JP7655010B2 - Pouch and face mask provided with the pouch - Google Patents

Description

The present disclosure relates to a pouch and a face mask in which the pouch is provided.

In order to prevent dryness in the oral cavity and nasal cavity, a technique is known in which the mask itself contains moisture or the mask is provided with a retaining material that retains moisture. Patent Document 1 discloses a configuration in which the mask contains a water-absorbent core that can retain moisture for a long period of time.

JP 2007-319421 A

In the above mask, the absorbent core is impregnated with the moisture-retaining liquid and then housed in the housing that constitutes the mask. In this case, there is a risk that the moisture-retaining liquid will leak from the absorbent core before the absorbent core is housed in the housing of the mask.

The pouch according to the present invention includes an inner pouch and an outer pouch provided outside the inner pouch, the inner pouch having a first discharge means for discharging liquid held in the storage space of the inner pouch to the outside, and the outer pouch having a second discharge means, different from the first discharge means, for discharging the liquid to the outside of the outer pouch.

The pouch can efficiently release the liquid held in the storage space.

FIG. 2 is a front schematic view of the pouch of the first embodiment. 2 is a schematic cross-sectional view of the pouch of FIG. 1 taken along line D2-D2. FIG. 3 is a partially enlarged view of the pouch of FIG. 2 . FIG. 1 shows the flow of liquid within a pouch. A diagram showing the pouch attached to a face mask. FIG. 2 shows one state of the face mask when first starting to use it. 1 is a table showing the results of the first comparative test. FIG. 6 is a schematic cross-sectional view of a pouch according to a second embodiment. FIG. 9 is a partial enlarged view of the pouch of FIG. 8 . 13 is a table showing the results of the second comparative test. FIG. 13 is a diagram showing an example of an inner pouch of a modified example. FIG. 13 is a diagram showing an example of an inner pouch of a modified example.

(Examples of possible forms of the pouch and the face mask in which the pouch is provided)
(1) A pouch according to the present invention includes an inner pouch and an outer pouch provided outside the inner pouch, the inner pouch having a first release means for releasing a liquid held in a storage space of the inner pouch to the outside, and the outer pouch having a second release means, different from the first release means, for releasing the liquid to the outside of the outer pouch.
According to this pouch, the pouch is composed of an inner pouch having a first releasing means and an outer pouch having a second releasing means. By being composed of the inner pouch and the outer pouch, each of which has a different releasing means, the liquid held in the storage space is suitably released from the inner pouch and the outer pouch.

(2) According to one example of the pouch, the first discharging means discharges the liquid to the outside as an internal pressure of the storage space increases.
According to this pouch, the liquid can be discharged from the inner pouch by the first discharging means without contacting the inner pouch by increasing the internal pressure of the storage space, which reduces contact between the liquid and the user, for example, when first using the pouch.

(3) According to one example of the pouch, the inner pouch is formed of a plurality of inner sheets, and at least a portion of the inner seal portion joining the plurality of inner sheets has an easy-peel structure.
According to this pouch, the first releasing means can be easily formed due to its easy-peel structure.

(4) According to one example of the pouch, the outer pouch is formed by an outer sheet, the outer sheet includes a plurality of outer layers, and at least one of the outer layers includes a paper layer.
According to this pouch, since it includes a paper layer, the amount of liquid released by the second releasing means can be suitably adjusted.

(5) According to one example of the pouch, the second release means includes an opening provided in a stacking direction of at least a portion of the multiple outer layers of the outer sheet.
According to this pouch, the second releasing means is an opening provided in the stacking direction of the outer sheet, so that the liquid can be released suitably.

(6) According to one example of the pouch, the opening is configured to penetrate through the outer sheet.
According to this pouch, the liquid can be suitably discharged by the second discharging means.

(7) According to one example of the pouch, the second discharging means discharges a smaller amount of liquid per unit time than the first discharging means.
According to this pouch, the second release means releases liquid more slowly than the first release means, so that the pouch can release liquid for a longer period of time.

(8) A face mask according to the present invention includes the pouch.
This face mask includes a pouch composed of an inner pouch having a first releasing means and an outer pouch having a second releasing means, and therefore can suppress dryness in the user's oral cavity and nasal cavity.

(9) According to one example of the face mask, the face mask includes a holding portion that holds the pouch, and the first release means releases liquid in the storage space while the pouch is held in the holding portion.
According to this face mask, since the first release means can release liquid within the holding portion of the mask, the user's hands are less likely to get wet when starting to use the face mask.

