JP2021107600A - mask - Google Patents

Abstract

To provide a mask that can generate steam, wherein the mask can reduce the risk of cold burns and that can prevent the oxidation reaction of oxidizable metal from proceeding before use.SOLUTION: A mask 1 has a body part 2 that covers part of a wearer's face, a storage bag 5 that stores a mixture 4, which contains oxidizable metal powder, pro-oxidant and water holding agent and is supplied with water and generates heat by contact with air, and a water holder 6 that holds water and can contact the storage bag 5 to supply the mixture 4 with water. The water holder 6 is disposed closer to the wearer than the storage bag 5. At least part of the water holder 6-contact side of the storage bag 5 has water permeability.SELECTED DRAWING: Figure 2

Description

The present invention relates to a mask that emits steam.

Conventionally, masks have been widely used as a protective measure against fine dust such as pollen and yellow sand, and as a countermeasure against infection such as viruses and bacteria. Recently, the functions of masks have been diversified, and various masks have been proposed. For example, during sleep, the oral cavity may become dry easily because there is no swallowing of food, drink, saliva, or the like. In addition, the air is generally dry in winter, and air conditioners are operating in the office all year round, even outside of winter. Therefore, there are many environments in which the air tends to dry even during the day, and the oral cavity tends to dry.

In order to prevent this, for example, Patent Document 1 discloses a mask having a humidifying function. The mask of Patent Document 1 has a steam generator made of a heating element such as a body warmer attached to a mask main body covering the nose and mouth. The water vapor generator contains a water vapor generating part containing an oxidizing metal such as iron powder, a water absorbing agent, water, an electrolyte, an oxidation accelerator, etc. in a breathable bag body, and the water vapor generating part is in the air. When it comes into contact with the oxygen in the water vapor generating part, an oxidation reaction of the metal to be oxidized contained in the water vapor generating part occurs to generate heat, and this heat heats the water contained in the water vapor generating part to become steam at a predetermined temperature. This water vapor is released to the outside through the bag body and sucked from the wearer's mouth and nose inside the mask body, which has the effects of alleviating the dry feeling of the pharynx and nose and moisturizing the mucous membranes of the throat and nose. Be done.

2019-11547

However, in the mask of Patent Document 1, a water vapor generator accommodating portion is provided on the surface of the mask body on the wearer side, or an adhesive is provided on the surface of the mask body opposite to the wearer side. The water vapor generator is located between the mask body and the wearer's face. Since the temperature of the steam generator itself rises depending on the usage environment, there is a risk of low-temperature burns if the steam generator continues to hit the wearer's face when wearing the mask. In addition, the water vapor generating portion of the water vapor generator contains in advance the water required for the oxidation reaction of the metal to be oxidized, which is an exothermic reaction. Therefore, when air (oxygen) invades the water vapor generating body during mask manufacturing or stock storage, the oxidation reaction of the metal to be oxidized contained in the water vapor generating part proceeds before use, which is desirable at the time of use. There is a risk that heat generation characteristics cannot be obtained.

The present invention has been made by paying attention to the above problems, and in a mask capable of generating steam, the risk of low-temperature burns can be reduced, and the oxidation reaction of the metal to be oxidized is suppressed from proceeding before use. The purpose is to provide a mask that can be used.

The present invention relates to a mask that is worn on the wearer's face and emits vapor. The mask of the present invention comprises a main body covering a part of the wearer's face and a mixture containing an oxidizable metal powder, an oxidation accelerator and a water retaining agent, which is supplied with water and generates heat when in contact with air. A storage bag containing water and a water holder capable of holding water and supplying water to the mixture in contact with the storage bag are provided, and the water holder is arranged closer to the wearer than the storage bag. The storage bag is characterized in that at least a part of the side in contact with the water retainer has water permeability.

The mask of the present invention may be configured to further include a pocket attached to the storage bag and in contact with the storage bag while accommodating the water retainer. Alternatively, the mask of the present invention can be configured to be attached to the main body and further include a storage portion for storing the water holder together with the storage bag.

Further, in the mask of the present invention, the water retainer can be configured to discharge 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture from the time of contact with the storage bag.

Further, in the mask of the present invention, the water retainer can be configured to discharge water by compression deformation.

Further, in the mask of the present invention, the water retainer can be configured to be pressurized at 1800 Pa or more from the time of contact with the storage bag.

Further, in the mask of the present invention, the mixture can be configured to absorb 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture from the time of contact with the water holder.

Further, in the mask of the present invention, the water content of the mixture can be configured to be 5% by mass or less.

Further, in the mask of the present invention, the water-retaining agent can be configured to contain a polyacrylate-based resin having a water absorption rate of 10 seconds or more.

According to the mask of the present invention, the mixture in the storage bag does not contain in advance a sufficient amount of water necessary for the oxidation reaction of the metal to be oxidized, which is an exothermic reaction. Therefore, it is possible to reduce the risk that the oxidation reaction of the metal to be oxidized contained in the mixture proceeds before use due to the intrusion of air into the storage bag during the manufacture of the mask and the storage of the stock. Therefore, when the mixture receives water from the water retainer during use, it exhibits the desired heat generation characteristics, so that the water retainer can be heated well and a sufficient amount of warm steam is supplied to the wearer. be able to.

In addition, since the water retainer is located closer to the wearer than the containment bag, that is, the water retainer is interposed between the containment bag accommodating the heat-generating mixture and the wearer's face. It is possible to prevent the mixture in the storage bag from directly hitting the wearer's face when the mask is worn. Therefore, it is possible to reduce the risk that the storage bag keeps hitting the wearer's face when the mask is worn, causing low-temperature burns or discomfort to the face.

It is (A) front view and (B) rear view of the mask of one embodiment. It is an exploded perspective view of the mask of one embodiment. It is a schematic cross-sectional view of X1-X1 of FIG. It is a front view of the storage bag. It is an exploded perspective view of the mask of another embodiment.

Hereinafter, the actual form of the present invention will be described with reference to the accompanying drawings. The mask of the present invention is worn on the wearer's face and emits warm steam (warm steam) when worn.

1 to 3 show the mask 1 of the present embodiment. The mask 1 includes a main body 2 that covers a part of the wearer's face (area under the eyes, particularly the nose and mouth) when worn, and a pair of left and right ear hooks 3 for holding the main body 2 on the wearer's face. A storage bag 5 containing the mixture 4 (shown in FIG. 3), a water retainer 6 holding water that can be supplied to the mixture 4, and a pocket 7 that contacts the storage bag 5 while storing the water retainer 6. And. The mixture 4 in the storage bag 5 receives water from the water retainer 6 in contact with the storage bag 5 and generates heat when it comes into contact with oxygen in the air. The storage bag 5 heats the water retainer 6 in contact with the storage bag 5 by the heat generated by the mixture 4. As a result, warm steam is emitted from the water retainer 6 when the mask 1 is attached. Hereinafter, the constituent members of the mask 1 will be described in detail.

Main body As shown in FIGS. 1 to 3, the main body 2 has a rectangular shape in a plan view. When the mask 1 is worn, the main body 2 has an upper edge 20 extending laterally under the eyes of the wearer's face, a lower edge 21 extending laterally to the lower jaw (or submandibular gland), an upper edge 20 and a lower edge 21. It has left and right side edges 22 and 23 for connecting the above. The size of the main body 2 is not particularly limited, and may be, for example, a size in which the left and right side edges 22 and 23 traverse the cheeks and cover the nose, mouth, lower jaw, and part of the cheeks of the face.

The main body 2 may have a single-layer structure or a laminated structure of two or more layers, and each layer is not particularly limited, but may be configured by using a breathable sheet such as a woven fabric or a non-woven fabric. Among them, the non-woven fabric by the spunbond method, the melt blow method, the thermal bond method or the spunlace method is preferably exemplified, and more preferably, the non-woven fabric by the spunbond method is exemplified from the viewpoint of touch and shape retention, and pollen, virus and the like. From the viewpoint of cutting performance, a non-woven fabric produced by the melt blow method is exemplified. In consideration of the above points, an SMS layer (three-layer structure of spunbond-melt blow-spunbond) is exemplified as a suitable layer structure of the main body 2. In addition, an S layer (single layer of spunbond) or an SS layer (two-layer structure of spunbond-spanbond) is preferably exemplified. When the main body 2 has a laminated structure, the outer peripheral edges of the sheets of each layer are joined to each other with a predetermined width by a known method such as adhesion, welding (heat welding, ultrasonic welding, etc.), suturing, etc. Part 2 can be formed.

As the fiber material of the woven fabric and the non-woven fabric constituting each layer of the main body 2, known materials can be used, and the fiber material is not particularly limited, but is limited to natural fibers such as paper and cotton, semi-synthetic fibers such as rayon and acetate, and polypropylene. , Synthetic fibers such as polyethylene, polyester and nylon are exemplified. Among them, polypropylene and polyethylene are preferably exemplified from the viewpoint of productivity, polypropylene is preferably exemplified from the viewpoint of shape retention, and nylon is preferably exemplified from the viewpoint of touch.

