JP2013005937A - Warmer for microwave heating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a warmer for microwave heating, which prevents explosive rupture or the like when it is erroneously overheated by microwave heating of a microwave oven, and is to be fitted to various parts of the body.SOLUTION: The warmer for microwave heating includes: a hydrous gel-like heat storage material; a sealed bag which encloses the heat storage material; an inner cover which covers the sealed bag and has a ventilation part for making gas pass through but blocking passing of the heat storage material; and an outer cover which covers the inner cover and has a ventilation part for making the gas pass through but blocking the passing of the heat storage material. The sealed bag includes a synthetic resin base body, and a synthetic resin joining layer interposed and arranged at the peripheral edge part of the synthetic resin base body to join the synthetic resin base bodies with each other. The synthetic resin base body has heat resistance so as not to be thermally deformed even by overheating of the heat storage material, and at one part of the synthetic resin joining layer, a weak joining part where joining strength is thermally weaker than the other normal joining part due to the overheating of the heat storage material is disposed.

Description

  The present invention relates to a heating device for microwave heating including a hydrated gel-like heat storage material heated by microwave heating utilizing the fact that water generates heat by vibration of water molecules by microwave irradiation.

  Heating tools for applying heat to specific parts of the body such as the human body and pets (dogs and cats) include water-containing gel-like heat storage materials and heat storage materials such as polyethylene glycol in sealed bodies such as synthetic resin films and sheets. In general, it has a structure enclosed in a container. For example, Patent Document 1 discloses a heat insulating body in which a heat storage material made of a water-absorbing polymer or a water-containing gel is sealed in a hard resin container. Further, for example, Patent Document 2 discloses a heat storage in which a polyethylene glycol heat storage material is sealed in a thermoplastic synthetic resin sheet. These heat storage materials can be repeatedly heated by an indirect heating method by immersion in hot water or a direct heating method by microwave heating in a microwave oven.

  An indirect heating method by immersion in hot water (a heating method via a heating medium called hot water) is described later in order to put a heat storage material and a heating medium such as water in a container and heat them with heating means such as electricity or gas. Compared with microwave heating, the convenience of heating and the heating efficiency are inferior.

  The direct heating method by microwave heating (heating method in which microwaves directly act on the heat storage material) vibrates water molecules by irradiating microwaves (frequency of 2.45 GHz) in the microwave oven, In this heating method, water molecules are heated by the frictional heat. Since the heating method heats the water-containing gel-like heat storage material using the heat generation of water molecules, it becomes possible to easily and effectively heat / heat the water-containing gel-like heat storage material in a very short time. Yes. Therefore, microwave heating is widely used in general homes and the like as a simple heating method for foods containing moisture.

  In microwave heating, the heating conditions are set appropriately by the heating time of the timer provided in the microwave oven or the output power selection button, etc., but if the heating conditions are exceeded for a long time, the heat storage material will overheat. It becomes a state.

  Long-term microwave heating with a microwave oven does not pose a risk of explosive bursting of the storage body when the heat storage material is heated to the open atmosphere (non-sealed state), but enclosed in a sealed body If the stored heat storage material is erroneously overheated, the sealed body may explode, and the high-temperature heat storage material enclosed in the sealed body may flow out. Explosive bursting surprises the people in the vicinity and causes a problem that the heat storage material enclosed in the sealed body is scattered in the microwave oven.

JP 2011-33300 A JP-A 63-220864

  The heat storage tank disclosed in Patent Document 2 is obtained by sealing polyethylene glycol in a thermoplastic synthetic resin sheet having a melting point of 100 ° C. or higher. Since no special explosion-proof measures are taken for the heat storage tank, if the heat storage tank is accidentally overheated to a temperature exceeding the melting point of the thermoplastic resin sheet, the thermoplastic resin sheet will explode. The high temperature polyethylene glycol encapsulated in the thermoplastic synthetic resin sheet may flow out due to a serious burst or the like, and safety measures are not taken.

  Moreover, the heat insulating body disclosed by patent document 1 seals the thermal storage material in the hard resin container. The heat insulator uses a hard resin container that does not rupture, so it has a safety measure to reduce the risk of rupture. Is uniquely fixed, it does not have the fitting property of closely contacting a predetermined part of the body. That is, there is a problem that the fit to the body is very bad.

  Therefore, the technical problem to be solved by the present invention is that a microwave that can prevent explosive rupture or the like when it is accidentally overheated by microwave heating of a microwave oven and can fit various parts of the body. It is to provide a heating tool for heating.

  In order to solve the above technical problem, the present invention provides the following heating device for microwave heating.

That is, in the heating tool for microwave heating according to claim 1 of the present invention,
A water-containing gel-like heat storage material mainly composed of water;
A sealed bag body in which the hydrated gel heat storage material is enclosed;
Covering the sealed bag body, and an inner cover having a ventilation portion that prevents the passage of the water-containing gel-like heat storage material while allowing gas to pass through,
An outer cover that covers the inner cover and has a ventilation part that prevents the passage of the water-containing gel-like heat storage material while allowing gas to pass through,
The sealing bag body is composed of a synthetic resin base body in the form of a film or a sheet, and a synthetic resin bonding layer that is disposed at a peripheral portion of the synthetic resin base body and joins the synthetic resin base bodies together.
The synthetic resin base body has heat resistance not to be thermally deformed by overheating of the water-containing gel-like heat storage material,
A portion of the synthetic resin bonding layer is provided with a weakly bonded portion that is thermally inferior to other normal bonded portions due to overheating of the hydrogel heat storage material. .

In the heating device according to claim 2 of the present invention,
The bonding width at the weakly bonded portion is narrower than the bonded width at the other normal bonded portion.

In the heating tool according to claim 3 of the present invention,
The bonding strength at the weakly bonded portion is lower than the bonding strength at the other normal bonded portion.

In the heating tool according to claim 4 of the present invention,
The joining is heat welding.

In the heating tool according to claim 5 of the present invention,
The joining is an adhesion.

In the heating tool which concerns on Claim 6 of this invention,
The weakly joined portion is formed at a peripheral edge portion where the periphery and the edge are cut off.

In the heating tool according to claim 7 of the present invention,
In the sealed bag body, the synthetic resin base body is polyethylene terephthalate, polypropylene, or polyamide-based resin, and the synthetic resin bonding layer is a polyethylene resin.

In the heating device according to claim 8 of the present invention,
The outer cover has a heat insulating property.

In the heating tool according to claim 9 of the present invention,
Between the sealing bag body and the inner cover, there is further provided an inner cover having a ventilation portion and a heat insulating property that allows passage of gas but prevents passage of the hydrogel heat storage material. To do.

In the heating device set for microwave heating according to claim 10 of the present invention,
A heating tool for microwave heating according to claim 1,
And a heat-resistant resin container with a lid that houses the heating tool and can withstand microwave heating.

In the heating device set according to claim 11 of the present invention,
The heat-resistant resin container has a vent in the lid and / or the container body, or is configured so that the lid and the container body are loosely engaged.

