阅读说明：本技术 冷却包 (Cooling bag ) 是由 渡边裕喜仁 于 2019-08-06 设计创作，主要内容包括：【课题】提供一种与以往的冷却包相比,冷却性能更高、尤其是使用后作为保冷剂再利用时的冷却性能可得到飞跃性提升的冷却包。【解决手段】冷却包1包括：水袋10,其容纳有水10a；以及外袋11,其将水袋10和与水10a起反应而吸热的致冷剂11a容纳并密封在其内部,水袋10受到来自外部的击打而破裂后,水10a与致冷剂11a发生吸热反应而进行冷却。冷却包1的外袋11中含有聚丙烯酸钠11b。通过此结构,冷却包1与以往的冷却包相比,冷却性能更高、尤其是使用后作为保冷剂再利用时的冷却性能可得到飞跃性地提升。(Provided is a cooling pack which has higher cooling performance than a conventional cooling pack, and particularly, which can dramatically improve the cooling performance when reused as a coolant after use. [ MEANS FOR solving PROBLEMS ] A cooling pack (1) comprises: a water bag 10 containing water 10 a; and an outer bag 11 that accommodates and seals the water bag 10 and the refrigerant 11a that absorbs heat by reacting with the water 10a, and cools the water 10a and the refrigerant 11a by breaking the water bag 10 by external impact. The outer bag 11 of the cooling pack 1 contains sodium polyacrylate 11 b. With this configuration, the cooling pack 1 has higher cooling performance than a conventional cooling pack, and particularly, the cooling performance when it is reused as a coolant after use can be dramatically improved.)

1. A cooling pack comprising a water bag for containing water and an outer bag for containing and sealing the water bag and a refrigerant which absorbs heat by reaction with water in the inner portion thereof, wherein the water bag is broken by being struck from the outside and the water and the refrigerant are cooled by the endothermic reaction, characterized in that,

the outer bag contains sodium polyacrylate.

2. The cooling pack according to claim 1, wherein the refrigerant contained in the outer bag uses at least one of ammonium nitrate and urea.

3. The cooling pack of claim 1 or 2, wherein the outer bag further comprises silica gel.

4. The cooling pack according to claim 3, wherein (a) at least one of urea and ammonium nitrate, (b) sodium polyacrylate, (c) silica gel, and (d) water in the water bag are formulated so that (b) sodium polyacrylate is 0.5 wt% or more, wherein the sum of the contents of (a), (b), (c), and (d) is 100 wt%.

5. The cooling pack according to claim 4, wherein the outer bag contains 35 wt% of at least one of urea and ammonium nitrate, (b)1 wt% of sodium polyacrylate, and (c)1 wt% of silica gel, and the water bag contains 63 wt% of water.

6. A compounding agent for instantaneous cooling, characterized by comprising (a)35 wt% of at least one of urea and ammonium nitrate, (b)1 wt% of sodium polyacrylate, (c)1 wt% of silica gel, and (d)63 wt% of water as main components.

Technical Field

The present invention relates to a cooling pack for use in the instantaneous cooling of an object to be cooled.

Background

In recent years, a so-called cooling pack has been widely used as a product capable of instantaneous cooling in the treatment of heatstroke or fever.

The cooling pack is formed by filling a granular refrigerant mixed with ammonium nitrate, urea, or the like into an outer bag made of plastic resin such as polyethylene, and heat-sealing the outer bag in a state where a water bag is also filled inside the outer bag. While cooling, the outer bag is struck with a fist from the outside with the cooling pack held by one hand or placed horizontally to break the water bag contained inside the outer bag. Then, the refrigerant in the outer bag is mixed with water, and cooling is started by an endothermic reaction, so that instantaneous cooling can be realized.

The refrigerant contained in the outer bag is generally a substance that causes an endothermic reaction when dissolved in water, and for example, ammonium sulfate, ammonium nitrate, urea, or the like can be used. Also, carboxymethyl cellulose (CMC) may be contained as a thickener in the interior depending on the manufacturer.

The cooling pack used in the cooling function is often reused as a refrigerant after being placed in a freezer and cooled for a certain period of time or longer.

There has been disclosed a cooling pack which is convenient to operate and which solves the problem that a refrigerant melts and solidifies into a lump at an external temperature (for example, see patent document 1). Further, an instantaneous cooling pack is disclosed which is capable of instantaneously cooling an object to be cooled and can prolong a cold retention time (for example, see patent document 2).

