JPS61152559A - Packaging bag for cereal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a packaging bag for grains, and is particularly characterized in that it is formed by connecting a gas reservoir chamber to an airtight packaging bag.

Grains such as rice and wheat rarely rot or ripen during storage, and there are very few changes in appearance, but in reality, they do not deteriorate during storage.

When stored, the quality deteriorates and the taste deteriorates in a relatively short period of time, and when stored for a long period of time, it is treated with deworming, which causes a significant drop in quality. It is.

The main causes of grain deterioration and deterioration are oxidation due to oxygen in the air and the occurrence of parasites such as grain insects, so if grains are sealed in airtight packaging bags, deterioration and deterioration can be prevented for a considerable period of time. Moreover, if the air inside the bag is replaced with inert gas, it can be stored for an even longer period of time.

For this reason, attempts have been made in the past to seal grains such as rice in airtight packaging bags.

However, although the desired effect was achieved in preventing deterioration and deterioration of rice etc., it could not be put into practical use due to the poor handling of each bag. In other words, when enclosing rice, etc. in a packaging bag, the filling amount is slightly less than the maximum capacity of the packaging bag, so that the bag is apparently flexible and deforms slightly when external force is applied, for example, when stacked. The contact areas of the upper and lower bags are in close contact with each other.

Furthermore, the contents fill the entire bag uniformly, so that the bag maintains a constant flat shape.

In this case, it is important that the amount of gas sealed in the packaging bag is sufficient to fill the gaps that occur between the particles of the contents. When it occurs.

The bags apparently become extremely flexible, and the contents become unevenly distributed, causing the bags to lose their shape, making stacking and other handling operations impossible.Also, the amount of gas is small, causing the inside of the bag to become depressurized. When this happens, the contents are compressed by the packaging bag.

Because the bags become hard irregular blocks, they cannot be stacked, and if they come into contact with another object during handling, the force is applied only to the part of the bag that made contact, making that part of the bag extremely susceptible to tearing.

By the way, the reason why it has not been possible to control the amount of gas in one bag in the past is because carbon dioxide gas and nitrogen gas are absorbed by rice and the like.

That is, when a bag is filled with carbon dioxide gas, a very large amount of carbon dioxide gas is adsorbed by rice or the like, so that the internal pressure of the bag gradually decreases during storage, and eventually becomes a vacuum state. As a result, the bags become extremely hard blocks that cannot be transshipped or otherwise handled.

Nitrogen gas is also adsorbed by rice, etc., but the amount of adsorption is much smaller than that of carbon dioxide gas, and once nitrogen gas is adsorbed, it is released again when an external force is applied to the bag and it is shaken. It has a nature. Therefore, the nitrogen gas in one bag gradually decreases during storage, and increases again when operations such as transshipment and transportation are performed. The amount of nitrogen gas adsorbed on rice, etc. is much smaller than that of carbon dioxide gas, so it is better as an inert gas than carbon dioxide gas, but a considerable amount is adsorbed, so the initial amount of gas to be filled must be adjusted appropriately. If you do so, the inside of the bag will be under reduced pressure during storage, which will cause problems when handling it next time. The amount of gas becomes too large, causing problems.

In view of this, conventional methods have been used in which a slit is formed at one end of an airtight packaging bag, and the inside of the bag is made conductive to the outside air at this point to adjust the amount of gas within one bag. Of course, using this method, the packaging bag has a higher shelf life than breathable bags such as jute bags or paper bags, but it is not a completely airtight bag and the air inside it moves in and out as the temperature rises and falls, so it cannot be stored for a long time. It cannot be used for storage.

The present invention has been made in view of the above points, and includes a gas reservoir integrally connected to an airtight packaging bag, and a gas conduction path formed between the two. The amount of gas inside the packaging bag is controlled in the same way as when the packaging bag is a breathable bag by allowing gas to flow freely, thereby improving the handling of the bag and improving the storage stability of grains. It is an enhanced version of

Hereinafter, the present invention will be specifically explained based on illustrated embodiments.

In the figure, numeral 1 is a packaging bag, and 2 is a gas reservoir.

The packaging bag 1 is similar to this type of airtight packaging bag for grains, and is formed using an air-impermeable film, and the gas reservoir 2 is also formed using an air-impermeable film. The two are integrally connected and formed, and a conductive path 3 is provided at the connecting portion to conduct the two.

There are no particular limitations on the method of forming the packaging bag 1 and the gas reservoir 2 and the method of connecting the two.

The point is that the gas reservoir 2 has a sufficient internal volume to adjust the amount of gas in the packaging bag 1, and is located in a position that does not cause any trouble when handling the packaging bag 1. It is sufficient if the bag 1 can be handled like a normal bag.

- As an example, as shown in Fig. 2, two non-air permeable films 4 are overlapped and their outer edges are pasted together to form a large bag, which is then pasted along line A, and then packaged. It is divided into bag 1 and gas reservoir 2. Then, when bonding the A wire, a part is left unattached and this is used as the conduction path 3.

As described in detail above, the present invention is formed by connecting a gas reservoir 2 to an airtight packaging bag 1 so that the two are electrically connected.
When enclosing grains in this packaging bag, as in the normal case,
A packaging bag 1 is filled with a predetermined amount of grain and, if necessary, inert gas. In this case, there is no need to accurately measure the amount of air or inert gas sealed in the packaging bag with the grain; it is sufficient to fill in a slightly larger amount than the appropriate amount, including the amount of gas adsorbed by the grain. It is. That is, in this way, excess gas in the packaging bag 1 moves to the gas reservoir 2 and is stored there, and when the amount of gas in the packaging bag 1 decreases, the gas in the gas reservoir 2 is transferred to the packaging bag 1. to move to. the result,
Since the amount of gas inside the packaging bag 1 is always maintained at an appropriate level as in the case of a breathable bag, it is possible to transport and handle the bag, and thus grains can be stored.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing one embodiment of the present invention, and FIG.
The figure is a perspective view showing the state before bag making. 1; Packaging bag 2; Gas reservoir

Claims (1)

[Scope of Claims] An airtight gas reservoir is integrally connected to an airtight packaging bag formed using an air-impermeable film, and a gas conduction path is formed between the two. Characteristic grain packaging bags.