KR102665906B1 - heating pad - Google Patents

Abstract

The heating device 1 is provided with a heating element 3 containing powder of the oxidizable metal 3a, powder of the carbon material 3b, water, and an electrolyte. The heating element 3 is a sheet-like material. For the heating element 3, the mass ratio of water to the oxidizable metal 3a multiplied by 100 is preferably 95 to 130. It is preferable that the mass ratio of water contained in the heating element 3 to the carbon material 3b is 6 or more and 30 or less. It is also preferable that the heating device (1) further includes a wrapping material (35), and that a layer of water absorbent resin (37) is disposed between the heating element (3) and the wrapping material (35).

Description

heating pad

The present invention relates to a heating device.

Heating tools that utilize heat generated by the oxidation reaction of oxidizable metals are used for various purposes. The present applicant first proposes a steam heater comprising a heating layer made of a heating composition containing an oxidizable metal, water, and a water-retaining agent, a heating section formed by laminating a water-retaining sheet containing a polymer, and a pack housing the heating section. (Refer to Patent Document 1). This document also discloses that the mass ratio of water contained in the entire heating appliance to 100 parts by mass of the oxidizable metal is 40 parts by mass or more and 80 parts by mass or less.

Japanese Patent Publication No. 2013-146554

The present invention relates to a heating appliance.

In one embodiment, a heating element containing a powder of an oxidizable metal, a powder of a carbon material, water, and an electrolyte is provided.

In one embodiment, the heating element is a sheet-like material.

In one embodiment, the heating element is such that the ratio of the contained mass of the water to the contained mass of the powder of the oxidizable metal multiplied by 100 [100 × (water/powder of the oxidizable metal)] is 95 or more and 130 or less. am.

In one embodiment, the heating element has a ratio of the contained mass of water to the contained mass of the powder of the carbon material of 6 or more and 30 or less.

1(a) and 1(b) are cross-sectional views schematically showing the state of the heating element in the heating appliance.
2(a) to 2(c) are cross-sectional views schematically showing the arrangement of the heating element and the water absorbent resin layer in the heating appliance.
Figure 3 is a cross-sectional view schematically showing another arrangement of the heating element and the absorbent resin layer in the heating appliance.
Figure 4 is a plan view schematically showing one embodiment of a heating appliance.
Fig. 5 is an exploded perspective view schematically showing the heating device shown in Fig. 4.
FIG. 6 is a schematic diagram of a cross section along the horizontal direction, which is the longitudinal direction of the heating appliance shown in FIG. 4.
FIG. 7 is a schematic diagram of an enlarged cross-section of the heating device shown in FIG. 5.
FIG. 8 is a diagram schematically showing the use state of the heating appliance shown in FIG. 4.
Fig. 9 is a plan view schematically showing another embodiment of a heating appliance.
Fig. 10 is a plan view schematically showing another embodiment of a heating appliance.
Fig. 11 is a perspective view schematically showing another embodiment of a heating appliance.
Figure 12 is a schematic diagram of a device for measuring the amount of steam generated from a heating bulb.

Recently, the demand for heating appliances has increased, and technologies such as improving the temperature characteristics due to heat generation, maintaining temperature, and increasing the amount of steam generation are being considered. Methods for improving the temperature characteristics due to heat generation include, for example, increasing the content of the oxidizable metal, but in this case, the manufacturing cost increases or the mass of the target heating device increases. . The heating device disclosed in Patent Document 1 has improved temperature characteristics due to heat generation, but it is desirable to further improve the temperature characteristics due to heat generation, temperature sustainability, and amount of water vapor generated while reducing manufacturing costs.

As a result of careful study by the present inventor regarding the improvement of temperature characteristics, temperature sustainability, and amount of water vapor generated due to heat generation, surprisingly, the temperature characteristics and temperature due to heat generation were found to be improved while suppressing manufacturing costs by increasing the amount of moisture while containing electrolyte. It was found that it was possible to manufacture a heating device with good sustainability and good steam generation.

Therefore, the present invention relates to a heating device that has excellent heat generation temperature characteristics, temperature sustainability, and water vapor generation amount while suppressing manufacturing costs.

“Temperature characteristics” in the present disclosure means that the maximum temperature reached by heat generation from the heating device is high, and the maximum temperature is preferably 38°C or higher and 42°C or lower. As a result, it is possible to easily transfer or delay heat to the object to be heated at an early stage.

In addition, “temperature sustainability” in the present disclosure means that the time for which the temperature is maintained above a predetermined temperature due to heat generation from the heating device is long, and the predetermined temperature is preferably 38°C or higher. As a result, it is possible to easily transmit or delay heat to the object to be heated for a long period of time.

The heating tool of the present disclosure is used to apply heat to the object to be heated by bringing it into contact with the object to be heated when used.

Objects to be heated include, for example, articles with a hard surface, or a person's eyes, mouth, nose and surrounding skin or mucous membranes, or the throat, eyes, scalp, neck, arms, shoulders, legs, knees, It may be skin or mucous membranes in areas such as the abdomen, back, waist, buttocks, etc., but is not limited to this and is applicable.

Examples of the heating appliance of the present disclosure include the following aspects (a) to (d), but are not limited to these aspects.

(a) A form of an eye mask configured to be retained on and around the eyes.

(b) A form of attachment configured to be retained on the neck, arms, shoulders, legs, elbows, knees, forehead, abdomen, back or lower back.

(c) A form of face mask configured to be maintained over the mouth, nose and surrounding area, or over the entire face.

(d) The shape of a cup configured to fit the mouth, nose and surrounding area.

All disclosures in this specification are applicable to all of the aspects (a) to (d) described above.

The heating appliance of the present disclosure includes a heating element.

The heating element preferably contains (1) a powder of an oxidizable metal, (2) a powder of a carbon material, (3) water, and (4) an electrolyte.

The powder of the oxidizable metal has a function of generating heat accompanying an oxidation reaction with oxygen in the air, thereby making it possible to provide heat to the object to be heated.

The powder of the carbon material has the function of promoting the oxidation reaction of the metal to be oxidized and efficiently generating heat.

Water has a function of facilitating interaction between the powder of the metal to be oxidized and the carbon material that serves as a catalyst for the oxidation reaction.

The electrolyte has the function of increasing heat generation efficiency when promoting the oxidation reaction of the metal to be oxidized.

The heating element preferably includes a mixture containing the materials (1) to (4) above.

The heating element is configured as a sheet-like material.

A “sheet-like object” is a thin object that has two opposing surfaces, has a small thickness between the surfaces, and has flexibility and shape retention properties.

The sheet-like material has a thickness of 0.6 mm or more, preferably 0.8 mm or more, and more preferably 1.0 mm or more.

Additionally, the sheet-like material has a thickness of 3.0 mm or less, preferably 2.8 mm or less, and more preferably 2.0 mm or less.

The heating element constituting the heating device is preferably configured to have a function of reacting with oxygen in the air to generate heat, and in conjunction with this heat generation, water vapor heated to a predetermined temperature is generated from the heating element itself.

In this case, the water contained in the heating element may become water vapor, in which part of the water evaporates due to heat generation resulting from the oxidation reaction of the metal to be oxidized.

The form of the sheet-shaped heating element includes, for example, the forms (i) and (ii) shown below.

One form of the heating element includes (i) a form in which the heating element is a sheet-like material consisting of a base material sheet and a layer of a heating composition formed on one side of the heating element.

In this case, the exothermic composition is obtained by applying a paste containing a powder of an oxidizable metal, a powder of a carbon material, water, and an electrolyte to one side of a base sheet.

In the following description, the form of the heating element of (i) above is also referred to as “coating type.”

Additionally, as another form of the heating element, (ii) the heating element contains a powder of an oxidizable metal, a powder of a carbon material, water, and an electrolyte, and preferably further contains a fiber material, and the mixture is molded into a sheet shape. One form of super-chain is possible. The heating element in this form has the same meaning as the heating composition.

In the following description, the type of heating element in (ii) above is also referred to as “papermaking type.”

The heating element may be used as is in any of these forms (i) or (ii).

Alternatively, a heating element of either type (i) or (ii) housed in a breathable wrapping material may be used.

Additionally, it is preferable that the packaging material does not allow solids to flow in or out.

When the heating element is accommodated in the wrapping material, the wrapping material is separate from the heating element. In short, the packaging material does not constitute a heating element.

The shape of the wrapping material is not particularly limited, but is preferably flat from the viewpoint of making it easier to form a thin heating element and improving handling and fit properties.

When forming the wrapping material in a flat shape, it is also preferable that at least one side of the wrapping material is composed of a sheet material whose air permeability measured according to the provisions of JIS P8117 is within a predetermined range.

In one embodiment, it is preferable that one side of the wrapping material is comprised of a first sheet material that satisfies the predetermined air permeability described above. Additionally, it is also preferable that the second sheet material, which has lower air permeability than the first sheet material and does not satisfy the predetermined air permeability described above, is bonded together to form the other side of the wrapping material.

Description of the sheet material and ventilation will be provided later.

One embodiment of the above-described heating element is shown, for example, in FIGS. 1(a) and 1(b).

Figure 1(a) is an example of a coating type heating element, and Figure 1(b) is an example of a papermaking type heating element.

1(a) and 1(b), each structural member includes the heating element 3, the heating composition 30, the base sheet 31, the powder of the oxidizable metal 3a, the powder of the carbon material 3b, They are represented as electrolyte (3c), fiber material (33) and wrapping material (35).

1(a) and 1(b), for convenience of explanation, the electrolyte 3c is shown as if it exists in a solid state within the heating element 3, but it is not limited to this form. Specifically, the present disclosure also includes an aspect in which the electrolyte (3c) is partially or entirely dissolved in the water constituting the heating element, and the electrolyte (3c) cannot be visually recognized.

The heating element constituting the heating appliance preferably has a predetermined content ratio of the oxidizable metal and water.

