阅读说明：本技术 温热器具 (Warming appliance ) 是由 齐田泰人 小田英志 于 2019-03-13 设计创作，主要内容包括：温热器具(100)是配置于覆盖使用者的口和鼻的口罩的内侧的温热器具(100),且具备在温热器具(100)的长边方向排列配置的一对水蒸汽产生体(50),一对水蒸汽产生体(50)被收容于外包装体(60),水蒸汽产生体(50)具备袋体(53),该袋体(53)由位于所述使用者侧的第1片材(51)、及位于与所述使用者侧为相反侧的第2片材(52)构成,第1片材(51)的透气度为10,000秒/100ml以下,第2片材(52)的透气度高于第1片材(51)的透气度,外包装体(60)具有狭缝(70)。(The heating device (100) is arranged inside a mask covering the mouth and nose of a user, and is provided with a pair of water vapor generators (50) arranged in a longitudinal direction of the heating device (100), wherein the pair of water vapor generators (50) are housed in an outer packaging body (60), the water vapor generators (50) are provided with a bag body (53), the bag body (53) is composed of a 1 st sheet (51) positioned on the user side and a 2 nd sheet (52) positioned on the opposite side of the user side, the air permeability of the 1 st sheet (51) is less than or equal to 10,000 seconds/100 ml, the air permeability of the 2 nd sheet (52) is higher than that of the 1 st sheet (51), and the outer packaging body (60) is provided with a slit (70).)

1. A warming appliance, wherein,

is a warmer arranged inside a mask covering the mouth and nose of a user,

the heating device comprises a pair of steam generators arranged in a longitudinal direction of the heating device, the pair of steam generators being housed in an outer package,

the steam generating body is provided with a bag body which is composed of a 1 st sheet positioned at the user side and a 2 nd sheet positioned at the opposite side of the user side,

The air permeability of the No. 1 sheet is 10,000 seconds/100 ml or less,

the 2 nd sheet has an air permeability higher than that of the 1 st sheet,

the outer package body has a convex portion forming a convex portion facing the inside of the mask.

2. A warming appliance, wherein,

is a warmer arranged inside a mask covering the mouth and nose of a user,

the heating device comprises a pair of steam generators arranged in a longitudinal direction of the heating device, the pair of steam generators being housed in an outer package,

the steam generating body is provided with a bag body which is composed of a 1 st sheet positioned at the user side and a 2 nd sheet positioned at the opposite side of the user side,

the air permeability of the No. 1 sheet is 8,000 seconds/100 ml or less,

the air permeability of the 1 st sheet is 35% or less of the air permeability of the 2 nd sheet,

the outer package body has a convex portion forming a convex portion facing the inside of the mask.

3. The warming appliance according to claim 1 or 2,

the convex portion forming portion is a gap extending from an end portion of the outer package body toward a central portion of the outer package body in a region separating the pair of steam generating bodies.

4. A warmer according to any one of claims 1 to 3, wherein,

the second sheet has an air permeability of 250 seconds/100 ml to 12,000 seconds/100 ml, and the first sheet has an air permeability of 20% or less with respect to the second sheet.

5. A warmer according to any one of claims 1 to 4, wherein,

the amount of water vapor generated by the entire warmer is 50mg/10min to 2400mg/10 min.

6. A warmer according to any one of claims 1 to 5, wherein,

the air permeability of the No. 1 sheet is 250 seconds/100 ml or more.

7. A warmer according to any one of claims 1 to 6, wherein,

the gap is provided in a longitudinal center portion of the outer package.

8. A warmer according to any one of claims 1 to 7, wherein,

the steam generator is provided with a steam generating part, and the steam generating part comprises an oxidizable metal, a water absorbing agent and water.

9. A warmer according to any one of claims 1 to 8, wherein,

the length of the gap is 0.5cm to 7 cm.

10. The warming appliance according to claim 1 or 2,

the convex portion forming portion has a substantially triangular folding line extending from an end portion of the outer package body toward a vertex of a central portion of the outer package body in a region separating the pair of steam generating bodies.

11. The warming appliance according to claim 1 or 2,

the convex portion forming portion is 3 linear folding lines extending from the lower end to the upper end of the outer package in a region sandwiched between the pair of steam generating bodies in the central portion of the outer package.

12. The warming appliance according to claim 1 or 2,

the convex portion forming portion includes 2 linear stretchable members extending from a lower end to an upper end of the outer package in a region sandwiched between the pair of steam generating bodies in a central portion of the outer package.

13. A warmer according to any one of claims 1 to 12, wherein,

the maximum absolute humidity in the mask during use of the warmer is 12g/m³Above 30g/m³The following.

14. A warmer according to any one of claims 1 to 13, wherein,

the average absolute humidity in the mask during use of the warmer was 11.7g/m³Above 35g/m³The following.

15. A method for using a warmer, wherein,

a mask worn in a state in which a heater according to any one of claims 1 to 14 is disposed inside the mask covering the mouth and nose of a user.

16. The method of using the warming appliance according to claim 15,

the convex portion forming portion forms a convex portion facing the inside of the mask on the exterior body.

17. The method of using the warming appliance according to claim 15 or 16,

the convex portion forming portion is a gap extending from an end portion of the outer package body toward a central portion of the outer package body in a region separating the pair of steam generating bodies,

the convex portion is formed on the outer package body by overlapping or bringing the regions with the gap therebetween into close proximity with each other so as to close the gap.

Technical Field

The present invention relates to a warmer.

Background

Masks are known to cover the mouth and nose of a user to shield dust, pollen, and the like in the outside air, thereby providing an effect of preventing allergic rhinitis, cold, and the like. In recent years, the functions of masks for covering the mouth and nose have been diversified, and various masks have been developed. Among them, there is a strong development of a mask which brings a feeling of warmth or steam to the mouth or nose by adding a warmer or a steam generator to the mask.

As to such a technique, patent document 1 discloses a warmer that can be attached to various types of masks. Specifically, the heating device described in patent document 1 includes a heating element that generates water vapor, and a container that contains the heating element, and the container is designed to expand by the water vapor generated by the heat generation of the heating element.

Further, it is shown that by adopting such a configuration, a heating appliance which is easily suitable for a user and which is less likely to cause discomfort can be provided.

Patent document 2 discloses a disposable nasal warmer in which a bag having air permeability and a shape such as to cover the nose and the area around the nose is filled with a heat generating substance containing iron powder, activated carbon, salts, water, and the like as a main component.

Disclosure of Invention

That is, the present invention is a warmer which is disposed inside a mask covering the mouth and nose of a user,

the heating device comprises a pair of steam generators arranged in a longitudinal direction of the heating device, the pair of steam generators being housed in an outer package,

the steam generating body is provided with a bag body which is composed of a 1 st sheet positioned at the user side and a 2 nd sheet positioned at the opposite side of the user side,

the air permeability of the No. 1 sheet is 10,000 seconds/100 ml or less,

the 2 nd sheet has an air permeability higher than that of the 1 st sheet,

The outer package body has a convex portion forming a convex portion facing the inside of the mask.

Further, the present invention is a warmer which is disposed inside a mask covering the mouth and nose of a user,

the heating device comprises a pair of steam generators arranged in a longitudinal direction of the heating device, the pair of steam generators being housed in an outer package,

the steam generating body is provided with a bag body which is composed of a 1 st sheet positioned at the user side and a 2 nd sheet positioned at the opposite side of the user side,

the air permeability of the No. 1 sheet is 8,000 seconds/100 ml or less,

the air permeability of the 1 st sheet is 35% or less of the air permeability of the 2 nd sheet,

the outer package body has a convex portion forming a convex portion facing the inside of the mask.

Drawings

The above and other objects, features and advantages will be more apparent from the following description of preferred embodiments and the accompanying drawings.

Fig. 1 is a plan view schematically showing an example of a heating appliance according to the present embodiment.

FIG. 2 is a sectional view of the steam generator according to the present embodiment.

FIG. 3 is a schematic view showing an apparatus for measuring the amount of water vapor generated.

Fig. 4 is a diagram showing a use example of the warmer according to the present embodiment.

Fig. 5 is a plan view schematically showing a modification of the heating appliance of the present embodiment.

Fig. 6 is a schematic view showing a modification of the warmer according to the present embodiment.

