JP2012254186A - Cooling pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling pack which enables the coolant condition that the efficiency to a cooling object is favorable, and can extend the duration of a cooling effect.SOLUTION: The cooling pack in which a coolant is stored in the inside of an outer bag formed by a sheet shape member so that cooling is performed by an endotherm action caused by that two or more kinds of materials are mixed, is characterized in that the outer bag storing the coolant has a heat-insulating layer, and a portion of one surface contacting with the cooling object has no heat-insulating layer, and becomes a cooling promoting surface portion in which the cooling is easily performed.

Description

  The present invention relates to a cooling pack in which a cooling agent is used so as to cool by an endothermic effect generated by mixing two or more kinds of substances.

  In the conventional cooling pack, a cooling agent and a water bag containing water are sealed in an outer bag made of a resin member such as a plastic sheet, and the cooling pack is used when a cooling effect is required. The water bag is broken through the outer bag, for example, by hitting it strongly, and the cooling effect is obtained by the endothermic action when the coolant and water are mixed. The coolant reacts with water to become liquid, and the temperature of the cooling pack (liquid) is lowered to about −6 ° C. by the action of endothermic reaction.

  On the other hand, a type of coolant that uses water of crystallization instead of water has already been proposed (see Patent Document 1). This coolant is characterized by mixing strontium hydroxide octahydrate as a salt containing crystal water with an inorganic ammonium salt. Moreover, the salt holding crystal water can be characterized by using sodium metasilicate nonahydrate in combination with strontium hydroxide octahydrate. Further, the inorganic ammonium salt may be one or more selected from ammonium nitrate, ammonium chloride, and ammonium bromide.

  In addition, a cooling pack in which a coolant is put in a water-permeable inner bag (coolant bag) and stored in an outer bag has been proposed. In this cooling pack, a water bag and two or more kinds of coolant that endothermically react with water are sealed and stored in one outer bag, and the water and the coolant endotherm react by cooling the water bag to cool it. In the cooling pack formed so as to have an action, the coolant is housed in a water-permeable coolant bag in a state of being separated for each coolant and housed in the outer bag. (See Patent Document 2). According to this, there is an effect that it is easy to handle by solving the problem that the coolant melts and hardens into a lump according to the outside air temperature.

JP 06-65564 (first page) JP 2005-6687 (first page)

The problem to be solved with respect to the cooling pack is that the conventional cooling pack has not been proposed for maintaining the cooling state efficiently and extending the duration of the cooling effect.
Therefore, an object of the present invention is to provide a cooling pack that enables an efficient cooling state for a cooling target and can extend the duration of the cooling effect.

The present invention has the following configuration in order to achieve the above object.
According to one embodiment of the cooling pack according to the present invention, the coolant is stored in the outer bag formed by the sheet-like member so as to be cooled by the endothermic effect generated by mixing two or more substances. In the cooling pack, the outer bag containing the coolant includes a heat insulating layer having high heat insulating properties, and at least a part of one surface in contact with the object to be cooled is not provided with the heat insulating layer and is cooled. It is an easy cooling promotion surface part.

  Moreover, according to one form of the cooling pack which concerns on this invention, the said outer bag is formed with the said sheet-like member which consists of a resin sheet which is integrally provided with the said foamable heat insulation layer, It is characterized by the above-mentioned. Can do.

  Moreover, according to one form of the cooling pack which concerns on this invention, the said cooling promotion surface part is crushed when the said foamable heat insulation layer is heated and compressed, The said resin which lost this foamable heat insulation layer It can be characterized by being part of the sheet.

  According to the cooling pack according to the present invention, it is possible to achieve an efficient cooling state with respect to the object to be cooled, and to obtain a particularly advantageous effect that it is possible to extend the time during which the cooling effect is achieved.

It is sectional drawing which shows the example of a form of the cooling pack which concerns on this invention. It is a perspective view of the example of a form of FIG. It is a perspective view which shows the other example of a cooling pack which concerns on this invention.

Below, the example of the form of the cooling pack which concerns on this invention is demonstrated in detail based on an accompanying drawing (FIG.1 and FIG.2).
In this cooling pack, the coolant 10 is housed in an outer bag 20 formed by a sheet-like member so as to be cooled by an endothermic effect generated by mixing two or more substances.

The outer bag 20 for storing the coolant 10 includes a heat insulating layer 21 having high heat insulating properties, and at least a part of at least one surface in contact with the object to be cooled does not include the heat insulating layer 21 and is thus easily cooled. It has become.
According to this, while being able to cool a to-be-cooled part appropriately by the cooling promotion surface part 22, the heat insulation layer 21 can prevent useless heat dissipation to the outside, enabling an efficient cooling state for the object to be cooled, and maintaining the cooling effect The time can be extended. In addition, as a cooling object, there exists a to-be-cooled object which needs prevention of corruption, such as a human body and a living thing.

  Moreover, the surface entirely covered with the heat insulation layer 21 can be used as a cooling surface that can cool the cooling target gently. The surface having the cooling promotion surface portion 22 can be used as a cooling surface that can cool the cooling target more rapidly. That is, it is possible to perform cooling with different temperature gradients for the object to be cooled on both the front and back surfaces of the cooling pack. Moreover, since it covers widely with the heat insulation layer 21 except the cooling promotion surface part 22, there also exists an advantage that there is little generation | occurrence | production of dew condensation.

