JP2023078617A - Steam heating tool - Google Patents

Abstract

To provide a steam heating tool having a structure in which while the skin of a living body is sufficiently and suitably pressed by protrusion parts, the steam heating tool is made to stably generate heat.SOLUTION: A steam heating tool 100 comprises a breathable sheet 10 comprising two or more protrusion parts 71 curved convexly on the side of one surface 10a, and extending parts 76 curved at a lower height than that of the protrusion parts 71 convexly on the side of the one surface 10a and extending laterally from side surfaces of the protrusion parts 71, and made of nonwoven fabric; and a heat generating body 30 including oxidizable metal powder and water, and packed in internal spaces 75 of the protrusion parts 71 and internal spaces 79 of the extending parts 76.SELECTED DRAWING: Figure 4

Description

The present invention relates to steam heating devices.

Further, Patent Literature 1 describes a sheet-like steam heating device. This steam heating device has a plurality of projections convex on one side, an air permeable sheet, and a heating material containing oxidizable metal powder and water and filled in the projections, The heat generating material is configured to generate heat by supplying oxygen to the heat generating material through the air-permeable sheet.
Patent Literature 2 describes a wearing device that is worn on a human body such as a shoulder or waist.

JP 2018-175857 A JP 2007-54329 A

By the way, by attaching the steam heating device as shown in Patent Document 1 to the human body using the attachment device as shown in Patent Document 2, the protrusions against the skin are pressed against the skin with a strong force. There is a need for stably generating heat from the steam heating device while keeping the biting degree of the portion within an appropriate range. However, when a wearer or the like is used on top of the steam heating device of Patent Document 1, oxygen inflow is blocked and heat generation is not stable. Furthermore, it has been found that there are problems such as the possibility of excessive bite into the skin due to strong force, and the possibility of low-temperature burns to the skin due to overheating of the biting tip over time.

TECHNICAL FIELD The present invention relates to a steam heating tool having a structure capable of stably generating heat while sufficiently and moderately pressing the skin of a living body with projections.

The present invention includes two or more protrusions that are convexly curved on one surface side, and a protrusion that is convexly curved on the one surface side at a height lower than that of the protrusions and is curved from the side surface of the protrusions. an extending portion extending laterally, the air-permeable sheet made of nonwoven fabric, an oxidizable metal powder and water, the inner space of the protrusion and the extending portion; and a heat-generating material filled in the internal space of the part.

According to the present invention, it is possible to stably generate heat from the steam heating tool while sufficiently and moderately pressing the skin of the living body with the protrusions.

1 is a perspective view of a steam heating device according to an embodiment; FIG. 1 is a plan view of a steam heating device according to an embodiment; FIG. 3(a), 3(b) and 3(c) are schematic cross-sectional views of the steam heating device according to the embodiment, of which FIG. 3(a) is the line AA shown in FIG. 3B is a cross-sectional view along the line BB shown in FIG. 2, and FIG. 3C is a cross-sectional view along the line CC shown in FIG. be. It is an expanded sectional view of the A section shown in FIG.3(b). It is an expanded sectional view of the B section shown in FIG.3(c). FIG. 2 is a schematic diagram showing an example of a usage state of the steam heating device according to the embodiment; FIGS. 7(a), 7(b) and 7(c) are perspective views of steam heating implements according to modifications of the embodiment, of which FIG. 7(a) is modification 1 and FIG. b) shows Modification 2, and FIG. 7C shows Modification 3. FIG.

Preferred embodiments of the present invention are described below with reference to the drawings. In addition, in all the drawings, the same constituent elements are denoted by the same reference numerals, and overlapping descriptions are appropriately omitted.

As shown in FIGS. 1 to 5, the steam heating device 100 has two or more protrusions 71 that are convexly curved toward the one surface 10a side, and two or more protrusions 71 that are convexly curved toward the one surface 10a side. The air-permeable sheet 10 made of non-woven fabric and the powder of the oxidizable metal, which has an extension part 76 which is curved at a low height and extends laterally from the side surface of the projection part 71. and water, and the heat generating material 30 (FIG. 4, etc.) filled in the internal space 75 of the projecting portion 71 and the internal space 79 of the extending portion 76 .

The steam heating device 100 is configured such that heat is generated from the heat generating material 30 by supplying oxygen to the heat generating material 30 through the air-permeable sheet 10 .
By attaching the steam heating device 100 to a living body such as a human body with the protrusions 71 pressed against the skin 91 , the skin 91 of the living body is pressed by the protrusions 71 , and the skin 91 of the living body presses against the protrusions 71 . The corresponding area can be sufficiently warmed locally. As a result, for example, even the fascia underlying the skin 91 is stimulated by the pressure from the protrusion 71 and the heat from the exothermic material 30, so that the meridians and acupuncture points can be stimulated by the pressure and heat as in acupuncture and moxibustion. .
Further, the exothermic material 30 hardens (oxidizes) as the exothermic reaction progresses, and the exothermic reaction slows down. The steam heating device 100 is used, for example, from the start of the exothermic reaction of the exothermic material 30 until the exothermic reaction slows down or ends.

According to this embodiment, in addition to the protrusion 71 and the heat-generating material 30, the steam heating device 100 is convexly curved toward the one surface 10a at a height lower than the protrusion 71, and the side surface of the protrusion 71 is curved. It has an extension 76 extending from the .
As a result, when the projection 71 presses the skin 91 of the living body, the top of the extension 76 abuts against the skin 91 . Biting is suppressed (see FIG. 6). Therefore, for example, even if the protrusion 71 is pressed against the skin 91 with a strong force, the extension 76 prevents the entire protrusion 71 from digging into the skin 91 , thereby preventing the protrusion 71 from being pushed into the skin 91 . The degree of biting can be set within a moderate range.
In addition, since a portion of the projection 71 can be kept exposed from the skin 91 by the extension 76, oxygen can be continuously supplied to the heating material 30 in the projection 71, and stable heat generation is possible.
As described above, according to the present embodiment, it is possible to stably generate heat from the steam heating device 100 while sufficiently and moderately pressing the skin 91 of the living body with the protrusions 71 .

Before use, the steam heating device 100 is hermetically housed in a packaging material (not shown). When the packaging material is unsealed and the steam heating device 100 is taken out from the packaging material, oxygen contained in the outside air is supplied to the heat generating material 30 so that the heat generating material 30 generates heat.
Also, the part of the living body to which the steam heating device 100 is attached is not particularly limited. The steam heating device 100 can be attached to the

The steam heating device 100 includes, for example, a second sheet 20 (FIG. 4) laminated on the other surface 10b side of the sheet 10 in addition to the sheet 10 and the heat generating material 30 described above. .
In the following description, in the steam heating device 100, the projecting direction of the protrusions 71 (upward in FIG. 4) will be referred to as the front side, and the direction opposite to the projecting direction of the protrusions 71 (downward in FIG. 4) will be referred to as the rear side. There is The front surface of the steam heating device 100 is the surface that faces the skin 91 when the steam heating device 100 is attached to the living body.
Also, the direction perpendicular to the thickness direction of the steam heating device 100 (horizontal direction in FIG. 4) is sometimes referred to as the horizontal direction. The lateral side is the direction including the horizontal component, and the side surface of the protrusion 71 is the surface facing the direction including the horizontal component and the center side of the protrusion 71 in plan view. The direction containing the component of is the face that is not facing.