Fig. 7 is a schematic view showing a modification of the warmer according to the present embodiment.

Fig. 8 is a schematic view showing a modification of the warmer according to the present embodiment.

Fig. 9 is a schematic view showing a modification of the warmer according to the present embodiment.

Detailed Description

The heater disclosed in patent document 1 is designed so that the oxidation reaction in the heating element can be promoted by setting the air permeability of the outer sheet of the container to be low. Further, this allows the container to easily expand and the heating element to be in close contact with the skin, and therefore, a warming effect can be expected. However, since there is little space between the heat generating element and the skin in the mask, it is not sufficient to easily suck the outside air.

Further, the technique described in patent document 2 is characterized in that a gap between a heating element and a nose is eliminated and the nasal cavity is directly heated by providing an uneven portion on one surface of a substantially flat disposable warmer and bringing the uneven portion into contact with the user so as to follow the shape of the nose. Therefore, there is a case where a problem that the nose portion becomes overheated occurs.

The present invention has been made in view of the above-described background art, and provides a warmer that can provide a moderate temperature feeling when placed inside a mask, and that allows a user to easily inhale outside air.

As a result of studies to solve the above problems, the present inventors have found that a warmer which can obtain a moderate temperature feeling when it is arranged inside a mask and can allow a user to easily inhale outside air can be provided by forming a bag body constituting a water vapor generator with a sheet having a specific air permeability and further providing a convex portion forming portion facing the inside of the mask to an outer packaging body housing the water vapor generator.

According to the present invention, it is possible to provide a warmer which can provide a moderate temperature feeling when it is placed inside a mask and which allows a user to easily inhale outside air.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same components are denoted by the same reference numerals, and the description thereof is omitted as appropriate. In the present specification, "to" means from above to below unless otherwise specified. The configurations and elements described in the embodiments may be combined as appropriate without impairing the effects of the present invention.

In the present embodiment, the air permeability of the sheet or the like can be measured in the following manner.

Air permeability is a value measured by JIS P8117 (revised 2009) and is defined as the permeability of 100ml of air to 6.42cm under a fixed pressure²Time of area (d). Therefore, a higher value of the air permeability means that the air permeation takes time, i.e., the air permeability is lower. Conversely, a smaller value of air permeability means a higher air permeability. In this way, the magnitude of the air permeability value is inversely related to the air permeability. Air permeability can be measured using a joker air permeability meter.

In the present specification, the air permeability of 30000 seconds/100 ml or more is treated as "hard air permeability", and the air permeability of 80000 seconds/100 ml or more is treated as "air impermeability".

In the present embodiment, the basis weight is a mass per unit area when the thermal appliance 100 is viewed from above.

The heating device 100 according to the present embodiment is a heating device 100 disposed inside a mask covering the mouth and nose of a user, the heating device 100 includes a pair of water vapor generators 50 arranged in a longitudinal direction of the heating device 100, the pair of water vapor generators 50 are housed in an exterior body 60, the water vapor generators 50 include a bag body 53, the bag body 53 is composed of a 1 st sheet 51 positioned on the user side and a 2 nd sheet 52 positioned on the opposite side to the user side, the air permeability of the 1 st sheet 51 is 10,000 seconds/100 ml or less, the air permeability of the 2 nd sheet 52 is higher than that of the 1 st sheet 51, and the exterior body 60 has slits 70 forming projections facing the inside of the mask.

Fig. 1(a) is a schematic diagram showing an example of a warmer 100 according to the present embodiment.

As shown in fig. 1(a), the heating appliance 100 includes a pair of steam generators 50 arranged in a longitudinal direction thereof, and an outer package 60 housing the pair of steam generators 50.

Here, the steam generator 50 accommodates a steam generating unit 40 (see fig. 2) described below.

Further, in the outer package 60, in a region separating the pair of steam generators 50, a slit 70 extending from an end portion of the outer package 60 toward a central portion of the outer package 60 is provided.

As described later, the steam generator 50 includes a bag 53 formed of the 1 st sheet 51 and the 2 nd sheet 52, and the 1 st sheet 51 and the 2 nd sheet 52 are set so as to have a combination of specific air permeabilities.

Hereinafter, each configuration of the heater 100 according to the present embodiment will be described.

First, the steam generator 40 provided in the steam generator 50 of the heating appliance 100 will be described with reference to fig. 2.

The water vapor generating section 40 contains an oxidizable metal, a water absorbing agent, and water. The steam generator 40 may further include an electrolyte, a reaction accelerator, and the like as needed.

When such a water vapor generation unit 40 comes into contact with air, oxidation reaction of the oxidizable metal contained therein is caused, and heat is generated. The water contained in the water vapor generator 40 is heated to a predetermined temperature by the heat, and is released to the outside by the water vapor generator 50. Here, the water vapor is released to the outside from a portion of the water vapor generator 50 having high air permeability.

The oxidizable metal is a metal that generates heat of oxidation reaction, and examples thereof include 1 or 2 or more kinds of powder or fiber selected from iron, aluminum, zinc, manganese, magnesium, and calcium. Among them, iron powder is preferable in view of handling, safety, production cost, storage stability and stability. Examples of the iron powder include 1 or 2 or more kinds selected from reduced iron powder and atomized iron powder.

When the oxidizable metal is a powder, the average particle diameter is preferably 0.1 μm or more, more preferably 10 μm or more, and still more preferably 20 μm or more, from the viewpoint of efficiently performing the oxidation reaction. From the same viewpoint, it is preferably 300 μm or less, more preferably 200 μm or less, and still more preferably 150 μm or less.

Further, from the viewpoint of improving coatability, the average particle size is preferably 10 μm to 200 μm, and more preferably 20 μm to 150 μm.

In addition, from the viewpoint of fixing to a water-retaining material such as a fibrous material and controlling the reaction well, it is also preferable to use an oxidizable metal containing 50 mass% or more of a powder having a particle size of 0.1 to 150 μm.

The particle size of the oxidizable metal is the maximum length in the form of powder, and can be measured by classification using a sieve, a dynamic light scattering method, a laser diffraction method, or the like, and among them, the measurement by the laser diffraction method is preferable.

The content of the oxidizable metal in the steam generating unit 40 is preferably 100g/m in basis weight from the viewpoint of being able to raise the heat generation temperature of the steam generating unit 40 to a desired temperature and to obtain durability²Above, more preferably 200g/m²Above, more preferably 300g/m²The above. From the same viewpoint, the content of the oxidizable metal in the steam generator 40 is preferably 3000g/m in basis weight²Hereinafter, more preferably 2000g/m²Hereinafter, 1500g/m is more preferable²The following.

Here, the content of the oxidizable metal can be determined by an ash test or a thermogravimetric analyzer according to JIS P8128. Further, the amount can be determined by a vibration sample type magnetization measurement test or the like using the property that magnetization occurs when an external magnetic field is applied. Among them, it is preferably determined by a thermogravimetric analyzer.

The water absorbing agent is not particularly limited as long as it can retain water, and examples thereof include 1 or 2 or more selected from carbon components, fibrous materials, water absorbing polymers, and water absorbing powders. The water absorbing agent is suitably used depending on the form of the water vapor generating part 40.

As the carbon component, a carbon component having a water holding capacity, an oxygen supplying capacity and a catalytic capacity can be used, and for example, 1 or 2 or more selected from activated carbon, acetylene black and graphite can be used. Among them, activated carbon is preferable, and 1 or 2 or more kinds of fine powder or granules selected from coconut shell carbon, wood flour carbon, and peat are more preferable. Among these, wood flour carbon is more preferable from the viewpoint of obtaining a good warming and humidifying effect.

The water-absorbing agent preferably has an average particle diameter of 10 μm or more, more preferably 12 μm or more, and still more preferably 15 μm or more. In addition, the average particle diameter of the water absorbing agent is preferably 200 μm or less, more preferably 150 μm or less, and further preferably 100 μm or less.

The average particle diameter of the water-absorbing agent is the maximum length in the form of powder, and can be measured by a dynamic light scattering method, a laser diffraction method, or the like, and among them, the measurement by a laser diffraction method is preferable. The carbon component is preferably in the form of powder, but carbon components other than powder, for example, carbon components in the form of fibers, may be used.

