JP2018172807A - Absorbent sheet and mask with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent sheet which is easily inserted in a mask body and can hold water for a long time, thereby supplying the water to the oral cavity and/or the nasal cavity, and a mask with the same.SOLUTION: An absorbent sheet for a mask can hold a water retaining liquid; and has a plurality of vent holes formed by arranging two or less vent holes on the same row in the crosswise direction when the mask is worn/used.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an absorbent sheet and a mask including the same.

In recent years, masks have been proposed for the purpose of preventing dryness of the oral cavity and / or nasal cavity of users during sleep, in addition to measures against hay fever and cold prevention.
For example, Patent Document 1 describes an absorbent core for holding a water retaining liquid having a vent hole attached to a mask, and a mask including the same.

JP 2011-161272 A

However, such a conventional absorbent core is formed by arranging all the air holes on the same row in the horizontal direction when used in the mask, so that it is bent up and down along the horizontal line. Since the curved portion tends to be formed on the lower side of the absorbent core, the lower side of the absorbent core is easily caught on the opening edge of the absorbent core insertion pocket portion of the mask body, so that it is difficult to insert and attach to the mask body. was there.
In addition, when the mask is worn and used due to the upper and lower bending, the adhesiveness between the left and right side edges and the cheek portion decreases. As a result, depending on the conventional absorbent core, moisture can be retained and supplied for a long time. The fact was that the function was not fully obtained.

  Although the present invention has been made in view of such conventional problems and actual conditions, it can be easily inserted into the mask body, can retain moisture for a long time, and can supply moisture to the oral cavity and / or nasal cavity. An object is to provide an absorbent sheet and a mask including the same.

  As a result of various researches to solve the above problems, the present inventor has arranged a breathing hole for breathing in the absorbent sheet so that there are at least two ventilation holes on the same line in the lateral direction. As a result, it was found that extremely good results could be obtained, and the present invention was completed.

That is, the present invention is an absorbent sheet for a mask that can hold a water retention liquid,
The absorbent sheet is provided with a plurality of rows of vent holes in which two or less vent holes are arranged and formed on the same row in the horizontal direction when mounted on a mask. This solves the above problem.
Moreover, this invention solves the said subject with the mask provided with the said absorbent sheet.

  According to the absorbent sheet of the present invention, since the number of ventilation holes is two or less on the same line in the horizontal direction, it is difficult to bend up and down along the horizontal line, and a curved portion does not occur on the lower side. As a result, it can be easily inserted into the mask body. In addition, the absorbent sheet of the present invention is less likely to bend up and down along the horizontal line. As a result, when the mask is used, the adhesiveness between the left and right side edges and the cheek is increased, and moisture is retained and supplied for a long time. Therefore, the mask provided with this is useful for preventing dryness of the user's oral cavity and / or nasal cavity.

It is a front explanatory view of the absorptive sheet concerning a 1st embodiment of the present invention. It is front explanatory drawing of the absorptive sheet concerning a 2nd embodiment of the present invention. It is front explanatory drawing of the absorptive sheet concerning the 3rd embodiment of the present invention. It is front explanatory drawing of the absorptive sheet concerning the 4th embodiment of the present invention. It is a figure explaining arrangement | positioning of the air vent in an absorptive sheet. It is a figure which shows the mounting state of the mask provided with the absorptive sheet. It is front explanatory drawing of the inner side (side which touches a face) of this invention mask. It is AA line end surface explanatory drawing of FIG. It is front explanatory drawing of the comparative absorbent sheet used for the evaluation test. It is a figure which shows the evaluation result of the humidity in a mask.

  Embodiments of the present invention will be described below with reference to the drawings.

First, the absorbent sheet according to the first embodiment of the present invention will be described with reference to FIG.
In FIG. 1, 10 is an absorptive sheet, which has a substantially rectangular shape with no corners at least on the lower side, and a plurality of vent holes 11 are formed over the entire surface. The absorptive sheet 10 is a sheet that retains a water retention liquid and is inserted and attached to a mask to supply moisture to a user's oral cavity and / or nasal cavity.
At the time of mounting on the mask, five rows of vent holes in which two or more vent holes 11 are arranged and formed on the same row in the longitudinal direction of the absorbent sheet 10 are formed. On the other hand, seven rows of vent holes in which two or less vent holes 11 are arranged and formed are formed on the same row in the horizontal direction. That is, no more than two vent holes 11 are formed in each vent hole row. Here, in the present specification, “on the same column and on the same row” means that the air holes overlap on the same straight line, but preferably means that the air holes overlap on the same straight line, It does not include those that only partially touch the same straight line.