Disclosure of Invention

Problems to be solved by the invention

However, the cooling pack which has been sold in the past has a cooling effect of obtaining a cooling temperature of about 30 minutes or less by leaving it at room temperature of 30 ℃ and a cooling performance of zero degrees or less is still insufficient as the cooling temperature.

In particular, when the cooling pack is put into a freezer and frozen after use and reused as a cold-keeping agent, the conventional cooling pack has a problem that the cooling duration is extremely short, with the melting point immediately becoming 0 ℃ or higher and zero degrees or lower.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a cooling pack which has higher cooling performance than a conventional cooling pack, and in particular, which can dramatically improve the cooling performance when the cooling pack is reused as a coolant after use.

Means for solving the problem

In order to achieve the above object, the present invention provides a cooling pack comprising a water bag containing water and an outer bag containing and sealing the water bag and a refrigerant which absorbs heat by reacting with the water inside the outer bag, wherein the water bag is broken by being struck from the outside and the water and the refrigerant react with each other to cool, wherein the outer bag contains sodium polyacrylate.

In the cooling pack of the present invention, at least one of ammonium nitrate and urea is preferably used as the refrigerant contained in the outer bag.

Further, in the cooling pack of the present invention, it is preferable that the outer bag further contains silica gel.

In the cooling pack of the present invention, the (a) at least one of urea and ammonium nitrate, (b) sodium polyacrylate, (c) silica gel, and (d) water in the water bag (wherein (a) + (b) + (c) + (d) ═ 100 wt%) are blended in the outer bag, and the (b) sodium polyacrylate is preferably 0.5 wt% or more.

Further, in the cooling pack of the present invention, it is preferable to blend in the following ratio: 35 wt% of at least one of (a) urea and ammonium nitrate, 1 wt% of (b) sodium polyacrylate, 1 wt% of (c) silica gel, and 63 wt% of (d) water in the water bag (wherein 100 wt% of (a) + (b) + (c) + (d)).

In order to achieve the above object, the present invention provides a compounding agent for instantaneous cooling, comprising (a)35 wt% of at least one of urea and ammonium nitrate, (b)1 wt% of sodium polyacrylate, (c)1 wt% of silica gel, and (d)63 wt% of water (wherein (a) + (b) + (c) + (d) ═ 100 wt%) as main components.

Effects of the invention

The cooling pack of the present invention comprises a water bag and an outer bag which contains and seals the water bag and a refrigerant which absorbs heat by reaction with water inside, wherein the water bag is broken by external impact, the water and the refrigerant undergo an endothermic reaction to cool, and the outer bag contains sodium polyacrylate. With this configuration, the cooling pack according to the present invention has a higher cooling performance than the conventional cooling pack, and particularly, the cooling performance when the cooling pack is reused as a coolant after use can be dramatically improved.

Drawings

Fig. 1 is a schematic sectional view of a cooling pack for explaining an embodiment of the present invention.

Fig. 2 is a schematic diagram showing temperature changes when the cooling pack of embodiment 2 of the present invention and the cooling pack of comparative example 2 are reused.

Detailed Description

(embodiment mode)

A cooling pack according to an embodiment of the present invention will be described with reference to fig. 1. The cooling bag 1 is applied to emergency treatment when fever, headache and the like occur; and sunstroke prevention in sports, leisure, work, learning, and the like, and is widely used as a convenient product that can be cooled instantaneously.

First, the structure of the cooling pack 1 will be explained with reference to fig. 1. The cooling pack 1 is, for example, a rectangular bag body including: a water bag 10 containing water 10 a; and an outer bag 11 in which the water bag 10 and a refrigerant 11a that absorbs heat by reacting with the water 10a are heat-sealed. When the water bag 10 is broken by external impact, the water 10a and the refrigerant 11a undergo endothermic reaction, thereby generating a cooling effect. The dimensions of the cooling pack 1 are, for example, about 180mm wide by 110mm high.

The water bag 10 and the outer bag 11 are made of, for example, a thermoplastic resin such as polyethylene, nylon, polyamide, or the like. Generally, the water bag 10 is thin so that it can be broken by external impact, the outer bag 11 is formed of resin, and the thickness of the resin is set so as not to be easily broken by external impact.

