JPH0459224B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for filling and sealing a container containing a self-heating material in advance for storing the contents such as a beverage.

<Prior Art> Containers capable of storing a self-heating material such as quicklime or both quicklime and water and food and drink in the same container and heating the contents by the exothermic reaction are known, and probably Close to 100 patent and utility model publications have been published.

Of these, the one actually manufactured and commercially available is the second one.
This is shown in the explanatory cross-sectional view of the figure, and the content is Japanese sake.

In FIG. 2, 1 is a container body made of a paper tube, and 2 is a metal reaction container housed within the container body, which serves as a compartment for the contents A and the self-heating material.

The inside of the reaction vessel 2 is filled with a water container 3 made of plastic film containing water and quicklime 21, both of which are self-heating materials. A lid indicated by 4 is attached to the reaction container 2,
As shown in the figure, the lid 4, the reaction container 2, and the container body 1 are integrated at the periphery by tightening.

Contents A are filled on the outside of the reaction container 2, and a pull-top metal lid 5' is attached to the container body 1.
It is sealed by wrapping it around the area.

Although not shown in the figure, a synthetic resin cap is further attached to the container body 1, and a nail-shaped jig for piercing is placed inside this cap.

In this container, a jig is used to break through the lid 4 and also break through the water container 3, thereby causing water and quicklime 21 to react, and the generated heat to heat the contents.

<Problems to be Solved by the Invention> The above-mentioned container was actually commercially available, and was excellent in that the contents could be heated in a place without fire.

However, when it was actually put on the market, it was found that there were two problems, although the number of cases was very small.

That is, the first point is that due to the steam generated from the contents heated by the reaction between quicklime and water and the expansion due to heating of the air in the head space, a gap is created in the tightened part of the lid 5', and this This causes water vapor to escape to the outside.

The second problem is that the lid 5' is a metal pull-top type lid, so even after opening, a ring-shaped metal remains around the opening, and this metal is heated, making it difficult to open the lid. Things happen that cannot be done.

<Means for Solving the Problems> The present invention solves the above-mentioned problems, and includes a sealed reaction container filled with a self-heating material that starts a reaction when punctured with a jig. In the heating container filling and sealing method, the heated contents such as beverages are filled into the container body partitioned by the reaction container after being tightened and fixed at the periphery, and then sealed with an openable lid. After heating the container to a temperature equal to or higher than that of the self-heating material and filling the container body, a flexible lid material that can be deformed by the internal pressure inside the container is used, which can absorb reduced pressure. The present invention provides a method for filling and sealing a heating container, which is characterized in that the heating container is joined to the container body and sealed in a state in which the heating container is sealed.

<Function> According to the present invention, since the contents are heated when the lid material is sealed, the inside of the container becomes depressurized when the container is cooled to room temperature. , absorb this reduced pressure.

When the contents are heated by the heat generated by the self-heating material, the internal pressure inside the container rises again, but this temperature is the same as or lower than the temperature when sealed, so the internal pressure is at most the same as the internal pressure when sealed. Therefore, this internal pressure can be absorbed by the deformation of the lid, and no air or water will leak from the sealed portion of the lid.

Further, as will be described later, no lid material remains when the lid is opened, but even if it were, the lid material is not made of metal with a small heat capacity, so it will not reach a temperature so high that it cannot be touched.

<Example> The present invention will be described below with reference to FIG. 1 of the drawings.

In FIG. 1, 1 is a container body such as a paper tube, the inner surface of which is preferably made of a heat-sealable plastic material.

A sealing member 6 made of synthetic resin is attached to the upper part of the container body 1, that is, the opening. Container body 1
When is a cylindrical paper tube, the sealing member 6 is ring-shaped, and in order to maintain liquid-tight and air-tight contact between the two, the sealing member 6 is made of the same resin as the inner surface of the container body 1. It is necessary to use resin or a resin with good sealing properties. For the same reason, it is desirable that the upper part of the container body 1 is curled outward to form a flange portion to increase the contact area between the inner resin and the sealing member 6. Adhesion between the two can be achieved by, for example, ultrasonic sealing, high frequency induction heating, or the like.

2 is a metal reaction container, and it is desirable that a layer of synthetic resin be formed on the surface in contact with the contents so that it does not react with the contents and does not impair the flavor of the contents. In addition, self-heating material 21
It is desirable that a layer of synthetic resin is also formed on the surface in contact with the metal to prevent the metal from being attacked by the self-heating material and reaction products.

