JPH0914810A - Instantaneous cooling pack, method for performing fast cooling with instantaneous cooling pack and method for extending cold state keeping time - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a cooled item to be instantly cooled and further to extend a cold state keeping time by a method wherein an inner bag having water acting as a cryogenic component, a salt having water of crystallization and a polymer absorbing agent sealingly enclosed therein is enclosed within an outer bag having a salt or the like enclosed therein. SOLUTION: An outer bag 1 in which a nylon sheet with a thickness of 0.04mm and a polyethylene sheet with a thickness of 0.03mm for example, are laminated is made and further an inner bag 2 in which a nylon sheet with a thickness of 0.02 on and a polyethylene sheet with a thickness of 0.02mm, for example, are laminated is also made. Sodium nitrate 3 acting as a cryogenic component is enclosed in the outer bag 1. Water 4, sodium sulfate 5 acting as a salt having water of crystallization and carboxymethylcellulose 6 acting as high molecular adsorption agent are enclosed in the inner bag 2. Then, the inner bag 2 is sealingly enclosed in the outer bag 1 and an opening 7 is adhered. As a certain shock is applied to the inner bag 2 to cause the inner bag to be broken and sodium nitrate 3 and the water 4 are reacted to each other to start a fast cooling there. Then, crystal of the sodium sulfate 5 is broken and water of crystallization is gradually released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pack capable of instantaneously cooling an object to be cooled and a method for rapidly cooling the object to be cooled and extending its cooling time.

[0002]

2. Description of the Related Art A known cooling pack is one in which water and a cryogen are enclosed, and the water and the cryogen are mixed to cause the water and the cryogen to react with each other, and the heat of dissolution is removed from the surroundings to cool the object to be cooled. I am letting you.

In the above method, water and the cryogen are simply a rapid reaction, and the object to be cooled is rapidly cooled, but the cryogen is dissolved in several tens of seconds. The effect was not enough.

It is also known that a freezing agent and a salt containing water of crystallization are prepared in another bag to extend the cold keeping time, and these are filled in another bag and enclosed, but the water of crystallization is released from the salt. Therefore, it takes patience to give shocks and loosen, and it takes a few minutes to tens of minutes to start cooling, and it is useless when it is necessary to cool it urgently. It has the drawback of not being used and has not been put to practical use. Further, during storage of the cold-insulating bag, the freezing agent may be solidified by crystal water that is sensitive to temperature changes, and may become unusable as a lump.

[0005]

SUMMARY OF THE INVENTION The present invention has been made based on the above circumstances, and provides an instantaneous cooling pack and an instantaneous cooling pack capable of instantaneously cooling an object to be cooled and extending its cold retention time. It is an object of the present invention to provide a rapid cooling method and a method of extending the cold insulation time.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, a salt containing a cryogen component, water and crystallization water, and a polymeric absorbent are enclosed in an outer packaging bag in which salts of a cryogenic component are enclosed. The step of encapsulating the cryogenic agent in the instant cooling pack and the outer encapsulating bag with the inner encapsulating bag sealed, the step of encapsulating the salt containing the cryogen component water and crystal water and the polymer absorbent in the inner enclosing bag, and Encapsulating the inner bag, rupturing the inner bag, reacting the cryogen in the outer bag with water, and releasing water of crystallization from the salt containing crystal water in the inner bag and reacting with the cryogen in the outer bag The method comprises a rapid cooling method comprising steps and a method for extending the cold insulation time.

According to the above construction, after the cryogen is enclosed in the outer bag, the salt containing water of the cryogen component, the salt having crystallization water, and the polymer absorbent are enclosed in the inner bag, and the inner bag is enclosed in the outer bag. Then, when the inner bag is ruptured, the freezing agent and water in the outer bag react with each other, crystal water is released from the salt having crystallization water in the inner bag, and reacts with the freezing agent in the outer bag to rapidly cool the cooled object and Cooling for a long time is secured.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view of an instant cooling pack according to an embodiment of the present invention.

Nylon with a thickness of 0.04 mm and a thickness of 0.0
180mm length laminated with 3mm polyethylene,
An outer bag (1) having a width of 100 mm is prepared. Further, an inner bag (2) having a length of 90 mm and a width of 50 mm is prepared by laminating 0.02 mm-thick nylon and 0.02 mm-thick polyethylene. 90 g of sodium nitrate (3) is enclosed in the outer bag (1). Also, 42 g of water (4) and sodium sulfate (5) 6 having crystal water in the inner bag (2).
0 g, carboxymethyl cellulose (CMC) (6) 1
Enclose g. The inner bag (2) is enclosed in the outer bag (1) and the opening (7) is bonded. When the inner bag (2) is impacted to the extent that a fist is swung down, the inner bag (2) ruptures, and when sodium nitrate (3) and water first react and dissolve, the heat of dissolution is taken from the surroundings and rapidly cooled. Is started. Next, the crystals of sodium sulfate (5) having water of crystallization are broken and the water of crystallization is gradually released, reacts with sodium nitrate (3), and the sodium nitrate proceeds until the final dissolution is completed. At this time, due to the effect of the polymer absorbent of carboxymethyl cellulose (CMC), it becomes gelatinous and exerts a heat insulating effect to provide a function of keeping cold.

