Pre-packaged eye mask

Abstract

This invention relates to a pre-packaged eye mask that reduces the possibility of distortion or wrinkles occurring in the eye mask while it is sealed in the packaging bag, thereby improving its appearance during use. [Solution] The solution comprises an eye mask that generates heat through the oxidation reaction of an oxidizable metal, and a packaging bag capable of sealing the eye mask, wherein the inner surface area of ​​the packaging bag is 250 cm². 2 Over 470cm 2 The following conditions apply, wherein the ratio of the surface area of ​​the inner surface of the sealed packaging bag to the weight of the oxidizable metal is 300 or less.

Description

[Technical Field]

[0001] This invention relates to a pre-packaged eye mask. [Background technology]

[0002] Eye masks capable of warming the wearer's eyes have been known for some time (for example, Patent Document 1). Conventional eye masks, including the one described in Patent Document 1, provide comfort to the wearer by warming the wearer's eyes with a heating element that generates heat through an oxidation reaction. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2015-123336 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] Conventional eye masks, including the eye mask described in Patent Document 1, are distributed to the market in a sealed packaging bag that can block oxygen in order to prevent the eye mask from overheating when not in use.

[0005] However, with conventional eye masks, there is no restriction on the movement of the eye mask within the packaging bag. As a result, the eye mask may move around inside the bag due to loading into transport vehicles or vibrations during transport, potentially causing distortion or wrinkles to the eye mask body and ear loops. Therefore, conventional eye masks have room for improvement in terms of reducing distortion and wrinkles within the packaging bag and improving the aesthetic appearance of the eye mask during use.

[0006] This invention relates to a pre-packaged eye mask that reduces the possibility of distortion or wrinkles occurring in the eye mask while it is sealed in the packaging bag, thereby improving its appearance during use.

Means for Solving the Problem

[0007] The packaged eye mask according to the present invention includes an eye mask that generates heat by an oxidation reaction of a metal susceptible to oxidation, and a packaging bag capable of packaging the eye mask in a sealed state. The packaging bag is an oxygen barrier bag that can be deformed following a change in the volume of the internal gas. The area of the inner surface of the packaging bag is 250 cm or more and 470 cm 2 or less, and the ratio of the area of the inner surface in the sealed state of the packaging bag to the weight of the metal susceptible to oxidation is 300 or less.

Advantages of the Invention

[0008] According to the packaged eye mask of the present invention, it is possible to reduce the possibility of distortion, kink, etc. occurring in the eye mask in the state of being enclosed in the packaging bag, and to improve the aesthetics during use.

Brief Description of the Drawings

[0009] [Figure 1] It is a schematic view showing the packaged eye mask according to the present embodiment. [Figure 2] It is a plan view showing the eye mask according to the present embodiment. [Figure 3] It is a plan view showing a covering portion in the eye mask according to the present embodiment. [Figure 4] It is an exploded perspective view showing the eye mask according to the present embodiment. [Figure 5] It is a schematic cross-sectional view showing the eye mask according to the present embodiment. [Figure 6] It is a perspective view showing a human head model. [Figure 7] It is a plan view showing a heating element according to the present embodiment. [Figure 8] It is a schematic cross-sectional view taken along line A-A' of FIG. 7. [Figure 9] It is a schematic diagram showing a measuring device for measuring the amount of water vapor generated. [Figure 10]Figure 10(a) shows the process of putting on the eye mask according to this embodiment, and Figure 10(b) shows the state of wearing the eye mask according to this embodiment. [Modes for carrying out the invention]

[0010] Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. Note that the following embodiments are not intended to limit the invention as defined in each claim, and not all combinations of features described in the embodiments are necessarily essential to the solution of the invention. Furthermore, in these embodiments, the scale and dimensions of each component may be exaggerated, and some components may be omitted.

[0011] [Overall contents of the pre-packaged eye mask] As shown in Figure 1, the packaged eye mask 200 according to this embodiment comprises an eye mask 1 that generates heat due to the oxidation reaction of an oxidizable metal, and a packaging bag 100 that can seal the eye mask 1.

[0012] In this embodiment, the packaged eye mask 200 is described as having only one eye mask 1 packaged in one packaging bag 100, but it is not limited to this, and it may be configured so that multiple eye masks 1 are packaged in one packaging bag 100.

[0013] [Overall components of the eye mask] As shown in Figures 2 to 5, the eye mask 1 according to this embodiment comprises a main body 10 that can be attached to the wearer's face, and a pair of heating elements 40 provided on the main body 10.

[0014] In this specification, in a plan view of the eye mask 1 (see Figure 2), the direction in which the upper edge portion 11, described later, is located is defined as "upward," and the direction in which the lower edge portion 12, described later, is located is defined as "downward." Furthermore, in this specification, in a plan view of the eye mask 1, the direction perpendicular to the vertical direction, that is, the direction that coincides with the direction in which the heating elements 40 are arranged, is defined as the "width direction."

[0015] In this specification, the area located inside the orbit, such as the eyeball, eyelids, and eyelashes, is collectively defined as "eye." In this specification, the eyebrows, the space between the eyebrows, and the upper edges of the cheeks are collectively defined as "area around the eye." Furthermore, in this specification, the area corresponding to (1) or (2) below is defined as "temple." (1) The indented area of ​​the skull located between the outer corner of the eyebrow and the upper end of the base of the ear. (2) As shown in Figure 6, within the region of a circle with a radius of 10 mm centered at a point 15 mm towards the head from the intersection point P of the first imaginary line VL1, which connects the outer corner of the eye and the upper end of the base of the ear of the human head model HM, and the second imaginary line VL2, which extends vertically through a point 30 mm from the outer corner end of the first imaginary line VL1. The first virtual line VL1 and the second virtual line VL2 are virtual lines that extend along the surface of the human head model HM. Furthermore, as the "human head model HM," a female human head model (width 151.24 mm, depth 206.82 mm, height 233.01 mm) created based on the average female human head data (2014 version) manufactured by Digital Human Technology Co., Ltd. can be used.

[0016] [Main Unit Configuration] As shown in Figures 2 to 5, the main body 10 comprises a covering portion 20 that covers the wearer's eyes and / or the area around the eyes and temples when worn, and a pair of ear attachment portions 30 that can be attached to the wearer's ears. Specifically, the main body 10 has the covering portion 20 on the inside in the width direction, and a pair of ear attachment portions 30 on both ends on the outside in the width direction. In this embodiment, the covering portion 20 and the ear attachment portions 30 are formed as a single unit. More specifically, the covering portion 20 and the ear attachment portions 30 are continuous from the covering portion 20 to the ear attachment portions 30 without increasing the bending rigidity; in other words, there is no part in the region from the covering portion 20 to the ear attachment portions 30 that has higher bending rigidity than the covering portion 20. That is, in this embodiment, in the main body 10, the ear attachment portions 30 are formed on both ends in the width direction of the covering portion 20 without the need for fusion parts or reinforcing parts to connect the ear attachment portions 30 to the covering portion 20.

[0017] As described above, the pair of ear attachment parts 30 are integrally formed with the covering part 20, which improves the fit of the covering part 20 when wearing the eye mask 1. Specifically, because the covering part 20 and the ear attachment parts 30 are integrally formed with the main body part 10, no gap is formed between the wearer's temples and the covering part 20, improving the fit of the covering part 20 to the wearer's temples and enhancing the warming effect on the wearer's temples. Furthermore, the improved fit of the covering part 20 to the wearer's temples enhances the sense of immersion provided to the wearer.

[0018] Furthermore, the main body portion 10 has an elongated upper edge portion 11 that is located on the wearer's forehead side when the eye mask 1 is worn, an elongated lower edge portion 12 that is located on the wearer's cheek side when the eye mask 1 is worn, and a pair of side edges 13 that extend from both ends of the upper edge portion 11 to both ends of the lower edge portion 12, and is formed as a long rectangular shape in the width direction. In this embodiment, the upper edge portion 11 and the lower edge portion 12 are formed by the upper and lower edges of the covering portion 20 and the ear attachment portion 30, and the side edges 13 are formed by the side edges of the ear attachment portion 30.

[0019] In this specification, "rectangular" means a quadrilateral shape having a pair of long sides and a pair of short sides, and specifically refers to a shape that falls under either (1) or (2) below. (1) The upper edge 11 and side edge 13 and the lower edge 12 and side edge 13 are perpendicular to each other, and the main body 10 as a whole is a perfect rectangle. (2) For example, the main body portion 10 is substantially rectangular in shape as a whole, such as when at least one of the upper edge portion 11, the lower edge portion 12, and the side edge portion 13 is formed in an arc shape, or when at least one of the connection portion between the upper edge portion 11 and the side edge portion 13 and the connection portion between the lower edge portion 12 and the side edge portion 13 is formed in an arc shape.

[0020] The upper edge 11 and lower edge 12 are formed in an arc shape that curves slightly upward from the center of the main body 10. The side edge 13 is formed in an arc shape that curves outward in the width direction of the main body 10. Furthermore, the connection portion between the upper edge 11 and the side edge 13 and the connection portion between the lower edge 12 and the side edge 13 are each formed in an arc shape that curves outward from the main body 10. Having such a configuration has the advantage of improving the design of the eye mask 1.

[0021] Furthermore, in this embodiment, the main body 10 is formed in a long rectangular shape in the width direction, and the covering portion 20 and the ear attachment portion 30 are integrally formed in the main body 10. Therefore, the main body 10 can cover the wearer from the outer corner of the eyebrow to the upper end of the base of the ear without any gaps. This has the advantage of improving the sense of immersion given to the wearer.

[0022] The shape of the main body portion 10 is not limited to this, and for example, at least one of the upper edge portion 11 and the lower edge portion 12 may be formed in a straight line extending along the width direction, or at least one of the upper edge portion 11 and the lower edge portion 12 may be formed in an arc shape that curves downward toward the center of the main body portion 10, or at least one of the upper edge portion 11 and the lower edge portion 12 may locally protrude or curve, or the side edge portion 13 may be formed in a straight line extending along the vertical direction, or the side edge portion 13 may locally protrude or curve, or at least one of the upper edge portion 11 and the side edge portion 13 and the lower edge portion 12 and the side edge portion 13 may be perpendicular, or it may have any other known shape.

[0023] Furthermore, although this embodiment has described the main body 10 as having the covering portion 20 and the ear attachment portion 30 integrally formed, it is not limited to this, and the ear attachment portion 30 may be a separate component attached to both ends of the covering portion 20 in the width direction.

