JPH08188771A - Instant cooling tool - Google Patents

Abstract

PURPOSE: To provide an instant-cooling tool capable of being rapidly changed into a low temperature state on use and further persisting the cooling effect for a long period. CONSTITUTION: This instant cooling tool is produced by receiving an anhydrous ammonium salt 2, perlite 3, and a bag 5 in which water 4 is sealed in a flexible bag material 1. When the instant cooling tool is used, the bag 5 is torn in the bag material 1 to contact-react the water with the anhydrous ammonium salt 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instant cooling device which can be brought into a low temperature state rapidly during use and which can maintain a long-lasting cooling effect.

[0002]

2. Description of the Related Art Conventionally known instant cooling devices generally dissolve solid salts such as sodium nitrate and ammonium nitrate in water and utilize the negative heat of solution. However, since the reaction between the solid salts and water is extremely fast, there is a problem that the recovery to room temperature is fast and the cooling effect is not sufficient. That is, it is necessary to devise a method in which the reaction is gradually performed and lasts for a long time. Therefore, the inventor of the present invention has proposed an instant cooling device having a structure in which perlite having adsorbed water and anhydrous ammonium salt are sealed in a bag in a state of being separated from each other (see “Improving Cold Cold” in Japanese Patent Publication No. 57-27146). Vessel ”). The instant cooling device of this structure mixes perlite having adsorbed water with anhydrous ammonium salt at the time of use, crushes perlite to release water, and reacts the water with the anhydrous ammonium salt.

[0003]

However, in the above-described instant cooling device, since water is released only from the crushed perlite, a large number of pearlites are not crushed by applying a great amount of stress such as rubbing sufficiently during use. There was a problem that the temperature could not be kept sufficiently low. Further, such a troublesome operation is extremely troublesome in the case of urgent cooling, and the cooling effect is delayed. Further, even if a large amount of pearlite is crushed to crush a large number of pearlite to bring it to a low temperature state, it is necessary to crush the remaining pearlite to release water in order to maintain the cooling effect. However, it was difficult to crush the particles of pearlite remaining in the liquid state. However, since it is entirely liquid, the water adsorbed by the remaining perlite may be gradually released. However, in any case, since it is in a liquid state as a whole, it is not substantially sufficient to maintain the cold-retaining effect for a long time by the heat of the air other than the contact surface with the affected part to be cooled.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above, and an anhydrous ammonium salt, pearlite, and a watertight bag are housed inside a flexible bag material. In addition, the present invention relates to an instant cooling device which is characterized in that when used, water and an anhydrous ammonium salt are brought into contact with each other to cause a reaction by cleaving the bag inside the bag material.

The bag material used in the present invention is not particularly limited as long as it has flexibility and liquid tightness. For example, a synthetic resin or rubber bag material is used. be able to. Further, since this bag material contains an anhydrous ammonium salt having a high hygroscopicity inside, it is desirable to use a material having a low moisture permeability so as not to cause deliquescence during storage of the product.

The anhydrous ammonium salt used in the present invention may be ammonium nitrate (ammonium nitrate) or the like.

Further, as is well known, the perlite used in the present invention is porous in itself, and the water contacting it due to the capillary phenomenon is instantly adsorbed (absorbed) by the internal fine voids, and the perlite is about 2 times its own weight. It has a water absorption capacity that is more than twice as high, and its water absorption performance is extremely stable. The particle size of this pearlite is not particularly limited, but it is desirable to use a particle size suitable for crushing.

[0008] The water-tight bag used in the present invention may be cleaved when a predetermined external stress is applied, and if it is not cleaved unless the predetermined external stress is applied. The material and structure may be used. For example, the material may be entirely made of the same material, or only a part thereof may be made of a brittle material, and the whole or only part may be ruptured by an operation such as rubbing. . Alternatively, a structure may be employed in which an opening is formed by punching a predetermined portion by tapping the portion.

The cooling effect in the present invention is caused by the reaction between water and anhydrous ammonium salt, and the ratio of the amount of water and anhydrous ammonium salt used is 30 to 60 water.
% By weight, 30-60% by weight of anhydrous ammonium salt.
Further, pearlite is 1 to 15% by weight. If the amount used is not appropriate, for example, if the amount of perlite is too small, when the bag is cleaved and water is released, almost all of the anhydrous ammonium salt reacts with water, and therefore extremely Although a low temperature can be achieved, the cooling effect ends in an extremely short time. On the contrary, if the amount of perlite is too large, it is sufficient that perlite adsorbs almost all the amount of water and a very small amount of anhydrous ammonium salt reacts with water when the bag is cleaved and water is released. The low temperature condition cannot be obtained.