Although the planar shape of the steam heating device 100 is not particularly limited, for example, as shown in FIG. 2, it may be rectangular (for example, square) with four chamfered corners. However, the planar shape of the steam heating device 100 may be polygonal, circular, elliptical, or any other shape other than rectangular.

The sheet 10 has a flat sheet-like base 11 . In the case of this embodiment, each of the plurality of projecting portions 71 and the extending portions 76 is convexly curved toward the one surface 10a side of the seat 10 with the base portion 11 as a reference.
The sheet 10 constitutes the outer surface on the front side of the steam heating device 100 . For example, the steam heating device 100 is used with the sheet 10 (especially the protrusions 71) in direct contact with the skin 91 of the living body.

In the case of the present embodiment, the sheet 10 includes, for example, a nonwoven fabric sheet 15 (first nonwoven fabric sheet) forming one outermost layer of the sheet 10 and a nonwoven fabric sheet 17 forming the other outermost layer of the sheet 10 ( a second nonwoven fabric sheet) and a breathable sheet 16 forming an intermediate layer positioned between the first nonwoven fabric sheet and the second nonwoven fabric sheet.
More specifically, in the case of this embodiment, the sheet 10 has a three-layer structure of a nonwoven fabric sheet 15, an air-permeable sheet 16 and a nonwoven fabric sheet 17, as shown in FIGS. 4 and 5, for example.
However, the present invention is not limited to this example, and the sheet 10 may include other three layers of the nonwoven fabric sheet 15 , the ventilation sheet 16 and the nonwoven fabric sheet 17 . Alternatively, the sheet 10 may be composed of a single layer of nonwoven fabric sheet, without the second nonwoven fabric sheet and the breathable sheet 16, for example.
Moreover, these sheets may have a single structure consisting of only one sheet material, regardless of whether it is a single layer or a multilayer, or may have a laminated structure in which two or more types of sheet materials are laminated.

The second sheet 20 constitutes, for example, the outer surface on the rear side of the steam heating device 100 .
The sheet 10 and the second sheet 20 are, for example, formed to have the same planar shape, and are overlapped so that their outlines match each other, and their peripheral edges are joined together.
As a result, the heat generating material 30 is held between the second sheet 20 and the inner peripheral surfaces of the projecting portions 71 and the extending portions 76 of the sheet 10 .

Of the sheet 10 and the second sheet 20 forming the front and rear outer surfaces of the steam heating device 100, for example, the sheet 10 has air permeability, and the air permeability of the sheet 10 has the air permeability of the second sheet 20. higher than
More specifically, as described above, the sheet 10 also has air permeability at the protrusions 71 and the extensions 76, and supplies oxygen to the heat generating material 30 through the protrusions 71 and the extensions 76. In addition, water vapor can be released via the protrusion 71 and the extension 76 .
More specifically, in the case of the present embodiment, the second sheet 20 is, for example, a substantially air-impermeable sheet.

In the present embodiment, the heat generating material 30 includes, for example, an oxidizable metal, a reaction accelerator such as a carbon material such as activated carbon that serves as an oxidation reaction catalyst, and water, and preferably an electrolyte such as a metal salt. consists of The exothermic material 30 reacts with oxygen in the air to generate heat, and with the heat generation, heated steam is generated. In other words, the exothermic material 30 has a function of generating steam as heat is generated.
It is more preferable to contain a water retention agent in the heat generating material 30 in order to generate steam with the heat generation. Excess water in the heat generating material 30 is retained by the heat generating material 30 containing the water retaining agent. Therefore, when the steam heating device 100 is taken out of the packaging material, the oxidation reaction proceeds quickly, the heat generating material 30 generates heat, and the water retained in the water retention agent turns into steam, and the steam can be released for a long time.

Also, the heat generating material 30 may not contain a water retention agent. In this case, the steam heating device 100 may be a water absorbent sheet (not shown) disposed between the sheet 10 and the second sheet 20, for example. It has By containing water and a water retention agent in the water absorbent sheet, the water in the water absorbent sheet becomes steam due to the heat generated by the heat generating material 30, and the steam can be released over a long period of time.
Further, the heat generating material 30 may contain a water retaining agent, and a water absorbing sheet may be provided between the sheet 10 and the second sheet 20 .
Further, the heat generating material 30 may contain iron and carbon components.
The iron referred to here may be at least part of the oxidizable metal, or may be different from the oxidizable metal. The iron referred to here is oxidizable iron.
Further, the carbon material referred to here may be at least a part of the above reaction accelerator.
Further, as various materials constituting the heat generating material 30, for example, materials described in JP-A-2003-102761 and JP-A-2006-340928 can also be used.

In the steam heating device 100 , the heat generating material 30 is filled in the internal space 75 of the projecting portion 71 and the internal space 79 of the extending portion 76 . A heat generating material 30 may be filled between them. However, even in this case, the thickness of the heat generating material 30 at the portion corresponding to each of the projecting portion 71 and the extending portion 76 of the sheet 10 may be greater than the thickness of the heat generating material 30 at the portion corresponding to the base portion 11. preferable.
In the case of this embodiment, the portions of the sheet 10 corresponding to the projections 71 and the extending portions 76 are filled with the heat generating material 30, whereas the portions corresponding to the base portion 11 are substantially filled with the heat generating material. 30 does not exist.

More specifically, in the case of the present embodiment, the heat generating material 30 fills, for example, 70% or more of the area in the height direction of the internal space 75 of the protrusion 71 . That is, as shown in FIG. 4, the height dimension of the region filled with the heat generating material 30 in the internal space 75 is 0.7 times or more H3 with respect to the height dimension H3 of the internal space 75. there is
As a result, the projections 71 can be sufficiently heated, and the skin of the living body can be sufficiently warmed by the projections 71 .
Further, the heat generating material 30 fills, for example, 70% or more of the area in the height direction of the internal space 79 of the extending portion 76 . That is, as shown in FIG. 5, the height dimension of the region filled with the heat generating material 30 in the internal space 79 is 0.7 times or more H4 with respect to the height dimension H4 of the internal space 79. there is
As a result, as will be described later, oxygen can be well supplied to the heat generating material 30 in the projecting portion 71 via the extending portion 76 .

The filling rate of the heating material 30 in the height direction of the internal spaces 75 and 79 is measured using, for example, a laser microscope or a laser displacement meter capable of measuring height differences. A one-dimensional spot type laser displacement meter, a two-dimensional laser displacement meter, a three-dimensional laser displacement meter, or the like can be used as the laser displacement meter. An appropriate laser displacement gauge is selected based on the required measurement distance and laser light spot distance according to the shape and height dimension of the protrusion 71 and the extension 76 . For example, a keyence sensor head IL-300 (measuring distance 160 mm to 450 mm, spot diameter φ500 μm) can be used.