As the fibrous material, natural or synthetic fibrous materials can be used without particular limitation.

Examples of the natural fibrous materials include plant fibers such as cotton, kapok, wood pulp, non-wood pulp, peanut protein fiber, corn protein fiber, soybean protein fiber, mannan fiber, rubber fiber, hemp, abaca, sisal, new zealand hemp, apocynum venetum, palm, rush, and straw. Further, animal fibers such as wool, goat wool, mohair, cashmere, alpaca, angora, camel hair, vicuna hair, silk, feather, down feather, feather hair (feather), alginate fiber, chitin fiber, and casein fiber are exemplified. Further, mineral fibers such as asbestos are exemplified.

On the other hand, examples of synthetic fibrous materials include semisynthetic fibers such as rayon, viscose rayon, cuprammonium, acetate, triacetate, acetate oxide, Promix (Promix), chlorinated rubber, and hydrochloric rubber. Examples of the fibers include nylon, aramid, polyvinyl alcohol, polyvinyl chloride, and polyvinylidene chloride, and also include polyester such as polyethylene terephthalate, and synthetic polymer fibers such as polyacrylonitrile, acrylic acid, polyethylene, polypropylene, polystyrene, and polyurethane. Further, metal fibers, carbon fibers, glass fibers, and the like may also be used. These fibers may be used alone or in combination. Among these, wood pulp, cotton, polyethylene fiber, and polyester fiber are preferably used in view of fixing property with an oxidizable metal or a reaction accelerator, flexibility and oxygen permeability of the water vapor generating section 40, a function of maintaining a sheet form, a production cost, and the like. Wood pulp and cotton have a function of supporting and immobilizing solid matter such as iron powder.

Examples of the water-absorbent polymer include hydrophilic polymers having a crosslinked structure capable of absorbing and holding a liquid 20 times or more the weight of its own weight.

The water-absorbing powder includes 1 or 2 or more kinds selected from vermiculite, calcium silicate, sawdust, alumina, silica gel, and pulp powder.

When the water vapor generating unit 40 is in the form of a sheet, a fibrous material is preferably used as the water absorbing agent. This is because the fibrous material functions as a water-retaining material and the steam generating section 40 functions to maintain the sheet form. As a result, the oxidizable metal is less likely to be biased, and the heat generation temperature distribution of the steam generating unit 40 becomes uniform.

When the water vapor generating part 40 is a mixture of powders, it is preferable to use a super absorbent polymer, vermiculite, calcium silicate, silica gel, porous silica, alumina, wood powder, or the like as the water absorbing agent.

The content of the water absorbing agent is preferably 0.3 parts by mass or more, more preferably 1 part by mass or more, and further preferably 3 parts by mass or more, per 100 parts by mass of the oxidizable metal. In this way, the water vapor generation unit 40 thus obtained can store the water necessary for continuing the oxidation reaction. The content of the water absorbing agent is preferably 100 parts by mass or less, more preferably 80 parts by mass or less, and still more preferably 60 parts by mass or less, per 100 parts by mass of the oxidizable metal. Thus, the supply of oxygen to the steam generator 40 is sufficiently obtained, and the steam generator 50 having high heat generation efficiency is obtained. Further, since the heat capacity of the steam generating part 40 with respect to the obtained amount of heat generation can be suppressed to be small, the rise in heat generation temperature becomes large, and a desired temperature rise can be obtained to promote the heat generation reaction.

Further, the content of the water-absorbing agent is preferably 4g/m in terms of basis weight²Above 290g/m²Hereinafter, more preferably 7g/m²Above 160g/m²The following. This makes it possible to reduce the thickness of the steam generating section 40, and to exhibit flexibility without increasing the size of the product. For example, the thickness of the steam generating part 40 may be set to 0.1mm to 2 mm.

Examples of the electrolyte include sulfates, carbonates, chlorides, and hydroxides of alkali metals, alkaline earth metals, and transition metals. Among these, chlorides of alkali metals, alkaline earth metals, or transition metals are preferably used in view of excellent conductivity, chemical stability, and production cost, and among them, sodium chloride, potassium chloride, calcium chloride, magnesium chloride, ferrous chloride, and ferric chloride are preferably used.

The water vapor generation part 40 contains water. The water may be derived from an electrolyte aqueous solution (for example, an aqueous solution of an alkali metal, an alkaline earth metal, or the like), or may be added to the steam generator 40 alone, and is not particularly limited.

The water content in the steam generator 40 is preferably 35 parts by mass or more and 300 parts by mass or less with respect to 100 parts by mass of the oxidizable metal, from the viewpoint of the steam generator 40 generating heat well to accelerate the rise of the heat generation temperature (accelerate the temperature rise time) and from the viewpoint of ensuring the water content necessary for the heat generation reaction and maintaining the heat generation reaction of the steam generator 40 well. That is, the water content of the steam generating unit 40 is set to 35 parts by mass or more and 300 parts by mass or less with respect to 100 parts by mass of the oxidizable metal, so that the heat generation rate is controlled, the heat generation temperature is increased rapidly, and the heat generation temperature is maintained.

From the same viewpoint, the water content of the steam generator 40 is more preferably 40 parts by mass or more, and still more preferably 50 parts by mass or more, per 100 parts by mass of the oxidizable metal. The water content of the steam generator 40 is more preferably 250 parts by mass or less, still more preferably 200 parts by mass or less, and still more preferably 160 parts by mass or less, per 100 parts by mass of the oxidizable metal.

The steam generating part 40 may contain a thickener, a surfactant, a chemical, a flocculant, a colorant, a paper strength enhancer, a pH adjuster (e.g., tripotassium phosphate, etc.), a filler, and the like in addition to the above components.

As the thickener, a substance which absorbs moisture to increase the consistency or imparts thixotropy may be preferably used. Specifically, a polysaccharide thickener selected from alginates such as sodium alginate, gum arabic, tragacanth gum, locust bean gum, guar gum, carrageenan, agar, xanthan gum, and the like; starch-based thickeners such as dextrin, gelatinized starch, and processing starch; cellulose derivative thickeners such as carboxymethyl cellulose, ethyl acetate cellulose, hydroxyethyl cellulose, hydroxymethyl cellulose, and hydroxypropyl cellulose; tackifiers such as polyvinyl alcohol (PVA); metal soap tackifiers such as stearate; mineral thickener such as bentonite, and 1 or more than 2 kinds of them. Among these, from the viewpoint of maintaining the water content in the steam generating unit 40 constant, a polysaccharide thickener is preferable, and xanthan gum is more preferable.

When the water vapor generating part 40 is a coating sheet, the content of the thickener is preferably 0.1 parts by mass or more, more preferably 0.2 parts by mass or more, per 100 parts by mass of the oxidizable metal, from the viewpoint of easy coating. The content of the thickener is preferably 5 parts by mass or less, and more preferably 4 parts by mass or less, per 100 parts by mass of the oxidizable metal. The content of the thickener is preferably 0.1 to 5 parts by mass, more preferably 0.2 to 4 parts by mass, per 100 parts by mass of the oxidizable metal.

When the steam generating unit 40 is in the form of a sheet, it is preferable that a plurality of holes and/or slits are formed. Thus, even if the sheet-like steam generating portion 40 is thin, sufficiently high heat generation characteristics can be obtained, and desired steam release characteristics can be obtained. The area of the hole is 0.01-10 mm²Especially 0.1 to 8mm²It is preferable because sufficient heat generation characteristics can be obtained. For the same reason, it is preferable that the holes are formed in the sheet-like steam generating part 40 at 0.1 to 20/cm²Especially 1 to 15/cm². Examples of the shape of the hole include a circle, a rectangle, a polygon, an ellipse, an oval, or a combination of 2 or more of these. On the other hand, when the slit is formed, the length thereof is preferably 1 to 50mm, and particularly preferably 5 to 30 mm.

Next, the steam generator 50 will be described with reference to fig. 2.

The steam generator 40 is housed in a steam generator 50 provided in the heating device 100, and the steam generator 50 houses the steam generator 40 in a bag 53 formed of a 1 st sheet 51 and a 2 nd sheet 52.

More specifically, the 1 st sheet 51 is disposed on the user side surface of the steam generator 50, and the 2 nd sheet 52 is disposed on the opposite side surface of the steam generator 50 from the user side.