In the heating device set according to claim 12 of the present invention,
The heat-resistant resin container has a temperature detection display unit for detecting and displaying the temperature in the container in the lid and / or the container body.

  In the present invention according to claim 1, since the sealing bag body has a configuration in which the synthetic resin bonding layer is disposed on the peripheral portion of the film-like or sheet-like synthetic resin base body, the sealing bag body is freely deformed. It can fit in various parts of the body, and if the hydrogel heat storage material is accidentally overheated by microwave heating in a microwave oven, there will be a gap in the weakly bonded part arranged in a part of the synthetic resin bonding layer. The gap becomes a vent hole, and the water vapor generated by the overheating of the water-containing gel-like heat storage material escapes from the gap to the outside ambient environment, allowing the sealed bag body to be degassed. It has the effect of preventing explosive bursting.

  In the present invention according to claim 2, since a long time is required until a gap is formed in the weakly bonded portion when the bonding width is wide, and a gap is formed in a short time in the weakly bonded portion when the bonding width is narrow, The time until the gap is formed (time until degassing) can be adjusted depending on the width. Therefore, there is an effect that the timing of degassing is adjusted by the joining width of the weakly joined portion.

  In the present invention according to claim 3, since the joint strength at the weak joint portion is lower than the joint strength at the other normal joint portion, the weak joint portion may form a gap at an earlier timing than the other normal joint portions. it can. Therefore, there is an effect that the timing of degassing is adjusted by selecting materials having different bonding strengths.

  In this invention which concerns on Claim 4, there exists an effect that the sealing structure of a sealing bag body can be produced stably by using the technique which has already been fully established called heat welding (heat sealing).

  In the present invention according to claim 5, since the most suitable combination of adhesives can be selected from a wide variety of adhesives, there is an effect that the degree of freedom of the degassing temperature is improved.

  In the present invention according to claim 6, when a gap is formed in the weakly joined portion, the inside of the sealed bag body and the outside world communicate with each other.

  Since the present invention according to claim 7 is a technique often used in the field of heat welding (heat sealing), it has the effect of enabling cost reduction and ensuring of stability.

  In the present invention according to claim 8, even when the water-containing gel-like heat storage material is erroneously overheated by microwave heating of a microwave oven, the effect of giving an appropriate warm feeling to the user instead of being too hot. Play.

  The present invention according to claim 9 has an effect of giving a softer warm feeling.

  In this invention which concerns on Claim 10, there exists an effect of preventing the odor transfer in a microwave oven.

  In this invention which concerns on Claim 11, there exists an effect of preventing that the cover of a container removes vigorously with the pressure of the water vapor | steam which flowed out by degassing.

  In this invention which concerns on Claim 12, there exists an effect of alerting a user that the container is high temperature and there exists a danger.

It is a front view of the heating tool for microwave heating concerning a 1st embodiment of the present invention. It is AA sectional drawing of FIG. It is a principal part enlarged view of the heat storage pack with which the hydrogel heat storage material shown in FIG. 1 was enclosed. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a perspective view which shows the state which accommodated the heating tool shown in FIG. 1 in the heat resistant resin container. It is explanatory drawing which shows the usage pattern which wound the heating tool shown in FIG. 1 around the neck. It is a principal part enlarged view of the 1st modification of the heat storage pack with which the hydrogel heat storage material was enclosed. It is DD sectional drawing of FIG. It is EE sectional drawing of FIG. It is a principal part enlarged view of the 2nd modification of the heat storage pack with which the hydrogel heat storage material was enclosed. It is a principal part enlarged view of the 3rd modification of the heat storage pack with which the hydrogel heat storage material was enclosed. It is a perspective view of the heating tool for the microwave heating which concerns on 2nd Embodiment of this invention. It is a disassembled perspective view of the heating tool shown in FIG.

  Below, the heating tool 1 for microwave heating which concerns on 1st Embodiment of this invention is demonstrated in detail, referring FIGS. 1 thru | or 7. FIG.

  FIG. 1 is a front view illustrating a heating tool 1 for microwave heating according to the present invention. In FIG. 1, a heating device 1 covers a heat storage pack (sealed bag body) 10 in which a hydrated gel heat storage material 11 is enclosed, an intermediate cover 3 that covers and covers the heat storage pack 10, and the intermediate cover 3. And an outer cover 5. The middle cover 3 includes a central housing portion 4 having a vertically long and substantially rectangular shape for housing the vertically long heat storage pack 10 in the longitudinal direction, and connecting end portions 7 provided at the left and right ends of the central housing portion 4. I have. The distal end portion of the connecting end portion 7 is provided with a tapered detail 9 having a triangular tapered shape. In the specification of the present application, reference numeral 10 basically refers to a sealed bag body when enclosing the hydrated gel-like heat storage material 11 is not considered, and when considering enclosing the hydrated gel-like heat storage material 11. Indicates a heat storage pack.

  The inner cover 3 can be made of various fabrics such as polyester, polyamide resin, and cotton, but is made of a breathable material such as a synthetic fabric such as polyester, a knitted fabric, or a nonwoven fabric. Further, in order to achieve the purpose of escaping the gas leaked from the heat storage pack 10 to the outside, the inner cover 3 has at least one vent hole in the non-breathable material, even if it is not a breathable material as a whole. It may be an embodiment in which is formed. Furthermore, it is preferable that the inner cover 3 is made of a material having a relatively heat insulating property in order to suppress direct heat conduction. The use of a polyester suede fabric (for example, Teijin's product number: SW3652) for the inner cover 3 is particularly preferable because it provides a rich volume and a smooth feel.

  Since the outer cover 5 is in direct contact with the body part, it is preferable that the outer cover 5 has a heat insulating property such that high heat from the heat storage pack 10 heated to a high temperature does not overheat the body part. It is. The outer cover 5 is made of a breathable material. In order to achieve the purpose of escaping the gas leaked from the heat storage pack 10 to the outside through the inner cover, the outer cover 5 is not made of a breathable material as a whole, but is made of a non-breathable material. It may be an embodiment in which at least one vent hole is formed. The surface is made of natural fiber cotton (100% cotton) with excellent hygroscopicity, the central connecting yarn is a polyamide resin with excellent resilience, and the back is a polyester three-dimensional honeycomb double raschel material (for example, Fukui Knitting) Use of manufactured product number: honeycomb 1000) for the outer cover 5 is particularly preferable because it provides air layer heat insulation and smooth feel due to the honeycomb three-dimensional structure. In addition, this material has a feature that it does not easily lose its shape even after repeated washing and is easy to care for.

  A heat storage pack 10 is housed in the central housing portion 4 of the middle cover 3. The heat storage pack 10 is fixed to the middle cover 3 by sewing, bonding, or heat fusion at a longitudinal orthogonal boundary joint portion 14 to be described later so that the heat storage pack 10 does not shift in the central housing portion 4. is doing. For example, in the embodiment shown in FIG. 1, the attachment portion 24 is sewn to the central longitudinal orthogonal boundary joint portion 14. After the heat storage pack 10 is accommodated in the central accommodating portion 4, the upper and lower openings are closed by sewing, bonding, or heat fusion. For example, in the embodiment of FIG. 1, sewing is performed at the attachment ends 22 at the upper and lower ends. In addition, the attachment part 24 can also be provided in the upper and lower longitudinal orthogonal peripheral joint part 13 or the other longitudinal orthogonal boundary joint part 14.

