JPH02166374A - Cold heat material pack - Google Patents

Abstract

PURPOSE:To extend sharply cold insulation time in which a good feeling touch an be felt by separating two hydrate bags, forcibly breaking and opening a first hydrate bag, pushing down a pushing rod, which is an opening rod, then opening a second hydrate bag after a specified time, and mixing a hydrate agent with an endothermic agent so as to cause endothermic reaction. CONSTITUTION:A cold heat material pack 11 comprises two hydrate bags, say, a first hydrate bag 12A and a second hydrate bag 12B, an endothermic bag 15, and an outer covering layer 16 which contains a polymeric endothermic agent 18 covering the outer sides of the endothermic bag 15 and the hydrate bags 12. When the hydrate bag 12A is broken open with a pushing rod 21, an endothermic agent 17 in the endothermic bag 12A is mixed with an endothermic agent 13 in the endothermic bag 15, thereby causing endothermic reaction and lowering the temperature in the endothemric bag 15 as well. The moisture separated by the endothermic reaction is absorbed into a polymeric hydrate agent 14, turned into gel state so that a good feeling touch may be provided to the skin in contact with the outer covering layer 16 placed on the outside of the endothermic bag 15. Dew drops and human sweat outside the hydrate bags and the endothermic bag are also absorbed into a polymeric water absorption agent 18. Then, the hydrate agent 17 in the hydrate bag 12B is mixed with an endothermic agent 13 in the endothermic bag 15, thereby causing endothermic reaction, and lowering the temperature in the endothermic bag 15 again. It is, therefore, possible to extend cold insulation time which provides a good feeling touch.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is a cooling material pack that can be used to easily obtain a cooling heat source for leisure and sports viewing in hot seasons, medical use, emergency use, high temperature workplaces, etc. It can easily obtain a source of cooling and heat and can be used for a long time both indoors and outdoors.
The present invention also relates to a cooling material pack that feels good on the skin.

(Prior art) As a conventional cooling material pack as a cooling heat source, for example,
In a double-walled bag with one small inner bag inside a large outer bag, water is poured into the inner bag, and granular urea and ammonium nitrate (ammonium nitrate) are added to the outside of the inner bag as heat-absorbing agents. There are some that contain mixtures. When cold heat is required, the inner bag is destroyed by hitting the outer bag from the outside, and the water in the inner bag and the heat absorbing agent in the outer bag are mixed to cause an endothermic reaction and the temperature is lowered. , which provides a source of cold and heat.

(Problem to be solved by the invention) However, because the endothermic agent and the water in the inner bag react instantaneously, the endothermic reaction is rapid and the temperature of the cooling material pack becomes low instantaneously, but after the reaction is completed, Due to the large temperature difference with the air temperature, the temperature rises rapidly.

For this reason, the cooling material pack has a problem in that the cold storage time during which a cooling sensation can be obtained is short.

In addition, when the cooling material pack rapidly becomes low temperature due to an endothermic reaction, condensation occurs on the outside of the outer bag of the cooling material pack, and as time passes, the condensation increases and flows out in the form of water droplets, causing the outer bag to come into direct contact with the skin. However, there are problems in that water droplets cause discomfort, and sweat from the human body cannot be absorbed, causing discomfort.

Therefore, the present invention provides at least two bags for storing the water-containing agent, and the water-containing agent and the heat-absorbing agent in the water-containing bag are mixed by pushing open each bag and making it possible to mix the water-containing agent and the heat-absorbing agent. The mixing and endothermic reactions are carried out in two batches at the desired time, greatly increasing the cooling time.
To provide a cooling material pack that has a good feel even when worn directly on the skin.

