JP2016002140A - Cooling tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling tool capable of retaining an appropriate cooling temperature for a long time without giving unpleasantness if the tool is applied to a desired part of a human body.SOLUTION: The cooling tool is composed of flat bag bodies (A) in which a material (a) with a melting point 5 to 15°C lower than the temperature of a cooled part of a human body is encapsulated, and flat bag bodies (B) in which a material (b) with a melting point lower than that of the material (a) is encapsulated, the flat bag bodies being laminated on one another. The cooling tool is used so that a face of the flat bag body (A) which is opposite to a face on which the flat bag body (B) is laminated faces the cooled part of the human body.

Description

  The present invention relates to a cooling device for cooling a body part.

  Conventionally, a cooling tool in which a regenerator is enclosed in a bag-shaped molded body made of a vinyl chloride resin or a polypropylene resin has been used for cooling the head during heat generation or for sleeping in a hot summer environment. As this cold storage agent, a jelly-like substance obtained by impregnating a water-absorbing resin with an antifreeze or water has been used from the viewpoint of flexibility and adhesion to the body (Patent Document 1, etc.). Since these cooling devices are used after being cooled to 0 ° C. or lower over a predetermined time in a normal freezer or the like, the temperature of the cooling device at the start of use is 0 ° C. or lower and the usage time elapses. As the temperature gradually rises, the temperature of the cooling tool rises to around room temperature in the latter half of use. Therefore, in the initial stage of use, the application site is cooled more than necessary, and since the temperature of the cooling tool rises rapidly, the cooling feeling becomes severe, so that a good feeling of use can be obtained. Have difficulty.

In order to solve the above problems, various techniques using latent heat (endotherm during melting) when a substance undergoes phase transition have been developed. For example, a cooling device in which a microcapsule containing a substance having a melting point of 25 to 35 ° C. as a cold insulator is dispersed in silicone rubber and molded so as to be worn on the body (Patent Document 2), or a hydrophobic having a melting point of 5 to 35 ° C. Known are dispersion particles of an aliphatic polymer, a coolant in which an aqueous medium in which the particles are dispersed is sealed in a bag (Patent Document 3), and the like.
In addition, by using a regenerator pillow that combines a low-melting-point regenerator that is liquid at the time of use and a high-melting regenerator that is in a solid state at the start of use, the cooling effect can be prolonged and flexible. A technology has been developed that secures the above and improves the comfort of use (Patent Document 4).

  Furthermore, solid hydrate solids such as sodium sulfate are filled and sealed, and the body is cooled by absorbing heat from the skin surface, releasing the hydrate into a liquid, refluxing, and releasing heat into the air. The technique of doing is known (patent document 5).

JP 11-253479 A JP 2008-000197 A JP 2004-189999 A JP-A-8-308704 JP-A-7-250860

  However, in the inventions described in Patent Documents 2 to 3, although it is not necessary to cool the coolant in advance, only the latent heat of fusion of the substance used as the coolant contributes to cooling. There is a problem that the cooling effect is low and it does not last for a long time. Moreover, since the invention described in Patent Document 4 has a low melting point near 0 ° C., even a high melting point regenerator has a problem that the body is cooled more than necessary. The invention described in Patent Document 5 has a problem that a large amount of inorganic salt is required, and it takes a long time to return to the original state before use.

  Therefore, the present invention relates to providing a cooling tool that can maintain a cooling temperature that does not cause discomfort to the user for a long time.

  Therefore, the present inventor has made various studies to solve the above problems, and in using a plurality of substances having different melting points, a plurality of flat bags encapsulating each of these substances are stacked, and the body is in use at the time of use. It has been found that by specifying the surface facing the portion to be cooled, a cooling tool capable of maintaining an appropriate cooling temperature for a long time without giving discomfort can be obtained.

That is, the present invention relates to a flat bag body (A) in which a substance (a) having a melting point at a temperature 5 to 15 ° C. lower than that of the body to be cooled is enclosed, and a substance having a melting point lower than that of the substance (a). The flat bag body (B) in which (b) is enclosed is stacked, and among the surfaces of the flat bag body (A), the side opposite to the surface on which the flat bag body (B) is stacked. The present invention provides a cooling tool that is used so that the surface faces the part to be cooled of the body.
The present invention also relates to a method for partially cooling the body, wherein the cooling tool is brought into contact with a portion to be cooled.