First Embodiment
A pouch 10 according to a first embodiment and a face mask 100 (see FIG. 5) in which the pouch 10 is provided will be described with reference to FIGS. 1 to 7. The pouch 10 includes at least an inner pouch 20. Preferably, the pouch 10 includes an outer pouch 40 provided outside the inner pouch 20. The pouch 10 forms a storage space S inside. The storage space S1 of the inner pouch 20 holds a liquid. The liquid is, for example, water. The storage space S2 of the outer pouch 40 holds the inner pouch 20 and the liquid released from the inner pouch 20.

The inner pouch 20 is composed of an inner sheet 21 including multiple inner layers. The inner pouch 20 may be composed of two or more inner sheets 21 stacked together, or may be composed by folding one inner sheet 21. The inner pouch 20 of this embodiment is composed of two inner sheets 21 stacked together. The shape and dimensions of the inner pouch 20 are configured so that it does not burden the user's breathing when attached to the face mask 100 and a storage space S1 capable of holding a suitable amount of liquid is formed. In one example, the shape of the inner pouch 20 is rectangular or approximately rectangular when viewed from the front. The dimensions of the inner pouch 20 are, for example, 60 mm in the longitudinal direction and 45 mm in the lateral direction.

The inner sheets 21 constituting the inner pouch 20 are joined by the inner seal portion 30. The storage space S1 is a space surrounded by the two inner sheets 21 and the inner seal portion 30. The inner seal portion 30 includes a plurality of inner seal portions according to the shape of the inner pouch 20. In this embodiment, the inner seal portion 30 includes a first inner seal portion 31, a second inner seal portion 32, a third inner seal portion 33, and a fourth inner seal portion 34 corresponding to the shape of the inner pouch 20. When the shape of the inner pouch 20 is circular or triangular, at least one of the first inner seal 31 to the fourth inner seal 34 can be omitted. When the shape of the inner pouch 20 is a polygonal shape with pentagons or more sides, an inner seal portion is further included.

The first inner seal portion 31 and the second inner seal portion 32 are provided along the longitudinal direction of the inner pouch 20. The third inner seal portion 33 and the fourth inner seal portion 34 are provided along the lateral direction of the inner pouch 20.

The inner edge 31A of the first inner seal portion 31, the inner edge 32A of the second inner seal portion 32, the inner edge 33A of the third inner seal portion 33, and the inner edge 34A of the fourth inner seal portion 34 define the inner boundary of the storage space S1. The outer edge 31B of the first inner seal portion 31, the outer edge 32B of the second inner seal portion 32, the outer edge 33B of the third inner seal portion 33, and the outer edge 34B of the fourth inner seal portion 34 define the outer boundary of the inner pouch 20. The distance between the inner edge 31A and the outer edge 31B is referred to as the "first inner seal width". The distance between the inner edge 32A and the outer edge 32B is referred to as the "second inner seal width". The distance between the inner edge 33A and the outer edge 33B is referred to as the "third inner seal width". The distance between the inner edge 34A and the outer edge 34B is referred to as the "fourth inner seal width". The first to fourth inner seal widths are set according to the required seal strength. The first to fourth inner seal widths may be the same, or at least one of them may be different. In one example, the first to fourth inner seal widths are 5 mm.

The seal strength of the inner seal portion 30 is set arbitrarily. The seal strength may be the same in all of the first inner seal portion 31 to the fourth inner seal portion 34, or the seal strength of at least one inner seal portion 30 may be different from the seal strength of the other inner seal portions 30. The seal strength of at least one inner seal portion 30 is such that it is easily peeled off when the internal pressure of the storage space S1 increases. The increase in internal pressure occurs, for example, by pressurization and heating. In one example, the range in which the seal strength of at least one inner seal portion 30 can be taken is 0.5 N/15 mm or more. In one example, the range in which the seal strength of at least one inner seal portion 30 can be taken is 10 N/15 mm or less. In one example, the seal strength of the inner seal portion 30 is 2 N/15 mm. In this embodiment, the third inner seal portion 33 and the fourth inner seal portion 34 are set so that their seal strengths are within the range of 0.5 N/15 mm to 10 N/mm. The seal strength of the first inner seal portion 31 and the second inner seal portion 32 can be set arbitrarily within the range of 0.5 N/15 mm to 130 N/15 mm, for example.

As shown in FIG. 2, the inner pouch 20 includes a first release means R1 that releases the liquid in the storage space S1 to the outside. The first release means R1 is, for example, an easy-peel structure with low seal strength set in the third inner seal portion 33 and the fourth inner seal portion 34.