(Means for Solving the Problems) A cooling material pack according to the present invention includes at least two moisture-containing bags, a moisture-containing agent stored in the moisture-containing bag and containing moisture, and reacting with moisture in the moisture-containing agent to cause an endothermic reaction. a polymeric water-absorbing agent that absorbs water generated by the endothermic reaction, an endothermic bag that is connected to each water-containing bag and stores the endothermic agent and the polymeric water-absorbing agent, and a heat-absorbing bag that is attached to each water-containing bag and that pushes through the water-containing bag. an opening means that opens the first water-containing bag among the two water-containing bags, and opens the second water-containing bag among the two water-containing bags after a predetermined time has elapsed. The water-containing bag is opened, and a water-containing agent and an endothermic agent are mixed to cause an endothermic reaction. Further, it is preferable that the opening means penetrates the water-containing bag from the outside of the water-containing bag and opens the bag. The outer surfaces of the water-containing bag and the heat-absorbing bag may be covered with an outer covering layer containing a polymeric water-absorbing agent.

Here, the water-containing agent that contains water is a compound that contains water or water of crystallization, such as sodium sulfate (sodium sulfate decahydrate Na, 304 ・l0H80), sodium carbonate decahydrate (NazCO + 10H, O ), sodium thiosulfate pentahydrate (Na.

S, 03 ・5H, O) Calcium chloride hexahydrate (Cac
Examples include salts containing water of crystallization such as l, ・6) f, and o).

In addition, as an endothermic agent, ammonium nitrate (ammonium nitrate NH4
No. 3), sodium nitrate (NaNOi), ammonium chloride (ammonium chloride NH, Ct), urea (NHg) x Co
), potassium chloride (KCI), potassium nitrate (KNO
3>, and mixtures thereof in appropriate amounts.

In addition, the endothermic reaction is due to the reaction between the endothermic agent and the moisture in the water-containing bag, and it is preferable to use salt containing crystal water rather than water. ) are test examples 4 and 11 in the following table.
As shown by the arrow ■ in the figure, the temperature drops rapidly during the negative reaction, sometimes to below freezing, but the temperature also rises rapidly.

For this reason, the cold storage time to maintain a low temperature of 20°C or less is 4
Very short at 5 minutes. The endothermic reaction between the water-containing agent, which is a salt (compound) containing water of crystallization, and the endothermic agent is an endothermic reaction between the crystal water in the water-containing agent and the endothermic agent, and a low temperature can be maintained for a long period of time. In particular, by dividing the water-containing agent, for example into two parts,
If the endothermic agent is mixed in two parts to cause an endothermic reaction, the cooling time can be significantly extended. Those indicated by arrows ■ to ■ in Figure 11 correspond to hot seasons, with temperatures of 30°C.
The test was conducted by placing a glass container in a booth (portable booth manufactured by Sankon Seki Kogyo ■) with a humidity of 58% RH.

Test example 1 in the following table and those indicated by arrow ■ in Fig. 11 are as follows:
This is a case in which 50 g of mirabilite, a water-containing agent, is divided into two portions, and 25 g each is mixed with 50 g of ammonium nitrate, an endothermic agent, in the second portion after a predetermined period of time has passed after the first portion to cause an endothermic reaction.
The first cold storage time is 75 minutes, the second cold storage time is 70 minutes,
The total cold storage time is 145 minutes. That is, the cold storage time tends to be longer if the water-containing agent is added in two times rather than once.

In addition, test example 2.3 in the following table and arrows ■■ in Figure 11 indicate that the water-containing agent mirabilite was tested at 25% under the same test conditions as the above-mentioned arrow ■.
This is the case where the sample was divided into two batches and put into a different heat absorbing agent than Test Example 1, and the total cold storage time was 160 minutes and 13 minutes, respectively.
5 minutes is very long.

(This page, blank space below) In addition, as polymeric absorbents, starch-based starch-acrylic acid graft copolymers, cellulose-based cellulose-acrylonitrile graft copolymers, and vinyl acetate-acrylic acid graft copolymers are also available.
Examples include polymeric water absorbing agents such as methyl methacrylate copolymers. Then, these polymeric water absorbing agents are added and dispersed in the heat absorbing agent. Furthermore, the polymeric water-absorbing agent may be contained within the outer covering layer as a single layer or dispersed within other layers, such as the pulp layer or the flocculent pulp layer.