Next, the absorbent sheet according to the second embodiment of the present invention will be described with reference to FIG.
In FIG. 2, reference numeral 20 denotes an absorbent sheet, which has a substantially rectangular shape having no corners at least on the lower side, and a triangular notch 22 is formed at the center of the lower side, and A cut 23 is formed at the center of the upper side. These notches 22 and cuts 23 make it easier for the mask to bend along the vertical line, so that the mask can be mounted and used in a state of being more fit to the face shape. The absorbent sheet 20 has a plurality of elliptical vent holes 21 formed on the entire surface thereof. The absorptive sheet 20 is a sheet that retains the water retention liquid and is inserted and mounted in a mask to supply moisture to the user's oral cavity and / or nasal cavity.
At the time of mounting on the mask, eight rows of vent holes in which one or more vent holes 21 are arranged and formed are formed on the same vertical row of the absorbent sheet 20. On the other hand, 15 rows of vent holes in which two or less vent holes 21 are arranged and formed are formed on the same row in the horizontal direction.

Next, an absorbent sheet according to a third embodiment of the present invention will be described with reference to FIG.
In FIG. 3, reference numeral 30 denotes an absorbent sheet, which has a concave shape having no corners at least on the lower side, and a plurality of rectangular vent holes 31 are formed over the entire surface. The absorptive sheet 30 is a sheet that retains a water retention liquid and is inserted and mounted in a mask to supply moisture to the oral cavity and / or nasal cavity of the user.
At the time of mounting on the mask, six rows of vent holes in which two or more vent holes 31 are arranged and formed are formed on the same row in the longitudinal direction of the absorbent sheet 30. On the other hand, on the same row in the horizontal direction, seven rows of vent holes in which two or less vent holes 31 are arranged and formed are formed. That is, no more than two vent holes 31 are formed in each vent hole row.

The absorbent sheet of the present invention may be a fourth embodiment as shown in FIGS. 4 (a) to (e).
In FIG. 4A, reference numeral 60 denotes an absorbent sheet, which has a substantially rectangular shape having no corners at least on the lower side. The absorbent sheet 60 has a plurality of circular ventilation holes 61 formed over the entire surface, and a rectangular ventilation hole 61 formed in the center. Since the rectangular vent hole 61 in the central portion makes it easier for the mask to bend along the vertical line, the mask can be mounted and used in a state of being more fitted to the face shape. The absorptive sheet 60 is a sheet that retains the water retention liquid and is inserted and mounted in a mask to supply moisture to the oral cavity and / or nasal cavity of the user.
At the time of mounting on the mask, five rows of vent holes in which one or more vent holes 61 are arranged and formed on the same row in the longitudinal direction of the absorbent sheet 60 are formed. On the other hand, five rows of vent holes in which vent holes 61 are arranged and formed are formed on the same row in the horizontal direction.

In FIG. 4B, reference numeral 70 denotes an absorbent sheet, which has a polygonal shape. The absorbent sheet 70 has a plurality of circular ventilation holes 71 formed on the entire surface thereof. The absorptive sheet 70 is a sheet that retains a water retention liquid and is inserted and mounted in a mask to supply moisture to the user's oral cavity and / or nasal cavity.
At the time of mounting on the mask, five rows of vent holes in which two or more vent holes 71 are arranged and formed are formed on the same vertical row of the absorbent sheet 70. On the other hand, seven rows of vent holes in which two or less vent holes 71 are arranged and formed are formed on the same row in the horizontal direction.