The outer pouch 40 is composed of an outer sheet 41 including multiple inner layers. The outer pouch 40 may be composed of two or more outer sheets 41 stacked together, or may be composed by folding one outer sheet 41. The outer pouch 40 of this embodiment is composed of two outer sheets 41 stacked together. The shape and dimensions of the outer pouch 40 are configured so that it does not burden the user's breathing when attached to the face mask 100, and a storage space S2 capable of holding the inner pouch 20 is formed. In one example, the shape of the outer pouch 40 is rectangular or approximately rectangular when viewed from the front. The dimensions of the outer pouch 40 are, for example, 80 mm in the longitudinal direction and 60 mm in the lateral direction.

The outer sheets 41 constituting the outer pouch 40 are joined by the outer seal section 50. The storage space S2 is a space surrounded by the two outer sheets 41 and the outer seal section 50. The outer seal section 50 includes a plurality of outer seal sections depending on the shape of the outer pouch 40. In this embodiment, the outer seal section 50 includes a first outer seal section 51, a second outer seal section 52, a third outer seal section 53, and a fourth outer seal section 54. When the shape of the outer pouch 40 is circular or triangular, at least one of the first outer seal 51 to the fourth outer seal 54 can be omitted. When the shape of the outer pouch 40 is a polygonal shape with pentagons or more sides, an outer seal section is further included.

The first outer seal portion 51 and the second outer seal portion 52 are provided along the longitudinal direction of the outer pouch 40. The third outer seal portion 53 and the fourth outer seal portion 54 are provided along the lateral direction of the outer pouch 40. The inner edge 51A of the first outer seal portion 51, the inner edge 52A of the second outer seal portion 52, the inner edge 53A of the third outer seal portion 53, and the inner edge 54A of the fourth outer seal portion 54 define the inner boundary of the storage space S2. The outer edge 51B of the first outer seal portion 51, the outer edge 52B of the second outer seal portion 52, the outer edge 53B of the third outer seal portion 53, and the outer edge 54B of the fourth outer seal portion 54 define the outer boundary of the outer pouch 40. The distance between the inner edge 51A and the outer edge 51B is referred to as the "first outer seal width". The distance between the inner edge 52A and the outer edge 52B is referred to as the "second outer seal width." The distance between the inner edge 53A and the outer edge 53B is referred to as the "third outer seal width." The distance between the inner edge 54A and the outer edge 54B is referred to as the "fourth outer seal width." The first to fourth outer seal widths are set according to the required seal strength. The first to fourth outer seal widths may be the same, or at least one of them may be different. In one example, the first to fourth outer seal widths are 5 mm.

The seal strength of the outer seal portion 50 can be selected arbitrarily. The seal strength of the outer seal portion 50 is preferably determined based on the relationship between the difficulty of peeling the outer seal portion 50 and the ease of heat sealing. The seal strength of all of the first outer seal portion 51 to the fourth outer seal portion 54 may be the same, or the seal strength of at least one outer seal portion 50 may be different from the seal strength of the other outer seal portions 50. In one example, the seal strength of the outer seal portion 50 can be in a range of 50 N/15 mm or more. In one example, the seal strength of the outer seal portion 50 can be in a range of 130 N/15 mm or less. In one example, the seal strength of the outer seal portion 50 is 100 N/15 mm.

The outer pouch 40 includes a second release means R2. The second release means R2 is, for example, an opening 60 formed in the outer sheet 41. The second release means R2 is preferably configured differently from the first release means R1. The opening 60 is configured to penetrate the outer sheet 41 in the stacking direction. The opening 60 is provided in a location of the outer sheet 41 that is not joined by the outer seal portion 50. The shape of the opening 60 is, for example, a circular shape. In another example, the shape of the opening 60 is a square shape. The opening 60 is formed so as not to be equal to or larger than a predetermined opening diameter. A plurality of openings 60 are provided. The distance between each opening 60 is equal in one example. In another example, the distance between each opening 60 is different. The opening diameters of the plurality of openings 60 may be the same, or at least one of them may be different. When the outer pouch 40 is composed of a plurality of outer sheets 41, the opening 60 is formed in at least one of the outer sheets 41. Preferably, the openings 60 are formed in all of the plurality of outer sheets 41.

The configuration of the inner sheet 21 and the outer sheet 41 will be described with reference to FIG. 3. The inner sheet 21 includes at least a base material layer 22 and a sealant layer 23 as inner layers. The outer sheet 41 includes at least a base material layer 42, an intermediate layer 43, a paper layer 44, and a sealant layer 45 as outer layers. A gap is formed at least partially between the base material layer 22 of the inner sheet 21 and the sealant layer 45 of the outer sheet 41.

