JPS63216564A - Cooling towel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cooling bag using an inorganic substance (hereinafter referred to as a refrigerant) that absorbs heat when dissolved in water. This invention relates to a completely new cooling towel in which a water-retentive material is attached to the towel, and the material is impregnated with water or an evaporative component such as alcohol.

Conventional Technology It is well known that there has been a technology in which refrigerant and water are placed in a synthetic resin bag to form a cooling bag. A cooling bag that is sealed in water and cooled by breaking the water bag when used.

On the other hand, there is a technique in which only a refrigerant is stored in a synthetic resin bag in advance, an appropriate amount of water is poured into the bag at the time of use, and the mouth of the bag is further sealed to form a cooling bag. (Publication name unknown) Problems to be Solved by the Invention The cooling bag made by the earlier prior art contains a composition consisting of water and a refrigerant (hereinafter referred to as the cooling composition) and a container for containing the composition. No method or means has been taken to control the heat generated by the cooling bag from the outside of the bag.
Therefore, thermal energy is casually released, and sometimes the other party to whom the heat is to be transferred (hereinafter simply referred to as the other party) may be given more heat than necessary or may not be given the necessary heat. For example, when a cooling bag according to the prior art is used to cool a fever caused by a cold or an injury, the inorganic material used as a refrigerant dissolves quickly in water. For example, the temperature of the cooling bag will drop rapidly, and if no control measures are taken, the temperature will drop even further, and eventually the cold sensation will turn into a painful sensation, and the bag may become unusable. In such cases, separate insulation material (dry towel, handkerchief, etc.)
It also has drawbacks that must be prepared for.

On the other hand, a cooling bag using a refrigerant that has a slow dissolution rate in water has the disadvantage that it takes time to generate heat to the required temperature, which is not enough time for urgent use.

Furthermore, the biggest drawback of the conventional technology is that in both cases, the usable thermal energy is limited to
It is only the energy of the refrigerant sealed in one cooling bag.

Means for Solving the Problems The present invention eliminates the drawbacks of the prior art and provides an excellent cooling towel, in which a cooling bag containing a cooling composition is provided with an outer packaging having water-retention properties. If the dissolution rate of the refrigerant used is fast and the temperature of the cooling bag drops too much, the outer packaging material is used as a heat insulating material (thermal insulation material). If the fall of the evaporative component is slow, the amount of heat given to the other party ( When the amount of heat required by the other party is small (indicating that the temperature difference between the cooling bag and the other party is small), the evaporative component impregnated in the outer packaging material absorbs the heat of the other party and evaporates.
The temperature of the cooling composition does not increase significantly, and therefore there is less consumption of refrigerant (the dissolved concentration of refrigerant is proportional to temperature).

On the other hand, if the other party requires a large amount of thermal energy (if there is a large temperature difference between the cooling bag and the other party), the heat of evaporation of the evaporation component and the energy of the refrigerant are used simultaneously, giving a large amount of thermal energy to the other party. The structure consists of a cooling composition (3) sealed in an inner packaging material (1) made of synthetic resin to form a cooling bag (4), Furthermore, the outside of the cooling towel is wrapped with an outer packaging material (2) having water-retaining properties, and the inner packaging material (1) is
If the encapsulated cooling composition has a structure that does not leak to the outside, it is sufficient for its purpose, but when considering usability, workability, economic efficiency, and especially heat sealability, It is desirable to use a synthetic resin film, such as one of polyethylene resin, polypropylene resin, vinyl chloride resin, or a composite material of a film made of these resins. Further, there is no need to specify the shape and size of the cooling bag (4) formed by the inner packaging material (1).
It is completely free to choose.

On the other hand, regarding the cooling composition (3) housed in the cooling bag (4), the main ingredient is water and a refrigerant, and the higher the purity of water, the faster the dissolution rate (comparison with the same refrigerant);
Also, if a large amount of refrigerant is dissolved (however, this theory applies only when the substance dissolved in water is an electrolyte substance), but if the viscosity is increased (the electrolyte separates or solidifies the same type of substance) (if a thickener is used), the rate of refrigerant dissolution will be slow.

The water used in the present invention is not particularly specified.
Water, which is generally used as drinking water, is stored in a small bag (hereinafter simply referred to as a water bag) made of a synthetic resin film that can be easily torn open with a finger or the like from the outside.