A linear nose piece 8 made of, for example, a plastic resin such as polyethylene or a biodegradable resin is provided at a position below the upper edge 20 of the main body 2. Since the nose piece 8 prevents a gap from being formed between the wearer's nose and the main body portion 2, the main body portion 2 can be fitted to the face. The nose piece 8 is predetermined by, for example, being built in the main body 2 and joining the sheets of each layer constituting the main body 2 at the vertical positions thereof by, for example, adhesion, welding (heat welding, ultrasonic welding, etc.), suturing, or the like. Can be fixed in position.

The main body 2 has a flat shape before the mask 1 is worn (when not in use). Further, the main body portion 2 has a structure that can be extended in the vertical direction (vertical direction). For example, the main body 2 is provided with at least one pleat 24 formed by at least two folds extending in the lateral direction (left-right direction). By expanding the pleats 24, the main body 2 can be extended in the vertical direction, and the size of the main body 2 can be freely adjusted according to the size of the wearer's face.

Ear hooks As shown in FIGS. 1 and 2, the pair of left and right ear hooks 3 are attached to the left and right side edges 22 and 23 of the main body 2. The ear hook portion 3 has, for example, a string shape or a band shape (band shape), and can be attached to the main body portion 2 by a known method such as adhesion, welding (heat welding, ultrasonic welding, etc.), suturing, or the like. The material of the ear hook portion 3 is not particularly limited, but a stretchable material such as polyester is preferable. The ear hook portion 3 may use various means other than a string or a band.

Mixture As shown in FIG. 3, the mixture 4 is contained in the storage bag 5. The mixture 4 is a composition that generates heat when it is supplied with water and comes into contact with air (oxygen). In the present disclosure, the fact that the mixture 4 generates heat means that it exhibits the desired heat generation characteristics described later and generates heat. Mixture 4 contains an oxidizable metal powder, an oxidation accelerator and a water retention agent.

The metal powder to be oxidized is not particularly limited as long as it is a metal powder that generates heat when oxidized, and examples thereof include iron powder, zinc powder, aluminum powder, magnesium powder, and copper powder, and iron powder is preferable. Will be done. The iron powder is not particularly limited, and examples thereof include reduced iron powder, cast iron powder, atomized iron powder, and electrolytic iron powder. These may be used individually by 1 type, and may be used in combination of 2 or more type.

The shape of the metal powder to be oxidized is not particularly limited, and examples thereof include powder, granular, and fibrous materials used in conventional general disposable body warmers. The average particle size of the metal powder to be oxidized is not particularly limited, but is exemplified by 0.01 μm or more and 1000 μm or less, preferably 0.1 μm or more and 500 μm or less, and more preferably 0.5 μm or more and 300 μm or less. Will be done. The average particle size can be measured by a JIS method or the like using a standard sieve. The content of the metal powder to be oxidized is not particularly limited, but the metal powder to be oxidized is 20% by mass or more and 80% by mass or less, preferably 25% by mass or more and 70% by mass or less, more preferably 30 in the mixture 4. By mass% or more and 65% by mass or less is exemplified.

The oxidation accelerator is used for the purpose of promoting the supply of oxygen to the mixture 4, especially to the oxidizable metal powder, by taking in air (oxygen). The oxidation accelerator is not particularly limited, but activated carbon, coal, charcoal, bamboo charcoal, stone ink, carbon black, graphite, acetylene black, coffee shavings and the like are exemplified, and activated carbon, carbon black, bamboo charcoal, charcoal, coffee shavings and the like are preferable. Charcoal and the like are exemplified. These may be used individually by 1 type, and may be used in combination of 2 or more type.

The shape of the oxidation accelerator is not particularly limited, and examples thereof include powdery, granular, and fibrous powders used in conventional general disposable body warmers. The average particle size of the oxidation accelerator is not particularly limited, but is exemplified by 0.001 μm or more and 1000 μm or less, preferably 0.005 μm or more and 500 μm or less, and more preferably 0.01 μm or more and 200 μm or less. .. The average particle size can be measured in the same manner as the metal powder to be oxidized. The content of the oxidation accelerator is not particularly limited, but 1% by mass or more and 30% by mass or less is exemplified, preferably 3% by mass or more and 25% by mass or less, and more preferably 5% by mass or more in the mixture 4. 23% by mass or less is exemplified.

The water retention agent is not particularly limited, and examples thereof include a porous substance and a water-absorbent resin. More specifically, natural or synthetic water-retaining agents such as vermiculite, pearlite, calcium silicate, aluminum silicate, kaolin, talc, smectite, mica, bentonite, calcium carbonate, silica gel, alumina, zeolite, silicon dioxide, and diatomaceous soil. Inorganic substances, pulp, wood flour, cotton, polyacrylate-based resin, polysulfonate-based resin, maleate anhydride-based resin, polyacrylamide-based resin, polyvinyl alcohol-based resin, polyethylene oxide-based resin, polyasparagin Examples thereof include natural or synthetic organic substances such as acid acid-based resins, polyglutamate-based resins, polyarginate-based resins, starches, and celluloses. Examples of the water retention agent are preferably vermiculite, pearlite, silica gel, diatomaceous earth, aluminum oxide, wood powder (sawdust), polyacrylate-based resin and the like. These may be used alone or in combination of two or more, but the water retention agent preferably contains a polyacrylate-based resin, and particularly contains sodium polyacrylate. preferable. The polyacrylate-based resin is not particularly limited, but preferably a polyacrylate-based resin having a water absorption rate of 10 seconds or more, and more preferably a polyacrylate-based resin having a water absorption rate of 20 seconds or more. Illustrated. Although not limited to this limitation, the above-mentioned water absorption rate is preferably 90 seconds or less, more preferably 60 seconds or less. The water absorption rate can be measured by a method based on JIS K 7224. A polyacrylate-based resin having a water absorption rate of 10 seconds or more is such that 2 g of the polyacrylate-based resin absorbs 50 g of physiological saline. Means time.

The shape of the water retention agent is not particularly limited, and examples thereof include shapes used in conventional general disposable body warmers. The average particle size of the water retention agent is not particularly limited, but is exemplified by 0.1 μm or more and 3000 μm or less, preferably 0.5 μm or more and 1000 μm or less, and more preferably 1 μm or more and 600 μm or less. The average particle size can be measured in the same manner as the metal powder to be oxidized. The content of the water retention agent is not particularly limited, but 1% by mass or more and 65% by mass or less is exemplified, preferably 5% by mass or more and 60% by mass or less, and more preferably 10% by mass or more and 60% by mass or less in the mixture 4. By mass or less is exemplified.

The mixture 4 may further contain any other component, if desired. Other components are not particularly limited, but are water-soluble salts, water, hydrogen generation inhibitors, thickeners, excipients, surfactants, metal ion blockers, fragrances, warmth components, and anti-fatigue components. , Pain-relieving component, anti-inflammatory component, blood circulation promoting component, cooling (cooling, refreshing) component, various useful components such as repellent component, and the like are exemplified. The other components may be appropriately selected and used according to the purpose, may be used alone or in combination of two or more, and the blending amount thereof may be appropriately selected.

When a useful component such as a fragrance is used as another component, the exothermic temperature of the mixture 4 (for example, from the viewpoint of more effectively exerting the useful action caused by the useful component by the heat generated in the mixture 4) is used as the useful component. A component capable of volatilizing its useful action by (about 38 ° C. to 85 ° C.) is more preferable.

Explaining the water-soluble salts among other components, the water-soluble salts are not particularly limited, but chlorides of alkali metals such as sodium and potassium, sulfide salts, and chlorides of alkaline earth metals such as calcium and magnesium. Examples thereof include product salts, sulfide salts, chloride salts and sulfide salts of metals such as iron, copper, aluminum, zinc, nickel, silver and barium. Examples of the water-soluble salts are preferably sodium chloride, potassium chloride and the like. These may be used individually by 1 type, and may be used in combination of 2 or more type.

The content of the water-soluble salt is not particularly limited, but 10% by mass or less (including zero) is exemplified, preferably 0.5% by mass or more and 7% by mass or less, more preferably 1 in the mixture 4. By mass% or more and 5% by mass or less is exemplified.

Explaining water among other components, examples of water include distilled water, tap water, ion-exchanged water, pure water, ultrapure water, and industrial water. Here, a heat generating body such as a disposable cairo containing a heat-generating composition that generates heat by contact with oxygen in the air, which has been conventionally used, contains a predetermined amount of water in the heat-generating composition and generates heat. When the sex composition comes into contact with air (oxygen), the oxidation reaction of the metal powder to be oxidized contained in the exothermic composition proceeds immediately to generate heat. In the exothermic composition, the blending amount of various materials including water is set so as to realize desired exothermic characteristics (exothermic temperature, exothermic duration, rise time, etc.). In the mixture 4 of the present embodiment, the blending amount of water is not more than a predetermined amount required for the exothermic composition to exhibit desired exothermic characteristics and generate heat, and the water content in the mixture 4 is not particularly limited. However, for example, it is 5% by mass or less (including zero).

As described above, in the present embodiment, the mixture 4 is different from the heat-generating composition that generates heat with desired heat-generating characteristics only by contacting with air (oxygen) used in conventional disposable body warmers and the like, and is a water supply tool. By absorbing a predetermined amount of water supplied from No. 6, it exhibits desired heat generation characteristics and generates heat. The amount of water (water absorption amount) absorbed by the mixture 4 in order to exhibit the desired exothermic characteristics is not particularly limited, but is preferably 10 parts by mass or more and 210 parts by mass or less per 100 parts by mass of the mixture. Is 10 parts by mass or more and 180 parts by mass or less of water, and more preferably 60 parts by mass or more and 115 parts by mass or less of water.

