JPH09182764A - Warmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a warmer capable of rising temperature in a short time only by a simple procedure to heat with a microwave oven and conveniently used for warming various parts of the body, by equipping an exhaust means on a bag body into which water absorptive resin is sealed and which keeps the water containing swelling state water absorptive resin on in a closed state up to a specified inner pressure. SOLUTION: A warmer 1 comprises a bag body 2 and small bag body 3, and water absorptive resin 4 is sealed in the bag body 2. The bag body 2 and the small bag body 3 are made of a synthetic resin material, and the small bag body 3 has an open hole to open into the bag body 2, an exhaust hole 7 to open to the outside, and a pass to communicate both holes 6 and 7 with each other. When the warmer 1 is to be used, the water absorptive resin 4 is made contain water to be a water containing swelling body by injecting water through the exhaust hole 7 at first. Then, parts of the open hole 6 and the pass 8 are closed by the swelling force of the water containing swelling body, and, in this state, the warmer 1 is put into a microwave oven and heated to make water in the water containing swelling body steam. The steam is exhausted through the exhaust hole 7 to protect the bag body 2 from bursting, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be used by simply heating it in a microwave oven to keep it warm, and is also suitable for keeping food in supermarkets, convenience stores, lunch boxes, etc. Regarding the ingredients.

[0002]

2. Description of the Related Art A cold insulator (product name: Icenon, etc.) that is used by filling a gel or gelled cold insulator in a bag made of a synthetic resin sheet and freezing or cooling in a refrigerator is widely used. Has been done. On the other hand, as a cooler that eliminates the disadvantages of bulkiness and high weight of this cooler, it is disclosed in Japanese Utility Model Publication No. 63-34659.
There is one disclosed in the publication. In this product, a bag made of a synthetic resin sheet in which a highly water-absorbent resin is sealed is provided with a pipe for injecting water into the bag. This cold insulator is used for injecting water only when it is used, and it is usually a flat vinyl bag and has a characteristic that it is easy to handle.

[0003]

As described above, there are various types of cold insulators in which the water absorbent resin is enclosed in the bag body. However, an example of this type of heat insulator to be used as a heat insulator cannot be found in the past. Absent. By injecting water, the water absorbent resin
It absorbs water and expands into a gel or jelly. When the bag is heated in this state, the gel-like or jelly-like resin is heated, but when the temperature is raised in a microwave oven or the like, the injected water is rapidly vaporized, expanding the internal volume of the bag, Internal pressure rises. Therefore, there is a problem that the bag ruptures in some cases. Therefore, an exhaust means for discharging the vapor inside is required. Therefore, the inventor of the present application has devised a heat retaining tool in which an exhaust means having a simple structure is attached to the bag body.

That is, an object of the present invention is to provide a heat retaining tool having a simple structure which can be easily used as a heat retaining tool only by heating with a microwave oven or the like.

[0005]

In order to achieve the above object, the present invention provides a bag body having a water-absorbent resin enclosed therein,
The heat retaining device is provided with an exhaust means for keeping the water absorbent resin in a closed state in a water-containing swelling state up to a certain internal pressure. More specifically, the heat retaining device according to claim 2 is characterized in that, as the exhausting means, a small bag is provided which is fixed to one end edge side of the bag body and which internally forms a communication passage for communicating the inside of the bag body and the outside side. It is what The heat retaining device according to claim 3 is characterized in that the communication passage has a narrow portion formed in a part thereof. The heat retaining device according to claim 4 is characterized in that a small hole or a small hole group is provided as a specific example of the narrow portion. The heat insulating device according to claim 5, wherein the communication passage is formed by enclosing the sachet made of synthetic resin with a melting line, and the narrow portion is formed on the inlet side of the bag body. Is. According to a sixth aspect of the present invention, there is provided the heat retention device according to any one of the first to fifth aspects, wherein the water absorbent resin is sealed in a water-containing swelling state.

