JPH0338145Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to a heating container using an exothermic agent such as quicklime, and is particularly applicable to soups, miso soup, milk, etc.
Liquid foods and beverages such as coffee and sake, cooked rice, vegetables such as potatoes and carrots, meat such as beef and pork, and solid or semi-solid foods and beverages such as fish and shellfish.
The present invention relates to an insulating container used as a heating container for heating canned food, bottled food, or food packed in synthetic resin or bags made of aluminum laminated with synthetic resin.

《Prior Art》 Various attempts have been made to heat various foods and drinks using the heat of the hydration reaction between quicklime and water.
An example of this is disclosed in Publication No. 54382.

However, in the heating container described in the same issue, an opening that can be opened for injecting water is provided at the top of the container, and when it is used, the opening is opened and water is injected into the quicklime, so the hydration reaction This has the disadvantage that hot steam spews out from the opening, and when used outdoors, it is necessary to carry water separately.

Therefore, as seen in, for example, Japanese Utility Model Publication No. 57-2867, a container has been proposed in which water for the hydration reaction is contained in the container and the water is broken with an opening needle.

However, the water injection means disclosed in this publication is broken by piercing the water bag with an opening needle, but according to this, the hole in the water bag that is torn has a diameter that is approximately the same as the outer diameter of the opening needle. As a result, the amount of water supplied at the beginning of the hydration reaction is insufficient, and not enough water is distributed throughout the quicklime, and a large amount of unreacted quicklime remains, making it impossible to raise the temperature of the object to be heated sufficiently.

In addition, if the amount of water supplied to quicklime per unit time is insufficient at the beginning, the quicklime that reacts near the exit of the hole in the water bag becomes slaked lime, and when the slaked lime is released from the hole, it may absorb water. The hydration reaction takes place only in a relatively narrow area around the pores, making it extremely difficult to apply this method to heating solid or semi-solid foods and drinks, which requires a large amount of heating energy.

In order to solve these conventional problems, the inventors of the present invention have developed a heating container suitable for large-scale hydration reactions, and have already proposed it in Utility Model Application No. 118819/1983.

In the heating container according to this application, a belt-shaped water bag is used as a means for injecting water into the exothermic agent, and when in use, one end of the water bag is opened and the bag is pulled out to the other end, so that the amount of water to be injected at the initial stage of the reaction of the exothermic agent can be adjusted. However, subsequent studies revealed that this heating container had the following problems.

<Problem to be solved by the invention> In other words, in the heating container of the above application, the heat insulating container for storing the exothermic agent is made of paper, plastic, etc., but when the heat generating agent is reacted, the insulating container is The problem was that the temperature rose to about 100 degrees Celsius, making it difficult to hold it in your hand.

Therefore, the inventors of the present invention experimented by making prototype insulated containers made of paper with insulating material pasted on the inside and outside, or made of Styrofoam, but although the former showed a slight decrease in the temperature of the container, it was not sufficient. Also,
In the latter case, the softening temperature of the polystyrene foam was too low to withstand use.

This idea was made in view of these circumstances, and the purpose is to provide a low-cost insulated container that transfers less reaction heat even when a large amount of exothermic agent is reacted. be.

<Means for Solving the Problems> In order to achieve the above object, this invention provides an insulated container that stores a heat generating agent inside and heats an object to be heated by a chemical reaction of the heat generated agent. It is composed of a paper base material and a synthetic resin film, and the synthetic resin film is bonded to the paper base material only at its end in the unfolded state, and is folded into the inner surface of the paper base material when the paper base material is assembled into a container. , an air layer was provided between the paper base material and the synthetic resin film.

<<Operation>> According to the insulated container having the above structure, since an air layer is provided between the paper base material and the synthetic resin film, the air layer blocks the reaction heat of the exothermic agent from being transferred to the paper base material. Therefore, the temperature rise of the paper base material is significantly reduced.

<<Embodiments>> Hereinafter, preferred embodiments of this invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an overall view of a heating container using a heat-insulating container according to this invention.

The heating container shown in the figure is roughly composed of an insulating container 20, a band-shaped water bag 22, a water-permeable bag body 28 that stores a flat water bag 24 and quicklime 26, and an inner container 30 that stores food and drinks that are heated objects. It is configured.

Flat water bag 24 housed within a water permeable bag body 28
is made of synthetic resin film, etc., and is made of quicklime 2.
It is placed above the quicklime 26, and is placed above the quicklime 26.
It may be at the center of The material of the water-permeable bag 28 may be paper, cloth, etc., which allows water to easily pass through the entire surface.
Non-woven fabric is used, but in addition to this, the quicklime 26 and the flat water bag 22 are wrapped in aluminum foil or aluminum foil with a synthetic resin film attached, and a through hole 28a is bored in at least the bottom surface to allow water to pass through. It may be made to have a characteristic, and this is illustrated in the drawings of this embodiment.

The inner container 30 is most preferably molded from a metal foil such as aluminum, but may also be a laminate of a synthetic resin film and a metal foil, or a heat-resistant synthetic resin film. In addition, in the case of a food or drink such as a Japanese lunch box in which cooked rice and vegetables are stored separately, a partition is provided to separate the cooked rice and vegetables, or the medium container 30 is divided into a plurality of parts and stored in the insulated container 20. It turns out.

