as long as the air can be smoothly escaped to the outside. The number of micropores is also not important.
3 and 4 , film welding lines 24 resulting from the manufacturing process are formed in the opening covering portion 23 and the side covering portion 22 of the first shrink film 20. The film welding lines 24 cross the opening covering portion 23, and both ends thereof terminate halfway up and down in the side covering portion 22.

The type of the first shrink film is not particularly limited, but examples of films commonly used for shrink packaging include films of polyethylene resin, polystyrene resin, or polypropylene resin. A biaxially stretched shrink film is used.
The thickness of the first shrink film is preferably 7.5 μm to 30 μm, and more preferably 15 μm or less.
If the thickness of the first shrink film is less than 7.5 μm, the strength is insufficient and the film is easily torn during transportation of the shrink-wrapped product 1. If the thickness of the first shrink film is less than 3 μm, the film is easily torn during transportation of the shrink-wrapped product 1.
If the thickness exceeds 0 μm, the amount of plastic material used will be excessive, which will increase the burden on the environment, and the stiffness of the film will increase, preventing it from adhering to the container 11 .

As shown in FIGS. 1 and 4 , the sheet member 30 is laminated on the outer surface of the entire first shrink film 20 from the opening covering portion 23 to the side covering portion 22 .
The sheet member 30 includes a circular opening laminated portion 31 laminated on the opening covering portion 23 and a side covering portion 2
The sheet member 30 is made up of a pair of square side laminated portions 32 laminated to the opening laminated portion 31 and a strip-shaped connecting portion 33 connecting each side laminated portion 32 to the opening laminated portion 31. The film welding lines 24 of the first shrink film are concealed by this sheet member 30.
By laminating the sheet member 30, the opening covering portion 23 of the first shrink film 20, which is prone to tearing, can be reinforced, thereby preventing tearing at that portion and also blocking the fine pores at that portion, thereby preventing the intrusion of dust and other particles into the interior of the storage container 11.
In addition, since the film welding lines 24 of the first shrink film 20 can be concealed by laminating the sheet member 30, the film welding lines 24 are not visible on the outer surface of the shrink packaging body 1, which improves the appearance, and since the film welding lines 24 do not come into direct contact with fingers, the feel is also improved.

The manner in which the sheet member 30 is laminated to the first shrink film 20 is not particularly limited, and examples of the laminate include lamination and welding. The type of adhesive or pressure-sensitive adhesive used when laminating the sheet member 30 to the first shrink film is also not particularly limited, and examples of the adhesive include a solvent-based acrylic adhesive that has higher adhesion than a water-soluble adhesive.
1, the sheet member 30 is laminated on the outer surface from the opening covering portion 23 to the side covering portion 22, but it may be laminated on the inner surface thereof. When laminated on the inner surface, the step between the first shrink film 20 and the sheet member 30 does not appear on the outer surface of the shrink package 1, so that the feel is pleasant.
The lamination step of the sheet member 30 may be performed either before or after the shrink packaging step of the storage container group 10 with the first shrink film 20, but lamination after the shrink packaging step allows the air venting effect of the fine holes provided in the film to be fully exhibited.
The stacking will take place before the shrink wrapping process.

The material of such sheet member 30 is not limited, but examples thereof include paper, resin film, and metal foil.
Examples of resin films as the sheet member 30 include biodegradable resin films, polyethylene-based resin films, polystyrene-based resin films, polypropylene-based resin films, and synthetic paper made primarily from polypropylene resin (Yupo (registered trademark)).
Examples of the metal foil used as the sheet member 30 include aluminum foil and copper foil. Furthermore, the sheet member 30 may be a combination of these materials, for example, by laminating a plurality of layers.

The sheet member 30 may be either transparent or opaque. If it is transparent, it becomes easy to visually check the inside of the storage container 11 when purchasing the shrink-wrapped body 1, and if it is opaque, it can easily be used as a label on which package markings, bar codes, etc. are printed.
In FIG. 1, the sheet member 30 also serves as a label, and has a package indication 35 printed thereon.
The sheet member 30 may be partially transparent and the remaining portion may be opaque, so that the inside of the storage container 11 can be seen through the transparent portion, and package markings or the like can be printed on the opaque portion.

