KR20230121929A - heating bulb - Google Patents

Abstract

The heating implement 1 includes a heating element 3 containing powder of an oxidizable metal 3a, powder of a carbon material 3b, water, and an electrolyte. The heating element 3 is a sheet-like object. In the heating element 3, it is preferable that the value obtained by multiplying the mass ratio of water to the oxidizable metal 3a by 100 is 95 or more and 130 or less. In the heating element 3, it is preferable that the content mass ratio of water to the carbon material 3b is 6 or more and 30 or less. It is also preferable that the heating implement 1 further includes a cover material 35, and a layer of an absorbent resin 37 is disposed between the heating element 3 and the cover material 35.

Description

heating bulb

The present invention relates to a heating device.

Heating tools using heat generated by an oxidation reaction of an oxidizable metal are used for various purposes. The present applicant first proposes a steam heating device comprising a heat generating layer made of a heat generating composition containing an oxidizable metal, water, and a water retention agent, a heat generating part formed by laminating a repair sheet containing a polymer, and a pack body accommodating the heat generating part. (See Patent Document 1). This document also discloses that the mass ratio of water contained in the entire heating implement to 100 parts by mass of the oxidizable metal is 40 parts by mass or more and 80 parts by mass or less.

Japanese Unexamined Patent Publication No. 2013-146554

The present invention relates to a heating implement.

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

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

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

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

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

In recent years, demand for heating implements has increased, and technologies such as improving temperature characteristics due to heat generation, maintaining temperature stability, and increasing the amount of steam generation have been studied. As a method for improving the temperature characteristics due to heat generation, a method of increasing the content of the oxidizable metal can be cited, for example, but in this case, the manufacturing cost increases or the mass of the target heating implement increases. . The heating implement disclosed in Patent Literature 1 has improved temperature characteristics due to heat generation, but it is desirable to further improve the temperature characteristics, temperature continuity, and amount of steam generation due to heat generation while reducing manufacturing cost.

As a result of intensive studies by the present inventors on the improvement of temperature characteristics, temperature continuity, and amount of steam generated by heat generation, unexpectedly, in that the amount of water is increased while containing electrolyte, while suppressing manufacturing cost, temperature characteristics and temperature by heat generation It was found that it is possible to manufacture a heating implement with good durability and a good amount of steam generation.

Accordingly, the present invention relates to a heating implement having excellent temperature characteristics, temperature continuity, and an amount of water vapor generated by heat generation while suppressing manufacturing costs.

The term "temperature characteristics" in the present disclosure means that the heating implement has a high maximum temperature reached by heat generation, and the maximum temperature is preferably 38°C or more and 42°C or less. This makes it easy to transfer or delay heat to the object to be heated at an early stage.

In addition, "temperature sustainability" in the present disclosure means that a heating implement maintains a predetermined temperature or higher for a long time due to heat generation, and the predetermined temperature is preferably 38°C or higher. In this way, it is possible to easily transmit or delay heat to the object to be heated for a long time.

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

Examples of the object to be heated include an article having a hard surface, or human eyes, mouth, nose and surrounding skin or mucous membranes, or throat, eyes, scalp, neck, arms, shoulders, legs, knees, It may be skin or mucous membranes in parts such as the abdomen, back, waist, buttocks, etc., but is not limited thereto and is applicable.

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

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

(b) An adhesive form configured to be retained on the neck, arms, shoulders, legs, elbows, knees, forehead, abdomen, back or waist.

(c) In the form of a face mask configured to be retainable over and around the mouth, nose, or across the face.

(d) A shape of a cup configured to fit against the mouth, nose and surroundings.

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

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

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

The powder of the oxidizable metal has a function of generating heat associated with an oxidation reaction with oxygen in the air and enabling heat to be imparted to the object to be heated.

The powder of the carbon material has a function of efficiently generating heat by accelerating the oxidation reaction of the oxidizable metal.

Water has a function of easily generating an interaction between the powder of an oxidizable metal and a carbon material serving as a catalyst for an oxidation reaction.

The electrolyte has a function of increasing heat generation efficiency when promoting an oxidation reaction of an oxidizable metal.

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

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

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.

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.

Further, 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 element is preferably configured to have a function of generating heat by reacting with oxygen in the air and generating steam heated to a predetermined temperature from the heating element itself along with this heat generation.

In this case, the water contained in the heating element may become water vapor, a part of which is evaporated along with the heat generated from the oxidation reaction of the oxidizable metal.

Examples of the form of the sheet-like heating element include forms (i) and (ii) shown below.

As one form of the heat generating element, (i) a form in which the heat generating element is a sheet-like article composed of a substrate sheet and a layer of a heat generating composition formed on one side of the base sheet is exemplified.

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

In the following description, the shape of the heat generating element in (i) above is also referred to as "application type".

Further, as another form of the heating element, (ii) the heating element contains powder of an oxidizable metal, powder of a carbon material, water and an electrolyte, and preferably further contains a fiber material, and the mixture is molded into a sheet-like material. A super-retardant form can be cited. The heating element in this aspect has the same meaning as the heating composition.

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

As the heating element, any of the forms (i) or (ii) may be used as it is.

Alternatively, you may use what accommodated the heating element of any form of (i) or (ii) in the air permeable wrapping material.

Moreover, it is also preferable that a covering material is what solid does not flow in and out.

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

The shape of the wrapping material is not particularly limited, but it is preferably flat from the viewpoint of making it easy to form a heating implement thinly and improving handleability and fitability.

When the fabric is formed in a flat shape, it is also preferable that at least one side of the fabric is composed of a sheet material having an air permeability measured in accordance with JIS P8117 within a predetermined range.

In one embodiment, it is preferable that one side of the cloth material is constituted by the first sheet material that satisfies the predetermined air permeability described above. It is also preferable that the second sheet material, which has lower air permeability than the first sheet material and does not satisfy the above-described predetermined air permeability, is bonded and formed so that the other side of the cloth material is constituted.

A description of the sheet material and air permeability will be given later.

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

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

In FIGS. 1(a) and (b), each constituent member includes a heating element 3, a heating composition 30, a base sheet 31, a powder of an oxidizable metal (3a), a powder of a carbon material (3b), It is shown as electrolyte 3c, fiber material 33, and wrapping material 35.

In addition, in FIGS. 1(a) and (b), for convenience of description, the electrolyte 3c is shown as being present in the heating element 3 as a solid, but it is not limited to this form. Specifically, a mode in which a part or all of the electrolyte 3c is dissolved in water constituting the heating element and thus the electrolyte 3c cannot be visually recognized is also included in the present disclosure.

In the heating element constituting the heating implement, it is preferable that the content ratio of the oxidizable metal and water is a predetermined content ratio.

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

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

In the present disclosure, "a value obtained by multiplying the ratio of the contained mass of water to the contained mass of oxidizable metal powder by 100" is "100 × (mass of water [g]/mass of oxidizable metal powder [g]) It is calculated by the expression represented by ".

By setting the content ratio of the oxidizable metal and the water as described above, even when the content of the oxidizable metal is lower than that of conventional heating implements, it is possible to develop temperature characteristics by heat generation equal to or higher than those of the conventional ones. In addition to this, it is possible to reduce the manufacturing cost of the heating implement.

In the present disclosure, "reduction in manufacturing cost" means that the content of oxidizable metal contained in the heating element can be reduced while increasing the temperature characteristic due to heat generation to equal or higher than that of conventional heating implements.