  A longitudinal peripheral edge joining portion 12 is formed on the left peripheral edge portion of the sealing bag body 10 by heat sealing (heat sealing). For example, the longitudinal peripheral joint 12 prepares a bag base material in which a synthetic resin joint layer 62 is formed on a synthetic resin base body 60 extending in the longitudinal direction of a film or sheet, and the center of the bag base material As a result of bending the portion into two in the longitudinal orthogonal direction and bending it, the side edge ends facing each other are created by heat-sealing (see heat sealing) (see FIG. 4).

  Longitudinal orthogonal peripheral joint portions 13 are formed at the upper and lower peripheral edge portions of the sealing bag body 10 by heat fusion (heat sealing), respectively. In addition, a longitudinal orthogonal boundary joint portion 14 is formed by thermal fusion (heat sealing) at a boundary portion that defines a boundary between adjacent storage chambers 16 (see FIG. 5).

  Therefore, in the sealed bag body 10 shown in FIG. 1, the three longitudinal orthogonal boundary joint portions 14 are divided into four storage chambers 16 and are connected to adjacent storage chambers 16. A water-containing gel-like heat storage material 11 is enclosed in each storage chamber 16. Since the longitudinal orthogonal boundary joint part 14 which connects the adjacent storage chambers 16 is what heat-seal | fuses resin films (heat seal), they become a crease | fold and can deform | transform the whole shape of the heat storage pack 10 freely. Make it possible. These joints 12, 13, and 14 can also be formed by a bonding method using an adhesive instead of heat sealing (heat sealing). In addition, the sealing bag body 10 can be divided and divided into about 2 to 6 miniaturized storage chambers 16. The corner portion of the heat storage pack 10, that is, the longitudinal peripheral joint 12 and the longitudinal direction so that the heat storage pack 10 does not damage the center housing portion 4 of the inner cover 3 when the heat storage pack 10 is inserted into or attached to the center housing portion 4. It is preferable that a rounding process or a chamfering process is performed on a portion where the orthogonal peripheral edge joining portion 13 intersects.

  When the size of the heating tool 1 is illustrated, the total length is about 100 cm and the width is about 5.5 cm. When the size of the heat storage pack 10 folded in half is illustrated, the total length is about 40 cm and the width is about 5.5 cm. When the size of each storage chamber 16 is illustrated, the total length is about 10 cm and the width is about 5.5 cm. Taking the size of the upper and lower connecting ends 7 as an example, the total length is about 30 cm and the width is about 5.5 cm. When the size of the flap part 5 is illustrated, the total length is about 10 cm and the width is about 5.5 cm. Further, for example, each storage chamber 16 is filled with about 40 g of the hydrogel heat storage material 11.

  In this embodiment, as shown in the cross-sectional view of FIG. 2, the heat storage pack 10 is housed in the central housing portion 4 such that the heat storage pack 10 is folded in two and the fold 18 extends in the longitudinal direction. . The folding of the heat storage pack 10 may be a three-stage fold or a four-stage fold. Bending the heat storage pack 10 in a plurality of stages is that more water-containing gel-like heat storage material 11 is contained in each storage chamber 16 than when each storage chamber 16 is divided and divided in advance using a pre-formed fixing portion. The effect of being able to ensure a longer warming holding time can be obtained. Further, since the internal space of the storage chamber 16 is partitioned by the fold line 18, heat convection of the hydrogel heat storage material 11 hardly occurs inside the storage chamber 16, and each of the partitioned storage chambers 16 is a small independent storage section. It can behave like this and the warming holding time can be lengthened. The heat storage pack 10 can be used as it is without being bent.

  As shown in FIGS. 3 to 5, the sealing bag body 10 is a laminated resin film bag in which a synthetic resin base body 60 (for example, a polyamide resin film) and a synthetic resin bonding layer 62 (for example, a polyethylene resin film) are laminated. The body base material is folded and overlapped, the left side and the bottom side are thermocompression bonded (heat-sealed) to form a bag-like body, and the water-containing gel-like heat storage material 11 is sealed in the formed bag-like space. The opening is sealed by thermocompression bonding. The heat storage pack 10 is dimensioned so that it can be inserted into the central housing 4. The portions sealed by thermocompression bonding are the longitudinal peripheral joint portion 12, the longitudinal orthogonal peripheral joint portion 13, and the longitudinal orthogonal boundary joint portion 14 of the sealing bag body 10. For example, the widths of the longitudinal peripheral joint portion 12, the longitudinal orthogonal peripheral joint portion 13 and the longitudinal orthogonal boundary joint portion 14 are approximately 10 mm, approximately 10 mm, and approximately 22 mm, respectively.

  As shown in FIGS. 3 and 4, in the sealed bag body 10, a weakly joined portion 38 is disposed in a part of each longitudinal peripheral edge joined portion 12 corresponding to each storage chamber 16. The other part is a normal joining part 39 where the synthetic resin joining layers 62 are joined over the entire width of the longitudinal peripheral joining part 12. As shown in FIG. 4, the weakly bonded portion 38 is formed by synthesizing the non-bonded portion 30 lacking the synthetic resin bonding layer 62 extending along the longitudinal orthogonal direction (that is, the width direction of the long peripheral edge bonded portion 12). The narrow joint part 31 of the resin joint layer 62 is comprised. According to this configuration, since the narrow joint portion 31 contributes to the joining and the non-joining portion 30 does not contribute to the joining, the joining strength is lower than that of the normal joining portion 39. When the water-containing gel-like heat storage material 11 of the heat storage pack 10 is overheated (for example, about 80 to about 100 ° C.), the synthetic resin bonding layer 62 is thermally softened and / or the bonding strength is reduced. A gap is preferentially formed in the narrow joint portion 31 (weak joint portion 38) having a weaker joint strength. As a result, the gap formed in the narrow joint portion 31 (weak joint portion 38) is a vent hole for releasing high-pressure water vapor generated from the hydrogel heat storage material 11 sealed in the storage chamber 16. It becomes. Therefore, high-pressure water vapor escapes to the outside through the gap between the narrow joint portion 31 (weak joint portion 38), and therefore, the explosion of the heat storage pack 10 can be prevented.

  In addition, in the weak junction part 38, the arrangement | positioning order of the longitudinal junction direction of the narrow junction part 31 and the non-joining part 30 may be reverse to what was shown in FIG. Further, the time until a gap is formed (the time until degassing) can be adjusted by the joining width of the narrow joint portion 31 in the longitudinal orthogonal direction (that is, the width direction of the longitudinal peripheral joint portion 12). The ratio of the width of the narrow joint portion 31 to the width of the non-joint portion 30 in the longitudinal orthogonal direction is, for example, 1: 0.2 to 0.8, preferably 1: 0.4 to 0.6. As a result, the bonding strength at the weak bonding portion 38 is reduced to 0.2 to 0.8, preferably 0.4 to 0.6, that of the bonding strength at the normal bonding portion 39. In addition, as for the joining strength in the normal joining part 39 in normal temperature, a minimum is 10 N / 15mm or more, for example, Preferably it is 15 N / 15mm or more, More preferably, it is 25 N / 15mm or more, More preferably, it is 40 N / 15mm or more. Although an upper limit is not specifically limited, it is 60 N / 15mm or less.