As shown in FIGS. 3(a), 3(b), and 3(c), the shape of the protrusion 71 is not particularly limited, but, for example, it has a tapered shape toward the upper end side. However, it is preferable that the top of the protrusion 71 has a rounded shape.
The shape of the protrusion 71 can be, for example, a conical shape such as a conical shape, an elliptical conical shape or a long conical shape, or a truncated conical shape such as a truncated conical shape, an elliptical truncated conical shape or a long truncated conical shape.
In the case of this embodiment, the shape of the protrusion 71 is formed in a conical shape.
3(a), 3(b) and 3(c) schematically show cross sections of the steam heating device 100. FIG.

As shown in FIGS. 3(a), 3(b), and 3(c), the shape of the extending portion 76 is not particularly limited, but for example, it is tapered toward the upper end side. However, it is preferable that the top of the extending portion 76 has a rounded shape.
In the case of this embodiment, the shape of the extending portion 76 is formed in a triangular prism shape with the extending direction of the extending portion 76 being the axial direction. The top of the extending portion 76 has a ridge line elongated in one direction. Moreover, the height dimension H2 (see FIG. 3C) of the extension 76 is substantially constant regardless of the position of the extension 76 in the extension direction.
However, the shape of the extending portion 76 may be, for example, a polygonal prism other than a triangular prism.

Here, in the case of the present embodiment, the extension portion 76 connects the adjacent projection portions 71 to each other, and the internal spaces 75 of the plurality of projection portions 71 connected via the extension portion 76 are connected to each other. The internal space 79 of the extending portion 76 communicates with each other.
As a result, the oxygen introduced into the internal space 79 of the extension 76 is also introduced into the internal space 75 of the protrusion 71 connected to the extension 76 . That is, when the protrusion 71 is biting into the skin 91 of the living body, the extension 76 serves as an oxygen introduction port for the protrusion 71 , so that heat generation of the exothermic material 30 in the protrusion 71 is more sustained and stable. becomes possible.
However, in the present invention, the projecting portion 71 and the extending portion 76 may be formed independently of each other, for example.

More specifically, as shown in FIGS. 1 and 2, the arrangement of the plurality of protrusions 71 is not particularly limited. , a hexagonal lattice, a rectangular lattice, or a staggered lattice.
In the case of this embodiment, for example, as shown in FIG. 2, the sheet 10 has five projections 71 arranged in a square grid pattern in plan view. More specifically, one projection 71a is arranged in the central portion of the seat 10, and the remaining four projections 71b are arranged around the projection 71a. These four protrusions 71b are arranged at the four corners of the sheet 10, respectively.
The sheet 10 has four extending portions 76 arranged in a substantially cross shape (substantially cross shape) in plan view. More specifically, each extending portion 76 linearly extends from the protrusion 71a arranged in the central portion of the seat 10 toward each protrusion 71b around the protrusion 71a. One end in the extending direction of each extending portion 76 is connected to the lower portion 72 of the protrusion 71a, and the other end in the extending direction of each extending portion 76 is connected to the lower portion of each of the protrusions 71b. 72. In this way, each extension 76 mutually connects the internal space 75 of the projection 71a arranged in the center and the internal space 79 of the projections 71b arranged around the projection 71a. I am communicating.
The upper edge of each extending portion 76 extends parallel to the one surface 10a.
The height position of the lower edge of each extension portion 76 is set to the same height position as the height position of the lower edge of each projection portion 71 .

Here, in the case of the present embodiment, it is preferable that the air permeability of the lower portion 72 of the protrusion 71 is lower than the air permeability of the upper portion 73 of the protrusion 71 . Here, air permeability is a value measured according to JIS P8117, and is defined as the time required for a certain amount of air to pass through a certain area under a certain pressure. Therefore, the lower the air permeability, the better the air permeability (the easier air flow).
By doing so, the heat generating material 30 in the lower portion 72 is cured before the heat generating material 30 in the upper portion 73 during use of the steam heating device 100, so that the portion that mainly touches the skin 91 is cured. Curing of the upper portion 73 of the protrusion 71 and excessive temperature rise can be suppressed.
Here, the lower portion 72 of the projection 71 means the lower portion of the side surface of the projection portion 71, and the upper portion 73 of the projection portion 71 means the upper portion of the side surface of the projection portion 71. . Similarly, in the following description, the lower portion 77 of the extension portion 76 means the lower portion on the side surface of the extension portion 76, and the upper portion 78 of the extension portion 76 means the side surface of the extension portion 76. means the upper part of
More specifically, in the case of the present embodiment, with the upper edge of the extending portion 76 as a reference, the lower portion 72 of the projecting portion 71 is the portion on the other surface 10b side, and the upper portion 73 of the projecting portion 71 is This is the portion on the one surface 10a side.
Further, as an example, the lower part of the extension part 76 that is bisected in the height direction of the extension part 76 is the lower part 77 of the extension part 76, and the upper part is the upper part of the extension part 76. 78.

Further, in the case of the present embodiment, it is preferable that the air permeability of the lower portion 72 of the projecting portion 71 is lower than the air permeability of the lower portion 77 of the extending portion 76 .
With such a configuration, the amount of oxygen supplied from the lower portion 72 to the upper portion 73 of the projection portion 71 can be moderately suppressed, so that the upper portion 73 of the projection portion 71 can more reliably be hardened or excessively heated. The exothermic reaction of the exothermic material 30 can be slowed down before the occurrence of . That is, during use of the steam heating device 100, hardening and excessive temperature rise of the upper portion 73 of the protrusion 71, which is the portion that mainly touches the skin 91, can be suppressed.

Further, in the case of the present embodiment, it is preferable that the air permeability of the lower portion 77 of the extension portion 76 is lower than the air permeability of the upper portion 73 of the projection portion 71 .
According to such a configuration, the heat generating material 30 in the lower portion 77 of the extending portion 76 hardens before the heat generating material 30 in the upper portion 73 of the projecting portion 71 . Oxygen supply into the upper portion 73 is attenuated or terminated. Therefore, the exothermic reaction of the exothermic material 30 can be more reliably slowed down before the upper portion 73 of the protrusion 71 hardens or the temperature rises excessively. That is, during use of the steam heating device 100, hardening and excessive temperature rise of the upper portion 73 of the protrusion 71, which is the portion that mainly touches the skin 91, can be suppressed.
Further, in the case of the present embodiment, it is preferable that the air permeability of the upper portion 78 of the extension portion 76 is lower than the air permeability of the upper portion 73 of the projection portion 71 .
With such a configuration, the exothermic reaction of the heat generating material 30 can be more reliably slowed down before the upper portion 73 of the protrusion 71 hardens or the temperature rises excessively.

More specifically, for example, the air permeability of the upper portion 78 of the extending portion 76 and the upper portion 73 of the projecting portion 71 is higher than the air permeability of each of the lower portion 72 of the projecting portion 71 and the lower portion 77 of the extending portion 76. The steam heating device 100 is configured as follows. Preferably, in the projecting portion 71 and the extending portion 76, the lower portion 72 of the projecting portion 71 has the lowest air permeability, and the upper portion 73 of the projecting portion 71 has the highest air permeability.
By doing so, it is possible to suppress hardening and excessive temperature rise of each of the upper portion 73 of the protrusion 71 and the upper portion 78 of the extending portion 76, which are the portions that mainly contact the skin 91, and to suppress the temperature rise through the extending portion 76. Oxygen supply to the heat generating material 30 in the protrusion 71 can be maintained, and stable heat generation is possible.
In addition, in the present invention, the air permeability of the extending portion 76 may be set substantially equal to the air permeability of the lower portion 72 of the protrusion 71, for example.

