Pouch and face mask provided with the pouch

Abstract

To provide a pouch which can suitably discharge liquid held in a storage space.SOLUTION: A pouch 10 includes an inner pouch 20 and an outer pouch 40 provided on the outside of the inner pouch 20. The inner pouch 20 includes first discharge means R1 for discharging liquid held in a storage space S1 of the inner pouch 20 to the outside. The outer pouch 40 includes second discharge means R2 which discharges the liquid to the outside of the outer pouch 40 and is different from the first discharge means R1.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a pouch and a face mask in which the pouch is provided. [Background technology]

[0002] In order to prevent the mouth and nose from drying out, there are known techniques in which the mask itself contains moisture or a retaining material that retains moisture is provided in the mask. Patent Document 1 discloses a configuration in which a water-absorbent core capable of retaining moisture for a long period of time is housed in the mask. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-319421 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above mask, the absorbent core is impregnated with the water-retaining liquid and then housed in the housing of the mask. In this case, there is a risk that the water-retaining liquid will leak from the absorbent core before the absorbent core is housed in the housing of the mask. [Means for solving the problem]

[0005] 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 release means for releasing liquid held in the 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. Effect of the Invention

[0006] The pouch can suitably release liquid held in the storage space. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a front schematic view of the pouch of the first embodiment. [Diagram 2] Schematic cross-sectional view of the pouch in Figure 1 taken along line D2-D2. [Diagram 3] An enlarged view of a portion of the pouch in Figure 2. [Figure 4] FIG. 1 shows the flow of liquid within a pouch. [Diagram 5] A diagram showing the pouch attached to a face mask. [Figure 6] FIG. 2 shows one state of the face mask when first starting to use it. [Figure 7] Table showing the results of the first comparison test. [Figure 8] FIG. 6 is a schematic cross-sectional view of a pouch according to a second embodiment. [Figure 9] FIG. 9 is an enlarged partial view of the pouch in FIG. 8. [Figure 10] Table showing the results of the second comparative test. [Figure 11] FIG. 13 is a diagram showing an example of an inner pouch of a modified example. [Figure 12] FIG. 13 is a diagram showing an example of an inner pouch of a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (An example of a form that the pouch and the face mask in which the pouch is provided can take) (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 having a different releasing means, the liquid held in the storage space is suitably released from the inner pouch and the outer pouch.

[0009] (2) According to one example of the pouch, the first discharging means discharges the liquid to the outside as the internal pressure of the containing space increases. According to this pouch, the liquid can be discharged from the inner pouch by the first discharging means without touching 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.

[0010] (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.

[0011] (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.

[0012] (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 lamination direction of the outer sheet, so that the liquid can be released suitably.

[0013] (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 released by the second release means.

[0014] (7) According to one embodiment 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 gradually than the first release means, so that the liquid can be released for a long period of time.

[0015] (8) A face mask according to the present invention includes the pouch. This face mask includes a pouch made up of an inner pouch having a first releasing means and an outer pouch having a second releasing means, and therefore can prevent dryness in the user's oral cavity and nasal cavity.

[0016] (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 releasing 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.

[0017] First Embodiment A pouch 10 of the 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.

[0018] The inner pouch 20 is composed of an inner sheet 21 including a plurality of 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.

[0019] 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 a circle or a triangle, 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 polygon having pentagons or more sides, an inner seal portion is further included.

[0020] 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 are provided along the lateral direction of the inner pouch 20.

[0021] 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.

[0022] The seal strength of the inner seal portion 30 is set arbitrarily. The seal strength of all of the first inner seal portion 31 to the fourth inner seal portion 34 may be the same, 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 the seal strength 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 of the seal strength of the at least one inner seal portion 30 is 0.5 N / 15 mm or more. In one example, the range of the seal strength of the at least one inner seal portion 30 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 seal strength of the third inner seal portion 33 and the fourth inner seal portion 34 is set to be within the range of 0.5 N / 15 mm to 10 N / mm. The first inner seal portion 31 and the second inner seal portion 32 have a seal strength that is set arbitrarily within a range of 0.5 N / 15 mm to 130 N / 15 mm, for example.

[0023] 2, the inner pouch 20 includes a first releasing means R1 for releasing the liquid in the storage space S1 to the outside. The first releasing 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.