Specifically, from the viewpoint of sufficiently generating steam, the ratio of the mass of water contained in the heating element to the mass of the powder of the oxidizable metal contained in the heating element is multiplied by 100 [100 × (water/powder of the oxidizable metal)] This is preferably 95 or more, more preferably 98 or more, even more preferably 100 or more, and even more preferably 105 or more.

In addition, from the viewpoint of increasing heat generation efficiency and preventing unintended temperature decrease, the ratio of the mass of water contained in the heating element to the mass of the powder of the oxidizable metal contained in the heating element is multiplied by 100 [100 × (water / oxidizable) metal powder)] is preferably 130 or less, more preferably 125 or less, even more preferably 120 or less, and even more preferably 110 or less.

In the present disclosure, the “ratio of the contained mass of water to the contained mass of the oxidizable metal powder multiplied by 100” is “100 × (mass of water [g]/mass of oxidized metal powder [g]). It is calculated by the formula expressed as 」.

By maintaining the above-mentioned content ratio of the oxidizable metal and water, even when the content of the oxidizable metal is lower than that of a conventional heating device, temperature characteristics due to heat generation equivalent to or better than those of the conventional device can be developed. In addition, the manufacturing cost of the heating appliance can be reduced.

In the present disclosure, “reduction in manufacturing cost” means that the content of the oxidizable metal contained in the heating element can be reduced while increasing the temperature characteristics due to heat generation to an equivalent level or higher compared to a conventional heating device.

Examples of the oxidizable metal powder constituting the heating element include powders of iron, aluminum, zinc, manganese, magnesium, and calcium. These can be used individually or in combination of two or more types.

Among these, it is preferable to use metallic iron from the viewpoints of handleability, safety, and manufacturing cost. That is, iron is preferably used.

Examples of iron powder include one or two or more types selected from reduced iron powder and atomized iron powder.

The powder of the metal to be oxidized constituting the heating element may be an aggregate of metal particles having no pores on the particle surface, or may be an aggregate of porous metal particles.

As the powder of the carbon material constituting the heating element, one can be used that has the function of promoting an oxidation reaction, and specifically, has the function of one or more of the following functions as an oxygen maintaining supply material for the metal to be oxidized and a catalytic activity. .

Examples of such carbon materials include powders such as coconut shell coal, charcoal powder, bituminous coal, activated carbon such as peat and lignite, carbon black, acetylene black, and graphite. These can be used individually or in combination of two or more types.

Among these, activated carbon powder is preferably used as the carbon material powder because it has a good balance between oxygen supply ability and catalytic ability.

From the viewpoint of facilitating the generation of water vapor accompanying heat generation by the heating element, it is preferable that the heating element contains an electrolyte.

Examples of the electrolyte contained in the heating element include one or more of a salt of an alkali metal or alkaline earth metal and phosphoric acid or sulfuric acid, or a chloride or hydroxide of an alkali metal or alkaline earth metal.

Among these, from the viewpoint of excellent chemical stability and production cost, it is preferable to use one or two or more of tripotassium phosphate, potassium hydroxide, sodium chloride, and potassium chloride as the electrolyte, and it is also preferable to contain at least sodium chloride. .

The electrolyte may be used as a solid, such as powder, or as a liquid dissolved or dispersed in a liquid medium such as water.

Next, another embodiment of the heating element in the heating appliance will be described.

In the following description, structural parts that are different from each embodiment described above will be mainly explained, and description of the same structural parts will be omitted. The description of each embodiment described above is appropriately applied to the structural parts that are not specifically explained in this embodiment.

This embodiment may be combined with the above-described embodiments, or may be employed independently.

In the present embodiment, the heating element preferably contains sodium chloride as an electrolyte, and the ratio of the contained mass of water to sodium chloride is preferably set to a predetermined ratio.

By maintaining a predetermined content ratio of sodium chloride as an electrolyte and water, even when the content of the oxidizable metal is lower than that of a conventional heating device, excellent temperature characteristics due to heat generation equivalent to or better than that of the conventional device can be exhibited. In addition, the manufacturing cost of a heating device including a heating element can be reduced.

Even when the content of the oxidizable metal is reduced, the heating element in the present embodiment promotes the oxidation of the oxidizable metal by sodium chloride for a long period of time and sustains the heat generation resulting from the oxidation reaction for a long period of time. The ratio of the contained mass of water (water/sodium chloride) is preferably 3.5 or more, more preferably 5.0 or more, further preferably 10.0 or more, and even more preferably 11.0 or more.

Moreover, even when the content of the oxidizable metal is reduced, from the viewpoint of sustaining the heat generation resulting from the oxidation reaction for a long period of time, the ratio of the contained mass of water to the contained mass of sodium chloride (water/sodium chloride) is preferably 25.0 or less, More preferably, it is 20.0 or less, further preferably is 18.0 or less, and even more preferably is 15.0 or less.

By maintaining this ratio, the oxidation reaction of the metal to be oxidized can proceed sufficiently and continuously, resulting in a heating device that exhibits excellent temperature sustainability due to heat generation. In addition, the manufacturing cost of the heating appliance can be reduced.

Moreover, in another embodiment of the heating element in the heating appliance, it is preferable that the ratio of the contained mass of water to the contained mass of the carbon material powder in the heating element is set to a predetermined ratio.

By setting the water and carbon materials to a predetermined content ratio, even when the content of the oxidizable metal is lower than that of a conventional heating appliance, excellent temperature characteristics and excellent temperature sustainability can be achieved by generating heat equivalent to or better than that of the conventional heating appliance. In addition, the manufacturing cost of the heating appliance can be reduced.

In detail, from the viewpoint of efficiently promoting the progress of the oxidation reaction of the metal to be oxidized, increasing the amount of heat generated per hour, and further increasing the generation of steam accompanying heat generation, the heating element is made of powder of carbon material. The ratio of the contained mass of water to the contained mass (water/carbon material powder) is preferably 6 or more, more preferably 10 or more, further preferably 11 or more, and even more preferably 12 or more.

In addition, from the viewpoint of providing an appropriate temperature to the object to be heated while promoting heat generation by efficiently generating the oxidation reaction from the start of heat generation, the ratio of the contained mass of water to the contained mass of the powder of the carbon material contained in the heating element (water /powder of carbon material) is preferably 30 or less, more preferably 20 or less, further preferably 15 or less, and even more preferably 14 or less.

By having such a structure, the pores of the carbon material can provide an appropriate balance between the supply of water that promotes the oxidation reaction of the oxidizable metal and the supply of oxygen in the atmosphere. The oxidation reaction can proceed sufficiently and continuously, resulting in a heating device (1) that exhibits excellent temperature characteristics due to heat generation. In addition, the manufacturing cost of the heating appliance can be reduced.

Furthermore, in another embodiment of the heating element in the heating appliance, the heating composition in the coating type or the heating element in the papermaking type has a mass ratio of the constituent materials excluding water to water at a predetermined ratio. It is desirable to have

By setting water and constituent materials other than water at a predetermined content ratio, it is possible to exhibit excellent temperature characteristics due to heat generation equal to or better than that of the conventional heating appliance, even when the content of the oxidizable metal is lower than that of the conventional heating appliance. In addition, the manufacturing cost of the heating appliance can be reduced.

This embodiment may be combined with each embodiment described above, or may be employed independently.

In detail, the heating composition in the coating type or the heating element in the papermaking type has a ratio of the mass of constituent materials other than water to the mass of water (constituent materials other than water/water), preferably It is 0.5 or more, more preferably 0.9 or more, and even more preferably 1.0 or more.

In addition, in the heating composition in the coating type or the heating element in the papermaking type, the ratio of the contained mass of constituent materials other than water to the contained mass of water (constituent materials other than water/water) is preferably 1.5 or less. , more preferably 1.3 or less, even more preferably 1.2 or less.

By having such a structure, the oxidation reaction of the oxidizable metal can sufficiently and continuously proceed, resulting in a heating device 1 that exhibits excellent temperature characteristics due to heat generation. In addition, the manufacturing cost of the heating appliance can be reduced.

In the heating element (or heating composition) in each of the above-described embodiments, the content ratio of the oxidizable metal and water, the content ratio of sodium chloride and water, the content ratio of water and powder of carbon material, and the content ratio of constituent materials other than water and water. As for the content ratio, it is preferable that any one of these satisfies the preferable content ratio, more preferably any two of them satisfy the preferable content ratio, and all of them satisfy the preferable content ratio. It is more preferable to be

As a result, the balance between the oxygen supply ability and the catalytic ability can be maintained more favorably, and the oxidation reaction of the oxidizable metal can proceed sufficiently and continuously. Even if the content of the oxidizable metal is lower than that of a conventional heating appliance, It is possible to efficiently achieve superior temperature characteristics and superior temperature sustainability by generating heat equal to or greater than that of the conventional method.

In addition, it is possible to further reduce the manufacturing cost of the heating element and the heating appliance provided therewith.

Additionally, the manufacturing efficiency of the heating element and the heating device provided therewith can be further increased.

Below, matters commonly applied to each of the above-described embodiments will be described.

From the viewpoint of achieving both the continuous generation of water vapor from the heating element and the appropriate progress of the oxidation reaction, it is also desirable to additionally dispose of an absorbent resin in or near the heating element.

In order to achieve both the continuous generation of water vapor from the heating element and the appropriate progress of the oxidation reaction, and to further increase manufacturing efficiency by preventing unintentional falling off of the constituent materials, when additionally arranging the absorbent resin, the wrapping material is used. Additionally, it is more preferable that a layer containing powder of water absorbent resin is disposed between the heating composition and the wrapping material in the heating element.

Each of the above-described forms can be applied to either a coating type or a papermaking type.

By additionally disposing the absorbent resin in or near the heating element, excess moisture present in the heating element can be absorbed. As a result, the oxidation reaction of the oxidizable metal can proceed efficiently, improving the temperature characteristics and temperature sustainability due to heat generation, and the moisture retained in the absorbent resin and heating element can be continuously released as water vapor. , it is possible to provide a pleasant sense of warmth to the user of the heating appliance.