The thickness of the sheet member 30 varies depending on the material, but it is sufficient that the thickness exhibits sufficient strength to prevent tearing of the first shrink film 20, and is within the range of 25 μm to 110 μm, and more preferably within the range of 40 μm to 100 μm.
If the thickness of the sheet member 30 is less than 25 μm, the effect of reinforcing the first shrink film 20 becomes insufficient, and the opening covering portion 23 may be torn or the film welding line 24 may become weak.
If the thickness of the sheet member 30 exceeds 110 μm, the material will be excessive, resulting in high costs.
As the material for the sheet member 30, CPP, synthetic paper, C-PET, etc. are particularly preferable since they have the characteristics of being difficult to stretch and the film is difficult to tear.
Furthermore, when the ratio D/d of the thickness D (μm) of the sheet member 30 to the thickness d (μm) of the first shrink film 20 satisfies 3 to 14, tearing of the first shrink film 20 can be effectively prevented. When the ratio D/d is less than 3, the sheet member 30 may not be thick enough to prevent tearing of the first shrink film 20. When the ratio D/d exceeds 14, the sheet member 30 becomes too thick relative to the first shrink film 20, resulting in reduced flexibility and reduced ability to conform to the first shrink film when laminated thereon,
Sometimes it doesn't stack properly.

The shape of the sheet member 30 is a composite shape of a circular opening laminated portion 31, a square side laminated portion 32, and a band-shaped connecting portion 33 in FIG. 1 and FIG. 4, but is not particularly limited thereto.
There are no particular limitations on the shape of the cover 23 as long as it can be laminated on the outer surface of the opening covering portion 23 of the shrink film 20 and can conceal the film welding line 24 at that location.
Other examples of the shape of the sheet member 30 include a circle, an ellipse, and a polygon such as a triangle or a rectangle.
The dimensions of the sheet member 30 are not particularly limited, but it is preferable that the size be 70% to 90% of the maximum opening area of the opening 11 c of the storage container 11 .
If the dimensions of the sheet member 30 are less than 70% of the maximum opening area of the opening 11c of the storage container 11, the film welding line 24 may not be sufficiently concealed or the opening covering portion 23 may not be covered.
There is a risk that the reinforcement will be insufficient.
In addition, when the sheet member 30 is opaque, its dimensions are smaller than the opening 11c of the storage container 11.
When the size of the opening 11c exceeds 90% of the maximum opening area, the outer edge of the opening 11c and the sheet member 30
Since there is almost no gap between the outer edge of the storage container 11 and the shrink-wrapped body 1, it is difficult to visually check the inside of the storage container 11 when the shrink-wrapped body 1 is in a wrapped state.
When the numerical range is 90% or less, if a design is printed on the bottom inner surface and the side inner surface of the storage container 11, the gap between the outer edge of the opening 11c and the outer edge of the sheet member 30 may cause the following:
By visually checking this, the design of the package can be fully utilized. When small portions of frozen or refrigerated food are stored inside the container and then shrink-wrapped, the food can be identified through the gap.

In this embodiment, it is preferable that the shape of the bottom wall 11a of the storage container 11, which is circular in plan view, and the shape of the portion covering the bottom wall 11a of the storage container 11 and the opening 11c of the sheet member 30, such as the opening stacking portion 31 of the sheet member 30, are approximately the same.
In this way, the shape of the opening 11c of the storage container 11 and the shape of the opening laminated portion 31 of the sheet member 30 are substantially similar to each other, so that the width of the annular gap formed between the outer edge of the opening 11c and the outer edge of the opening laminated portion 31 is substantially constant.
When the first shrink film 20 is pressed by a finger, the force acting on the first shrink film 20 in the annular gap is distributed approximately evenly at any point in the circumferential direction.
The tearing of the shrink film 20 is prevented from being concentrated in a certain part of the shrink film 20, and the tearing is further prevented.
Furthermore, if the shape of the opening 11c of the storage container 11 and the shape of the opening laminated portion 31 of the sheet member 30 are approximately similar, it becomes easy to conceal the film welding line 24 on the opening covering portion 23 of the first shrink film 20.