Examples of the water-absorbent resin include synthetic polymers obtained by cross-linking water-soluble polymers such as sodium carboxymethyl cellulose, polyvinyl alcohol, hydroxyethyl polymethacrylate, and polyethylene glycol, which are conventionally known as water-absorbing materials, and self-weight. A water-absorbent resin that absorbs several hundred times more water (for example, trade name "Sunfresh ST500 Sanyo Kasei Co., Ltd.") is used. Various types of resins are known, such as polyacrylate type, polysulfonate type, polyvinyl alcohol / polyacrylate copolymer type, etc.
When the water-absorbent resin is enclosed in the bag in a water-containing swelling state, it may be enclosed together with a core material such as a nonwoven fabric or a shape-retaining material.

The warming tool of the present invention is distributed in the form of a flat bag containing a water-absorbent resin or a water-containing swelling body containing water. In the former case, handling is extremely easy, and a small space can be achieved during storage. The latter is convenient because it is used as it is. The water-containing swelling body of the heat retaining device before heating is prevented from leaking because the exhaust means provided in the heat retaining device has a structure in which it is kept closed until a certain internal pressure. The water-containing swelling body is heated by placing the heat retaining tool in the microwave oven and heating it for an appropriate time, so that the heat retaining tool has an appropriate temperature. In this case, the water in the water-containing swelling body becomes steam and the internal pressure rises. This vapor pressure opens the exhaust means, and only vapor is released to the outside. For this reason,
The internal pressure of the heat insulator does not rise above a certain level.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows one of the concrete examples of the present invention having a simple structure in which a pouch is provided as an exhaust means.
The heat retaining tool 1 is composed of a bag body 2 whose peripheral edge is closed, and a pouch 3 which is fixed to the one edge side, and a water absorbent resin 4 is enclosed in the bag body 2. The bag body 2 and the pouch 3 are made of a synthetic resin material. The pouch 3 is formed by sealing the both side edges and forming the communication passage 5 inside. The communication passage 5 communicates the inside and outside of the bag body 2, and the pouch 3 of this example has an opening hole 6 that opens inside the bag body 2, an exhaust hole 7 that opens outside, and both holes 6. It consists of a straight passage 8 etc. that connects 7 to each other.

Next, a method of using the heat retaining tool 1 will be described. First, by injecting water from the exhaust hole 7 of the pouch 3, the water-absorbent resin 4 contains water and becomes a water-containing swelling body 9 as shown in FIG. Thereby, for example, the portion of the pouch 3 inserted into the pouch 2 is pressed against the inner wall side of the pouch 3 as shown in the drawing, and the opening hole 6 of the pouch 3 and the passage 8 in the pouch 2 are closed. . It should be noted that FIG. 2 is an example, and it goes without saying that the portion of the pouch 3 inserted into the bag body 2 may be held in a state in which the opening hole 6 and the passage 8 are closed while being kept in a neutral state. . In any case, the expansion force of the hydrous swelling body 9 closes a part of the opening hole 6 of the pouch 3 and the passage 8 in the bag body 2. Therefore, the water-containing swelling body 9 does not leak from the exhaust hole 7.

Next, as shown in FIG. 3, the heat retaining tool 1 in the state shown in FIG. 2 is placed in the microwave oven 10 and heated. Although the water-containing swelling body 9 is heated by heating, the water contained therein becomes the steam 11 and raises the internal pressure of the bag body 2. Due to this vapor pressure, the closed apertures 6 and passages 8 are expanded and a gap through which the vapor 11 can flow is formed. The steam 11 passes through this gap and is discharged from the exhaust hole 7 to the outside. Therefore, the pressure increase in the bag body 2 is suppressed within a certain range, and there is no danger of the bag body 2 bursting due to heating. As described above, the heat retaining tool 1 is heated to an appropriate temperature and functions as a heat retaining tool.