When additionally disposing an absorbent resin in or near the heating element, as one aspect of the presence of the absorbent resin, for example, the powder of the absorbent resin may be added to each of the oxidizable metals and carbon materials of the heating composition in the heating element. Examples include a form in which it exists mixed with powder, water, and electrolyte. In this case, the water absorbent resin powder constitutes a part of the heating element.

Instead of this, another mode of existence of the water absorbent resin may be a mode in which a layer containing powder of the water absorbent resin exists adjacent to the heating element. In this case, the layer containing the water absorbent resin powder is constituted separately from the heating element.

The embodiment in which the layer containing the powder of the absorbent resin exists adjacent to the heating element includes, for example, (a) the embodiment in which the powder of the absorbent resin has a single layer formed by sandwiching it between two moisture-permeable sheets, (b) the absorbent layer an embodiment in which the resin powder is arranged in a single layer in contact with the heat-generating composition constituting the heating element without any other members intervening, or (c) a first absorbent resin layer in which the absorbent resin powder is arranged in adjacent layers, Adjacent to the first absorbent resin layer, a laminated structure in which a second absorbent resin layer formed by sandwiching absorbent resin powder between two moisture-permeable sheets is disposed without intervening the heating composition constituting the heating element and other members. Aspects can be given.

In short, in any of the cases (a) to (c) described above, it is preferable that the heating composition constituting the heating element is disposed between the base sheet and the layer containing the powder of the absorbent resin.

Alternatively, as another mode of existence of the water-absorbent resin, a layer containing the powder of the water-absorbent resin is disposed as a base sheet, and exists adjacent to the layer of the heat-generating composition in the heating element. . In this case, the water absorbent resin powder constitutes a part of the heating element.

The layer containing the water-absorbent resin powder is preferably formed by sandwiching the water-absorbent resin between two moisture-permeable sheets. In this case, it is preferable that the heating composition in the heating element is disposed in contact with the outer surface of one of the moisture permeable sheets.

When the layer containing the powder of the absorbent resin is disposed as a base sheet, it is preferable that the layer containing the powder of the absorbent resin is accommodated in the wrapping material together with the heating element from the viewpoint of preventing unintentional falling off of the constituent materials. .

In the case of providing a wrapping material, the wrapping material is formed by joining so that one side is made up of a first sheet material that has air permeability and the other side is made up of a second sheet material that has lower air permeability than the first sheet material. It is also desirable to have

The wrapping material is preferably flat.

When the layer containing the absorbent resin powder is disposed as a base sheet and is provided with a wrapping material, it is more preferable that the layer containing the absorbent resin powder and the first sheet material having air permeability in the wrapping material are arranged to face each other. .

Regarding the mode of existence of the heating element and the absorbent resin, one form in which a layer containing powder of the absorbent resin exists adjacent to the heating element is illustrated in Figs. 2(a) to 2(c).

In the embodiments shown in Figs. 2(a) to 2(c), a layer 3L containing the powder of the absorbent resin 37 is provided between the heating composition 30 and the wrapping material 35 in the heating element 3. (Hereinafter, this is also referred to as the water absorbent resin layer (3L).) is arranged.

In addition, the heating element 3, the absorbent resin layer 3L, and the wrapping material 35 shown in FIGS. 2(a) to 2(c) are drawn to have different overall thicknesses, but are only shown as such for convenience of explanation. The actual heating element 3, the absorbent resin layer 3L, and the wrapping material 35 in each form of 2(a) to (c) may have the same or different thicknesses.

In detail, when the water absorbent resin layer 3L is disposed, as shown in Fig. 2(a), the water absorbent resin layer 3L has the water absorbent resin 37 between two moisture permeable sheets 38, 38. It is preferable that it is formed by being sandwiched between . In this case, it is also preferable that the water absorbent resin layer (3L) is in contact with the heating composition (30) constituting the heating element (3) via the moisture permeable sheet (38).

In detail, it is preferable that the heat-generating composition 30 constituting the heat generating element 3 is disposed between the base sheet 31 and the water absorbent resin layer 3L.

By having this configuration, water vapor can be continuously released while continuously exhibiting excellent temperature characteristics due to heat generation, and more water vapor can be generated than a conventional heating device, so it does not affect the heated object such as the eyes, nose, or throat. It is possible to maintain a consistent perception by providing both good warmth and moisture.

The composition of the absorbent resin layer, for example, is preferably applied to a heating device in the form of an eye mask or a patch, so that a sense of warmth is continuously perceived in the applied area such as the user's eyes and their surroundings, thereby providing a feeling of warmth to the user. It is advantageous in that it can give people a good mood.

Instead, as shown in FIG. 2(b), the water absorbent resin layer 3L is such that the water absorbent resin 37 is in contact with the heat generating composition 30 constituting the heat generating element 3 without any other members intervening. It is also preferable that they are arranged in layers.

In detail, it is preferable that the heat-generating composition 30 constituting the heat generating element 3 is disposed between the base sheet 31 and the water absorbent resin layer 3L.

With this structure, more water vapor can be generated than a conventional heating device, so the amount of water vapor generated is further increased, and both a comfortable feeling of warmth and moistness are perceived by the heated object such as the eyes, nose, mouth, and throat. There is an advantage to being able to do it.

This composition in the absorbent resin layer, for example, is preferably applied to a heating device in the form of a face mask, so that the user's mouth and nose and their surroundings are widely perceived as warm and moist, giving the user a good feeling. It is advantageous in that it can be given.

Alternatively, as shown in FIG. 2(c), the absorbent resin layer 3L is adjacent to the heat generating composition 30 constituting the heating element 3 and the absorbent resin 37 without any other members intervening. A first water absorbent resin layer (3s) disposed, and a second water absorbent resin layer ( 3t) is preferably a stacked structure.

In detail, it is preferable that the heat-generating composition 30 constituting the heat generating element 3 is disposed between the base sheet 31 and the water absorbent resin layer 3L.

In the embodiment shown in Fig. 2(c), the water absorbent resin layer 3L has a laminated structure in which the first water absorbent resin layer 3s and the second water absorbent resin layer 3t are arranged in contact with each other.

With this configuration, the exothermic reaction of the heating element can proceed efficiently and a large amount of water vapor can be generated in a relatively short time, allowing early perception of warmth and moisture in objects to be heated, such as the eyes, nose, mouth, and throat. You can do it.

This configuration in the absorbent resin layer can intensively provide warmth and moisture to the user's mouth and nose and their surroundings in a short period of time, for example, by applying it to a heating device preferably in the form of a cup. It is advantageous.

Regarding the mode of existence of the heating element and the water-absorbing resin, another form in which a layer containing the powder of the water-absorbing resin exists adjacent to the heating composition in the heating element is illustrated in FIG. 3 .

In the embodiment shown in FIG. 3, the water absorbent resin layer 3L is disposed between the heating composition 30 and the wrapping material 35 in the heating element 3.

As shown in Fig. 3, the water absorbent resin layer 3L is preferably formed by sandwiching the water absorbent resin 37 between two moisture permeable sheets 38 and 38.

Also, as shown in FIG. 3, the heating composition 30 in the heating element 3 is preferably disposed in contact with one surface of the moisture permeable sheet 38. In this case, the water absorbent resin layer 3L is preferably also used as the base sheet 31 in the heating element 3.

As shown in Fig. 3, when the absorbent resin layer 3L is disposed as the base sheet 31 and is provided with a flat wrapping material 35, the absorbent resin layer 3L and the agent having breathability in the wrapping material 1 It is more preferable that the sheet materials are arranged to face each other.

With this configuration, water vapor can be continuously released while continuously exhibiting excellent temperature characteristics due to heat generation, and more water vapor can be generated than a conventional heating device, so it does not affect the heated object such as the eyes, nose, or throat. It is possible to maintain a consistent perception by providing both good warmth and moisture.

The composition of the absorbent resin layer, for example, is preferably applied to a heating device in the form of an eye mask or a patch, so that a sense of warmth is continuously perceived in the applied area such as the user's eyes and their surroundings, thereby providing a feeling of warmth to the user. It is advantageous in that it can give people a good mood.

When the absorbent resin layer is disposed adjacent to the heating element, the absorbent resin layer is preferably configured as a sheet-like material.

Specific examples of the absorbent resin include one or more types of starch, cross-linked carboxymethylated cellulose, polymers or copolymers of acrylic acid or alkali metal salts of acrylic acid, polyacrylic acid and its salts, and polyacrylate graft polymers.

As polyacrylate, sodium salt can be used.

In addition, the shape of the water absorbent resin includes particles having a spherical shape, a block shape, a grape cluster shape, a fibrous shape, or a combination thereof.

The water absorbent resin is preferably a powder composed of an aggregate of particles.

As the moisture permeable sheet, for example, fiber sheets such as thin leaf paper, absorbent paper, non-woven fabric, mesh sheets, etc. can be used.

The moisture permeable sheet preferably has breathability.

From the viewpoint of appropriately controlling the oxidation reaction and obtaining a heating device with good temperature characteristics due to heat generation, the powder of the metal subject to oxidation has an average particle size of the particles constituting the powder, preferably 1 μm or more, more preferably It is 10 ㎛ or more.

From the same viewpoint, the average particle diameter of the particles constituting the powder of the oxidizable metal is preferably 200 μm or less, and more preferably 100 μm or less.

From the viewpoint of sufficiently developing the catalytic ability of the oxidation reaction and obtaining a heating device with good temperature characteristics due to heat generation, the average particle size of the particles constituting the powder of the carbon material is preferably 1 μm or more, and more preferably. Typically, it is 10 ㎛ or more.

From the same viewpoint, the average particle diameter of the particles constituting the carbon material powder is preferably 200 μm or less, and more preferably 100 μm or less.