Examples of the powder of the oxidizable metal constituting the heating element include powders of iron, aluminum, zinc, manganese, magnesium and calcium. These can be used individually or in combination of 2 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.

As an iron powder, the 1 type(s) or 2 or more types chosen from reduced iron powder and atomized iron powder are mentioned, for example.

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

As the powder of the carbon material constituting the heating element, one having a function for accelerating an oxidation reaction, and specifically, one or more of a function as an oxygen holding supply material and a catalytic function for an oxidizable metal can be used. .

Examples of such a carbon material 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 2 or more types.

Among these, powder of activated carbon is preferably used as the powder of the carbon material from the viewpoint of having a good balance between the oxygen supply ability and the catalytic ability.

From the viewpoint of facilitating generation of water vapor accompanying heat generation of the heating element, the heating element preferably contains an electrolyte.

Examples of the electrolyte contained in the heating element include one or two or more salts 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 standpoint of excellent chemical stability and production cost, as the electrolyte, it is preferable to use one or two or more of tripotassium phosphate, potassium hydroxide, sodium chloride, and potassium chloride, and it is also preferable to contain at least sodium chloride. .

The electrolyte may be used, for example, 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 implement will be described.

In the following description, the components different from those of each embodiment described above are mainly explained, and descriptions of the same components are omitted. In this embodiment, the description of each embodiment described above is appropriately applied to the constituent parts that are not specifically explained.

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

In this embodiment, it is preferable that the heating element contains sodium chloride as an electrolyte, and the ratio of the contained mass of water to sodium chloride is a predetermined ratio.

By setting sodium chloride as an electrolyte and water at a predetermined content ratio, even when the content of the oxidizable metal is lower than that of conventional heating implements, excellent temperature characteristics due to heat generation equal to or higher than those of the conventional ones can be developed. In addition to this, it is possible to reduce the manufacturing cost of a heating implement provided with a heating element.

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 (water/sodium chloride) of the water content to the water content is preferably 3.5 or more, more preferably 5.0 or more, still more preferably 10.0 or more, still more preferably 11.0 or more.

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

By having such a ratio, the oxidation reaction of the oxidizable metal can be sufficiently and continuously progressed, and the heating implement exhibits excellent temperature sustainability due to heat generation. In addition to this, it is possible to reduce the manufacturing cost of the heating implement.

Further, in another embodiment of the heating element in the heating implement, 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 a predetermined ratio.

By setting the water and carbon material to a predetermined content ratio, even when the content of the oxidizable metal is smaller than that of conventional heating implements, excellent temperature characteristics and excellent temperature persistence by heat generation equal to or higher than those of the conventional ones can be expressed. In addition to this, it is possible to reduce the manufacturing cost of the heating implement.

Specifically, from the viewpoint of efficiently accelerating the progress of the oxidation reaction of the oxidizable metal, increasing the amount of heat generated per hour, and further increasing the generation of steam accompanying heat generation, the heating element is a carbon material powder. 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, still more preferably 11 or more, still more preferably 12 or more.

In addition, the ratio of the contained mass of water to the contained mass of the carbon material powder contained in the heating element (water / Carbon material powder) is preferably 30 or less, more preferably 20 or less, still more preferably 15 or less, still more preferably 14 or less.

By having such a structure, the supply of water that promotes the progress of the oxidation reaction of the oxidizable metal and the supply of oxygen in the air can be properly balanced by the pores of the carbon material. The oxidation reaction can proceed sufficiently and continuously, and the heating implement 1 exhibits excellent temperature characteristics due to heat generation. In addition to this, it is possible to reduce the manufacturing cost of the heating implement.

Further, in another embodiment of the heating element in the heating element, the coating type heating composition or the papermaking type heating element has a ratio of the content of water to constituent materials excluding water in a predetermined ratio. It is desirable to be

By setting water and constituent materials other than water at a predetermined content ratio, even when the content of the oxidizable metal is lower than that of conventional heating implements, excellent temperature characteristics due to heat generation equal to or higher than those of the conventional ones can be developed. In addition to this, it is possible to reduce the manufacturing cost of the heating implement.

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

Specifically, the ratio of the content mass of constituent materials other than water to the content mass of water (constituent material other than water/water) is preferably It is 0.5 or more, more preferably 0.9 or more, and still more preferably 1.0 or more.

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

By having such a configuration, the oxidation reaction of the oxidizable metal can proceed sufficiently and continuously, and the heating implement 1 exhibits excellent temperature characteristics due to heat generation. In addition to this, it is possible to reduce the manufacturing cost of the heating implement.

In the heating element (or exothermic composition) in each embodiment described above, the content ratio of oxidizable metal and water, the content ratio of sodium chloride and water, the content ratio of water and carbon material powder, and the ratio of constituent materials other than water to water As for the content ratio, it is preferable that any one of these satisfies the preferable content ratio, and it is more preferable that any two of these satisfy the preferable content ratio, and both of these 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 kept even better, and the oxidation reaction of the oxidizable metal can be sufficiently and continuously progressed. It is possible to efficiently express further excellent temperature characteristics and further superior temperature sustainability due to heat generation equal to or higher than those of the prior art.

In addition to this, it is possible to further reduce the manufacturing cost of the heating element and the heating implement provided with the heating element.

In addition, the production efficiency of the heating element and the heating implement provided with the heating element can be further increased.

Below, the matter commonly applied to each embodiment mentioned above is demonstrated.

From the viewpoint of achieving both the continuous generation of water vapor from the heating element and the proper progress of the oxidation reaction, it is also preferable to further dispose a water absorbing resin in or near the heating element.

From the viewpoint of achieving both the continuous generation of steam from the heating element and the appropriate progress of the oxidation reaction, as well as preventing unintentional drop-off of constituent materials and further increasing manufacturing efficiency, when a water absorbent resin is additionally disposed, a wrapping material is used. Further, it is more preferable that a layer containing a powder of a water absorbent resin is disposed between the exothermic composition and the wrapping material in the heating element.

Each aspect described above can be applied to either the coating type or the papermaking type.

By further disposing the water absorbing 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 be efficiently promoted, the temperature characteristics and temperature continuity due to heat generation can be improved, and the moisture retained in the water absorbent resin and the heating element can be continuously released as steam. , It is possible to impart a pleasant sense of warmth to the user of the heating implement.

When the water absorbing resin is further disposed in or near the heating element, as one aspect of the existence mode of the water absorbing resin, for example, the powder of the water absorbing resin is each of the oxidizable metal and the carbon material of the heating composition in the heating element An aspect in which it exists in a mixture with powder, water, and electrolyte may be mentioned. In this case, the powder of the water absorbent resin constitutes a part of the heating element.

Instead of this, as another aspect of the existence aspect of the water absorbing resin, an aspect in which a layer containing powder of the water absorbing resin exists adjacent to the heating element can be exemplified. In this case, the layer containing the powder of the water absorbent resin is configured separately from the heating element.

As an aspect in which the layer containing the powder of the water absorbent resin exists adjacent to the heating element, for example, (a) an aspect having a single layer formed by sandwiching the powder of the water absorbent resin between two moisture-permeable sheets, (b) water absorbent An aspect in which the powder of the resin is disposed in a single layer form in contact with the exothermic composition constituting the heating element without intervening other members, or (c) a first water absorbent resin layer in which the powder of the water absorbent resin is adjacently arranged in a layer form; Adjacent to the first water-absorbent resin layer, a laminated structure in which a second water-absorbent resin layer formed by sandwiching powder of a water-absorbent resin between two moisture-permeable sheets is disposed, and a heat-generating composition constituting a heating element and other members are not intervened. aspects can be cited.