[0024] As shown in Figure 2, the widthwise length L1 of the main body 10 is preferably 220 mm or more, more preferably 240 mm or more, and even more preferably 260 mm or more, from the viewpoint of covering the wearer's temples with the covering portion 20 when wearing the eye mask 1. Furthermore, the widthwise length L1 of the main body 10 is preferably 360 mm or less, more preferably 340 mm or less, and even more preferably 320 mm or less, from the viewpoint of suppressing sagging of the main body 10 when wearing the eye mask 1 and improving the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples. In other words, the widthwise length L1 of the main body 10 is preferably 220 mm or more and 360 mm or less, more preferably 240 mm or more and 340 mm or less, and even more preferably 260 mm or more and 320 mm or less.

[0025] In this specification, "length in the width direction of the main body" means the length that corresponds to any one of the following (1) to (3). (1) As shown in Figure 2, when the side edge portion 13 is formed in an arc shape, or when the side edge portion 13 is not formed in a straight line extending in the vertical direction, the length of the straight line along the width direction from the tangent line along the vertical direction of one side edge portion 13 to the tangent line along the vertical direction of the other side edge portion 13. (2) If the side edge portion 13 is formed in a straight line extending along the vertical direction, the length of the straight line along the width direction from one side edge portion 13 to the other side edge portion 13. (3) If one of the pair of side edges 13 is formed on a straight line extending in the vertical direction, and the other of the pair of side edges 13 is not formed on a straight line extending in the vertical direction, the length of the straight line along the width direction from the tangent to the vertical direction of one side edge 13 to the tangent to the vertical direction of the other side edge 13.

[0026] As shown in Figure 2, the vertical length L2 of the main body 10 is preferably 80 mm or more, more preferably 85 mm or more, and even more preferably 90 mm or more, from the viewpoint of increasing the covering area of ​​the covering part 20 over the wearer's face and giving the wearer a sense of immersion. Also, the vertical length L2 of the main body 10 is preferably 130 mm or less, more preferably 110 mm or less, and even more preferably 105 mm or less, from the viewpoint of reducing the covering area of ​​the covering part 20 over the wearer and preventing the wearer from feeling uncomfortable. In other words, the vertical length L2 of the main body 10 is preferably 80 mm or more and 130 mm or less, more preferably 85 mm or more and 110 mm or less, and even more preferably 90 mm or more and 105 mm or less.

[0027] In this specification, "vertical length of the main body" means any length that falls under any one of the following (1) to (3). (1) As shown in Figure 2, when the upper edge 11 and lower edge 12 are formed in an arc shape, or when the upper edge 11 and lower edge 12 are not formed in a straight line extending along the width direction, the length of the straight line along the vertical direction from the tangent line along the width direction of the upper edge 11 to the tangent line along the width direction of the lower edge 12. (2) When the upper edge portion 11 and the lower edge portion 12 are formed in a straight line extending along the width direction, the straight length along the vertical direction from the upper edge portion 11 to the lower edge portion 12. (3) If either the upper edge 11 or the lower edge 12 is formed in a straight line extending along the width direction, and the other of the upper edge 11 or the lower edge 12 is not formed in a straight line extending along the width direction, the length of the straight line along the vertical direction from either the upper edge 11 or the lower edge 12 to the tangent line along the width direction of the other of the upper edge 11 or the lower edge 12.

[0028] [Structure of the covering] As shown in Figures 2 to 5, the covering portion 20 is a covering area formed on the inside of the main body portion 10 in the width direction. Specifically, when the covering portion 20 and the ear attachment portion 30 can be clearly distinguished, the covering portion 20 refers to the area of ​​the main body portion 10 excluding the ear attachment portion 30. On the other hand, when it is difficult to clearly distinguish the covering portion 20 and the ear attachment portion 30, the covering portion 20 refers to the area defined by the upper edge which constitutes a part of the upper edge portion 11 of the main body portion 10, the lower edge which constitutes a part of the lower edge portion 12 of the main body portion 10, and a pair of imaginary lines VL3 (see Figure 3) extending vertically from the ends on the inside of the pair of ear insertion holes 31 in the width direction, which will be described later. In this embodiment, the area indicated by dots in Figure 3 is the covering portion 20. The covering portion 20 as a whole is formed in a rectangular shape that is elongated in the width direction. However, the shape of the covering portion 20 is not limited thereto; at least one of the upper and lower edges may protrude locally, or at least one of the upper and lower edges may be curved overall or locally.

[0029] Furthermore, the covering portion 20 has a nose passage portion 24 that can pass through the wearer's nose. The nose passage portion 24 is a roughly triangular cutout formed in a tapered shape from the lower edge to the upper edge of the covering portion 20. The nose passage portion 24 is also formed on the central portion 22 of the covering portion 20. Specifically, the central portion 22 of the covering portion 20 has a vertical center line 23 that divides the covering portion 20 in the width direction, and the nose passage portion 24 is formed so that the center of the nose passage portion 24 in the width direction is located on the vertical center line 23. In this way, because the covering portion 20 has a nose passage portion 24, the covering portion 20 is not positioned on the bridge of the wearer's nose, so the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes can be improved. Furthermore, the thermal effect of the heating element 40 on the wearer's eyes and / or the area around the eyes can be enhanced. Furthermore, the improved fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes can improve the sense of immersion given to the wearer. The nasal passage portion 24 may also be a slit formed from the lower edge to the upper edge of the covering portion 20.

[0030] In this specification, "central portion 22" refers to a location on the inside in the width direction of the covering portion 20, and more specifically, it refers to the region located between the heating elements 40 provided on the covering portion 20 in a plan view of the eye mask 1 (see Figure 3).

[0031] The widthwise length D1 of the covering portion 20 (see Figures 2 and 3) is preferably 150 mm or more, more preferably 185 mm or more, and even more preferably 200 mm or more, from the viewpoint of increasing the covering area and contact area of ​​the covering portion 20 with respect to the wearer's eyes and / or the area around the eyes and temples, thereby increasing the wearer's sense of immersion and providing the wearer with greater comfort. Furthermore, the widthwise length D1 of the covering portion 20 is preferably 300 mm or less, more preferably 280 mm or less, and even more preferably 255 mm or less, from the viewpoint of preventing impairment of the stretchability of the covering portion 20 in the widthwise direction, as described later. In other words, the vertical length D1 of the covering portion 20 is preferably 150 mm or more and 300 mm or less, more preferably 185 mm or more and 280 mm or less, and even more preferably 200 mm or more and 255 mm or less.

[0032] In this specification, "length in the width direction of the covering portion" means the length along the width direction from the end of the ear insertion hole 31 on the vertical centerline 23 side of one ear attachment portion 30 (described later) to the end of the ear insertion hole 31 on the vertical centerline 23 side of the other ear attachment portion 30, as shown in Figures 2 and 3.

[0033] The area of ​​the covering portion 20 is preferably 200% to 600% of the total area of ​​the heating element 40, more preferably 250% to 550%, and even more preferably 300% to 500%. This is done from the viewpoint of increasing the area covering the wearer's eyes and / or the area around the eyes and temples when wearing the eye mask 1, thereby enhancing the wearer's sense of immersion and providing the wearer with greater comfort.

[0034] In this specification, "area of ​​the covering portion" refers to the area of ​​the covering portion 20 in a plan view (see Figures 2 and 3). Also, in this specification, "total area of ​​the heating element" refers to the total area of ​​the portion of the heating element 40 excluding the first sheet 41 and the second sheet 42 described later (i.e., the base layer 43, the water-retaining layer 44, or the heating layer 45) in a plan view (see Figures 2 and 7).

[0035] Specifically, the area of ​​the covering portion 20 is set at 15,000 mm² when the eye mask 1 is worn, in order to increase the area covering the wearer's eyes and / or the area around the eyes and temples, thereby enhancing the wearer's sense of immersion and providing the wearer with greater comfort and security. 2 Preferably, it should be 17,000 mm or more. 2 It is more preferable that the amount be greater than or equal to 19000 mm. 2 It is even more preferable that the above conditions are met.

[0036] The material constituting the covering portion 20 is configured to be stretchable in the width direction. Specifically, the covering portion 20 is formed of a nonwoven fabric with excellent stretchability in the width direction, and is configured to be stretchable in the width direction as a whole. The nonwoven fabric fiber material with excellent stretchability in the width direction can be the nonwoven fabric fiber material that forms the inner sheet 50 and the nonwoven fabric fiber material that forms the outer sheet 60, which will be described later. In this way, because the covering portion 20 is configured to be stretchable in the width direction, when the eye mask 1 is worn, the covering portion 20 stretches in the width direction according to the size of the wearer's face, thereby improving the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples. The stretchability characteristics of the material constituting the covering portion 20 will be described in detail later.

[0037] In this embodiment, the entire covering portion 20 has been described as being configured to be stretchable in the width direction. However, the embodiment is not limited to this, and for example, the covering portion 20 may be made stretchable in the width direction by forming only the central portion 22 of the covering portion 20 from a material with excellent stretchability in the width direction.

[0038] As shown in Figures 2 to 5, the covering portion 20 has an inner sheet 50 that is located on the skin side of the wearer when the eye mask 1 is worn, and an outer sheet 60 that is located on the non-skin side of the wearer when the eye mask 1 is worn. In other words, the covering portion 20 as a whole is formed in the shape of a sheet.

[0039] The inner sheet 50 and the outer sheet 60 are joined together with the heating element 40 positioned between them. The heating element 40 may be bonded to the outer sheet 60 with an adhesive, to the inner sheet 50 with an adhesive, to either the outer sheet 60 or the inner sheet 50 with an adhesive, or it may be placed in a bag-like space where the outer sheet 60 and the inner sheet 50 are joined together without the use of an adhesive. A hot-melt adhesive is preferred as the adhesive, but the device is not limited to this, and various known fastening methods can be used. For example, adhesives other than hot-melt adhesives, sewing, heat fusion, or embossing are possible, but the device is not limited as long as it can be fixed.

[0040] Alternatively, by making the inner sheet 50 and the outer sheet 60 locally non-adherent, an opening and storage space for inserting and removing the heating element 40 may be formed between the inner sheet 50 and the outer sheet 60.