Furthermore, in the case of the present embodiment, the ratio of the height of the extension portion 76 to the height of the projection portion 71 is preferably 0.05 or more and 1.0 or less.
According to such a configuration, while the skin 91 of the living body is sufficiently pressed mainly by the upper portion 73 of the projection 71, the extending portion 76 allows the projection 71 to bite into the skin 91 of the living body in an appropriate range. can.
In addition, since a suitable amount of oxygen can be introduced into the exothermic material 30, the time necessary for the exothermic material 30 to sufficiently generate heat, the duration of heat generation, the heat generation temperature, the curing speed, and the like can be controlled. It can be any range of values desired.
More specifically, for example, the ratio of the height of the extension portion 76 to the height of the projection portion 71 is more preferably 0.1 or more and 0.8 or less, and still more preferably 0.2 or more and 0.6. or less, and more preferably 0.3 or more and 0.4 or less.

Further, in the case of the present embodiment, the ratio of the surface area of the extension portion 76 to the total surface area of the projection portion 71 and the extension portion 76 is preferably 0.05 or more and 0.7 or less.
With such a configuration as well, a suitable amount of oxygen can be introduced into the exothermic material 30. Therefore, the time necessary for the exothermic material 30 to sufficiently generate heat, the heat generation duration, the heat generation temperature, the curing speed, etc. can be in the desired range of values.
More specifically, for example, the ratio of the surface area of the extension portion 76 to the total surface area of the projection portion 71 and the extension portion 76 is more preferably 0.10 or more and 0.6 or less, and still more preferably 0.15. It is more than or equal to 0.4 or less, and more preferably 0.2 or more and 0.3 or less.

When the steam heating device 100 is worn on the shoulder of the human body, the total surface area of the protrusion 71 and the extension 76 is preferably 50 mm ² or more and 8000 mm ² or less, and is 200 mm ² or more and 4000 mm ² or less. more preferably 400 mm ² or more and 1600 mm ² or less. Similarly, the surface area of the extending portion 76 is, for example, preferably 5 mm ² or more and 2500 mm ² or less, more preferably 30 mm ² or more and 1500 mm ² or less, and even more preferably 100 mm ² or more and 600 mm ^{2 or} less. .
When the steam heating device 100 is attached to the waist of the human body, the total surface area of the projections 71 and the extensions 76 is preferably 100 mm ² or more and 10000 mm ² or less, and is 300 mm ² or more and 5000 mm ² or less. more preferably 500 mm ² or more and 2500 mm ² or less. Similarly, the surface area of the extending portion 76 is, for example, preferably 5 mm ² or more and 5000 mm ² or less, more preferably 30 mm ² or more and 2500 mm ² or less, and even more preferably 100 mm ² or more and 1200 mm ² or less. .

The heat generating performance of the exothermic material 30 is preferably set, for example, so that the surface temperature of the skin is set to 37° C. or higher and 44° C. or lower, and preferably set to 38° C. or higher and 42° C. or lower. More preferred.

An example of preferable dimensions of each of the protrusions 71 and the extensions 76 when the steam heating device 100 is worn on the shoulder of the human body is as follows.
The height dimension H1 (FIG. 3A) of the protrusion 71 is not particularly limited, but is preferably, for example, 2 mm or more and 15 mm or less, more preferably 3 mm or more and 10 mm or less, and 5 mm or more and 8 mm or less. It is even more preferable to have
Although the diameter of the protrusion 71 is not particularly limited, it is preferably 2 mm or more and 38 mm or less, more preferably 5 mm or more and 20 mm or less, and even more preferably 7 mm or more and 12 mm or less.
Similarly, the height dimension H2 (FIG. 3(c)) of the extending portion 76 is not particularly limited, but is preferably 0.5 mm or more and 7.5 mm or less, and preferably 1 mm or more and 5 mm or less. More preferably, it is 2 mm or more and 3 mm or less.
The length dimension L1 (FIG. 2) of the extension portion 76 is preferably 2 times or less the height dimension H1 of the protrusion 71, and more preferably 1.5 times or less the height dimension H1. . By doing so, the protrusions 71 can bite into the skin 91 of the living body while stimulating the pressure points appropriately without feeling heat or pain of the protrusions 71 against the skin 91 of the living body. Furthermore, the flow of oxygen into the heat-generating material 30 is not hindered, so that the heat-generating material 30 can generate heat satisfactorily.
The width dimension W1 (FIG. 2) of the extending portion 76 is not particularly limited, but is preferably equal to or less than the diameter of the protrusion 71, and more preferably equal to or less than 3/4 of the diameter. By doing so, a suitable amount of oxygen can be supplied to the protruding portion 71 via the extending portion 76 .

An example of preferable dimensions of each of the projecting portion 71 and the extending portion 76 when the steam heating device 100 is attached to the waist of the human body is as follows.
The height dimension H1 (FIG. 3(a)) of the protrusion 71 is not particularly limited, but is preferably, for example, 3 mm or more and 15 mm or less, more preferably 4 mm or more and 12 mm or less, and 6 mm or more and 9 mm or less. It is even more preferable to have
Although the diameter of the protrusion 71 is not particularly limited, it is preferably 3 mm or more and 38 mm or less, more preferably 5 mm or more and 20 mm or less, and even more preferably 8 mm or more and 15 mm or less.
Similarly, the height dimension H2 (FIG. 3(c)) of the extending portion 76 is not particularly limited, but is preferably 0.4 mm or more and 9 mm or less, and more preferably 1 mm or more and 6 mm or less. , more preferably 2 mm or more and 3.5 mm or less.
The length dimension L1 (FIG. 2) of the extension portion 76 is not particularly limited, but for example, it is preferably 3.0 times or less and 2.0 times or less the height dimension H1 of the projection portion 71. is more preferable, and 1.5 times or less is even more preferable. With such a range, the protrusion 71 can bite into the skin 91 while stimulating the pressure point appropriately without feeling the heat or pain of the protrusion 71 against the skin of the living body. Furthermore, the flow of oxygen into the heat-generating material 30 is not hindered, so that the heat-generating material 30 can generate heat satisfactorily.
The width dimension W1 (FIG. 2) of the extending portion 76 is not particularly limited, but is preferably equal to or less than the diameter of the protrusion 71, and more preferably equal to or less than 3/4 of the diameter. By doing so, a suitable amount of oxygen can be supplied to the protruding portion 71 via the extending portion 76 .