  A synthetic resin base body 60 having high heat resistance and gas barrier properties is suitable as a material in which moisture or vaporized water vapor contained in the hydrogel heat storage material 11 is difficult to permeate and leak over time. The synthetic resin base body 60 having high heat resistance and gas barrier properties has a melting point of 170 ° C. or higher, for example, a biaxially stretched polyamide film, a biaxially stretched polyethylene terephthalate film, a biaxially stretched polypropylene film, A polyethylene terephthalate film or the like on which a silica film or an alumina film is deposited can be suitably used. The thickness of the synthetic resin base body 60 is about 10 to 70 μm, preferably about 20 to 50 μm. Although non-stretched ones can be used, biaxially stretched ones are preferable from the viewpoint of strength and rigidity.

  By the way, although the temperature of the water-containing gel-like heat storage material 11 enclosed in each storage chamber 16 of the heat storage pack 10 rises due to heating of the heat storage pack 10, it is included in the enclosed water-containing gel-like heat storage material 11 as the temperature rises. The water vapor pressure rises. When it reaches a high vapor pressure temperature (approximately 97 to 100 ° C.) near the boiling temperature of water (ie, about 100 ° C.), the vapor pressure of water suddenly increases. Become. As a result, the pressure in the storage chamber 16 in which the hydrated gel-like heat storage material 11 is enclosed is increased at a stretch, and the heat storage pack 10 is expanded. Therefore, the synthetic resin bonding layer 62 having a sufficient bonding strength with the above-described synthetic resin base body 60 is suitable without the softening of the synthetic resin bonding layer 62 at a temperature at which the heat storage pack 10 is to be expanded. .

  As the synthetic resin bonding layer 62, various sealant agents such as low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), unstretched polypropylene (CPP), linear low density polyethylene ( L-LDPE), very low density polyethylene (VLDPE), ethylene / vinyl acetate copolymer (EVA), ethylene / acrylic acid copolymer (EAA), ethylene / methacrylic acid copolymer (EMAA), ethylene / ethyl acrylate Examples thereof include a copolymer (EEA), an ethylene / methyl methacrylate copolymer (EMMA), and an ethylene / methyl acrylate copolymer (EMA). The thickness of the synthetic resin bonding layer 62 is about 20 to 100 μm, preferably about 30 to 80 μm.

Various materials widely used as heat storage agents can be used as the water-containing gel-like heat storage material 11, but a gel-like substance containing a large amount of water in sodium polyacrylate or sodium sulfate decahydrate (Na ₂ SO ₄ · 10H ₂ O) and water (H ₂ O) in an appropriate amount are exemplified as sodium sulfate decahydrate. The hydrogel heat storage material 11 contains about 97 to 99% by weight of water and contains water as a main component.

  The heat storage pack 10 has a plurality of connection forms in which a plurality of subdivided storage chambers 16 arranged in the vertical direction are connected via a longitudinal orthogonal boundary joint portion 14. In the embodiment shown in FIG. 1, four storage chambers 16 are arranged in a line along the longitudinal direction. Further, as shown in FIG. 2, it is preferable that the heat storage pack 10 is accommodated in the central accommodation chamber 4 in a state of being covered with the inner cover 20. As the inner cover 20, a non-woven fabric having air permeability, which is not woven or knitted, is suitable. After creating a web that is a thin sheet-like fiber assembly, a nonwoven fabric is produced by bonding or bonding (chemical bonding, thermal bonding, or mechanical bonding) between fibers in the web by any method. . Therefore, when a non-woven fabric is used as the inner cover 20, it is composed of an irregular (random) crossing structure that does not have a certain regular repeating structure when viewed microscopically, and has a direction with respect to the elongation characteristics. Does not have sex. That is, the inner cover 20 has a characteristic in which the degree of elongation in the vertical and horizontal directions and the degree of elongation in the oblique direction hardly change, in other words, has a substantially isotropic shape stability with respect to the tensile force. The inner cover 20 is made of a breathable material having no hygroscopic property such as polypropylene, polyester, acrylic, rayon, polyamide, or other synthetic fibers. Further, the inner cover 20 may be an embodiment in which a synthetic fabric such as polyester or a knitted fabric is used in a double or triple manner. By interposing the inner cover 20, it is possible to protect the heat storage pack 10 and increase the overall strength of the heating device 1. Further, the inner cover 20 may have a structure provided with at least one small ventilation hole in a non-breathable material. Therefore, the inner cover 20 of the present invention is small enough to prevent the high-temperature water-containing gel-like heat storage material from flowing out even if the water-containing gel-like heat storage material 11 is accidentally overheated by microwave heating of the microwave oven. It has an opening size of air permeability or air holes.

  As shown in FIG. 6, the heating tool 1 described above is preferably heated in a compact state by being folded in multiple stages in the storage space 43 of the heat-resistant resin container 40. That is, since the microwave irradiation distribution in the microwave oven is not necessarily uniform and tends to concentrate in the central portion and the periphery thereof, the heating device 1 is stored in the storage space 43 as compactly as possible and in the center. It is possible to heat the heating device 1 to a uniform temperature as much as possible by arranging it at the part and its periphery.

  The heat-resistant resin container 40 includes a container body 42 and an upper lid 44, and includes a storage space 43 inside the container body 42. A lower engagement portion 45 is formed at the upper edge of the container body 42. An upper engaging portion 46 is formed at the lower edge of the upper lid 44. The lower engagement portion 45 and the upper engagement portion 46 are loosely engaged, and the upper lid 44 of the heat resistant resin container 40 is prevented from being removed with force due to the degassed water vapor pressure. It is also possible to form vents with a small opening size on the side wall surface of the container main body 42 and the wall surface of the upper lid 44 so that the degassed water vapor escapes but the high-temperature water-containing gel-like heat storage material does not flow out. . Since the microwave oven is generally used to heat food, when heating the heating tool 1 in the heat-resistant resin container 40, the upper lid 44 is closed so that the inside of the microwave oven can be used. It is preferable to prevent odor migration.

  Further, a lower gripping portion 47 and an upper gripping portion 48 that protrude outward are provided on the left and right side ends of the container main body 42 and the upper lid 44, respectively, and grip the lower gripping portion 47 and the upper gripping portion 48. This makes it easy to safely carry the heating tool 1 and the heat-resistant resin container 40 heated to a high temperature outside the microwave oven. A temperature detection display unit 49 for detecting and displaying the temperature in the heat-resistant resin container 40 is disposed on the upper wall surface of the upper lid 44. The temperature detection display unit 49 may be disposed on the side wall surface of the container main body 42. The temperature detection display unit 49 is a small thermometer or a thermo label whose color displayed by temperature changes. By installing the temperature detection display unit 49, it is possible to alert the user that the heat-resistant resin container 40 is hot and dangerous.