  According to the present invention, the cooling tool formed by stacking the flat bag body (A) and the flat bag body (B) is used, and one surface of the flat bag body (A) is the body to be cooled. An appropriate cooling temperature can be maintained for a long time without discomfort by simply placing and contacting the cooling tool so as to face the desired site.

It is the schematic which shows the cross section of the cooling tool of this invention. It is the schematic which shows the cross section of the cooling tool of this invention which accumulated the heat insulator. It is the schematic which shows the cross section of the cooling tool of this invention which coat | covered the heat insulating material. It is the schematic which shows the cross section of the cooling tool of this invention which coat | covered the cooling tool shown in FIG. 2 with the heat insulating material further. It is the schematic which shows the cross section of the cooling tool of this invention which further coat | covered the whole cooling tool shown in FIG. 2 with the heat insulating material. It is a perspective view which shows the flat bag body (A) which connected the some small bag body mutually and integrated. FIG. 6 (a) shows a flat bag body (A) constituted by eight small bag bodies, and FIG. 6 (b) shows a flat bag body (A) constituted by twelve small bag bodies. 1 is a schematic view showing a cross section of a cooling tool 1 of Example 1. FIG. 6 is a schematic view showing a cross section of a cooling tool 2 of Example 2. FIG. 5 is a schematic surface showing a cross section of a cooling tool 3 of Comparative Example 1. FIG. It is a graph which shows the cooling performance of Examples 1-2 and the comparative example 1. FIG. The vertical axis represents temperature (° C.), and the horizontal axis represents elapsed time (minutes).

Hereinafter, the present invention will be described in detail.
In the cooling device of the present invention, the flat bag body (A) and the flat bag body (B) are stacked, and in the flat bag body (A), the temperature is 5 to 15 ° C. lower than the cooled part of the body. A substance (a) having a melting point is enclosed, and a substance (b) having a melting point lower than that of the substance (a) is enclosed in the flat bag body (B).

The melting point of the substance (a) enclosed in the flat bag (A) is 5 to 15 ° C. lower than the cooled part of the body from the viewpoint of maintaining an appropriate cooling temperature for a long time without giving unpleasant feeling, It is preferably 8 to 14 ° C lower.
In addition, the melting point of the substance (a) may vary specifically depending on the application site of the body, but is preferably 20 to 30 ° C, more preferably 21 to 27 ° C.

  The substance (a) enclosed in the flat bag (A) is preferably a chemically stable substance from the viewpoint of withstanding repeated use over a long period of time and safety. Further, from the viewpoint of obtaining an excellent cooling effect and maintaining a constant temperature over a long period of time, a substance having a high latent heat of fusion and a clear melting point is preferable. Specifically, as the substance (a), hydrocarbons such as alkanes, fatty acids having 5 to 20 carbon atoms, fatty acid esters having 5 to 20 carbon atoms, hydroxy ketones, ethers, glycerin fatty acid esters, Examples thereof include one or more selected from fatty acid amides having 5 to 20 carbon atoms, alcohols having 5 to 20 carbon atoms, waxes and the like.