In addition, as described above, it is preferable that each of the top portion of the projection portion 71 and the top portion of the extension portion 76 has a rounded shape. Furthermore, it is preferable that the curvature of the top of the protrusion 71 is smaller than the curvature of the top of the extension 76 .
For example, the radius of curvature of the top of the protrusion 71 is preferably 0.5 mm or more and 3.0 mm or less, and more preferably 0.8 mm or more and 1.5 mm or less.
For example, the radius of curvature of the top of the protrusion 71 is preferably 0.5 mm or more and 2.5 mm or less, and more preferably 0.8 mm or more and 1 mm or less.
By doing so, the projection 71 can sufficiently and moderately press the skin 91 of the living body.
The top portion of the projection 71 here means the upper end portion of the upper portion 73 of the projection portion 71, and the top portion of the extension portion 76 means the upper end portion of the upper portion 78 of the extension portion 76. ing.

Here, the present invention may include, for example, a steam heater kit including a mounting portion 114 for attaching the steam heater 100 to the living body with the protrusion 71 pressed against the skin 91 .
According to such a configuration, the steam heating device 100 can be attached to the living body, and the attachment portion 114 can continuously press the protrusion 71 against the skin 91 .
In this case, in the steam heating device 100, the portion including the sheet 10 and the second sheet 20 is the main body.

More specifically, when using the steam heating device 100, as shown in FIG. It is pressed against skin 91 .
In this state, mainly the upper portion 73 of the protrusion 71 bites into the skin 91 while the lower portion 72 of the protrusion 71 is exposed from the skin 91 . Further, the top portion of the extension portion 76 abuts against the skin 91 to prevent the projection portion 71 from further biting into the skin 91 . However, the extending portion 76 may be separated from the skin 91, for example.

In the present invention, the method of attaching the steam heating device 100 to the mounting portion 114 is not particularly limited. Alternatively, the steam heating tool 100 may be sandwiched between the attachment section 114 and the skin 91 by the elastic restoring force of the attachment section 114 .
Further, for example, an adhesive layer (not shown) is formed on the rear surface side of the steam heating device 100, and the steam heating device 100 is attached to the mounting portion 114 by attaching the adhesive layer to the inner surface of the mounting portion 114. may be

Although the attachment part 114 is not particularly limited, for example, a supporter attached to the shoulders, arms and legs, and a corset attached to the waist can be used.

Here, in the case of the present embodiment, the strength with which the attachment part 114 presses the steam heating device 100 against the skin 91 is 50 kPa or more and 2000 kPa or less.
By pressing the steam heating device 100 against the skin 91 with such strength, for example, the fascia of the shoulder and waist of the human body can be sufficiently pressed. Furthermore, as described above, according to the steam heating device 100 of the present embodiment, the extension 76 allows the projections 71 to bite into the skin 91 in an appropriate range. It is possible to stably generate heat from the steam heating tool 100 while sufficiently and moderately pressing the skin 91 of the body.
The magnitude of the pressure here is a value measured using a pressure measurement film Prescale Ultra-Low Pressure LLW (manufactured by Fuji Film Co., Ltd.).

Also, the mounting part 114 may have, for example, a mounting surface to be mounted on the living body, and the steam heating device 100 may be provided on the mounting surface so that the protrusion 71 protrudes toward the living body.
In this case, when the mounting portion 114 is mounted on the living body, the mounting surface of the mounting portion 114 applies a pressing force of 1 kPa or more and 10 kPa or less to the living body.
That is, the present invention includes a steam heating device 100, and a mounting portion 114 having a mounting surface to be mounted on a living body and applying a pressing force of 1 kPa to 10 kPa to the living body by the mounting surface being mounted on the living body. , wherein the steam heating tool is provided on the mounting surface so that the protrusion 71 is convex toward the living body.
With such a configuration as well, it is possible to stably generate heat from the steam heating tool 100 while sufficiently and moderately pressing the skin 91 of the living body with the protrusions 71 . The magnitude of the pressure here is a value measured using a contact pressure measuring device AMI3037-10 (manufactured by AMI Techno Co., Ltd.) using an air pack type sensor.

In addition, in the present invention, the attachment portion 114 of the steam heating device 100 is a pair of attachment band portions, and may include, for example, an adhesive sheet portion that is adhesively fixed to the skin 91 . In this case, by adhesively fixing the adhesive sheet portion to the skin 91 while the attachment portion is under tension, the projection portion 71 is brought into pressure contact with the skin 91 so that the steam heating device 100 can be attached to the living body. can.
Further, in the present invention, for example, the steam heating device 100 may be wrapped around a leg or an arm using a belt-like body such as a bandage so that the protrusion 71 is pressed against the skin 91 .
In addition, in the present invention, the wearing part 114 may be in the form of an eye mask having a pair of ear hook parts to be hung on the ears of the user.
In addition, in the present invention, the steam heating device 100 may be used in combination with a mounting device (not shown) provided separately from the steam heating device 100 .

Moreover, the projections 71 and the extensions 76 filled with the heat generating material 30 are substantially plastic even when a pressure of 1 kPa is applied to the sheet 10 having the projections 71 and the extensions 76 in the direction perpendicular to the plane. It is preferable not to deform, and it is preferable not to deform even at 5 kPa or more.
By doing so, the protrusion 71 can sufficiently press the skin 91 of the living body, and the extent of the protrusion 71 biting into the skin 91 of the living body can be controlled to an appropriate range by the extension 76. can be done.
Although the numbers of projections 71 and extensions 76 that sheet 10 has are not particularly limited, two or more projections 71 are required to form extensions 76 .

Examples of materials and properties of each part of the steam heating device 100 will be described in more detail below.

As the oxidizable metal in the heat generating material 30, an oxidizable metal commonly used as a material for this type of heat generating material can be used. As the oxidizable metal, it is preferable to use powder or fibrous form from the viewpoint of handleability, moldability, and the like.

Examples of oxidizable metals in the form of powder include iron powder, aluminum powder, zinc powder, manganese powder, magnesium powder, calcium powder, etc. Among them, iron powder is preferred in terms of handling and manufacturing cost. Powder is preferably used.
As the oxidizable metal in the form of powder, the particle size (hereinafter referred to as the particle size means the maximum length in the form of powder, dynamic light scattering method, laser diffraction method, or etc.) is preferably 0.1 μm or more and 300 μm or less, and it is preferable to use one containing 50% by mass or more of particles having a particle size of 0.1 μm or more and 150 μm or less. more preferred.

Examples of fibrous oxidizable metals include steel fibers, aluminum fibers, and magnesium fibers. Among these, steel fibers, aluminum fibers, and the like are preferably used from the viewpoint of handleability and manufacturing cost. The oxidizable metal having a fibrous form preferably has a fiber length of 0.1 mm or more and 50 mm or less and a thickness of 1 μm or more and 1000 μm or less from the viewpoint of heat generation performance.

The content of the oxidizable metal in the heat generating material 30 is preferably 30% by mass or more and 80% by mass or less, and more preferably 40% by mass or more and 70% by mass or less.
By setting the content to 30% by mass or more, the heat generation temperature of the protrusions 71 filled with the heat generating material 30 can be sufficiently increased to the extent that a person feels hot when touched with a fingertip or the like, which is preferable.
By setting this content to 80% by mass or less, the exothermic material 30 has sufficient air permeability. can be raised. In addition, the heat generation time of the heat generating material 30 can be made sufficiently long, and the moisture supply by the water retention agent can be made sufficient.
Here, the content of the oxidizable metal in the heat generating material 30 is measured by an ash content test according to JIS P8128, or when the oxidizable metal is iron, it is determined using the property that magnetization occurs when an external magnetic field is applied. It can be measured by a vibrating sample type magnetization measurement test or the like.