Next, the refrigerants used in the present invention include sodium hydroxide, potassium hydroxide, sodium nitrate, potassium nitrate, hydrate of atrium sulfate, ammonium nitrate, ammonium sulfate, urea, hydrate of barium hydroxide, and hydrate of magnesium chloride. However, if substances other than the above are confirmed in the future, the use of such substances will not be refused. do not have.

On the outside of the cooling bag (4) containing the cooling composition (water bag and refrigerant) (3) described in detail above, an outer packaging material (2
) may be attached to either one side or the entire surface of the cooling bag (4).

It is sufficient to consider the case in which the present invention will be used and to adopt a method suitable for the purpose of use, and there are no particular limitations. Further, even if the inner packaging material (1) and the outer packaging material (2) are integrally processed from the beginning of use by pasting (for example, lamination) or the like, the present invention will not be impeded.

Next, regarding the material of the outer packaging material (2), considering the purpose of the present invention, it is desirable to use a material that can retain as much of the evaporated components as possible. Materials that may drip onto the surface must be excluded. For example, materials that are considered to be able to achieve desirable usage conditions include cotton cloth, nonwoven fabric, paper, and sheet-like porous materials (silica gel, activated carbon, etc.), but are not limited thereto.

Regarding the evaporative component to be impregnated into the outer packaging material (2) thus formed, firstly, it is desirable that it be a liquid due to the structure of the outer packaging material (2) and the purpose of the cooling towel of the present invention;
Water or alcohol (ethyl alcohol) is desirable, especially water with a large latent heat is the most ideal when considering things such as absorbing a large amount of heat when evaporating and thirdly safety. It seems to be a substance.

The basic parts of the cooling towel of the present invention have been described in detail above, but in order to be able to use the cooling towel immediately at any time and in any place, it is necessary to add water to the outer packaging material (2). This must be contained in a container (6) made of a material that is at least impermeable to water vapor, and a method must be taken in which the container can be easily opened and closed.

Also, regarding the part of controlling the dissolution rate of the refrigerant and thus controlling the temperature of the cooling towel by increasing the viscosity of the water in the cooling composition (3), as already mentioned above,
Instead of increasing the viscosity of water, a porous material (5) is enclosed in the packaging material (1) at the same time as the cooling composition (3), and the material absorbs water to stop the movement of water. Therefore, it is possible to control the dissolution rate of the refrigerant, and examples of porous materials include continuous foam polyethylene, continuous foam urethane, silica gel, activated carbon, wood powder, Koreo light, and fired materials. You can give hill stones and other things.

Example 1 In the first example, a polyethylene film with a thickness of 50 microns was used as the material for the inner packaging material (1), and the size was 150 mm x 100 mm.
A bag with a size of mm is molded, while a bag with a thickness of 15 microns,
A polyethylene film coated with vinylidene chloride resin was used to form a water bag containing 50 cc of water (tap water), and 50 g of 10 hydrate of sodium sulfate as a refrigerant.
As a porous material, three pieces of foamed urethane with a size of 130 mm x 80 mm x 8 mm were placed in the previous bag and sealed to form a cooling bag (4), and the material was made of No. 100 flannel (cotton). The outer packaging material (2) is used to form a bag, the cooling bag (4) is included in the bag, and the outer packaging material (2) is impregnated with water to the extent that it does not ooze out even when lightly pressed with a finger. Incidentally, the cooling towel was subjected to a heat generation test indoors at a temperature of 32°C and a humidity of 65% (the test conditions for all examples below are the same), and the lowest temperature on the surface of the cooling towel was 21°C. ℃, the time required to drop to the lowest temperature was approximately 7 minutes, the duration of the lowest temperature was approximately 35 minutes, and the time required for the surface temperature of the cooling towel to rise to 28 degrees Celsius was approximately 65 minutes.

Second example, 40 g of calcined vermiculite as porous material (5)
, and a nonwoven fabric with a thickness of 1 mm was used as the outer packaging material (2), except that they were the same as in the first embodiment.

The third example was carried out in the same manner as the first example except that 60 g of ammonium nitrate was used as the refrigerant. The duration is approximately 12 minutes, and the surface temperature is 2.
The time required to raise the temperature to 8°C was 38 minutes.