The substrate layer 22 is made of a material that has excellent water resistance, gas barrier properties, and heat resistance. The substrate layer 22 is, for example, a transparent vapor deposition layer. One example of the material that constitutes the substrate layer 22 is polyethylene terephthalate onto which an inorganic thin film such as aluminum oxide or silicon oxide is vapor deposited. The thickness of the substrate layer 22 can be selected arbitrarily. The thickness of the substrate layer 22 is, for example, in the range of 9 μm to 25 μm. In one example, the thickness of the substrate layer 22 is 12 μm.

The sealant layer 23 is made of a material that has excellent heat resistance, heat sealability, and impact resistance. One example of a material that makes up the sealant layer 23 is an easy peel sealant of a cohesive peeling type. The thickness of the sealant layer 23 can be selected as desired. The thickness of the sealant layer 23 is, for example, in the range of 20 μm to 60 μm. In one example, the thickness of the sealant layer 23 is 30 μm. For example, the 9501 series non-oriented co-extruded film manufactured by Toray Advanced Film Co., Ltd. can be used as the sealant layer 23.

The substrate layer 42 is made of a material that has excellent water resistance and heat resistance. The substrate layer 42 is, for example, a transparent vapor deposition layer. One example of the material that constitutes the substrate layer 42 is polyethylene terephthalate onto which an inorganic thin film such as aluminum oxide or silicon oxide is vapor deposited. The thickness of the substrate layer 42 can be selected arbitrarily. The thickness of the substrate layer 42 is, for example, in the range of 9 μm to 25 μm. In one example, the thickness of the substrate layer 42 is 12 μm.

The intermediate layer 43 is made of a material that has excellent heat resistance and impact resistance. For example, the intermediate layer 43 is made of at least one of polyethylene, polypropylene, polyester, vinyl carboxylate, and acrylic ester. The thickness of the intermediate layer 43 is, for example, in the range of 10 μm to 30 μm. In one example, the intermediate layer 43 is made of polyethylene having a thickness of 15 μm.

The paper layer 44 is made of, for example, recycled paper or non-recycled paper. Preferably, the paper layer 44 is made of greaseproof paper that has oil resistance. The basis weight contributing to the thickness of the paper layer 44 can be selected arbitrarily. The basis weight of the paper layer 44 is preferably set according to the strength of the outer pouch 40 and the required water retention. A preferred example of the minimum basis weight of the paper layer 44 is 20 g/ ^m2 . A preferred example of the maximum basis weight of the paper layer 44 is 200 g/ ^m2 . In one example, the basis weight of the paper layer 44 is 50 g/ ^m2 .

The sealant layer 45 is made of a material that has excellent heat resistance, heat sealability, and impact resistance. For example, the sealant layer 45 is made of at least one of polyethylene, polypropylene, polyester, vinyl carboxylate, and acrylic ester. The thickness of the sealant layer 45 is, for example, in the range of 10 μm to 30 μm. In one example, the sealant layer 45 is made of polyethylene having a thickness of 25 μm.

An adhesive layer (not shown) is provided between any of the layers of the inner sheet 21 and the outer sheet 41. The adhesive layer is formed, for example, from a dry lamination adhesive. The dry lamination adhesive is, for example, a two-component curing urethane adhesive, a polyester urethane adhesive, a polyether urethane adhesive, an acrylic adhesive, a polyester adhesive, a polyamide adhesive, or an epoxy adhesive. In this embodiment, the adhesive layer is made of a 2 μm polyester urethane adhesive.

The manufacturing method of the pouch 10 will be described. The manufacturing method of the pouch 10 includes at least a first step of manufacturing an inner pouch 20 that holds a liquid in the storage space S1, and a second step of manufacturing an outer pouch 40 and enclosing the inner pouch 20 in the storage space S2 of the outer pouch 40.

In the first step, the sealant layers 23 of the inner sheet 21 are heat-sealed to each other to form the inner seal portion 30. One of the first inner seal portion 31 to the fourth inner seal portion 34 to be formed in the inner seal portion 30 is left unsealed. For example, the second inner seal portion 32 to the fourth inner seal portion 34, excluding the first inner seal portion 31, are formed. An opening (not shown) connecting the storage space S1 to the outside is formed where the first inner seal portion 31 is to be formed. Liquid is injected into the storage space S1 through the opening, and the first inner seal portion 31 is formed to form the inner pouch 20 that holds the liquid in the storage space S1.