When the water absorbent resin is used as a powder, the average particle size of the particles constituting the powder can be within the range commonly used in the present technical field.

The average particle diameter of each material described above is, for example, the median diameter ( volume).

When the heating element is a paper-type sheet-like material comprised of a fiber material, natural and synthetic fiber materials can be used without particular restrictions.

Natural fiber materials include plant fibers (cotton, Hong Kong palm, wood pulp, non-wood pulp, peanut protein fiber, corn protein fiber, soy protein fiber, mannan fiber, rubber fiber, hemp, Manila hemp, sisal hemp, New Zealand hemp, Napoma, palm, sirloin grass, straw, etc.), animal fibers (wool, goat hair, mohair, cashmere, alcapa, angora, camel, vicuna, silk, down, down, feather, algin fiber, chitin fiber, Examples include fabricated fibers (e.g. fibers) and mineral fibers (e.g. asbestos). These fiber materials can be used individually or in combination.

Synthetic fiber materials include, for example, semi-synthetic fibers (acetate, triacetate, acetate oxide, promix, chlorinated rubber, hydrochloric acid rubber, etc.), synthetic polymer fibers (nylon, aramid, polyvinyl alcohol, polyvinyl chloride, polychlorinated Polyester such as vinylidene and polyethylene terephthalate, polyacrylonitrile, acrylic, polyethylene, polyethylene, polypropylene, polystyrene, polyurethane, rayon, viscose rayon, cupra, etc.), metal fiber, carbon fiber, glass fiber, etc. I can hear it. These fiber materials can be used individually or in combination.

Among these, from the viewpoint of achieving both uniform dispersion of the oxidizable metal and oxygen permeability by securing voids and improving temperature characteristics due to heat generation, the fiber material should be at least one of wood pulp, cotton, and polyester. It is desirable to use

The fiber material preferably has an average fiber length of 0.5 mm or more, more preferably 2 mm or more.

Moreover, the average fiber length of the fiber material is preferably 10 mm or less, more preferably 5 mm or less.

The average fiber length of a fiber material is the fiber length when 50 or more fiber materials are measured, one end of each fiber is fixed to a horizontal board, and the fiber is stretched downward by its own weight, Measurements are made using a fixture, or fixed on a microscope slide and measured using a microscope, and the obtained measurement results are taken as the arithmetic average.

The heating element may be composed solely of oxidizable metal powder, carbon material powder, water, and electrolyte, and, if necessary, fiber material, or in addition to various powders, water, and fiber material as needed, oxidizable metal powder, and carbon material. The exothermic composition may contain powders other than the material powder and the electrolyte.

Other powders include, for example, the above-mentioned water absorbent resin.

The content ratio of other powders in the heating element is expressed as a total mass ratio with respect to the starch powder constituting the heating element from the viewpoint of further improving the temperature characteristics, temperature sustainability, and amount of water vapor generated by heat generation, and is preferably 20% by mass or less. , more preferably 10% by mass or less.

The total mass ratio of the oxidizable metal powder and the carbon material powder to the entire powder constituting the heating element is preferably 80% by mass from the viewpoint of further improving the temperature characteristics, temperature sustainability, and amount of water vapor generated due to heat generation. or more, more preferably 90% by mass or more.

When other powders contain water-absorbent resin, their mass is based on the mass in the absolute dry state.

From the viewpoint of further reducing manufacturing costs, it is preferable that the heating element does not contain porous materials other than the powder of the oxidizable metal, the powder of the carbon material, water and electrolyte, and the fiber material included as necessary. Examples of such porous materials include silicon-containing inorganic compounds such as zeolite, silica, diatomaceous earth, vermiculite, perlite, and calcium silicate.

The heating device having the above configuration can promote the oxidation reaction of the metal to be oxidized by appropriately setting at least one of the content ratios of each material described above in the heating element, and as a result, the integral of temperature and heat generation duration Since the integrated sensible heat represented by is high, a heating device with excellent temperature characteristics and temperature sustainability due to heat generation can be obtained.

In addition, even when the content of the oxidizable metal is reduced compared to the conventional heating appliance, excellent temperature characteristics and excellent temperature sustainability due to heat generation can be achieved, so the heating appliance has temperature characteristics and temperature sustainability due to heat generation equivalent to or better than that of the conventional heating appliance. Can be manufactured by keeping costs down. In addition, it becomes a heating element with an excellent amount of water vapor generated from the heating element.

The heating appliance preferably has a main body portion and a heating element provided in the main body portion.

The main body portion preferably has a shape that covers the object to be heated when used.

The heating appliance preferably has a front sheet located on a side closer to the object to be heated and a back sheet located on a side farther from the object to be heated.

In detail, the heating device preferably has a front sheet located on a side closer to the user's skin and a back sheet located on a side farther from the user's skin.

The heating appliance preferably has a main body comprised of the top sheet and the back sheet.

The heating element is preferably held between the top sheet and back sheet constituting the main body.

It is also preferable that the heating element is held between the top sheet and the back sheet while being accommodated in a breathable wrapping material.

When the wrapping material is formed of a first sheet material and a second sheet material, the first sheet material having air permeability is preferably disposed on the side close to the object to be heated, and more specifically, on the side close to the user's skin. In short, it is preferable that the first sheet material is arranged to face the top sheet.

When the wrapping material is formed by a first sheet material and a second sheet material, the second sheet material, which has lower air permeability than the first sheet material, is disposed on the side farthest from the object to be heated, specifically on the side farthest from the user's skin. It is desirable. In short, it is preferable that the second sheet material is arranged to face the back sheet.

It is also preferable that the heating device is configured to generate water vapor heated to a predetermined temperature from the heating element. In this way, heat can be applied to the object to be heated and its surroundings.

Below, one embodiment of a heating appliance will be described with reference to the drawings.

4 to 7 show a heating implement having the form of a so-called eye mask as an embodiment of the heating implement.

In short, the present disclosure includes the use of a heating implement as an eye mask, and a method of using the heating implement as an eye mask.

In the following description, structural parts that are different from each of the above-described embodiments will be mainly explained, and identical structural parts will be given the same reference numerals and description will be omitted. For the structural parts not specifically explained in this embodiment, the description of each structure described above is appropriately applied.

The heating device of this embodiment is configured so that it can be held on and around the eyes. This heating device is used to apply heat to the eyes and their surroundings by touching them so as to cover both eyes of the person to be heated.

The heating device is designed to generate water vapor heated to a predetermined temperature, thereby providing heat to the eyes and their surroundings, which are objects of heating.

The heating appliance of this embodiment preferably has a horizontally long main body portion having a shape that covers both eyes of the user when used, and a heating element provided in the main body portion.

Additionally, the heating appliance of the present embodiment is preferably provided with a pair of ear hook portions mounted on the main body portion. The ear hook portion makes it possible to maintain the coverage of both eyes of the user.

In the following description related to this embodiment, the direction corresponding to the longitudinal direction of the heating appliance may be referred to as the horizontal direction, and the direction perpendicular to the horizontal direction may be referred to as the vertical direction.

The heating appliance in this embodiment is illustrated in FIG. 4 as the heating appliance 1, the main body portion 2, the heating element 3, and the horizontal direction X and the vertical direction Y.

In the heating device 1 shown in FIG. 4, earring portions 4 are formed at both outer ends of the main body portion 2 in the horizontal direction In this way, each earring part 4, 4 can be hung on the user's ear, and both eyes of the user can be covered by the main body part 2.

From the viewpoint of improving wearability, it is preferable that the sheet material constituting the earring portion 4 is an elastic sheet.

Fig. 5 shows an exploded perspective view of the heating appliance 1 of this embodiment.

Also, FIG. 6 shows a cross-sectional view of the heating appliance 1 along the horizontal direction X.

The main body portion 2 of the heating appliance 1 shown in FIGS. 5 and 6 includes a top sheet 5 located on the side closer to the user's skin, and a back sheet (5) located on the side farther from the user's skin. 6) It is flat and equipped with .

The surface sheet 5 constitutes a surface including a portion that comes into contact with an object to be heated, such as a person's eyes, mouth, or nose, when the heating device 1 is used.

The back sheet 6 is the surface on the side away from the user's skin and forms the outer surface of the heating element 1. In short, in FIGS. 5 and 6, the upper part of the drawing is the side closer to the user's skin, and the lower part of the drawing in the same drawing is the side farthest from the user's skin.

The top sheet 5 and the back sheet 6 shown in FIGS. 5 and 6 are bonded to each other with an adhesive 7 such as a hot melt adhesive in a state in which they are overlapped, so that both sheets 5 and 6 ) Two heating elements 3, 3 are accommodated in the space apart from each other in the horizontal direction X.

In other words, in this embodiment, the heating element 3 is configured to be non-detachable from the main body portion 2.

The heating element 3 is preferably held between the top sheet 5 and the back sheet 6 constituting the main body portion 2.

Among the topsheet 5 and the backsheet 6, it is preferable that at least the topsheet 5 is made of a breathable fiber sheet.

A fiber sheet is an aggregate of constituent fibers in which a plurality of constituent fibers are formed into a sheet shape by at least one of entangling, fusion, and adhesion.

A detailed description of each sheet 5 and 6 will be provided later.

In the cross-sectional view shown in FIG. 6, the fixed state of the heating element 3 is shown.

As shown in FIG. 6, the heating element 3 is formed by bonding a plurality of sheet materials together by heat sealing or the like, and is preferably housed in a breathable wrapping material 35.

In this case, the heating element 3 is preferably held between the top sheet 5 and the back sheet 6 while being accommodated in the breathable wrapping material 35.

The wrapping material 35 is preferably flat. In this case, the wrapping material 35 is formed by joining so that one side is composed of a first sheet material having air permeability and the other side is composed of a second sheet material that has lower air permeability than the first sheet material. It is also desirable to have

When the wrapping material 35 is formed of a first sheet material and a second sheet material, the first sheet material having air permeability is preferably disposed on the side closest to the user's skin. In short, it is preferable that the first sheet material is arranged to face the top sheet 5.