That is, the water vapor generator 50 is configured by joining the peripheral edges of the 1 st sheet 51 and the 2 nd sheet 52 preferably in a sealed manner. The regions other than the peripheral edge portions of the 1 st sheet 51 and the 2 nd sheet 52 are non-joined regions, and the water vapor generator 40 is disposed in the non-joined regions.

In the present embodiment, the air permeability of the 1 st sheet 51 is 10,000 seconds/100 ml or less, and the air permeability of the 2 nd sheet 52 is higher than that of the 1 st sheet 51.

These sheets will be described in detail below.

In the present embodiment, the surface on the user side of the water vapor generator 50 is the 1 st sheet 51.

The air permeability of the 1 st sheet 51 is 10,000 seconds/100 ml or less. This makes it possible to achieve both an appropriate temperature feeling and a sufficient inflow of air into the heating element.

The air permeability of the 1 st sheet 51 is preferably 8000 sec/100 ml or less, more preferably 7000 sec/100 ml or less, and still more preferably 5000 sec/100 ml or less, from the viewpoint of efficiently supplying the steam generated from the steam generator 50 to the user side. Further, from the viewpoint of improving a sufficient temperature feeling, it is preferable to set the temperature to 2500 seconds/100 ml or less, 1500 seconds/100 ml or less, 500 seconds/100 ml or less, 300 seconds/100 ml or less, 10 seconds/100 ml or less, and 5 seconds/100 ml or less in this order.

On the other hand, the air permeability of the 1 st sheet 51 is preferably 250 seconds/100 ml or more, more preferably 1500 seconds/100 ml or more, and even more preferably 3000 seconds/100 ml or more, from the viewpoint of achieving a good balance of oxygen supply to the steam generator 50 and obtaining a moderate temperature feeling.

As the 1 st sheet 51, for example, a porous sheet made of a synthetic resin having moisture permeability but no water permeability is preferably used. Specifically, a film obtained by stretching polyethylene containing calcium carbonate or the like can be used. When this porous sheet is used, various fiber sheets represented by 1 or 2 or more kinds of nonwoven fabrics selected from a needle-punched nonwoven fabric, a hot-melt nonwoven fabric such as a hot-air nonwoven fabric, a spun-bonded nonwoven fabric, and the like may be laminated on the outer surface of the porous sheet to improve the texture of the 1 st sheet 51.

The sheet 51 of the 1 st sheet is not particularly limited as long as it satisfies the air permeability, and a sheet such as a nonwoven fabric may be used, or a gas impermeable sheet having no air permeability in a part thereof may be used.

The 2 nd sheet 52 may be a sheet having a higher air permeability than the 1 st sheet 51. This makes it easy to supply water vapor to the user from the 1 st sheet 51 side, and makes the balance of oxygen supply to the water vapor generator 50 good, thereby obtaining good warmth.

When the air permeability of the 1 st sheet 51 is 8000 sec/100 ml or less, the air permeability of the 1 st sheet 51 is preferably 35% or less, more preferably 20% or less, further preferably 10% or less, and further more preferably 5% or less with respect to the air permeability of the 2 nd sheet 52. It is intended that the higher the air permeability of the 1 st sheet 51 is, the more difficult it is for the water vapor generated from the water vapor generator 50 to be released from the 1 st sheet 51 side. Therefore, by setting the air permeability of the 1 st sheet 51 to 35% or less with respect to the air permeability of the 2 nd sheet 52, the air permeability of the 1 st sheet 51 and the air permeability of the 2 nd sheet 52 are set to be as different as possible, and thus, the water vapor can be easily released from the 1 st sheet 51 side, and a good moist feeling can be obtained.

The air permeability of the 2 nd sheet 52 is preferably 250 seconds/100 ml or more, more preferably 1000 seconds/100 ml or more, even more preferably 5000 seconds/100 ml or more, even more preferably 7000 seconds/100 ml or more, and particularly preferably 8000 seconds/100 ml or more. This suppresses excessive inflow of air to the heating element, and improves the temperature, steam, and sustainability. Further, from the viewpoint of improving the temperature feeling and the steam feeling and maintaining the sustainability appropriately, 10000 seconds/100 ml or more, 30000 seconds/100 ml or more, and 80000 seconds/100 ml or more (air-tightness) are preferable.

When the air permeability is low to some extent, oxygen is easily taken in, the amount of steam generation increases, and a moist feeling is obtained. From the viewpoint of improving the inflow of air into the heat generating element and improving the temperature-sensitive steam sensation and the durability, the air permeability of the 2 nd sheet 52 is preferably 12000 seconds/100 ml or less, more preferably 10000 seconds/100 ml or less, and still more preferably 80000 seconds/100 ml or less.

When the air permeability of the 2 nd sheet 52 is 12,000 seconds/100 ml or less, the air permeability of the 1 st sheet 51 is preferably 20% or less, more preferably 10% or less, and further preferably 5% or less, with respect to the air permeability of the 2 nd sheet 52. That is, even when the air permeability of the 2 nd sheet 52 is low, the water vapor generated from the water vapor generator 50 is easily released from the 2 nd sheet 52 side. Therefore, by setting the air permeability of the 1 st sheet 51 to 20% or less with respect to the air permeability of the 2 nd sheet 52, the air permeability between the 1 st sheet 51 and the 2 nd sheet 52 is set to be as low as possible, and water vapor can be easily released from the 1 st sheet 51 side, whereby a good moist feeling can be obtained.

The 2 nd sheet 52 may be a gas-permeable sheet having gas permeability in a part thereof or a gas-impermeable sheet having no gas permeability, but a sheet having low gas permeability as a whole is preferably used.

As long as the sheet 2 52 satisfies the air permeability, depending on the application, various fiber sheets represented by 1 or 2 or more kinds of nonwoven fabrics selected from needle-punched nonwoven fabrics, hot-air nonwoven fabrics, and spun-bonded nonwoven fabrics may be laminated on the outer surface of one or more layers of synthetic resin films or the one or more layers of synthetic resin films, thereby improving the texture of the sheet 2 52. Specifically, a 2-layer film composed of a polyethylene film and a polyethylene terephthalate film, a laminated film composed of a polyethylene film and a nonwoven fabric, a laminated film composed of a polyethylene film and a pulp sheet, and the like can be used, but a laminated film composed of a polyethylene film and a pulp sheet is particularly preferable.

Among them, from the viewpoint of achieving a good balance of oxygen supply to the steam generator 50 and obtaining a moderate temperature feeling by easily releasing steam from the 1 st sheet 51 side, it is preferable to set the air permeability of the 1 st sheet 51 to 10000 seconds/100 ml or less and the air permeability of the 2 nd sheet 52 to 80000 seconds/100 ml or more, more preferably to set the air permeability of the 1 st sheet 51 to 2500 seconds/100 ml or less and the air permeability of the 2 nd sheet 52 to 80000 seconds/100 ml or more, still more preferably to set the air permeability of the 1 st sheet 51 to 300 seconds/100 ml or less and the air permeability of the 2 nd sheet 52 to 12000 seconds/100 ml or more.

Further, an air-impermeable or air-impermeable sheet may be disposed on the surface of the water vapor generation unit 40 opposite to the surface on the user side, that is, between the water vapor generation unit 40 and the outermost layer of the warming device 100 opposite to the user side, and an air-impermeable sheet is more preferably disposed. This suppresses leakage of the steam generated by the steam generating unit 40 to the outside of the mask, and facilitates application of the steam to the inside of the mask, i.e., the user side.

Next, an example of a method of manufacturing the steam generator 40 and the steam generator 50 will be described.

When the water vapor generation unit 40 is in the form of a sheet, for example, a wet paper making method or an extrusion method using a die coater, which is described in japanese patent application laid-open No. 2003-102761 of the present applicant, may be used. In this case, first, a sheet-shaped water vapor generator 40 is obtained by forming a formed sheet containing an oxidizable metal, a water-absorbing agent, and a reaction accelerator by a wet paper making method, and adding an aqueous electrolyte solution to the formed sheet. The obtained sheet-like steam generating unit 40 may be used in 1 sheet, or a plurality of sheets may be used in a stacked manner. Alternatively, 1 sheet of the steam generating part 40 may be folded, and the plurality of folded steam generating parts 40 may be used in a stacked manner.

