JPS60166375A - Cold producing agent and cold producing mat - Google Patents

Abstract

PURPOSE:A cold producing agent, obtained by filling sodium thiosulfate and nitric acid separately in combination in hollow parts, and capable of generating cold by mixing the above-mentioned materials. CONSTITUTION:A cold producing agent obtained by filling (A) sodium thiosulfate, preferably pentahydrate and (B) ammonium nitrate in combination preferably at 3-6:7-4 weight ratio separately in hollow parts. (C) Urea may be incorporated with either one or both of the components (A) and (B), and water may be used in combination therewith. A matlike hollow closed bag 11 is separated into plural communicable parts by peeling, etc., and the component (A) is filled in a hollow part (A'). The component (B) is filled in a hollow part (B'), and if necessary a capsule 16, capable of being burst, and filled with water is placed in one or more of the hollow parts (A') and (B') to give the aimed cold producing mat.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application This invention relates to a cooling agent and a cooling mat comprising a novel combination of two or more chemical substances.

Conventionally, conventional cooling mats are made by keeping a bag containing cold water or ice, or a bag containing a cold storage material in a refrigerator or freezer for several hours to cool the mat. It has almost never been put into practical use to mix a certain type of material and make it cool and use it as a cooling mat.

C. Purpose This invention was made in the above-mentioned situation, and it is an object of the present invention to provide a cooling agent and a cooling mat made of a combination of a plurality of substances that have a novel cooling effect that is remarkable and easy to obtain. This is the purpose.

2. Structure This invention is a combination of sodium thiosulfate (1) and ammonium nitrate (old), a combination in which urea is added to one or both of these components (1) and (n), or a combination of these and water. The object of the present invention is to provide a cooling agent characterized by comprising a combination of the following.

The refrigerant according to this invention must combine two inorganic substances, sodium thiosulfate (1) and ammonium nitrate (old). This is based on the discovery that a surprising cooling effect can be obtained.

The sodium thiosulfate used in this invention may be an anhydrous salt or a hydrated salt, but a pentahydrate salt is preferable.

The ratio of sodium thiosulfate and ammonium nitrate used is usually 3 to 6:7 to 4 in parts by weight. In this way, a slightly smaller amount of sodium thiosulfate has a greater cooling effect.

Furthermore, when sodium thiosulfate and ammonium nitrate are packed in cooling mats such as those described below, static electricity is generated in the airtight bag of the cooling mat and the powder of these ingredients, causing the powder to become trapped inside the airtight bag. If it sticks to the surface or the seal part, it may cause seal leakage, or it may not be possible to fill it properly.

In order to avoid this phenomenon, it is preferable to add a trace amount of water, for example, several percent or less, to either or both of them.

This invention includes a case where urea is blended with one or both of sodium thiosulfate and ammonium nitrate,
Including urea further enhances the cooling effect. At this time, the weight ratio of sodium thiosulfate or ammonium nitrate to urea is usually 7-4:3-6.

The sodium thiosulfate, ammonium nitrate, and urea used in this invention may be in the form of crystalline powder, lumps, or granules, and there are no limitations on the size of each particle. There is a tendency that the smaller the particle size, the faster the temperature will drop when mixed, but the low temperature holding time will be shorter, and the larger the particle size, the lower the temperature reduction rate will be when mixed, but the low temperature holding time will be longer.

Furthermore, the present invention includes cases in which water is used in combination. The amount of water contained ranges from a small amount to a large amount.

The term "trace amount" refers to the amount contained in sodium thiosulfate as water of crystallization. Also, there is no particular limit to the amount, but
For example, the amount (weight) used is about the same as that of sodium thiosulfate. When combining this water, use sodium thiosulfate (
1), ammonium (II) nitrate, and water may be used by mixing and contacting them at the same time, or by mixing and contacting the king of the two, and then mixing and contacting the remaining layer.

Another object of the present invention is to provide a cooling mat suitable for using such a cooling agent.