When the wrapping material 35 is formed of a first sheet material and a second sheet material, the second sheet material, which has lower air permeability than the first sheet material, is preferably disposed on the side farthest from the user's skin. In short, it is preferable that the second sheet material is arranged to face the back sheet 6.

In FIG. 6, the first sheet material 351 and the second sheet material 352 are illustrated as sheet materials constituting the wrapping material 35.

When the heating appliance 1 is configured to include the wrapping material 35, as shown in FIG. 6, the outer surface of the wrapping material 35 and the inner surface of the back sheet 6 in the heating appliance 1 are , it is preferably fixed by the adhesive fixing portions 7a and 7a formed by the adhesive 7, and the other side is not fixed to the backsheet 6.

Each of the adhesive fixing portions 7a and 7a in the embodiment shown in FIG. 6 is formed in the central region of the lateral direction X of the heating appliance 1 and extends along the vertical direction Y of the heating appliance 1. .

By having such a structure, the heating element 3 can be placed with a high fit to the object to be heated when using the heating tool 1, and it is possible to efficiently provide heat to the object to be heated.

Returning to Fig. 5, as shown in the same figure, the earring portion 4 is preferably made of a sheet material, and an insertion passage portion 4A extending in the horizontal direction X is formed on the sheet material. .

The insertion passage portion 4A is a hole for passing the earring portion 4 through the ear when the earring portion 4 is worn on the ear.

Instead of this, the insertion passage portion 4A may be formed of a through slit through which the ear can pass, or the like.

As shown in FIGS. 5 and 7, the ear hook portion 4 is joined to the outer surface of the top sheet 5 of the main body portion 2 at both outer ends in the horizontal direction A joint area 9 is formed where the portion 2 and the earring portion 4 are joined.

The joint area 9 also functions as a bent portion when the earring portion 4 is inverted with the joint end portion 9s as an axis.

Fig. 7 is a cross-sectional view showing the shape of the joint area 9 in the heating appliance 1 of the present embodiment.

The joint area 9 of the main body portion 2 and the earring portion 4 shown in FIGS. 5 and 7 extends from the joint end portion 9s, which is the inner end in the horizontal direction 2) It is preferably joined continuously to the outer end in the horizontal direction

As shown in Fig. 7, the bonding area 9 is preferably formed by bonding the top sheet 5 of the main body portion 2 and the earring portion 4.

The joint area 9 preferably also functions as a bent portion when the earring portion 4 is inverted with the joint end portion 9s as an axis.

The bonded regions 9 shown in FIGS. 5 and 7 are formed by continuously bonding, but instead, they may be formed by intermittent bonding.

The method of using the eye mask-shaped heating device 1 shown in FIGS. 4 to 7 is, for example, as shown in FIG. 8, using the ear hook portion 4 to hold the heating device 1 on the ear. You can use it.

By using this form of use, the water vapor and heat generated from the heating device 1 can be uniformly applied to the user's eyes and their surroundings, regardless of the user's posture (for example, lying down or sitting, etc.). This is advantageous in that the versatility of the use form of the heating appliance 1 is improved.

Below, another embodiment of the heating implement 1 will be described with reference to FIG. 9 . In Fig. 9, as an embodiment of the heating implement, a heating implement having a so-called stick-on type is shown.

In short, the present disclosure includes the use of a heating tool in a patched form and a method of using the heating tool in a patched form.

In the following description, structural parts that are different from each embodiment described above will be mainly explained, and identical structural parts will be given the same reference numerals and explanation will be omitted. For the structural parts not specifically explained in this embodiment, the description of each structure described above is appropriately applied.

In Fig. 9, one embodiment is shown when the heating tool 1 is in a sticky form.

The heating device 1 of the present embodiment includes a main body portion 2 having a top sheet 5 that constitutes a skin-facing surface when in use, and a back sheet 6 that constitutes a non-skin facing surface when in use; , it is preferable to provide a heating element (3) provided in the main body portion (2).

The heating element 3 is preferably held between the top sheet 5 and the back sheet 6 constituting the main body portion 2.

It is also preferable that the heating element 3 is held between the top sheet 5 and the back sheet 6 constituting the main body 2 while being accommodated in the breathable wrapping material 35.

In the present embodiment, the surface sheet 5 constituting the surface facing the skin preferably has an adhesive portion 51 formed on a partial area or the entire outer surface.

The adhesive portion 51 is for holding the heating appliance 1 at the area where the heat and water vapor generated from the heating appliance 1 are applied.

By forming the adhesive portion 51, it can be used by attaching it directly to the user's skin or to the user's clothes, and the heating device 1 can be easily held on a predetermined area that is to be heated.

Additionally, in order to develop the adhesiveness of the adhesive portion at a desired timing, a base material such as a film that covers the adhesive portion may be formed.

Below, another embodiment of the heating implement 1 will be described with reference to FIG. 10 . In Fig. 10, a heating implement having the form of a so-called face mask is shown as an embodiment of the heating implement.

In short, the present disclosure includes the use of a heating implement as a face mask, and a method of using the heating implement as a face mask.

In the following description, components that are different from each of the above-described embodiments will be mainly explained, and the same components will be given the same reference numerals and description will be omitted. For the structural parts not specifically explained in this embodiment, the description of each structure described above is appropriately applied.

Fig. 10 shows an embodiment in which the heating device 1 is in the form of a face mask.

The heating appliance 1 of this embodiment preferably includes a main body 2 that covers at least one of the user's mouth and nose when used, and a heating element 3 provided in the main body 2.

In addition, the heating appliance 1 of the present embodiment preferably includes a pair of earring portions 4 formed on both left and right ends of the main body portion 2. The ear hook portion makes it possible to maintain coverage of at least one of the user's mouth and nose.

The earring portion 4 in this embodiment is comprised of a sheet material.

It is preferable that an insertion passage portion 4A is formed in the central region of the earring portion 4.

The heating element 3 is preferably held between the top sheet 5 and the back sheet 6 constituting the main body portion 2.

It is also preferable that the heating element 3 is held between the top sheet 5 and the back sheet 6 constituting the main body 2 while being accommodated in the breathable wrapping material 35.

As shown in FIG. 10, the heating appliance 1 of the present embodiment preferably has a folding line 15 at a position corresponding to the user's nose volume.

The fold line 15 in the present embodiment is formed in the horizontal central region of the main body portion 2 of the heating appliance 1.

By having such a configuration, the face mask-shaped heating device 1 can, when used, adhere the surface sheet 5 along the convex shape of the nose with the fold line 15 as the flexible axis. Therefore, it becomes difficult for a gap between the heating device 1 and the object to be heated to occur, thereby enhancing the heating and humidifying effect.

Instead of this, depending on the purpose, etc., a flat heating tool 1 without a fold line 15 may be used.

The heating tool 1 of the present embodiment can be used by holding the heating tool 1 to the ear using the ear hook portion 4.

Below, another embodiment of the heating implement 1 will be described with reference to FIG. 11 . In Fig. 11, a heating implement having a so-called cup shape is shown as an embodiment of the heating implement.

In short, the present disclosure includes the use of a heating appliance in the form of a cup, and a method of using the heating appliance in the form of a cup.

In the following description, components that are different from each of the above-described embodiments will be mainly explained, and the same components will be given the same reference numerals and description will be omitted. For the structural parts not specifically explained in this embodiment, the description of each structure described above is appropriately applied.

Figure 11 shows an embodiment when the heating tool 1 is in the shape of a cup.

The heating appliance 1 of the present embodiment preferably includes a main body 2 that covers at least one of the user's mouth and nose when used, and a heating element 3 provided in the main body 2. .

Depending on the intended use, the heating device 1 of the present embodiment may be provided with an earring portion capable of maintaining the covering state of at least one of the user's mouth and nose, or may be provided without the earring portion.

As shown in FIG. 11, the heating appliance 1 in the present embodiment includes a first panel portion 21 and a second panel portion 22 of substantially the same shape as the first panel portion 21. It is desirable to have a main body portion 2 configured as follows.

In this embodiment, both panel parts 21 and 22 are formed in a fan shape, and it is preferable that the tapered portions in front of both panel parts 21 and 22 are continuous.

Both the first panel portion 21 and the second panel portion 22 are composed of a continuous top sheet 5 and a continuous back sheet 6, and between the top sheet 5 and the back sheet 6 It is preferable that the heating element 3 is maintained in .

It is also preferable that the heating element 3 is held between the top sheet 5 and the back sheet 6 constituting the main body 2 while being accommodated in the breathable wrapping material 35.

The heating device 1 in the present embodiment has a boundary line D, which becomes a flexible axis for bending the main body 2, at a continuous portion of the first panel portion 21 and the second panel portion 22. It is desirable.

In this embodiment, the first panel portion 21 and the second panel portion 22 are preferably linearly symmetrical with the boundary line D as the axis.

In the heating device 1 of the present embodiment, the top sheets 5 are bent to face each other with the boundary line D as the axis, and the first side edge 21A of the first panel portion 21 and the second panel are bent. The first side edge 22A of the portion 22, the second side edge 21B of the first panel portion 21, and the second side edge 22B of the second panel portion 22 are polymerized, respectively. It is joined.

In both panel parts 21 and 22, the third side edge 21C of the first panel part 21 and the third side edge 22C of the second panel part 22 located outward are joined together. Instead, an opening is formed in a cup shape. This opening is preferably open enough to cover the user's nose and mouth.

As a result, a normal cup-shaped heating element with a bottom is formed, with the boundary line D and the position near it as the bottom. The outer surface of this cup-shaped heating device is formed by the back sheet (6), and the inner surface is formed by the top sheet (5).