The carbon material in the heat generating material 30 has the function of a reaction accelerator to promote the oxidation reaction, specifically, it functions as one or more of the oxygen holding and supplying material for the oxidizable metal and the catalytic activity. can be used. The carbon material also functions as a water retention agent, which will be described below.
Examples of such carbon materials include activated carbon such as coconut shell charcoal, charcoal powder, almanac coal, peat and lignite, carbon black, acetylene black, and graphite powder. These can be used alone or in combination of two or more. Among these, activated carbon powder is preferably used as the carbon material powder because it has a good balance of oxygen supply ability and catalytic ability.

As the water-retaining agent in the heat-generating material 30, a water-retaining agent commonly used as a material for this type of heat-generating material can be used. This water retention agent acts as a water retention agent. The water retention agent may also function as a supply agent that retains oxygen to be supplied to the oxidizable metal and supplies the oxygen to the oxidizable metal.
For example, an inorganic material is preferably used as the water retention agent.
For example, a water-absorbing polymer 40 or a porous material is preferably used as the water retention agent.
In this embodiment, it is preferable to contain the water absorbing polymer 40 .

Examples of water retention agents other than the water-absorbing polymer 40 include activated carbon (coconut shell coal, charcoal powder, almanac coal, peat, lignite), carbon black, acetylene black, graphite, zeolite, perlite, vermiculite, silica, cancrinite, fluorite and the like.
The form of this water retention agent is not particularly limited, but it is preferable to use a powdery one with a particle size of 0.1 μm or more and 500 μm or less from the viewpoint of forming an effective contact state with the oxidizable metal. It is more preferable to contain 50% by mass or more of a powder having a size of 0.1 μm or more and 200 μm or less.

The total content of the activated carbon and the water retention agent (excluding the water-absorbent polymer 40) in the exothermic material 30 is preferably 1% by mass or more and 50% by mass or less, and more preferably 2% by mass or more and 40% by mass or less. more preferred.
By setting the content to 1% by mass or more, the heat generating material 30 can sufficiently accumulate moisture necessary for sustaining the oxidation reaction of the oxidizable metal to the extent that the temperature rises above the human body temperature. In addition, since the heat-generating material 30 has sufficient air permeability, the heat-generating material 30 can be sufficiently supplied with oxygen, and the heat-generating efficiency of the heat-generating material 30 can be improved.
By setting this content to 50% by mass or less, the heat capacity of the heat generating material 30 can be suppressed with respect to the amount of heat generated, so that the heat generation temperature rise becomes large, and a temperature rise that a person can feel warm is obtained.

Examples of the water absorbing polymer 40 in the heat generating material 30 include starch, crosslinked carboxymethylated cellulose, polymers or copolymers of acrylic acid or alkali metal acrylate salts, polyacrylic acid and its salts, and polyacrylic acid salts. One or more graft polymers may be included. A sodium salt can be used as a polyacrylic acid salt. Among them, a partially cross-linked sodium salt polymer of acrylic acid is preferable from the viewpoint of achieving both continuous generation of water vapor and moderate progress of the oxidation reaction, as well as preventing unintended drop-off of constituent materials to further improve production efficiency. .
Further, the shape of the water-absorbing polymer 40 may be spherical, lumpy, grape-like, fibrous, or a combination thereof.
The particle size of the water-absorbent polymer 40 is preferably 1 μm or more, more preferably 10 μm or more. The particle size of the water-absorbing polymer 40 is preferably 1000 μm or less, more preferably 500 μm or less. The particle size of the water-absorbing polymer particles is measured by dynamic light scattering method, laser diffraction method, or the like.

The content of the water absorbing polymer 40 in the heat generating material 30 is preferably 0.05% by mass or more and 12% by mass or less, and more preferably 0.1% by mass or more and 8% by mass or less. By setting the content of the water-absorbing polymer 40 in the exothermic material 30 to 0.05% by mass or more, the water-absorbing polymer 40 can sufficiently absorb water. Further, by setting the content of the water absorbing polymer 40 in the heat generating material 30 to 12% by mass or less, it is possible to sufficiently ensure the content of the oxidizable metal in the heat generating material 30 that contributes to heat generation.
Moreover, the water-absorbing polymer 40 is mainly arranged in the internal space 75 of the lower part 72 of the projection part 71 in the projection part 71, for example. Similarly, the water-absorbing polymer 40 is located, for example, in the extension 76 primarily in the interior space 79 of the lower portion 77 of the extension 76 .

As described above, the heat generating material 30 preferably contains an electrolyte, for example.
As this electrolyte, an electrolyte commonly used as a material for this type of heat generating material can be used.
Examples of the electrolyte include chlorides or hydroxides of alkali metals, alkaline earth metals or heavy metals. Among these, various chlorides such as sodium chloride, potassium chloride, calcium chloride, magnesium chloride and iron chloride (primary and secondary) are preferably used from the viewpoint of excellent electrical conductivity, chemical stability and production cost. These electrolytes can also be used individually or in combination of 2 or more types.
The content of the electrolyte in the exothermic material 30 is preferably 0.5% by mass or more and 24% by mass or less, more preferably 1% by mass or more and 10% by mass or less, relative to the water in the exothermic material 30. preferable.
By setting this content to 0.5% by mass or more, the oxidation reaction of the heat generating material 30 can be sufficiently progressed. As a result, it is possible to sufficiently ensure the heat generation temperature rise.
By making this content 24% by mass or less, the air permeability of the heat generating material 30 can be improved. , sufficient water is supplied to the oxidizable metal and the like, the heat generation performance is excellent, and the electrolyte can be uniformly blended in the heat generating material 30, which is preferable.

Further, the exothermic material 30 may contain a thickening agent, a flocculating agent, and other additives.
In order to uniformly fill the internal space 75 of the fine protrusion 71 and the internal space 79 of the extension 76 with the heat generating material 30, the heat generating material 30 is filled in the internal spaces 75 and 79 in the form of slurry having fluidity. In this case, the exothermic material 30 preferably contains a thickening agent. As a thickening agent, mainly substances that absorb water to increase consistency or impart thixotropic properties, such as water-soluble polymeric materials, can be used.
Further, as described above, in the case of the present embodiment, the internal spaces 75 of the plurality of projecting portions 71 connected via the extension portions 76 and the internal spaces 79 of the extension portions 76 communicate with each other. . Therefore, in the manufacturing process of the steam heating device 100, by filling the exothermic material 30 at one point (with one nozzle), the exothermic material 30 spreads over the entire area by its own weight and fills the internal spaces 75 and 79 at once. be able to. That is, the manufacturing efficiency of the steam heating device 100 can be improved.