FIG. 5 shows a shrink package 2 according to a second embodiment.
In this embodiment, the sheet member 30 is a part covering the opening 2 of the first shrink film 20.
3. It consists of only a circular opening laminate portion 31 laminated to the laminated plate 3.
Even in this case, the opening covering portion 23, which is the most prone to tearing of the entire first shrink film 20, is reinforced by the sheet member 30, thereby preventing tearing, and the portion of the film welding line 24 on the opening covering portion 23, which is the most noticeable and is most likely to be touched by fingers, is concealed, thereby appropriately improving the aesthetic appearance and feel.
Since the sheet member 30 consists only of the opening laminated portion 31, the lamination work onto the first shrink film 20 is easy, and the workload and material costs can be reduced.

FIG. 6 shows a shrink-wrapped package 3 according to a third embodiment.
In this embodiment, the sheet member 30 is a part covering the opening 2 of the first shrink film 20.
3 and a square side laminated portion 32 which is laminated separately to the side covering portion 22 , and does not have a connecting portion 33 .
Since the opening laminated portion 31 and the side laminated portion 32 of the sheet member 30 are separate, they can be laminated individually to the first shrink film, facilitating the lamination operation.
Since the sharpest end of the film welding line 24 on the side covering portion 22 is concealed by the side laminated portion 32, the aesthetic appearance and feel are improved.

FIG. 7 shows a shrink package 4 according to a fourth embodiment.
In this embodiment, the circular bottom lamination portion 34 of the sheet member 30 is laminated to the bottom covering portion 21 of the first shrink film 20. Although not shown, similarly to the second embodiment,
The sheet member 30 is also laminated onto the opening covering portion 23 of the first shrink film 20 .
This reinforces the bottom covering portion 21, which is easily worn during transportation, and prevents the first shrink film 20 from tearing from the bottom.
In this embodiment, the film welding line 24 is formed on the first shrink film 20.
The film welding line 24 of the bottom covering portion 21, which is part of the side covering portion, is concealed by the bottom laminated portion 34, thereby appropriately improving the appearance and feel.

FIG. 8 shows a shrink-wrapped product 5 according to a fifth embodiment.
In this embodiment, the storage container 11 has a bottom wall 11a that is rectangular with rounded corners, and the side wall 11b that extends upward from the bottom wall 11a has folds 11d formed only at the locations that correspond to the corners of the bottom wall 11a.
The sheet member 30 is laminated only on the opening covering portion 23 of the first shrink film 20 , and its shape is a rounded rectangle that is substantially the same as the bottom wall 11 a of the storage container 11 .

FIG. 9 shows a shrink package 6 according to a sixth embodiment.
In this example, a window 25 is automatically formed in the first shrink film 20 by peeling off the sheet member 30 consisting only of a circular opening laminate portion 31 from the first shrink film 20 .
Therefore, when using the storage container 11, the packaging can be easily opened by inserting fingers into the window 25 and tearing the film.
The manner in which the window 25 is formed is not particularly limited, but examples include a method in which a slit is pre-made in the portion of the first shrink film 20 where the sheet member is laminated, or a method in which fine holes in the portion of the sheet member where the sheet member is laminated are adjusted so as to be arranged in a perforation pattern so that the window 25 breaks when the sheet member 30 is peeled off.