Here, to absorb 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture means that the mixture 4 is 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture at room temperature (about 15 ° C. to 25 ° C.). Means to absorb.

The amount of water absorbed by the mixture 4 is determined by measuring the weight (A) of the water retainer 6 holding water before contacting the storage bag 5, and measuring the weight (A) of the water retainer 6 after contacting the storage bag 5. It is calculated by measuring the weight (B) and subtracting the weight (B) from the weight (A). The ratio of 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture was obtained by subtracting the weight (B) from the weight (A) and stored in the storage bag 5 (water holder 6). It is calculated by dividing by the weight (C) of the mixture 4 (before contact with) and multiplying the value thus obtained by 100. That is, it is calculated by the following formula.

Water absorption ratio per 100 parts by mass of mixture = {weight (A) -weight (B)} x 100 / weight (C)

The mixture 4 is not particularly limited, but from the viewpoint of more efficiently exhibiting the desired heat generation characteristics, 60 seconds from the start of supplying water to the mixture 4 by contact between the storage bag 5 and the water retainer 6. In addition, it is preferable to absorb 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture.

In the present embodiment, the desired heat generation characteristics of the mixture 4 include, for example, the maximum temperature when the mixture 4 generates heat, the heat generation duration when the heat generation temperature of the mixture 4 exceeds 40 ° C., and the heat generation temperature of the mixture 4. The time required to exceed 40 ° C. (rise time) is exemplified. The heat generating characteristics of the mixture 4 are not particularly limited, but the maximum temperature is preferably 38 ° C. or higher and 85 ° C. or lower, and more preferably 40 ° C. or higher and 70 ° C. or lower. The duration of heat generation is preferably 10 minutes or longer, more preferably 30 minutes or longer. The rise time is preferably 12 minutes or less, more preferably 7 minutes or less, still more preferably 5 minutes or less from the time when water is started to be supplied to the mixture 4 by contact between the storage bag 5 and the water retainer 6. Will be done. The maximum temperature, heat generation duration and rise time are determined according to the measured values based on JIS S4100: 2007. Specifically, as described in Examples described later, these temperatures and times are set in advance by placing a temperature sensor on the surface of the storage bag 5 containing the mixture 4 opposite to the surface with which the water retainer 6 is in contact. It was affixed with tape and fixed, then the water retainer 6 was brought into contact with the storage bag 5 (the other side on which the temperature sensor was not fixed), and then the opposite side (the temperature sensor was fixed). The accommodating bag is placed on the net shelf so that the surface) faces downward, and the temperature is measured at room temperature (about 15 to 25 ° C.) to measure and determine the heat generation temperature and time. In the examples described later, a temperature sensor capable of measuring time is used, and therefore the time may be measured accordingly. Although not particularly limited, from the viewpoint of efficiently obtaining the desired heat generation characteristics, the water retainer 6 is removed 60 seconds after the start of supplying water to the mixture 4 by bringing the water retainer 6 into contact with the storage bag 5. Satisfying the above values is preferably exemplified in the bag 5.

As described above, the mixture 4 of the present embodiment exhibits desired heat generation characteristics by absorbing 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture, and as an example of such a mixture 4. Is not particularly limited, but is 20% by mass or more and 70% by mass or less for the metal powder to be oxidized, 5% by mass or more and 25% by mass or less for the oxidation accelerator, and 10% by mass or more and 35% by mass or less for the water retention agent. , 10% by mass or less (including zero) of water-soluble salts, and mixtures containing each are exemplified. More preferably, as an example of the mixture 4, the metal powder to be oxidized is 40% by mass or more and 60% by mass or less, the oxidation accelerator is 5% by mass or more and 20% by mass or less (including zero), and the water retention agent is 15% by mass or more and 35% or more. An example is a mixture containing 5% by mass or less of water-soluble salts and 5% by mass or less of each. Water may be contained in the mixture in an amount of, for example, 5% by mass or less (including zero).

The mixture 4 can be prepared by mixing an oxidizing metal powder, an oxidation accelerator, a water retention agent and a water-soluble salt, and if necessary, other components described above. The mixture 4 may be prepared in the presence of oxygen, may be produced in a vacuum or in an inert gas atmosphere, and follow the same procedure as the heat-generating composition conventionally used for disposable body warmers and the like. Can be adjusted. In particular, in the present embodiment, since the mixture 4 does not generate heat only by contacting with air (oxygen), the mixture 4 can be prepared in the presence of air (oxygen).

The amount of the mixture 4 to be contained in the storage bag 5 is not particularly limited and can be appropriately set according to the size of the storage bag 5 and the like, but preferably 4 g or more and 20 g or less is exemplified. Preferably, 8 g or more and 16 g or less are exemplified.

Storage bag As shown in FIGS. 1 to 4, the storage bag 5 for storing the mixture 4 has a bag shape having a storage space inside which can store the mixture 4. The storage bag 5 is not particularly limited, but a flat shape having a thin thickness is exemplified, and the plan view shape is a rectangular shape in the present embodiment, but is arbitrary such as a square shape, a triangular shape, a circular shape, and an elliptical shape. Can be in the shape of. The method of storing the mixture 4 in the storage bag 5 can be performed according to a conventionally known manufacturing procedure of a disposable body warmer or the like.

As described above, the mixture 4 contained in the storage bag 5 exhibits desired heat generation characteristics (maximum temperature, heat generation duration and rise time) by supplying a predetermined amount of water from the water holder 6. And generate heat. Therefore, at least a part of the storage bag 5 on the side in contact with the water retainer 6 (the side facing the wearer when the mask 1 is worn) has water permeability. Further, the mixture 4 generates heat when it comes into contact with air (oxygen). That is, the mixture 4 generates heat when a predetermined amount of water is supplied to the mixture 4 from the water retainer 6 and comes into contact with air (oxygen). Therefore, at least a part of the storage bag 5 is breathable. Therefore, the storage bag 5 has water permeability and breathability at least in a part. In the storage bag 5, the water-permeable portion may also serve as the breathable portion because it has breathability, but the breathable portion may be provided separately from the water-permeable portion. Preferably, at least a part of the storage bag 5 on the side facing the main body 2 is breathable.

The storage bag 5 includes a first sheet 50 and a second sheet 51 that form front and back surfaces, and is formed into a bag shape by joining the outer peripheral portions over the entire circumference in a state where the first sheet 50 and the second sheet 51 are overlapped. It is formed. Examples of the method of joining the two sheets 50 and 51 include methods such as adhesion, welding (heat welding, ultrasonic welding, etc.), and suturing. The heat generating region 53 of the storage bag 5 is a portion in which the mixture 4 is stored, that is, a portion inside the outer peripheral portion of the storage bag 5 (a portion where the two sheets 50 and 51 are joined).

The heat generating region 53 of the storage bag 5 is partitioned in the left-right direction by a partition portion 52. The partition portion 52 is formed in the storage bag 5 by joining two sheets 50, 51 along the vertical direction by a method such as adhesion, welding (heat welding, ultrasonic welding, etc.), suturing, or the like. Since the mixture 5 is absent or present in the partition 52 in a small amount, the storage bag 5 is easily bent at the position of the partition 52. Therefore, the storage bag 5 can be flexibly deformed according to the shape of the wearer's face when the mask 1 is worn. The partition portion 52 does not necessarily have to be formed in the storage bag 5.

Of the two sheets 50 and 51 of the storage bag 5, the first sheet 50 that comes into contact with the water retainer 6 has at least a part, preferably the entire area, water permeable. Examples of the first sheet 50 include a water-permeable resin film, a water-permeable woven fabric, a non-woven fabric, and the like.

The resin used for the resin film of the first sheet 50 is not particularly limited, and examples thereof include thermoplastic resins. The thermoplastic resin is not particularly limited, but is preferably polyethylene, polypropylene, polyester, polyamide, polyurethane, polystyrene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polycarbonate, ethylene-vinyl acetate copolymer, ethylene / vinyl alcohol. Copolymers and the like are exemplified, and more preferably polyethylene, polypropylene, ethylene vinyl acetate copolymer, ethylene / vinyl alcohol copolymer and the like are exemplified. These resins may be used alone or in combination of two or more.

The resin film of the first sheet 50 has at least a part of pores for ensuring water permeability. The size of the pores is not particularly limited as long as water can pass through the pores, but the mixture 4 can be prevented from leaking to the outside of the storage bag 5, and the shape and number of the pores are not particularly limited. Etc. are not particularly limited. Resin films having pores are conventionally known, and examples thereof include resin films having a large number of perforations and porous films. The porous film refers to a porous film having a large number of pores in which a plurality of pores are continuous. The pores may be uniformly present over the entire surface of the resin film, or may be densely present in a part thereof.

The fiber material of the woven fabric or non-woven fabric of the first sheet 50 is not particularly limited, but synthetic fibers such as nylon, vinylon, polyester, rayon, acrylic, polyethylene, polypropylene, acetate, polyvinyl chloride, polybutylene terephthalate, cotton, and the like. Natural fibers such as hemp, silk and paper, mixed fibers of synthetic fibers and natural fibers are exemplified, preferably nylon, polyester, polypropylene and the like, and more preferably nylon, polyester and the like. These fiber materials may be used alone or in combination of two or more.