  The heat-resistant resin container 40 in which the heating tool 1 is stored is placed on a rotating dish of a microwave oven having a rated output of 500 to 700 W, and the heating tool 1 is heated by irradiation with microwaves for a predetermined time. As a result, the heating tool 1 is heated to a temperature suitable for heating a predetermined part of the body. The heating tool 1 heated to a predetermined temperature is taken out from the heat-resistant resin container 40 and wrapped around the user's neck as shown in FIG. 7, and the heat from the hydrogel heat storage material 11 is The sealed bag body 10, the inner cover 20, the middle cover 3, and the outer cover 5 are transmitted to the neck in this order.

  In FIG. 7, each connecting end 7 is inserted through the insertion hole 72 of the ring body 70 using each tapered portion 9 as an introduction portion. The ring body 70 is made of a material that frictionally locks to the connecting end portion 7, for example, a rubber material. By inserting each connecting end 7 into the ring body 70 and lightly engaging it, it is possible to prevent the neck from being accidentally tightened with the wound heating device 1. That is, the connecting end portions 7 can be connected with a weak locking force called a frictional force. In addition, instead of the ring body 70, the structure which latches each connection edge part 7 weakly with a clip may be sufficient. Or it can also be set as the structure which provides a planar engagement body, a hook, etc. in each connection end part 7, and both engage with a weak engagement force.

  Since the plurality of storage chambers 16 including the water-containing gel-like heat storage material 11 are connected via the film-like or sheet-like longitudinal orthogonal boundary joints 14, the heating tool 1 is used with the longitudinal orthogonal boundary joints 14 as folds. Can be bent freely. Therefore, the heating tool 1 as a whole can freely bend and closely adhere to the outer shape of the region to be heated (neck portion in FIG. 7), so that a suitable fit can be provided. The heating device 1 according to the first embodiment is not limited to the above-described heating target portion of the human body (neck portion in FIG. 7), but is wound around various portions such as knees, shoulders, elbows, waists, soles, and the like. Can be used for form. Moreover, it can be used not only for the human body but also for warming pet animals such as dogs and cats.

  The normal heating mode of the heating tool 1 is that the heating tool 1 is housed in a heat-resistant resin container 40, and the water-containing gel-like heat storage material 11 is recommended to be approximately 50 to 65 ° C. in order to prevent burns and low-temperature burns. Microwave heating is performed in a microwave oven by setting the recommended heating conditions so that the temperature is reached (recommended heating time varies depending on the input power of the microwave). However, when microwave-heating the heat-resistant resin container 40 in which the heating tool 1 is stored in a microwave oven, the user incorrectly sets the heating conditions (timer heating time and output power selection button selection). There is a case. If it heats exceeding predetermined heating conditions, the hydrogel heat storage material 11 will be in an overheated state. When the hydrogel heat storage material 11 is overheated by mistake, the vapor pressure of water contained in the hydrogel heat storage material 11 rises, and a high vapor pressure temperature (approximately 97) near the boiling temperature of water (ie, 100 ° C.). Or 100 ° C.), the vapor pressure of water increases at a stretch, and when it reaches 1 atmosphere of the surrounding environment, the water contained in the hydrogel heat storage material 11 is vaporized at a stroke and enters a boiling state. As a result, the pressure in the storage chamber 16 in which the hydrated gel-like heat storage material 11 is enclosed is increased at a stretch, and the heat storage pack 10 is expanded.

  However, when the heating device 1 according to the first embodiment of the present invention is overheated to a dangerous temperature including such a high vapor pressure temperature (for example, about 80 to about 100 ° C.), the synthetic resin bonding layer 62 Due to thermal softening and / or a decrease in bonding strength, a gap is formed preferentially in the narrow joint portion 31 (weakly joined portion 38) disposed in a part of the longitudinal peripheral joint portion 12, and the gap releases water vapor. It becomes a vent hole for this purpose. Water vapor confined in the storage chamber 16 flows out from the gap formed in the narrow joint portion 31 (weak joint portion 38), and the water vapor that flows out of the heat storage pack 10 further flows into the inner cover 20 and the inner cover 3. Then, the outer cover 5 and the heat-resistant resin container 40 flow out in this order, and finally escape to the external ambient environment, so that the heat storage pack 10 can be vented. As a result, it is possible to prevent the heat storage pack 10 from exploding explosively and surprising the people around it, although a small degassing sound called push is produced. Moreover, since all of the inner cover 20, the inner cover 3, the outer cover 5, and the heat-resistant resin container 40 are provided with a small opening size of air permeability or ventilation holes so that the high-temperature water-containing gel-like heat storage material 11 does not flow out, The hydrated gel-like heat storage material 11 does not scatter in the microwave oven.

  Next, a first modification of the heat storage pack 10 in which the hydrated gel heat storage material 11 is enclosed will be described with reference to FIGS. Since the basic configuration of the heat storage pack 10 is the same as that shown in FIG. 3, differences will be mainly described.

  As shown in FIGS. 8 and 9, in the sealed bag body 10, a weakly joined portion 32 is disposed in a part of each longitudinal peripheral edge joined portion 12 corresponding to each storage chamber 16. The other part is a normal joining part 39 in which the synthetic resin joining layers 62 are joined over the entire width of the longitudinal peripheral joining part 12 (see FIG. 10). As shown in FIGS. 8 and 9, the weak joint portion 32 extends over the entire width in the longitudinal orthogonal direction (that is, the width direction of the longitudinal peripheral joint portion 12). The weakly bonded portion 32 is generally composed of a heterogeneous material layer 64 having a thermal property inferior to that of the material of the bonded portion 39. Inferior thermal properties mean that thermal softening and / or reduced bond strength occurs at dangerous temperatures (eg, about 80 to about 100 ° C.). According to the said structure, when the water-containing gel-like heat storage material 11 of the heat storage pack 10 is overheated to a dangerous temperature (for example, about 80 to about 100 ° C.), the soft joint of the weak joint portion 32 and / or the joint strength is reduced. As a result, a gap is formed preferentially in the weak joint portion 32 rather than the normal joint portion 39. As a result, the gap formed in the weakly joined portion 32 becomes a vent hole for releasing high-pressure water vapor generated from the hydrogel heat storage material 11 sealed in the storage chamber 16. Therefore, high-pressure water vapor escapes to the outside through the gaps in the weakly joined portion 32, so that the heat storage pack 10 can be prevented from exploding.