When the steam generating part 40 is made of powder, the steam generating part 40 of powder can be obtained by uniformly mixing the constituent materials. More specifically, first, a water-absorbing agent such as a super absorbent polymer is uniformly mixed with an oxidizable metal, and an aqueous electrolyte solution is added thereto to attach the oxidizable metal to the surface of the water-absorbing agent. Then, by adding a reaction accelerator or the like as a surplus material, the water vapor generation part 40 can be prepared. By preparing the steam generation part 40 in this manner, the rise time of the oxidation reaction becomes fast, and the amount of steam evaporated per unit time can be increased.

In the case where the water vapor generating unit 40 is formed of a coating sheet, for example, a continuous long product of a heat generating material including a heat generating layer and a water retaining sheet may be cut into an arbitrary size by applying a heat generating powder aqueous dispersion to the water retaining sheet by the method described in japanese patent application laid-open No. 2013-146554 of the present applicant. The steam generating unit 40 may be 1 sheet, or may be housed in a multilayer state in which a plurality of sheets are stacked.

Here, the following describes a configuration in a case where the water vapor generation unit 40 is formed of a coating sheet.

As shown in fig. 2, the water vapor generation section 40 has a water vapor generation layer 40A between the base material layer 40B and the water-retaining sheet 40C. The water vapor generation layer 40A is in direct contact with the water retaining sheet 40C. In the present embodiment, the steam generating unit 40 is provided in the bag body made of the 1 st sheet 51 and the 2 nd sheet 52 constituting the steam generating body 50, but it is preferable that the 1 st sheet 51 is disposed on the water holding sheet 40C side and the base layer 40B is disposed on the 2 nd sheet 52 side. This enables the steam from the steam generating unit 40 to be efficiently discharged from the 1 st sheet 51, and is suitable for the user.

The steam generation layer 40A may be provided on one surface of the water retaining sheet 40C, or may be provided so as to be sandwiched between the water retaining sheet 40C and the base layer 40B. Fig. 2 shows an example in which the water vapor generation layer 40A is provided so as to be sandwiched between the water-retaining sheet 40C and the base material layer 40B.

The water content of the water-retaining sheet 40C is preferably 50 to 700g/m in terms of basis weight²More preferably 180 to 260g/m². Since the amount of water contained in the water-retaining sheet 40C serves as a source of water vapor generation, the amount of water contained in the water-retaining sheet 40C is preferably set to 50g/m in basis weight ²In this way, a good amount of steam generation can be ensured. The water-retaining sheet 40C also generates air permeation resistance by water absorption (the air permeability is reduced by swelling with water absorption compared to when it is dried). Therefore, the basis weight is preferably set to 700g/m²Hereinafter, since steam can be easily released from the water retaining sheet 40C and air permeability to the steam generating layer 40A is sufficiently ensured, oxygen supply can be sufficiently obtained and the steam generating portion 40 having high heat generation efficiency can be obtained.

The water-retaining sheet 40C preferably has an air permeability of 500 seconds/100 ml or less in terms of an air permeability in a state containing moisture, and more preferably 300 seconds/100 ml or less, and even more preferably 50 seconds/100 ml or less, in consideration of air permeability and ease of passage of steam.

The lower limit value of the air permeability in a state containing water (i.e., the water content is 15 to 30 mass% of the maximum water absorption amount of the water-retaining sheet 40C) is, for example, 1 second/100 ml.

Here, as the water-retaining sheet 40C, a sheet material that can absorb and retain water and has flexibility can be used. Examples of such a material include a fibrous sheet made of fibers such as paper, nonwoven fabric, woven fabric, and knitted fabric. In addition, porous bodies such as sponges can be used. Examples of the fibers include fibers mainly composed of natural fibers such as plant fibers and animal fibers, and fibers mainly composed of chemical fibers. Examples of the plant fiber include 1 or 2 or more selected from cotton, kapok, wood pulp, non-wood pulp, peanut protein fiber, corn protein fiber, soybean protein fiber, mannan fiber, rubber fiber, hemp, abaca, sisal, new zealand hemp, apocynum venetum, palm, rush, and wheat straw. Examples of the animal fibers include 1 or 2 or more selected from wool, goat wool, mohair, cashmere, alpaca, angora rabbit hair, camel hair, vicuna hair, silk, feather, down feather, feather hair, alginate fiber, chitin fiber, and casein fiber. As the chemical fiber, for example, 1 or 2 or more selected from rayon, acetate, and cellulose can be used.

Among these, the water-retaining sheet 40C preferably contains a fibrous material composed of the above fibers and a water-absorbing polymer.

The use of a hydrogel material capable of absorbing and holding 20 times or more of its own weight of liquid and capable of gelling as the water-absorbent polymer is preferable because the water content in the water-retaining sheet 40C can be maintained at 15 to 30 mass% of the maximum water absorption capacity of the water-retaining sheet 40C.

Examples of the shape of the water-absorbent polymer particles include spherical, block, string, and fiber shapes.

From the viewpoint of ease of handling during production, the particle diameter of the water-absorbent polymer particles is preferably 1 μm or more, and more preferably 10 μm or more. From the viewpoint of the water absorption rate, the particle diameter of the water-absorbent polymer particles is preferably 1000 μm or less, and more preferably 500 μm or less.

The particle diameter of the water-absorbent polymer particles is preferably 1 μm to 1000 μm, more preferably 10 μm to 500 μm.

The particle diameter of the water-absorbent polymer particles can be measured by a dynamic light scattering method, a laser diffraction method, or the like, and among them, the measurement by a laser diffraction method is preferable.

Specific examples of the water-absorbent polymer include 1 or 2 or more selected from the group consisting of polyacrylic acids and salts thereof such as starch, crosslinked carboxymethylated cellulose, and polymers or copolymers of acrylic acid or alkali metal salts of acrylic acid, and polyacrylate graft polymers. Among them, polyacrylic acid and salts thereof such as polymers or copolymers of acrylic acid or acrylic acid alkali metal salts, and polyacrylate grafted polymers are preferably used.

The base material layer 40B is provided on the surface of the water vapor generation layer 40A opposite to the water retaining sheet 40C. The base material layer 40B is in direct contact with the water vapor generation layer 40A, and covers the water vapor generation layer 40A. The substrate layer 40B is preferably a gas-impermeable or gas-impermeable sheet, and for example, a resin sheet is preferably used. By providing the sheet having gas impermeability or poor gas permeability (50000 seconds/100 ml or more, preferably 80000 seconds/100 ml or more), not only can the steam be released more reliably from the water-retaining sheet 40C side, but also the vaporization heat can be prevented from being extracted from the base layer 40B side.

Examples of the substrate layer 40B include a synthetic resin film, a polyethylene film, and a polyethylene terephthalate film.

Further, when the water holding sheet 40C is formed on the water vapor generation layer 40A and the base material layer 40B is not provided, the water vapor generation unit 40 may directly contact the 2 nd sheet 52. In this case, the 2 nd sheet 52 is preferably a sheet having water resistance.

The steam generator 50 can be obtained by housing the steam generator 40 configured as described above in the bag 53 formed of the 1 st sheet 51 and the 2 nd sheet 52. The bag 53 is obtained by joining the peripheral edges of the 1 st sheet 51 and the 2 nd sheet 52, and any of the conventionally known joining methods may be used.

Next, the outer package 60 will be explained. The heating device 100 of the present embodiment further accommodates the steam generator 50 in the outer package 60.

The outer package 60 is generally made of a material having no air permeation resistance. For example, the nonwoven fabric is a nonwoven fabric such as a hot air nonwoven fabric which is a sheet material having a good texture. In this case, the nonwoven fabric preferably has air permeability to such an extent that the nonwoven fabric does not inhibit the passage of water vapor. Further, it is more preferable that the nonwoven fabric has a suitable water repellency so as not to hinder the passage of water vapor due to wetting with water vapor and to prevent the inflow of air.

The length of the outer package 60 in the longitudinal direction is preferably 12cm or more, more preferably 13cm or more, and still more preferably 14cm or more.

The length of the outer package 60 in the longitudinal direction is preferably 20cm or less, more preferably 18cm or less, and still more preferably 16cm or less.