The cooling cloak of the present invention is composed of a cloak-like hollow airtight bag, and the hollow interior of the bag is separated into a plurality of pieces by peeling so as to be able to communicate with each other. Here, communication is possible by peeling means that a part of the cloak-like hollow airtight bag is sealed and the hollow interior is divided into a plurality of parts using the sealed part as a boundary, and the welded part can be easily peeled off. This refers to a configuration in which the hollow parts separated by peeling off can communicate with each other. Here, separation into a plurality of sections means at least two or more sections, and may be as many as 10 sections as long as there is no practical problem.

Sodium thiosulfate (1) and ammonium nitrate (■) are separately filled into separate sections inside the hollow interior of this cooling mat. Moreover, urea may be blended into one or both of these components (1) and (II). In addition, if water is to be combined, a rupturable capsule filled with water (e.g. a polyethylene bag filled with water) may be inserted into the compartments filled with sodium thiosulfate (1) and ammonium (II) nitrate (II). , or a separate separate section filled only with water may be provided.

The airtight bag of the cooling mat of this invention is mainly made of water-resistant synthetic resin such as polypropylene, and may have other synthetic resin films laminated on its surface to improve printing characteristics, heat sealability, etc. good. In addition, the seal portion that separates the hollow portion of the airtight bag is laminated with another synthetic resin film or coated to give it peelability so that it can be easily peeled off. Further, this sealing may be performed by a known method such as thermal welding. Furthermore, a polyethylene bag or the like can be used as a rupturable capsule filled with water.

Note that the shape and size of the cooling mat may be appropriately determined depending on the application. For example, to cool the head, 10 cm in height,
The width is 5cII+ and the thickness is about several marks.

When using this cooling mat, you can peel off the peelable seal and mix and contact the entire contents at once, or, for example, first mix sodium thiosulfate (I) and ammonium nitrate (II). Depending on the purpose, various methods of use can be adopted, such as mixing and contacting water in stages after a certain period of time.

Next, this invention will be explained with examples, but this invention is not limited to this invention.

E. Examples Example 1 (i) FIGS. 1, 2, and 3 show a partially cutaway plan view, a schematic sectional view, and a peelable seal portion of an embodiment of the cooling mat of the present invention. An enlarged cross-sectional view of (5) is shown.

The following sheet was used for the airtight bag of cooling mat 1.

As shown in Figure 3, the - side of the polypropylene film (8) is treated to give the sealing part (5) peelability (α0) (for example, paraffin coat, fluororesin coat, etc.), and then that side A polyethylene film (9) with good heat sealability is laminated on the top.
Then, on the other side of this polypropylene film (8), a film (6) made of polyester or vinylidene chloride with excellent printability is printed (7) with the product name, design drawing, mark, explanation, etc. on the - side. ) is laminated on its printed side.

Cut the sheet as described above, overlap the two sheets as shown in Figure 3, and fuse the periphery (4) and sealing part (5) by heat fusion etc. to form two hollow parts (A). (B), and (^) contains sodium thiosulfate (2) (pentahydrate,
(hereinafter referred to as H) 100g (B) was filled with 100g of ammonium nitrate (3) (hereinafter referred to as N). Then, pull the peelable seal part (5) in the direction of the arrow, peel it off, mix it with the mixture, and let it cool at room fJL 25°C. As a result, a cooling-release curve like a in the graph shown in Fig. 6 is obtained. In the first 20 minutes, H and N were melted and liquefied to generate cooling, and the temperature on the surface of the cooling cloak decreased to 5°C. If left to cool as it is, the temperature will rise to 10℃ after about 90 minutes from the beginning, 15℃ after about 150 minutes from the beginning, and about 210℃ from the beginning.
The temperature reached 20℃ in minutes. In this way, slow and soft cooling was achieved.

(ii) FIGS. 4 and 5 show a partially cutaway plan view and a schematic sectional view of a cooling cloak according to another embodiment of the present invention. In this cooling mat, a polyethylene bag capsule (16) filled with 71.4 g of water was inserted into a hollow part (8) filled with 89.3 g of H (12). The hollow part (B') is filled with 89.3 g of N (13). Peel off the peelable seal part (15) in the direction of the arrow to communicate the hollow part (8') and (B'),
Quickly mix H and N with a mash and make a water capsule (16)
When the mixture is ruptured and mixed well, the result is b in Figure 6.
A cooling and cooling curve was obtained.