In the outer bag 11 of the cooling pack 1, sodium polyacrylate 11b serving as a tackifier for preventing a rapid flow of water 10a from the water bag 10 is contained. At least one of ammonium nitrate and urea is used as the refrigerant 11a contained in the outer bag 11. At this time, only one of ammonium nitrate and urea may be used, or both may be mixed in a predetermined ratio.

The outer bag 11 of the cooling pack 1 further contains silicone gel 11c as a tackifier. By containing these thickening agents (sodium polyacrylate 11b and silicone 11c) in the outer bag 11, it is possible to prevent the water 10a from flowing out into the outer bag 11 at a burst and reacting with the refrigerant 11a, and to maintain the cooling temperature and the cooling duration appropriately.

More specifically, the components are prepared according to the following mixture ratio: 35 wt% of at least one of urea and ammonium nitrate as the refrigerant 11a in the outer bag, (b)1 wt% of sodium polyacrylate 11b, (c)1 wt% of silica gel 11c, and 63 wt% of (d) water 10a in the water bag 10 (wherein (a) + (b) + (c) + (d) ═ 100 wt%). Further, the sodium polyacrylate 11b (b) is preferably 0.5 wt% or more.

Next, the use of the cooling pack 1 of the present embodiment will be described. First, when a predetermined cooling is required, the water bag 10 is hit from the outside of the cooling pack 1 to a punch-down degree, and only the water bag 10 is broken. The water 10a flowing out into the outer bag 11 reacts with the refrigerant 11a, and when the refrigerant 11a is dissolved in the water 10a, an endothermic reaction occurs, and the dissolution heat is absorbed from the surroundings to start rapid cooling. At this time, in the cooling pack 1 of the present embodiment, the water 10a gradually becomes pasty due to the effect of the sodium polyacrylate 11b and the silica gel 11c as the thickening agents, and the heat insulating effect is exhibited to extend the cold insulation duration time and to keep the cooling temperature low. Also, the endothermic reaction of the water 10a and the refrigerant 11a gradually proceeds.

Thereafter, the granular refrigerant 11a gradually undergoes an endothermic reaction with the water 10a, and the reaction continues until all the refrigerant 11a is dissolved in the water 10 a. As a result, the cooling pack 1 can be cooled at a lower temperature and can have a longer cooling duration than conventional products.

Next, reuse of the cooling pack 1 of the present embodiment will be described. In general, the cooling pack 1 after use of the cooling function can be reused (reused) as a cold-retaining agent by being left in a freezer and cooled for a certain period of time or longer. When the cooling pack 1 is reused, it can be left in a freezer for about 6 hours, for example, and can be reused as a coolant after freezing. In this case, the cooling pack 1 of the present embodiment contains sodium polyacrylate 11b therein, and has higher viscosity than conventional products. As a result, once the heat-insulating effect is exhibited, the cooling duration particularly around-10 ℃ is dramatically increased, and the state of a low cooling temperature can be maintained for a very long time as compared with the conventional one. In the case of reuse, for example, when the material is frozen in a freezer for about 10 minutes, the material is immediately cooled, and the cooling effect can be obtained repeatedly.

As described above, the cooling pack 1 of the present embodiment includes: a water bag 10 containing water 10 a; and an outer bag 11 that accommodates and seals the water bag 10 and the refrigerant 11a that absorbs heat by reacting with the water 10a, and cools the water 10a and the refrigerant 11a by breaking the water bag 10 by external impact. The outer bag 11 of the cooling pack 1 contains sodium polyacrylate 11 b. At least one of ammonium nitrate and urea is used as the refrigerant 11a contained in the outer bag 11. Further, the outer bag 11 may contain silica gel 11 c. More specifically, the outer bag 11 comprises the following main components in percentage by weight: (a)35 wt% of at least one of urea and ammonium nitrate as the refrigerant 11a, 1 wt% of (b) sodium polyacrylate 11b, 1 wt% of (c) silica gel 11c, and 63 wt% of (d) water 10a in the water bag 10 (wherein (a) + (b) + (c) + (d) ═ 100 wt%). As a result, the cooling pack 1 has higher cooling performance than the conventional cooling pack, and particularly, the cooling performance when it is reused as a coolant after being used for instantaneous cooling can be dramatically improved. More specifically, the cooling duration at a cooling temperature of about-10 ℃ can be significantly increased when the cooling pack 1 is reused after use.

< Cold insulation test >

Next, a cold insulation test was performed using example 1 of the cooling pack 1 of the present embodiment and comparative example 1 of the conventional cooling pack. In addition, this test is a test for judging the cold insulation performance of the cooling pack (measuring the surface temperature of the cooling pack corresponding to the elapsed time).