[0041] The widthwise length of the inner sheet 50 is shorter than the widthwise length of the outer sheet 60. Specifically, as shown in Figure 2, the end 50a of the inner sheet 50 is positioned inward in the widthwise direction compared to the end of the outer sheet 60. In this embodiment, the widthwise length of the inner sheet 50 is shorter than the widthwise length D1 of the covering portion 20 described above. On the other hand, the vertical length of the inner sheet 50 is equal to the vertical length L2 of the main body portion 10. That is, in this embodiment, the peripheral edge of the inner sheet 50 constitutes only a part of the upper edge 11 and a part of the lower edge 12 of the main body portion 10, and does not constitute the remaining part of the upper edge 11, the remaining part of the lower edge 12, or the side edge 13 of the main body portion 10. On the other hand, the peripheral edge of the outer sheet 60 constitutes the upper and lower edges of the covering portion 20 and the upper, lower, and side edges of the ear attachment portion 30. In other words, the outer sheet 60 constitutes the entire upper edge 11, lower edge 12, and side edge 13 of the main body 10. Furthermore, in this embodiment, the nose passage 24 of the covering portion 20 is provided on both the inner sheet 50 and the outer sheet 60.

[0042] In this embodiment, the widthwise length of the inner sheet 50 is shorter than the widthwise length D1 of the covering portion 20, but this is not limited to this. The widthwise length of the inner sheet 50 and the widthwise length D1 of the covering portion 20 may be the same length, or the widthwise length of the inner sheet 50 may be longer than the widthwise length D1 of the covering portion 20. Also, in this embodiment, the widthwise length of the inner sheet 50 is shorter than the widthwise length of the outer sheet 60, but this is not limited to this. The widthwise length of the inner sheet 50 and the widthwise length of the outer sheet 60 may be the same length, or the widthwise length of the inner sheet 50 may be longer than the widthwise length of the outer sheet 60.

[0043] The thickness of the covering portion 20 is preferably 2.0 mm or more, more preferably 2.5 mm or more, and even more preferably 3.5 mm or more, from the viewpoint of improving the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples. By improving the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples, the heat generated from the heating element 40 can be more easily transmitted to the wearer's eyes and / or the area around the eyes and temples, thereby increasing the warming effect on the wearer's eyes and / or the area around the eyes and temples. It can also improve the sense of immersion given to the wearer. Furthermore, the thickness of the covering portion 20 is preferably 30.0 mm or less, more preferably 20.0 mm or less, and even more preferably 15.0 mm or less, from the viewpoint of reducing the load of the covering portion 20 on the wearer's face and providing comfort to the wearer. In other words, the thickness of the covering portion 20 is preferably 2.0 mm or more and 30.0 mm or less, more preferably 2.5 mm or more and 20.0 mm or less, and even more preferably 3.5 mm or more and 15.0 mm or less.

[0044] In this specification, "thickness of the covering portion" refers to the thickness of the covering portion 20 only, and does not include the thickness of the heating element 40. Furthermore, as will be described later, if the covering portion 20 is composed of a single sheet, the thickness of that single sheet will be the thickness of the covering portion 20. On the other hand, if the covering portion 20 is composed of multiple sheets, as in the covering portion 20 according to this embodiment, the total thickness of those multiple sheets will be the thickness of the covering portion 20.

[0045] The inner sheet 50 is formed to be thicker than the outer sheet 60. In this way, the greater thickness of the inner sheet 50, which is located on the skin side of the wearer when the eye mask 1 is worn, improves the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples. As a result, the heat generated from the heating element 40 is more easily transferred to the wearer's eyes and / or the area around the eyes and temples, thereby enhancing the warming effect on the wearer's eyes and / or the area around the eyes and temples. Furthermore, the improved fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples enhances the sense of immersion provided to the wearer.

[0046] Specifically, the thickness of the inner sheet 50 is preferably 1.0 mm or more, more preferably 1.2 mm or more, and even more preferably 2.0 mm or more, from the viewpoint of improving the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples. As described above, by improving the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples, the heat generated from the heating element 40 can be more easily transmitted to the wearer's eyes and / or the area around the eyes and temples, thereby increasing the warming effect on the wearer's eyes and / or the area around the eyes and temples. It can also improve the sense of immersion given to the wearer. Furthermore, the thickness of the inner sheet 50 is preferably 20.0 mm or less, more preferably 15.0 mm or less, and even more preferably 12.0 mm or less, from the viewpoint of reducing the load of the covering portion 20 on the wearer's face and providing comfort to the wearer. In other words, the thickness of the inner sheet 50 is preferably 1.0 mm or more and 20.0 mm or less, more preferably 1.2 mm or more and 15.0 mm or less, and even more preferably 2.0 mm or more and 12.0 mm or less.

[0047] Furthermore, the thickness of the area on the covering portion 20 of the eye mask 1 where the heating element 40 is placed is preferably 2.5 mm or more, more preferably 4.0 mm or more, and even more preferably 5.5 mm or more, from the viewpoint of improving the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples. By improving the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples, the heat generated from the heating element 40 can be more easily transmitted to the wearer's eyes and / or the area around the eyes and temples, thereby increasing the warming effect on the wearer's eyes and / or the area around the eyes and temples. It can also improve the sense of immersion given to the wearer. Furthermore, the thickness of the area on the covering portion 20 of the eye mask 1 where the heating element 40 is placed is preferably 32.0 mm or less, more preferably 22.0 mm or less, and even more preferably 17.0 mm or less, from the viewpoint of reducing the load of the covering portion 20 on the wearer's face and providing comfort to the wearer. In other words, the thickness of the portion of the covering 20 of the eye mask 1 where the heating element 40 is placed is preferably 2.5 mm or more and 32.0 mm or less, more preferably 4.0 mm or more and 22.0 mm or less, and even more preferably 5.5 mm or more and 17.0 mm or less.

[0048] In this specification, "thickness of the portion of the eye mask covering where the heating element is located" refers to the total thickness of the covering portion 20 and the heating element 40. If the thickness of the heating element 40 differs in different parts, the thickness of the thickest portion shall be used.

[0049] In this embodiment, the inner sheet 50 and the outer sheet 60 are breathable. The breathability of the inner sheet 50 allows water vapor released from the heating element 40 to be supplied to the wearer's eyes and / or the area around the eyes, thus providing the advantage of warming the wearer's eyes and / or the area around the eyes. Furthermore, the breathability of the outer sheet 60 allows for the accurate supply of oxygen to the heating element 40, thus providing the advantage of exhibiting a good thermal effect. Note that one of the inner sheet 50 and the outer sheet 60 may be poorly breathable or non-breathable. Alternatively, a part of the inner sheet 50 or the outer sheet 60 may be breathable, poorly breathable, or non-breathable.

[0050] The air permeability of the inner sheet 50 is preferably 150,000 seconds / 100 mL or less, more preferably 50,000 seconds / 100 mL or less, more preferably 30,000 seconds / 100 mL or less, and even more preferably 10,000 seconds / 100 mL or less, from the viewpoint of efficiently supplying water vapor to the wearer's eyes and / or the area around the eyes.

[0051] In this specification, "air permeability" refers to a value measured according to JIS P8117 (2009 revised edition), where 100 mL of air permeates 6.42 cm³ under constant pressure. 2 Air permeability is defined as the time it takes for air to pass through an area. Therefore, a high value for air permeability means that it takes a long time for air to pass through, i.e., it means that the air permeability is low. Conversely, a low value for air permeability means that the air permeability is high. Thus, there is an inverse relationship between the high value of air permeability and the high or low level of air permeability. Air permeability can be measured with a Wang Ren air permeability meter. In this specification, an air permeability of less than 30,000 seconds / 100 mL is defined as "air permeable," an air permeability of 30,000 seconds / 100 mL or more and less than 80,000 seconds / 100 mL is defined as "poorly air permeable," and an air permeability of 80,000 seconds / 100 mL or more is defined as "non-air permeable."

[0052] The materials for the inner sheet 50 and the outer sheet 60 can be materials that have been conventionally used in the field of eye mask technology. For example, nonwoven fabrics, woven fabrics and paper or other fiber sheets, resin foam sheets, metal sheets, or combinations thereof can be used. Among these, nonwoven fabric is preferred from the viewpoint of ease of processing, economic efficiency, and ensuring stretchability in the width direction.

[0053] The nonwoven fabric fiber material is preferably composed of one or more fibers selected from, for example, polyester such as PET (polyethylene terephthalate); polyolefins such as PE (polyethylene), PP (polypropylene), and ethylene propylene copolymers; rayon; cotton; and wood pulp fibers such as lyocell. Furthermore, the nonwoven fabric can be manufactured using one or more of the above-mentioned materials by methods such as the air-through method, spunbond method, needle punch method, meltblown method, carding method, heat fusion method, water entanglement method, and solvent bonding method, and may be single-layer or multi-layer structure. The nonwoven fabric may also be chemically treated depending on the purpose.

[0054] Furthermore, the inner sheet 50 and the outer sheet 60 may each be a single-layer structure consisting of only one sheet material, whether single-layer or multi-layer, or a multi-layer structure made by layering two or more types of sheet materials. In addition, the inner sheet 50 and the outer sheet 60 may be made of different materials. Specifically, the outer sheet 60, which is located on the side of the wearer's skin when the eye mask 1 is worn, may be made of a material suitable for giving the eye mask 1 shape retention, or a material suitable for improving the texture and appearance of the outer surface. More specifically, the outer sheet 60, which is located on the side of the wearer's skin when the eye mask 1 is worn, is most preferably made of a nonwoven fabric manufactured by the needle punching method described above, from the viewpoint of ensuring the stretchability of the covering portion 20 and the ear attachment portion 30 (described later) in the width direction. With such a configuration, the covering portion 20 and the ear attachment portion 30 can be easily stretched in the width direction, and the fit when wearing the eye mask 1 can be improved. On the other hand, the inner sheet 50, which is located on the skin side of the eye mask 1 when worn, may be made of materials chosen for their pleasant feel against the skin. Furthermore, the inner sheet 50 and the outer sheet 60 may be colored in any color, or have any pattern (design) applied by printing or other means. Such a configuration improves the texture and aesthetic appeal, making it possible to create an eye mask 1 that suits the user's preferences.

[0055] In this embodiment, the covering portion 20 has been described as having an inner sheet 50 and an outer sheet 60, but it is not limited to this, and for example, it may be configured to have only one of the inner sheet 50 and the outer sheet 60. That is, the covering portion 20 may be composed of one sheet or multiple sheets. Also, the covering portion 20 may have other sheets between the inner sheet 50 and the heating element 40, or other sheets between the outer sheet 60 and the heating element 40. If the covering portion 20 is composed of one sheet, the heating element 40 may be bonded to the one sheet, or it may be housed in a heating element housing formed on the one sheet.