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

Alternatively, as another aspect of the existence aspect of the water absorbing resin, an aspect in which the layer containing the powder of the water absorbing resin is disposed as a base sheet and exists adjacent to the layer of the exothermic composition in the heating element is exemplified. . In this case, the powder of the water absorbent resin constitutes a part of the heating element.

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

When the layer containing the powder of the water absorbing resin is arranged as a base sheet, from the viewpoint of preventing the constituent materials from falling off unintentionally, it is preferable that the layer containing the powder of the water absorbing resin is contained in the wrapping material together with the heating element. .

In the case of providing a cloth material, the cloth material is bonded and formed so that one side is constituted by a first sheet material having air permeability and the other side is constituted by a second sheet material having 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 powder of the water absorbing resin is disposed as a base sheet and includes a covering material, it is more preferable that the layer containing the powder of the water absorbing resin and the first sheet material having air permeability in the covering material face each other. .

Regarding the mode of existence of the heating element and the water absorbing resin, an embodiment in which a layer containing powder of the water absorbing resin exists adjacent to the heating element is illustrated in FIGS. 2(a) to (c).

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

In addition, although the heat generating element 3, the water absorbent resin layer 3L, and the wrapping material 35 shown in FIGS. 2(a) to (c) are drawn differently in thickness as a whole, they are only shown as such for convenience of explanation, and The actual heat generating element 3, the water absorbent resin layer 3L, and the wrapping material 35 in each aspect 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 the two moisture-permeable sheets 38 and 38. It is preferable to be formed by being pinched by. In this case, it is also preferable that the water absorbent resin layer 3L is in contact with the exothermic composition 30 constituting the exothermic element 3 via the moisture permeable sheet 38.

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

By having such a configuration, it is possible to continuously release water vapor while continuously expressing excellent temperature characteristics due to heat generation, and to generate more water vapor than conventional heating devices, so that heating objects such as eyes, nose, and throat feel comfortable. It can be continuously perceived by coexisting a good sense of warmth and moisture.

The configuration in the absorbent resin layer, for example, is preferably applied to a heating device in the form of an eye mask or adhesive, so that the user's eyes and surroundings continue to feel a sense of warmth, and the user It is advantageous in that it can give a good mood to the person.

Instead, as shown in FIG. 2(b), in the water absorbing resin layer 3L, the water absorbing resin 37 is in contact with the exothermic composition 30 constituting the heating element 3 without intervening other members. It is also preferable to be arranged in a layered manner.

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

By having such a configuration, since more steam can be generated than conventional heating devices, the amount of steam generated is further increased, and a pleasant sense of warmth and moistness are achieved in both the eyes, nose, mouth, and throat to be heated. There is an advantage to being able to do it.

The configuration in the absorbent resin layer, for example, is applied to a heating device, preferably in the form of a face mask, to give a wide range of sensations of warmth and moistness to the user's mouth and nose and their surroundings, giving the user a good feeling. It is advantageous in that it can give

Alternatively, as shown in FIG. 2(c), the water absorbing resin layer 3L is adjacent to the exothermic composition 30 constituting the heating element 3 and the water absorbing resin 37 without intervening other members. The disposed first water absorbent resin layer 3s, and the second water absorbent resin layer formed adjacent to the first water absorbent resin layer 3s, the water absorbent resin 37 sandwiched between two moisture permeable sheets 38, 38 ( 3t) is preferably a laminated structure arranged.

In detail, it is preferable that the exothermic composition 30 constituting the exothermic 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 absorbing resin layer 3L has a laminated structure in which the first water absorbing resin layer 3s and the second water absorbing resin layer 3t are disposed in contact with each other.

By having such a configuration, the exothermic reaction of the heating element can be efficiently promoted and a large amount of water vapor can be generated in a relatively short time. can make it

The configuration in the water absorbent resin layer is, for example, preferably applied to a cup-shaped heating implement, in that it can intensively impart a sense of warmth and moisture to the user's mouth and nose and its surroundings in a short period of time. It is advantageous.

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

In the embodiment shown in FIG. 3 , a water absorbent resin layer 3L is disposed between the exothermic 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 such that the water absorbent resin 37 is sandwiched between two moisture permeable sheets 38 and 38 .

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

As shown in Fig. 3, when the water absorbent resin layer 3L is disposed as a base sheet 31 and includes a flat cloth material 35, the water absorbent resin layer 3L and an agent having air permeability in the cloth material It is more preferable that one sheet material is arranged so that it faces.

By having such a configuration, it is possible to continuously release water vapor while continuously expressing excellent temperature characteristics due to heat generation, and to generate more water vapor than conventional heating devices, so that heating objects such as eyes, nose, throat, etc. It can be continuously perceived by coexisting a good sense of warmth and moisture.

The configuration in the absorbent resin layer, for example, is preferably applied to a heating device in the form of an eye mask or adhesive, so that the user's eyes and surroundings continue to feel a sense of warmth, and the user It is advantageous in that it can give a good mood to the person.

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

Specific examples of the water absorbent resin include at least one of polyacrylic acid and salts thereof, such as polymers or copolymers of starch, crosslinked carboxymethylated cellulose, acrylic acid or alkali metal acrylic acid salt, and polyacrylate graft polymers.

As the polyacrylate, a sodium salt can be used.

Further, as the shape of the water absorbent resin, there may be mentioned spherical, bulky, grape-like, fibrous, or particles comprising a combination thereof.

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

As the moisture permeable sheet, for example, fiber sheets such as thin paper, absorbent paper, and nonwoven fabric, mesh sheets, and the like can be used.

The moisture permeable sheet preferably has air permeability.

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

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

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

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

When the water absorbent resin is used as a powder, the average particle diameter of the particles constituting the powder may be within the range commonly used in the present art.

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

In the case where the heating element is a sheet-like article of papermaking type composed of a fiber material, as the fiber material, natural and synthetic fiber materials can be used without particular limitation.

Natural fiber materials include plant fibers (cotton, Hong Kong palm, wood pulp, non-wood pulp, peanut protein fiber, corn protein fiber, soybean protein fiber, mannan fiber, rubber fiber, hemp, manila hemp, sisal hemp, New Zealand hemp, napoma, palm, sirloin, straw, etc.), animal fibers (wool, goat hair, mohair, cashmere, alcapa, angora, camel, vicuna, silk, feather, down, feather, algin fiber, chitin fiber, gauze-in fibers, etc.), and mineral fibers (asbestos, etc.). These fiber materials can be used individually or in combination of two or more.

Examples of synthetic fiber materials include semi-synthetic fibers (acetate, triacetate, oxidized acetate, 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. can be heard These fiber materials can be used individually or in combination of two or more.

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

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

Further, 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 the 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 suspended downward by its own weight, It is measured using a stator, or fixed on a slide for a microscope and measured using a microscope, and the arithmetic average of the obtained measurement results is taken.

The heating element may consist only of oxidizable metal powder, carbon material powder, water and electrolyte, and, if necessary, a fiber material, in addition to various powders, water, and, if necessary, a fiber material, oxidizable metal powder, carbon Powders of materials and powders other than electrolytes may be contained in the exothermic composition.

As another powder, the water absorbent resin etc. mentioned above are mentioned, for example.