This effect is remarkable in a cooling pack in which the coolant 10 is composed of an inorganic ammonium salt 11 and strontium hydroxide octahydrate 12 as a salt that holds crystal water.
This is overwhelmingly superior in cooling effect produced by mixing strontium hydroxide octahydrate as a salt holding crystallization water with an inorganic ammonium salt as compared with a conventional water bag, It is because it can cool to about -20 degreeC, and when the outer bag 20 does not have the heat insulation layer 21, it will cool a cooling object too much. In addition, when the whole outer bag 20 is provided with the heat insulation layer 21, the cooling rate tends to be too slow. On the other hand, according to the present embodiment, it is possible to efficiently cool at an appropriate speed according to the necessity of the cooling degree related to the cooling target by properly using both sides.

  By the way, in the cooling pack in which the coolant is composed of the inorganic ammonium salt 11 and the strontium hydroxide octahydrate 12 as a salt holding crystal water, the strontium hydroxide octahydrate 12 is contained in the inner bag (internal storage). The bag 13) is stored in a watertight state. When the cooling effect is required, the internal storage bag 13 of the strontium hydroxide octahydrate 12 is destroyed and mixed with the inorganic ammonium salt 11 to obtain a cooling effect by an endothermic reaction. it can. In order to destroy the internal storage bag 13, a strong impact such as folding, twisting or striking may be applied.

The form of the cooling promotion surface portion 22 is not limited to the belt shape as in the embodiment examples of FIGS. 1 and 2, and is constituted by a plurality of exposed portions such as a circular shape (see FIG. 3) and a slit shape, for example. Also good.
Moreover, you may provide the cooling promotion surface part 22 not only in one surface of a cooling pack but in both surfaces. In this case, the cooling promotion surface portion 22 may be provided by changing the form on both sides of the cooling pack, for example, appropriately setting the exposed area. Furthermore, depending on the application, one surface may be entirely used as the cooling promotion surface portion 22.

  In this embodiment, the outer bag 20 is formed of a sheet-like member made of a resin sheet that is integrally provided with a foamable heat insulating layer 21. According to this resin sheet, the surface side on which the foamable heat insulating layer 21 is provided may be the outer surface side of the outer bag 20, and the smooth surface may be the inner surface side of the outer bag 20.

Further, in this embodiment, the cooling promotion surface portion 22 is a part of a resin sheet which is crushed by heating and compressing the foamable heat insulating layer 21 and eliminates the foamable heat insulating layer 21. It can be.
According to this, the outer bag 20 of a desired form can be easily manufactured without using a plurality of material members, and the manufacturing cost can be reduced.

That is, the outer bag 20 made of this resin sheet can be easily manufactured by stacking two resin sheets of the same size and performing heat welding. Further, even after the coolant 10 is added, it can be easily sealed by heat welding. Reference numeral 25 denotes a heat welding portion, which is provided on the outer peripheral portion of the outer bag 20.
According to this, the outer bag 20 can be formed using a kind of resin sheet. Therefore, the manufacturing cost can be reduced as compared with a bag having a structure in which a sheet of another heat-insulating layer is bonded to a sheet of waterproof layer having no water permeability for hermetically storing the coolant.

Reference numeral 30 denotes an adhesive layer, which is provided on one surface of the cooling pack so that it can be attached to a cooling symmetry or a holder for holding the cooling pack. In this embodiment, the cooling promotion surface portion 22 is provided on one surface. Reference numeral 40 denotes release paper, which is provided so as to protect the adhesive layer 30.
According to this, the usability is improved and the usage can be widened.
Furthermore, the pressure-sensitive adhesive layer can be a gel material. According to this gel-like pressure-sensitive adhesive layer, it can function effectively as the heat insulating layer as described above. This gel-like pressure-sensitive adhesive layer can also be provided on a part of at least one surface in contact with the cooling target of the cooling pack to form a heat insulating layer.

  Further, according to the present invention, a water bag and two or more kinds of coolants that endothermically react with water are sealed and stored in one outer bag, and water and the coolant endothermically react by breaking the water bag. Needless to say, the present invention can also be applied to a cooling pack formed so that a cooling action occurs, and an effect equivalent to the above can be obtained.

  Furthermore, the present invention is a type using a water bag, in a cooling pack that is housed in a water-permeable coolant bag (inner bag) in a state of being separated for each coolant and housed in an outer bag. Of course, it is also applicable. In the case of this configuration, there is an effect of delaying the cooling rate because the coolant is not rapidly mixed with water by putting the coolant in the water-permeable inner bag, and the duration of the cooling effect can be further extended.

  As described above, the present invention has been described in various ways with preferred embodiments. However, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. That is.

DESCRIPTION OF SYMBOLS 10 Coolant 11 Inorganic ammonium salt 12 Strontium hydroxide octahydrate 13 Inner storage bag 20 Outer bag 21 Heat insulation layer 22 Cooling promotion surface part 30 Adhesive layer 40 Release paper

Claims (3)

  The cooling agent is a cooling pack stored inside an outer bag formed by a sheet-like member so as to be cooled by an endothermic effect generated by mixing two or more kinds of substances, and the cooling agent is stored in the cooling pack. The outer bag includes a heat insulating layer having high heat insulating properties, and a part of at least one surface in contact with the object to be cooled is a cooling promoting surface portion that is easily cooled without the heat insulating layer. Cooling pack.   The cooling pack according to claim 1, wherein the outer bag is formed by the sheet-like member made of a resin sheet integrally including the foamable heat insulating layer.   The said cooling promotion surface part is a part of the said resin sheet which was crushed when the said foamable heat insulation layer was heated and compressed, and eliminated this foamable heat insulation layer. Cooling pack.

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