FIG. 10 shows a shrink package 7 according to a seventh embodiment, and FIG. 11 shows a shrink package 8 according to an eighth embodiment.
In the shrink-wrapped product 7, the storage container 11 has a bottom wall 11a that is circular in plan view, and the side walls 11b that extend from the bottom wall 11a are formed with pleats 11d over almost the entire area. In the shrink-wrapped product 8, the storage container 11 has a bottom wall 11a that is rectangular with rounded corners in plan view, and the side walls 11b that extend from the bottom wall 11a are formed with pleats 11d over almost the entire area.
The bottom wall 11a has folds 11d formed only at locations corresponding to the corners.
In these examples, the second shrink film 40 having a cylindrical shape is applied to cover the entire periphery of the side covering portion 22 of the first shrink film 20 .
The second shrink film 40 is formed by using a general shrink packaging technique.
The shrink film 20 is shrunk so as to be in close contact with the outer surface of the shrink film 20.
Since the second shrink film 40 has openings at the top and bottom, it is not necessary to provide fine holes for allowing air to escape to the outside. Therefore, unlike the first shrink film 20, the second shrink film 40 does not have fine holes.

The second shrink film 40 covers the side covering portion 22 of the first shrink film 20.
Since the first shrink film 20 is covered and protected, tearing of the first shrink film 20 is suppressed.
The second shrink film 40 covers the side covering portion 22 of the first shrink film 20.
The micropores formed on the first shrink film 20 are closed. This makes it possible to prevent the intrusion of dust and the like into the storage container 11. If the micropores of the first shrink film 20 are provided locally only in the side covering portion 22, almost all of the micropores can be blocked by the second shrink film 4.
Since it can be closed at 0, it is possible to take every possible measure to prevent the intrusion of dust and other particles.
In addition, the film welding lines 24 appearing on the side covering parts 22 of the first shrink film 20 are concealed by the second shrink film 40. Therefore, the film welding lines 24 do not come into direct contact with fingers, improving the feel to the touch.

The second shrink film 40 may be either transparent or opaque. If it is transparent, it becomes easy to see the inside of the storage container 11 when purchasing the shrink-wrapped bodies 7 and 8, and if it is opaque, it can function as a label on which package indications, bar codes, etc. are printed.
10 and 11, the second shrink film 40 functions as a label and is printed with a package marking 41. In this case, the package marking 41 makes it difficult to visually recognize the film welding line 24, which improves the appearance.

The type of the second shrink film is not particularly limited, but examples of films used in general shrink packaging include polyethylene terephthalate resin, polyolefin resin, polyvinyl chloride resin, polyethylene resin, polystyrene resin, and polypropylene resin. A uniaxially stretched shrink film is used, and a so-called uniaxially semi-stretched shrink film that also shrinks slightly in two axial directions can also be used. By making the material of the first shrink film stronger than the material of the second shrink film, damage to the shrink packages 7 and 8, film tearing, etc. can be suppressed. As such an example, when the first shrink film is a polyethylene resin, a polyethylene terephthalate resin is used as the second shrink film.

The thickness of the second shrink film is preferably 7.5 μm to 60 μm, and more preferably 15 μm or less.
It is more preferable that the thickness of the second shrink film is 100 μm to 40 μm. By making the thickness of the second shrink film thicker than that of the first shrink film, damage to the shrink packages 7 and 8, film tearing, etc. can be suppressed. Note that as the thickness increases, the rigidity of the film increases and the adhesion decreases, but since the entire shrink packages 7 and 8 are already covered by the first shrink film, the second shrink film does not require high adhesion.

The embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, and includes all modifications and variations within the scope of the claims and the meaning equivalent thereto.

For example, in the embodiment, the shrink-wrapped object 1 is packed in a plurality of storage containers 11.
However, it may be a single storage container 11.
The shape of the storage container 11 is not limited to that of the embodiment as long as it has a bottom and sides and opens upward. For example, the storage container 11 may have a bowl-like shape in which the bottom wall 11a and the side wall 11b are not clearly defined, as in the embodiment.
In the embodiment, the shrink package 1 includes a storage container group 10, a first shrink film 2
0 and the sheet member 30 are the only components, but in addition, for example, a storage container 11
Food and other items stored in small portions may also be included as components.
In addition, in the embodiment, the sheet member 30 is laminated so as to hide the film welding line 24 of the first shrink film 20, but the lamination position of the sheet member 30 does not have to coincide with the film welding line 24.