In other words, the temperature on the surface of the cooling mat suddenly drops to -11°C by cooling, and then when it is left to cool, it takes about 40 minutes to reach 0°C, about 60 minutes to reach 5°C, about 80 minutes to reach 10°C, and 15 minutes to reach 10°C. ℃
It took about 130 minutes.

The above two examples each show a characteristic cooling/cooling curve,
Each can be used depending on the purpose.

Example 2 (i) H59.5g was added to the hollow part (^) of a cooling cloak having a structure similar to that shown in FIG. 1, and N59.5g was added to the hollow part (B).
A mixture of 5 g of urea and 59.5 g of urea (hereinafter abbreviated as U) was charged. When this is cooled in the same manner as in Example 1, a cooling and cooling curve as shown in C in FIG. 7 is obtained. Comparing this curve C with curve a in FIG. 6 in Example 1, it can be seen that the cooling effect is better when U is contained than in Example 1 when U is not contained.

(ii) 59.5 g of N, l! :U59.5
A polyethylene bag capsule (16) filled with 71.4 g of water and 71.4 g of water is inserted into the hollow part (
Bo) was filled with 59.5 g of H. When this cooling mat was cooled in the same manner as in Example 1, a cooling and cooling curve as shown in FIG. 7d was obtained.

Example 3 (i) H5 in the hollow part (8) of the cooling mat 1 shown in FIG.
A mixture of 9.5 g of U and 59.5 g of U is filled into the hollow part (B) with 59.5 g of N, and the sealed part (B) is sealed.
) was peeled off and mixed together. As a result, a cooling release curve as shown in FIG. 8e was obtained.

The room temperature was 22.5℃, but after about 5 to 6 minutes it dropped to -1℃.
The temperature of the mat surface decreases until the temperature reaches 5℃, and then gradually rises.
It took about 20 minutes to reach 5°C, indicating a gradual temperature rise although there was no sudden temperature drop.

This is almost the same cooling and cooling curve as in Example 2 (i).

(ii) Fill the hollow part (8') of a cooling cloak with a structure similar to that shown in Figure 4 with 59.8 g of N, and insert a polyethylene bag capsule containing 71.4 g of water into the hollow part. Part (Bo) was filled with a mixture of 59.5 g of H and 059.5 g. The peelable seal part (5) was peeled off, the N and H+Ui compounds were mixed by mixing, the capsules in the polyethylene bag containing water were ruptured, and the whole was mixed by mixing. As a result, the temperature rose as shown in Figure 8 and reached 15°C in about 100 minutes.

Example 4 (i) U5 in the hollow part (8') of the cooling mat shown in Figure 4.
Fill the hollow space with a mixture of 9.5 g and 59.5 g of N and insert a polyethylene bag containing 71.4 g of water.
Bo) was filled with 59.5 g of H. U, N, and H were mixed by peeling off the peelable seal part (5) to make the hollow part (A') and (Bo) communicate with each other. After the surface temperature of the mat reached 15° C., the water capsule was ruptured and the whole was thoroughly mixed. As a result, a two-stage cooling and cooling curve as shown in g in FIG. 9 was obtained.

In other words, in the first stage, the mat surface temperature reaches 24℃ after about 5 minutes.
The temperature decreased from 16°C to 16°C, and further slowly decreased to 10°C in 90 minutes. Thereafter, the temperature began to rise and reached 15°C after 120 minutes. At this point, water was mixed as described above and the temperature dropped all at once to 5°C, and it took about 30 minutes to rise to 15°C.