[0056] The covering portion 20 having the above configuration is configured to conduct heat from the heating element 40 to the wearer's temples and is configured to be stretchable in the width direction. Specifically, the covering portion 20 is configured to conduct heat from the heating element 40 to the wearer's temples by covering the wearer's eyes and / or the area around the eyes and the temples when the eye mask 1 is worn. When the wearer's eyes and / or the area around the eyes and the temples are covered by the covering portion 20, first, the heat generated from the heating element 40 is conducted to the area of ​​the covering portion 20 facing the wearer's eyes and / or the area around the eyes. Next, the heat conducted to the area of ​​the covering portion 20 facing the wearer's eyes and / or the area around the eyes is conducted to the area of ​​the covering portion 20 facing the wearer's temples. Finally, the heat conducted to the area of ​​the covering portion 20 facing the wearer's temples is conducted to the wearer's temples.

[0057] In particular, the covering portion 20 according to this embodiment has at least one of the above-described configurations of the shape of the covering portion 20, the extensibility of the covering portion 20, the thickness of the covering portion 20, and the thickness of the inner sheet 50, which improves the fit of the covering portion 20 to the wearer's eyes and / or the area around the eyes and temples. As a result, the heat generated from the heating element 40 is more easily transmitted to the wearer's eyes and / or the area around the eyes and temples, thereby enhancing the warming effect on the wearer's eyes and / or the area around the eyes and temples.

[0058] [Earpiece Composition] As shown in Figures 2 to 5, the ear attachment portion 30 is an ear loop that can be attached to the wearer's ear. The ear attachment portion 30 is provided at both ends in the width direction of the main body portion 10 and is formed continuously with the upper and lower edges of the covering portion 20.

[0059] The ear attachment portion 30 has an ear insertion hole 31 through which the wearer's ear can be inserted. The ear insertion hole 31 is an opening with a shape and size that allows the wearer's ear to be inserted when wearing the eye mask. The shape and size of the ear insertion hole 31 can be formed into various known shapes and sizes, as long as it is possible to insert at least the wearer's ear through it when wearing the eye mask and the shape and size do not impair the fit of the covering portion 20 when wearing the eye mask 1. In this embodiment, the ear attachment portion 30 has been described as having an ear insertion hole 31 through which the wearer's ear can be inserted, but it is not limited to this, and the ear attachment portion 30 does not have to have an ear insertion hole 31. For example, the ear attachment portion 30 may have a configuration that allows the wearer's ear to pass through a notch or slit.

[0060] Furthermore, in this embodiment, the ear attachment portion 30 is formed integrally with the covering portion 20. Specifically, the ear attachment portion 30 is an ear loop formed at both ends in the width direction of the covering portion 20, and is formed on the outer sheet 60 described above. In other words, in the eye mask 1 according to this embodiment, the area where the ear attachment portion 30 is formed (i.e., the outer sheet 60) is a part that is less rigid (more flexible) than the covering portion 20, and therefore, distortion and wrinkles are likely to occur when the eye mask 1 is packaged in the packaging bag 100 (i.e., in the state of the packaged eye mask 200).

[0061] Therefore, the ear attachment portion 30 according to this embodiment has sufficient rigidity to prevent distortion or twisting even when the packaging bag 100 vibrates while the eye mask 1 is packaged in the packaging bag 100. On the other hand, it also has sufficient flexibility to prevent the disadvantages of making the rigidity of the ear attachment portion 30 too high (for example, the disadvantage of causing discomfort to the wearer due to increased strain on the ears when wearing the eye mask 1). In this way, by setting the rigidity and flexibility (hereinafter referred to as "rigidity / softness") of the ear attachment portion 30 within an appropriate range, it is possible to reduce the possibility of distortion or twisting of the ear attachment portion 30 when the eye mask 1 is removed from the packaged eye mask 200, and to reduce the strain on the wearer's ears when using the eye mask 1. The rigidity / softness of the ear attachment portion 30 will be described in detail later.

[0062] [Rigidity / softness of the earpiece] As described above, the ear attachment portion 30 has a degree of rigidity and flexibility such that even when the packaging bag 100 is vibrated while the eye mask 1 is packaged in the packaging bag 100, the eye mask 1 does not become distorted or wrinkled. Specifically, the rigidity and flexibility of the ear attachment portion 30 is preferably 5 mm or more, more preferably 20 mm or more, and even more preferably 40 mm or more. Furthermore, it is preferable that the ear attachment portion 30 has a degree of rigidity and flexibility such that it does not burden the wearer's ears when worn. Specifically, the rigidity and flexibility of the ear attachment portion 30 is preferably 125 mm or less, and more preferably 100 mm or less. That is, the rigidity and flexibility of the ear attachment portion 30 is preferably 5 mm or more and 125 mm or less, and more preferably 40 mm or more and 100 mm or less. Here, the rigidity and flexibility of the ear attachment portion 30 can be measured by the following method.

[0063] [Method for measuring stiffness and flexibility] The rigidity of the ear attachment portion 30 can be measured using a measuring instrument conforming to Method A (45° cantilever method) of JIS L 1096 "8.21. Method for measuring rigidity". Specifically, the rigidity of the ear attachment portion 30 is evaluated based on the length (mm) the sample moved from the position of the other end when the center point of one end of the sample touches the slope, after taking a sample with vertical dimensions of 20 mm and width dimensions of 150 mm from the material constituting the ear attachment portion 30 (in this embodiment, the outer sheet 60). In this embodiment, the ear attachment portion 30 has an ear insertion hole 31, but in this test, a sample is taken from the part of the ear attachment portion 30 where the ear insertion hole 31 is not formed, and the rigidity is measured. However, if it is not possible to take a sample with the above dimensions, a sample should be taken with dimensions as close as possible to the above dimensions.

[0064] In this embodiment, the rigidity of the ear attachment portion 30 is determined based on the rigidity value in the width direction of a sample taken from the material constituting the ear attachment portion 30. More specifically, the rigidity of the ear attachment portion 30 described above is the rigidity in the width direction of the ear attachment portion 30.

[0065] [Configuration of the heating element] As shown in Figures 2 to 5, the heating elements 40 are provided in the width direction with the central portion 22 in the width direction of the covering portion 20 as the boundary. Preferably, the heating elements 40 are arranged with a distance D2 between the proximal ends, which will be described later, with the vertical center line 23 of the covering portion 20 as the boundary.

[0066] Furthermore, the heating elements 40 may be provided in pairs in the region of the covering portion 20 with respect to the central portion 22 in the width direction, or one heating element may be provided over the entire covering portion 20. Also, when multiple heating elements 40 are provided on the covering portion 20, the heating characteristics of the multiple heating elements 40, as described later, may be the same or different, but it is more preferable that they be the same.

[0067] In the following explanation, the heating element 40 located to the left of the vertical center line 23 (to the left in Figure 2) will be referred to as "heating element 40A," the heating element 40 located to the right of the vertical center line 23 (to the right in Figure 2) will be referred to as "heating element 40B," and heating elements 40A and 40B will be collectively referred to as "heating element 40."

[0068] In this embodiment, the proximal ends of the heating elements 40 are not fixed to the covering portion 20. In this specification, "proximal ends of the heating elements" refers to the end of heating element 40A on the side of the vertical centerline 23 and the end of heating element 40B on the side of the vertical centerline 23 in a plan view of the covering portion 20 (see Figure 2). In this way, because the proximal ends of the heating elements 40 are not fixed to the covering portion 20, the spacing between the heating elements 40 provided on the covering portion 20 can be widened as the covering portion 20 extends in the width direction. Therefore, the spacing between the heating elements 40 can be widened according to the size of the wearer's face, and regardless of the size of the wearer's face, it is possible to accurately apply a warming effect to the wearer's eyes and / or the area around the eyes and temples. However, this is not limited to this, and a configuration in which the proximal ends of the heating elements 40 are fixed to the covering portion 20 is also possible.

[0069] Furthermore, as shown in Figure 2, the heating element 40 is positioned with a distance D2 between its proximal ends, with the vertical center line 23 of the covering portion 20 as the boundary. Specifically, the distance D2 between the proximal ends of the heating element 40 is preferably 5 mm or more, more preferably 10 mm or more, even more preferably 15 mm or more, preferably 35 mm or less, more preferably 30 mm or less, and even more preferably 25 mm or less, from the viewpoint of improving the fit to the wearer's nose and accurately applying a warming effect to the wearer's eyes and / or the area around the eyes and temples. In other words, the distance D2 between the proximal ends of the heating element 40 is preferably 5 mm or more and 35 mm or less, more preferably 10 mm or more and 30 mm or less, and even more preferably 15 mm or more and 25 mm or less.

[0070] In this specification, "distance between the proximal ends of the heating elements" refers to the distance from the end of one heating element 40 (for example, heating element 40A in Figure 2) on the side of the vertical centerline 23 to the end of the other heating element 40 (for example, heating element 40B in Figure 2) on the side of the vertical centerline 23, in a plan view of the eye mask 1 (as shown in Figure 2).

[0071] The distal end of the heating element 40 is bonded to the covering portion 20. In this specification, "distal end of the heating element" refers to the end of the heating element 40A opposite to the end on the vertical centerline 23 side, and the end of the heating element 40B opposite to the end on the vertical centerline 23 side, in a plan view of the covering portion 20 (see Figure 2). By bonding the distal end of the heating element 40 to the covering portion 20 in this way, the ability of the covering portion 20 to hold the heating element 40 can be increased, and the distance D2 between the proximal ends of the heating element 40 can be increased in the width direction as the covering portion 20 extends in the width direction. Therefore, regardless of the size of the wearer's face, the warming effect of the heating element 40 can be accurately applied to the wearer's eyes and / or the area around the eyes and temples.

[0072] The planar shapes of the heating elements 40A and 40B are not particularly limited and may have shapes such as circles or polygons. However, from the viewpoint of manufacturing efficiency, ease of handling, and thermal effect, the planar shapes of the heating elements 40A and 40B are preferably rectangular, approximately rectangular, square, or approximately square, and from the viewpoint of ease of handling, square or approximately square is more preferred. As shown in Figures 2 to 4, the heating elements 40A and 40B according to this embodiment each have a square shape.

[0073] The heating element 40 having the above configuration is positioned on the covering portion 20 so as to directly or indirectly face the wearer's eyes and / or the area around the eyes when the eye mask 1 is worn.