  The first modification is characterized by a material approach in which the material used for the weak joint portion 32 is different from the other normal joint portions 39 in thermal characteristics. In other words, the material used for the weakly bonded portion 32 is configured to cause thermal softening and / or a decrease in bonding strength at a lower temperature than the material used for the other normal bonded portions 39. The temperature difference between the weakly bonded portion 32 and the other normal bonded portion 39 that causes thermal degradation is about 5 to 25 ° C., and preferably about 10 to 20 ° C. In other words, the weak joint portion 32 is configured such that thermal degradation occurs due to a temperature difference on the low temperature side of about 5 to 25 ° C. (preferably about 10 to 20 ° C.) compared to the other normal joint portions 39. More preferably, the bonding strength hardly decreases at a temperature of about 100 ° C. at the temperature of about 100 ° C., whereas the bonding strength greatly decreases at a temperature of about 80 ° C. (The temperature difference between the weak joint portion 32 and the other normal joint portion 39 is about 20 ° C.). It is preferable that the temperature difference between the weakly bonded portion 32 and the other normal bonded portion 39 is small. However, when the temperature difference is as small as several degrees Celsius, the thermal material characteristics of the materials are dramatically different from each other. There are not so many combinations, and options are limited in consideration of manufacturing variations and uneven heating due to a microwave oven. When the temperature difference becomes large, even when the quasi-superheated state (for example, about 70 ° C.) before being heated to a dangerous temperature (for example, about 80 to about 100 ° C.) is reached, the bonding at the weakly bonded portion 32 is dissociated and the gas Since the punched hole is formed and thereafter cannot be used as a heating tool, the original usability of the heating tool 1 is deteriorated. Due to thermal deterioration, the bonding strength at the weakly bonded portion 38 extending in the longitudinal orthogonal direction is usually 0.2 to 0.8, preferably 0.4 to 0.6, of the bonding strength at the bonded portion 39. It is configured to decrease.

  As the heterogeneous material layer 64, various sealant agents and adhesives can be used. The sealant agent used in the weakly bonded portion 32 is the sealant agent described in the first embodiment and has a thermal property inferior to that used in the synthetic resin bonding layer 62. Various adhesives can be used for the weakly bonded portion 32. For example, polyurethane, polyester, epoxy, polyacryl, polyvinyl acetate, and cellulose are suitable. It is.

  Next, a second modification of the heat storage pack 10 in which the hydrated gel heat storage material 11 is enclosed will be described with reference to FIG. Since the basic configuration of the heat storage pack 10 is the same as that shown in FIG. 3, differences will be mainly described.

  As shown in FIG. 11, in the sealed bag body 10, a part of the longitudinal orthogonal boundary joint portion 14 disposed between the adjacent storage chambers 16, the upper storage chamber 16, and the lower storage chamber 16 are respectively provided. A weakly joined portion 38 is disposed on each of the adjacent parts of the longitudinally orthogonal peripheral joint portion 13 disposed adjacent thereto. The other part is a normal joining part 39 where the synthetic resin joining layers 62 are joined over the entire width of the longitudinal orthogonal boundary joint 14 and the longitudinal orthogonal peripheral joint 13. As shown in FIG. 11, the weakly bonded portion 38 is missing the synthetic resin bonding layer 62 extending along the longitudinal direction (that is, the width direction of the longitudinal orthogonal boundary bonded portion 14 and the longitudinal orthogonal peripheral bonded portion 13). The non-joining portion 33, the narrow joint portion 34 of the synthetic resin joining layer 62, and the non-joining portion 33 lacking the synthetic resin joining layer 62 are configured.

  According to this configuration, since the narrow joint portion 34 contributes to the joining and the two non-joining portions 33 do not contribute to the joining, the joining strength is lower than that of the normal joining portion 39. When the water-containing gel-like heat storage material 11 of the heat storage pack 10 is heated to a dangerous temperature (for example, about 80 to about 100 ° C.), the synthetic resin bonding layer 62 is thermally softened and / or the bonding strength is reduced. A gap is preferentially formed in the narrow joint portion 34 (weak joint portion 38) whose joint strength is weaker than that of the joint portion 39. As a result, the gap formed in the narrow joint portion 34 (weakly joined portion 38) is a vent hole for releasing high-pressure water vapor generated from the hydrogel heat storage material 11 sealed in the storage chamber 16. It becomes. In the longitudinal orthogonal boundary joint portion 14, the adjacent storage chambers 16 communicate with each other through a weak joint portion 38 as a gas vent hole. In addition, in the longitudinal orthogonal peripheral edge joining portion 13 on the upper end side and the lower end side, the upper chambers 16 and the lower chambers 16 communicate with the outside through weakly joined portions 38 as gas vent holes. Therefore, all of the gaps of the narrow joint portion 34 (weakly joined portion 38) communicate with each other, and high-pressure steam escapes to the outside through the gap of the communicated narrow joint portion 34 (weakly joined portion 38). Ten explosive bursts and the like can be prevented.

  In the weakly joined portion 38, the arrangement in the longitudinal direction of the narrow joint portion 34 and the non-joint portion 33 is not limited to that shown in FIG. Arranged on the side of the storage chamber 16 to have one narrow junction 34 and one non-joint portion 33, or arranged on the side of both the upper and lower storage chambers 16 with two narrow junctions 34. Or a configuration having two narrow joints 34 and one non-joint part 33 (that is, the arrangement relationship between the narrow joint part 34 and the non-joint part 33 is reversed from that shown in FIG. 11). You can also. Note that the ratio of the total width of the narrow joint portions 34 to the width of the non-joint portions 33 in the longitudinal direction is, for example, 1: 0.2 to 0.8, preferably 1: 0.4 to 0.6. is there. As a result, the bonding strength at the weak bonding portion 38 is reduced to 0.2 to 0.8, preferably 0.4 to 0.6, that of the bonding strength at the normal bonding portion 39.

  Next, a third modification of the heat storage pack 10 in which the hydrated gel heat storage material 11 is enclosed will be described with reference to FIG. Since the basic configuration of the heat storage pack 10 is the same as that of the first embodiment shown in FIG. 3 and the first modification shown in FIGS. 8 to 10, differences will be mainly described.

  As shown in FIG. 12, in the sealed bag body 10, a part of the longitudinal orthogonal boundary joint 14 disposed between the adjacent storage chambers 16, and the upper storage chamber 16 and the lower storage chamber 16 are respectively provided. A weakly joined portion 35 is disposed on each of the adjacent parts of the longitudinally orthogonal peripheral joint portion 13 disposed adjacently. The other part is a normal joining part 39 where the synthetic resin joining layers 62 are joined over the entire width of the longitudinal orthogonal boundary joint 14 and the longitudinal orthogonal peripheral joint 13. As shown in FIG. 12, the weakly joined portion 35 extends along the longitudinal direction (that is, the width direction of the longitudinal orthogonal boundary joint 14 and the longitudinal orthogonal peripheral joint 13).