As shown in FIG. 1, the lid part 20b of the heat insulating container 20 is attached to the opening of the container part 20a so as to press both ends of the band-shaped water bladder 22 hanging down from the opening end of the container part 20a. It's covered.

The container section 20a is composed of a paper base material 40 and a synthetic resin film 42, and FIG. 2 shows the assembly procedure thereof.

The paper base material 40 is made of, for example, corrugated paper, and as shown in the unfolded state in FIG. Left/right wall section 40
c, 40c', and folding tongue pieces 40d provided at both ends of the front and rear wall parts 40b, 40b', respectively, and vertical and horizontal folding lines 4 defining these parts.
0e is provided.

Front/back or left/right wall portions 40b, 40
In this embodiment, b', 40c, and 40c' are each folded twice.

On the other hand, the synthetic resin film 42 has a rectangular shape that almost covers the paper base material 40 in the unfolded state, and is made of PET resin or a synthetic resin obtained by mixing PET resin with polyethylene and polypropylene.

To assemble into a container shape, first, as shown in FIG. 2b, the front and rear walls 40b and 40 of the paper base material 40 are
After folding b' double, place the film 42 on top of it, and fold only the ends of the film 42 into the front and rear walls 4.
Adhere to the outside of 0b and 40b' with adhesive or adhesive tape.

This state is shown in FIG. 2c.

Here, the film 42 is attached to the bottom plate 40 of the paper base material 40.
Although it may be sporadically bonded to points such as a, it is not preferable to bond the entire surface because an air layer, which will be described later, will be eliminated if the bond is bonded all over the surface.

When the adhesion of the film 42 is completed, the front and rear wall portions 40b, 40b' are erected, and each folding tongue piece 40d is
bend inward and attach the tongue piece 40d to the left and right wall parts 40.
The walls 40c, 40 are sandwiched between the walls 40c and 40c'.
When c′ is folded double, the container part 2 shown in Fig. 2 d
0a is completed.

When the container part 20a is assembled in this way, the bottom plate 40a of the paper base material 40 and the front and rear wall parts 40b, 40
The inside of b' and the double folded left and right wall parts 40
A synthetic resin film 42 is interposed between c and 40c', and an air layer 44 is formed between the paper base material 40 and the film 42.

When using the heating container configured as described above, an object to be heated, such as food or drink, is placed in the inner container 30, and then a lid is placed on the inner container 30 as shown in FIG.

Next, after breaking the end of the band-shaped water bag 22, the other end is held and the water bag 22 is pulled out.

As a result, the water released into the container part 20a passes through the water-permeable bag body 28 and comes into contact with the quicklime 26, causing a hydration reaction, and this reaction heat causes the flat water bag 24 to
is melted to release water again, thereby further promoting the reaction of the quicklime 26.

The heat generated by the reaction of the quicklime 26 is transferred to the medium container 3.
0 to the object to be heated, and heats it to a predetermined temperature.

In this case, the reaction heat of the quicklime 26 is
Since the air layer 44 is provided in a, the transmission is blocked by the air layer 44, and the temperature rise of the paper base material 40 of the container portion 20a is significantly reduced.

According to actual measurements by the present inventors, the temperature of the paper base material 40 when generating heat without providing the air layer 44 is 80 -
While the temperature was 90°C, the provision of the air layer 44 lowered the temperature to 40-50°C.

Furthermore, since the decrease in the amount of heat released from the container portion 20a to the outside is reduced, the object to be heated can be heated efficiently, and by providing the air layer 44, the temperature thereof is increased by about 10°C.

Further, a synthetic resin film 4 is attached to the container portion 20a.
2 is interposed, water leakage when water is released from the water bag 22 is also prevented.

In this embodiment, the air layer 44 is provided only for the container portion 20a;
This is because the air layer 44 is not necessarily required since the temperature rise in the container part b is not as remarkable as that in the container part 20a during heating.

<<Effects of the invention>> As explained above in detail in the Examples, in the heat-insulating container according to this invention, the air layer blocks the chemical reaction heat of the exothermic agent from being transferred to the container, so the temperature of the container itself is reduced. The object to be heated can be heated efficiently while significantly reducing the rise in temperature.

Further, since the heat-insulating container is composed of a paper base material and a synthetic resin film that is folded in when the paper base material is assembled into the container, it can be manufactured at extremely low cost.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a heating container using the heat insulating container according to the present invention, and FIG. 2 is an explanatory diagram showing the assembly procedure of the heat insulating container. 20...Heating container, 26...Quicklime, 20a...
... Container part, 40 ... Paper base material, 42 ... Synthetic resin film, 44 ... Air layer.

Claims (1)

[Scope of utility model registration request] In a heat insulating container that stores a heat generating agent inside and heats an object to be heated by a chemical reaction of the heat generating agent, the heat insulating container is made of a paper base material and a synthetic resin film, and the synthetic resin film is formed by expanding the paper base material. Only the ends are glued to the paper base material in a state, and when the paper base material is assembled into a container, it is folded into the inner surface of the paper base material, and an air layer is provided between the paper base material and the synthetic resin film. Insulated container.