In the second step, openings 60 are formed in the outer sheet 41. The openings 60 are formed, for example, by piercing the outer sheet 41 with needles that correspond to the diameter and number of the openings 60. The sealant layers 45 of the outer sheet 41 are heat-sealed to each other to form the outer seal portion 50. One of the first outer seal portion 51 to the fourth outer seal portion 54 to be formed in the outer seal portion 50 is left unsealed. For example, the second outer seal portion 52 to the fourth outer seal portion 54, excluding the first outer seal portion 51, are formed. An opening (not shown) connecting the storage space S2 to the outside is formed in the location where the first outer seal portion 51 is to be formed. The inner pouch 20 is inserted through the opening, and the first outer seal portion 51 is formed to form the outer pouch 40 that holds the inner pouch 20 in the storage space S2, and the pouch 10 is completed.

With reference to Figure 4, an example of the flow path of the liquid in the storage space S1 until it is released to the outside of the pouch 10 will be described. When pressure is applied in the direction of the arrow A1 shown in Figure 4, the bond of the easy-peel structure part of the inner seal part 30, which is the first release means R1 of the inner pouch 20, peels off. The liquid in the storage space S1 is released into the storage space S2 along the arrow A2. The liquid in the storage space S2 is released to the outside through the opening 60, which is the second release means R2, along the arrow A3.

The area of the opening formed in the portion where the easy-peel structure peels off is larger than the opening area of the opening 60. Therefore, the second release means R2 releases less liquid per time than the first release means R1. The liquid released from the storage space S1 to the storage space S2 by the first release means R1 is released from the storage space S2 to the outside over time by the second release means R2.

As shown in FIG. 5, the face mask 100 has a structure suitable for protecting at least the mouth and nose of the user's face. The face mask 100 has a main surface portion 110 and an attachment portion 120. The material constituting the face mask 100 is, for example, a nonwoven fabric or a cloth. The main surface portion 110 includes a first main surface 111 that faces the user's mouth and nose when attached to the user, and a second main surface 112 located on the opposite side of the first main surface 111. The attachment portion 120 is configured to fix the main surface portion 110 to an appropriate position on the user's face. In one example, the attachment portion 120 is a string made of rubber provided at both ends of the main surface portion 110 in the left-right direction. The string can be engaged with the user's ears to fix the main surface portion 110 to a predetermined position on the user's face.

The face mask 100 further includes a holding section 130 that holds the pouch 10. The holding section 130 is configured, for example, in a bag shape. In this case, the holding section 130 includes an opening (not shown) that allows the pouch 10 to be inserted and removed. The holding section 130 is provided, for example, on at least one of the first main surface 111 or the second main surface 112. Preferably, the holding section 130 is provided between the first main surface 111 and the second main surface 112.

The operation of the pouch 10 of the first embodiment will be described with reference to FIG.
The user grasps the second main surface 112 of the face mask 100 and folds the main surface portion 110 so that it fits the shape of the user's face. At this time, the easy-peel structure provided on the inner seal portion 30 is peeled off, releasing the liquid from the inner pouch 20. The liquid released from the inner pouch 20 is gradually released from the opening 60 of the outer pouch 40. Since the liquid is gradually released from the pouch 10 while the user is using the face mask 100, the humidity in the user's mouth and nasal cavity is kept high and dryness is suppressed.

<First comparison test>
The first comparative test will be described. The first comparative test is a test for evaluating the appropriate configuration of the second releasing means R2 of the outer pouch 40 in the pouch 10. The first comparative test includes a retention evaluation test and a remaining rate evaluation test.

In the retention strength evaluation test, the pouch 10 was pressurized, and the amount of liquid released from the outer pouch 40 was evaluated while the liquid in the inner pouch 20 was released by the first release means R1, thereby evaluating the liquid retention strength of the pouch 10. The evaluation in the retention strength evaluation test was performed by evaluators including the inventor of the present application. When neither water dripping nor liquid adhered to the hands was observed, the evaluators rated the pouch 10 as "good". When water dripping was observed or liquid adhered to the hands was recognized, the evaluators rated the pouch 10 as "bad".

In the residual rate evaluation test, the pouch 10 was pressurized while held by the holding portion 130 of the face mask 100, and the liquid in the inner pouch 20 was released by the first release means R1, and the residual rate of the liquid after a predetermined time was evaluated. The predetermined time was set to 10 hours. The evaluator rated the pouch 10 as "good" if the residual liquid rate of the pouch 10 after 10 hours was 20 weight percent or more, and rated it as "poor" if it was less than 20 weight percent.