The exhaust means of the heat retaining device may have a simple structure such as the pouch 3 shown in FIG. 1, but the communicating passage 5a serves as a means for more reliably maintaining the exhaust means in a closed state up to a constant internal pressure. The one with a narrow space is adopted. FIG. 4 shows one of the specific examples. This heat retaining device 1a is shown in FIG. 1 except for the structure of the pouch 3a.
The heat insulation tool 1 has the same structure as that of the heat insulation tool 1 and is denoted by the same reference numeral. The pouch 3a is formed by closing the other edge except the edge having the exhaust hole 7a exposed to the outside, and the pouch 3a inserted into the bag body 2 has a small hole as the narrow portion. 12 are provided. The small holes 12 are composed of a large number of small holes to form a small hole group. The small hole 12 communicates with the exhaust hole 7a through the passage 8a inside.

With the above structure, the exhaust hole 7a of the pouch 3a
Water is introduced into the bag 2 through the passages 8a and the small holes 12 by injecting water from it, and the water-containing swelling body 9 is formed in the same manner as the heat retaining tool 1 described above. Three
The passage 8a of a is closed. On the other hand, by heating the heat retaining tool 1a, the passage 8a is pushed open through the small holes 12 by the vapor pressure of the vapor 11, and the vapor 11 is discharged from the exhaust hole 7a. As described above, like the heat retaining tool 1, the heat retaining tool 1a is heated to an appropriate temperature and functions as a heat retaining tool.

FIG. 5 shows another example of the pouch according to the present invention. The small bag 3b has a small hole 13 provided at an end edge 14 facing the exhaust hole 7b, and the small hole 13 communicates with the exhaust hole 7b through a passage 8b. The small hole 13 functions as a narrow portion of the communication passage 5b, and has almost the same function as that shown in FIG.

FIG. 6 shows a pouch 3 having a communication passage 5c formed by melting lines 15 and 16 obtained by heating a pouch made of a synthetic resin material.
c. As shown in the figure, the communication passage 5c is formed by forming a narrow portion 17 on the inlet side in the bag body 2 which is narrower than other portions, and forming a streamlined passage 18 in the middle portion. By forming the passage 18, water can be injected into the bag body 2 more smoothly, and the narrow portion 17 acts to suppress the discharge of the steam 11 so that the water-containing swelling body 9 can be held up to a certain internal pressure. The effect of making the function of can be more reliable can be enhanced. In addition, 7c shows an exhaust hole in the figure.

FIG. 7 shows a pouch 3d in which a communication passage 5d having almost the same function as in FIG. 6 is provided. Also in the case of this example, the narrow portion 19 is formed on the inlet side in the bag body 2, and the passage 20 having a bellows-shaped contour is formed in the middle portion. From the above, it is possible to perform a function substantially similar to that of the communication passage 5c in FIG. Incidentally, 7d in the figure indicates an exhaust hole.

The shape of the pouch as the exhaust means is not limited to the above, and the shape of the narrow portion is not limited to the above-mentioned examples. For example, the pouch 3 may be configured so that the entire pouch 3 fits inside the bag body 2 as shown in FIG. Further, in the above description, the pouch 3 is used as the exhaust means.
However, for example, a welding line as shown in Utility Model Registration No. 3012514 is formed on the bag body 2 itself, and the bag body itself is made to function as an exhausting means. May be provided.

Next, specific examples of the present invention will be described. (Example 1) Nylon 15 μm / Linear low density polyethylene (LLDPE) 40 μm 180 mm × packaging material
A valve-equipped bag having the structure shown in FIGS. 1 to 3 was prepared with a size of 300 mm. 10 g of super absorbent resin (Sunfresh ST500) is put in this bag through a valve (small bag).
Then, 1000 cc of water was added and gelation was performed to prepare a heat retaining tool. A microwave oven (high frequency output 500
When heated at W) for 5 minutes, the gel at the center of the bag was heated to 45 ° C. without rupturing the bag. The heating test was repeated 100 times, and similar results were obtained.

(Example 2) 100 parts by weight of sodium carboxymethyl cellulose, 100 parts by weight of concentrated glycerin, and 80 parts by weight of pigment were dissolved in 1000 parts by weight of water to obtain 10 parts by weight.
Made 00 g of gel. This was housed in the same valve-equipped bag as in Example 1 to prepare a heat retaining device. When this heat-retaining device was heated in a microwave oven (high-frequency output of 500 W) for 5 minutes, the gel in the center of the bag was 4 without bursting.
Warmed to 5 ° C. In addition, 1 such heating test
Repeated 00 times with similar results.