By setting the length of the outer package 60 in the longitudinal direction within this range, the heating device 100 can be appropriately attached to the user, and the generated water vapor can be retained in the space formed by the heating device 100.

On the other hand, the length of the outer package 60 in the short side direction is preferably 5cm or more, more preferably 6cm or more, and still more preferably 7cm or more.

The length of the outer package 60 in the short side direction is preferably 10cm or less, more preferably 9.5cm or less, and still more preferably 9cm or less.

By setting the length of the outer package 60 in the short side direction to this range, the water vapor generated from the warming device 100 can be effectively applied to the mouth and nose of the user.

In the present specification, the heating device 100 is generally used in a form of being bent at a portion corresponding to the bridge of the nose of the user, and the "longitudinal direction" is a direction perpendicular to the bending line, and the "short-side direction" is a direction parallel to the bending line.

The "length in the longitudinal direction" and the "length in the short direction" of the outer package 60 may be defined as an average value of the lengths of the outer package 60 that are desirable for each direction.

In the warming instrument 100, the outer package 60 has a slit 70. The slit 70 is a projection forming portion for forming a projection facing the inside of the mask.

In the heating device 100, the slits 70 extend from the end portions of the outer package 60 toward the center portion of the outer package 60 in the region separating the pair of water vapor generators 50 in the outer package 60. For example, as shown in fig. 1, the slit 70 is a linear cut extending from the lower end of the outer package 60 toward the center of the outer package, and is provided in the center of the outer package in the longitudinal direction. The slit 70 has a function of deforming the shape of the warming instrument 100 so as to follow the irregularities of the face of the user when the warming instrument 100 is used. This suppresses the water vapor generator 50 from coming into close contact with a part of the face of the user, and provides an appropriate space between the user and the warming apparatus 100.

The method of forming the slit 70 is not particularly limited, and a known method can be used. The slit 70 is not limited to being provided in the heating device 100 in advance, and a dotted line may be provided at a position of the outer package 60 where the slit 70 is disposed, and the slit 70 may be formed by cutting the dotted line with a hand or scissors by a user or the like.

The slit 70 is provided substantially parallel to the short side direction of the warmer 100. The length of the slit 70 may be appropriately set according to the use of the warmer 100, but is preferably 0.5cm or more, more preferably 0.7cm or more, and still more preferably 1cm or more.

The length of the slit 70 is preferably 7cm or less, more preferably 6.5cm or less, and still more preferably 6cm or less.

In addition, from the viewpoint of providing an appropriate space between the user and the heating device 100, the length of the slit 70 is preferably 3% or more, more preferably 5% or more, and even more preferably 10% or more of the length of the outer package 60 in the short side direction.

From the viewpoint of ensuring the strength of the heating device 100, the length of the slit 70 is preferably 70% or less, more preferably 60% or less, and even more preferably 50% or less of the length of the outer package 60 in the short side direction.

The length of the slit 70 is defined as a total value of the lengths of the slits 70 when the slit 70 is provided in plural.

The amount of water vapor generated by the warming device 100 is preferably 50mg/10min or more, more preferably 100mg/10min or more, further preferably 300mg/10min or more, further more preferably 500mg/10min or more, and particularly preferably 600mg/10min or more as the whole warming device 100, from the viewpoint of giving a moderate feeling of vapor to the mask user.

On the other hand, the amount of water vapor generated by the heating device 100 is preferably 2400mg/10min or less, more preferably 2000mg/10min or less, further preferably 1600mg/10min or less, further more preferably 1400mg/10min or less, and particularly preferably 1000mg/10min or less as the whole of the heating device 100, from the viewpoint of suppressing condensation on the mask.

In addition, the amount of steam generated per unit area of the steam generator 50 when viewed from above is preferably 1mg/cm from the viewpoint of giving a moderate feeling of steam to the mask user²10min or more, more preferably 1.5mg/cm²10min or more, more preferably 5mg/cm²10min or more, more preferably 7mg/cm²10min or more, particularly preferably 9mg/cm ²10min or more.

In addition, the amount of water vapor generated per unit area of the water vapor generator 50 when viewed from above is preferably 20mg/cm from the viewpoint of suppressing condensation on the mask²10min or less, more preferably 18mg/cm²10min or less, more preferably 15mg/cm²10min or less.

[ method for measuring amount of steam generated ]

Here, the amount of water vapor generated by the warming appliance 100 is a value measured in the following manner using the device 30 shown in fig. 3.

The apparatus 30 shown in fig. 3 is composed of a measuring chamber (volume 4.2L)31 made of aluminum, an inflow path 32 for allowing dehumidified air (humidity less than 2%, flow rate 2.1L/min) to flow into a lower portion of the measuring chamber 31, an outflow path 33 for allowing air to flow out from an upper portion of the measuring chamber 31, an inlet hygrothermograph 34 and an inlet flow meter 35 provided in the inflow path 32, an outlet hygrothermograph 36 and an outlet flow meter 37 provided in the outflow path 33, and a thermometer (thermistor) 38 provided in the measuring chamber 31. As the thermometer 38, a thermometer having a temperature resolution of about 0.01 ℃ was used.

The measurement was carried out by taking the warming instrument 100 out of the oxygen-blocking bag at a measurement ambient temperature of 30 ℃ (30 ± 1 ℃), placing the user-side surface of the warming instrument 100, i.e., the water vapor-releasing surface, on the measurement chamber 31, and placing the thermometer 38 with a metal ball (4.5g) thereon. In this state, the dehumidified air flows in from the lower portion, the difference in absolute humidity before and after the air flows into the measurement chamber 31 is obtained from the temperatures and humidities measured by the inlet thermo-hygrometer 34 and the outlet thermo-hygrometer 36, and the amount of water vapor released from the heater 100 is calculated from the flow rates measured by the inlet flow meter 35 and the outlet flow meter 37. The amount of water vapor generated in the present specification means the total amount measured from the time when the warmer 100 is taken out from the oxygen-blocking bag to 10 minutes later.

The maximum absolute humidity in the mask 150 in the use of the warmer 100 is preferably 12g/m from the viewpoint of comfortable steam generation for the user³Above, more preferably 13g/m³Above, more preferably 14g/m³The above.

In addition, from the viewpoint of preventing condensation in the mask 150, the maximum value of the absolute humidity in the mask 150 in the use of the warmer 100 is preferably 35g/m³Hereinafter, more preferably 33g/m³Hereinafter, more preferably 30g/m³The following.

In the present embodiment, the average absolute humidity in the mask 150 in the use of the warmer 100 is preferably 11.7g/m from the viewpoint of providing comfortable steam to the user³Above, more preferably 12g/m³Above, it is more preferably 13g/m³Above, more preferably 14g/m³Above, it is particularly preferably 15g/m³The above.

In addition, the mask 15 is used for preventingFrom the viewpoint of 0 internal condensation, the average absolute humidity in the mask 150 in use of the warmer 100 is preferably 35g/m³Hereinafter, more preferably 30g/m³Hereinafter, it is more preferably 25g/m³The following.

The absolute humidity of the warmer 100 during use can be measured as follows.

[ Absolute humidity measurement conditions ]

In an environment of 20 ℃ 60% RH, a temperature and humidity sensor (SHT 71 manufactured by sensory Japan co., ltd.) was attached to the under-nose portion of a head model prepared using male head data (52 average japanese adult male) of Digital Human Technology inc., and a ventilator (harvarpparatus DUAL PHASE CONTROL respirotor (manufactured by HARVARD APPARATUS) was used from the nose portion of the head model, and inhalation was performed at a frequency of 500ml for 1 minute and 15 times, 1 time, under a condition of 1 minute and 15 times. In this state, the thermal appliance 100 and the mask 150 are worn on the model in this order, and the temperature and humidity changes are measured and recorded. Examples of the recording meter include EK-H4 manufactured by Sensorion Japan Co., Ltd. The absolute humidity was calculated from the temperature and the relative humidity, and the maximum absolute humidity and the average absolute humidity for 10 minutes were obtained.

As the mask herein, a common size mask of a commercially available folding mask is used.

Next, a method of using the warmer 100 will be described.