Examples of hydrocarbons such as alkane include n-octadecane (melting point: 28 ° C.), l-phenyl-1-cyclopentene (melting point: 23 ° C.), and the like.
Examples of fatty acids include undecanoic acid (melting point 28 ° C.), 10-undecenoic acid (melting point 24 ° C.), 4-cyclohexylbutanoic acid (melting point 27 ° C.), and the like.
Examples of fatty acid esters include hexadecanoic acid decyl ester (melting point 30 ° C.), butanoic acid-2-butoxyethyl ester (melting point 25 to 27 ° C.), heptadecanoic acid ethyl ester (melting point 28 ° C.), dodecanoic acid dodecyl ester (melting point 28 ° C.). ), Octadecanoic acid butyl ester (melting point: 27 ° C.), and the like.
Examples of hydroxy ketones include 1-hydroxy-5-decanone (melting point: 25 ° C.), 9-hydroxy-2-nonanone (melting point: 23 ° C.), and the like.
Examples of ethers include polyoxyethylene (9) lauryl ether (melting point: 20 to 22 ° C.), polyoxyethylene (10) lauryl ether (melting point: 28 ° C.), (3-phenoxypropyl) benzene (melting point: 28 ° C.), 1- Methoxyundecane (melting point: 25 to 26 ° C.), diphenyl ether (melting point: 28 ° C.) and the like can be mentioned.
Examples of glycerin fatty acid esters include 3- (nonyloxy) propane-1,2 diol (melting point: 29 ° C.).
Examples of fatty acid amides include hexaneamide-N-2-hydroxyethyl acetate (melting point: 27 ° C.).
Examples of alcohols include lauryl alcohol (melting point: 24-27 ° C.), 3- (nonyloxy) -1,2-propanediol (melting point: 29-30 ° C.), 4,5-octanediol (melting point: 26 ° C.), 3-tetra Examples include decanol (melting point: 25 ° C.).
Examples of waxes include coconut oil (melting point: 24 to 27 ° C.) and ostrich oil (melting point: 26 to 28 ° C.).

When two or more kinds of substances are mixed and used as the substance enclosed in the flat bag body (A), the melting points of all the substances are preferably 5 to 15 ° C. lower than the body to be cooled. However, it is not limited to this, The melting | fusing point as the whole enclosed substance (a) should just be 5-15 degreeC lower than the to-be-cooled part of a body. In addition, as the substance (a), it is more preferable to use one kind selected from the substances (a) alone from the viewpoint of having a clear melting point.
Among them, from the viewpoint of withstanding repeated use for a long period of time, safety, obtaining an effective cooling effect, and maintaining a constant temperature for a long period of time, the substance (a) includes lauryl alcohol, polyoxy Selected from ethylene (9) lauryl ether, 4,5-octanediol, butanoic acid-2-butoxyethyl ester, 1-methoxyundecane, 3-tetradecanol, octadecanoic acid butyl ester, and 9-hydroxy-2-nonanone 1 type or 2 types or more are preferable.

  The substance (b) enclosed in the flat bag (B) has a lower melting point than the substance (a) enclosed in the flat bag (A). The melting point of the substance (b) is preferably 5 to 40 ° C. lower than the substance (a) and 10 to 35 ° C. lower than the substance (a) from the viewpoint that an appropriate cooling temperature can be maintained for a long time without giving unpleasant feeling. It is more preferable that the temperature is lower by 20 to 30 ° C. Specifically, although it may vary depending on the melting point of the substance (a), the cooling capacity is sufficient, and it can be easily cooled to a solid state in a freezer or refrigerator room of a home refrigerator before use. From the point which can be performed, it is preferable that it is -20-25 degreeC, it is more preferable that it is -10-20 degreeC, and it is still more preferable that it is -5-15 degreeC.

More specifically, examples of the substance (b) enclosed in the flat bag (B) include water (melting point: 0 ° C.), ethylene glycol (melting point: −13 ° C.), glycerin (melting point: 18 ° C.) and the like. Water is preferred. Further, an aqueous solution in which inorganic salts such as sodium chloride, ammonium chloride, potassium chloride, calcium chloride, and magnesium chloride are dissolved in water; an aqueous solution in which a water-soluble organic solvent such as ethylene glycol and propylene glycol is dissolved; sodium polyacrylate, polyvinyl Examples include an aqueous solution in which a water-soluble polymer compound such as alcohol and carboxymethyl cellulose is dissolved. These may be used alone or in combination with a plurality of substances. Furthermore, you may use a preservative together.
When two or more kinds of substances are mixed and used as the substance (b) enclosed in the flat bag body (B), it is preferable that the melting points of all the substances are lower than those of the substance (a). However, the present invention is not limited to this, and the melting point of the encapsulated substance (b) as a whole may be lower than that of the substance (a). In addition, as the substance (b), it is more preferable to use one kind selected from the substances (b) alone from the viewpoint of having a clear melting point.

