JPH03212337A - Packing vessel - Google Patents

Abstract

PURPOSE:To decrease the allowance space for contents as little as possible and keep the deaerated condition of a vessel and further, facilitate containing work of the contents, by sealing the opening vessel containing the contents with a film and by deforming the shape of the other part without deforming the shape near the upper face of the vessel when deaerating the inside of the vessel. CONSTITUTION:The main body of a vessel A is put loose in the hole bored on a base 10 and the vessel A is supported, contacting the base 10 at the flange 2 of the vessel A. Next, contents P measured out in a certain quantity is contained into the vessel A, and the opening of the vessel A is covered with a film 8 and further, the flange 2 and the film are heat-sealed. After the vessel A is enclosed, the air of the vessel A is deaerated from the suction opening formed in the film 8 of the vessel A to deform the other position than the flange 2. In this way, the allowance space for the contents P within the vessel A can be reduced as little as possible.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a packaging container, and more particularly to a packaging container suitable for packaging fresh foods that are stored in irregular shapes, such as mushrooms and bean sprouts. .

(Prior art) Conventionally, when packaging fresh foods such as mushrooms and bean sprouts, which are stored in amorphous shapes, a certain amount of mushrooms or bean sprouts are stored in a hard container made of synthetic resin with an open top. This is done by sealing the open top surface of the hard container with a synthetic resin film9.Also, after storing a certain amount of mushrooms, bean sprouts, etc. The open portion may also be sealed by heat sealing.

(Problems to be Solved by the Invention) Among such conventional packaging, packaging using a hard container has an open top surface, so it is easy to store mushrooms and bean sprouts in the container.

However, hard containers have a space (hereinafter sometimes referred to as play space) in which the stored items such as mushrooms and bean sprouts can be moved freely, so the stored items may become rough due to vibrations during transportation. The disadvantage is that it is easily damaged.

On the other hand, packaging using bags can minimize the amount of play space that the mushrooms and other items stored in the bag would have while being transported. damage can be avoided.

However, in packaging using bags, the mouth of the bag must be opened in some way each time a certain amount of mushrooms or other items are stored in the bag. The drawback is that the storage work is complicated and automation is difficult.

Therefore, an object of the present invention is to facilitate the storage of irregularly shaped items such as mushrooms and bean sprouts, and to minimize the amount of play space where the stored items would get rattled during transportation. The objective is to provide a packaging container that can

(Means for Solving the Problems) As a result of repeated studies to achieve the above object, the inventors have found that:
When the opening of a packaging container (hereinafter sometimes referred to as a container) containing stored items is sealed with a film-like material and the inside of the container is degassed, the shape of the vicinity of the top surface of the container is not substantially deformed. It was discovered that by changing the shape of the other parts, it is possible to reduce the play space for stored items as much as possible, maintain a deaerated state inside the container, and facilitate the work of storing stored items. , arrived at the present invention.

That is, the present invention provides a packaging container made of synthetic resin in which the open part of the top surface is sealed with a synthetic resin film, and the two sides of the packaging container that are in close contact with the synthetic resin film are sealed. When the inside of the container is degassed, the thickness is such that it does not substantially deform, and the side surface connecting the top surface and the bottom surface of the packaging container formed in a film shape is directed toward the bottom surface. The packaging container is characterized by being formed to be thin.

In addition, in the present invention having such a configuration, it is preferable that both the film-like body and the packaging container are made of polyethylene resin, so that carbon dioxide gas, steam, etc. generated by the respiration of the stored mushrooms, bean sprouts, etc. It can be discharged to the outside and allow oxygen to permeate, thereby maintaining the freshness of fresh foods and the deaerated state within the packaging container.

(Function) According to the packaging container of the present invention, since the top surface of the packaging container is always kept open, it is possible to easily store objects such as mushrooms and bean sprouts weighed in a certain amount.

In addition, after storing the stored items, by sealing the open part of the packaging container with a film-like material and deaerating the inside of the packaging container, the top surface of the container that is in close contact with the film-like material may be substantially deformed. Since other parts of the container can be deformed without changing the shape, it is possible to reduce the play space of the stored items in the container as much as possible while maintaining the close contact between the top surface of the container and the film-like body.

Therefore, it is possible to maintain a deaerated state within the container and to significantly reduce damage to stored items due to vibrations during transportation.

(Example) The present invention will be explained in more detail using the drawings.

FIG. 1 is a sectional view showing one embodiment of the present invention. 1st
The figure shows a state in which wood shimeji mushrooms (Shirotamogitake mushrooms) are stored as a stored item P in a container A.

The container A is made of high-pressure polyethylene resin, and a flange portion 2 is formed on the upper surface of the container A.

Note that the high-pressure polyethylene resin herein refers to a polyethylene resin manufactured by a high-pressure method.

A film-like body 8 made of high-pressure polyethylene resin is welded to the upper surface of the flange portion 2 to seal the open portion of the container A.

Note that the thickness of the film-like body 8 is approximately 30μ.

Further, the bottom part 6 of the container A is also formed thinly in the form of a film, and the bottom part 6 of the container A in this embodiment has approximately the same thickness as the film-like body 8 that is in close contact with the flange part 2.

The side surface portion 4 connecting the flange portion 2 and the bottom portion 6 of the container A is formed so as to become continuously thinner in the direction of the bottom surface 6.