Fig. 4 is a diagram showing an example in which the warming apparatus 100 is applied to a user. As shown in fig. 4, the warmer 100 is used by being disposed inside a mask 150 that covers the mouth and nose of the user. That is, the warmer 100 is disposed between the mask 150 and the user. The mask 150 and the warmer 100 are not limited to being in direct contact with each other, and may be in a non-contact area or may be in partial contact with each other.

The mask 150 may be a conventionally known mask. The sheet material forming the main body of the mask 150 may have a single structure (i.e., 1 layer), or may have a structure in which a plurality of sheet materials are integrally laminated (i.e., a plurality of layers), for example.

The mask 150 may have a three-dimensional shape conforming to the contour of the face of the user, or may have a flat shape of the mask body.

The material of the main body of the mask 150 may be any material conventionally used in the mask art, and its kind is not particularly limited as long as it has a certain air permeability. For example, a fibrous sheet such as a nonwoven fabric or a gauze can be used, and a nonwoven fabric is preferably used from the viewpoint of ease of processing and economy. As a fiber material of the nonwoven fabric, for example, a nonwoven fabric made of a polyester selected from polyethylene terephthalate (PET); polyolefins such as Polyethylene (PE), polypropylene (PP), and ethylene-propylene copolymers; artificial silk; cotton, etc. and 1 or 2 or more kinds of fibers. As the nonwoven fabric, a nonwoven fabric produced by using fibers of the above 1 or 2 or more types of raw materials by a hot air method, a spunbond method, a needle punch method, a melt blowing method, a carding method, a hot melt method, a spunlace method, a solvent bonding method, or the like can be used.

The method of disposing the warmer 100 inside the mask 150 is not particularly limited, and for example, the warmer 100 may be sandwiched between the mask 150 and the face of the user, or the warmer 100 may be fixed to the inner surface of the mask 150 using an adhesive or the like. Specifically, an adhesive layer may be provided on the surface of the exterior body 60 of the heating device 100 on the 2 nd sheet 52 side. The pattern for forming the adhesive layer is not particularly limited, and a stripe-shaped or spiral-shaped normal coating pattern may be used.

When the heater 100 is disposed inside the mask 150, the region across the slit 70 may be overlapped so as to close the slit 70 of the heater 100, and the exterior body 60 may be protruded toward the mask 150 to form a three-dimensional shape. This can prevent the water vapor generator 50 from being in close contact with a part of the face of the user, and can provide a space between the face of the user and the warming apparatus 100. Further, the overlapping portions of the regions with the slits 70 therebetween may be fixed by an adhesive or the like, so that the three-dimensional shape can be easily maintained.

Next, the operation and effect of the warmer 100 according to the present embodiment will be described.

First, in the heating device 100 of the present embodiment, the slits 70 are provided in the outer package 60, so that the convex portions can be easily formed in the heating device 100, and the steam generator 50 can be suppressed from being in close contact with a part of the face of the user, and as a result, excessive heating can be suppressed. Further, by forming the convex portion in the heating unit 100 and disposing an appropriate space between the user and the heating unit 100, air can sufficiently flow into the heating element. In addition, by making the air permeability of the 1 st sheet 51 side lower than that of the 2 nd sheet 52, the air is positively taken in and out of the 1 st sheet 51 side, that is, the sealed space formed between the user and the heating device 100. This makes it easy to appropriately adjust the amount of oxygen supplied to the steam generator 50, and thus, excessive or insufficient heat generation can be suppressed, and a good warming effect can be obtained.

The embodiments of the present invention have been described above with reference to the drawings, but these are examples of the present invention, and various configurations other than the above-described configurations may be adopted.

For example, in the present embodiment, the case where one slit 70 is provided in the lower portion of the outer package body has been described, but the number of slits 70 may be plural. For example, as in a modification shown in fig. 5, the slits 70 may be provided in the upper and lower portions of the heating device 100. Further, the slit 70 may be provided only in the upper portion of the warmer 100.

In the present embodiment, the slit 70 formed by the linear slit is described as the projection forming portion, but the projection forming portion is not limited thereto, and for example, the following modifications are possible.

Fig. 6 is a schematic view showing a modification of the warmer of the present embodiment, and is a view of the outer package 60 as viewed from the user side. As shown in fig. 6(a), the outer package 60 has a slit 71 cut into a substantially triangular shape as a projection forming portion, and the slit 71 has a vertex facing toward the center of the outer package 60. One narrow gap 71 is provided at the center of the lower edge of the outer package 60. As shown in fig. 6(b), the exterior body 60 may be folded in two so that the user side is inside, the regions across the narrow gap 71 are brought close to each other, and the gap formed by the narrow gap 71 is closed, whereby a mountain-shaped convex portion having the base of the narrow gap 71 as the apex is formed, and the exterior body 60 may be projected toward the mask 150 side. In this case, a partial region of the exterior body 60 may overlap with the gap 71.

The size of the slit 71 is not particularly limited, and may be as large as a size that allows the outer package 60 to easily conform to the face of the user by the convex portion formed by the slit 71, and that is small enough to maintain the strength of the outer package 60 and large enough to allow the user to easily form the convex portion. The size of the narrow gap 71 is the height and the length of the bottom side when viewed as a triangular shape.

Further, the number of the slits may be plural. The shape of the slit is not limited to a substantially triangular shape, and may be a trapezoid, a semicircle, a rectangle, or a combination thereof.

Fig. 7 is a schematic view showing a modification of the warmer according to the present embodiment, and is a view of the outer package 60 as viewed from the user side. As shown in fig. 7(a), the outer package 60 may be formed with a substantially triangular folding line 72 having a vertex extending toward the center of the outer package 60 as a protrusion forming portion. The fold line 72 is provided at the center of the lower edge of the outer package 60, and includes mountain fold portions 72a and 72b and valley fold portions 72 c. As shown in fig. 7(b), the outer package 60 may be folded in two so that the user side is inside, and the mountain fold portions 72a and 72b may be folded in the mountain fold direction and the valley fold portion 72c may be folded in the valley fold direction, thereby forming a triangular protrusion portion on the side opposite to the user of the outer package 60 and protruding the outer package 60 toward the mask 150 side. The protruding portion may be bonded to the outer package 60 with an adhesive or the like.

As shown in fig. 8(a), the folding lines may be 3 straight folding lines 82 extending from the lower end to the upper end of the outer package 60 in the central portion of the outer package 60 and in the region sandwiched between the 2 steam generators 50. The folding line 82 is composed of mountain fold portions 82a, 82b and valley fold portions 82 c. As shown in fig. 8(b), the outer package 60 is folded in two so that the user side is inside, and the mountain fold portions 82a and 82b are folded in mountain and the valley fold portion 82c is folded in valley, whereby a long and thin rectangular protruding portion can be formed on the side opposite to the user of the outer package 60 and the outer package 60 can be protruded toward the mask 150 side. The protruding portion may be bonded to the outer package 60 with an adhesive or the like.

The number, size, shape, and position of the folding lines are not limited to the above examples, and may be appropriately changed from the viewpoint of forming the convex portions.

Further, the convex portion forming portion may be provided with a different kind of material from the outer package 60.

For example, fig. 9 is a schematic view showing a modification of the warmer according to the present embodiment, and is a view of the outer package 60 as viewed from the user side. As shown in fig. 9(a), 2 linear stretchable members 90 may be provided in the central portion of the outer package 60 in the region sandwiched between the 2 steam generators 50, from the lower end to the upper end of the outer package 60. The stretchable member 90 is more stretchable than the outer package 60. Therefore, the region sandwiched by the 2 stretchable members 90 can be made movable. As shown in fig. 9(b), the outer package 60 can be projected toward the mask 150 by projecting the region sandwiched by the stretchable members 90 toward the side of the outer package 60 opposite to the user.

As a material of the stretchable member 90, rubber, a stretchable cloth, and the like can be cited, but from the viewpoint of lightweight property, skin touch, and the like, a stretchable cloth is preferable, and a nonwoven fabric is more preferable.

The number, size, shape, position, and the like of the stretchable members 90 are not limited to the above examples, and may be appropriately changed from the viewpoint of forming the convex portions.

In the above embodiment, the present invention further discloses the following heating appliance.