  The method for measuring the melting point of the substance enclosed in the flat bag bodies (A) and (B) in the present invention is, for example, a trace melting point measuring device using mercury (manufactured by Yanaco Development Laboratory, trace melting point measuring device MP- J3 etc.) and DSC. In the present invention, when the melting point of a substance has a range, the median value is used as the melting point of the substance.

In the cooling tool of the present invention, of the surfaces of the flat bag body (A), the surface opposite to the surface on which the flat bag body (B) is stacked is opposed to a part of the body that is the cooled portion. It is intended for use. The flat bag body (A) and the flat bag body (B) may be stacked so as to be in direct contact with each other, but from the viewpoint of maintaining the cooling effect for a long time, the flat bag body (A) and the flat bag body (B) It is preferable to stack a heat insulator (C) etc. between.
Examples of the material forming the heat insulator (C) include towels, rubber sheets, foamable rubber sheets, urethane sheets, foamable urethane sheets, foamable phenol sheets, glass wool, rock wool, and foamable polystyrene. In addition, the maximum thickness of the heat insulator (C) is preferably 0.05 to 3 cm, more preferably 0.1 to 2 cm, and more preferably 0.15 to 0.15 in view of maintaining a good cooling effect. More preferably, it is 1 cm.

  The flat bag body (A) and / or the flat bag body (B) preferably covers at least a part of the surface with a heat insulating material from the viewpoint of maintaining the cooling effect for a long time. Moreover, even if it is a case where the surface of a flat bag body (A) and / or a flat bag body (B) is coat | covered with a heat insulating material, the body which is a to-be-cooled part among the surfaces which a flat bag body (A) has. Only the surface facing the part may be exposed without being covered with the heat insulating material, and the exposed surface may be in direct contact with a part of the body that is the part to be cooled. Especially, the surface on the opposite side to the surface on which the flat bag body (A) is stacked among the surfaces of the flat bag body (B) can be covered with a heat insulating material from the viewpoint of maintaining the cooling effect for a long time. preferable. As a heat insulating material, the thing similar to the material which forms a heat insulating body (C) is mentioned.

The maximum thickness of the flat bag body (A) in the present invention is preferably 0.5 to 5 cm from the viewpoint of obtaining an effective cooling effect and maintaining an appropriate cooling temperature for a long time. It is more preferably 1 to 4.5 cm, and further preferably 1.5 to 3 cm.
The surface area of the flat bag (A) may vary depending on the part of the body that is the part to be cooled. For example, when the part to be cooled is the back of the head, it does not cause discomfort and maintains an appropriate cooling temperature for a long time. from the viewpoint of, preferably a 300～1500Cm ^2, more preferably 450～1200Cm ^2, and further preferably from 500~800m ^2.

The maximum thickness of the flat bag (B) in the present invention is preferably 1 to 12 cm from the viewpoint of obtaining an effective cooling effect and maintaining an appropriate cooling temperature for a long time. It is more preferable that it is 10 cm, and it is still more preferable that it is 3-7.5 cm.
The surface area of the flat bag body (B) is preferably the same as that of the flat bag body (A) in terms of cooling efficiency and maintaining an appropriate cooling temperature for a long time.

  The mass ratio (A / B) between the flat bag body (A) and the flat bag body (B) in the present invention is from the point of obtaining an effective cooling effect and maintaining an appropriate cooling temperature for a long time. 0.1 to 2, preferably 0.2 to 1, more preferably 0.3 to 0.5.

The material forming the flat bag body (A) in the present invention is preferably polyethylene, polypropylene, polyethylene terephthalate resin, vinyl chloride resin, nylon resin from the viewpoint of flexibility and solvent resistance. One kind selected may be used alone, or a composite material composed of a plurality of materials may be used.
The material forming the flat bag (B) in the present invention is preferably polyethylene, polypropylene, vinyl chloride resin, nylon resin, acrylic resin, polycarbonate from the viewpoint of impact resistance and solvent resistance. One kind selected from materials may be used alone, but a composite material composed of a plurality of materials may be used.