In the embodiment, the second shrink film 40 has a cylindrical shape, but is not limited to this, and it is sufficient that the second shrink film 40 covers at least a portion of the first shrink film 20 and is in close contact with the first shrink film 20 .
In addition, in the embodiment, the cylindrical second shrink film 40 is applied only to the side covering portion 22 of the first shrink film 20, but by increasing the axial length of the tube, it may also be made to cover the outer edges of the bottom covering portion 21 and the opening covering portion 23 when shrinking.
The second shrink film 40 and the sheet member 30 may overlap each other partially or entirely.
When the two sheets are overlapped, the sheet member 30 is placed on the inside, and the second shrink film 40 is placed on the inside.
When the second shrink film 40 is placed on the outside, the second shrink film 40 can protect the sheet member 30 from damage, etc. In this case, before the shrinking process of the second shrink film 40 is performed, the first shrink film 20 is heated and softened and is then placed on the sheet member 3.
Since the film welding line 24 is to be attached by a bonding operation using the sheet member 30, it is possible to press and deform the film member 30 from above so as to reduce the sharpness of the film welding line 24 and improve the feel of the film member 30, which is also preferable in that sense.
In the embodiment, the package marking 41 is provided on the second shrink film 40.
Instead, between the first shrink film 20 and the second shrink film 40,
It is also possible to clamp and fix a separate label or the like.

DESCRIPTION OF EMBODIMENTS 1 to 8 Shrink-wrapped body 10 of each embodiment Storage container group 11 Storage container 11a Bottom wall 11b Side wall 11c Opening 11d Pleats 20 First shrink film 21 Bottom covering portion 22 Side covering portion 23 Opening covering portion 24 Film welding line 25 Window 30 Sheet member 31 Opening laminated portion 32 Side laminated portion 33 Connection portion 34 Bottom laminated portion 35 Package marking 40 Second shrink film 41 Package marking

Claims (9)

a storage container having a bottom and a side portion rising from the bottom and opening upward;
a first shrink film that encases the container;
a sheet member laminated on an opening covering portion of the first shrink film that covers the opening of the storage container. a storage container group including a plurality of storage containers stacked vertically, each of which has a bottom and a side portion rising from the bottom and opens upward;
a first shrink film that encases the group of storage containers;
a sheet member laminated to an opening covering portion of the first shrink film that covers the opening of the uppermost storage container in the group of storage containers. The area of the sheet member is 70% to 90% of the maximum opening area of the opening of the storage container.
The shrink-wrapped product according to claim 1 or 2, The thickness of the sheet member is 25 μm to 110 μm,
4. The shrink package according to claim 1, wherein the ratio of the thickness of the sheet member to the thickness of the first shrink film is 3 to 14. The first shrink film is made of at least one of a polyethylene resin, a polystyrene resin, and a polypropylene resin,
5. The shrink package according to claim 1, wherein the sheet member is made of at least one of paper, a biodegradable resin, a polyethylene-based resin, a polystyrene-based resin, and a polypropylene-based resin. The container has sides that extend upward from the bottom,
The sheet member has substantially the same shape as the bottom of the storage container,
5. The shrink package according to claim 1, wherein a gap having a substantially constant width is formed between an opening edge of the storage container and an outer edge of the sheet member. 7. The shrink package according to claim 1, wherein the sheet member is also laminated to a side covering portion covering the side portion of the storage container or a bottom covering portion covering the bottom portion of the first shrink film. The first shrink film has micropores,
The present invention further includes a second shrink film that does not have micropores and is partially covered on the first shrink film,
The shrink package according to claim 1 , wherein the second shrink film closes micropores in the first shrink film. The second shrink film has a cylindrical shape,
9. The shrink package according to claim 8, wherein the first shrink film is placed over the entire periphery of the side of the storage container or group of storage containers.

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