(example 1)

In example 1, the following ingredients were mixed: the cooling pack 1 contained in the outer bag 11 contained therein (a)35 wt% of urea as the refrigerant 11a, (b)1 wt% of sodium polyacrylate 11b, (c)1 wt% of silica gel 11c, and (d)63 wt% of water 10a contained in the water bag 10 (wherein (a) + (b) + (c) + (d): 100 wt%).

Comparative example 1

In comparison with example 1, in comparative example 1, an outer bag containing 35g of ammonium nitrate and a small amount of silica gel and a water bag containing 48g of water were hit with a punch applied downward to break the water bag and react the refrigerant with the water.

Each sample of example 1 and comparative example 1 prepared as described above was evaluated. As evaluation methods and conditions, the following measurements were performed.

Measurement of surface temperature

After the water bag is broken according to the method of use, a temperature sensor is attached to the central portion of the back surface of the cooling pack to measure the surface temperature. The cooling pack was placed face down in a thermostatic chamber at 25. + -. 1 ℃ and the sample was left to stand flat. The test results of each sample are shown in Table 1 below.

[ Table 1]

Elapsed time (minutes)	Example 1	Comparative example 1
			0	-0.4	-0.8
30	13.6	15
			60	19.2	21

As can be seen from the results of the surface temperatures in example 1 and comparative example 1 shown in [ table 1], the cooling performance and the cooling duration of example 1 were improved as compared with comparative example 1.

< Cold insulation test for reuse of Cooling bag >

Next, a cold insulation test was performed when the cooling pack was reused, using example 2 of the cooling pack 1 of the present embodiment and comparative example 2 of the conventional cooling pack.

(example 2)

In example 2, the following ingredients were mixed: the cooling pack 1 contained in the outer bag 11 contained therein (a)35 wt% of urea as the refrigerant 11a, (b)1 wt% of sodium polyacrylate 11b, (c)1 wt% of silica gel 11c, and (d)63 wt% of water 10a contained in the water bag 10 (wherein (a) + (b) + (c) + (d): 100 wt%). Next, after the instant cooling use of the cooling pack 1, the cooling pack was put into use in a freezer for 6 hours.

Comparative example 2

In order to compare with example 2, comparative example 2 used a cooling pack having an outer bag in which 35g of ammonium nitrate and a small amount of silica gel were sealed and a water bag in which 48g of water was sealed, and then the cooling pack was left in a freezer for 6 hours and used. Subsequently, each sample of example 2 and comparative example 2 was evaluated, and the test results are shown in fig. 2 and the following [ table 2 ].

Measurement of surface temperature

A temperature sensor is attached to the center of the back surface of the cooling pack taken out of the freezer, and the surface temperature is measured. The cooling pack was placed face down in a thermostatic chamber at 25 ± 1 ℃, and the sample was placed flat in a refrigerated pack (coolerpack).

[ Table 2]

Elapsed time (minutes)	Example 2	Comparative example 2
			0	-11	-5.6
30	-11	-5.6
			60	-10	-0.6
90	-10	7.8
			120	-10	8.4
150	-6.6	10.4
			180	-4	13.4
210	8.4	16.4
			240	13.6	21.6

As can be seen from the results of the surface temperatures in example 2 and comparative example 2 shown in fig. 2 and [ table 2], the cooling duration time at a cooling temperature of about-10 ℃ was significantly longer in example 2 than in comparative example 2, and the cooling performance in recycling was significantly improved as compared with the conventional product.

The present invention is not limited to the configuration of the above embodiment, and various modifications can be made without changing the gist of the present invention. For example, ammonium nitrate, potassium nitrate, or the like may be used as the refrigerant. The above-mentioned compounding ratio is not limited to the application to the cooling pack 1, but may be applied to other fields requiring cooling as a compounding agent for instantaneous cooling, which contains (a)35 wt% of at least one of urea and ammonium nitrate, (b)1 wt% of sodium polyacrylate, (c)1 wt% of silica gel, and (d)63 wt% of water (wherein (a) + (b) + (c) + (d) ═ 100 wt%) as a main component.

Description of the reference numerals

1 Cooling bag

10 water bag

10a water

11 outer bag

11a refrigerant

11b PolyAcrylic acid sodium salt

11c silica gel