[0024] The outer pouch 40 is composed of an outer sheet 41 including a plurality of 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.

[0025] The outer sheets 41 constituting the outer pouch 40 are joined at an outer seal portion 50. The storage space S2 is a space surrounded by the two outer sheets 41 and the outer seal portion 50. The outer seal portion 50 includes a plurality of outer seal portions according to the shape of the outer pouch 40. In this embodiment, the outer seal portion 50 includes a first outer seal portion 51, a second outer seal portion 52, a third outer seal portion 53, and a fourth outer seal portion 54. When the shape of the outer pouch 40 is a circular or triangular shape, 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 having pentagons or more sides, an outer seal portion is further included.

[0026] 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 contour 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 contour 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 inner edge 52A and outer edge 52B is referred to as the "second outer seal width." The distance between inner edge 53A and outer edge 53B is referred to as the "third outer seal width." The distance between inner edge 54A and 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.

[0027] 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 50N / 15mm or more. In one example, the seal strength of the outer seal portion 50 can be in a range of 130N / 15mm or less. In one example, the seal strength of the outer seal portion 50 is 100N / 15mm.

[0028] 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 distances between the openings 60 are equal in one example. In another example, the distances between the openings 60 are 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.

[0029] The structures 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.

[0030] The substrate layer 22 is made of a material having excellent water resistance, gas barrier properties, and heat resistance. The substrate layer 22 is, for example, a transparent vapor deposition layer. An example of the material constituting the substrate layer 22 is polyethylene terephthalate on 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, within the range of 9 μm to 25 μm. In one example, the thickness of the substrate layer 22 is 12 μm.

[0031] The sealant layer 23 is made of a material having excellent heat resistance, heat sealability, and impact resistance. An example of a material for the sealant layer 23 is a cohesive peeling type easy peel sealant. The thickness of the sealant layer 23 can be selected arbitrarily. 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, a 9501 series non-oriented co-extruded film manufactured by Toray Advanced Film Co., Ltd. can be used as the sealant layer 23.

[0032] The substrate layer 42 is made of a material having excellent water resistance and heat resistance. The substrate layer 42 is, for example, a transparent vapor deposition layer. One example of the material constituting the substrate layer 42 is polyethylene terephthalate on 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, within the range of 9 μm to 25 μm. In one example, the thickness of the substrate layer 42 is 12 μm.

[0033] The intermediate layer 43 is made of a material having excellent heat resistance and impact resistance. The intermediate layer 43 is made of at least one of polyethylene, polypropylene, polyester, vinyl carboxylate, and acrylic ester, for example. The thickness of the intermediate layer 43 is in the range of 10 μm to 30 μm, for example. In one example, the intermediate layer 43 is made of polyethylene having a thickness of 15 μm.

[0034] 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 that contributes 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. One preferred example of the minimum basis weight of the paper layer 44 is 20 g / m 2 A preferred example of the maximum value of the basis weight of the paper layer 44 is 200 g / m 2 In one example, the basis weight of the paper layer 44 is 50 g / m 2 It is.

[0035] The sealant layer 45 is made of a material having excellent heat resistance, heat sealability, and impact resistance. The sealant layer 45 is made of at least one of polyethylene, polypropylene, polyester, vinyl carboxylate, and acrylic ester, for example. The thickness of the sealant layer 45 is in the range of 10 μm to 30 μm, for example. In one example, the sealant layer 45 is made of polyethylene having a thickness of 25 μm.

[0036] 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.

[0037] The following describes a method for manufacturing the pouch 10. The method for manufacturing the pouch 10 includes at least a first step of manufacturing the inner pouch 20 that holds a liquid in the storage space S1, and a second step of manufacturing the outer pouch 40 and enclosing the inner pouch 20 in the storage space S2 of the outer pouch 40.

[0038] 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 from 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.

[0039] In the second step, the 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 at 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.

[0040] With reference to Fig. 4, an example of a flow path of the liquid in the storage space S1 until it is discharged to the outside of the pouch 10 will be described. When pressure is applied with a force in the direction of the arrow A1 shown in Fig. 4, the bond of the easy-peel structure part of the inner seal part 30, which is the first discharge means R1 of the inner pouch 20, is peeled off. The liquid in the storage space S1 is discharged to the storage space S2 along the arrow A2. The liquid in the storage space S2 is discharged to the outside through the opening 60, which is the second discharge means R2, along the arrow A3.