The first comparative test was conducted using the pouches 10 of Examples 1 to 4, the pouch 10 of Comparative Example 1, and the pouch 10 of Comparative Example 2. The configuration of each pouch 10 is described below. Note that the configuration of the inner pouch 20 is common to each pouch 10.

The inner sheet 21 and the outer sheet 41 of the pouch 10 of Examples 1 to 4, the pouch 10 of Comparative Example 1, and the pouch 10 of Comparative Example 2 are configured as follows. The base layer 22 of the inner sheet 21 is made of polyethylene terephthalate on which an inorganic thin film having a thickness of 12 μm is vapor-deposited. The sealant layer 23 of the inner sheet 21 is made of a 9501 series non-oriented co-extruded film manufactured by Toray Advanced Film Co., Ltd. having a thickness of 30 μm. The base layer 42 of the outer sheet 41 is made of polyethylene terephthalate on which an inorganic thin film having a thickness of 12 μm is vapor-deposited. The intermediate layer 43 of the outer sheet 41 is made of polyethylene having a thickness of 15 μm. The paper layer 44 of the outer sheet 41 is made of greaseproof paper having a basis weight of 50 g/m ^2. The sealant layer 45 of the outer sheet 41 is made of polyethylene having a thickness of 25 μm. 3 g of water is held in the storage space S1.

In the pouch 10 of Example 1, the diameter of the opening 60 of the outer pouch 40 (hereinafter referred to as the "opening diameter") is 0.1 mm. The number of openings 60 (hereinafter referred to as the "number of openings") is 150. The area of the openings 60 relative to the area of the outer sheet 41 (hereinafter referred to as the "opening area ratio") is 0.13 percent. Note that the area of the outer sheet 41 excluding the sealed portion 50 was calculated as the area of the outer sheet 41.

The pouch 10 of Example 2 has an opening diameter of 0.2 mm, 150 openings, and an opening area ratio of 0.54 percent. The rest of the configuration is the same as that of the pouch 10 of Example 1.

The pouch 10 of Example 3 has an opening diameter of 0.3 mm, 150 openings, and an opening area ratio of 1.21 percent. The rest of the configuration is the same as that of the pouch 10 of Example 1.

The pouch 10 of Example 4 has an opening diameter of 0.2 mm, 300 openings, and an opening area ratio of 1.08 percent. The rest of the configuration is the same as that of the pouch 10 of Example 1.

The pouch 10 of Comparative Example 1 has an opening diameter of 0.5 mm, 150 openings, and an opening area ratio of 3.36 percent. The rest of the configuration is the same as that of the pouch 10 of Example 1.

The pouch 10 of Comparative Example 2 has an opening diameter of 0.2 mm, 600 openings, and an opening area ratio of 2.15 percent. The rest of the configuration is the same as that of the pouch 10 of Example 1.

The test results of the first comparison test will be described with reference to FIG.
In the retention evaluation test, no dripping of water or wet hands was observed in the pouches 10 of Examples 1 to 4 and Comparative Example 2. On the other hand, dripping of water was observed in the pouch 10 of Comparative Example 1, and wet hands were observed. In the remaining rate evaluation test, the pouches 10 of Examples 1 to 4 and the pouch 10 of Comparative Example 1 were evaluated as "good" because a sufficient amount of liquid remained. On the other hand, the pouch 10 of Comparative Example 2 was evaluated as "bad" because most of the liquid was released to the outside. From the results of the retention evaluation test, it became clear that the opening diameter is preferably set to 0.3 mm or less. From the results of the remaining rate evaluation test, it became clear that the number of openings is preferably set to 300 or less. In consideration of the retention evaluation test and the remaining rate evaluation test, it is preferable to set the opening area ratio to less than 2.0%.

Second Embodiment
A pouch 10 of the second embodiment will be described with reference to Figures 8 to 10. The pouch 10 of the second embodiment differs from the pouch 10 of the first embodiment in the configuration of the second release means R2 of the outer pouch 40. Configurations common to the pouch 10 of the first embodiment are given the same reference numerals, and descriptions thereof may be omitted in part or in whole.

As shown in Figures 8 and 9, the opening 60 provided in the outer pouch 40 includes a first opening 61 and a second opening 62. Neither the first opening 61 nor the second opening 62 is configured to penetrate the outer sheet 41 in the stacking direction.

The first opening 61 penetrates the base layer 42 and the intermediate layer 43 of the outer sheet 41 in the stacking direction. The first opening 61 is configured so as not to penetrate the paper layer 44 in the stacking direction. The first opening 61 may be partially provided so as not to penetrate the paper layer 44 in the stacking direction of the paper layer 44.