(ii) The hollow part (A') of the cooling 77 shown in Figure 4 was filled with 89.3 g of N, and a polyethylene bag capsule containing 71.4 g of water was inserted, and the hollow part (B") was filled with 89.3 g of N. Filled with 89.3 g of H. After tearing off the seal part (15) to connect the hollow part (＾゛) and (Bo), mix N and H, and when the mantle surface temperature reached 10°C. A polyethylene bag filled with water was ruptured and the whole was mixed with water, resulting in a two-stage cooling/cooling curve as shown in FIG.

The mat surface temperature decreased from the room temperature of 24° C. to 4° C. in a few minutes, and then began to rise, reaching 10° C. in about 60 minutes. As a result of water being injected here, the temperature suddenly dropped to -3.5°C, then started to rise, and reached 15°C after about 75 minutes. In this way, the temperature could be maintained at 15° C. or lower for about 130 to 140 minutes from the start of cooling.

Example 5 (i) A water-filled capsule of the same cooling mat as prepared in Example 4(i) was ruptured, and a 1N mixture was mixed with water. As a result, the temperature of the mat surface on the hollow part (Ao) side dropped all at once from the room temperature of 22.5°C to 18°C, and reached 10°C in about 80 minutes. When the temperature reached 12.5°C, the seal part (15) was peeled off and the whole was mixed, and the temperature of the mat surface decreased by about 5°C, and then started to rise. After that, the temperature reached 15℃ in about 80 minutes, and 15℃
It was possible to maintain the following for approximately 170 minutes. The cooling/cooling curve i in this case is shown in FIG.

(ii) Fill the hollow part (8') of the cooling mat (not shown in Figure 4) with a mixture of 59.5 g and 059.5 g of N, and insert a capsule of a polyethylene bag containing 71.4 g of water into the hollow part. Part (B') was filled with 59.5 g of N.

First, a water capsule was ruptured to mix the H+U mixture and water. As a result, the temperature of the cloak surface on the hollow part (A'') side suddenly decreased from the room temperature of 22.5℃ to 12℃,
Thereafter, the temperature rose and reached 10° C. after about 80 minutes, after which the seal part (15) was peeled off and the whole was mixed.
As a result, the temperature on the surface of the cloak dropped from 10°C to -4°C. Thereafter, the temperature rose to 15° C. after about 80 minutes. The cooling and cooling curve j in this case is the 11th
As shown in the figure, the temperature could be maintained at 15° C. or lower for about 160 minutes from the start of cooling.

(iii) Using the same cooling mat as used in Example 3 (ii), the water capsule in the hollow part (^゛) was first ruptured and water and N were mixed. The temperature of the mat surface suddenly decreased from the room temperature of 25°C to 15°C, then started to rise and reached 15°C after about 50 minutes. At that point, peel off the seal part (15) and open the hollow part (B).
When the H+U inside is mixed with the buffalo N, the temperature rises to -7.5℃.
The temperature then started to rise and reached 15°C in 50 minutes. This cooling/cooling curve k is shown in FIG. In this case, the holding time below 15°C was about 100 minutes.

Example 6 (i) N5 in the hollow part (8) of the cooling mat shown in Figure 1.
Fill the hollow part (B) with a mixture of 9.5 g and 59.5 g of U and 59.5 g of N and 5 cc of water, peel off the seal part (5), and mix by stirring the whole. did. In that case, the cooling and cooling curve is β in Fig. 13.
It was shown to. In this case, the temperature on the surface of the cloak decreased from 22.5°C to 3°C in a few minutes, then started to rise, and rose to 15°C.
The following temperature could be maintained for about 140 minutes.

(ii) Fill the hollow part (^) of the cooling cloak shown in Figure 1 with a mixture of 59.5 g of N, 59.5 g of U, and 5 cc of water, and fill the hollow part (B) with 59.5 g of N and 5 cc of water. Filled with a mixture of The seal part (5) was peeled off and the entire mixture was mixed. The cooling/cooling curve in that case is shown in Fig. 13, m. In this case, the temperature of the cloak surface is 2
The temperature decreased from 2.5°C to 2°C in a few minutes, then started to rise, and was able to maintain the temperature below 15°C for about 120 minutes.

