JP7121636B2 - Cooling bag and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cooling bag and a manufacturing method thereof.

A conventional example of a cooling bag is disclosed in Patent Document 1. The cooling bag disclosed in Patent Document 1 is "a heat-absorbing agent whose specific surface area and dissolution rate in water are reduced by molding a granular raw material into a columnar or agglomerated material, and is used as it is in a water-absorbent synthetic resin or ( and) It is enclosed in a synthetic resin film bag together with a granular heat-absorbing agent that is a raw material, or in an inner bag with small holes.” (Summary of Patent Document 1). When using this conventional cooling bag, 60 ml of tap water at 25° C. is injected through a check valve V into the cooling bag.

Another conventional example of a cooling bag is disclosed in Patent Document 2. A conventional chemical cooler bag or chemical cooling bag disclosed in Patent Document 2 contains a coolant (2) such as ammonium nitrate in an outer bag (1) as shown in FIG. The chemical cooling bag constructed in this way is configured by containing, for example, water in the inner bag (3), which is capable of Water (4) is added to the coolant (2) by rupturing the coolant (2), and the chemical reaction of the coolant (2) produces a cooling effect.” (Patent Document 2, page 2, lines 7-15). ing.

Furthermore, a commercial product called "Hiyaron" (registered trademark) is marketed by the present applicant as an implementation of a cooling bag. (See Non-Patent Document 1)

Japanese Utility Model Laid-Open No. 7-26671 Microfilm of Japanese Utility Model Application No. 54-108589 (Japanese Utility Model Application No. 56-26115)

https://www.lotte.co.jp/products/catalogue/kenko_zakka/02/detail02.html

The cooling bag disclosed in Patent Document 1 has a problem that it is not convenient to use because water (tap water) must be injected into the bag through a check valve provided in the bag when it is used.
In that respect, the cooling bag described in Patent Document 2 and the cooling bag according to the above embodiment are excellent in terms of usability because the inner bag (water bag) can be burst by external pressure when used. be.

However, in a conventional cooling bag that accommodates a powdered chemical (cooling agent) and an inner bag containing water (water bag) in the outer bag, where is the water bag located in the outer bag? It is difficult to determine the position to hit. In addition, since the water bag does not hit the water bag even when hit, the water bag does not break and the chemical does not react with the water. Furthermore, it was found that the powdery medicine in the outer bag absorbs the impact when the outer bag is hit, and sufficient pressure is not transmitted to the water bag, making it difficult to break the water bag.

The present invention has been made to solve such problems, and by applying a predetermined force or more from the outside of the outer bag, the inner bag inside the outer bag is reliably broken, and the endothermic reaction is rapid and rapid. It is a primary object of the present invention to provide an improved reliable cooling bag and a method of manufacturing the same.

In order to achieve the above object, the invention according to claim 1 comprises an outer bag and an inner bag, the outer bag contains a powdered medicine, and the inner bag is a predetermined It is a sealed bag having a size and containing water, which is housed in the outer bag, and when a predetermined force or more is applied from the outside of the outer bag, the above-mentioned In a cooling bag in which the inner bag is broken and the water in the inner bag flows out into the outer bag and is immersed in the drug to cause an endothermic reaction, when force is applied from the outside of the outer bag, the inside of the outer bag The outer bag is provided with a stop portion capable of preventing movement of the inner bag so that the inner bag does not move at a predetermined position of the outer bag. The cooling bag is characterized in that the inner surfaces of the cooling bag have dot-like joining points .

The invention according to claim 2 comprises an outer bag and an inner bag, the outer bag contains a powdered drug, the inner bag has a predetermined size, and the hydration agent is contained therein. A sealed bag containing a predetermined hydrate containing water is housed in the outer bag, and when a predetermined force or more is applied from the outside of the outer bag, the inner bag is opened in the outer bag. When a force is applied from the outside of the outer bag in a cooling bag in which the water of hydration contained in the hydrate in the inner bag is broken and is immersed in the drug to cause an endothermic reaction. In addition, the outer bag is provided with a stop portion capable of preventing movement of the inner bag so that the inner bag does not move within the outer bag, and the stop portion is positioned at a predetermined position of the outer bag, The cooling bag is characterized in that the inner surfaces of the outer bag facing each other have dot-like joining points .