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

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

In the case of containing a water-absorbent resin as another powder, its mass is based on the dry mass.

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

The heating implement having the above configuration can accelerate the oxidation reaction of the oxidizable metal by appropriately setting at least one of the above-mentioned content ratios of each material in the heating element, and as a result, integration of the temperature and the duration of heat generation. The sensible heat integration amount represented by is high, and a heating implement excellent in temperature characteristics and temperature continuity by heat generation can be obtained.

In addition, even when the content of oxidizable metals is reduced compared to conventional heating implements, since excellent temperature characteristics and excellent temperature continuity by heat generation can be expressed, the heating implements have temperature characteristics and temperature continuity by heat generation equal to or higher than those of the conventional heating implements. , can be manufactured while suppressing the cost. In addition to this, it becomes a heating device with an excellent amount of water vapor generated from the heating element.

It is preferable that the heating implement includes a main body and a heating element provided in the main body.

It is also preferable that the body portion has a shape that covers the object to be heated during use.

It is preferable that the heating implement has a top sheet positioned closer to the object to be heated and a back sheet positioned farther from the object to be heated.

In detail, it is preferable that the heating implement has a top sheet located on the side close to the user's skin and a back sheet located on the side far from the user's skin.

It is preferable that the body part of the heating implement is constituted by the top sheet and the back sheet.

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

It is also preferable that the heating element is held between the top sheet and the back sheet in a state housed in an air permeable wrapping material.

When the wrapping material is formed of the first sheet material and the second sheet material, it is preferable that the first sheet material having air permeability be disposed close to the object to be heated, in detail, close to the user's skin. In short, it is preferable that the first sheet material is disposed so as to face the top sheet.

When the cloth material is formed of the first sheet material and the second sheet material, the second sheet material having lower air permeability than the first sheet material is disposed on a side farther from the object to be heated, specifically, a side farther from the user's skin. it is desirable In short, it is preferable that the second sheet material is disposed so as to face the back sheet.

It is also preferable that the heating implement is such that steam heated to a predetermined temperature is generated from the heating element. Thus, heat can be applied to the object to be heated and its surroundings.

EMBODIMENT OF THE INVENTION Below, one Embodiment of a heating implement is described with reference to drawings.

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

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

In the following description, the constituent parts different from those of each embodiment described above are mainly explained, and the same reference numerals are assigned to the same constituent parts, and descriptions thereof are omitted. In this embodiment, the description of each structure mentioned above is applied suitably to the component part which is not specifically demonstrated.

The heating implement of the present embodiment is configured to be able to be held on the eye and its periphery. This heating tool is used to provide heat to the eyes and their surroundings by bringing both eyes of a person to be heated into contact with each other during use.

The heating implement is configured to generate steam heated to a predetermined temperature, and thereby heat can be applied to the eye as a heating target and its surroundings.

The heating implement of the present embodiment preferably includes a horizontally elongated main body having a shape that covers both eyes of the user during use, and a heating element provided in the main body.

In addition, it is preferable that the heating implement of this embodiment is provided with a pair of earrings attached to the main body. The covering state of both eyes of the user can be maintained by the ear hook part.

In the following description of the present embodiment, a direction corresponding to the longitudinal direction of the heating implement is also referred to as a transverse direction, and a direction orthogonal to the transverse direction is also referred to as a longitudinal direction.

The heating implements in this embodiment are exemplified as the heating implements 1, the main body 2, the heating element 3, the horizontal direction X and the vertical direction Y in FIG. 4 .

In the heating implement 1 shown in FIG. 4 , ear loops 4 are formed at both outer ends of the main body 2 in the horizontal direction X, and can be inverted outward in the horizontal direction X. In this way, each earring part 4, 4 can be hung on the user's ear, respectively, and the state of covering both eyes of the user by the main body part 2 can be maintained.

From the standpoint of improving wearability, it is preferable that the sheet member constituting the ear loop portion 4 is a sheet having elasticity.

5 shows an exploded perspective view of the heating implement 1 of the present embodiment.

6 shows a cross-sectional view of the heating implement 1 along the horizontal direction X.

The body portion 2 of the heating implement 1 shown in FIGS. 5 and 6 includes a topsheet 5 positioned closer to the user's skin and a backsheet positioned farther from the user's skin ( 6) is a flat one equipped with.

The topsheet 5 constitutes a surface including a portion that comes into contact with a heating object such as a person's eyes, mouth, or nose when the heating implement 1 is used.

The back sheet 6 forms the outer surface of the heating implement 1 as a surface farther from the user's skin. In short, in FIGS. 5 and 6 , the upper side of the page is the side closer to the user's skin, and the lower side of the page is the side farther 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 superimposed state, whereby both sheets 5 and 6 ), the two heat generating elements 3 and 3 are spaced apart from each other in the horizontal direction X and accommodated.

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

The heating element 3 is preferably held between the topsheet 5 and the backsheet 6 constituting the body portion 2 .

Among the topsheet 5 and the backsheet 6, at least the topsheet 5 is preferably composed of a fiber sheet having air permeability.

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 entanglement, fusion and adhesion.

Details of each sheet 5, 6 will be described later.

The fixed state of the heating element 3 is shown in the sectional view shown in FIG.

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 it is also preferable that the heat generating element 3 is accommodated in a cloth material 35 having air permeability.

In this case, it is also preferable that the heating element 3 is held between the top sheet 5 and the back sheet 6 in a state of being accommodated in the air permeable cover material 35 .

It is preferable that the wrapping material 35 is flat. In this case, the fabric material 35 is formed by bonding so that one side is constituted by a first sheet material having air permeability and the other side is constituted by a second sheet material having lower air permeability than the first sheet material. It is also desirable to have

When the cloth material 35 is formed of the first sheet material and the second sheet material, it is preferable that the first sheet material having air permeability be disposed close to the user's skin. In short, it is preferable that the first sheet member is arranged so as to face the topsheet 5.

When the cloth material 35 is formed of the first sheet material and the second sheet material, it is preferable that the second sheet material having lower air permeability than the first sheet material is disposed farther from the user's skin. In short, it is preferable that the second sheet material is disposed so as to face the back sheet 6.

6 illustrates a first sheet material 351 and a second sheet material 352 as sheet materials constituting the cloth material 35 .

When the heating implement 1 includes the wrapping material 35, as shown in FIG. 6, the outer surface of the wrapping material 35 and the inner surface of the backsheet 6 in the heating implement 1 are , It is preferably fixed by adhesive fixing portions 7a and 7a formed by adhesive 7, and the other surfaces are not fixed to backsheet 6.

Each adhesive fixing portion 7a, 7a in the embodiment shown in FIG. 6 is formed in the central region of the heating implement 1 in the lateral direction X and extends along the longitudinal direction Y of the heating implement 1. .

By having such a configuration, when using the heating implement 1, the heating element 3 can be placed on the object to be heated with high fit, and heat can be efficiently applied to the object to be heated.

Returning to FIG. 5 , as shown in the figure, it is preferable that the earring portion 4 is made of a sheet material, and the insertion portion 4A extending in the lateral direction X is formed in the sheet material. .

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

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

As shown in FIGS. 5 and 7 , the ear loop portion 4 is joined to the outer surface of the topsheet 5 in the main body portion 2 at both outer ends in the transverse direction X, and thereby the main body. A joint region 9 where the part 2 and the earring part 4 are joined is formed.

The junction region 9 also functions as a bent portion when the ear loop portion 4 is reversed, using the junction end 9s as an axis.