Embodiment 7 In Fig. 14, the peelable seal part (25, 25'')
.

A schematic cutaway plan view of a cooling mat (21) having the same structure as shown in FIG. 1 except that it is divided into three sections B'' and C'' is shown.

A" of this mat has H (22) 89.3g 1B"
71.4g of water (26) for C″, N (23) for C″
189.3g was filled. If you tear off the peelable seal part (25, 25') of this mat and rub it, you will see b in Figure 6.
A cooling release curve similar to that shown in Figure 1 was obtained.

As a result, according to the present invention, the temperature of the cooling mat can be lowered to at least around 120°C, and the temperature of the mat surface can be lowered to 15°C.
The temperature can be maintained at 100 to 200 minutes below the temperature. In addition, by changing the mixing method of the cooling agent or adjusting the particle size of the powder on the cooling side, cooling can be performed rapidly and the low temperature holding time can be extended.

As described above, according to the present invention, various cooling processes can be employed depending on the cooling purpose.

[Brief explanation of drawings]

FIGS. 1, 2, and 3 are a partially cutaway schematic plan view, a schematic cross-sectional view, and an enlarged cross-sectional view of a peelable seal portion of an embodiment of the cooling cloak of the present invention, and FIG. FIG. 5 is a partially cutaway schematic plan view and schematic sectional view of another embodiment of the cooling mat of the present invention, and FIG. 14 is a partially cutaway diagram of another embodiment of the cooling mat of the present invention. The schematic plan view and FIGS. 6 to 13 are graphs showing cooling radiation curves by the cooling cloak of the present invention. (1, 11, 21) - one-shot cold cloak, (2, 12, 22
)-sodium thiosulfate, (3,13,23)--ammonium nitrate, (4,14,24)-peripheral seal, (
5,15,25゜25')-Peelable seal part, +61-
Polyester or vinylidene chloride film, (7)-
・Printing department, (8)-polypropylene film, (91-
Polyethylene film, αω-・peelable treated part, (16
)-water-filled capsules, 26-water, and (A, A
', A'', B, B', B'', C'') - Separated and compartmentalized hollow parts. iL1 Commissioner of the Japan Patent Office Waken Wakamatsu 2, Name of the invention Refrigerating agent and cooling mat 3 Name of the person making the amendment Name Sharp Corporation Representative Asahi Saeki 1, Agent 530-5, Date of amendment order 1982 April 24th (shipment date)
5. Subject of correction

Claims (1)

[Scope of Claims] 1. A combination of sodium thiosulfate (1) and ammonium (II) nitrate, a combination of these (I) components and (a combination in which urea is added to one or both of the old components, or a combination of these and A cooling agent characterized by comprising a combination of water. 2. A cooling agent according to claim 1, wherein the weight part ratio of sodium thiosulfate (1) and ammonium nitrate (old) is 3 to 6:7 to 4. Refrigerant. 3. Sodium thiosulfate (1) or 77% nium nitrate (
The cooling agent according to claim 1, wherein the weight part ratio of II) and urea is 7 to 4:3 to 0. 4. The cooling agent according to claim 1, wherein the sodium thiosulfate (1) is pentahydrate. 5. The cooling agent according to claim 1, wherein several percent of water is added to sodium thiosulfate (1) and/or ammonium nitrate (■). 6. Consists of a cloak-like hollow airtight bag, the hollow interior of which is separated into a plurality of parts by peeling so that they can communicate with each other, and the separated hollow interior contains a combination of sodium thiosulfate (I) and ammonium nitrate (II), and a combination of these. (I) component and (n
) A cooling agent consisting of a combination in which urea is added to one or both of the components or a combination of these and water is filled with the (1) component and (II) component separately,
A cooling mat characterized in that a cooling agent can be mixed by peeling and kneading. 7. The cooling mat according to claim 6, wherein water is contained as a rupturable capsule in one or more of the separated hollow interiors. 8. The separated hollow interior has at least three sections,
7. The cooling mat according to claim 6, wherein water is filled in a section different from the section filled with components (1) and (II).