The heat generation temperature of the protrusion 71 of the steam heating device 100 is preferably 35° C. or higher and 98° C. or lower, and more preferably 38° C. or higher and 70° C. or lower.
The extension part 76 of the steam heating device 100 preferably has a heat generation temperature of 35° C. or higher and 98° C. or lower, and more preferably 38° C. or higher and 70° C. or lower.
Measurement of the heat generation reaching temperature of the steam heating device 100 can be performed by a method equivalent to JIS S4100.

In the sheet 10 in which the heat generating material 30 is filled in the projecting portions 71 and the extending portions 76, the amount of water vapor generated in 10 minutes per unit weight (1 g) of the heat generating material 30 is 20 mg/g or more and 250 mg/g or less. preferably 70 mg/g or more and 180 mg/g or less.
Here, the amount of water vapor (the amount of water vapor generated) is measured, for example, as follows.
The device used for the measurement consists of an aluminum measurement chamber (volume 4.2 L), an inflow path for inflowing dehumidified air (humidity less than 2%, flow rate 2.1 L / min) at the bottom of the measurement chamber, and the measurement chamber an outflow passage for discharging air from the upper portion. An inlet temperature/humidity meter and an inlet flow meter are attached to the inflow path. On the other hand, an outlet temperature/hygrometer and an outlet flow meter are attached to the outflow path. A thermometer (thermistor) is installed in the measurement chamber. A thermometer with a temperature resolution of about 0.1° C. is used.
At the measurement environment temperature of 30° C. (30±1° C.), the steam heating device 100 is taken out from the packaging material, placed in the measurement chamber with one surface 10a side of the sheet 10 facing up, and a metal ball (4.5 g in mass) is placed. Place the attached thermometer on it. In this state, dehumidified air is flowed from the lower part of the measurement chamber, and the difference in absolute humidity before and after the air flows into the measurement chamber is determined based on the temperature and humidity measured by the inlet thermohygrometer and the outlet thermohygrometer. Furthermore, based on the flow rates measured by the inlet flow meter and the outlet flow meter, the amount of steam emitted by the steam heating tool 100 is calculated. The amount of water vapor generated is measured for 10 minutes after the start of measurement.

The nonwoven fabric sheet 15 includes fibers made of the first resin material and binding portions made of the second resin material that bind the fibers together. Similarly to the nonwoven fabric sheet 15, the nonwoven fabric sheet 17 also includes fibers made of the first resin material and binding portions made of the second resin material that bind the fibers together. consists of
That is, each of the first nonwoven fabric sheet and the second nonwoven fabric sheet includes fibers made of the first resin material and binding portions made of the second resin material that bind the fibers together. , is composed of
However, the first resin material forming the nonwoven fabric sheet 15 and the first resin material forming the nonwoven fabric sheet 17 may be the same material or may be different materials.
The second resin material forming the nonwoven fabric sheet 15 and the second resin material forming the nonwoven fabric sheet 17 may be the same material or may be different materials.
In this embodiment, for example, the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 are made of the same material, and the first resin material that makes up the nonwoven fabric sheet 15 and the first resin material that makes up the nonwoven fabric sheet 17 are The second resin material forming the nonwoven fabric sheet 15 and the second resin material forming the nonwoven fabric sheet 17 are the same material as each other.

Materials for the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 include synthetic fibers, natural fibers, and composite fibers thereof, and the manufacturing methods include spunbonding, needlepunching, spunlacing, meltblowing, flash spinning, and airlaid. , an air-through method, and the like.

The first resin material constituting the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 is not particularly limited, but may be, for example, polyethylene, polypropylene, nylon, rayon, polystyrene, acrylic, vinylon, cellulose, aramid, polyvinyl alcohol, polyethylene naphthalate, or polyethylene terephthalate. Among them, polyethylene terephthalate (PET) is preferred.
The second resin material that forms the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 is not particularly limited, but preferably has a lower melting point than the first resin material that forms the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 . The second resin material constituting the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 is, for example, polyethylene, polypropylene, ethylene vinyl acetate resin, or low melting point PET (polyester copolymer). PET with a melting point is preferred.
The fibers forming the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 may have a core-sheath structure including a core made of the first resin material and a sheath made of the second resin material.
Each of the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 is made of at least one resin material having a melting point lower than that of the first resin material and higher than that of the second resin material. It further includes a second binding portion that binds fibers of a resin material with a high melting point (a group of resins (including at least the first resin material) that does not melt during processing of the nonwoven fabric for forming the projections 71). good too.

The content of the first resin material in nonwoven fabric sheet 15 and nonwoven fabric sheet 17 is greater than the content of the second resin material in nonwoven fabric sheet 15 and nonwoven fabric sheet 17 .
Preferably, the content of the first resin material in nonwoven fabric sheet 15 and nonwoven fabric sheet 17 is 60% by mass or more and 95% by mass or less. Moreover, the content of the second resin material in the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 is 5% by mass or more and 40% by mass or less.
By setting the contents of the first resin material and the second resin material in the non-woven fabric sheet 15 and the non-woven fabric sheet 17 in this way, the non-woven fabric sheet 15 and the non-woven fabric sheet 15 are sufficiently air-permeable while ensuring sufficient breathability. and the rigidity of each of the nonwoven fabric sheet 17 can be sufficiently ensured.

The basis weight of each of the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 is preferably 15 g/m ² or more and 500 g/m ² or less, more preferably 30 g/m ² or more and 350 g/m ^{2 or} less. By setting the basis weight of each of the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 to be 15 g/m ² or more, the sheet 10 can have sufficient strength, and the temperature of the heat generating material 30 can be moderately moderated and transmitted to the skin 91 . can be done. When the basis weight of each of the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 is 500 g/m ² or less, the temperature of the heat generating material 30 can be efficiently transmitted to the skin 91 through the sheet 10 .
However, the basis weight of each of the nonwoven fabric sheet 15 and the nonwoven fabric sheet 17 can be appropriately set.

^The air permeability of the ventilation sheet 16 ^is not particularly limited ^. · 24 h) or more and 8000 g/(m ² ·24 h) or less. By setting the moisture permeability of the permeable sheet 16 within such a range, oxygen is quickly supplied to the exothermic material 30 through the sheet 10 when the steam heating device 100 is taken out of the packaging material, and heat is transferred from the exothermic material 30. Steam can be generated quickly, and the duration of heat generation can be sufficiently long. The moisture permeability of the permeable sheet 16 can be measured, for example, by the JIS (Z0208) CaCl ₂ method, and the measurement conditions can be 40° C. and 90% RH.
The ventilation sheet 16 may have breathability over its entire surface, or may have breathability partially.
The permeable sheet 16 preferably has a basis weight of 10 g/m ² or more and 200 g/m ² or less, particularly 20 g/m ² or more and 100 g/m ^{2 or} less. By setting the basis weight of the ventilation sheet 16 within such a range, it is possible to quickly generate heat and steam when the steam heating device 100 is taken out of the packaging material, and to sufficiently lengthen the duration of heat generation. be able to.