  In the flat bag body (A) in the present invention, a substance (a) having a melting point at a temperature 5 to 15 ° C. lower than that of the body to be cooled may be enclosed as it is. As shown in FIGS. 6 (a) to 6 (b), a plurality of flat bag bodies (A) in which the substance (a) is sealed are connected while maintaining the integrity, in order to improve the followability to the unevenness. It is preferable to form a flat bag (A) by dividing the package into a plurality of packages, or by connecting a plurality of packages containing the substance (a) in a plane and integrating them, or rounding corners. It is preferable to form the flat bag body (A) by enclosing the substance (a) in a plurality of parcels and storing and integrating the parcels in a single parcel without connecting them together. . The size of the parcel is preferably as small as possible in terms of the ability to follow the unevenness of the surface of the cooled portion. However, considering the manufacturing efficiency, if the parcel is rectangular, one side per unit is set to 0. 0. It is preferably 5 to 10 cm, more preferably 1 to 8 cm, and still more preferably 2 to 7 cm. When the parcel is spherical, the diameter per piece is preferably 0.5 to 4 cm, more preferably 0.7 to 3 cm, and still more preferably 1 to 2 cm.

The cooling tool of the present invention can be used to directly or indirectly cool a part of the body that is a portion to be cooled. As a specific method of use, for example, in order to relieve the heat in summer, the cooling tool of the present invention is used as a pillow to cool the back of the head, or the cooling tool of the present invention is arranged inside the bedding or the seat. Examples include a method of cooling the entire body surface or a method of cooling the head by arranging the cooling tool of the present invention inside a helmet, a hat or the like.
The cooling device of the present invention is stored in advance in a household refrigerator or freezer, and the substances (a) and (b) enclosed in the flat bag body (A) and the flat bag body (B) are stored in the cooling tool. It is preferable that these substances are solidified in advance by storing at a temperature lower than the melting point, and the cooling tool is taken out of the refrigerator or the like before use and used in the manner described above. After use, it can be used repeatedly just by cooling the cooling tool again in the refrigerator, etc., and it can be used many times over a long period of time. It can be used comfortably.

  EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these Examples.

[Production Example 1: Production of flat bag body (A-1)]
500 g of lauryl alcohol was used as the substance (a), which was sealed in a 340 × 200 mm bag made of a storage bag (trade name: Rami Zip AL-24, material: polyethylene terephthalate / polyethylene / aluminum composite film). Further, the inside was heat-sealed to be able to suppress the movement of the liquid and divided into 8 parts to obtain a flat bag body (A-1) having a maximum thickness of 2 cm.

[Production Example 2: Production of flat bag (A-2)]
A flat bag (A-2) having a maximum thickness of 2 cm was produced in the same manner as in Production Example 1, except that 500 g of polyoxyethylene (9) lauryl ether was used as the substance (a).

[Production Example 3: Production of flat bag body (B-1)]
Six commercially available cylindrical cryogens (50 x 40 x 190 mm, contents: 0.5% by weight aqueous solution of carboxymethyl cellulose, content 250 g, bag material: polyethylene) are connected to a flat bag with a maximum thickness of 4 cm A body (B-1) was produced.

[Example 1]
As shown in FIG. 7, a flat bag body (A-1) and a flat bag body (B-1) are used, and aluminum having a thickness of 2 mm and a basis weight of 63.3 g / m ² between both flat bag bodies. After sandwiching the vapor-deposited foamed polyethylene (manufactured by Sanwa Corporation), the whole was covered with a foamed rubber sheet (manufactured by Hikari Co., Ltd.) having a thickness of 5 mm and a basis weight of 890 g / m ^2. Covered. A cooling pillow 1 was produced by covering a part to be cooled with a 2 mm thick cotton pillow cover.

[Example 2]
As shown in FIG. 8, a flat bag body (A-2) and a flat bag body (B-1) are used, and a material sandwiched between both flat bag bodies has a thickness of 5 mm and a basis weight of 1330 g / m ² . A cooling tool 2 was produced in the same manner as in Example 1 except that a rubber sheet (manufactured by Hikari Co., Ltd.) was used with both sides sandwiched between aluminum-deposited foamed polyethylene (same as above) having a thickness of 2 mm and a basis weight of 63 g / m ^2. did.