[0041] The area of ​​the opening formed in the portion where the easy-peel structure is peeled off is larger than the opening area of ​​the opening 60. Therefore, the second releasing means R2 releases a smaller amount of liquid per time than the first releasing means R1. The liquid released from the storage space S1 to the storage space S2 by the first releasing means R1 is released from the storage space S2 to the outside over a period of time by the second releasing means R2.

[0042] 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.

[0043] The face mask 100 further includes a holding portion 130 that holds the pouch 10. The holding portion 130 is configured, for example, in a bag shape. In this case, the holding portion 130 includes an opening (not shown) that allows the pouch 10 to be inserted and removed. The holding portion 130 is provided, for example, on at least one of the first main surface 111 or the second main surface 112. Preferably, the holding portion 130 is provided between the first main surface 111 and the second main surface 112.

[0044] 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.

[0045] <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.

[0046] In the retention strength evaluation test, the pouch 10 was pressurized, and the amount of liquid released from the outer pouch 40 was evaluated in a state in which 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. The evaluators rated the pouch 10 as "good" when neither water dripping nor liquid adhered to the hands was observed. The evaluators rated the pouch 10 as "poor" when water dripping was observed or liquid adhered to the hands was recognized.

[0047] 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 had elapsed was evaluated. The predetermined time was set to 10 hours. The evaluator evaluated the residual rate of the liquid in the pouch 10 after 10 hours as "good" if it was 20 weight percent or more, and evaluated it as "poor" if it was less than 20 weight percent.

[0048] The first comparative test was carried out 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 will be described below. Note that the configuration of the inner pouch 20 is common to all pouches 10.

[0049] The inner sheet 21 and the outer sheet 41 of the pouches 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 a 12 μm-thick inorganic thin film is vapor-deposited. The sealant layer 23 of the inner sheet 21 is made of a 30 μm-thick 9501 series non-oriented co-extruded film manufactured by Toray Advanced Film Co., Ltd. The base layer 42 of the outer sheet 41 is made of polyethylene terephthalate on which a 12 μm-thick inorganic thin film is vapor-deposited. The middle layer 43 of the outer sheet 41 is made of polyethylene with a thickness of 15 μm. The paper layer 44 of the outer sheet 41 has a basis weight of 50 g / m 2 The outer sheet 41 is made of greaseproof paper of 25 μm thickness. The sealant layer 45 of the outer sheet 41 is made of polyethylene of 25 μm thickness. The storage space S1 holds 3 g of water.

[0050] 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. The area of ​​the outer sheet 41 excluding the sealed portion 50 was calculated as the area of ​​the outer sheet 41.

[0051] The pouch 10 of Example 2 has an opening diameter of 0.2 mm, the number of openings of 150, and an opening area ratio of 0.54 percent. Other configurations are similar to those of the pouch 10 of Example 1.

[0052] The pouch 10 of Example 3 has an opening diameter of 0.3 mm, the number of openings of 150, and an opening area ratio of 1.21 percent. Other configurations are similar to those of the pouch 10 of Example 1.

[0053] The pouch 10 of Example 4 has an opening diameter of 0.2 mm, the number of openings of 300, and an opening area ratio of 1.08 percent. Other configurations are similar to those of the pouch 10 of Example 1.

[0054] The pouch 10 of Comparative Example 1 has an opening diameter of 0.5 mm, the number of openings of 150, and an opening area ratio of 3.36 percent. Other configurations are similar to those of the pouch 10 of Example 1.

[0055] The pouch 10 of Comparative Example 2 has an opening diameter of 0.2 mm, the number of openings of 600, and an opening area ratio of 2.15 percent. Other configurations are similar to those of the pouch 10 of Example 1.

[0056] 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 percent.

[0057] <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 releasing means R2 of the outer pouch 40. Configurations common to the pouch 10 of the first embodiment are given the same reference numerals, and some or all of the description may be omitted.

[0058] 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.

[0059] The first opening 61 penetrates the base material 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 provided partially to the extent that it does not penetrate the paper layer 44 in the stacking direction of the paper layer 44.

[0060] 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 provided partially to the extent that it does not penetrate the paper layer 44 in the stacking direction of the paper layer 44.