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

The joint region 9 of the body portion 2 and the earring portion 4 shown in FIGS. 5 and 7 is the body portion ( 2) It is joined continuously to the outer end in the horizontal direction X, and it is preferable to become a substantially semi-elliptic shape.

As shown in FIG. 7 , it is preferable that the bonding region 9 is formed by bonding the topsheet 5 in the body portion 2 and the earring portion 4 to each other.

It is preferable that the junction area|region 9 functions also as a bending part at the time of inverting the earring part 4 with the junction end part 9s as an axis.

Although the bonding area|region 9 shown in FIG. 5 and FIG. 7 is formed by being joined continuously, it may be joined and formed intermittently instead of this.

The heating implement 1 in the form of an eye mask shown in FIGS. 4 to 7 is used, for example, as shown in FIG. 8 , using the earring part 4 to hold the heating implement 1 in the ear. and can be used.

By adopting such a mode of use, steam and heat generated from the heating implement 1 can be uniformly applied to the user's eyes and their surroundings regardless of the user's posture (for example, lying or sitting). This is advantageous in that the versatility of the usage form of the heating implement 1 is improved.

Another embodiment of the heating implement 1 will be described below with reference to FIG. 9 . Fig. 9 shows a heating implement having a so-called pasted shape as an embodiment of the heating implement.

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

About the following description, it demonstrates mainly about the structure part different from each embodiment mentioned above, and the same code|symbol is attached|subjected to the same structure part, and description is abbreviate|omitted. In this embodiment, the description of each structure mentioned above is applied suitably to the component part which is not specifically demonstrated.

Fig. 9 shows an embodiment when the heating implement 1 is in the form of an adhesive.

The heating implement 1 of the present embodiment includes a body portion 2 having a top sheet 5 constituting a skin facing surface during use and a back sheet 6 constituting a non-skin facing surface during use; , It is preferable to provide the heating element 3 provided in the body portion 2.

The heating element 3 is preferably held between the topsheet 5 and the backsheet 6 constituting the body portion 2 .

It is also preferable that the heat generating element 3 is held between the topsheet 5 and the backsheet 6 constituting the body portion 2 in a state of being accommodated in the air permeable cover material 35 .

In this embodiment, it is preferable that the adhesive portion 51 is formed on a part of or the entire outer surface of the topsheet 5 constituting the skin facing surface.

The adhesive portion 51 is for holding the heating implement 1 at a site to which heat and steam generated from the heating implement 1 are applied.

By forming the adhesive portion 51, it can be directly applied to the user's skin or applied to the user's clothing, and the heating implement 1 can be easily held at a predetermined site as a heating target.

In addition, in order to express the adhesiveness of the adhesive portion at a desired timing, a base material such as a film covering the adhesive portion may be provided.

Another embodiment of the heating implement 1 will be described below with reference to FIG. 10 . Fig. 10 shows a heating implement in the form of a so-called face mask as an embodiment of the heating implement.

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

Also in the description below, the constituent parts different from those of each embodiment described above are mainly explained, and the same reference numerals are assigned to the same constituent parts to omit the description. In this embodiment, the description of each structure mentioned above is applied suitably to the component part which is not specifically demonstrated.

10 shows an embodiment when the heating implement 1 is in the form of a face mask.

The heating implement 1 of the present embodiment preferably includes a main body 2 covering at least one of the user's mouth and nose during use, and a heating element 3 provided in the main body 2.

In addition to this, it is preferable that the heating implement 1 of the present embodiment includes a pair of earrings 4 formed at both left and right ends of the main body 2. It is possible to maintain the covering state of at least one of the user's mouth and nose by the ear hook part.

The ear loop part 4 in this embodiment is comprised from the sheet|seat material.

It is preferable that the insertion part 4A is formed in the center area of the earring part 4.

The heating element 3 is preferably held between the topsheet 5 and the backsheet 6 constituting the body portion 2 .

It is also preferable that the heat generating element 3 is held between the topsheet 5 and the backsheet 6 constituting the body portion 2 in a state of being accommodated in the air permeable cover material 35 .

As shown in Fig. 10, the heating implement 1 of the present embodiment preferably has a fold line 15 at a position corresponding to the amount of the user's nose.

The fold line 15 in this embodiment is formed in the central area of the main body 2 of the heating implement 1 in the horizontal direction.

By having such a configuration, when the heating implement 1 in the form of a face mask is used, the topsheet 5 can be brought into close contact along the convex shape of the nose with the fold line 15 as a flexible axis. Therefore, it is difficult to create a gap between the heating implement 1 and the object to be heated, and the heating and humidifying effect can be enhanced.

Instead of this, it is good also as the heating implement 1 of flat shape which does not have the fold line 15 according to a use etc.

The heating implement 1 of the present embodiment can be used by holding the heating implement 1 in the ear by using the earring portion 4 as a method of using the heating implement 1 .

Another embodiment of the heating implement 1 will be described below with reference to FIG. 11 . Fig. 11 shows a heating implement having a so-called cup shape as an embodiment of the heating implement.

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

Also in the description below, the constituent parts different from those of each embodiment described above are mainly explained, and the same reference numerals are assigned to the same constituent parts to omit the description. In this embodiment, the description of each structure mentioned above is applied suitably to the component part which is not specifically demonstrated.

11 shows an embodiment when the heating implement 1 is in the form of a cup.

The heating implement 1 of the present embodiment preferably includes a body portion 2 that covers at least one of the user's mouth and nose during use, and a heating element 3 provided in the body portion 2. .

The heating implement 1 of the present embodiment may or may not have an earring portion capable of holding at least one of the user's mouth and nose covered, depending on its use.

As shown in FIG. 11 , in the heating implement 1 in the present embodiment, a first panel portion 21 and a second panel portion 22 having substantially the same shape as the first panel portion 21 are continuous. It is preferable to have a main body portion 2 configured as such.

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

Both the first panel portion 21 and the second panel portion 22 are composed of a continuous topsheet 5 and a continuous backsheet 6, and between the topsheet 5 and the backsheet 6 It is preferable that the heating element 3 is held in the .

It is also preferable that the heat generating element 3 is held between the topsheet 5 and the backsheet 6 constituting the body portion 2 in a state of being accommodated in the air permeable cover material 35 .

The heating implement 1 in the present embodiment has a boundary line D serving as a flexible axis for bending the body portion 2 at the continuous portion of the first panel portion 21 and the second panel portion 22. it is desirable

In this embodiment, it is preferable that the 1st panel part 21 and the 2nd panel part 22 become line symmetrical about the boundary line D as an axis.

In the heating implement 1 of the present embodiment, the topsheet 5 is bent so as to face each other with the boundary line D as an axis, and the first side edge 21A of the first panel portion 21 and the second panel 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 overlapped, respectively. are joined

In both panel portions 21 and 22, the third side edge 21C of the first panel portion 21 and the third side edge 22C of the second panel portion 22 located on the outside are bonded together. It does not, and forms an opening in the shape of a cup. It is preferable that this opening is open enough to cover the user's nose and mouth.

In this way, a bottomed normal cup-shaped heating implement having the boundary line D and the position near it as the bottom is formed. This cup-shaped heating element has an outer surface formed by a backsheet 6 and an inner surface formed by a topsheet 5.

The cup-shaped heating implement of this embodiment does not have an earring part. In this case, it is preferable that the cup-shaped heating implement with a bottom has dimensions that allow the main body to be gripped by human hands. In short, it is preferable that the cup-shaped heating element is configured so that the main body can be held by human hands.