[0074] In this specification, examples of configurations that "directly face the wearer's eyes and / or the area around the eyes" include, for example, a configuration in which the heating element 40 is attached to the inside of the covering portion 20, or a configuration in which an opening is formed in the area of ​​the inner sheet 50 that faces the wearer's eyes, exposing the heating element 40. Furthermore, examples of configurations that "indirectly face the wearer's eyes and / or the area around the eyes" include a configuration in which the heating element 40 faces the wearer's eyes and / or the area around the eyes via a sheet (such as the inner sheet 50) that constitutes the covering portion 20.

[0075] In this embodiment, the heating element 40 is provided between the inner sheet 50 and the outer sheet 60, and is configured to indirectly face the wearer's eyes and the area around their eyes via the inner sheet 50 when the eye mask 1 is worn. That is, the heating element 40 is positioned in the covering portion 20 so as to indirectly face the wearer's eyes and the area around their eyes when the eye mask 1 is worn.

[0076] [Heat generation characteristics of heating elements] The heating element 40 is configured to generate heat by reacting with oxygen in the air. In this embodiment, the heating element 40 is configured to generate heat by reacting with oxygen in the air and to generate water vapor, which can then be supplied to the wearer's eyes and / or the area around the eyes. That is, the heating element 40 according to this embodiment is configured to generate warm steam through the oxidation reaction of an oxidizable metal.

[0077] Such a heating element 40 can take the form of, for example, a mixture of powders (see, for example, the description in Japanese Patent Publication No. 2004-16753 (Japanese Patent Application No. 2002-180501), etc.), a sheet such as a paper-making sheet (see, for example, the description in Japanese Patent Publication No. 2005-058744 (Japanese Patent Application No. 2004-31360), etc.), or a coated sheet in which a dispersion liquid or the like is applied to a base material (see, for example, the description in Japanese Patent Publication No. 2013-146555 (Japanese Patent Application No. 2012-279804), etc.). Furthermore, it is preferable that the heating element 40 contains an oxidizable metal, a carbon component, and water.

[0078] The oxidizable metal is a metal that generates heat during oxidation reactions, and examples include one or more powders or fibers selected from iron, aluminum, zinc, manganese, magnesium, and calcium. Among these, iron is preferred in terms of handling, safety, manufacturing cost, shelf life, and stability, and iron powder is particularly preferred. Examples of iron powder include reduced iron powder and atomized iron powder. The particle size of the oxidizable metal can be, for example, 0.1 μm to 300 μm.

[0079] The carbon component has at least one function of water retention, oxygen supply, and catalytic activity, and it is preferable that it possesses all three of these functions. As the carbon component, one or more selected from activated carbon, carbon black, and graphite can be used. Among these, activated carbon is more preferably used because it readily adsorbs oxygen when wet and maintains a constant moisture level in the heating element 40.

[0080] The heating element 40 further contains a water-retaining material. While there are no particular restrictions on the type of water-retaining material as long as it is capable of retaining water, it is preferable that it has excellent vapor release properties. Examples of water-retaining materials include one or more selected from water-absorbing powders such as carbon components, fibrous materials, superabsorbent polymers (SAP), starch, zeolite, perlite, calcium silicate, and vermiculite. The water-absorbing agent used is appropriate depending on the form of the heating element 40.

[0081] Here, the detailed structure of the heating element 40 will be explained using Figures 7 and 8. As shown in Figures 7 and 8, the heating element 40 has a first sheet 41 that is located on the skin side of the wearer when the eye mask 1 is worn, a second sheet 42 that is located on the non-skin side of the wearer when the eye mask 1 is worn, a base layer 43 provided between the first sheet 41 and the second sheet 42, a water-retaining layer 44 provided between the first sheet 41 and the base layer 43, and a heating layer 45 provided between the base layer 43 and the water-retaining layer 44, and is formed as a sheet with an overall laminated structure.

[0082] With the heating element 40 installed on the covering portion 20, the first sheet 41 is configured to face the inner surface sheet 50 of the covering portion 20, and the second sheet 42 is configured to face the outer surface sheet 60 of the covering portion 20. The peripheral edges of the first sheet 41 and the second sheet 42 are joined to each other, forming a bag-like structure with an internal space. In other words, in this embodiment, the base material layer 43, the water-retaining layer 44, and the heating layer 45 are housed in the internal space formed between the first sheet 41 and the second sheet 42. This configuration, in which the first sheet 41 and the second sheet 42 are formed in a bag-like structure with an internal space, has the advantage of allowing for appropriate adjustment of the amount of heat and water vapor.

[0083] The first sheet 41 is breathable. The breathability of the first sheet 41 allows water vapor released from the water-retaining layer 44 to be supplied to the wearer's eyes and / or the area around their eyes, thus providing the advantage of warming the wearer's eyes and / or the area around their eyes. On the other hand, the second sheet 42 is poorly breathable or non-breathable. The poorly breathable or non-breathable nature of the second sheet 42 allows water vapor released from the water-retaining layer 44 to be efficiently supplied to the wearer's eyes and / or the area around their eyes. Note that the first sheet 41 may be poorly breathable or non-breathable, and the second sheet 42 may be breathable. Furthermore, a portion of the first sheet 41 or the second sheet 42 may be breathable, poorly breathable, or non-breathable.

[0084] Preferably, the amount of oxidizable metal contained in the heating layer 45 of the heating element 40 is such that, when the eye mask 1 is packaged in the packaging bag 100 described later, the oxidation reaction can be carried out using the air (oxygen) inside the packaging bag 100, thereby ensuring tight contact between the packaging bag 100 and the eye mask 1. Specifically, the weight (g) of the oxidizable metal contained in the heating element 40 is preferably 1.28g or more, more preferably 1.39g or more, and even more preferably 1.51g or more. On the other hand, from the viewpoint of preventing adverse effects caused by the heating element 40 containing too much oxidizable metal (for example, the temperature of the heating element 40 rising too high, causing the wearer to feel uncomfortably hot and thus compromising comfort), it is preferable that the weight of the oxidizable metal contained in the heating element 40 be within a predetermined range. Specifically, it is preferable that the weight of the oxidizable metal contained in the heating element 40 be 2.9g or less. In other words, the weight of the oxidizable metal contained in the heating element 40 is preferably 1.28g or more and 2.9g or less, more preferably 1.39g or more and 2.9g or less, and even more preferably 1.51g or more and 2.9g or less. Note that "content of oxidizable metal in the heating element" refers to the total amount (sum) of all heating elements provided in the covering portion 20. The ratio of the inner surface area of ​​the sealed packaging bag 100 to the weight of the oxidizable metal will be described in detail later.

[0085] From the viewpoint of providing comfort to the wearer, the maximum temperature of the heating element 40 is preferably 54°C or higher, more preferably 58°C or higher, and even more preferably 62°C or higher. Furthermore, from the viewpoint of preventing the wearer from experiencing discomfort, the maximum temperature of the heating element 40 is preferably 72°C or lower, more preferably 70°C or lower, and even more preferably 68°C or lower. In other words, the maximum temperature of the heating element 40 is preferably 54°C or higher and 72°C or lower, more preferably 58°C or higher and 70°C or lower, and even more preferably 62°C or higher and 68°C or lower. The maximum temperature of the heating element 40 can be measured, for example, using a measuring instrument conforming to JIS S4100. Specifically, the measuring surface of a measuring instrument conforming to JIS S4100 is attached to the area of ​​the outer sheet 60 where the heating element 40 is located, the heating element 40 is started to generate heat in the presence of oxygen, and the highest temperature reached thereafter (°C) is measured as the maximum temperature of the heating element 40.

[0086] The heating element 40 preferably has a heating time of 15 minutes or more, more preferably 20 minutes or more, and even more preferably 25 minutes or more, while maintaining a heating time of 45°C or higher, from the viewpoint of providing comfort to the wearer. Similarly, the heating time of 45°C or higher can be measured using a measuring instrument conforming to JIS S4100, for example. Specifically, the measuring surface of a measuring instrument conforming to JIS S4100 is attached to the area of ​​the outer sheet 60 where the heating element 40 is located, the heating element 40 is started to heat up in the presence of oxygen, and the duration from when the temperature reaches 45°C or higher until it drops below 45°C can be measured as the heating time of 45°C or higher.

[0087] From the viewpoint of supplying sufficient water vapor to the wearer's eyes and / or the area around their eyes, the total cumulative amount of water vapor released by the heating element 40 in the first 10 minutes from the start of water vapor generation is preferably 140 mg or more, more preferably 300 mg or more, even more preferably 1000 mg or more, and even more preferably 1600 mg or more. Furthermore, from the viewpoint of maintaining a comfortable temperature, the total cumulative amount of water vapor released by the heating element 40 in the first 10 minutes from the start of water vapor generation is preferably 2400 mg or less, more preferably 2200 mg or less, even more preferably 2000 mg or less, and even more preferably 1800 mg or less. Note that "cumulative amount of water vapor released in the first 10 minutes from the start of water vapor generation" refers to the total amount (sum) of all heating elements 40 provided in the covering portion 20.

[0088] In other words, in this embodiment, the cumulative amount of water vapor released from the heating elements 40A and 40B in the first 10 minutes after the start of water vapor generation is preferably 70 mg or more, more preferably 150 mg or more, more preferably 500 mg or more, and even more preferably 800 mg or more per cell. Furthermore, the cumulative amount of water vapor released from the heating elements 40A and 40B in the first 10 minutes after the start of water vapor generation is preferably 1200 mg or less, more preferably 1100 mg or less, even more preferably 1000 mg or less, and even more preferably 900 mg or less per cell. Having such a configuration allows for adjustment of the amount of water vapor released from the heating elements 40A and 40B, and also has the advantage that the water vapor released from the heating elements 40A and 40B does not become too hot, providing comfort to the wearer.