The basis weight of the woven fabric or non-woven fabric of the first sheet 50 is not particularly limited as long as it can prevent water from passing through and leaking to the outside of the storage bag 5, but it is preferable. 50 g / m ² or more and 120 g / m ² or less are exemplified.

The thickness of the first sheet 50 is not particularly limited as long as it can be used as the storage bag 5, but is preferably 10 μm or more and 2000 μm or less, and more preferably 10 μm or more and 1000 μm or less.

The first sheet 50 may be composed of a water-permeable resin film or a water-permeable woven fabric or non-woven fabric alone, but the water permeability is increased in consideration of strength and durability of the mixture 4 against heat generation. It is preferable to use a resin film having a resin film. The first sheet 50 may be composed of a laminate of a water-permeable resin film and a water-permeable woven fabric or non-woven fabric.

In the laminate, a water-permeable resin film may be arranged on the mixture 4 side (inside of the storage bag 5), or a water-permeable woven fabric or non-woven fabric may be arranged. The laminated body can be formed by a laminating method as an example, and as a laminating method, a method of laminating by thermal bonding, a method of laminating with an adhesive such as a hot melt adhesive, an acrylic adhesive, or a urethane adhesive, etc. Is exemplified. The entire surface of the first sheet 50 may be the laminated body, or a part of the first sheet 50 may be the laminated body.

As described above, the mixture 4 contained in the storage bag 5 generates heat to a desired temperature when a predetermined amount of water is supplied from the water retainer 6. Therefore, the water permeability of the first sheet 50 is not particularly limited as long as the first sheet 50 has sufficient water permeability to supply a predetermined amount of water released from the water retainer 6 to the mixture 4. The water permeability of the first sheet 50 is appropriately set according to the basis weight of the woven fabric or the non-woven fabric constituting the first sheet 50 and / or the number of holes and the size of the holes of the resin film. Since the first sheet 50 has water permeability, it also has breathability.

Of the two sheets 50 and 51 of the storage bag 5, the second sheet 51 facing the main body 2 is breathable at least in part, preferably in the entire area. Similar to the first sheet 50, the second sheet 51 is a breathable resin film, a breathable woven fabric or non-woven fabric, or a laminate of the breathable resin film and the breathable woven fabric or non-woven fabric. Etc. are exemplified, and it is preferable to use a resin film in consideration of strength, durability against heat generation of the mixture 4, and the like. Examples of the resin used for the woven fabric or non-woven fabric fiber material and resin film of the second sheet 51 are the same as those exemplified in the first sheet 50 described above.

The resin film of the second sheet 51 has at least a part of pores for ensuring air permeability. The size of the pores is not particularly limited as long as air (oxygen) can pass through the pores, but the mixture 4 can be prevented from passing through and leaking to the outside of the storage bag 5. The shape, number, etc. are not particularly limited. Resin films having pores are conventionally known, and examples thereof include resin films having a large number of perforations and porous films. The pores may be uniformly present over the entire surface of the resin film, or may be densely present in a part thereof.

The basis weight of the woven fabric or non-woven fabric of the second sheet 51 is not particularly limited as long as it can prevent air (oxygen) from passing through and leaking to the outside of the storage bag 5 through the mixture 4. , Preferably 25 g / m ² or more and 70 g / m ² or less.

The thickness of the second sheet 51 is not particularly limited as long as it can be used as the storage bag 5, but is preferably 10 μm or more and 2000 μm or less, and more preferably 10 μm or more and 1000 μm or less.

As described above, the mixture 4 contained in the storage bag 5 generates heat to a desired temperature when an appropriate amount of air (oxygen) comes into contact with the mixture 4. Since the first sheet 50 of the storage bag 5 is in contact with the water retainer 6 and it is difficult to ventilate the storage bag 5, the air permeability of the second sheet 51 on the main body 2 side has a large weight with respect to the overall air permeability of the storage bag 5. Occupy. Therefore, the air permeability of the second sheet 51 is not particularly limited as long as the second sheet 51 has an air permeability such that an appropriate amount of air (oxygen) can come into contact with the mixture 4. The air permeability of the second sheet 51 is appropriately set according to the basis weight of the woven fabric or the non-woven fabric constituting the second sheet 51 and / or the number of holes and the size of the holes of the resin film. The second sheet 51 may have water permeability or may be non-water permeable.

The second sheet 51 may be non-breathable as long as an appropriate amount of air (oxygen) can be brought into contact with the mixture 4 by the first sheet 50. Here, the non-breathable property is not limited to the property of completely impermeable to air (oxygen), and for example, the resin film of the second sheet 51 has pores through which air (oxygen) can pass. It means that there is no such thing, and even if the resin film itself is slightly ventilated, it is included in non-breathable.

The storage bag 5 is attached to the main body 2 by joining the second sheet 51 to the main body 2 by a method such as adhesion, welding (heat welding, ultrasonic welding, etc.), suturing, or the like. The storage bag 5 is not particularly limited, but it is preferable that only the upper edge of the outer peripheral portion to which the first sheet 50 and the second sheet 51 are joined is joined to the main body portion 2. As a result, the storage bag 5 does not interfere when the main body 2 is extended in the vertical direction by expanding the pleats 24, and the storage bag 5 is not restrained by the main body 2 and water is caused by the weight of the water holder 6. It becomes easier to bring the holder 6 closer to the wearer's face. Therefore, the warm steam emitted from the water retainer 6 can be efficiently supplied to the wearer's nose and mouth.

The storage bag 5 is provided with a pocket 7 on the first sheet 50 on the side in contact with the water holder 6 so as to form a space in which the water holder 6 can be stored between the first sheet 50 and the first sheet 50. The pocket 7 is made of a breathable sheet. Moisture permeability is a property that allows vapor to pass through.

The pocket 7 is breathable at least in part, preferably in its entirety. Similar to the first sheet 50, the pocket 7 includes a moisture-permeable resin film, a moisture-permeable woven fabric or non-woven fabric, a laminate of the moisture-permeable resin film and the moisture-permeable woven fabric or non-woven fabric, and the like. Illustrated, it is preferable to use a woven fabric or a non-woven fabric in consideration of the touch so that the woven fabric or the non-woven fabric hits the wearer's face. Examples of the resin used for the fiber material and the resin film of the woven fabric or the non-woven fabric of the pocket 7 are the same as those exemplified in the first sheet 50 described above.

The resin film of the pocket 7 has at least a part of pores for ensuring moisture permeability. The size of the pores is not particularly limited as long as steam can pass through them, and the shape and number of the pores are not particularly limited. Resin films having pores are conventionally known, and examples thereof include resin films having a large number of perforations and porous films. The pores may be uniformly present over the entire surface of the resin film, or may be densely present in a part thereof.

The basis weight of the woven fabric or non-woven fabric of the pocket 7 is not particularly limited as long as steam can pass therethrough, but it is preferably 10 g / m ² or more and 100 g / m ² or less.

The thickness of the pocket 7 is not particularly limited, but is preferably 10 μm or more and 2000 μm or less, and more preferably 10 μm or more and 1000 μm or less.

The moisture permeability of the pocket 7 is not particularly limited as long as the warm steam emitted from the water retainer 6 can pass through. The moisture permeability of the pocket 7 is appropriately set according to the basis weight of the woven fabric or the non-woven fabric constituting the pocket 7 and / or the number of holes and the size of the holes of the resin film. The pocket 7 may be breathable.

The pocket 7 is attached to the first sheet 50 by bonding, welding (heat welding, ultrasonic welding, etc.), suturing, or the like to at least a part of the first sheet 50 of the storage bag 5. The pocket 7 is joined to the first sheet 50 so that an opening 70 to the storage space with the first sheet 50 is formed. The opening 70 is a portion for inserting the water retainer 6 in the space between the pocket 7 and the first sheet 50, and the water retainer 6 is stored in the pocket 7 from the opening 70 to retain water by the pocket 7. The water holder 6 can be brought into contact with the storage bag 5 while holding the tool 6.

The shape and size of the pocket 7 are not particularly limited as long as the water retainer 6 can be stored inside, but it is preferable that the pocket 7 has the same shape and size as the storage bag 5. The pocket 7 is not particularly limited, but is joined to the outer peripheral portion of the storage bag 5 to which the first sheet 50 and the second sheet 51 are joined so that the outer peripheral portion of the pocket 7 leaves an opening 70. , It is preferable that it is attached to the storage bag 5. In the present embodiment, the outer peripheral portion of the pocket 7 excluding the upper edge is joined to the storage bag 5. The width of the joint between the pocket 7 and the storage bag 6 is not particularly limited, but is preferably the same as or smaller than the width of the joint between the two sheets 50 and 51 of the storage bag 5. The size of the opening 70 is not particularly limited as long as the water retainer 6 can be put in the pocket 7.

Water retainer As shown in FIGS. 1 to 3, the water retainer 6 is capable of retaining water, and the mixture 4 is formed by contacting the storage bag 5 containing the mixture 4 and discharging the water. While supplying water, hot steam is generated by being heated with the heat generation of the mixture 4 to which the water is supplied, and the hot steam is supplied to the wearer of the mask 1. The water retainer 6 may be in a state of retaining water in advance, and initially does not retain water, but when water is supplied to the mixture 4, that is, the water retainer 6 is brought into contact with the storage bag 5. It suffices to retain water at the time.