(Comparative Example 1) A heat retaining tool having the same structure as that of Example 1 was prepared except that the valve was not provided and the structure was sealed.
When the same heating test as in Example 1 was conducted, the bag swelled and the seal part was peeled off.

(Comparative Example 2) A heat retaining tool having the same structure as in Example 2 was prepared except that the valve was not provided and the structure was sealed.
When the same heating test as in Example 2 was performed, the bag body swelled and the seal portion peeled off.

[0021]

According to the present invention, the following remarkable effects are obtained. 1) The warming tool of the present invention can be heated to a required temperature in a short time by a simple operation of heating in a microwave oven when needed, and is very conveniently used for keeping warmth of each body part,
The temperature of food can be raised at the same time as the food is heated by a microwave oven in supermarkets, convenience stores, lunch boxes, etc. After that, it can be conveniently used as a warming tool for heated food. 2) Since the contents do not leak from the exhaust means until the internal pressure reaches a constant level, no trouble occurs during distribution. On the other hand, since steam is discharged from the exhaust means during heating, the internal pressure is kept constant and there is no danger. 3) The flat plate-shaped heat retaining tool in a state where the water absorbent resin is not allowed to contain water has good handleability and requires a small storage space. On the other hand, the one in which the hydrous swelling body is enclosed can be used immediately by simply heating it.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a heat retaining device of the present invention in which a pouch is used as an exhaust means.

FIG. 2 is a schematic cross-sectional view showing an example of an internal state of the heat retaining device of FIG. 1 when a hydrous swelling body is formed.

FIG. 3 is a schematic diagram showing a state during heating of the heat retaining tool shown in FIG.

FIG. 4 is a perspective view showing a heat retaining tool having a pouch as an exhausting means using a small hole as a narrow portion.

FIG. 5 is a cross-sectional view showing another example of a pouch using a small hole as a narrow portion.

FIG. 6 is a sectional view showing a sachet having a communication path surrounded by a melting line.

FIG. 7 is a cross-sectional view showing a pouch having a communication passage surrounded by a bellows-like melting line.

FIG. 8 is a perspective view showing another example of the heat retaining tool of the present invention.

[Explanation of symbols]

 1 warming tool 1a warming tool 2 bag body 3 sachet 3a sachet 3b sachet 3c sachet 3d sachet 4 water absorbent resin 5 communication passage 5a communication passage 5b communication passage 5c communication passage 5d communication passage 6 opening hole 7 exhaust hole 7a exhaust hole 7b 7c Exhaust hole 7d Exhaust hole 8 Passage 8a Passage 8b Passage 9 Water-containing swelling body 10 Microwave oven 11 Steam 12 Small hole 13 Small hole 14 Edge 15 Melting line 16 Melting line 17 Narrow portion 18 Passage 19 Narrow portion 20 Passage

Claims (6)

[Claims] 1. A heat retaining device, characterized in that a bag body having a water-absorbent resin enclosed therein is provided with an exhaust means for keeping the water-absorbent resin in a closed state in a water-containing swelling state up to a constant internal pressure. 2. The exhaust means comprises a small bag, and the small bag is fixed to one edge of the bag body and has a communication passage formed therein for communicating the bag body with the outside. Insulated warming equipment. 3. The heat retaining device according to claim 2, wherein the communication passage forms a narrow portion in a part thereof. 4. The heat retaining device according to claim 3, wherein the narrow portion includes a small hole or a group of small holes. 5. The heat retaining device according to claim 3, wherein the communication passage is formed by enclosing the sachet made of synthetic resin with a melting line, and the narrow portion is formed on an inlet side of the bag body. . 6. The heat retaining device according to claim 1, wherein the water-absorbent resin is sealed in the bag in a water-containing swelling state.