[0089] [Method for measuring water vapor generation] In this specification, "steam generation" means that the total amount of water vapor generated in 10 minutes from one cell of the heating element 40 (in this embodiment, heating element 40A or heating element 40B), as measured by the following method, is 10 mg / 10 min or more. This amount of water vapor generation can be easily achieved by using, for example, a paste containing an oxidizable metal, a carbon material, and water as the heating element 40. Here, the cumulative amount of water vapor released from the heating element 40 in the 10 minutes from the start of water vapor generation is a value measured as follows using the measuring device 70 shown in Figure 9. In the following description, the subject is an unheated heating element 40 sealed in a packaging bag 100, and the time required from the start of opening the packaging bag 100 to exposing the heating element 40 to an oxygen-containing atmosphere such as air and placing it on the measuring device 70 shown in Figure 9 is defined as the "start of heating" time, i.e., 5 seconds after the start of opening. The measuring device 70 shown in Figure 9 comprises an aluminum measuring chamber (volume 4.2 L) 71, an inlet passage 72 for introducing dehumidified air (humidity less than 2%, flow rate 2.1 L / min) into the lower part of the measuring chamber 71, an outlet passage 73 for releasing air from the upper part of the measuring chamber 71, an inlet temperature and humidity meter 74 and an inlet flow meter 75 provided in the inlet passage 72, an outlet temperature and humidity meter 76 and an outlet flow meter 77 provided in the outlet passage 73, and a thermometer (thermistor) 78 provided inside the measuring chamber 71. The thermometer 78 used has a temperature resolution of approximately 0.01°C. In this specification, the amount of steam generated refers to the total amount measured from the "start of heat generation" of the heating element 40 up to 10 minutes later.

[0090] Furthermore, the heating element 40 may also contain fragrance components described in, for example, "Synthetic Fragrance Chemistry and Product Knowledge" (by Motoichi Indo, Chemical Daily Co., Ltd.), to the extent that it does not interfere with the effects of the present invention.

[0091] [Packaging bag composition] As shown in Figure 1, the packaging bag 100 according to this embodiment is configured to package the eye mask 1 in an airtight state. Furthermore, the packaging bag 100 is an oxygen-barrier bag that can deform to follow changes in the volume of the gas inside. In this embodiment, the packaged eye mask 200 is configured so that the eye mask 1 is sealed in the packaging bag 100 in a state where it is folded in half with respect to the vertical center line 23, as shown in Figure 1. That is, in this embodiment, the pair of ear attachment parts 30 are sealed in the packaging bag 100 without being folded inward of the eye mask 1 (i.e., without folding the eye mask 1 into quarters), with the ear attachment parts 30 overlapping each other. However, as mentioned above, the ear attachment parts 30 are a part of the eye mask 1 that has lower rigidity (higher flexibility) compared to the covering part 20. Therefore, when the eye mask 1 is sealed in the packaging bag 100 without folding the pair of ear attachment parts 30 inward of the eye mask 1, distortion and warping are particularly likely to occur in the ear attachment parts 30. In this embodiment, despite the packaging configuration being such that distortion and wrinkles are likely to occur in the ear attachment portion 30, the packaging bag 100 is configured, as will be described later, to reduce the possibility of distortion and wrinkles occurring in the eye mask 1, particularly the ear attachment portion 30, when the eye mask 1 is sealed in the packaging bag 100, by keeping the ratio of the inner surface area of ​​the packaging bag 100 in a sealed state to the weight of the oxidizable metal within a predetermined range.

[0092] In the above explanation, it was described that the eye mask 1 is enclosed in the packaging bag 100 in a folded state with respect to the vertical center line 23, but the explanation is not limited to this. For example, the eye mask 1 may be enclosed in the packaging bag 100 in an accordion-like folded state, or the eye mask 1 may be enclosed in the packaging bag 100 without being folded.

[0093] The packaging bag 100 has an internal space, and is configured to enclose the eye mask 1 within this internal space. Here, it is preferable that the surface area of ​​the inner surface of the packaging bag 100 is an area that can effectively carry out the oxidation reaction of the heat-generating element 40 by the oxidizable metal. Specifically, the surface area of ​​the inner surface of the packaging bag 100 is 250 cm². 2It is preferably as described above, 300 cm 2 or more. Also, from the viewpoint of preventing disadvantages caused by excessive expansion of the area of the packaging bag 100 (for example, disadvantages such as the packaging bag 100 and the eye mask 1 cannot be sufficiently adhered, and wrinkles occur in the eye mask 1), the area of the inner surface of the packaging bag 100 is 750 cm 2 or less, and preferably 450 cm 2 or less. That is, the area of the inner surface of the packaging bag 100 is 250 cm 2 or more and 750 cm 2 or less, and preferably 300 cm 2 or more and 450 cm 2 or less.

[0094] Note that the "area of the inner surface of the packaging bag" refers to the total area of the inner surfaces forming the internal space of the packaging bag 100. In the packaging bag 100 of the present embodiment, as shown in FIG. 1, it has an inner region 110 capable of enclosing the eye mask 1 and an outer region 120 provided outside the inner region 110, and the entire outer region 120 is sealed by heat fusion. Therefore, the area of the inner surface of the packaging bag 100 (the area of the inner region 110) according to the present embodiment is obtained by subtracting the total area of the outer region 120 (heat fusion portion) from the area of the outer surface of the packaging bag 100.

[0095] Here, the packaged eye mask 200 according to the present embodiment adjusts both values so that the ratio of the area (cm 2 ) of the inner surface in the sealed state of the packaging bag 100 to the weight (g) of the oxidizable metal is within a predetermined range, thereby promoting the oxidation reaction of the oxidizable metal contained in the heating element 40 of the eye mask 1, and is configured to adhere the packaging bag 100 and the eye mask 1. According to the packaged eye mask 200 having such a configuration, it is possible to suppress the movement of the eye mask 1 in the packaging bag 100, so it is possible to reduce the possibility of distortion, wrinkles, etc. occurring in the eye mask 1 during transportation, storage, display, etc. The ratio of the area of the inner surface of the packaging bag 100 in the sealed state to the weight of the oxidizable metal will be described in detail later.

[0096] Furthermore, the oxygen permeability of the packaging bag 100 is preferably such that the eye mask 1, sealed inside the bag, does not come into contact with oxygen in the air. Specifically, the oxygen permeability of the packaging bag 100 is preferably 10 cm³. 3 ·mm / (m 2 Preferably less than 3cm (day·MPa), 3 ·mm / (m 2 It is more preferable that it be less than or equal to (day·MPa), and 0.3cm 3 ·mm / (m 2 It is even more preferable that it be less than or equal to (day·MPa), and 0.01cm 3 ·mm / (m 2 It is even more preferable that the oxygen permeability is less than or equal to (day·MPa). Specifically, materials that satisfy the above conditions include films such as ethylene-vinyl alcohol copolymers and polyacrylonitrile, or films on which ceramic or aluminum has been vapor-deposited. The oxygen permeability was measured using a testing machine conforming to JIS L 1096 "8.21. Method for measuring rigidity and flexibility" and JIS K 7126-2 "Isobar method".

[0097] [Ratio of the inner surface area of ​​the sealed packaging bag to the weight of the oxidizable metal] The ratio of the inner surface area of ​​the sealed packaging bag 100 to the weight of the oxidizable metal is preferably 300 or less, more preferably 280 or less, and even more preferably 250 or less, from the viewpoint of improving the oxidation reaction by the heating element 40 and improving the degree of contact between the packaging bag 100 and the eye mask 1. On the other hand, from the viewpoint of preventing the above-mentioned problems caused by an excessive increase in the weight (content) of the oxidizable metal contained in the eye mask 1 and providing the wearer with even greater comfort, the ratio of the inner surface area of ​​the sealed packaging bag 100 to the weight of the oxidizable metal is preferably 50 or more, preferably 80 or more, and even more preferably 100 or more. That is, the ratio of the inner surface area of ​​the sealed packaging bag 100 to the weight of the oxidizable metal is preferably 50 or more and 300 or less, more preferably 80 or more and 280 or less, and even more preferably 100 or more and 250 or less.

[0098] Here, "the ratio of the inner surface area of ​​the sealed packaging bag to the weight of the oxidizable metal" is the weight (g) of the oxidizable metal contained in the eye mask 1 enclosed in the packaging bag 100 and the inner surface area (cm²) of the packaging bag 100 as described above. 2 This is determined by the ratio of ). Note that "weight of oxidizable metal" refers to the total weight of oxidizable metal contained in all heating elements 40 of the eye mask 1. Furthermore, as mentioned above, if multiple eye masks 1 are enclosed in the packaging bag 100, it refers to the total weight of oxidizable metal contained in all heating elements 40 of the multiple eye masks 1.

[0099] The values ​​mentioned above can be achieved, for example, by the following methods (1) to (3). (1) A method for adjusting the internal dimensions (volume) of the packaging bag 100. (2) A method for adjusting the content of oxidizable metals. (3) A method that combines (1) and (2) above.

[0100] [(1) Method for adjusting the dimensions of the internal space of the packaging bag 100] As an example of a method for adjusting the dimensions of the internal space of the packaging bag 100 as described in (1) above, one can increase or decrease the area of ​​the inner region 110 of the packaging bag 100 (value of the internal area) by increasing or decreasing the range of the heat-sealed portion of the packaging bag 100, thereby making the ratio of the inner surface area of ​​the packaging bag 100 in a sealed state to the weight of the oxidizable metal a desired value.

[0101] [(2) Method for adjusting the content of oxidizable metals] As an example of a method for adjusting the content of the oxidizable metal described in (2) above, one can increase or decrease the content of the oxidizable metal contained in the heating layer 45 of the heating element 40 described above, thereby making the ratio of the inner surface area of ​​the sealed packaging bag 100 to the weight of the oxidizable metal a desired value.

[0102] [(3) A method combining the above (1) and (2)] By arbitrarily combining the method of adjusting the surface area of ​​the inner surface of the packaging bag 100 as described in (1) above and the method of adjusting the content of the oxidizable metal as described in (2) above, it is also possible to adjust the ratio of the inner surface area of ​​the packaging bag 100 in a sealed state to the weight of the oxidizable metal to a desired value.

[0103] [How to use a pre-packaged eye mask] Next, the method of using the packaged eye mask 200 according to this embodiment will be described. When using the eye mask 1 according to this embodiment, first the wearer opens the packaging bag 100 of the packaged eye mask 200 and takes out the eye mask 1. As a result, the heating element 40 comes into contact with the air, and the heating element 40 starts to generate heat due to the oxidation reaction of the oxidizable metal contained in the heating element 40.

[0104] After removing the eye mask 1 from the packaging bag 100, the wearer grasps, for example, one of the side edges 13 (the side edge located on the left in Figure 2) in a plan view of the eye mask 1 (the state in Figure 2), and inserts their right ear through the ear hole 31 of one of the ear attachment parts 30 (the ear attachment part located on the left in Figure 2). Then, with the right ear inserted through the ear hole 31 of one of the ear attachment parts 30, the wearer grasps the vicinity of the other side edge 13 (the side edge located on the right in Figure 2) of the eye mask 1 (see Figure 10(a)), and inserts their left ear through the ear hole 31 of the other ear attachment part 30 (the ear attachment part located on the right in Figure 2). This ensures that the wearer's eyes, the area around their eyes, and their temples are covered by the covering part 20 (see Figure 10(b)).