The second opening 62 penetrates the sealant layer 45 of the outer sheet 41 in the stacking direction. The second opening 62 is configured so as not to penetrate the paper layer 44 in the stacking direction. The second opening 62 may be partially provided so as not to penetrate the paper layer 44 in the stacking direction of the paper layer 44.

The first opening 61 and the second opening 62 may be positioned in the same way in the stacking direction, or may be at least partially misaligned. If at least a portion of the openings are misaligned, sustained release can be improved. The first opening 61 and the second opening 62 may be all the same in terms of opening diameter, number of openings, and opening area ratio, or at least one of them may be different.

<Second comparative test>
The second comparative test will be described. The second comparative test is a test for evaluating the appropriate configuration of the second releasing means R2 provided in the outer pouch 40 of the second embodiment. The second comparative test includes a retention strength evaluation test and a residual rate evaluation test. The retention strength evaluation test and the residual rate evaluation test were performed in the same manner as the first comparative test.

The second comparative test was conducted using the pouches 10 of Examples 1 to 3, the pouches 10 of Comparative Example 1, and the pouches 10 of Comparative Example 2. The configuration of each pouch 10 is described below. Note that the configuration of the inner pouch 20 is common to each pouch 10.

The inner sheet 21 and the outer sheet 41 of the pouch 10 of Examples 1 to 3, the pouch 10 of Comparative Example 1, and the pouch 10 of Comparative Example 2 are configured as follows. The base layer 22 of the inner sheet 21 is made of polyethylene terephthalate on which an inorganic thin film having a thickness of 12 μm is vapor-deposited. The sealant layer 23 of the inner sheet 21 is made of a 9501 series non-oriented co-extruded film manufactured by Toray Advanced Film Co., Ltd. having a thickness of 30 μm. The base layer 42 of the outer sheet 41 is made of polyethylene terephthalate on which an inorganic thin film having a thickness of 12 μm is vapor-deposited. The intermediate layer 43 of the outer sheet 41 is made of polyethylene having a thickness of 15 μm. The paper layer 44 of the outer sheet 41 is made of greaseproof paper having a basis weight of 50 g/m ^2. The sealant layer 45 of the outer sheet 41 is made of polyethylene having a thickness of 25 μm. 3 g of water is held in the storage space S1.

In the pouch 10 of Example 1, the opening diameter of the first opening 61 and the second opening 62 provided in the outer pouch 40 is 0.2 mm, the number of openings of the first openings 61 and the second openings 62 is 600 each, and the opening area ratio of the first openings 61 and the second openings 62 is 2.1 percent.

The pouch 10 of Example 2 has a first opening 61 and a second opening 62 provided in the outer pouch 40 with an opening diameter of 0.4 mm, the number of openings of the first openings 61 and the second openings 62 is 600 each, and the opening area ratio of the first openings 61 and the second openings 62 is 8.6 percent. The rest of the configuration is the same as that of the pouch 10 of Example 1.

The pouch 10 of Example 3 has a first opening 61 and a second opening 62 provided in the outer pouch 40 with an opening diameter of 0.6 mm, a number of openings of the first openings 61 and the second openings 62 of 600 each, and an opening area ratio of the first openings 61 and the second openings 62 of 19.4 percent. The rest of the configuration is the same as that of the pouch 10 of Example 1.

The pouch 10 of Comparative Example 1 has a first opening 61 and a second opening 62 provided in the outer pouch 40 with an opening diameter of 0.8 mm, a number of openings of the first openings 61 and the second openings 62 of 600 each, and an opening area ratio of the first openings 61 and the second openings 62 of 34.5 percent. The rest of the configuration is the same as that of the pouch 10 of Example 1.

The pouch 10 of Comparative Example 2 has a first opening 61 and a second opening 62 provided in the outer pouch 40 with an opening diameter of 1.0 mm, a number of openings of the first openings 61 and the second openings 62 of 600 each, and an opening area ratio of the first openings 61 and the second openings 62 of 53.8 percent. The rest of the configuration is the same as that of the pouch 10 of Example 1.

The results of the second comparison test will be described with reference to FIG.
In the retention evaluation test, no dripping of water or wet hands was observed in the pouches 10 of Examples 1 to 3 and Comparative Example 1. On the other hand, dripping of water and wet hands were observed in the pouch 10 of Comparative Example 2. In the remaining ratio evaluation test, the pouches 10 of Examples 1 to 3 were evaluated as "good" because a sufficient amount of liquid remained. On the other hand, the pouches 10 of Comparative Example 1 and Comparative Example 2 were evaluated as "bad" because most of the liquid was released to the outside. From the results of the retention evaluation test, it became clear that the opening diameters of the first opening 61 and the second opening 62 are preferably set to 1.0 mm or less. From the results of the remaining ratio evaluation test, it became clear that the opening area ratio is preferably set to less than 30 percent.