The water retainer 6 is not particularly limited, but has a sheet shape having a predetermined thickness, and is not particularly limited, but preferably the plan view shape is substantially the same as the shape of the storage bag 5, and both shapes are Corresponds to each other. That is, the plan view shape of the water holder 6 is rectangular in the present embodiment, but if the plan view shape of the storage bag 5 is, for example, square, the water holder 6 is also square, and the storage bag 5 has a square shape. If the plan view shape is, for example, a circular shape or an elliptical shape, the water holder 6 is also a circular shape or an elliptical shape. The "almost the same shape" does not have to be exactly the same shape, and means that a slight difference in shape such as whether or not the corners are chamfered is allowed.

The water retainer 6 is not particularly limited, but is preferably substantially the same size as the heat generating region 53 of the storage bag 5, and the outer edge contour of the heat generating region 53 of the storage bag 5 is larger than the outer edge contour of the water holder 6. Does not stick out. In addition, "almost the same" means that the water retainer 6 and the heat generating region 53 of the storage bag 5 have exactly the same size, and that one of them is slightly larger than the other.

Since the water holder 6 and the heat generating region 53 of the storage bag 5 have the same shape and the same size, water can be uniformly discharged from the water holder 6 to the entire mixture 4 housed in the storage bag 5. , Almost no water is released other than the mixture 4. Moreover, since the heat generating region 53 of the storage bag 5 is almost completely covered by the water retainer 6, it is possible to reliably prevent the heat generating region 53 of the storage bag 5 from touching the wearer's face when the mask 1 is worn. Further, since the entire area of the water retainer 6 is uniformly heated by the mixture 4 of the storage bag 5, the water held in the water retainer 6 is easily warmed, and hot steam is efficiently generated from the water retainer 6. be able to.

The water retainer 6 does not necessarily have to have the same shape and size as the heat generation region 53 of the storage bag 5 and is used in contact with the entire heat generation region 53. It may have a different shape and / or size and may be used in contact with a part of the heat generating region 53.

The size of the water retainer 6 is not particularly limited, but is preferably 4 cm or more and 14 cm or less in the horizontal direction, 2 cm or more and 10 cm or less in the vertical direction, and more preferably 7 cm or more and 11 cm or less in the horizontal direction and 3 cm in the vertical direction. 6 cm or less is exemplified. In terms of area, preferably 8 cm ² or more and 98 cm ² or less is exemplified, and more preferably 25 cm ² or more and 55 cm ² or less is exemplified.

The thickness of the water retainer 6 is not particularly limited, but is preferably 0.5 mm or more and 5 mm or less, and more preferably 2 mm or more and 4 mm or less.

Although not shown, the water retainer 6 may have a notch extending in the vertical direction at a central position in the horizontal direction. As a result, the water retainer 6 is easily bent at the position of the notch. Therefore, the water retainer 6 can be flexibly deformed according to the shape of the wearer's face when the mask 1 is worn. Further, when the water retainer 6 overlaps the wearer's mouth when the mask 1 is worn, the notch functions as a vent, so that the water retainer 6 suppresses the wearer's mouth from interfering with breathing and wears the mask 1. It becomes easier to call by the person's mouth. The notch may be formed so as to extend vertically in a part between the upper edge and the lower edge of the water retainer 6, or extend upward from the lower edge of the water retainer 6. It may be formed so as to extend downward from the upper edge of the water retainer 6, or it may extend downward and upward from the upper edge and the lower edge of the water retainer 6, respectively. It may be formed in. As the ventilation holes, instead of the notches, a plurality of small-diameter holes may be formed in a part or the entire area of the water holder 6.

The water retainer 6 can hold water and discharge water to the accommodating bag 5 in contact with the water to supply the mixture 4 in the accommodating bag 5, and moreover, the mixture 4 in the accommodating bag 5 in contact with the water retainer 6. The material is not particularly limited as long as the water to be retained is heated as the heat is generated.

The water retainer 6 can be formed of, for example, a woven fabric or a non-woven fabric using various fiber materials, preferably a blended fiber of hydrophilic fibers, hydrophilic fibers and synthetic fibers. The fiber material is not particularly limited, but polyethylene, polypropylene, polyester, rayon, cotton, pulp and the like are preferably exemplified, and pulp is preferably exemplified from the viewpoint of flexibility and water retention. The method for producing the water retainer 6 made of a fiber material is not particularly limited, but the air-laid method is preferably exemplified.

From the viewpoint of productivity, processability, and durability, the water retainer 6 is preferably formed by blending heat-sealing fibers such as polyethylene with pulp as a main component at a predetermined ratio. The blending ratio of the pulp and the heat-sealing fiber is not particularly limited, but is preferably 60:40 to 80:20.

The water retainer 6 is not particularly limited in its appearance as long as it can retain an amount of water to be discharged into the storage bag 5 and an amount of water that can supply a sufficient amount of steam to the wearer for a long period of time such as during sleep. , Preferably 50 g / m ² or more, and more preferably 100 g / m ² or more. On the other hand, if the basis weight is too large, the water retainer 6 becomes hard, and it becomes difficult for the water retainer 6 to be deformed to follow the shape of the wearer's face when the mask 1 is worn, which may make the wearer feel uncomfortable. There is. Therefore, the basis weight of the water retainer 6 is preferably 1000 g / m ² or less, and more preferably 600 g / m ² or less.

The water retainer 6 may have a single-layer structure or a multi-layer structure, but from the viewpoint of durability and water retention, it is preferable to have a three-layer structure in which the above-mentioned fiber material is sandwiched between a pair of non-woven fabrics. At this time, the layer sandwiched between the pair of non-woven fabrics is called the middle layer, and the layer composed of the pair of non-woven fabrics is called the double-ended layer. The non-woven fabrics on both ends may be made of the same material or different materials. Examples of the material of the non-woven fabric for both ends are hydrophilic fibers, hydrophobic fibers, synthetic fibers, or blended fibers of hydrophilic fibers and synthetic fibers, and the hydrophilic fibers are not particularly limited, but are preferably rayon. Cotton is exemplified, and more preferably rayon is exemplified. If one side of both end layers is made hydrophilic, there is an advantage that moisture is easily absorbed by the pulp during production, which facilitates production. The hydrophobic fiber is not particularly limited, but preferably polyester such as polyethylene, polypropylene and polyethylene terephthalate is exemplified, and more preferably polyethylene and polypropylene are exemplified. Making the other side of both end layers hydrophobic has the advantage of preventing wetting and stickiness. Therefore, it is preferable that the side of both end layers facing the wearer side is composed of hydrophobic fibers, and the opposite side is composed of hydrophilic fibers such as rayon. The basis weight of the non-woven fabric on both ends is not particularly limited, but is preferably 20 g / m ² or more and 50 g / m ² or less.

The water retainer 6 can be formed of a porous body such as a sponge, in addition to the woven cloth or the non-woven fabric. The porous body has a structure in which spaces such as small holes, cracks, and voids are continuously provided, and water is retained in the spaces. The sponge is not particularly limited, but is a synthetic sponge whose main raw material is a synthetic resin material such as urethane resin or melamine resin, a natural sponge whose main raw material is a natural material such as sponge or cellulose, a synthetic rubber, or a rubber such as a natural rubber. Various sponges such as rubber sponges whose main raw material is a material are exemplified.

The water retainer 6 is not particularly limited, but is preferably compressible and deformable by the action of an external force. That is, it is preferable that the water retainer 6 discharges water by pushing the water to be retained to the outside by compression deformation. The water retainer 6 may be one that discharges water by naturally exuding the water to be retained to the outside, but the water retainer 6 is configured to discharge water by compression deformation. Can be released with high certainty. Further, it is more preferable that the water retainer 6 has the flexibility to be easily compressed and deformed. As a result, a sufficient amount of water can be discharged from the water retainer 6 to generate heat of the mixture 4 without applying a large force to the water retainer 6. The water retainer 6 that is easily compressed and deformed is not particularly limited, but a sponge such as urethane sponge and a non-woven fabric having elasticity such as "Ferivendy" (registered trademark) manufactured by Kuraray Laflex Co., Ltd. are preferably exemplified. Will be done. The water retainer 6 may be any as long as it is compressed and deformed by the action of an external force to release the water to be held, and does not necessarily have elasticity. However, when the external force is removed by having elasticity, the original It is preferable to try to return to shape. As for elasticity, the water retainer 6 that has been compressed and deformed by an external force may have a property of returning to its original shape, and does not necessarily have a property of completely returning to its original shape.