The fourth example is the first except that 50 g of urea is used as the refrigerant.
The test was carried out in the same manner as in the example, and the test results showed that the minimum temperature was 19°C, the duration of the minimum temperature was 30 minutes, and the time until the surface temperature rose to 28°C was about 50 minutes.

The cooling towels in the fifth example, the first, third and fourth examples were sealed with a material made by laminating polyethylene resin to a 20 micron thick aluminum foil and a 10 micron thick aluminum foil at a temperature of 50°C and a humidity of 50°C. 30% in a constant temperature room below 50%
After leaving it for several days, the heat generation test was conducted again.
It was possible to obtain results completely similar to those of Examples 3 and 4.

The present invention can be carried out as described above, and is a technology that could never be seen in the conventional technology. By combining the above two new technologies with the conventional technology, which involves attaching an outer packaging material (2) containing an evaporative component to the outside of the bag (4), the following excellent characteristics are derived. (1) By sealing a porous material (5) (particularly solid material) inside the cooling bag (4), water from the water bag that is torn during use can be absorbed. When the cooling towel is stationary, the water inside is absorbed into the small pores of the porous material (5) (this is more effective if the inside of the cooling bag (4) is in a vacuum state). No movement takes place. In other words, this meant that the refrigerant that had dissolved into the water was unable to diffuse all the way to Europe.
Only the concentration around the refrigerant becomes abnormally high, and the dissolution rate of the refrigerant slows down.

Next time you need cooling, shake the cooling towel or
Alternatively, if you stir the water inside, the concentration around the refrigerant will drop and it will start to dissolve again and the temperature will start to drop.

(2) By including an evaporative component (water is used in the present invention) in the outer packaging material (2), refrigerant consumption is saved;
Furthermore, this results in an extension of the heat generation time. This is because the energy of the refrigerant can be saved by the amount corresponding to the energy of evaporation heat required for the evaporation component (hereinafter simply referred to as water) to evaporate.
), and the cooling bag (4) supplies heat according to the demands of the water (hereinafter including the outer packaging material (2)) that is in direct contact with the other party. This is already clear from the explanation, and it is also well known that the refrigerant dissolves in proportion to the temperature. That is, the cooling towel is
Immediately after use, the cooling composition (3) is cooled by its own energy, and when a certain temperature is reached, the refrigerant stops dissolving. Next, if the amount of heat demanded by the other party exceeds the heat of evaporation of the water, the water will either ask the cooling bag (4) to supply thermal energy, or if the water has completely evaporated, only the cooling bag (4) will be able to supply it. of thermal energy is consumed.

From abnormalities (1) and (2), it is possible to control heat generation from the outside according to the user's will, and
This is a useful invention that can obtain an appropriate temperature that could not be thought of in the prior art by adding the heat of evaporation of water, and further extend the duration of the appropriate temperature.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of each of the first, third, and fourth embodiments, Fig. 2 is a sectional view of the second embodiment, Fig. 3 is a sectional view of the fifth embodiment, and Fig. 4 is a sectional view of the fifth embodiment.
The figure is a sectional view of another embodiment. (1) Inner packaging material, (2) Outer packaging material, (3) Cooling composition, (4) Cooling bag, (5) Porous substance, (6) Container. (a) Adhesive part.

Claims (5)

[Claims] (1) A cooling composition (
3) is sealed to form a cooling bag (4), and the outside of the bag is further wrapped with an outer packaging material (2) having water retention properties. (2) The cooling composition (3) is a hydrate of sodium hydroxide, potassium hydroxide, sodium nitrate, potassium nitrate, sodium sulfate, ammonium nitrate, ammonium sulfate, urea, barium hydroxide, and water in a separate sachet. thing,
Magnesium chloride hydrate, calcium chloride hydrate,
The cooling towel according to claim 1, which is composed of one or more of boric acid and alum. (3) The cooling towel according to claim 1, wherein the inner wrapping material (1) and the outer wrapping material (2) are integrated. (4) The cooling towel according to claim 1, wherein a porous substance (5) for absorbing and retaining the cooling composition (3) is enclosed inside the inner packaging material (1). (5) The cooling towel according to claim 1, wherein the outer wrapping material (2) is impregnated with an evaporative component and is housed in a container (6).