< 1 > a warming device which is disposed on the inner side surface of a mask covering the mouth and nose of a user,

the heating device comprises a pair of steam generators arranged in a longitudinal direction of the heating device, the pair of steam generators being housed in an outer package,

the steam generating body is provided with a bag body which is composed of a 1 st sheet positioned at the user side and a 2 nd sheet positioned at the opposite side of the user side,

the air permeability of the No. 1 sheet is 10,000 seconds/100 ml or less,

the 2 nd sheet has an air permeability higher than that of the 1 st sheet,

the outer package body has a convex portion forming a convex portion facing the mask.

< 2 > a warming device which is disposed on the inner side of a mask covering the mouth and nose of a user,

the heating device comprises a pair of steam generators arranged in a longitudinal direction of the heating device, the pair of steam generators being housed in an outer package,

the steam generating body is provided with a bag body which is composed of a 1 st sheet positioned at the user side and a 2 nd sheet positioned at the opposite side of the user side,

the air permeability of the No. 1 sheet is 8,000 seconds/100 ml or less,

the air permeability of the 1 st sheet is 35% or less of the air permeability of the 2 nd sheet,

the outer package body has a convex portion forming a convex portion facing the inside of the mask.

The heating device of < 3 > such as < 1 > or < 2 >, wherein the projection forming portion is a gap extending from an end portion of the outer package toward a central portion of the outer package in a region separating the pair of water vapor generating bodies.

The heating device of any of < 4 > to < 3 >, wherein the amount of water vapor generated by the entire heating device is preferably 50mg/10min or more, more preferably 100mg/10min or more, further preferably 300mg/10min or more, further more preferably 500mg/10min or more, particularly preferably 600mg/10min or more, and further preferably 2400mg/10min or less, more preferably 2000mg/10min or less, further preferably 1600mg/10min or less, further more preferably 1400mg/10min or less, and particularly preferably 1000mg/10min or less.

The warming device according to any one of < 5 > and < 1 > to < 4 >, wherein the water vapor generator includes a water vapor generator containing an oxidizable metal, a water absorbing agent, and water.

< 6 > the warmer as < 5 >, wherein the oxidizable metal is preferably a powder or fiber of 1 or 2 or more selected from the group consisting of iron, aluminum, zinc, manganese, magnesium, and calcium, and more preferably iron powder.

The heating appliance of < 7 > such as < 5 > or < 6 >, wherein the water absorbing agent is preferably 1 or 2 or more selected from the group consisting of activated carbon, acetylene black and graphite, more preferably activated carbon, still more preferably 1 or 2 or more selected from the group consisting of coconut shell carbon, wood flour carbon and peat, in the form of powder or granules, and particularly preferably wood flour carbon.

The heater of any of < 8 > such as < 5 > to < 7 >, wherein the amount of water in the water vapor generation part is preferably 35 parts by mass or more, more preferably 40 parts by mass or more, and still more preferably 50 parts by mass or more per 100 parts by mass of the oxidizable metal, and is preferably 300 parts by mass or less, more preferably 250 parts by mass or less, still more preferably 200 parts by mass or less, and particularly preferably 160 parts by mass or less per 100 parts by mass of the oxidizable metal.

The warming device of any one of < 9 > such as < 1 > to < 8 >, wherein the length of the gap is preferably 0.5cm or more, more preferably 0.7cm or more, further preferably 1cm or more, and further preferably 7cm or less, more preferably 6.5cm or less, further preferably 6cm or less.

The heating device of any of < 10 > such as < 1 > to < 9 >, wherein the length of the gap is preferably 3% or more, more preferably 5% or more, further preferably 10% or more, of the length of the outer package in the short side direction, and is preferably 70% or less, more preferably 60% or less, further preferably 50% or less, of the length of the outer package in the short side direction.

The heating device of any of < 11 > such as < 1 > to < 10 >, wherein the length of the outer package in the longitudinal direction is preferably 12cm or more, more preferably 13cm or more, further preferably 14cm or more, and further preferably 20cm or less, more preferably 18cm or less, further preferably 16cm or less.

The heating device of any of < 12 > such as < 1 > to < 11 >, wherein the length of the outer package in the short side direction is preferably 5cm or more, more preferably 6cm or more, further preferably 7cm or more, and further preferably 10cm or less, more preferably 9.5cm or less, further preferably 9cm or less.

The warming appliance of any one of < 13 > such as < 1 > to < 12 >, wherein the water vapor generator preferably generates water vapor in an amount of 1mg/cm per unit area²10min or more, more preferably 1.5mg/cm²10min or more, more preferably 5mg/cm²10min or more, more preferably 7mg/cm²10min or more, particularly preferably 9mg/cm²10min or more, and preferably 20mg/cm²10min or less, more preferably 18mg/cm²10min or less, more preferably 15mg/cm²10min or less.

A warming appliance as claimed in any of < 14 > such as < 1 > to < 13 > wherein the maximum absolute humidity within the mask in use of the warming appliance is preferably 12g/m³Above, more preferably 13g/m³Above, more preferably 14g/m³The above is preferably 30g/m³Hereinafter, more preferably 25g/m³Hereinafter, it is more preferably 20g/m³The following.

The warming device of any one of < 15 > such as < 1 > to < 14 > wherein the average absolute humidity within the mask in use of the warming device is preferably 11.7g/m³Above, more preferably 12g/m³Above, it is more preferably 13g/m³In the above-mentioned manner,even more preferably 14g/m ³Above, it is particularly preferably 15g/m³The above is preferably 35g/m³Hereinafter, more preferably 30g/m³Hereinafter, it is more preferably 25g/m³The following.

The warming device of any one of < 16 > such as < 1 > to < 15 > wherein the air permeability of the 2 nd sheet is 250 seconds/100 ml or more and 12,000 seconds/100 ml or less, and the air permeability of the 1 st sheet is 20% or less with respect to the air permeability of the 2 nd sheet.

The warming device according to any of < 17 > such as < 1 > to < 16 >, wherein the air permeability of the 1 st sheet is preferably 8000 sec/100 ml or less, more preferably 7000 sec/100 ml or less, further preferably 5000 sec/100 ml or less, preferably 2500 sec/100 ml or less, 1500 sec/100 ml or less, 500 sec/100 ml or less, 300 sec/100 ml or less, 10 sec/100 ml or less, or 5 sec/100 ml or less.

The warming device according to any of < 18 > such as < 1 > to < 17 > wherein the air permeability of the 1 st sheet is preferably 250 seconds/100 ml or more, more preferably 1500 seconds/100 ml or more, further preferably 3000 seconds/100 ml or more.

The warming device of any of < 19 > such as < 1 > to < 18 > wherein the air permeability of the 2 nd sheet is preferably 250 seconds/100 ml or more, more preferably 1000 seconds/100 ml or more, further preferably 5000 seconds/100 ml or more, particularly preferably 8000 seconds/100 ml or more, preferably in the order of 10000 seconds/100 ml or more, 30000 seconds/100 ml or more, 80000 seconds/100 ml or more.

The heating device of < 20 > or < 1 > or < 2 > wherein the convex portion forming portion is a substantially triangular folding line having a vertex extending from an end portion of the outer package toward a central portion of the outer package in a region separating the pair of water vapor generators.

< 21 > the heating device according to < 1 > or < 2 >, wherein the convex portion forming portion is 3 linear folding lines extending from the lower end to the upper end of the outer package in a region sandwiched between the pair of water vapor generators in the central portion of the outer package.

< 22 > the heating device according to < 1 > or < 2 >, wherein the projection forming portion includes 2 linear stretchable members extending from the lower end to the upper end of the outer package in a region sandwiched between the pair of water vapor generators in the central portion of the outer package.

< 23 > a method of using a warming instrument, wherein the mask is worn in a state where the warming instrument of any one of < 1 > to < 22 > is disposed on the inner side of the mask covering the mouth and nose of a user.

< 24 > the method of using a warmer of < 23 > wherein the convex portion is formed on the outer package body by the convex portion forming portion.

< 25 > such as < 23 > or < 24 > wherein the convex portion forming portion is a gap extending from an end portion of the outer package toward a central portion of the outer package in a region separating the pair of water vapor generating bodies,

the convex portion is formed on the outer package body by overlapping or bringing the regions with the gap therebetween into close proximity with each other so as to close the gap.