The cup-shaped heating implement can be used by, for example, holding the main body with a person's hand and holding the opening of the cup-shaped heating implement near the user's nose and mouth during use.

Regardless of the heating implement of any of the embodiments described above, from the viewpoint of suppressing the generation of heat and steam due to the occurrence of an unintended oxidation reaction and maintaining high quality until use, the heating implement is an oxygen blocking pack. As an aspect of a package of a heating implement sealed and housed in a packaging pack such as a back, it is preferable to manufacture, store, and distribute. In the case of a package, it may be an individual package in which one heating implement is housed in one packaging pack, or, if necessary, a package in which a plurality of heating implements are accommodated in one packaging pack.

The various sheet materials used for the earring part, the top sheet and the back sheet, the base sheet, the wrapping material, and the moisture permeable sheet are each independently independent of each other, and their breathability, moisture permeability, texture, elasticity, strength, and the constituent materials of the exothermic composition prevent leakage, etc. It should be determined appropriately in consideration of the nature of

As the sheet material, for example, fiber sheets such as nonwoven fabric, woven fabric, and paper, resin foam sheets, metal sheets, or combinations thereof are used.

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

As the sheet material having high air permeability and moisture permeability, a melt blown nonwoven fabric is preferably used.

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

As the sheet material used for the purpose of imparting strength, a spunbond nonwoven fabric, a spunlace nonwoven fabric, a needle punched nonwoven fabric, a chemical bonded nonwoven fabric, or the like is preferably used.

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

Further, for these sheet materials, desired properties can be expressed by mixing a plurality of fibers having different fiber raw materials, fiber diameters, and degree of crimp of the fibers, or by combining a plurality of sheet materials.

The ear loop part, the top sheet and the back sheet, the base sheet, the wrapping material, and the moisture permeable sheet may each independently have a single structure composed 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. may be

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

From the viewpoint of increasing the production efficiency of the heating implement, at least one of needle punch nonwoven fabric, air through nonwoven fabric, spunbond nonwoven fabric, and chemical bond nonwoven fabric can be preferably used.

When fibrous sheets such as nonwoven fabric are used as the topsheet and the backsheet, it is preferable that both the topsheet and the backsheet have air permeability. "Having air permeability" describes that the air permeability measured according to JIS P8117:2009 is 10000 sec/100 mL or less. Air permeability measured according to JIS P8117 is defined as the time required for 100 mL of air to pass through an area of 6.42 cm 2 under normal temperature and normal pressure.

Specifically, the air permeability of the top sheet and the back sheet are 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 low air permeability means that it does not take time for air to pass through, so it means that the air permeability is high.

By using such a topsheet having 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 desired temperature characteristics and desired temperature continuity by heat generation. A heating device having a can be obtained.

In the case of providing an air permeable covering material, from the viewpoint of appropriately releasing thermal steam to the outside to effectively impart heat to the object to be heated, the sheet material constituting one side of the covering material has an air permeability measured according to the provisions of JIS P8117. , It is preferably more than 0 sec/100 mL, more preferably 10 sec/100 mL or more, still more preferably 20 sec/100 mL or more, and even more preferably 30 sec/100 mL or more.

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

In one embodiment, when an air permeable cloth material 35 is provided, and the cloth material has a first sheet material 351 having air permeability and a second sheet material 352 having lower air permeability than the first sheet material. , the air permeability of the first sheet member 351 preferably satisfies the range described above.

In addition, the air permeability of the second sheet member 352 is preferably 10000 sec/100 mL or more, and more preferably 25000 sec/100 mL or more, and exhibits sufficient and appropriate temperature persistence due to heat generation, so that steam is absorbed into the object to be heated. It is more preferable that it is non-air permeable from a viewpoint of providing sufficient.

"Non-air permeability" describes that the air permeability measured according to JIS P8117:2009 is 80000 sec/100 mL or more.

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

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

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

In the case where a first sheet material having air permeability is provided and the cloth material has air permeability, and a second sheet material having 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/(m 2 ·24 h) or more, more preferably 720 g/(m 2 ·24 h) or more, still more preferably 960 g/(m 2 ·24 h) or more.

Further, the water vapor permeability of the first sheet material measured according to JIS Z0208 is preferably 5000 g/(m 2 24 h) or less, more preferably 4750 g/(m 2 24 h) or less, still more preferably 4500 g /(㎡·24h) or less.

Further, the moisture permeability of the second sheet material measured according to JIS Z0208 is preferably 480 g/(m 2 24 h) or less, more preferably 240 g/(m 2 24 h) or less, still more preferably 0 g /(㎡·24 h).

By setting the moisture permeability of the first sheet material and the second sheet material independently to the above-mentioned ranges, sufficient and appropriate temperature characteristics and temperature persistence due to heat generation are exhibited, and steam can be sufficiently imparted to the object to be heated.

For each sheet material satisfying such a moisture permeability, for example, the same sheet material described in the above-mentioned air permeability can be used.

When a fiber sheet is used as the topsheet, the basis weight of the topsheet is preferably 10 g/m 2 or more, more preferably 30 g/m 2 or more, still more preferably 50 g/m 2 or more.

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

Further, when a fibrous sheet is used 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 printing properties.

Specifically, 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.

The term “moisture permeability” in a moisture permeable sheet describes that the sheet has a moisture permeability of 2000 g/(m 2 24 h) or more as measured according to JIS Z0208.

Specifically, the moisture permeable sheet has a moisture permeability measured according to JIS Z0208 of preferably 2000 g/(m 2 24 h) or more, more preferably 2500 g/(m 2 24 h) or more, still more preferably It is at least 3000 g/(m 2 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 a plurality of moisture-permeable sheets are used, the values of the moisture permeability of each moisture-permeable sheet may be the same or different.

In the heating implement in each embodiment described above, the amount of steam generated (mg/10 min) from the time the heating implement starts generating heat until 10 minutes later (10 minutes) is preferably 70 mg/10 min or more, more preferably Preferably 130 mg/10 min or more, more preferably 180 mg/10 min or more, still more preferably 185 mg/10 min or more, still more preferably 190 mg/10 min or more, and 300 mg/10 min or less is realistic

By having such a configuration, since the amount of steam generated is large, when the heating implement is in the form of an oral mask, it is used as a heating target object such as the mouth, cheeks, nose, throat, etc. inside and outside the mouth and surrounding areas It can be perceived by coexisting a pleasant sense of warmth and moisture.

Such a water vapor generation amount is determined, for example, by adjusting the content ratio of each constituent material of the above-mentioned heating element to an appropriate ratio or by using the water absorbent resin 37 with a configuration as shown in FIG. 2(a) or FIG. 2(b). It can be easily achieved by adopting the arranged structure.

The amount of steam generated is measured using an apparatus 100 having a configuration shown in FIG. 12 .

Apparatus 100 consists of an aluminum measurement chamber 101 (volume: 4.2 L), an inflow passage 102 arranged in communication with the lower part of measurement chamber 101, and an outflow passage arranged in communication with the upper part of measurement chamber 101. (103). The inflow path 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 apparatus 100 includes an inlet thermo-hygrometer 104 and an inlet flow meter 105 formed in the inlet passage 102, an outlet thermo-hygrometer 106 and an outlet flow meter 107 formed in the outlet passage 103, and a measuring chamber. A thermometer (thermistor) 108 formed in 101 is provided. As the thermometer 108, a thermometer having a temperature resolution of about 0.01°C is preferably used.