The cup-shaped heating device of this embodiment does not have an earring portion. In this case, it is desirable for a typical cup-shaped heating device with a bottom to have dimensions that allow the main body portion to be held by a human hand. In short, the cup-shaped heating device is preferably configured so that the main body part can be held by a human hand.

When using the cup-shaped heating device, for example, the main body part can be held by a person's hand and the opening of the cup-shaped heating device can be held near the user's nose and mouth.

Regardless of the heating appliance of any of the above-described embodiments, from the viewpoint of suppressing the generation of heat and water vapor resulting from the occurrence of an unintended oxidation reaction and maintaining high quality until use, the heating appliance has an oxygen blocking pack. It is desirable to manufacture, store, and distribute the package of the heating device sealed and housed in a packaging pack such as the like. In the case of a package, one heating element may be an individual packaging body accommodated in one packaging pack, or, if necessary, a packaging body may be a packaging body containing a plurality of heating appliances contained in one packaging pack.

The various sheet materials used for the earrings, top sheet, back sheet, base sheet, wrapping material, and moisture permeable sheet are each independently determined by their breathability, moisture permeability, texture, elasticity, strength, and leakage prevention of the constituent materials of the heating composition. It can be decided appropriately considering the nature of .

As the sheet material, for example, non-woven fabric, woven fabric, fiber sheet such as paper, resin foam sheet, metal sheet, or a combination thereof are used.

The sheet material may have a single structure consisting of only one sheet material, regardless of single layer or multilayer, or may have a laminated structure in which two or more types of sheet materials are overlapped.

As a sheet material with high breathability and moisture permeability, meltblown nonwoven fabric is preferably used.

As a sheet material used for the purpose of improving the texture, an air-through nonwoven fabric or a thermal bond nonwoven fabric is preferably used.

As a sheet material used for the purpose of expressing elasticity, for example, an air-through nonwoven fabric containing synthetic fibers such as polyester such as polyethylene terephthalate, polyethylene, and polypropylene, spunbonded nonwoven fabric, and thermal bond nonwoven fabric are used. .

As a sheet material used for the purpose of providing strength, spunbond nonwoven fabric, spunlace nonwoven fabric, needle punched nonwoven fabric, chemical bonded nonwoven fabric, etc. are preferably used.

In addition to or instead of the nonwoven fabric described above, a nonwoven fabric surface-treated with silicone, surfactant, etc. can be used, or a foam sheet made of a thermoplastic resin such as polyethylene or polyurethane can be used.

In addition, these sheet materials can exhibit desired properties by mixing multiple fibers with different fiber raw materials, fiber diameters, degree of fiber crimp, etc., or by combining multiple sheet materials.

The earring portion, top sheet, back sheet, base sheet, wrapping material, and moisture permeable sheet may be each independently a single structure consisting of only one sheet material regardless of single layer or multilayer, or a laminated structure in which two or more types of sheet materials are overlapped. It's okay.

As the top sheet, it is preferable to use a fiber sheet as described above.

From the viewpoint of increasing the manufacturing efficiency of the heating appliance, at least one type of needle-punched nonwoven fabric, through-air nonwoven fabric, spunbonded nonwoven fabric, and chemical bonded nonwoven fabric can be preferably used.

When using fiber sheets such as non-woven fabric as the top and back sheets, it is desirable that both the top and back sheets have breathability. “Having breathability” means that the air permeability measured according to JIS P8117:2009 is 10000 seconds/100 mL or less. The air permeability measured according to JIS P8117 is defined as the time for 100 mL of air to pass through an area of 6.42 cm 2 at room temperature and pressure.

In detail, the air permeability of the top sheet and the back sheet is each independently preferably 0.01 sec/100 mL or more, and more preferably 0.03 sec/100 mL or more.

Air permeability is measured according to JIS P8117:2009. A small air permeability means that it does not take time for air to pass through, which means that the air permeability is high.

By using a surface sheet with such air permeability, heat or water vapor can be efficiently applied to the object to be heated, and the oxidation reaction of the oxidizable metal can be efficiently controlled to achieve the desired temperature characteristics and desired temperature sustainability due to heat generation. A heating bulb having can be obtained.

In the case of providing a breathable wrapping material, from the viewpoint of appropriately discharging hot steam to the outside and effectively providing heat to the object to be heated, the sheet material constituting one side of the wrapping material has an air permeability measured according to the provisions of JIS P8117. , preferably greater than 0 seconds/100 mL, more preferably greater than 10 seconds/100 mL, further preferably greater than 20 seconds/100 mL, and even more preferably greater than 30 seconds/100 mL.

In addition, from the viewpoint of suppressing unintentional excessive vapor release and temperature decrease, the sheet material constituting one side of the wrapping material preferably has an air permeability measured according to the provisions of JIS P8117 of 5000 sec/100 mL. Below, more preferably 3000 seconds/100 mL or less, further preferably 1500 seconds/100 mL or less, even more preferably 100 seconds/100 mL or less.

In one embodiment, when an air permeable wrapping material (35) is provided, and the wrapping material includes a first sheet material (351) with air permeability, and a second sheet material (352) with lower air permeability than the first sheet material. , the air permeability of the first sheet material 351 preferably satisfies the range described above.

In addition, the air permeability of the second sheet material 352 is preferably 10,000 seconds/100 mL or more, more preferably 25,000 seconds/100 mL or more, and sufficient and appropriate temperature persistence is achieved by heat generation, so that water vapor is transmitted to the object to be heated. From the viewpoint of providing sufficient airflow, it is more preferable to be non-ventilated.

“Non-ventilation” describes that the air permeability measured according to JIS P8117:2009 is 80,000 seconds/100 mL or more.

The first sheet material having the above-described air permeability is, for example, a resin film formed with a plurality of through holes, or a sheet obtained from a resin composition containing polyethylene and a filler such as calcium carbonate, uniaxially stretched or biaxially stretched. A film obtained by axial stretching can be used. The air permeability can be appropriately changed by adjusting the degree of stretching.

A sheet applicable to the first sheet material is disclosed, for example, in EP1939240 A1.

As the second sheet material having the above-described air permeability, for example, a resin film with fewer through holes or no through holes than the first sheet material can be used.

When an air permeable wrapping material is provided, and the wrapping material has a first sheet material with air permeability and a second sheet material with lower air permeability than the first sheet material, the moisture permeability of the first sheet material measured according to JIS Z0208 is preferably is 480 g/(m2·24 h) or more, more preferably 720 g/(m2·24 h) or more, and even more preferably 960 g/(m2·24 h) or more.

In addition, the moisture permeability of the first sheet material measured according to JIS Z0208 is preferably 5000 g/(m2·24 h) or less, more preferably 4750 g/(m2·24 h) or less, and even more preferably 4500 g. /(㎡·24 h) or less.

In addition, the moisture permeability of the second sheet material measured according to JIS Z0208 is preferably 480 g/(m2·24 h) or less, more preferably 240 g/(m2·24 h) or less, and even more preferably 0 g. /(㎡·24 h).

By setting the moisture permeability of each of the first sheet material and the second sheet material independently to the above-mentioned range, sufficient and appropriate temperature characteristics and temperature sustainability due to heat generation can be achieved, and water vapor can be sufficiently provided to the object to be heated.

For each sheet material that satisfies this moisture permeability, for example, the same sheet material described in terms of air permeability described above can be used.

When using a fiber sheet as a surface sheet, the basis weight of the surface sheet is preferably 10 g/m 2 or more, more preferably 30 g/m 2 or more, and even more preferably 50 g/m 2 or more.

The basis weight of the surface sheet is preferably 200 g/m 2 or less, more preferably 130 g/m 2 or less, and even more preferably 100 g/m 2 or more.

Additionally, when using a fiber sheet as the backsheet, the basis weight of the backsheet is preferably smaller than that of the topsheet from the viewpoint of improving heat retention and durability.

In detail, the basis weight of the backsheet is preferably 10 g/m 2 or more, and more preferably 20 g/m 2 or more.

The basis weight of the backsheet is preferably 100 g/m 2 or less, and more preferably 80 g/m 2 or less.

When the top sheet and the back sheet have a laminated structure, the basis weight of the entire sheet may be within the above-mentioned range.

“Moisture permeability” in a moisture permeable sheet refers to the moisture permeability of the sheet being 2000 g/(m2·24 h) or more as measured according to JIS Z0208.

Specifically, the moisture permeable sheet has a moisture permeability of the sheet measured according to JIS Z0208, preferably 2000 g/(m2·24 h) or more, more preferably 2500 g/(m2·24 h) or more. It is more than 3000 g/(㎡·24 h).

The sheet having the moisture permeability described above can be suitably used as a moisture permeable sheet in the water absorbent resin layer. When using multiple moisture permeable sheets, the moisture permeability value of each moisture permeable sheet may be the same or different.

The heating appliance in each of the above-described embodiments has an amount of water vapor generated (mg/10 min) 10 minutes after the start of heat generation of the heating appliance (mg/10 min), preferably 70 mg/10 min or more, more preferably. Preferably it is 130 mg/10 min or more, more preferably 180 mg/10 min or more, even more preferably 185 mg/10 min or more, even more preferably 190 mg/10 min or more, and 300 mg/10 min or less. is realistic.

Due to this configuration, the amount of water vapor generated is large, so when the heating device is in the form of an oral mask, it can be used as an object to be heated inside and outside the mouth, cheeks, nose, throat, etc. of the user and the surrounding areas. It can be perceived with both pleasant warmth and moistness.

Such water vapor generation amount can be determined, for example, by setting the content ratio of each constituent material of the above-described heating element to an appropriate ratio or by using the water absorbent resin 37 in the configuration shown in Fig. 2(a) or Fig. 2(b). This can be easily achieved by adopting the arranged configuration.

The amount of water vapor generated is measured using an apparatus 100 having the configuration shown in FIG. 12.