[Comparative Example 1]
As shown in FIG. 9, a commercially available gel cold pillow (Icenon, manufactured by Hakugen) was used and cooled in advance in a freezer of a household refrigerator at −10 ° C. or lower for 12 hours or longer. Then, the whole thickness of 5 mm, a basis weight of 890 g / m and coated with a ^second foamed rubber sheet (manufactured by light), further thickness 2 mm, a basis weight of 63 g / m ² of aluminum deposited polyethylene foam (Sanwa Corporation Made). A cooling pillow 3 was obtained by covering a portion to be cooled with a 2 mm thick cotton pillow cover.

[Cooling characteristics measurement method]
About the cooling tools 1-3 obtained in Examples 1-2 and the comparative example 1, the cooling characteristic was measured with the following method. In addition, the flat bag body (B-1) in Example 1 and Example 2 and the cold insulation pillow in Comparative Example 1 which had been cooled in advance in a freezer of a household refrigerator at -10 ° C. or lower for 12 hours or more were immediately removed from the freezer. It took out and it was set as the cooling tools 1-3 according to the above.
Each cooling tool is placed on an indoor bed with an air temperature of 27 to 29 ° C. so that the upper surface of the flat bag body (A) is oriented to the cooled side, and the time when the back of the head is placed on it is 0 minute. As a result, the temperature change over time on the surface in contact with the back of the cooling tool was recorded. The results are shown in FIG.

  As is clear from FIG. 10, the cooling devices 1 and 2 of Example 1 and Example 2 show a stable cooling effect with little temperature change, and are 20 to 30 ° C. from the start of use until 5 hours have passed. The temperature was maintained. On the other hand, since the temperature of the cooling tool 3 of Comparative Example 1 suddenly drops to 10 ° C. or less after 30 minutes from the start of use, the back of the head is cooled more than necessary, and the temperature increases significantly as time passes thereafter. Since it rose, the stable cooling effect was not able to be obtained continuously and the usability was also poor.

A: Flat bag (A)
A1: Flat bag (A-1)
A2: Flat bag (A-2)
B: Flat bag (B)
B1: Flat bag (B-1)
C: Insulator (C)
C1: Aluminum-deposited foamed polyethylene C2: Aluminum-deposited foamed polyethylene / rubber sheet / aluminum-deposited foamed polyethylene D: Heat insulation material D1: Heat insulation material 1
D11: Expandable rubber sheet D2: Heat insulation material 2
D21: Cotton pillow cover D33: Aluminum vapor-deposited polyethylene foam X: Gel-like cold insulation pillow

Claims (9)

A flat bag body (A) in which a substance (a) having a melting point at a temperature 5 to 15 ° C. lower than the cooled part of the body is enclosed, and a substance (b) having a melting point lower than that of the substance (a) are enclosed. Of the surfaces of the flat bag body (A), the surface opposite to the surface on which the flat bag body (B) is stacked is A cooling tool for use so as to face the cooling part.   The cooling tool according to claim 1, wherein the melting point of the substance (a) is 20 to 30 ° C.   Substance (a) is lauryl alcohol, polyoxyethylene (9) lauryl ether, 4,5-octanediol, butanoic acid-2-butoxyethyl ester, 1-methoxyundecane, 3-tetradecanol, octadecanoic acid butyl ester, And the cooling tool according to claim 1, wherein the cooling tool is one or more selected from 9-hydroxy-2-nonanone.   The cooling tool according to any one of claims 1 to 3, wherein the melting point of the substance (b) is 5 to 40 ° C lower than the melting point of the substance (a).   The melting point of substance (b) is -20-25 degreeC, The cooling device of any one of Claims 1-4.   The cooling tool according to any one of claims 1 to 5, wherein the substance (b) is water or an aqueous solution obtained by dissolving an inorganic salt, a water-soluble organic solvent or a water-soluble polymer in water.   The cooling tool according to any one of claims 1 to 6, wherein the heat insulator (C) is stacked between the flat bag body (A) and the flat bag body (B).   The substance (a) and the substance (b) are stored at a temperature below the melting point of the substance (a) and the substance (b), so that the substance (a) and the substance (b) are used in a solidified state in advance. The cooling device described.   The body partial cooling method which makes the cooling device of any one of Claims 1-8 contact a to-be-cooled part of a body.