In the invention according to claim 3, the outer bag includes a first sheet, a second sheet having the same size as the first sheet, and the inner surfaces of the peripheral edges of the first sheet and the second sheet. and an accommodation chamber formed between the first sheet and the second sheet, wherein the stop portion is positioned at a predetermined position in the accommodation chamber, the inner surface of the first sheet facing each other and the 3. A cooling bag according to claim 1 or 2, characterized in that the inner surfaces of the second sheet comprise joints joined in dots.

The invention according to claim 4 is characterized in that two or more joint points are provided at intervals narrower than the width of the inner bag, according to any one of claims 1 to 3. The cooling bag described.
In the invention according to claim 5, a first sheet and a second sheet having the same size as the first sheet are prepared, the first sheet and the second sheet are overlapped and the inner surfaces of the three-sided peripheral portions are joined together, In addition, at a predetermined position, the inner surfaces of the first sheet and the second sheet facing each other are joined in a dot-like manner to form an outer bag having an opening at one end edge, and a liquid is inserted into the outer bag from the opening. An inner bag filled with a powdery cooling agent and then sealed with water or a predetermined hydrate containing water having a predetermined size from the opening in the outer bag. and then the opening of the outer bag is joined and closed.

In the invention according to claim 6, the cooling chemical includes ammonium nitrate as a first chemical and urea as a second chemical, the first chemical is first filled from the opening, and then, 6. A method for manufacturing a cooling bag according to claim 5, characterized by filling a second chemical.
The invention according to claim 7 is the method for manufacturing a cooling bag according to claim 6, wherein the step of filling the first agent and the step of filling the second agent are reversed. be.

In the present invention, the outer bag is provided with a stopper that prevents the inner bag from moving within the outer bag when a force is applied from the outside of the outer bag. Therefore, since the inner bag does not move freely within the outer bag, an external force can be accurately applied to the portion of the outer bag in which the inner bag is housed. Then, the inner bag can be reliably broken.
In addition, even if the drug is dispersed around the inner bag, the amount of the dispersed drug is not large, so the external force is applied to the inner bag without being absorbed by the drug, causing the inner bag to break. be done.

Furthermore, in this embodiment, the sizes of the outer bag and the inner bag are appropriately designed, so that the inner bag can be broken by hitting the outer bag, and the inner bag can be easily broken by gripping the outer bag. A load can be applied and the inner bag can be broken.
Moreover, in the present invention, the cooling bag can be manufactured easily without increasing the number of steps.

FIG. 1 is an illustrative plan view showing an example of a cooling bag 10 according to one embodiment of the invention. FIG. 2 is a schematic cross-sectional view of cooling bag 10 of FIG. 1 along arrows II-II. FIG. 3 is a schematic longitudinal sectional view of cooling bag 10 of FIG. 1 along arrows III--III. FIG. 4 is a plan view showing an example of the inner bag 12. FIG. FIG. 5 is an illustrative view showing how the cooling bag 10 is grasped and the inner bag 12 is broken. FIG. 6A is a diagram showing a method of manufacturing the cooling bag 10 of this embodiment. FIG. 6B is a diagram showing a manufacturing method of the cooling bag 10 of this embodiment. FIG. 6C is a diagram showing a method of manufacturing the cooling bag 10 of this embodiment. FIG. 6D is a diagram showing a method of manufacturing the cooling bag 10 of this embodiment. FIG. 7 is a plan view showing a cooling bag outer bag 21 according to a first modification. 8A and 8B show outer bags 22 and 23 according to a second modification, and FIG. 8C is a completed image diagram of cooling bag 10 according to the second modification. 9A, 9B, and 9C are image diagrams of a cooling bag according to a third modification. FIG. 10 is an image diagram of a cooling bag according to a fourth modification.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is an illustrative plan view showing an example of a cooling bag 10 according to one embodiment of the invention. In FIG. 1, the inner bag 12, which is the internal content of the cooling bag 10, is indicated by a dashed line, and the medicine 13 is exemplarily indicated. 2 is a schematic cross-sectional view along arrows II-II of cooling bag 10 of FIG. 1, and FIG. 3 is a schematic longitudinal cross-sectional view of cooling bag 10 of FIG. 1 along arrows III-III. be.