The inside of such a container A is deaerated, and the shape of the other parts of the container A except for the flange part 2, that is, the film-like body 8, a part of the side part 4, and the bottom part 6, is deformed, and the container A part of the container A is in contact with an object P stored in the container A.

Therefore, the play space for the storage 6p in the container A can be reduced as much as possible, and as a result, it is possible to prevent the stored items P from shaking inside the container A due to vibrations etc. during transportation. It can prevent damage inside.

In addition, in this embodiment, since the container A and the film-like body 8 are made of high-pressure polyethylene resin, the storage 'P'
Carbon dioxide (CO2) generated by the respiratory action of IAP
It is possible to discharge water vapor and water vapor to the outside of the container, and to allow oxygen (02) to pass through from outside the container appropriately.

For this reason, the stored item P can continue to have a proper respiratory action, and can be kept fresh, and the container A can be kept in a deaerated state.

Furthermore, since the flange portion 2 of the container A is formed to a thickness that does not substantially deform due to degassing, it is possible to maintain close contact with the film-like body 8, and the film made of the high-pressure polyethylene resin can be maintained in close contact with the film-like body 8. Together with the characteristics of the shaped body 8, it is possible to maintain a deaerated state within the container A.

Such a container A not shown in FIG. 1 can be easily stored by the method shown in FIG. 2.

First, as shown in FIG. 2(a), the main body of the container A is loosely inserted into the hole drilled in the stand 10, and the flange part 2 of the container A is brought into contact with the stand 10 to support the container A. .

Next, as shown in FIG. 2(b), a predetermined amount of stored items P is inserted into the container A, the open part of the container A is covered with the film-like body 8, and the flange part 2 and the film-like body are connected. are adhered by heat sealing.

After the container A is sealed in this way, the air inside the container A is degassed from the suction port (not shown) formed in the container A or the film-like body 8, and other parts except the flange portion 2 are removed. By deforming the container A, the play space for the stored items P in the container A can be reduced as much as possible.

Further, as described above, the flange portion 2 of the container A is
Since it is formed thickly so as not to be effectively deformed even when the air inside the container A is removed, it is maintained in close contact with the film-like body 8, and the open portion of the container A is always maintained in an open state. This eliminates the need to widen the mouth of the bag every time you want to store items, which is the case with ordinary bags, so it is possible to automate the storage process.

Such a container A can be easily molded by the vacuum molding method shown in FIG.

In other words, as shown in FIG. 3(a), first, a pair of molds 12.1
A heated and softened sheet-like body 22 is sandwiched between the two.

In addition, among the molds 12 and 14, a space 18 surrounded by the sheet-like body 22 and the wall surface of the mold 12 is formed in the mold 12, and an air exhaust pipe 16 is opened in the wall surface of the space 18. There is.

Next, as shown in FIG. 3(b), from the air exhaust pipe 16 to the space 1
By rapidly discharging the air in the space 8 and reducing the pressure, the sheet-like body 22 is pressed against the wall surface of the space 18 to form a container.

At that time, the sheet-like body 2 pressed against the wall surface of the space 18
2, since the bottom of the container is stretched to a large extent,
It is possible to obtain a container in which the thickness of the bottom part is the thinnest among the containers, and the thickness of the side parts becomes continuously thinner toward the bottom.9 In the embodiments described above, the container A made of high-pressure polyethylene resin and the film-like body 8 are used, but a low-pressure polyethylene resin manufactured by a low-pressure method or a medium-pressure polyethylene resin manufactured by a medium-pressure method may also be used.

Further, olefin resins other than polyethylene resins, such as polypropylene resins, styrene resins, vinyl chloride resins, etc., may be used, or synthetic resins such as polyesters and polyamides may be used.

However, when the container type and the film-like body 8 are brought into close contact with each other by heat sealing, it is preferable that both the container A and the film-like body 8 are made of a synthetic resin having compatibility.

In this embodiment, fresh vegetables such as mushrooms and bean sprouts are disclosed as stored items, but it may also be fruits or industrial products.

(Effects of the Invention) According to the present invention, even if the packaging form is an amorphous object, the play space inside the container can be reduced as much as possible, and Damage to stored items can be prevented.

Furthermore, the work of storing it in a container is easy and can be automated9.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
FIG. 3 is an explanatory diagram illustrating the process of storing items in the packaging container A shown in FIG. 1, and FIG. 3 is an explanatory diagram illustrating a method of forming the packaging container A shown in FIG. In the figure, A...Packaging container, P...Stored item, 2...Flange part, 4...Side part, 6...Bottom part,
8... Film-like body, lO... stand, 12.14...
- A pair of molds, 16... Air discharge pipe, 18... Space, 22... Sheet-shaped body. 1

Claims (1)

[Scope of Claims] 1. In a synthetic resin packaging container whose top open portion is sealed with a synthetic resin film, the top surface of the packaging container that is in close contact with the synthetic resin film is sealed. When the inside of the packaging container is degassed, the thickness is such that it does not substantially deform, and the side surface connecting the top surface and the bottom surface of the packaging container formed in a film shape is the bottom surface. A packaging container characterized by being formed to become thinner in a direction. 2. The packaging container according to claim 1, wherein both the film-like body and the packaging container are made of polyethylene resin.