As a comparative example, the following cooling agent and cooling method were performed. A wrapping bag containing 90 g of sodium nitrate and a wrapping bag containing 42 g of water are given an impact to the extent that the fist is swung down, and each wrapping bag is ruptured to react sodium nitrate with water.

A cold insulation test was conducted on the cooling packs of the above-mentioned Examples and Comparative Examples. After cooling the sample based on the method of use, a temperature sensor was attached to the center of the back surface of the cooling pack. Two sheets of underlayment were stacked in a thermostatic chamber at 25 ± 1 ° C., and the back side of the cooling pack was faced down to allow the sample to stand flat. The temperature of the back surface of the cooling pack at that time was measured. The test results are as shown in Table 1. Here, the temperature of the cooling pack with respect to the elapsed time was measured.

[0012]

[Table 1]

As shown in Table 1, the temperature of the back surface of the cooling pack of the comparative example of 90 minutes elapsed is 7.8 ° C., whereas that of the example of the present invention is 5.5. C., and those of the examples of the present invention had a longer cold storage time than the conventional ones.

10 ° C. of the quenching agent when the weight ratio of sodium nitrate in the inner bag and the outer bag, sodium sulfate containing water of crystallization, and carboxymethyl cellulose (CMC) is changed.
Table 2 shows the duration of the rise. In addition,
The minimum temperature is the temperature after 60 minutes have elapsed.

[0015]

[Table 2]

As shown in Table 2, when the weight ratio of sodium sulphate having water of crystallization 59%, water 40% and carboxymethylcellulose 1% is the longest, the cold storage time becomes the longest.

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the invention. For example, ammonium nitrate or potassium nitrate may be used as the cryogen.

[0018]

As described above, according to the present invention,
The inner bag is ruptured, and the freezing agent in the outer bag reacts with water to release the crystal water from the salt containing the water of crystallization in the inner bag and react with the freezing agent in the outer bag, thereby gradually releasing the water of crystallization and freezing. The reaction of can be repeated to extend the cold storage time, and it can be widely applied to things such as emergency use, food use, and leisure use.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of an instant cooling pack that is an embodiment of the present invention.

[Explanation of symbols]

 1 Outer bag 2 Inner bag 3 Cryogen 4 Water 5 Sodium sulfate with water of crystallization 6 Carboxymethylcellulose 7 Open

Claims (6)

[Claims] 1. A moment characterized in that an outer envelope bag in which salts of one component of a cryogenic agent are encapsulated is sealed with an inner envelope bag in which salts having water and crystallization water of a cryogen component and a polymer absorbent are encapsulated. Cooling pack. 2. The instant cooling as claimed in claim 1, wherein the cryogen component in the outer bag is sodium nitrate, and the ingredient in the inner bag is water and sodium sulfate decahydrate having crystallization water and carboxymethyl cellulose. pack. 3. The instant cooling pack according to claim 1, wherein the outer bag comprises a 0.07 mm thick nylon film / polyethylene film laminate film and the inner bag comprises a 0.04 mm thick nylon film / polyethylene film laminate film. 4. A step of enclosing a cryogen in an outer bag, a step of encapsulating a salt having water and crystallization water of a cryogen and a polymer absorbent in an inner bag, and enclosing an inner bag in the outer bag. A step of rupturing the inner bag, a step of reacting the freezing agent of the outer bag with water, and a step of reacting with the freezing agent of the outer bag by releasing crystal water from the salt having crystal water of the inner bag. Characterizing rapid cooling and extension of cold storage time. 5. The rapid cooling according to claim 4, wherein the cryogen component in the outer bag is sodium nitrate, and the component in the inner bag is water and sodium sulfate decahydrate having crystallization water and carboxymethylcellulose. And how to extend cold storage time. 6. The rapid cooling and cooling time according to claim 4, wherein the outer bag comprises a 0.07 mm thick nylon film / polyethylene film laminate film and the inner bag comprises a 0.04 mm thick nylon film / polyethylene film laminate film. Extension method.