The apparatus 100 includes a measurement chamber 101 made of aluminum (volume 4.2 L), an inflow passage 102 arranged in communication with the lower part of the measurement chamber 101, and an outflow passage arranged in communication with the upper part of the measurement chamber 101. (103) is provided. The inflow passage 102 is configured to allow dehumidified air (humidity less than 2%RH, flow rate 2.1 L/min) supplied from an air supply unit (not shown) to flow into the measurement chamber 101. In addition, the device 100 includes an inlet thermo-hygrometer 104 and an inlet flow meter 105 formed in the inflow path 102, an outlet thermo-hygrometer 106 and an outlet flow meter 107 formed in the outflow path 103, and a measurement chamber. It has a thermometer (thermistor) 108 formed within 101. The thermometer 108 preferably has a temperature resolution of about 0.01°C.

The method of measuring the amount of water vapor generated using the device 100 is as follows.

First, the oxygen blocking pack is opened with the heating element to be measured airtightly contained in the oxygen blocking pack, and then one heating element is taken out. When the heating element is accommodated in the packaging material, it is taken out in the state of the heating element contained in the packaging material.

The packaging material of the extracted heating element is placed in the measuring chamber 101 with one side facing the outside, and the thermometer 108 is mounted on it. When one side of the wrapping material and the other side are composed of sheets with different air permeability, the surface of the wrapping material on the side of the highly breathable sheet (preferably the first sheet material) is placed in the measurement chamber 101 so that the side faces the outside. Tact, and mount a thermometer (108) on the surface.

In this state, dehumidified air flows from the lower part of the measurement chamber 101 through the inflow passage 102, and from the respective temperatures and respective humidity measured by the inlet thermo-hygrometer 104 and the outlet thermo-hygrometer 106, the measurement chamber 101 Find the difference in absolute humidity before and after air distribution. Additionally, the amount of water vapor released from the heating port is calculated from the air flow rate measured by the inlet flow meter 105 and the outlet flow meter 107. The amount of water vapor generated is set as the starting point of measurement when the heating device is taken out of the oxygen blocking pack and the heating element is brought into contact with the air, and is taken as the total amount measured at a predetermined time from that point. The predetermined time can be, for example, 10 minutes, but it is not limited to these times and can be set appropriately.

The duration of the heating appliance at a temperature of 38°C or higher (hereinafter also referred to as the duration of 38°C or higher) is preferably 5 minutes or more, more preferably 15 minutes or more, and even more preferably 20 minutes or more. Preferably it is 30 minutes or less, more preferably 28 minutes or less, and even more preferably 27 minutes or less.

With such a configuration, when using the heating appliance, pleasant heat can be more continuously perceived inside and outside the mouth, cheeks, nose, throat, etc. of the user, and to objects to be heated, such as the surrounding areas. In addition, it is possible to reduce the possibility that the object to be heated becomes excessively hot after use or that wetting occurs due to excessive adhesion of water vapor. Additionally, when the heating device is applied to the eyes and their surroundings, excessive thermal stimulation to the head can be suppressed.

Such a temperature duration can be easily achieved, for example, by employing a configuration in which the water absorbent resin 37 is disposed in the configuration shown in Fig. 2(a) or Fig. 2(b).

The duration of time above 38°C can be measured by the following method, for example, in an environment with a room temperature of 20°C and a humidity of 50%RH.

First, the heating bulb to be measured is hermetically contained in the oxygen blocking pack, the oxygen blocking pack is opened, and the heating bulb is taken out.

Next, the measurement surface of the temperature sensor of a data collection thermometer (LT-8, manufactured by Gram) is fixed to the object to be heated with tape. If the heating device is in the form of, for example, an eye mask or a stick-on type, and is configured to be in surface contact with the object to be heated when used, the surface in contact with the heating device in the object to be heated (for example, if the heating device is an eye mask) , is installed on the wearer's upper eyelid) and fixed with tape. Instead, for example, if the heating device is in the form of a face mask or a cup, and has a space with the object to be heated when used, the area to which the heating device is applied (e.g., the heating device of the face mask) If it is baked, it is mounted on the wearer's mouth and fixed with tape. With the thermometer measuring device connected to the temperature sensor, the temperature is measured over time. The temperature is measured at 10-second intervals using the start of heat generation as the start of measurement, and the measurement is performed for a total of 60 minutes.

From the heat generation profile plotted with the vertical axis being the measured temperature (°C) and the horizontal axis being the measurement time (seconds), the length of time during which the temperature of 38°C or higher was measured is taken as the maintenance time of 38°C or higher. In addition, when measuring and calculating the maximum achieved temperature of a heating device, the maximum temperature measured from the heat generation profile is taken as the maximum achieved temperature.

When the heating device has an earring portion, the shape of the earring portion is not limited to the sheet-like member shown in FIGS. 4 and 5 as long as the main body portion can be fixed to both eyes of the user.

For example, instead of the earring part made of a sheet material, the earring part made of a string-like member may be adopted, or the earring part made of a filamentous or strip-shaped member may be adopted.

From the viewpoint of improving the fit of the heating device, it is preferable to use an elastic material such as rubber to form the stretchable earring portion 4.

The form of the heating element in the heating device of the embodiment shown in FIGS. 4, 9, 10, and 11 has been described as a form in which two heating elements are held apart from each other, but it is possible to provide a sense of warmth to the object to be heated and its surroundings. If present, the shape of the heating element is not particularly limited.

For example, one heating element having a shape and size capable of covering the object to be heated and its surroundings may be held between the top sheet and the back sheet, or three or more heating elements may be held between the top sheet and the back sheet. .

In addition, the heating element shown in FIGS. 5 and 6 is only partially fixed in the horizontal central region of the heating element, but is not limited to this form.

For example, the heating element and the back sheet may be joined continuously or intermittently with an adhesive in the horizontal central area and areas other than the central area, and the adhesive may be applied to the entire surface of the back sheet where the heating element is placed. Thus, it may be joined.

Although the present invention has been described above based on its preferred embodiments, the present invention is not limited to the above embodiments.

In relation to the embodiments of the present disclosure described above, the following heating appliance is further disclosed.

＜1＞

A heating element containing a powder of an oxidizable metal, a powder of a carbon material, water, and an electrolyte is provided,

The heating element is a sheet-like material,

In the heating element, the ratio of the mass of water contained in the powder of the oxidizable metal multiplied by 100 [100 × (water/powder of the oxidizable metal)] is 95 or more and 130 or less,

The heating element is a heating device in which the ratio of the contained mass of the water to the contained mass of the powder of the carbon material is 6 or more and 30 or less.

＜2＞

The above value [100

The heating device according to <1> above, wherein the temperature is more preferably 125 or less, further preferably 120 or less, and even more preferably 110 or less.

＜3＞

Contains sodium chloride as the electrolyte,

The heating appliance according to <1> or <2> above, wherein the ratio of the contained mass of the water to the contained mass of the sodium chloride is 3.5 or more and 25 or less.

＜4＞

The ratio of the contained mass of the water to the contained mass of the sodium chloride is preferably 5.0 or more, more preferably 10.0 or more, and even more preferably 11.0 or more,

The heating implement according to <3> above, wherein the temperature is more preferably 18.0 or less, and even more preferably 15.0 or less.

＜5＞

The ratio of the contained mass of the water to the contained mass of the powder of the carbon material is more preferably 10 or more, further preferably 11 or more, and even more preferably 12 or more,

The heating implement according to any one of the above <1> to <4>, wherein the temperature is more preferably 20 or less, further preferably 15 or less, and even more preferably 14 or less.

＜6＞

The heating element has the structure of (i) or (ii) below,

(i) It consists of a base sheet and a layer of a heat-generating composition formed on one surface thereof, and the layer is obtained from a paste containing the powder of the oxidizable metal, the powder of the carbon material, the water, and the electrolyte.

(ii) A papermaking body containing the powder of the oxidizable metal, the powder of the carbon material, the water, the electrolyte, and the fiber material.

The exothermic composition in (i) above or the heating element in (ii) above has a ratio of the contained mass of constituent materials other than water to the contained mass of water (constituent materials other than water/water), preferably 0.5 or more, more preferably 0.9 or more, even more preferably 1 or more,

The heating implement according to any one of the above <1> to <5>, wherein the temperature is preferably 1.5 or less, more preferably 1.3 or less, and even more preferably 1.2 or less.

＜7＞

The heating element is accommodated in a flat wrapping material,

One side of the wrapping material is composed of a sheet material having an air permeability of 0 sec/100 mL or more and 5000 sec/100 mL or less as measured in accordance with the provisions of JIS P8117, according to any one of <1> to <6> above. Heating bulb.

＜8＞

The sheet material has an air permeability measured according to the provisions of JIS P8117, more preferably 10 seconds/100 mL or more, further preferably 20 seconds/100 mL or more, and even more preferably 30 seconds/100 mL or more,

The heating device according to <7> above, more preferably 3000 seconds/100 mL or less, further preferably 1500 seconds/100 mL or less, even more preferably 100 seconds/100 mL or less.

＜9＞

The other side of the wrapping material is composed of a second sheet material,

The second sheet material preferably has an air permeability measured according to the provisions of JIS P8117 of 10000 seconds/100 mL or more, more preferably 25000 seconds/100 mL or more, and even more preferably 80000 seconds/100 mL or more. The heating device described in 7> or <8>.

＜10＞

The heating implement according to any one of <7> to <9> above, wherein a layer containing powder of an absorbent resin is disposed between the heating element and the wrapping material.

＜11＞

The heating element is composed of a base sheet and a layer of a heating composition formed on one surface of the base sheet,

The layer of the exothermic composition is obtained from a paste containing the powder of the oxidizable metal, the powder of the carbon material, water, and an electrolyte,

The heating implement according to any one of <1> to <10>, further comprising a layer containing powder of an absorbent resin adjacent to the layer of the heat-generating composition.

＜12＞

The heating implement according to <10> or <11> above, wherein the layer containing the powder of the water absorbent resin is formed by sandwiching the water absorbent resin between two moisture-permeable sheets.