As the ventilation sheet 16, a sheet made of polyolefin such as polyethylene or polypropylene, or resin such as polyester, polyamide, polyurethane, polystyrene, polyethylene-vinyl acetate copolymer, or the like is mechanically formed with ventilation holes. A mixed sheet with inorganic filler is stretched to form interfacial exfoliation to form fine air holes, or interfacial exfoliation of the crystal structure is used to form micro air holes, or continuous cells are formed by foam molding. Examples include those in which fine air holes are communicated.
More specifically, as the air-permeable sheet 16, a mixed sheet of polypropylene and calcium carbonate formed with fine air holes by exfoliating the mixed sheet by stretching can be preferably used.

The average value of the moisture permeability of the sheet 10 is, for example, preferably 1000 g/(m ² ·24 h) or more and 17000 g/(m ² ·24 h) or less, and 2000 g/(m ² ·24 h) or more and 12000 g/(m ² - 24h) or less is more preferable.

In this embodiment, the average moisture permeability of the second sheet 20 is lower than the average moisture permeability of the sheet 10 .
The moisture permeability of the second sheet 20 is, for example, 2000 g/(m ² ·24 h) or less, preferably 1000 g/(m ² ·24 h) or less.
By setting the moisture permeability of the second sheet 20 within such a range, the second sheet 20 can regulate the direction in which water vapor is generated as the heat generating material 30 generates heat. For example, oxygen is supplied to the heating material 30 from the sheet 10 side, the generation of water vapor from the second sheet 20 can be suppressed, and water vapor can be generated mainly from the sheet 10 side.

The second sheet 20 preferably has a basis weight of 10 g/m ² or more and 200 g/m ² or less, and 20 g/m ² or more and 100 g/m ² or less. By setting the basis weight of the second sheet 20 within such a range, the second sheet 20 can regulate the direction in which water vapor is generated due to heat generation.

Examples of the second sheet 20 include a sheet containing a resin film made of a resin such as polyolefin such as polyethylene and polypropylene, polyester, polyamide, polyurethane, polystyrene, nylon, polyvinylidene chloride, and polyethylene-vinyl acetate copolymer. In particular, by using a sheet in which an inorganic filler such as titanium oxide is blended into the above resin, the second sheet 20 can effectively conceal the heat generating material 30 . The second sheet 20 can also be used by stacking a plurality of sheets.
More specifically, examples of the second sheet 20 include a laminated sheet of paper and the resin film, and a laminated sheet of nonwoven fabric and the resin film. In this case, the resin film is on the inner surface side (sheet 10 side) of the second sheet 20 , and the paper or non-woven fabric constituting the second sheet 20 is arranged on the outer surface side (rear surface side) of the second sheet 20 . Furthermore, a non-woven fabric may be laminated on the rear surface side of the second sheet 20 in order to suppress heat radiation to the rear surface side.

<Modifications 1 to 3>
Next, modified examples 1 to 3 of the embodiment will be described with reference to FIGS. 7(a), 7(b) and 7(c). 7A, 7B, and 7C, illustration of the base portion 11 is omitted.
The steam heating device 100 according to the present modification is different from the steam heating device 100 according to the above embodiment in the points described below, and is different from the steam heating device 100 according to the above embodiment in other respects. configured similarly.

As shown in FIGS. 7(a), 7(b) and 7(c), in the present invention, the ratio of the height of the extension portion 76 to the height of the projection portion 71 is determined according to the desired steam heating device 100. can be appropriately set according to the pressing performance and heat generation performance of the steam heating tool 100, and the like.

For example, as in Modification 1 shown in FIG. 7A, the ratio of the height of the extension 76 to the height of the projection 71 may be 0.08.
In this case, since projection 71 bites into skin 91 more deeply, the strength of pressure of projection 71 against skin 91 can be increased.
Also, as shown in FIG. 3A, the ratio of the width dimension of the extension portion 76 to the diameter of the projection portion 71 may be set smaller than in the above embodiment. In this case, the amount of oxygen supplied to the protrusion 71 via the extension 76 can be suppressed.

Further, for example, as in Modified Example 2 shown in FIG. 7B, the ratio of the height of the extension portion 76 to the height of the projection portion 71 may be set to 0.69.
In this case, since the protrusion 71 bites into the skin 91 more shallowly, the pressing strength of the protrusion 71 against the skin 91 can be weakened.
Further, as shown in FIG. 7B, the ratio of the width dimension of the extension portion 76 to the diameter of the projection portion 71 may be set larger than in the above embodiment. In this case, the amount of oxygen supplied to the projecting portion 71 via the extending portion 76 can be increased.

Further, for example, as in Modified Example 3 shown in FIG. 7C, the ratio of the height of the extension portion 76 to the height of the projection portion 71 may be set to 0.86.
In this case, projection 71 digs into skin 91 more shallowly than modification 2, so that the strength of pressure of projection 71 against skin 91 can be further weakened.
Further, as shown in FIG. 7(c), the ratio of the width dimension of the extension portion 76 to the diameter of the projection portion 71 may be set larger than that of the second modification. In this case, the amount of oxygen supplied to the projecting portion 71 via the extending portion 76 can be further increased.

The present invention is not limited to the above embodiments and modifications, and includes various modifications and improvements as long as the object of the invention is achieved.

For example, in the present invention, the sheet 10 may have a plurality of types of protrusions 71 with different shapes. In addition, in the case of this modification, the sheet 10 may have a plurality of types of protrusions 71 with different dimensions.
Similarly, in the present invention, the sheet 10 may have a plurality of types of extending portions 76 with different shapes, or may have a plurality of types of extending portions 76 with different dimensions.

10 Sheet 10a One side 10b The other side 11 Base 15 Nonwoven fabric sheet 16 Breathable sheet 17 Nonwoven fabric sheet 20 Second sheet 30 Heat generating material 40 Absorbent polymer 71 Projection 71a Internal space 72 Lower part 73 Upper part 75 Internal space 76 Extension 77 Lower part 78 Upper part 79 Internal space 91 Skin 100 Steam heating device 114 Applied part

Claims (5)

Two or more protrusions that are convexly curved on one surface side, and two or more protrusions that are convexly curved on the one surface side at a height lower than the protrusions and extend laterally from the side surfaces of the protrusions. an air-permeable sheet made of non-woven fabric, having a protruding extension;
a heat-generating material containing oxidizable metal powder and water and filled in the internal space of the protrusion and the internal space of the extension;
A steam heater having a The extensions connect the adjacent projections to each other, and the internal spaces of the plurality of projections connected via the extensions and the internal spaces of the extensions are connected to each other. 2. The steam heating device of claim 1, wherein the steam heating device is in communication. 3. The steam heating device according to claim 1, wherein the ratio of the height of the extension to the height of the protrusion is 0.05 or more and 1.0 or less. 4. The steam heating device according to any one of claims 1 to 3, wherein a ratio of the surface area of the extension portion to the total surface area of the projection portion and the extension portion is 0.05 or more and 0.7 or less. a steam heating device according to any one of claims 1 to 4;
a mounting part having a mounting surface to be mounted on a living body, wherein the mounting surface exerts a pressing force of 1 kPa or more and 10 kPa or less on the living body by being mounted on the living body;
A steam heater kit comprising:
A steam heating tool kit in which the protrusions are arranged so as to project toward the living body.

Images