The water retainer 6 described above is not particularly limited, but it is preferable to discharge a predetermined amount of water into the storage bag 5 from the time of contact with the storage bag 5. Specifically, at room temperature (about 15 ° C. to 25 ° C.), from the time when the water retainer 6 and the storage bag 5 come into contact with each other, per 100 parts by mass of the mixture in the storage bag 5, preferably 10 parts by mass or more and 210 parts by mass. Hereinafter, it is preferable to discharge water of 10 parts by mass or more and 180 parts by mass, more preferably 60 parts by mass or more and 115 parts by mass or less into the storage bag 5. Further, the water retainer 6 is not particularly limited, but it is preferable to discharge the above-mentioned amount of water into the storage bag 5 within 60 seconds from the time of contact with the storage bag 5. The mixture 4 in the storage bag 5 needs to be supplied with a predetermined amount of water in order to satisfy the desired heat generation characteristics at the time of heat generation, and the supply amount of water greatly affects the heat generation characteristics. That is, the mixture 4 is unlikely to generate heat regardless of whether the amount of water supplied is too large or too small. Further, even if the amount of water supplied is the same, if the supply speed is too fast or too slow, it is difficult for the mixture 4 to generate heat efficiently. Therefore, the water retainer 6 is not particularly limited, but is brought into contact with the storage bag 5. It is preferable to discharge the above-mentioned amount of water into the storage bag 5 from time to 60 seconds. Therefore, in the present embodiment, the mixture 4 is discharged from 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture within 60 seconds from the time when the water holder 6 comes into contact with the storage bag 5. Is satisfactorily generated, and the mixture 4 is configured to efficiently exhibit the desired heat generation characteristics at the time of heat generation.

The method of discharging water from the water holder 6 to the storage bag 5 is not particularly limited, but the water holder 6 is preferably pressurized for 60 seconds from the time when the water holder 6 and the storage bag 5 are brought into contact with each other for compression deformation. It is preferable to discharge the water held by the water retainer 6 from the water retainer 6 to discharge the water of 10 parts by mass or more and 210 parts by mass or less per 100 parts by mass of the mixture in the storage bag 5 into the storage bag 5. .. As a result, the mixture 4 in the storage bag 5 can be reliably supplied with a predetermined amount of water from the water retainer 6 within a predetermined time. The force applied to the water retainer 6 is not particularly limited, but is preferably a force that allows the wearer or the like to comfortably press the water retainer 6 with a human hand, and 1800 Pa or more is exemplified, more preferably 1800 Pa. More than 6500 Pa or less is exemplified. Here, when the water retainer 6 has the flexibility of being easily compressed and deformed like the above-mentioned sponge or elastic non-woven fabric, the force applied to the water retainer 6 may be relatively small. For example, about 1800 Pa to 3000 Pa is exemplified. On the other hand, when the water retainer 6 is hard to be compressed and deformed like a normal non-woven fabric, the force applied to the water retainer 6 needs to be relatively large, and for example, about 4000 Pa to 6500 Pa is exemplified. NS. In this way, water is retained according to the flexibility of the water retainer 6 so that water of 10 parts by mass or more and 210 parts by mass or less per 100 parts by mass of the mixture in the storage bag 5 is discharged to the storage bag 5 in 60 seconds. The force when pressurizing the tool 6 is adjusted.

In addition to the method described above, the method of discharging water from the water holder 6 to the storage bag 5 is to use water held by the water holder 6 from the time when the water holder 6 and the storage bag 5 are brought into contact with each other. Water of 10 parts by mass or more and 210 parts by mass or less per 100 parts by mass of the mixture in the storage bag 5 may be discharged to the storage bag 5 by naturally exuding from the holder 6.

The amount of water discharged from the water holder 6 to the storage bag 5 is determined by measuring the weight (A) of the water holder 6 holding the water before contacting the storage bag 5, and also contacting the storage bag 5. The weight (B) of the water retainer 6 after the water retainer 6 is measured, and the weight (B) is subtracted from the weight (A) to calculate the weight (B). Further, as for the ratio of 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture in the storage bag 5, the value obtained by subtracting the weight (B) from the weight (A) is stored in the storage bag 5. It is calculated by dividing by the weight (C) of the mixture 4 (before contact with the water retainer 6) and multiplying the value thus obtained by 100. That is, it is calculated by the following formula.

Release rate per 100 parts by mass of mixture = {weight (A) -weight (B)} x 100 / weight (C)

The amount of water held in the water retainer 6 (water retention amount) is such that a predetermined amount of water can be discharged to the storage bag 5 and sufficient steam can be supplied to the wearer for a long period of time such as during sleep. Although not particularly limited, 6 g or more is exemplified, and 8 g or more is more preferably exemplified. Further, from the viewpoint of the influence of the weight of the water retainer 6 on the usability when the mask 1 is attached, the amount of water retained is preferably 20 g or less, more preferably 16 g or less.

Other components may be added to the water held in the water retainer 6. The other component is not particularly limited, but salt can be exemplified. The water containing salt is not particularly limited, but preferably 0.1% by mass or more and 10% by mass or less of salt solution is exemplified. By adding salt to water, the heat generation of the mixture 4 can be efficiently performed.

Moreover, polyol can be exemplified as another component added to water. The polyol is not particularly limited, but glycerin, dipropylene glycol, 1,3-butylene glycol, propylene glycol, sorbitol, 1,2pentanediol, 1,2-hexanediol and the like are exemplified, and more preferably safe. Glycerin is exemplified in terms of sex. In addition to these, preservatives such as methylparaben and phenoxyethanol, moisturizers such as hypromellose and betaine, plant extracts, xanthan gum and hydroxypropylmethylcellulose (HPMC), hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC), agar , Water-soluble thickeners such as guar gum and carrageenan, fragrances such as eucalyptus and mint, and surfactants (nonionic surfactants, amphoteric surfactants, anionic surfactants) that solubilize fragrances, etc. are appropriately added. be able to.

Before storing the water holder 6 in the pocket 7, it is preferable to store it in a bag made of an impermeable aluminum laminated film, an aluminum-deposited PET film, a transparent (silica) -deposited PET film, or the like.

In order to use the mask 1 of the present embodiment described above, first, the water retainer 6 is stored in the pocket 7 and the water retainer 6 is brought into contact with the storage bag 5. Then, the wearer presses the water retainer 6 toward the storage bag 5 with, for example, the palm of his hand. The water retainer 6 is preferably pressurized at 1800 Pa or more for 60 seconds from the time of contact with the storage bag 5, so that a predetermined amount of water, specifically 10 parts by mass per 100 parts by mass of the mixture in the storage bag 5, is obtained. Water of 210 parts by mass or less is discharged to the mixture 4 of the storage bag 5. As a result, the mixture 4 in the storage bag 5 generates heat when a predetermined amount of water is supplied. In this state, the wearer wears the mask 1 on his face. When the mask 1 is attached, the water retainer 6 that holds the water continues to be heated by the heat generated by the mixture 4 in the storage bag 5, so that warm steam is generated from the water retainer 6 for a long time. This warm steam passes through the pocket 7 and is sucked from the wearer's mouth and nose in the main body 2, thereby obtaining effects such as alleviating the dry feeling of the pharynx and nose and moisturizing the mucous membranes of the throat and nose. be able to.

According to the mask 1 of the present embodiment described above, the water retainer 6 is arranged closer to the wearer than the storage bag 5, that is, the storage bag 5 containing the heat-generating mixture 4 and the wearer's face. Since the water retainer 6 is interposed between the two, it is possible to prevent the mixture 4 in the storage bag 5 from directly hitting the wearer's face when the mask 1 is worn. Therefore, it is possible to reduce the risk that the storage bag 5 keeps hitting the wearer's face when the mask 1 is worn and the face is burned at a low temperature or feels uncomfortable.

In addition, the mixture 4 in the storage bag 5 does not contain in advance a sufficient amount of water necessary for the oxidation reaction of the metal to be oxidized, which is an exothermic reaction. Therefore, it is possible to reduce the risk that the oxidation reaction of the metal to be oxidized contained in the mixture 4 proceeds before use due to the intrusion of air (oxygen) into the storage bag 5 during the production of the mask 1 and the storage of inventory. Therefore, when the mixture 4 exhibits desired heat generation characteristics during use, the water retainer 6 can be satisfactorily heated, and a sufficient amount of warm steam can be supplied to the wearer.

Further, according to the mask 1 of the present embodiment described above, the water retainer 6 releases 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture, preferably within 60 seconds from the time of contact with the storage bag 5. It is configured to do so. As a result, the mixture 4 in the storage bag 5 receives a predetermined amount of water that can achieve the desired heat generation characteristics, so that the mixture 4 can be satisfactorily heated.

Further, according to the mask 1 of the present embodiment described above, the water retainer 6 is configured to discharge water by compression deformation. As a result, a predetermined amount of water can be discharged from the water retainer 6 to the mixture 4 in the storage bag 5 with high certainty.

Further, according to the mask 1 of the present embodiment described above, the water retainer 6 is pressurized at 1800 Pa or more, preferably for 60 seconds from the time of contact with the storage bag 5, so that 100 mass of the mixture in the storage bag 5 is massed. It is configured to discharge 10 parts by mass or more and 210 parts by mass or less of water per unit. As a result, the wearer or the like can comfortably press the water retainer 6 by hand, whereby a predetermined amount of water can be reliably applied from the water retainer 6 to the mixture 4 in the storage bag 5. Can be released.

Further, according to the mask 1 of the present embodiment described above, the mixture 4 absorbs 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture, preferably within 60 seconds from the time of contact with the water retainer 6. It is configured as. As a result, the mixture 4 in the storage bag 5 can absorb a predetermined amount of water capable of exhibiting the desired heat generation characteristics, so that the mixture 4 can be satisfactorily generated to generate heat.