The method for measuring the amount of steam generated using the apparatus 100 is as follows.

First, targeting the heating implement to be measured sealed in the oxygen blocking pack, the oxygen blocking pack is opened, and then one heating element is taken out. When the heating element is accommodated in the wrapping material, it is taken out in the state of the heating element accommodated in the wrapping material.

It is placed in the measurement chamber 101 so that one surface of the wrapped material of the removed heating element faces the outer surface, and the thermometer 108 is mounted thereon. In the case where one side and the other side of the fabric material are composed of sheets having different air permeability, the surface of the fabric material on the high air permeability sheet (preferably the first sheet material) side faces the outside of the measurement chamber 101. and mount the thermometer 108 on the surface.

In this state, dehumidified air is passed from the lower part of the measurement chamber 101 through the inflow passage 102, and from each temperature and each humidity measured by the inlet thermo-hygrometer 104 and the outlet thermo-hygrometer 106, the measurement chamber 101 Calculate the difference in absolute humidity before and after air distribution of Further, 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. Regarding the amount of water vapor generated, the measurement start time is taken as the time when the heating implement is taken out of the oxygen blocking pack and the heating element is brought into contact with air, and the total amount measured in a predetermined time from that point is taken. Although the predetermined time can be set to 10 minutes, for example, it is not limited to these times and can be set appropriately.

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

By having such a configuration, when using the heating implement, pleasant heat can be more continuously sensed by the user's mouth, cheeks, nose, throat, etc. to the object to be heated, such as the inside of the mouth, the outside of the mouth, and the surrounding area. In addition, it is possible to reduce excessive heating of the object to be heated after use or occurrence of wetting due to excessive adhesion of water vapor. In addition, when the heating implement is applied to the eye and its surroundings, excessive thermal stimulation to the head can be suppressed.

The duration of such a temperature can be easily achieved by adopting a configuration in which the water absorbent resin 37 is disposed in the configuration shown in FIG. 2(a) or FIG. 2(b), for example.

38 degreeC or more duration can be measured by the following method in the environment of room temperature of 20 degreeC, and humidity of 50 %RH, for example.

First, targeting the heating implement to be measured sealed in the oxygen blocking pack, the oxygen blocking pack is opened, and the heating implement is taken out.

Next, the measurement surface of the temperature sensor of the data collection type thermometer (LT-8, manufactured by Gram) is fixed to the object to be heated with tape. In the case where the heating implement is in the form of, for example, an eye mask or adhesive type, and is configured to come into surface contact with the object to be heated during use, the surface of the heating object in contact with the heating implement (for example, the heating implement of the eye mask) , the wearer's upper eyelid) and fixed with tape. Instead of this, for example, if the heating implement is in the form of, for example, a face mask or cup, and has a configuration that has a space with the object to be heated during use, the area to which the heating implement is applied (eg, the heating element of the face mask) If it is a ball, it is attached to the wearer's mouth) and secured with tape. The temperature is measured over time in a state where the measuring instrument of the thermometer is connected to the temperature sensor. The temperature was measured at intervals of 10 seconds with the start of heat generation as the start of measurement, and the measurement was performed for a total of 60 minutes.

From the exothermic profile plotted with the measured temperature (°C) on the vertical axis and the measured time (seconds) on the horizontal axis, the length of time at which the temperature of 38°C or higher was measured is the holding time of 38°C or higher. In addition, when measuring and calculating the highest reaching temperature of a heating implement, the highest temperature measured from the heating profile is taken as the highest reaching temperature.

When the heating implement has an earring part, the shape of the earring part is not limited to the sheet-shaped member shown in Figs. 4 and 5 as long as the body part can be fixed to both eyes of the user.

For example, instead of the earring portion made of a sheet material, an earring portion made of a string-like member may be employed, or an earring portion made of a filamentous or belt-like member may be employed.

From the viewpoint of enhancing the fitting feeling of the heating implement, it is preferable to use an elastic body such as rubber to form the elastic earring portion 4.

Although the form of the heating element in the heating implements of the embodiments shown in Figs. 4, 9, 10 and 11 has been described as a form in which two heating elements are spaced apart and held, a sense of warmth can be imparted to the object to be heated and its surroundings. If there is, 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. .

Incidentally, the heat generating elements shown in Figs. 5 and 6 are not limited to this configuration, although a part thereof is only fixed at the central area in the horizontal direction of the heating implement.

For example, the heating element and the backsheet may be continuously or intermittently bonded with an adhesive in the central area in the horizontal direction and in areas other than the central area, and the adhesive is applied to the entire surface of the backsheet where the heating element is disposed. and may be connected.

As mentioned above, although this invention was demonstrated based on the preferred embodiment, this invention is not limited to the said embodiment.

Regarding the above-described embodiment of the present disclosure, the following heating implements are further disclosed.

<1>

Equipped with a heating element containing powder of an oxidizable metal, powder of a carbon material, water and an electrolyte,

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 oxidizable metal powder multiplied by 100 [100 × (water/oxidizable metal powder)] is 95 or more and 130 or less,

In the heating element, 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 value [100 × (water/oxidizable metal powder)] is more preferably 98 or more, still more preferably 100 or more, still more preferably 105 or more,

The heating implement according to <1> above, which is more preferably 125 or less, still more preferably 120 or less, and still more preferably 110 or less.

<3>

Containing sodium chloride as the electrolyte,

The heating implement according to <1> or <2>, wherein the ratio of the content mass of the water to the content 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, still more preferably 11.0 or more,

The heating implement according to <3> above, more preferably 18.0 or less, still more preferably 15.0 or less.

<5>

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

The heating implement according to any one of the above <1> to <4>, which is more preferably 20 or less, still more preferably 15 or less, still more preferably 14 or less.

<6>

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

(i) It is composed of a base sheet and a layer of an exothermic 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 superstructure comprising the powder of the oxidizable metal, the powder of the carbon material, the water, the electrolyte, and a fiber material.

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

The heating implement according to any one of <1> to <5>, which is preferably 1.5 or less, more preferably 1.3 or less, and still more preferably 1.2 or less.

<7>

The heating element is housed 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 according to the provisions of JIS P8117, <1> to <6> according to any one of heating bulb.

<8>

The sheet material has an air permeability measured according to JIS P8117, more preferably 10 sec/100 mL or more, still more preferably 20 sec/100 mL or more, still more preferably 30 sec/100 mL or more,

The heating implement according to <7> above, more preferably 3000 sec/100 mL or less, still more preferably 1500 sec/100 mL or less, still more preferably 100 sec/100 mL or less.

<9>

The other surface of the cloth material is constituted by a second sheet material,

The second sheet material preferably has an air permeability of 10000 sec/100 mL or more, more preferably 25000 sec/100 mL or more, and still more preferably 80000 sec/100 mL or more, as measured by the provisions of JIS P8117. The heating implement described in 7> or <8>.

<10>

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

<11>

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

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 a water absorbent resin powder adjacent to the layer of the exothermic composition.

<12>

The heating implement according to <10> or <11>, 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 sheet is each independently preferably 2000 g/(m 2 24 h) or more, more preferably 2500 g/(m 2 24 h) or more, still more preferably 3000 g/(m 2 24 h). ) or more, the heating implement according to <12> above.

<14>

The heating implement according to any one of <1> to <13>, wherein steam is generated from the heating element itself along with heat generation.