[0105] Then, with the wearer's eyes, the area around their eyes, and their temples covered by the covering portion 20, the heating layer 45 of the heating element 40 generates heat, causing the water in the water-retaining layer 44 of the heating element 40 to evaporate and become steam (warm steam) at a predetermined temperature, which is supplied to the wearer's eyes and the area around their eyes via the first sheet 41 and the inner sheet 50. In addition, the heat generated from the heating element 40 is conducted to the area of ​​the covering portion 20 facing the wearer's eyes and the area around their eyes, and the heat conducted to the area of ​​the covering portion 20 facing the wearer's eyes and the area around their eyes is then conducted to the wearer's eyes and the area around their eyes. As a result, the wearer's eyes and the area around their eyes are warmed, providing comfort to the wearer regardless of face size.

[0106] Furthermore, since the covering portion 20 according to this embodiment covers the wearer's temples, heat conducted to the area of ​​the covering portion 20 facing the wearer's eyes and the area around the eyes is conducted to the area of ​​the covering portion 20 facing the wearer's temples, and heat conducted to the area of ​​the covering portion 20 facing the wearer's temples is conducted to the wearer's temples. As a result, the wearer's temples can be warmed, improving the comfort provided to the wearer.

[0107] [Advantages of the eye mask according to this embodiment] Thus, the packaged eye mask 200 according to this embodiment comprises an eye mask 1 that generates heat due to the oxidation reaction of an oxidizable metal, and a packaging bag 100 capable of sealing the eye mask 1. The packaging bag 100 is an oxygen-barrier bag that can deform to follow changes in the volume of the gas inside, and the inner surface area of ​​the packaging bag 100 is 250 cm². 2 Over 470cm 2 The following conditions apply, where the ratio of the surface area of ​​the inner surface of the sealed packaging bag 100 to the weight of the oxidizable metal is 300 or less.

[0108] With a pre-packaged eye mask 200 having such a configuration, the oxidizable metal contained in the eye mask 1 sealed in the packaging bag 100 causes the air (oxygen) in the internal space of the packaging bag 100 to be used in the iron oxidation reaction. This ensures that the packaging bag 100 and the eye mask 1 are tightly sealed together, reducing the possibility of distortion or wrinkles occurring in the eye mask 1 when the packaging bag 100 is moved.

[0109] Furthermore, in the packaged eye mask 200 according to this embodiment, the ratio of the inner surface area of ​​the sealed packaging bag 100 to the weight of the oxidizable metal is configured to be between 168.8 and 246.7. By configuring the ratio of the inner surface area of ​​the sealed packaging bag 100 to the weight of the oxidizable metal to be within a predetermined range, it is possible to reduce the possibility of distortion or wrinkles occurring in the eye mask 1 when the packaging bag 100 is moved, and it is also possible to maintain the heating element 40 at an appropriate temperature when the eye mask 1 is worn, thereby improving the comfort provided to the wearer.

[0110] [Differentiation] The eye mask according to the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the technical concept of the present invention.

[0111] Furthermore, although the above-described embodiment was explained assuming that the covering portion 20 has a nasal passage portion 24, the invention is not limited to this, and a configuration without a nasal passage portion 24 is also possible.

[0112] Furthermore, although the above-described embodiment was explained assuming that the heating element 40 has a water-retaining layer 44, it is not limited to this, and a configuration without a water-retaining layer 44 is also possible, for example, as in a powder-type heating element (hand warmer).

[0113] It is clear from the claims that the above-mentioned modifications are included within the scope of the present invention. [Examples]

[0114] The present invention will be described in detail below based on examples, but these examples are not intended to limit the object of the present invention.

[0115] [Example 1] A packaged eye mask according to Example 1 was prepared by following the procedure below.

[0116] [Manufacturing of heating elements] First, an aqueous solution was prepared by dissolving salt as an electrolyte and a thickener (Labor Gum GS-C: manufactured by DSP Gokyo Food & Chemical Co., Ltd.) in water (tap water). Iron powder (reduced iron powder: manufactured by DOWA IP Creation Co., Ltd.) as the oxidizable metal was added and stirred. Further, activated carbon (Carborafin: manufactured by Osaka Gas Chemical Co., Ltd.) was added as a reaction accelerator and stirred thoroughly until uniformly dispersed to obtain a paste-like exothermic composition. The salts used were sodium chloride (Japanese Pharmacopoeia sodium chloride: manufactured by Tomita Pharmaceutical Co., Ltd.), tripotassium phosphate (food additive tripotassium phosphate: manufactured by Yoneyama Chemical Industry Co., Ltd.), and potassium hydroxide (liquid caustic potash (48%): manufactured by Asahi Glass Co., Ltd.). The proportions of these were 55.2% iron powder, 34.2% water, 4.4% activated carbon, 0.1% thickener (xanthan gum), 1.0% tripotassium phosphate, 0.1% potassium hydroxide, and 5.0% sodium chloride.

[0117] Subsequently, the aforementioned paste-like heat-generating composition was applied to a polyethylene-laminated tissue paper at a basis weight of 745 g / m². 2 Then, a coating is applied, and subsequently, wood pulp paper (basis weight 20 g / m²) is placed on the heat-generating composition. 2(Manufactured by Ino Paper Co., Ltd.) and superabsorbent polymer (spherical, average particle size 300 μm, Aqualic CA, manufactured by Nippon Shokubai Co., Ltd., basis weight 70 g / m²) 2 ) and paper made from wood pulp (basis weight 30g / m²) 2 A polymer sheet (with an air permeability of 2 seconds / 100 mL when absorbing 10-45% by mass of water, the maximum water absorption capacity) was laminated to obtain a laminate consisting of a base layer 43, a heating layer 45, and a water-retaining layer 44. This laminate (base layer 43, heating layer 45, and water-retaining layer 44) was cut to a size of 49 mm x 49 mm. Next, the laminate (base layer 43, heating layer 45, and water-retaining layer 44) was sandwiched between a breathable first sheet 41 and a non-breathable second sheet 42, both cut to 63 mm x 63 mm, and the four sides of these sheets were heat-sealed to obtain a heating element 40 in which the base layer 43, heating layer 45, and water-retaining layer 44 were housed in a bag made of the first sheet 41 and the second sheet 42. The weight of oxidizable metal (iron powder) contained in the heating element 40 prepared here was 1.28 g.

[0118] [Making an eye mask] First, inner sheet 50 and outer sheet 60 with the shapes shown in Figures 2 to 5 were fabricated. The inner sheet 50 was made of polyethylene terephthalate, polypropylene, and polyethylene nonwoven fabric (air-through method, basis weight 60 g / m²). 2 The outer sheet 60 is made of polyethylene terephthalate nonwoven fabric (needle punch method, basis weight 90 g / m²). 2 The inner sheet 50 and outer sheet 60 were fabricated under an oxygen atmosphere.

[0119] Next, with the heating element 40 prepared as described above sandwiched between the inner sheet 50 and the outer sheet 60, the peripheral edges and the vicinity of the vertical center line 23 of the inner sheet 50 and the outer sheet 60 were joined together to create the eye mask 1. Two heating elements 40 were placed in total, one on each side of the covering portion 20, separated by the vertical center line 23 of the covering portion 20. The eye mask 1 was prepared in an oxygen-free atmosphere.

[0120] [Creating packaging bags] For packaging bag 100, the oxygen permeability is 0 cm². 3 ·mm / (m 2 A three-side seal bag (manufactured by TOPPAN Corporation or Seisan Nipponsha Co., Ltd.) with a layer of MPa (day) was used.

[0121] Next, the eye mask 1 prepared as described above was sealed in the packaging bag 100 described above, and then the unheated side of the packaging bag 100 was heat-sealed to create the packaged eye mask according to Example 1. The packaged eye mask according to Example 1 was prepared under an oxygen atmosphere. In addition, in the packaged eye mask according to Example 1, only one eye mask 1 was sealed in each packaging bag 100.

[0122] [Example 2] In the packaged eye mask according to Example 2, the same packaging bag 100 as in Example 1 was used, and the amount of iron powder added to the heating element 40 was changed during the preparation stage so that the weight of the oxidizable metal present in the eye mask 1 was 1.39 g.

[0123] [Example 3] In the packaged eye mask according to Example 3, the same packaging bag 100 as in Example 1 was used, and the amount of iron powder added to the heating element 40 was changed during the preparation stage so that the weight of the oxidizable metal present in the eye mask 1 was 1.51 g.

[0124] [Example 4] In the packaged eye mask according to Example 4, the same packaging bag 100 as in Example 1 was used, and the amount of iron powder added during the preparation of the heating element 40 was changed so that the weight of the oxidizable metal present in the eye mask 1 was 1.62 g.

[0125] [Example 5] In the packaged eye mask according to Example 5, the same packaging bag 100 as in Example 1 was used, and the amount of iron powder added during the preparation of the heating element 40 was changed so that the weight of the oxidizable metal present in the eye mask 1 was 1.86 g.

[0126] [Example 6] In the packaged eye mask according to Example 6, the same packaging bag 100 as in Example 1 was used, and the amount of iron powder added during the preparation of the heating element 40 was changed so that the weight of the oxidizable metal present in the eye mask 1 was 1.97 g.

[0127] [Example 7] In the packaged eye mask according to Example 7, the same packaging bag 100 as in Example 1 was used, and the amount of iron powder added to the heating element 40 was changed during the preparation stage so that the weight of the oxidizable metal present in the eye mask 1 was 2.2 g.

[0128] [Example 8] In the packaged eye mask according to Example 8, the same packaging bag 100 as in Example 1 was used, and the amount of iron powder added to the heating element 40 was changed during the preparation stage so that the weight of the oxidizable metal present in the eye mask 1 was 2.9 g.

[0129] [Example 9] In the packaged eye mask according to Example 9, the same packaging bag 100 as in Example 1 was used, and the amount of iron powder added during the preparation of the heating element 40 was changed so that the weight of the oxidizable metal present in the eye mask 1 was 5.34 g.

[0130] [Example 10] In the packaged eye mask according to Example 10, the amount of iron powder added to the heating element 40 was changed during the manufacturing stage so that the weight of the oxidizable metal present in the eye mask 1 was 1.97 g, and the inner surface area of ​​the packaging bag 100 was 442 cm². 2 The dimensions of packaging bag 100 were changed accordingly.