Further, according to the mask 1 of the present embodiment described above, the water content of the mixture 4 is 5% by mass or less. As a result, the mixture 4 can prevent the oxidation reaction of the metal to be oxidized, which is an exothermic reaction, from proceeding with high certainty before use.

Further, according to the mask 1 of the present embodiment described above, the water-retaining agent contained in the mixture 4 contains a polyacrylate-based resin having a water absorption rate of 10 seconds or more. As a result, the mixture 4 retains a large amount of water while the water permeates into the inside thereof, so that the duration of heat generation can be maintained for a long time.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

In the above embodiment, the storage bag 5 is provided with a pocket 7 for contacting the storage bag 5 while storing the water holder 6. The means for bringing the water holder 6 into contact with the storage bag 5 is not limited to the pocket 7 attached to the storage bag 5, and for example, as shown in FIG. 5, a bag-shaped storage unit attached to the main body 2 9 can be used.

The storage portion 9 is composed of, for example, two sheets, and the portions of the outer peripheral portions of the two sheets excluding the upper edge are joined to each other by a method such as adhesion, welding (heat welding, ultrasonic welding, etc.), stitching, or the like. As a result, the storage portion 9 is formed in a bag shape in which the upper portion is opened and the storage bag 5 and the water holder 6 can be inserted and held between the two sheets. In addition, one sheet is folded, and the portion of the outer peripheral portion excluding the upper edge is bonded to each other by a method such as adhesion, welding (heat welding, ultrasonic welding, etc.), suturing, etc. to form an opening 90 at the upper part. A bag-shaped storage portion 9 may be formed. In the embodiment of FIG. 5, by storing the water holder 6 together with the storage bag 5 in the storage portion 9, the water holder 6 can be held while being in contact with the storage bag 5. In the storage unit 9, the storage bag 5 is stored on the main body 2 side, and the water retainer 6 is stored on the side opposite to the main body 2 (the face side of the wearer when the mask 1 is worn). The surface of the storage portion 9 on the main body 2 side has breathability, and the surface on the side opposite to the main body 2 (the face side of the wearer when the mask 1 is worn) has moisture permeability (or breathability). ing.

Although not shown, in the embodiment of FIG. 5, only the water retainer 6 is stored in the storage portion 9, an adhesive layer is provided on one surface of the storage bag 5, and the storage bag 5 is provided with the adhesive layer. The water retainer 6 may be brought into contact with the storage bag 5 by sandwiching a part of the storage portion 9 by attaching the water retainer 6 to the surface of the storage portion 9 on the main body 2 side.

Further, in the above embodiment, the water retainer 6 is configured to discharge 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture in 60 seconds from the time of contact with the storage bag 5. The amount of water released from the holder 6 is not particularly limited.

Further, in the above embodiment, the mixture 4 is configured to absorb 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture from the time when the storage bag 5 and the water holder 6 come into contact with each other. The amount of water absorbed in 4 is not particularly limited.

Further, in the above embodiment, the mixture 4 has a water content of 5% by mass or less, but if the mixture 4 does not exhibit the desired heat generation characteristics without the supply of water, the mixture 4 is included. The water content is not particularly limited.

Further, in the above embodiment, the mixture 4 contains a polyacrylate-based resin having a water absorption rate of 10 seconds or more, but the water absorption rate of the polyacrylate-based resin is not particularly limited.

Further, in the above embodiment, the upper edge 20, the lower edge 21, and the left and right side edges 22 and 23 of the main body 2 are formed in a straight line, but for example, the upper edge 20 is a bending line that is convex toward the upper side. Alternatively, it may be formed in a curved line, and / or the lower edge 21 may be formed in a curved or curved line that is convex downward, and / or the left and right side edges 22, 23 may be formed in a curved line or a curved line that is convex toward the inside.

Further, in the above embodiment, the main body 2 has a rectangular shape in a plan view, but may have various shapes such as a triangular shape, a square shape, another polygonal shape, a circular shape, and an elliptical shape.

Further, in the above embodiment, the main body 2 has a structure that can be extended in the vertical direction by the pleats 24, but the means for making the main body 2 extend in the vertical direction is not limited to the pleats 24. Various means can be used. For example, by forming gathers on the main body 2, the main body 2 may have a structure that can be extended in the vertical direction. The means and structure for extending the main body 2 such as the pleats 24 may not be provided on the main body 2.

Further, in the above embodiment, the main body 2 is a flat type, but it may be a three-dimensional type. In the three-dimensional type, the side edges of the two mask pieces are joined by heat fusion or the like, and when not in use, the two mask pieces are folded by a folding portion extending in the vertical direction to the center in the horizontal direction. Even if the two mask pieces are unfolded, they do not become flat, and when the mask 1 is attached, a large space is formed between the main body 2 and the face under the nose (nostrils) and the mouth. In the flat type, when the mask 1 is attached, the main body 2 sticks to the surface of the face without leaving a gap as compared with the three-dimensional type.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to the following examples.

[Test Example 1]
Preparation of Mixture According to the composition shown in Table 1, the metal powder to be oxidized, the oxidation accelerator, the water retention agent, and the water-soluble salts are mixed, and the mixture (Examples 1 to 8, Comparative Example 1 and Comparative Example 2) is prepared. Prepared. In Table 1, the unit of the content of the mixture is mass%. In addition, each component is as follows.

-Oxidable metal powder: Iron powder (trade name Atmel 80AF-2, manufactured by Kobe Steel, Ltd.)
-Oxidation accelerator: activated carbon, synthetic aluminum silicate (trade name: Kyoward 700, manufactured by Kyowa Chemical Industry Co., Ltd.)
-Water retention agent: Sodium polyacrylate (trade name: Sunfresh K31, manufactured by Sanyo Kasei Kogyo Co., Ltd., water absorption rate: 35 seconds), crystalline cellulose 1 (trade name: Compressel S 101, manufactured by Fushimi Pharmaceutical Co., Ltd.), crystalline cellulose 2 (commodity) Name Theoras KG-802, manufactured by Asahi Kasei Co., Ltd.)
-Water-soluble salts: Sodium chloride (trade name TF-100, manufactured by Salt Kansai Co., Ltd.)

12 g of the mixture obtained for each of the Examples and Comparative Examples was stored in a water-permeable storage bag (size 50 mm × 80 mm) and sealed to obtain a storage bag containing the mixture. Since the mixture does not generate heat when it comes into contact with air, it was left as it was without being stored in a non-breathable bag until it came into contact with a water retainer described later.

Preparation of water retainer As the water retainer, a non-woven fabric having a size of 60 mm × 90 mm (trade name: Ferivendy 150 g / m ² , manufactured by Kuraray Laflex Co., Ltd., ethylene-vinyl alcohol copolymer, steam jet manufacturing method) was used. Specifically, in Examples 1 to 6 and Comparative Example 1 and Comparative Example 2, one piece of the non-woven fabric was used as a water retainer, and in Examples 7 and 8, the non-woven fabric was used as a water retainer. Was used as a stack of two sheets.

The amount of water absorbed by each water retainer was 2 g in Example 1, 4 g in Example 2, 10 g in Example 3, 11 g in Example 4, 14 g in Example 5, and 20 g in Example 6. Example 7 weighs 22 g, Example 8 weighs 25 g, Comparative Example 1 weighs 0.5 g, and Comparative Example 2 weighs 1 g.

Water supply from the water retainer to the mixture Water supply from the water retainer to the mixture was performed as follows. The above-mentioned water-absorbing water retainer is placed on one side (water-permeable surface) of the storage bag containing the above-mentioned mixture and brought into contact with the water-retaining device, and immediately applied with a load of 3.6 kg (about 6500 Pa) and allowed to stand for 1 minute. did. The amount of water absorbed by the mixture by the contact is determined by measuring the weight of the water retainer that has absorbed water immediately before the contact (weight before contact), and as described above, the weight of the water retainer after standing for 1 minute. (Weight after contact) was measured, the weight after contact was subtracted from the weight before contact, and the obtained value was taken as the water absorption amount of the mixture. In this test example, it was not observed that the released water leaked from the storage bag or the like, that is, all the released water was absorbed by the mixture in the storage bag.

Evaluation of fever The fever was evaluated according to the following procedure. First, the temperature sensor is attached to the surface of the accommodating bag containing the mixture on the side opposite to the surface with which the water retainer is in contact with tape in advance to fix the temperature sensor, and then the accommodating bag (fixing the temperature sensor). The water retainer is brought into contact with the other side (the other side), and then the storage bag is placed on the net shelf so that the opposite side (the side on which the temperature sensor is fixed) faces downward, and the room temperature (about 15) is reached. The exothermic temperature and time were measured by measuring the temperature at (° C. to 25 ° C.). At this time, data was recorded at 5-second intervals using the temperature sensor. Further, as described above, after applying a load and allowing it to stand for 1 minute, the water retainer was removed from the storage bag. Next, based on the heat generation temperature and time measured in this way, the maximum temperature at the time of heat generation (maximum temperature within 3 hours from the time when the load is applied), the duration of the heat generation temperature exceeding 40 ° C. (heat generation duration), The time required for the heat generation temperature to exceed 40 ° C. (rise time) was evaluated. Specifically, the maximum temperature was defined as "◯" when the temperature exceeded 40 ° C, "Δ" when the temperature exceeded 30 ° C at 40 ° C or lower, and "x" when the temperature was 30 ° C or lower. The heat generation duration is "○" when the heat generation temperature exceeds 40 ° C and lasts for 30 minutes or more, "△" when the heat generation temperature is less than 30 minutes and 10 minutes or more, and "×" when the heat generation temperature is less than 10 minutes. did. The rise time is "○" when the time required for the heat generation temperature to exceed 40 ° C. after the contact is 7 minutes or less, "△" when it is more than 7 minutes and 12 minutes or less, and more than 12 minutes. The case was set to "x".