<15>

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

<17>

The heating implement according to any one of <1> to <16>, 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>, wherein the duration is more preferably 20 minutes or more and 27 minutes or less.

<19>

The heating implement according to any one of <1> to <18>, which is an eye mask type.

Example

Hereinafter, the present invention will be described in more detail by examples. However, the scope of the present invention is not limited to these examples. In the table, blank positions indicate "non-contained".

[Examples 1 to 9 and Comparative Example 1]

<Preparation of paint>

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

<Manufacture of heating element>

As the first moisture-permeable sheet, particles of a water-absorbent resin (Aqualic (registered trademark) CA, manufactured by Nippon Catalyst Co., Ltd.) are layered with a basis weight of 50 g/m 2 on wood pulp paper (basic weight 20 g/m 2 , manufactured by Inogami Co., Ltd.) was spread out. On the water absorbent resin layer, as a second moisture permeable sheet, wood pulp paper (basic weight: 30 g/m 2 , manufactured by Inogami Co., Ltd.) was laminated to obtain a sheet of water absorbent resin layer.

As a substrate sheet, thin paper (manufactured by Nittoku Co., Ltd.) laminated with polyethylene is used, and the paste is applied to one side of the sheet in a range of 24.0 cm 2 by the die coating method while adjusting the discharge pressure of the above-mentioned paste. Thus, a sheet-like coated product was obtained.

Thereafter, sodium chloride (manufactured by Otsuka Pharmaceutical Co., Ltd., sodium chloride from the Japanese Pharmacopoeia) was uniformly spread on the paste side so as to have a content shown in Table 1. Thereafter, a water absorbent resin sheet was laminated on the paste side to obtain a laminate precursor. Then, the obtained laminate precursor was cut into a size of 49 mm × 49 mm to obtain a laminate in which a water absorbent resin layer was disposed on the exothermic composition side of an application-type heating element.

Next, a laminate was sandwiched between a first sheet material having air permeability and a second sheet material that was non-air permeability, respectively cut to 63 mm x 63 mm, and the four sides of these sheet materials were heat-sealed to obtain a heating element housed in the wrapping material. This configuration is illustrated in Fig. 2(a). As the first sheet material, one having air permeability shown in Table 1 below was used.

The first sheet material in the cloth material was arranged so that its inner surface and the outer surface of the sheet of the water absorbent resin layer faced each other. Moreover, the 2nd sheet material in a cloth material was arrange|positioned so that the inner surface and the surface of a base material sheet may face each other.

Finally, a top sheet made of a needle punched nonwoven fabric (basic weight 80 g/m 2 ) and a back sheet made of an air-through nonwoven fabric (basic weight 30 g/m 2 ) are bonded so as to hold the heating element accommodated in the fabric material, and FIGS. A heating implement of an eye mask type having the structure exemplified in Fig. 7 was obtained.

The topsheet was arranged so that its inner surface and the outer surface of the first sheet material in the wrapping material faced each other. In addition, the back sheet was arranged so that the inner surface thereof and the outer surface of the second sheet material in the wrapping material faced each other. This heating implement is formed so as to generate steam from the heating element along with heat generation.

[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., trade name “SKINA”, average fiber length: 2.1 mm) as a fiber material was made into paper. Thus, the intermediate molded body was irritated. 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.

And, as an air permeable sheet material constituting the cloth material, a heating implement was formed in the same manner as in Example 1 using an air permeability sheet material shown in Table 1 below.

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

[Examples 11 to 15]

A heating implement 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 preparing the paste of the exothermic composition.

[Example 16]

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

[Measurement of water vapor generation amount]

The amount of water vapor generated in the heating implements of Examples and Comparative Examples was measured using the device 100 shown in FIG. 12 according to the method described above. The larger the amount of steam generated, the more comfortable heat is sufficiently imparted to the object to be heated. A result is shown in Table 1 below.

[Measurement of duration of 38 ° C. or higher and maximum temperature reached]

The duration of 38°C or more and the maximum temperature reached in the heating implements 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 implement sealed in the oxygen barrier pack was opened and the heating implement was taken out.

The measurement surface of the temperature sensor of the data collection type thermometer (LT-8, manufactured by Gram) is attached to the wearer's upper eyelid in a state where the heating device is brought into contact with the wearer's (professional panelist's) eye and skin around it, fixed with tape. Next, the temperature was measured over time in a state where the measuring instrument of the thermometer was connected to the temperature sensor. The temperature was measured at intervals of 10 seconds with 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 lasts, the better the temperature continuity by heat generation, and the higher the maximum reached temperature, the better the temperature characteristics by heat generation. A result is shown in Table 1 below.

[Evaluation of usability]

The heating implements of Examples and Comparative Examples were worn by 4 professional panelists, respectively, and the feeling of use was evaluated according to the following criteria. The criteria evaluated by a majority of expert panelists were adopted as comprehensive evaluation. A comprehensive evaluation is shown in Table 1.

<Evaluation criteria for feeling of use>

A: From the start of use to the end of the heating implement, pleasant heat can be perceived, and the usability is excellent.

B: When the heating implement is used, it feels hot or lukewarm, but the heat can be perceived, and the feeling of use is satisfactory.

C: When using a heating implement, it is too hot or does not feel heat, and the usability is bad.

As shown in Table 1, the heating implements of each example are provided with a heating element in which at least one of the content ratios of the constituent materials of the heating element is in a specific relationship, so that the content of oxidizable metal in the heating implement is equal to that of the heating implement of the comparative example. Despite this, it can be seen that the temperature characteristics and temperature persistence 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 within a preferable range, had good temperature characteristics and temperature sustainability, and a significantly higher amount of water vapor generation compared to other examples, which is also a more preferable configuration as a heating device Able to know.

Therefore, it can be seen that the heating implement of the present disclosure can produce a heating implement having excellent temperature characteristics and temperature sustainability by heat generation while reducing the manufacturing cost, without increasing the content of the expensive oxidizable metal.

A heating implement excellent in temperature characteristics and water vapor generation amount due to heat generation while suppressing manufacturing cost is provided.

Claims (8)

Equipped with a heating element containing powder of an oxidizable metal, powder of a carbon material, water and an electrolyte,
The heating element is a sheet-like material,
In the heating element, a value obtained by multiplying the ratio of the contained mass of the water to the contained mass of the oxidizable metal powder by 100 [100 × (water/oxidizable metal powder)] is 95 or more and 130 or less,
In the heating element, 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,
Containing sodium chloride as the electrolyte,
The heating implement, wherein the ratio of the contained mass of the water to the contained mass of the sodium chloride is 3.5 or more and 20.0 or less. According to claim 1 or 2,
The heating element is housed in a flat wrapping material,
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 according to JIS P8117. According to claim 3,
A heating implement, wherein a layer containing powder of an absorbent resin is disposed between the heating element and the wrapping material. According to any one of claims 1 to 4,
The heating element is made of a base sheet and a layer of a heating composition formed on one surface thereof,
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 implement further comprising a layer containing powder of an absorbent resin adjacent to the layer of the exothermic composition. According to any one of claims 1 to 5,
A heating implement that generates steam from the heating element itself along with heat generation. According to claim 6,
A heating implement having a water vapor generation rate of 70 mg/10 min or more for 10 minutes from the start of fever. According to any one of claims 1 to 7,
A heating implement having a temperature of 38°C or higher for a duration of 15 minutes or more and 30 minutes or less.