1 to 3, cooling bag 10 includes an outer bag 11, an inner bag 12 contained within outer bag 11, and a drug 13 contained within outer bag 11. As shown in FIG.
The outer bag 11 is, for example, a vertically long rectangle in plan view, and is a closed bag formed by overlapping two resin sheets 14 and 15 with rounded corners and joining the peripheral edges 16 of the sheets.
The outer bag 11 is formed by folding one resin sheet, for example, in two along the lower edge instead of the two resin sheets 14 and 15 superimposed as in this embodiment. , a so-called three-way joint type bag in which the left and right sides and the upper side are joined.

Further, the outer bag 11 is formed with two round-dot joints 17A and 17B, for example, at positions near both sides of the central portion in the longitudinal direction in a plan view. The two junctions 17A and 17B function as stoppers that prevent the inner bag 12 from moving. The joint point 17A is provided at a position slightly inward from the peripheral edge portion 16, that is, at a position slightly inward to the right from the left edge joint portion 16L with a certain gap from the left edge joint portion 16L. In addition, the joint point 17B is provided at a position slightly inside and left of the right edge joint portion 16R with a certain gap from the right edge joint portion 16R. Also, the distance between the two joint points 17A and 17B is narrower than the lateral width of the inner bag 12. As shown in FIG. The two joining points 17A and 17B are formed by, for example, joining the inner surfaces of the resin sheets 14 and 15 by heating and pressurizing them, similar to the joining of the peripheral portion 16 .

In this embodiment, as an example, the outer bag 11 is composed of multiple layers of resin film sheets 14 and 15 having sealant layers laminated on the inner surfaces thereof. As a specific example, for example, the film sheets 14 and 15 are
Outer layer: OPP (20 μm thick biaxially oriented polypropylene film)
Inner layer 1: PE (15 μm thick polyethylene film)
Inner layer 2: VMPET (aluminum-deposited polyethylene terephthalate film with a thickness of 12 μm)
Inner layer 3: PE (15 μm thick polyethylene film)
Innermost layer: LLDPE (linear low-density polyethylene film with a thickness of 50 μm)
It is composed of five layers of resin film sheets 14 and 15 .

The bonding of the peripheral portion 16 and the bonding points 17A and 17B are realized by thermocompression bonding the two resin film sheets 14 and 15 together.
An example of the dimensions of the outer bag 11 is as follows.
The outer bag 11 has a long side of 203 mm, a short side of 133 mm, a width of the peripheral joint portion 16 of 7 mm, joint points 17A and 17B having a diameter of 11 mm in a plan view, and a non-contact between the left joint portion 16L and the joint point 17A. The joint spacing is 12 mm, the non-bond spacing between right edge bond 16R and bonding point 17B is 12 mm, and the (non-bonding) spacing between bonding points 17A and 17B is 73 mm.

FIG. 4 is a plan view showing an example of the inner bag 12. FIG. The inner bag is, for example, a sealed bag formed by folding a rectangular resin film sheet in two and joining the three sides.
An example of the dimensions of the inner bag 12 is as follows.
The long side (horizontal length in FIG. 4) of the inner bag 12 is 105 mm, the short side (vertical length in FIG. 4) is 65 mm, the width of the joint on the upper side is 7 mm, the width of the joint on the left side is 7 mm, The width of the joint on the right side is 10 mm.

As an example, the inner bag 12 contains 40 g of water (tap water).
The inner bag 12 is also formed, for example, from a multi-layered film sheet with a sealant layer laminated on the inner surface. To give a specific example, for example, a film sheet is
Outer layer: PET (12 μm thick polyethylene terephthalate film)
Inner layer 1: PE (15 μm thick polyethylene film)
Inner layer 2: AL (7 μm thick aluminum foil)
Inner layer 3: PE (15 μm thick polyethylene film)
Innermost layer: TAF (coextruded multilayer film with a thickness of 30 μm)
It is made up of five layers of film sheets.