A self-heating material is housed inside the reaction vessel 2, and this self-heating material consists of, for example, quicklime 21 and a water container 3 filled with water.

Note that the temperature when heating content A is determined, in principle, by the amount of self-heating material and the amount of the content, so the amounts of both should be determined experimentally to reach the desired temperature. Should.

As shown in FIG. 1, the reaction container 2 is sealed by wrapping the container body 1 and its peripheral edge.

The lid 4 of the reaction vessel 2 may have a shape as shown in FIG.

After attaching the reaction container 2, the self-heating material, and the lid 4 of the reaction container to the bottom of the container body 1 in this way, the contents A are filled and the lid material 5 is attached to the sealing member 6.
Seal and seal.

Is the temperature of the contents when sealed the same as the temperature set experimentally above due to the heat generated by the self-heating material?
It has to be higher than this. If the content is Japanese sake, it is only necessary to heat it to about the same temperature as human body temperature using a self-heating material, so it is sufficient that the temperature at the time of sealing is the same as the temperature at the time of sterilization and filling.

The position of the lid material 5 immediately after being sealed at high temperature is the first position.
Although it is in position 5 in the figure, as it is left to cool and the inside of the container becomes depressurized, it deforms to position a in the figure.

As described above, an example of the flexible lid material 5 that can be deformed due to changes in internal pressure is one in which plastic is laminated on the inner surface of aluminum foil.

Although not shown in the figure, this container includes:
It is convenient to have a plastic cap and piercing jig available. The jig may be made of heat-resistant resin.

This container, like the container shown in FIG. 2, is used by piercing the lid 4 of the reaction container 2 with a jig and breaking the water container 3, causing water and quicklime to react and generate heat.
When breaking through, turn the entire container upside down, then break through, leave it in the upright position for a few minutes, then turn it over again and place it in the upright position. This allows water to spread through the quicklime, increasing the speed and efficiency of heat generation.

The interior of the container, which has become pressurized due to the heat generated by the self-heating material, can absorb this pressurized state by returning the lid 5 to position 5 in the figure, and therefore no leakage of air or water vapor occurs. This is as stated above.

In addition, if the conventional container is not used according to the correct usage instructions and is left to generate heat with an inverted jig, internal pressure is applied to the lid 4 of the reaction container 2, but in the container of the present invention, the lid material 5 is Because it can absorb internal pressure,
Even in this case, this internal pressure is absorbed and no burden is placed on the tightened portion.

After this, the lid material 5 is attached to the sealing member 6 by the tab 51.
The container can be peeled open and the contents can be eaten or eaten. Since the lid material 5 will peel off, the opening will be attached to the synthetic resin sealing member.

<Effects of the Invention> According to the present invention, the pressurized state inside the container due to heating of the self-heating material can be absorbed by the lid member 5, so that air and water vapor do not leak. Also, when filling and sealing, if the container is completely sealed,
Although the lid member 5 is dented at the position a as it cools, it does not dent when the sealing is incomplete, so this also has the effect that the sealing state can be determined.

Furthermore, since the part to which the opening is attached is a sealing member with a large heat capacity, it will not inadvertently become hot.

[Brief explanation of drawings]

FIG. 1 is an explanatory sectional view showing an embodiment of the present invention;
FIG. 2 is an explanatory sectional view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Container body, 2... Reaction container, 3... Water container, 4... Lid of reaction container, 5... Lid material, 6... Seal member, 21... Quicklime, 51... Tab.

Claims (1)

[Scope of Claims] 1. A sealed reaction container filled with a self-heating material that starts a reaction when pierced with a jig is fixed around the periphery of the container body, and then the reaction container is partitioned by the reaction container. In a heating container filling and sealing method in which heated contents such as beverages are filled into the container body and sealed with an openable lid, the temperature of the contents is the same as that when heated by a self-heating material, or A heating container characterized in that after heating to a temperature higher than that and filling the container body, a flexible lid material that can be deformed by the internal pressure inside the container is joined to the container body in a state capable of absorbing reduced pressure and sealed. filling and sealing method. 2. The filling and sealing method according to claim 1, characterized in that a sealing member made of synthetic resin is attached to the mouth of the container body, and a lid material is sealed to this sealing member.