  The weakly joined portion 35 formed in each of the longitudinal orthogonal boundary joint portion 14 and the longitudinal orthogonal boundary joint portion 13 is different from the material of the normal joint portion 39 in that the thermal characteristics are inferior, as in the first modified example. It is composed of a material layer 64. Inferior thermal properties mean that thermal softening and / or reduced bond strength occurs at dangerous temperatures (eg, about 80 to about 100 ° C.). According to the said structure, when the water-containing gel-like heat storage material 11 of the heat storage pack 10 is overheated to a dangerous temperature (for example, about 80 to about 100 ° C.), thermal softening of the weak joint portion 35 and / or reduction of joint strength is achieved. As a result, a gap is preferentially formed in the weak joint portion 35 rather than the normal joint portion 39. As a result, the gap formed in the weakly joined portion 35 becomes a vent hole for releasing high-pressure water vapor generated from the hydrogel heat storage material 11 sealed in the storage chamber 16. In the longitudinal orthogonal boundary joint portion 14, the adjacent storage chambers 16 communicate with each other through a weak joint portion 35 as a gas vent hole. In addition, in the longitudinal orthogonal peripheral edge joining portion 13 on the upper end side and the lower end side, the storage chamber 16 on the upper end side and the storage chamber 16 on the lower end side communicate with the outside through a weak joint portion 35 as a gas vent hole. Therefore, since all of the gaps of the weakly joined portion 35 communicate with each other and high-pressure steam escapes to the outside through the gap of the communicated weakly joined portion 35, an explosive rupture of the heat storage pack 10 can be prevented. Note that, due to thermal degradation, the bonding strength at the weakly bonded portion 35 extending in the longitudinal direction is 0.2 to 0.8, preferably 0.4 to 0.6, of the bonding strength at the normal bonded portion 39. It is comprised so that it may fall.

  Also in the third modification, various kinds of sealant agents and adhesives similar to those in the first modification can be used as the different material layer 64.

  Next, a heating tool 50 for microwave heating according to a second embodiment of the present invention will be described with reference to FIGS.

  The heating tool 50 for microwave heating which concerns on 2nd Embodiment is used in the aspect which heats a heating object site | part from the bottom like a rug. In FIG. 14, the heating tool 50 includes a heat storage pack (sealed bag body) 10 in which the hydrated gel heat storage material 11 is enclosed, an upper middle cover 52 and a lower middle cover 53 that cover the heat storage pack 10, An upper outer cover 54 and a lower outer cover 55 that cover the middle cover 3 are provided.

  The upper and lower middle covers 52 and 53 are preferably non-woven fabrics that are not woven or knitted but have air permeability. After creating a web that is a thin sheet-like fiber assembly, a nonwoven fabric is produced by bonding or bonding (chemical bonding, thermal bonding, or mechanical bonding) between fibers in the web by any method. . Therefore, when a non-woven fabric is used as the inner covers 52 and 53, it is composed of an irregular (random) cross structure that does not have a regular repeating structure when viewed microscopically, and has an extension property. Has no directionality. In other words, the middle covers 52 and 53 have characteristics in which the degree of elongation in the vertical and horizontal directions and the degree of elongation in the oblique direction are almost the same, in other words, have a substantially isotropic shape stability with respect to the tensile force. The inner covers 52 and 53 are made of a breathable material having no moisture absorption, such as synthetic fibers such as polypropylene, polyester, acrylic, rayon, and polyamide. Moreover, the inside covers 52 and 53 may be an embodiment in which synthetic fabrics and knitted fabrics such as polyester are used in a double or triple manner. By interposing the intermediate covers 52 and 53, it is possible to protect the heat storage pack 10, increase the overall strength of the heating device 1, and provide auxiliary heat insulation. Further, the middle covers 52 and 53 may have a structure provided with at least one small ventilation hole in a non-breathable material. Therefore, even if the water-containing gel-like heat storage material 11 is mistakenly heated by microwave heating of the microwave oven, the middle covers 52 and 53 have small openings so that water vapor escapes but the high-temperature water-containing gel-like heat storage material does not flow out. It is sized for breathability or ventilation.

  Since the upper and lower outer covers 54 and 55 are in direct contact with the body part, the upper and lower outer covers 54 and 55 have heat insulating properties so that the high heat from the heat storage pack 10 heated to a high temperature does not overheat the body part. It is preferable that The outer covers 54 and 55 can be made of various fabrics such as polyester, polyamide-based resin, and cotton, but are made of a breathable material such as a synthetic fabric such as polyester, a knitted fabric, or a nonwoven fabric. In order to achieve the purpose of escaping the gas leaked from the heat storage pack 10 to the outside through the inner covers 52, 53, the outer covers 54, 55 are made of a breathable material as a whole, even if they are not made of a breathable material. It may be an embodiment in which at least one vent hole is formed in a blank material. The outer covers 54 and 55 are the polyester suede fabric described in the first embodiment (for example, Teijin's product number: SW3652) and the honeycomb three-dimensional double raschel material (for example, Fukui knitted product number: honeycomb 1000). Can be used. The upper and lower outer covers 54 and 55 can be made of the same material or different materials. A configuration using the same material contributes to a reduction in the number of parts and a manufacturing cost, and a configuration using different materials has an effect of providing two different warm feelings with one heating tool 50. That is, when the material side of the honeycomb three-dimensional structure double raschel is arranged on the user side, the warm feeling can be made soft, and when the polyester suede fabric side is arranged on the side opposite to the user, the warm feeling can be made hard.

  The heat storage pack 10 used for the heating device 50 is substantially the same as that of the first embodiment described above, and two heat storage packs 10 are arranged side by side. The heat storage pack 10 includes a longitudinal peripheral joint 12 extending in the longitudinal direction, a longitudinal orthogonal peripheral joint 13 extending in the longitudinal orthogonal direction, a longitudinal orthogonal boundary joint 14 extending between the adjacent storage chambers 16 and extending in the longitudinal orthogonal direction, It has. Each joining part 12, 13, and 14 heats the bag base material 10 of the laminated resin film which laminated | stacked the synthetic resin base body (for example, polyamide-type resin film) and the synthetic resin joining layer (for example, polyethylene resin film). It is created by fusing (heat sealing). In each storage chamber 16, a hydrogel heat storage material 11 containing water as a main component is enclosed, as in the first embodiment described above. The longitudinal peripheral joint 12 and the boundary portion of the two heat storage packs 10 arranged in parallel can be used as a fold when the heating tool 50 is folded in the container 40 and heated in a microwave oven.

  As shown in FIG. 14, as in the first embodiment described above, in the sealed bag body 10, a portion of each longitudinal peripheral edge joint portion 12 corresponding to each storage chamber 16 has a missing synthetic resin joint layer. A weakly bonded portion 38 composed of a bonded portion 30 and a narrow and narrow bonded portion 31 in which the synthetic resin bonding layers are bonded to each other is disposed. The other part is a normal joint part 39 in which the synthetic resin joining layers are joined over the entire width of the longitudinal peripheral joint part 12. According to this configuration, since the narrow joint portion 31 contributes to the joining and the non-joining portion 30 does not contribute to the joining, the joining strength is lower than that of the normal joining portion 39. When the water-containing gel-like heat storage material 11 of the heat storage pack 10 is overheated to a dangerous temperature (for example, about 80 to about 100 ° C.), thermal softening and / or decrease in bonding strength of the synthetic resin bonding layer occurs. A gap is preferentially formed in the narrow joint portion 31 (weak joint portion 38) having a weaker joint strength than the portion 39. As a result, the gap formed in the narrow joint portion 31 (weak joint portion 38) is a vent hole for releasing high-pressure water vapor generated from the hydrogel heat storage material 11 sealed in the storage chamber 16. It becomes. Therefore, high-pressure water vapor escapes to the outside through the gap between the narrow joint portion 31 (weak joint portion 38), and therefore, the explosion of the heat storage pack 10 can be prevented.