Referring again to FIGS. 1 to 3, medicine 13 is contained in outer bag 11. As shown in FIG. As the chemical agent 13, for example, a powdery or granular agent that reacts with water to cause an endothermic chemical reaction is used. Specifically, as an example, ammonium nitrate and/or urea can be used. In this embodiment, the outer bag 11 contains, for example, 40 g of small particles of ammonium nitrate and 40 g of small particles of urea.

<Function>
As shown in FIG. 1, the cooling bag 10 of this embodiment contains a powdery medicine 13 (ammonium nitrate and urea) and an inner bag 12 in an outer bag 11 . The inner bag 12 contains water (contains water).
When a predetermined force or more is applied from the outside of the outer bag 11, the inner bag 12 breaks inside the outer bag 11, water in the inner bag 12 flows out into the outer bag 11, and the drug 13 is soaked. As a result, an endothermic reaction occurs and the aqueous solution in the outer bag 11 becomes cold.

For reference, the endothermic reaction of urea and water is as follows.
CO( _NH2 ) _{2 +} aq → CO( _NH2 )2aq+Q (heat of dissolution)
Similarly, the endothermic reaction of ammonium nitrate and water is as follows.
_NH4NO3 + _aq → _NH4NO3aq +Q ₍ heat of dissolution)
In any endothermic reaction, Q is a negative value (for example, Q = -14 kj (25 °C) for urea, Q = -25 kj (25 °C) for ammonium nitrate), and the temperature decreases The aqueous solution becomes cold and the cooling bag 10 functions.

<How to use>
A method of using the cooling bag 10 according to the present embodiment will be described with reference to FIG.
The cooling bag 10 of the present embodiment has a vertically elongated rectangular shape in plan view, and the inner bag 12 is accommodated in a portion (for example, an upper half portion) of the rectangular shape near one side in the longitudinal direction. The movement of the inner bag 12 is blocked at two junctions 17A and 17B so that it cannot move downward from the upper half of the outer bag 11, for example.
Therefore, when using the cooling bag 10, as shown in FIG. 5, the upper half portion of the outer bag 11 (the side containing the inner bag 12) is crushed, and the inner bag 12 is broken inside the outer bag 11. .

As a result, the water in the inner bag 12 flows out into the outer bag 11, immersing the drug 13 in it, and causing an endothermic reaction.
The water discharged from the inner bag 12 and the aqueous solution in which the drug 13 is dissolved move freely inside the outer bag 11 through the non-bonded regions regardless of the presence of the bonding points 17A and 17B, so the entire outer bag 11 is cooled. Effectively functions as a bag.

In the above explanation of the method of use, it has been explained that the inner bag 12 is broken inside the outer bag 11 by squeezing the portion of the outer bag 11 containing the inner bag 12 . However, as with the cooling bag that the present applicant has already commercialized, the inner bag 12 may be broken inside the outer bag 11 by strongly hitting the portion of the outer bag 11 in which the inner bag 12 is accommodated. . Even when the inner bag 12 is broken by hitting, the inner bag 12 is prevented from moving from one half of the longitudinal direction inside the outer bag 11, so that the impact of hitting is smooth to the inner bag 12. - 特許庁, and the inner bag 12 is easily broken. In addition, the drug 13 contained in the outer bag 11 is mainly contained in the other half of the longitudinal direction inside the outer bag 11, and the amount of the drug 13 existing around the inner bag 12 is small, so that it can be beaten. The impact is hardly absorbed by the powdery medicine 13, the impact is easily transmitted to the inner bag 12, and the inner bag 12 is easily broken.

<Manufacturing method>
A method of manufacturing the cooling bag 10 of this embodiment will be described with reference to FIGS. 6A to 6D.
First, referring to FIG. 6A, the outer bag 11 is manufactured in which the three sides of the bag are joined and the joining points 17A and 17B are joined by heat sealing. One side (upper side in the drawing) of the outer bag 11 is not heat-sealed and has an opening.
Next, referring to FIG. 6B, the outer bag 11 is filled with powder or granules of ammonium nitrate as the drug 13 through the opened upper side opening.