[0131] [Comparative Example 1] In the packaged eye mask of Comparative Example 1, the same packaging bag 100 as in Example 1 was used, and the amount of iron powder added to the heating element 40 was changed during the preparation stage so that the weight of the oxidizable metal present in the eye mask 1 was 1.16 g.

[0132] [Comparative Example 2] In the packaged eye mask according to Comparative Example 2, the same packaging bag 100 as in Example 1 was used. The eye mask 1 according to Example 6 described above was divided in half horizontally with respect to the vertical center line 23, and one half was sealed in the packaging bag 100. That is, the weight of the oxidizable metal contained in the eye mask 1 according to Comparative Example 2 was 0.99 g.

[0133] [Comparative Example 3] In the packaged eye mask according to Comparative Example 3, the amount of iron powder was changed during the manufacturing stage of the heating element 40 so that the weight of the oxidizable metal present in the eye mask 1 was 1.97 g, and the inner surface area of ​​the packaging bag 100 was 475 cm². 2 The dimensions of packaging bag 100 were changed accordingly.

[0134] [Comparative Example 4] In the packaged eye mask according to Comparative Example 4, the amount of iron powder added to the heating element 40 was changed during the manufacturing stage so that the weight of the oxidizable metal present in the eye mask 1 was 1.97 g, and the inner surface area of ​​the packaging bag 100 was 814 cm². 2 The dimensions of packaging bag 100 were changed accordingly.

[0135] [Comparative Example 5] In the packaged eye mask according to Comparative Example 5, the amount of iron powder added to the heating element 40 was changed during the manufacturing stage so that the weight of the oxidizable metal present in the eye mask 1 was 1.97 g, and the inner surface area of ​​the packaging bag 100 was 242 cm². 2 The dimensions of packaging bag 100 were changed accordingly.

[0136] [Test 1] Test 1 was performed to evaluate whether or not wrinkles occurred in the eye mask 1 inside the packaged eye masks of Examples 1 to 10 and Comparative Examples 1 to 5 when the packaging bag 100 was moved.

[0137] First, the packaged eye masks according to Examples 1 to 10 and Comparative Examples 1 to 5 were placed on a flat surface for one week to allow the oxidation reaction of the oxidizable metal contained in the eye mask 1 to proceed, thereby ensuring tight contact between the packaging bag 100 and the eye mask 1. Then, for each packaged eye mask, the corner of the packaging bag 100 (the corner of the heat-sealed part) was grasped without gripping the eye mask 1, and the bag was vibrated up and down three times. Next, the packaging bag 100 of each packaged eye mask was opened, and the appearance of the enclosed eye mask 1 was visually inspected for any wrinkles. The results are shown in Table 1. The wrinkles of the eye masks in Test 1 were evaluated according to the following evaluation criteria.

[0138] [Evaluation Criteria for Test 1] ○: No wrinkles △: Slightly wrinkled ×: Wrinkled

[0139] [Table 1]

[0140] [Evaluation of Test 1] As shown in Table 1, in the case of the pre-packaged eye masks of Examples 1 to 10, it was found that even when the packaging bag 100 was vibrated, no wrinkles occurred in the appearance of the eye mask 1 sealed inside, and this effect was particularly pronounced in Examples 3 to 10. On the other hand, in the case of the pre-packaged eye masks of Comparative Examples 1 to 5, it was found that when the packaging bag 100 was vibrated, wrinkles occurred in the appearance of the eye mask 1 sealed inside, and the aesthetic appearance of the eye mask 1 when in use was reduced.

[0141] [Exam 2] Next, for the packaged eye masks according to Examples 1 to 9 and Comparative Example 1, the following Test 2 was conducted to evaluate the comfort felt by the wearer when the ratio of the inner surface area of ​​the sealed packaging bag to the weight of the oxidizable metal was changed by changing the weight of the oxidizable metal.

[0142] First, the packaging bags 100 of the pre-packaged eye masks according to Examples 1-9 and Comparative Example 1 were opened, and the maximum temperature and duration of heating above 45°C were measured for each of the heating elements 40 contained in the enclosed eye masks 1. The measurement results are shown in Table 2. Note that the method for measuring the maximum temperature and duration of heating above 45°C for each eye mask 1 can be the same as the method for measuring the maximum temperature and duration of heating above 45°C for the heating element 40 described in this specification, so a detailed explanation is omitted.

[0143] Furthermore, for each pre-packaged eye mask, the comfort level felt by the wearer, as determined by the maximum temperature of the heating element 40 in eye mask 1 and the duration of heating at 45°C or higher, was evaluated according to the following evaluation criteria.

[0144] [Evaluation Criteria for Test 2] ◎: Excellent ○: Good ×: Bad

[0145] [Table 2] TIFF2026092451000003.tif54170

[0146] [Evaluation of Exam 2] As shown in Table 2, in the case of the pre-packaged eye masks of Examples 1 to 9, the warmth provided to the wearer was good, and the duration of this warmth was also good, making it clear that the wearer felt comfortable. This effect was particularly pronounced in Examples 3 to 7. On the other hand, in the case of the pre-packaged eye mask of Comparative Example 1, the maximum temperature of the heating element was low, and the duration of the heating element's heat generation above 45°C was short, making it clear that the wearer did not feel comfortable.

[0147] [Exam 3] Next, for the packaged eye masks according to Examples 1 and 10 and Comparative Examples 3 to 5, the following Test 3 was conducted to evaluate in more detail whether wrinkles occurred in the eye mask 1 inside when the packaged bag 100 was moved, by changing the area of ​​the inner surface of the packaged bag, thereby changing the ratio of the inner surface area of ​​the packaged bag in a sealed state to the weight of the oxidizable metal.

[0148] First, three pre-packaged eye masks were prepared for each of Examples 1 and 10, and Comparative Examples 3 to 5, and classified into groups A to C according to the test content. Then, each pre-packaged eye mask was placed on a flat surface for one week to allow the oxidation reaction of the oxidizable metal contained in the eye mask 1 to proceed, thereby ensuring tight adhesion between the packaging bag 100 and the eye mask 1. Subsequently, the following tests were performed for each of the groups A to C. For each pre-packaged eye mask classified into Group A, the corner of the packaging bag 100 (the corner of the heat-sealed part) was grasped without gripping the eye mask 1, and the bag was vibrated up and down three times. Next, the packaging bag 100 for each pre-packaged eye mask classified into Group A was opened, and the appearance of the enclosed eye mask 1 was visually checked for any wrinkles. The results of this check are shown in Table 3. Furthermore, each pre-packaged eye mask classified as Group B was subjected to a drop test three times from a platform 75 cm high. Next, each pre-packaged eye mask in Group B was opened, and the eye mask 1 inside was visually inspected for any wrinkles or damage. The results of this inspection are shown in Table 3. Furthermore, each pre-packaged eye mask classified as Group C was left undisturbed for three days with its top and bottom reversed. Next, the packaging bag 100 of each pre-packaged eye mask classified as Group C was opened, and the appearance of the enclosed eye mask 1 was visually inspected for any wrinkles. The results of this inspection are shown in Table 3. In this test, "top and bottom reversed" refers to a state in which the ear attachment part 30 is positioned vertically below the main body part 10. Furthermore, the wrinkles in the eye mask during Test 3 were evaluated according to the following evaluation criteria.

[0149] [Evaluation Criteria for Test 3] ○: No wrinkles △: Slightly wrinkled ×: Wrinkled

[0150] [Table 3] TIFF2026092451000004.tif24170

[0151] [Evaluation of Exam 3] As shown in Table 3, in the case of the packaged eye masks of Examples 1 and 10, it was found that no distortion or wrinkles occurred in the appearance of the eye mask 1 sealed inside in any of the tests related to groups A to C. Therefore, it was found that in the packaged eye masks of Examples 1 and 10, by changing the area of ​​the inner surface of the packaging bag 100, it is possible to further reduce the possibility of distortion or wrinkles occurring in the eye mask 1 while it is sealed in the packaging bag 100, and to improve the aesthetic appearance of the eye mask 1 when it is in use. On the other hand, as shown in Table 3, in the case of the packaged eye masks related to Comparative Examples 3 to 5, with the exception of Comparative Example 3, it was found that wrinkles occurred in the appearance of the eye mask 1 sealed inside in all tests related to groups A to C, resulting in a decrease in the aesthetic appearance of the eye mask 1 when in use. Furthermore, in the case of Comparative Example 3, it was found that wrinkles occurred in the appearance of the eye mask 1 sealed inside in at least the tests related to groups A and B, resulting in a decrease in the aesthetic appearance of the eye mask 1 when in use. [Explanation of Symbols]

[0152] 1: Eye mask 10: Main body 11: Upper edge 12: Lower edge 13: Side edge 20: Covering part 21 :Side edge 22: Central part 23: Vertical center line 24: Nasal passage 30: Ear attachment part 31:Ear insertion hole 40: Heating element 41: Sheet 1 42: Second seat 43: Base material layer 44: Spare aqueduct 45: Heating layer 50: Inner sheet 60: Exterior sheet 70: Measuring device 71:Measurement room 72:Inflow channel 73:Outflow channel 74: Inlet temperature and humidity meter 75: Inlet flow meter 76:Outlet temperature and humidity meter 77: Outlet flow meter 78: Thermometer 100: Packaging bag 110: Inner area 120 :Outer area 200: Pre-packaged eye masks HM: Human head model

Claims

1. An eye mask that generates heat through the oxidation reaction of an oxidizable metal, A packaging bag capable of sealing the aforementioned eye mask, Equipped with, The aforementioned packaging bag is an oxygen-barrier bag that can deform to follow changes in the volume of the gas inside, The inner surface area of ​​the aforementioned packaging bag is 250 cm². 2 Over 470 cm 2 The following, The ratio of the inner surface area of ​​the sealed packaging bag to the weight of the oxidizable metal is 300 or less. Pre-packaged eye mask.

2. The weight of the oxidizable metal is 1.2 g or more. The packaged eye mask according to claim 1.

3. The aforementioned packaging bag has an oxygen permeability of 10 cm². ３ mm / (m) ２ Formed from materials with a pressure of (day / MPa) or less. A packaged eye mask according to claim 1 or 2.

4. The aforementioned eye mask has an ear-attachment portion with a rigidity of 5 mm or more and 125 mm or less. A packaged eye mask according to claim 1 or 2.

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