[0061] The first opening 61 and the second opening 62 may be aligned in the stacking direction, or may be at least partially offset. When at least a portion of the openings are offset, sustained release can be improved. The first opening 61 and the second opening 62 may be aligned in the opening diameter, the number of openings, and the opening area ratio, or may be different in at least one of them.

[0062] <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.

[0063] The second comparative test was carried out using the pouches 10 of Examples 1 to 3, the pouch 10 of Comparative Example 1, and the pouch 10 of Comparative Example 2. The configuration of each pouch 10 will be described below. Note that the configuration of the inner pouch 20 is common to all pouches 10.

[0064] The inner sheet 21 and the outer sheet 41 of the pouches 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 a 12 μm-thick inorganic thin film is vapor-deposited. The sealant layer 23 of the inner sheet 21 is made of a 30 μm-thick 9501 series non-oriented co-extruded film manufactured by Toray Advanced Film Co., Ltd. The base layer 42 of the outer sheet 41 is made of polyethylene terephthalate on which a 12 μm-thick inorganic thin film is vapor-deposited. The middle layer 43 of the outer sheet 41 is made of polyethylene with a thickness of 15 μm. The paper layer 44 of the outer sheet 41 has a basis weight of 50 g / m 2 The outer sheet 41 is made of greaseproof paper of 25 μm thickness. The sealant layer 45 of the outer sheet 41 is made of polyethylene of 25 μm thickness. The storage space S1 holds 3 g of water.

[0065] 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.

[0066] 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 other configurations are similar to those of the pouch 10 of Example 1.

[0067] 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 the first openings 61 and the second openings 62 each of which is 600, and an opening area ratio of the first openings 61 and the second openings 62 of 19.4 percent. The other configurations are similar to those of the pouch 10 of Example 1.

[0068] 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 the first openings 61 and the second openings 62 each of which is 600, and an opening area ratio of the first openings 61 and the second openings 62 of 34.5 percent. The other configurations are similar to those of the pouch 10 of Example 1.

[0069] 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 the first openings 61 and the second openings 62 each of which is 600, and an opening area ratio of the first openings 61 and the second openings 62 of 53.8 percent. The other configurations are similar to those of the pouch 10 of Example 1.

[0070] The results of the second comparative 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 was observed in the pouch 10 of Comparative Example 2, and wet hands were observed. 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.

[0071] <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.

[0072] The inner seal portion 30 may take another form. As shown in FIG. 11 and FIG. 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 a protrusion portion 33T and a protrusion portion 34T toward the storage space S1. The seal width of the protrusion portion 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 to each other is provided between the protrusion portion 33T and the outer edge of the inner pouch 20. The seal width of the protrusion portion 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. An unsealed portion where overlapping sheets are not sealed is provided between the protrusion 34T and the outer edge of the inner pouch 20. When the internal pressure of the storage space S1 increases, stress is concentrated at the tip of the protrusion 33T and the tip of the protrusion 34T, so that the first release means R1 is likely to be formed at the protrusion 33T and the protrusion 34T even if the seal strength is high. 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.

[0073] The first release means R1 may take another form. In one example, it is an opening preformed in the inner sheet 21. The opening is covered, for example, by an easy-peel sealant. When the user starts using the face mask 100, on which the pouch 10 is provided, pulling the main surface portion 110 in the left-right or up-down direction, the easy-peel sealant peels off and the opening is exposed. The liquid in the storage space S1 is released to the outside from 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.

[0074] 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 to fall within the range of 0.5 N / 15 mm to 130 N / 15 mm as desired. [Explanation of symbols]

[0075] 10 ... pouch 20…inner pouch 21 ... Inner seat 30 … Inner seal part 40 …Outer pouch 41 ... Outer seat 50 …Outer seal part 60 ...Opening 100…Face mask 110…Main surface part 120…Mounting part 130...Holding part R1...first release means R2...Second release means

Claims

1. A pouch configured to be attached 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.

2. 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.

3. 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.

4. 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.

5. The opening is configured to extend through the outer sheet.

5. The pouch of claim 4.

6. 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.

7. A pouch according to any one of claims 1 to 6. Face mask.

8. The face mask includes a holding portion for holding the pouch. The first discharge means discharges the liquid in the storage space while the pouch is held in the holding portion. The face mask according to claim 7.

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