The drug 13 (ammonium nitrate) to be filled is all accommodated below the outer bag 11 through the non-bonded areas even though the bonding points 17A and 17B are provided.
Further, referring to FIG. 6B, the outer bag 11 is filled with urea powder or granules as the drug 13 through the opened upper side opening.
The drug 13 (urea) to be filled is also accommodated below the outer bag 11 regardless of the existence of the joints 17A and 17B, like ammonium nitrate.

In filling the drug 13 into the outer bag 11, the filling order of ammonium nitrate and urea may be reversed.
Also, depending on the product, the cooling agent 13 may be ammonium nitrate alone or urea alone. Alternatively, another cooling agent may be used.
Next, referring to FIG. 6C, the inner bag 12 is accommodated in the outer bag 11 through the opened upper side opening.

As the inner bag 12, a sealed bag containing water in advance is used. The inner bag 12 accommodated in the outer bag 11 is prevented from moving downward inside the outer bag 11 at junctions 17A and 17B formed on the outer bag 11 and stays in the upper part of the outer bag 11 .
Finally, referring to FIG. 6D, after the inner bag 12 is accommodated, the upper side opening of the outer bag 11 is heat-sealed to form the outer bag 11 as an airtight bag.

<Modification>
FIG. 7 shows an outer bag 21 for a cooling bag according to a first modification. The outer bag 21 may have the dimensions shown in FIG. 7 instead of the dimensions described above, that is, the outer bag 21 having a width of 140 mm, a length of 175 mm, and a distance between the junction points 17A and 17B of 80 mm. In this case, the dimensions of the inner bag are appropriately adjusted according to the dimensions of the outer bag 21 .

8A and 8B respectively show outer bags 22 and 23 for a cooling bag according to a second modification. As shown in FIGS. 8A and 8B, the joint points 17A and 17B formed on the outer bags 22 and 23 may be dot-shaped and triangular in plane view instead of circular and dot-shaped in plane view.
FIG. 8C shows a completed image of the cooling bag 10 using the outer bag 23 of FIG. 8B.
9A, 9B and 9C show image diagrams of a cooling bag according to a third modification.

As shown in FIG. 9A, the outer bag 24 is provided with three joining points 17, and the joining points 17 partition the inside of the outer bag 24 into a left area and a right area. The inner bag 12 may be accommodated in the left area, and the drug 13 may be accommodated in the right area.
Further, as shown in FIG. 9B, the outer bag 25 is provided with three joining points 17, and the joining points 17 divide the inside of the outer bag 25 into a lower area and an upper area. Then, the drug 13 may be contained in the lower region and the inner bag 12 may be contained in the upper region.

Furthermore, as shown in FIG. 9C, the lower region of the outer bag 26 is divided into a lower right region and a lower left region by three junctions 17. As shown in FIG. Then, the drug 13 is accommodated in these lower left and right regions. On the other hand, the upper region of the outer bag 26 may accommodate the inner bag 12 so as to be supported at the uppermost junction 17 .
FIG. 10 is an image diagram of a cooling bag 10 according to a fourth modification. As shown in FIG. 10, the external shape of the outer bag 27 is not rectangular, but is, for example, a planar shape having bulging portions on both left and right sides and a constricted center portion in the left-right direction. A junction point 17 is provided at the constricted portion as required. In this modified example, for example, the medicine 13 is stored in the storage chamber on the left side, and the inner bag is stored in the storage chamber on the right side. At the time of use, if the inner bag 12 in the right storage chamber is broken, the aqueous solution will enter both the left and right storage chambers equally, for example, the cooling bag 10 in a form that is effective for cooling the nape of the neck and above the eyes. can provide.

<Others>
In the description of each of the above embodiments, it was explained that the inner bag 12 inside the outer bag is broken by applying a predetermined force or more from the outside of the outer bag, but at that time the outer bag itself is broken. not a thing For this reason, the thickness, layer structure, etc. of the resin film sheet constituting the outer bag are appropriately selected and designed.
Also, the inner bag 12 has been described as a water bag filled with water (tap water). However, instead of water, the inner bag 12 may contain a hydrate exhibiting a chemical reaction effect similar to that of water.