Results The results are shown in Table 1.

As is clear from Table 1, in Comparative Example 1 and Comparative Example 2 in which the water absorption ratio per 100 parts by weight of the mixture is small, the maximum temperature at the time of heat generation does not exceed 40 ° C., and the desired heat generation duration (10 minutes or more). ) And the rise time (12 minutes or less) were not observed. On the other hand, in Examples 1 to 8 in which the water absorption ratio per 100 parts by weight of the mixture was increased, a good maximum temperature exceeding 40 ° C. was achieved at the time of heat generation, and a desired heat generation duration (10 minutes) was achieved. (Above) and rise time (12 minutes or less) were observed. From this, it was confirmed that the mixture obtained good heat generation characteristics according to Examples 1 to 8. From this, it was confirmed that good heat generation characteristics can be obtained even when the water retainer is brought into contact with the storage bag during use to allow the mixture in the storage bag to absorb water.

[Test Example 2]
Preparation of Mixture A mixture (Example 9 and Example 10, Comparative Example 3) was prepared by mixing an oxidizing metal powder, an oxidation accelerator, a water retaining agent, and a water-soluble salt according to the composition shown in Table 2. In Table 2, the unit of the content of the mixture is mass%. The same components as in Test Example 1 were used.

11 g of the mixture obtained for each of the Examples and Comparative Examples was stored in a water-permeable storage bag (size 50 mm × 80 mm) and sealed to obtain a storage bag containing the mixture. Since the mixture does not generate heat even when it comes into contact with air, it was left as it was without being stored in a non-breathable bag until it came into contact with a water-containing material described later.

Preparation of water retainer As for the water retainer, Example 9 and Example 10 are the same non-woven fabric as Test Example 1 (trade name: Ferivendi 150 g / m ² , manufactured by Kuraray Laflex Co., Ltd., ethylene-vinyl alcohol copolymer, steam jet). As for the manufacturing method), in Comparative Example 3, a non-woven fabric (trade name HP-55, manufactured by Japan Vilene Co., Ltd., needle punch manufacturing method) was used, and water was absorbed in the same manner. The amount of water absorbed by each water holder is 11 g.

Water supply from the water retainer to the mixture Water supply from the water retainer to the mixture was carried out in the same manner as in Test Example 1. In Example 9, a load of 1 kg (about 1800 Pa) was applied and the mixture was allowed to stand for 1 minute, and in Example 10, a load of 3.6 kg (about 6500 Pa) was applied and the mixture was allowed to stand for 1 minute. In Comparative Example 3, a load of 1 kg (about 1800 Pa) was applied and the mixture was allowed to stand for 1 minute. The amount of water released from the water retainer is determined by measuring the weight of the water retainer that has absorbed water (weight before contact) immediately before contact, and after allowing it to stand for 1 minute as described above, the water retainer The weight (mass after contact) was measured, the weight after contact was subtracted from the weight before contact, and the obtained value was taken as the amount of water discharged from the water retainer. In this test example, it was not observed that the released water leaked from the storage bag or the like, that is, all the released water was absorbed by the mixture in the storage bag.

Heat generation evaluation After the contact, heat generation was evaluated in the same manner as in Test Example 1.

Results The results are shown in Table 2.

As is clear from Table 2, in Comparative Example 3 in which the amount of water released per 100 parts by weight of the mixture was small, the maximum temperature at the time of heat generation did not exceed 40 ° C., and the desired heat generation duration (10 minutes or more) and No rise time (12 minutes or less) was observed. On the other hand, in Examples 9 and 10 in which the amount of water released per 100 parts by weight of the mixture was increased, a good maximum temperature exceeding 40 ° C. was achieved at the time of heat generation, and a desired heat generation duration (a desired heat generation duration () 10 minutes or more) and rise time (12 minutes or less) were observed. From this, it was confirmed that according to Examples 9 and 10, a predetermined amount of water was released from the water-containing material by pressurization, and this was absorbed by the mixture to obtain good heat generation characteristics. Further, from this, it was confirmed that good heat generation characteristics can be obtained even when the water-containing material is brought into contact with the storage bag to discharge water during use and the mixture in the storage bag is made to absorb water. Was done.

[Test Example 3]
12 g of the mixture was prepared according to the composition shown in Table 3. In Table 3, the unit of the content of the mixture is mass%. The same components as in Test Example 1 were used. The obtained mixture was stored in a water-permeable storage bag (size 50 mm × 80 mm) and sealed to obtain a storage bag containing the mixture. Since the mixture does not generate heat even when it comes into contact with air, it was left as it was without being stored in a non-breathable bag until it came into contact with a water-containing material described later.

As the water retainer, the same non-woven fabric as in Test Example 1 (trade name: Ferivendy 150 g / m ² , manufactured by Kuraray Laflex Co., Ltd., ethylene-vinyl alcohol copolymer, steam jet manufacturing method) was used, and 11 g of water was absorbed. A water retainer that has absorbed the above-mentioned water is placed on one side (water-permeable surface) of the storage bag containing the above-mentioned mixture and brought into contact with the container, and a load of 3.6 kg (about 6500 Pa) is applied to the water retainer for 1 minute. Placed to initiate heat generation of the mixture. The amount of water absorbed by the mixture at the start of heat generation was 9 g.

Immediately after the start of heat generation, the storage bag and the water holder are placed on top of each other and placed on the arm so that the water holder is on the skin side, and the storage bag is brought into contact with the arm via the water holder to hold water. The temperature between the ingredient and the skin (skin surface temperature when the skin is in contact with the storage bag which is the heat source) Ts was measured. Then, based on the integrated value of the damage function Ω calculated based on the following equations (1) and (2), the time t until the integrated value exceeds 0.53 was obtained (Example 11). Similarly, using the same storage bag, the storage bag immediately after the start of heat generation is placed on the arm so that it comes into direct contact with the skin, and the temperature between the storage bag and the skin (the storage bag whose heat source is the skin). (Skin surface temperature when in contact with) Ts is measured, and based on the integrated value of the damage function Ω calculated based on the following equations (1) and (2), until the integrated value exceeds 0.53. Time t was determined (Comparative Example 4). The results are shown in Table 4. Regarding the damage function Ω, Non-Patent Document 1 (Yukio Yamada, Regarding Low Temperature Burns, “Food and Safety” No. 72 (March 1999), pp. 2-8) can be referred to.

In addition, "t" is the time when the skin is in contact with the storage bag which is a heat source (sec), Tt is the temperature at the bottom of the epidermis (° C.), and Ts is the skin surface temperature when it is in contact with the storage bag which is a heat source (t). ℃).

As is clear from Table 4, in Example 11 in which the water retainer is interposed between the storage bag and the skin, it takes a very long time for the integrated value of the damage function Ω to exceed 0.53, which is 33.8 hours. On the other hand, in Comparative Example 4 in which the storage bag was brought into direct contact with the skin, the time until the integrated value of the damage function Ω exceeded 0.53 was as short as 1.9 hours, and Example 11 was Comparative Example 4. It was confirmed that it took a sufficiently long time for a disorder called low temperature burn to occur. Therefore, according to Example 11, it was shown that it is effective in reducing the risk of low-temperature burns on the wearer's face due to the storage bag when the mask is worn.

1 Mask 2 Main body 4 Mixture 5 Storage bag 6 Water retainer 7 Pocket 9 Storage

Claims (9)

A mask worn on the wearer's face
The main body that covers a part of the wearer's face,
A storage bag containing a mixture containing an oxidizable metal powder, an oxidation accelerator and a water-retaining agent, which is supplied with water and generates heat when it comes into contact with air.
A water retainer capable of retaining water and supplying water to the mixture in contact with the storage bag.
With
The water retainer is arranged closer to the wearer than the storage bag.
The storage bag is a mask in which at least a part of the side in contact with the water retainer has water permeability. The mask according to claim 1, further comprising a pocket attached to the storage bag and in contact with the storage bag while storing the water retainer. The mask according to claim 1, further comprising a storage portion attached to the main body portion and accommodating the water holder together with the storage bag. The mask according to any one of claims 1 to 3, wherein the water retainer is configured to discharge 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture from the time of contact with the storage bag. .. The mask according to any one of claims 1 to 4, wherein the water retainer is configured to release water by compressive deformation. The heat generating tool according to claim 5, wherein the water holder is pressurized at 1800 Pa or more from the time of contact with the storage bag. The mask according to any one of claims 1 to 6, wherein the mixture is configured to absorb 10 parts by mass or more and 210 parts by mass or less of water per 100 parts by mass of the mixture from the time of contact with the water holder. The mask according to any one of claims 1 to 7, wherein the water content of the mixture is 5% by mass or less. The mask according to any one of claims 1 to 8, wherein the water retention agent contains a polyacrylate-based resin having a water absorption rate of 10 seconds or more.

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