  In addition, in the weak junction part 38, the arrangement | positioning order of the longitudinal junction direction of the narrow junction part 31 and the non-joining part 30 may be reverse to what was shown in FIG. In the example shown in FIG. 14, the number of storage chambers 16 and weakly joined portions 38 is three, but the number is not limited to three, and eight according to the application site of the heating device 50. It can be increased or decreased within a range. Moreover, the structure of the weak junction part 38 in the thermal storage pack 10 may be what was demonstrated as the 1st modification in the 1st Embodiment mentioned above, a 2nd modification, and a 3rd modification.

  A heat storage pack 10 is disposed between the upper and lower middle covers 52 and 53. In order to prevent displacement of the heat storage pack 10, the heat storage pack 10 is fixed to the middle covers 52 and 53 by sewing, adhesion, or heat fusion at a pair of opposed longitudinal orthogonal peripheral joint portions 13. The middle covers 52 and 53 to which the heat storage pack 10 is fixed are fixed to the outer covers 54 and 55 by sewing, adhesion, or heat fusion at the peripheral edge portions, respectively. As a result, the heating tool 50 as shown in FIG. 13 can be created. Moreover, the heating tool 50 may be in a form in which the three members of the heat storage pack 10, the inner covers 52 and 53, and the outer covers 54 and 55 are integrally fixed at a time.

  The heating device 50 described above is heated in a state in which the heating lid 50 is folded in multiple stages into the storage space 43 of the heat-resistant resin container 40 in a compact manner and the upper lid 44 is closed, as in FIG. 6 of the first embodiment described above. . The heating tool 50 heated to a predetermined temperature is taken out from the heat-resistant resin container 40 and placed on a bed or the like. By placing a user's heating target part (for example, a heel, a calf, or a waist) on it, the heat from the water-containing gel-like heat storage material 11 is transferred to the sealed bag 10, the inner cover 52 (53), It is transmitted to the site to be heated in the order of the outer cover 54 (55). Moreover, the heating tool 50 which concerns on 2nd Embodiment can be used not only for a human body but for warming pet animals, such as a dog and a cat.

  In addition, when the heating device 50 is overheated to a dangerous temperature (for example, about 80 to about 100 ° C.) in the microwave oven due to a setting error of heating conditions (heating time and output power) by microwaves in the microwave oven, Water vapor confined in the storage chamber 16 from a gap (so-called gas vent) formed preferentially in the narrow joint 31 (weak joint 38) disposed in a part of the peripheral joint 12 The steam that flows out from the heat storage pack 10 further flows out in the order of the inner covers 52 and 53 and the outer covers 54 and 55, and finally escapes to the outside ambient environment so that the heat storage pack 10 can be degassed. It becomes. As a result, it is possible to prevent the heat storage pack 10 from exploding explosively and surprising the people around it, although a small degassing sound called push is produced. Further, the hot water-containing gel-like heat storage material 11 does not scatter from the heating device 50 in the microwave oven.

  In addition, in order to make an understanding of this invention easy, it demonstrated, showing a specific numerical value and a constituent material thing, However, These are an illustration to the last and do not restrict | limit the protection scope of this invention.

1: Heating tool 3: Medium cover 4: Center housing part 5: Outer cover 7: Connection end part 9: Tip 10: Heat storage pack (sealed bag)
11: Hydrous gel-like heat storage material 12: Longitudinal peripheral joint portion 13: Longitudinal orthogonal peripheral joint portion 14: Longitudinal orthogonal boundary joint portion 16: Storage chamber 18: Crease 20: Inner cover 22: Attachment end portion 24: Attachment portion 30 33: Non-joining part 31, 34: Narrow joint part 32, 35, 38: Weak joint part 39: Normal joint part 40: Heat-resistant resin container 42: Container body 43: Storage space 44: Upper lid 45: Lower engagement Part 46: Upper engagement part 47: Lower grip part 48: Upper grip part 49: Temperature detection display part 60: Synthetic resin base body 62: Synthetic resin bonding layer 64: Heterogeneous material layer

Claims (12)

A water-containing gel-like heat storage material mainly composed of water;
A sealed bag body in which the hydrated gel heat storage material is enclosed;
Covering the sealed bag body, and an inner cover having a ventilation portion that prevents the passage of the water-containing gel-like heat storage material while allowing gas to pass through,
An outer cover that covers the inner cover and has a ventilation part that prevents the passage of the water-containing gel-like heat storage material while allowing gas to pass through,
The sealing bag body is composed of a synthetic resin base body in the form of a film or a sheet, and a synthetic resin bonding layer that is disposed at a peripheral portion of the synthetic resin base body and joins the synthetic resin base bodies together.
The synthetic resin base body has heat resistance not to be thermally deformed by overheating of the water-containing gel-like heat storage material,
A portion of the synthetic resin bonding layer is provided with a weakly bonded portion that is thermally inferior to other normal bonded portions due to overheating of the hydrogel heat storage material. Heating tool for microwave heating.   The heating tool according to claim 1, wherein a bonding width at the weakly bonded portion is narrower than a bonded width at the other normal bonded portion.   The heating tool according to claim 1 or 2, wherein a bonding strength at the weakly bonded portion is lower than a bonding strength at the other normal bonded portion.   The heating device according to any one of claims 1 to 3, wherein the joining is thermal welding.   The heating device according to any one of claims 1 to 3, wherein the joining is adhesion.   The warming tool according to any one of 1 to 5, wherein the weakly joined portion is formed in a peripheral portion where a periphery and an edge are cut off.   In any one of 1 to 4 and 6, wherein the synthetic resin base body is polyethylene terephthalate, polypropylene, or polyamide resin, and the synthetic resin bonding layer is polyethylene resin. The heating device described.   The heating tool according to any one of 1 to 7, wherein the outer cover has a heat insulating property.   Between the sealing bag body and the inner cover, there is further provided an inner cover having a ventilation portion and a heat insulating property that allows passage of gas but prevents passage of the hydrogel heat storage material. The heating device according to any one of 1 to 8. A heating tool for microwave heating according to claim 1,
A heating tool set for microwave heating, comprising: a heat-resistant resin container with a lid that houses the heating tool and can withstand microwave heating.   The said heat-resistant resin container has a ventilation part in a lid | cover and / or a container main body, or is comprised so that a lid | cover and a container main body may engage loosely, The heating of Claim 10 characterized by the above-mentioned. Ingredient set.   The said heat-resistant resin container has a temperature detection display part for detecting and displaying the temperature in a container in a lid | cover and / or a container main body, The heating tool set of Claim 10 characterized by the above-mentioned.

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