(Function) The cooling material pack according to the present invention has an opening means that is attached to each water-containing bag and opens the water-containing bag by pushing it open so that the water-containing agent and the heat absorbing agent can be mixed. When the first water-containing bag among the water-containing bags is opened by breaking the water-containing bag with an opening means and mixing with the water-containing agent and the endothermic agent in the first water-containing bag,
An endothermic reaction occurs and the temperature inside the endothermic bag decreases. Then, a cooling sensation is given to the skin, etc. that comes into contact with the heat absorption bag of the cooling material pack.

Next, when the bag is left in the open air, the temperature inside the heat absorbing bag gradually increases due to the high outside temperature. When the cold sensation becomes weak, open the second water-containing bag of the two water-containing bags by opening the 10th water-containing bag.
When opened in the same way as the ice-containing bag, an endothermic reaction occurs in the same way as described above, and the temperature inside the endothermic bag drops again. For this reason, the cold storage time for the cooling material pack to maintain the cooling sensation is long.

In addition, by covering the outer surfaces of the water-containing bag and the heat-absorbing bag with an outer covering layer containing a polymeric water-absorbing agent, water droplets condensed on the outer surface of the water-containing bag and the heat-absorbing bag and sweat from the human body are absorbed.
Gives a cool and dry feeling to the skin.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 5 are diagrams showing a first embodiment of a cooling material pack according to the present invention.

First, the configuration will be explained. In Figure 1.2, 1
Reference numeral 1 denotes a cooling material pack, and the cooling material pack 11 consists of two first parts made of waterproof paper or sheet-like resin such as polyethylene.
Water-containing bag 12A, second ice-containing bag 12B, and first water-containing bag 1
2A, 50 g of ammonium nitrate which is the heat absorbing agent 13 connected to the second ice-containing bag 12B (hereinafter referred to as the water-containing bag 12)
(50 parts by weight) and an appropriate amount of the polymer water absorbing agent 14, each of which is attached to a heat absorbing bag 15 made of waterproof paper or a sheet-like resin such as polyethylene, and each water-containing bag 12 is attached at a position facing the heat absorbing bag 15. Opening means 20A, 20B (
Hereinafter, when representing, it is indicated by 20).

In addition, the cooling material pack 11 includes a heat absorbing bag 15 and a water-containing bag 1.
Outer layer 1 containing a polymeric water absorbing agent covering the outer surface of 2
6 is provided. Each of the water-containing bags 12 contains 25 g (25 parts by weight) of Glauber's Salt, which is a water-containing agent 17.

At this time, of course, water may be stored in the water-containing bag 12 as the water-containing agent 17. The moisture in all of the water-containing agent 17 in the water-containing bag 12 reacts with the endothermic agent 13 to cause an endothermic reaction.

Water generated by this endothermic reaction is absorbed by the polymeric water absorbing agent 14 in the endothermic bag 15 and can be gelled.

Each opening means 20 has a cross section T facing toward the water-containing bag 12 from the outside.
It has a letter-shaped push rod 21, a cylindrical stopper 22 with a cut provided surrounding the push rod 21, and a protective cap 23 that covers these. push rod 21
can be pushed down guided by a tubular guide 24 connecting the opening means 20 and the water-containing bag 12, and can be inserted into the water-containing bag 12 by breaking the water-containing bag 12, and furthermore, the tip 21a of the push rod 21 can be inserted into the water-containing bag 12. The water-containing agent 17 and the endothermic agent 13 can be mixed by pushing open the vicinity of the connecting portion between the endothermic bag 12 and the endothermic bag 15 . The stopper 22 is a safety device to prevent the push rod 21 from being pushed down accidentally.