As an example, it is possible to replace "water" with "inorganic salt hydrate" as the substance to be sealed in the inner bag 12 . The inorganic salt hydrates that can be used are required to be solid and powdery at room temperature, and examples thereof include sodium sulfate decahydrate, sodium sulfate octahydrate, and sodium sulfate dodecahydrate. The inorganic salt portion of the inorganic salt hydrate does not directly react with the drug (ammonium nitrate or urea), and only the water portion (hydration water) separated from the inorganic salt hydrate reacts with the drug. When the inorganic salt hydrate is used, the cooling reaction is not as rapid as when water is used, but the cooling state can be maintained for a long time.

The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims.

10 cooling bag 11, 21, 22, 23, 24, 25, 26, 27 outer bag 12 inner bag 13 drug 14, 15 resin sheet 16 peripheral edge 16L left edge joint 16R right edge joint 17, 17A, 17B joint point

Claims (7)

A sealed bag comprising an outer bag and an inner bag, wherein the outer bag contains a powdered medicine, and the inner bag has a predetermined size and contains water. housed in the outer bag,
When a predetermined force or more is applied from the outside of the outer bag, the inner bag breaks inside the outer bag, and the water in the inner bag flows out into the outer bag and is immersed in the drug, causing an endothermic reaction. in the cooling bag,
The outer bag is provided with a stop portion capable of preventing movement of the inner bag so that the inner bag does not move within the outer bag when a force is applied from the outside of the outer bag ,
The cooling bag is characterized in that the stop portion has a joint point at a predetermined position of the outer bag, where the opposing inner surfaces of the outer bag are joined together in a dot-like manner . It comprises an outer bag and an inner bag, wherein the outer bag contains a powdered drug, the inner bag has a predetermined size, and contains a predetermined hydrate containing water of hydration. is a sealed bag containing is housed in the outer bag,
When a predetermined force or more is applied from the outside of the outer bag, the inner bag breaks inside the outer bag, and the hydrated water contained in the hydrate in the inner bag flows out into the outer bag. In a cooling bag that is immersed in a chemical and causes an endothermic reaction,
The outer bag is provided with a stop portion capable of preventing movement of the inner bag so that the inner bag does not move within the outer bag when a force is applied from the outside of the outer bag ,
The cooling bag is characterized in that the stop portion has a joint point at a predetermined position of the outer bag, where the opposing inner surfaces of the outer bag are joined together in a dot-like manner . The outer bag is
a first sheet;
a second sheet having the same size as the first sheet;
a joining portion joining the inner surfaces of the peripheral edge portions of the first sheet and the second sheet;
a storage chamber formed between the first sheet and the second sheet;
The stopper portion includes a dot-like joining point where the inner surface of the first sheet and the inner surface of the second sheet facing each other are joined at a predetermined position in the storage chamber. 3. The cooling bag according to Item 1 or 2. The cooling bag according to any one of claims 1 to 3 , characterized in that two or more of said joint points are provided at intervals narrower than the width of said inner bag. A second sheet having the same size as the first sheet and the first sheet is prepared, the first sheet and the second sheet are superimposed and the inner surfaces of the three-sided peripheral portions are joined together, and at a predetermined position, the joining the opposing inner surfaces of the first sheet and the second sheet in a dot pattern to form an outer bag having an opening at one edge;
Filling the outer bag with a powdery cooling agent from the opening,
Next, an inner bag having a predetermined size and sealed with water or a predetermined hydrate containing water is housed in the outer bag from the opening,
A method for manufacturing a cooling bag, characterized in that, thereafter, the opening of the outer bag is joined and closed. the cooling agent comprises ammonium nitrate as a first agent and urea as a second agent;
First, the first drug is filled from the opening,
6. The method for manufacturing a cooling bag according to claim 5, wherein the second chemical is subsequently filled. 7. The method of manufacturing a cooling bag according to claim 6, wherein the step of filling the first agent and the step of filling the second agent are reversed.

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