＜13＞

The moisture permeable sheets are each independently preferably 2000 g/(m2·24 h) or more, more preferably 2500 g/(m2·24 h) or more, more preferably 3000 g/(m2·24 h) or more. ) The heating device described in <12> above.

＜14＞

The heating appliance according to any one of <1> to <13> above, which generates steam from the heating element itself as heat is generated.

＜15＞

The heating appliance according to <14> above, wherein the amount of water vapor generated for 10 minutes from the start of heat generation is 70 mg/10 min or more.

＜16＞

The amount of water vapor generated is preferably 130 mg/10 min or more, more preferably 180 mg/10 min or more, even more preferably 185 mg/10 min or more, and even more preferably 190 mg/10 min or more,

The heating device according to <15> above, which is 300 mg/10 min or less.

＜17＞

The heating appliance according to any one of <1> to <16> above, wherein the duration of the temperature of 38°C or higher is 5 minutes or more and 30 minutes or less.

＜18＞

The heating implement according to <17> above, wherein the duration is more preferably 20 minutes or more and 27 minutes or less.

＜19＞

The heating device according to any one of <1> to <18> above, which is of the eye mask type.

Example

Hereinafter, the present invention will be described in more detail by way of examples. However, the scope of the present invention is not limited to these examples. In the table, blank spaces indicate “not included.”

[Examples 1 to 9 and Comparative Example 1]

＜Preparation of paint＞

Iron powder (RKH3, manufactured by DOWA IP Creations Co., Ltd., average particle size: 45 ㎛) as the oxidizable metal powder, and activated carbon powder (Carborafine, manufactured by Osaka Gas Chemical Co., Ltd., average particle diameter: 31 ㎛) as the carbon material powder, Water, electrolyte, and thickener were mixed in the ratio shown in Table 1 below to obtain a paste of an exothermic composition having a viscosity of 5000 mPa·s at 25°C as measured with a type B viscometer.

＜Manufacture of heating element＞

As the first moisture permeable sheet, particles of an absorbent resin (Aqualic (registered trademark) CA, manufactured by Nippon Catalyst Co., Ltd.) were layered with a basis weight of 50 g/m2 on wood pulp paper (basis weight 20 g/m2, manufactured by Inogami Co., Ltd.). It was distributed as follows. On the water-absorbent resin layer, wood pulp paper (basis weight 30 g/m2, manufactured by Inogami Co., Ltd.) was laminated as a second moisture-permeable sheet, and a sheet of water-absorbent resin layer was obtained.

As a base sheet, thin paper laminated with polyethylene (manufactured by Nitto Co., Ltd.) was used, and the above-described paste was applied to one side of the sheet using a die coating method while adjusting the discharge pressure in an application area of 24.0 cm2. Thus, a sheet-like coating was obtained.

After that, sodium chloride (sodium chloride manufactured by Otsuka Pharmaceutical Co., Ltd., Japanese Pharmacopoeia) was uniformly dispersed on the paste side so that the content was shown in Table 1. After that, an absorbent resin sheet was laminated on the paste side to obtain a laminate precursor. Then, the obtained laminate precursor was cut to a size of 49 mm x 49 mm to obtain a laminate in which an absorbent resin layer was disposed on the heating composition side of the coating-type heating element.

Subsequently, the laminate was sandwiched between a breathable first sheet material and a non-ventilated second sheet material each cut to 63 mm This configuration is illustrated in Figure 2(a). The first sheet material was used having an air permeability shown in Table 1 below.

The first sheet material in the wrapping material was arranged so that its inner surface and the outer surface of the sheet of the absorbent resin layer faced each other. In addition, the second sheet material in the wrapping material was arranged so that its inner surface and the surface on which the base sheet existed were opposed to each other.

Finally, a front sheet made of needle-punched nonwoven fabric (basis weight 80 g/m2) and a back sheet made of air-through nonwoven fabric (basis weight 30 g/m2) are bonded to hold the heating element contained in the wrapping material, as shown in FIGS. 4 to 4. A heating element of the eye mask type having the structure illustrated in Figure 7 was obtained.

The top sheet was arranged so that its inner surface and the outer surface of the first sheet material in the wrapping material faced each other. Additionally, the back sheet was arranged so that its inner surface and the outer surface of the second sheet material in the wrapping material faced each other. This heating element is formed to generate steam from the heating element as heat is generated.

[Example 10 and Comparative Example 2]

In addition to the oxidizable metal, carbon material, and water used in Example 1, a mixture containing pulp fibers (softwood kraft pulp, manufactured by Skina Co., Ltd., brand name "Skina", average fiber length: 2.1 mm) as a fiber material was made into paper. Thus, the intermediate molded body was prepared. Thereafter, an electrolyte (sodium chloride) was contained in the intermediate molded body to form a papermaking type heating element having the raw material ratios shown in Table 1 below.

Then, a heating element was formed in the same manner as in Example 1 using a breathable sheet material constituting the wrapping material with an air permeability shown in Table 1 below.

This configuration is illustrated in FIG. 1(b).

[Examples 11 to 15]

A heating device was manufactured in the same manner as in Example 6, except that the content of sodium chloride or the content of the carbon material was changed when producing the paste of the heat-generating composition.

[Example 16]

A heating device was manufactured in the same manner as in Example 3, except that the first sheet material constituting the wrapping material was changed to one with an air permeability shown in Table 1 below.

[Measurement of water vapor generation amount]

The amount of water vapor generated in the heating appliances of the examples and comparative examples was measured using the device 100 shown in FIG. 12 according to the method described above. The greater the amount of steam generated, the more comfortable heat is provided to the object to be heated. The results are shown in Table 1 below.

〔Measurement of duration above 38℃ and maximum temperature reached〕

The duration of time above 38°C and the highest attained temperature in the heating appliances of Examples and Comparative Examples were measured by the following methods in an environment of room temperature of 20°C and humidity of 50%RH. First, the heating bulb that was sealed in the oxygen blocking pack was opened and the oxygen blocking pack was opened to take out the heating bulb.

With the heating device in contact with the eyes of the wearer (expert panelist) and the skin nearby, the measurement surface of the temperature sensor of a data collection thermometer (LT-8, manufactured by Gram) is attached to the upper eyelid of the wearer, It was fixed with tape. Next, with the thermometer measuring device connected to the temperature sensor, the temperature was measured over time. The temperature was measured at 10-second intervals using the start of heat generation as the start of measurement, and the measurement was performed for a total of 60 minutes.

The longer the skin temperature of 38°C or higher persists, the better the temperature sustainability due to heat generation, and the higher the maximum temperature achieved, the better the temperature characteristics due to heat generation. The results are shown in Table 1 below.

[Evaluation of usability]

The heating devices of Examples and Comparative Examples were each worn by four expert panelists and evaluated for feeling of use based on the following criteria. The criteria evaluated by the majority of expert panelists were adopted as a comprehensive evaluation. The comprehensive evaluation is shown in Table 1.

＜Evaluation criteria for usability＞

A: From the beginning to the end of using the heating appliance, a pleasant warmth can be perceived, and the feeling of use is excellent.

B: When using a heating appliance, it feels hot or lukewarm, but the heat can be perceived, so there is no problem.

C: When using a heating device, it is too hot or no heat is felt, giving a bad feeling in use.

As shown in Table 1, the heating appliance of each example is provided with a heating element in which the content ratio of one or more of the constituent materials of the heating element is in a specific relationship, so that the content of the oxidizable metal in the heating appliance is equivalent to that of the heating appliance in the comparative example. Despite this, it can be seen that the temperature characteristics and temperature sustainability due to heat generation are excellent.

In particular, Example 6, in which the content ratio of the constituent materials of the heating element was set to a desirable range, had good temperature characteristics and temperature sustainability, and also had a significantly higher amount of water vapor generation compared to the other examples, making it a more desirable configuration as a heating device. Able to know.

Therefore, it can be seen that the heating implement of the present disclosure can be manufactured with excellent temperature characteristics and temperature sustainability by suppressing the manufacturing cost without increasing the content of the expensive oxidizable metal.

Industrial applicability

A heating appliance is provided that is excellent in temperature characteristics and amount of water vapor generated by heat generation while suppressing manufacturing costs.

Claims (8)

A heating element containing a powder of an oxidizable metal, a powder of a carbon material, water, and an electrolyte is provided,
The heating element is a sheet-like material,
In the heating element, the ratio of the contained mass of the water to the contained mass of the oxidized metal powder multiplied by 100 [100 × (water/oxidized metal powder)] is 95 or more and 130 or less,
The heating element is a heating device in which the ratio of the contained mass of the water to the contained mass of the powder of the carbon material is 6 or more and 30 or less. According to claim 1,
Contains sodium chloride as the electrolyte,
A heating appliance wherein the ratio of the mass of water contained to the mass of sodium chloride is 3.5 or more and 20.0 or less. According to claim 1,
The heating element is accommodated in a flat wrapping material,
A heating device, wherein one side of the wrapping material is made of a sheet material having an air permeability of 0 sec/100 mL or more and 5000 sec/100 mL or less as measured in accordance with the provisions of JIS P8117. According to claim 3,
A heating appliance, wherein a layer containing powder of an absorbent resin is disposed between the heating element and the wrapping material. According to claim 1,
The heating element is composed of a base sheet and a layer of a heating composition formed on one surface of the base sheet,
The layer of the exothermic composition is obtained from a paste containing the powder of the oxidizable metal, the powder of the carbon material, water, and an electrolyte,
A heating appliance, adjacent to the layer of the heat-generating composition, further comprising a layer containing powder of an absorbent resin. According to claim 1,
A heating device that generates steam from the heating element itself in conjunction with heat generation. According to claim 6,
A heating device with a water vapor generation amount of 70 mg/10 min or more for 10 minutes from the start of heat generation. According to claim 1,
A heating device with a duration of temperature above 38℃ for not less than 5 minutes but not more than 30 minutes.