The outer covering layer 16 is coated with a polymeric water absorbing agent (for example, starch-acrylic acid graft copolymer) 1 outward from the endothermic bag 15 side.
Inner layer 16a containing 8 in the gibber or flocculent pulp
A two-layered structure is formed by the nonwoven fabric 16b and the nonwoven fabric 16b. In the inner layer 16a, the cooling material pack 11 becomes low temperature,
It absorbs water droplets condensed on the outer surfaces of the heat absorbing bag 15 and the water-containing bag 12 of the cooling material pack 11, and also absorbs sweat from the human body. The non-woven fabric 16b covers the outermost surface and gives a nice dry feel to the skin. And outer covering layer 1
6 covers the outside of the heat absorbing bag 15 and the water-containing bag 12 to retain the cold inside the cooling material pack 11 as a whole and increase the cold retention time.

Next, the operation of the present invention will be explained.

In order to obtain a cooling sensation for a long time with the cooling material pack 11 according to the present invention, first, as shown in FIG. , open the cut in the stopper 22 and remove the stopper 22. Push the push rod 21 downward along the guide 24 as shown in FIG. The lower part 12b of the water-containing bag 12A is broken open. By shaking the cooling material pack 11 from side to side, the water-containing agent 17 in the first water-containing bag 12A is removed.
The (mirabilite) moves downward, and the endothermic agent 13 (
When mixed with ammonium nitrate), an endothermic reaction occurs and the temperature inside the endothermic bag 15 drops to about 8°C. The water liberated by the endothermic reaction is absorbed by the polymeric water-absorbing agent 14, gels, and becomes stable in the form of a gelatin. This gelation somewhat improves the sustainability of the endothermic reaction. Also, due to this stabilization, the water inside the heat absorbing bag 15 thickens (does not move or oscillate, becomes semi-solid like gelatin, and becomes smooth on the skin in contact with the outer covering layer 16 of the heat absorbing bag 15). Give good or bad treatment.

Furthermore, since the inner layer 16a of the outer cover layer 16 contains the polymeric water-absorbing agent 18, water droplets due to dew condensation on the outside of the water-containing bag and the heat-absorbing bag 15 and human sweat are absorbed by the polymeric water-absorbing agent 18. Therefore, the outer covering layer 16 of the cooling pack 11 provides a sufficiently cool and dry feeling to the skin.

Next, the cooling material pack 11 is heated to about 7°C in an air temperature of about 30°C.
When the temperature of the cooling material pack rises to about 20° C. after being left for 5 minutes, the second ice-containing bag 12B is removed from the first water-containing bag 1 described above.
2A, it is opened by an opening means 20B attached to the second ice-containing bag 12B. By shaking the cooling material pack 11 from side to side, the mirabilite in the second ice-containing bag 12B is transferred to the endothermic bag 1.
It mixes with the ammonium nitrate in the bag 5 and causes an endothermic reaction, and the temperature in the endothermic bag 15 drops to about 16°C again.

After this, the temperature inside the heat absorbing bag 15 gradually rises at an air temperature of about 30°C, but the temperature range of about 10 to 20°C, where you feel a cooling sensation, can be maintained for another 70 minutes, and the total temperature is about 145°C.
It had a cold retention time of about 2 hours, which was a sufficient cooling sensation.

Furthermore, due to this endothermic reaction, the water liberated from the mirabilite in the second ice-containing bag 12B is further absorbed by the gel-like polymeric water-absorbing agent, which is already partially gel-like, and forms an integral gel, which is stable and gelatin-like as a whole. It has a smooth feel. An outer cover layer 16 is provided on the outside of the heat-absorbing bag 15, and the inner layer contains a polymer water-absorbing agent, so that condensation on the outside of the water-containing bag 12 and the heat-absorbing bag 15 and sweat from the human body are absorbed by the polymer water-absorbing agent. absorbed into. Gives a dry, smooth and pleasant feel to the skin that comes into contact with the outer covering layer.

Next, a second embodiment of the present invention will be described.

6 to 10 are diagrams showing a second embodiment of the cooling material pack according to the present invention. In the second embodiment, the same components as in the first embodiment are given the same reference numerals.