As described above, in the instant cooling device of the present invention, the water sealed inside the bag is released by cleaving the bag inside the bag, and some of the water is anhydrous ammonium salt. Endothermic reaction occurs when it contacts with, and some water contacts with perlite and is adsorbed in the fine voids. Therefore, in the instant cooling device of the present invention, the cooling effect is promptly exerted, and at the same time, the water adsorbed on the perlite is gradually released later to react with the anhydrous ammonium salt, and the cooling effect can be maintained. Alternatively, when the pearlite is crushed by rubbing it, the water adsorbed is released and the cooling effect can be maintained. Further, since perlite is porous as described above, it has a heat insulating property and maintains a cooling effect for a long time. That is, in the present invention, since the pearlite is not crushed at the beginning of use like the conventional one, most pearlite remains without being crushed in a low temperature state, and thus this pearlite has a cooling effect due to the above-mentioned heat insulating property. Lasts longer. Alternatively, it is also considered that a low-temperature liquid substance in which an anhydrous ammonium salt is dissolved in water is adsorbed in the fine voids of pearlite to maintain the cooling effect for a long time.

[0011]

【Example】

<Examples 1 to 5> As shown in FIG. 1, the following materials were housed in a bag material 1 made of polyethylene (nylon may be used) to produce instant cooling tools of Examples 1 to 5. 70 g of ammonium nitrate was used as the inorganic ammonium salt 2. 2 g of pearlite 3 in Example 1, 5 g in Example 2,
8 g was used in Example 3, 10 g was used in Example 4, and 15 g was used in Example 5. Polyester (PET) and ethylene vinyl acetate (EV
A bag 5 made of a laminated film (K-PET) with A) was housed together with the inorganic ammonium salt 2 and pearlite 3.

<Measurement of Cooling Effect> The minimum temperature and the duration of 10 ° C. of the instant cooling devices of Examples 1 to 5 and two commercial products for comparison (products not containing perlite) were measured. The results are shown in Table 1.

[0013]

[Table 1]

<Test Results> As is clear from Table 1 above, the instant cooling tools of Examples 1 to 5 of the present invention had better cooling temperature and duration than the commercially available products. In particular, the instant cooling device of Example 3 containing 8 g of pearlite had the lowest minimum temperature and the longest duration of 10 ° C.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-mentioned embodiments and can be implemented in any manner as long as the configuration described in the claims is not changed. be able to.

[0016]

As described above, in the instant cooling device of the present invention, the water sealed inside the bag is released by cleaving the bag inside the bag, and a part of the water is removed. An endothermic reaction occurs in contact with the anhydrous ammonium salt and the cooling effect acts quickly, and some water is adsorbed in the fine voids in contact with perlite and gradually released later to react with the anhydrous ammonium salt, The cooling effect can be sustained.
Alternatively, by rubbing the pearlite, the pearlite is crushed and the water adsorbed at that time is released, so that the cooling effect can be maintained. Moreover, in the present invention, since pearlite is not crushed at the beginning of use as in the conventional case, a cooling (cooling) effect can be promptly exerted. Moreover, since most of the perlite remains without being crushed in the low temperature state, the cooling effect can be maintained for a long time due to the heat insulating property of the perlite itself. Therefore, in the event of an accident such as a bruise, a sprain, or a burn, or when a toothache or a fever occurs, the affected part or the like can be cooled more quickly and cooler than before.

[Brief description of drawings]

FIG. 1 is a sectional view showing an instant cooling device according to an embodiment.

[Explanation of symbols]

 1 bag material 2 anhydrous ammonium salt 3 pearlite 4 water 5 bag body

Claims (1)

[Claims] 1. A flexible bag material containing anhydrous ammonium salt, perlite, and a bag body sealed with water, and the bag body is cleaved inside the bag material during use. An instant cooling tool characterized by bringing water and anhydrous ammonium salt into contact with each other to cause a reaction.