<Modification>
The description of the embodiments is merely an example of possible forms of the pouch and face mask according to the present invention, and is not intended to limit the forms. In addition to the respective embodiments, the pouch and face mask according to the present invention may take the form of a modified example of each embodiment shown below, or a combination of at least two of the modified examples that are not mutually contradictory.

- The inner seal portion 30 may take another form. As shown in Figs. 11 and 12, at least one of the inner seal portions 30 may be configured to protrude toward the storage space S1. In the illustrated example, the third inner seal portion 33 and the fourth inner seal portion 34 are formed with protrusions 33T and 34T toward the storage space S1. The seal width of the protrusion 33T is the same as the seal width of the third inner seal portion 33, wider than the seal width of the third inner seal portion 33, or narrower than the seal width of the third inner seal portion 33. An unsealed portion in which the overlapping sheets are not sealed is provided between the protrusion 33T and the outer edge of the inner pouch 20. The seal width of the protrusion 34T is the same as the seal width of the fourth inner seal portion 34, wider than the seal width of the fourth inner seal portion 34, or narrower than the seal width of the fourth inner seal portion 34. Between the protrusion 34T and the outer edge of the inner pouch 20, there is an unsealed portion where the overlapping sheets are not sealed. When the internal pressure of the storage space S1 rises, stress is concentrated at the tip of the protrusion 33T and the tip of the protrusion 34T, so that even if the seal strength is high, the first release means R1 is likely to be formed at the protrusion 33T and the protrusion 34T. This makes it possible to increase the seal strength of the inner seal portion 30, and suppresses unintended release of liquid by the first release means R1.

- The first release means R1 may take a different form. In one example, it is an opening pre-formed in the inner sheet 21. The opening is covered, for example, with an easy-peel sealant. When the user starts using the mask, the main surface 110 of the face mask 100 on which the pouch 10 is provided is pulled in the left-right or up-down direction, causing the easy-peel sealant to peel off and exposing the opening. The liquid in the storage space S1 is released to the outside through the exposed opening. The opening 60 included in the second release means R2 may be covered with an easy-peel sealant. In this case, unintended release of liquid by the second release means R2 is suppressed.

- The seal strength of the inner seal portion 30 can be changed as desired. For example, the seal strength of the first inner seal portion 31 and the second inner seal portion 32 is set to fall within the range of 0.5 N/15 mm to 10 N/mm. The seal strength of the third inner seal portion 33 and the fourth inner seal portion 34 is set as desired within the range of 0.5 N/15 mm to 130 N/15 mm, for example.

REFERENCE SIGNS LIST 10 pouch 20 inner pouch 21 inner sheet 30 inner seal portion 40 outer pouch 41 outer sheet 50 outer seal portion 60 opening 100 face mask 110 main surface portion 120 attachment portion 130 holding portion R1 first release means R2 second release means

Claims (8)

A pouch configured for attachment to a face mask, comprising:
Inner pouch and
an outer pouch provided outside the inner pouch ;
The inner pouch includes a first discharge means for discharging liquid held in the storage space of the inner pouch to the outside,
the outer pouch includes a second ejection means different from the first ejection means for ejecting the liquid to the outside of the outer pouch ;
The first discharge means is configured to discharge the liquid to the outside when an internal pressure of the storage space increases,
The second discharge means includes an opening formed in the outer pouch so as to gradually discharge the liquid discharged from the inner pouch to the outside of the outer pouch.
Pouch. The inner pouch is composed of a plurality of inner sheets,
At least a portion of the inner seal portion that joins the plurality of inner sheets has an easy-peel structure.
2. The pouch of claim 1 . The outer pouch is formed of an outer sheet,
The outer sheet includes a plurality of outer layers,
At least one of the outer layers comprises a paper layer.
3. The pouch according to claim 1 or 2 . The opening is provided in the stacking direction of at least a portion of the outer layers of the outer sheet.
The pouch of claim 3 . The opening is configured to extend through the outer sheet.
5. The pouch of claim 4 . The second discharge means discharges a smaller amount of liquid per time than the first discharge means.
The pouch according to any one of claims 1 to 5 . A face mask comprising the pouch according to any one of claims 1 to 6 . The face mask includes a holding portion that holds the pouch, and the first discharging means discharges the liquid in the storage space while the pouch is held in the holding portion.
The face mask according to claim 7 .