In FIG. 6, reference numeral 31 denotes a cooling material pack.
The first and second ice-containing bags 12A and 12B are connected to the first and second ice-containing bags 12A and 12B respectively through a guide 32 having a flange portion 32a provided at
is connected to. Each water-containing bag 12 also serves as a stopper for closing the opening of the heat-absorbing bag 15. An opening means 20 is attached to each water-containing bag 12 on the side opposite to the endothermic bag 15.
The protective cap 33 is provided so as to cover the push rod 21, the stopper 22, and the water-containing bag 12, and to be locked to the flange portion 32a of the guide 32. When the push rod 21 is pressed, it is guided by a guide 35 and a guide 32 that guide the tip 21a of the push rod 21, and breaks through the water-containing bag 12.
It is opened as shown in the figure, and the water-containing agent 17 and the endothermic agent 13 can be mixed therein. The cooling material pack 31 of the second embodiment has an outer cover N
16 is not provided, but the heat absorbing bag 1
Of course, an outer covering layer 16 may be provided on the outer surface of the heat absorbing bag 15 so as to cover the heat absorbing bag 15, if necessary. Everything other than the above is the same as the first embodiment.

(Effects) As explained above, according to the present invention, the cooling material pack is divided into at least two water-containing bags, and after opening the first ice-containing bag by pushing down the push rod of the opening means, When the second ice-containing bag has passed, the second ice-containing bag is similarly opened, and the water-containing agent and the endothermic agent are mixed to cause an endothermic reaction, thereby greatly increasing the cold storage time during which a suitable cooling sensation is felt. Also,
In addition to gelling and stabilizing the water produced by endothermic reactions, it also absorbs sweat from the human body, giving the skin a smooth, dry feel to the touch.

[Brief explanation of the drawing]

1 to 5 are diagrams showing a first embodiment of the cooling material pack according to the present invention, FIG. 1 is a schematic plan view including a partial sectional view, and FIG. FIG. 3 is a partial sectional view showing the action, and FIG. 4.5 is a partial plan view showing the action. 6 to 10 are diagrams showing a second embodiment of the cooling material pack according to the present invention, FIG. 6 is a schematic plan view including a partial sectional view, and FIG. 7 is a diagram showing ■-■ in FIG. 6. A cross-sectional view in the direction of arrows, Fig. 8 is a partial cross-sectional view showing the effect, and Fig. 9.10
The figure is a partial plan schematic diagram showing the effect. FIG. 11 is a graph showing the relationship between the type of heat absorbing agent and the cooling time in Example 1.2 according to the present invention. 11.31... Cold material pack, 12 (12A
, 12B)... Water-containing bag, 13... Endothermic agent, 14... Polymer water absorbing agent, 15... Endothermic bag, 16... - Outer coating layer, 17... Water-containing agent, 18... Polymer absorbent material, 20, 2OA, 20B... Opening means, 21.
...Push rod (opening means), 22...Stopper (opening means), 23.33
...Protective cap (opening means), 24.32.
35...Guide (opening means). Agent: Patent Attorney Ugagun

Claims (3)

[Claims] (1) At least two water-containing bags, a water-containing agent stored in the water-containing bag and containing water, an endothermic agent that causes an endothermic reaction by reacting with the water in the water-containing agent, and a polymer that absorbs the water generated by the endothermic reaction. A water-absorbing agent, a heat-absorbing bag connected to each water-containing bag and storing the heat-absorbing agent and a polymeric water-absorbing agent, and an opening means attached to each water-containing bag and opening the water-containing bag by pushing it open so that the water-containing agent and the heat-absorbing agent can be mixed. The first water-containing bag of the two water-containing bags is opened by the opening means, and after a predetermined time, the second water-containing bag of the two water-containing bags is opened, and the water-containing agent and the endothermic agent are respectively opened. A cooling material pack that causes an endothermic reaction when mixed. (2) The cooling material pack according to claim 1, wherein the opening means is a push rod that penetrates and opens the water-containing bag from the outside of the water-containing bag. (3) The cooling material pack according to claim 1 or 2, wherein the outer surfaces of the water-containing bag and the heat-absorbing bag are covered with an outer covering layer containing a polymeric water-absorbing agent.