In FIG.4 (c), 80 is an absorptive sheet | seat and is exhibiting the triangular shape, and the triangular notch part 82 is formed in the center part of the upper side. The notch 82 makes it easier for the mask to bend along the vertical line, so that the mask can be worn and used in a more fitted shape to the face shape. The absorbent sheet 80 has a plurality of circular ventilation holes 81 formed on the entire surface thereof. The absorptive sheet 80 is a sheet that retains the water retention liquid, and is inserted and attached to the mask to supply moisture to the oral cavity and / or nasal cavity of the user.
At the time of mounting on the mask, three rows of vent holes in which two or more vent holes 81 are arranged and formed are formed on the same vertical row of the absorbent sheet 80. On the other hand, five rows of vent holes in which two or less vent holes 81 are arranged and formed are formed on the same row in the horizontal direction.

In FIG.4 (d), 90 is an absorptive sheet | seat and is exhibiting elliptical shape, and the triangular notch 92 is formed in the center part of the upper and lower sides. Since the notch 92 makes it easier for the mask to bend along the vertical line, the mask can be worn and used in a more fitted state to the face shape. The absorbent sheet 90 has a plurality of circular ventilation holes 91 formed over the entire surface thereof. The absorptive sheet 90 is a sheet that retains a water retention liquid and is inserted and mounted in a mask to supply moisture to the user's oral cavity and / or nasal cavity.
At the time of mounting on the mask, five rows of vent holes in which two or more vent holes 91 are arranged and formed on the same row in the longitudinal direction of the absorbent sheet 90 are formed. On the other hand, seven rows of vent holes in which two or less vent holes 91 are arranged and formed are formed on the same row in the horizontal direction.

In FIG.4 (e), 110 is an absorptive sheet | seat, is exhibiting the rectangular shape which does not have a corner | angular part in 4 directions, and the triangular notch part 112 is formed in the center part of the upper side and the lower side. Yes. Since the notch 112 makes it easier for the mask to bend along the vertical line, the mask can be worn and used in a more fitted state to the face shape. The absorbent sheet 110 has a plurality of circular air holes 111 formed over the entire surface thereof. The absorptive sheet 110 is a sheet that retains a water retention liquid, and is inserted and attached to a mask to supply moisture to the user's oral cavity and / or nasal cavity.
At the time of mounting on the mask, five rows of vent holes in which one or more vent holes 111 are arranged and formed on the same row in the longitudinal direction of the absorbent sheet 110 are formed. On the other hand, five rows of vent holes in which two or less vent holes 111 are arranged and formed are formed on the same row in the horizontal direction.

In the absorbent sheet of the present invention, the number of air holes formed on the same vertical column is preferably 1 or more, more preferably 2 to 10, and particularly preferably 2 or 3. Since one or more vent holes are present on the same vertical column in the center of the mask closest to the nose, as shown in FIG. 6, the mask is likely to bend left and right along the vertical line. It can be mounted and used in a state that fits the shape. Moreover, the number of the vent hole rows in the absorbent sheet is preferably 3 to 10 rows, preferably 3 to 8 rows, preferably 4 to 7 rows.
In said 1st-4th embodiment (FIGS. 1-4), on the longitudinal centerline of absorbent sheet 10,20,30,60,70,80,90,110, and this centerline The vent holes 11, 21, 31, 61, 71, 81, 91, 111 are formed so as to be symmetric with respect to the center, but the present invention is not limited to this mode and can be implemented asymmetrically.

In the absorbent sheet of the present invention, the number of air holes formed on the same row in the lateral direction is preferably 2 or less, more preferably 1 or 2. Moreover, the number of rows of vent holes in the transverse direction in the absorbent sheet is preferably 2 to 20 columns, more preferably 4 to 15 rows, and particularly preferably 6 to 10 columns.
Moreover, in said 1st, 2nd and 4th embodiment (FIG.1, 2 and 4), on the horizontal centerline of the absorbent sheet 10,20,60,70,80,90,110, The vent holes 11, 21, 61, 71, 81, 91, 111 are formed so as to be vertically symmetrical about the center line. However, the present invention is not limited to this mode, and the third embodiment (FIG. As in 3), it can also be implemented asymmetrically.

  In the absorbent sheet of the present invention, the total number of air holes formed over the entire surface of the absorbent sheet is preferably 3 to 50, more preferably 5 to 30 from the viewpoint of ease of breathing by the mask user. And particularly preferably 7 to 15.

  In the absorbent sheet of the present invention, examples of the shape of the vent include a circle, an ellipse, and a rectangle. Preferably it is circular. The size of the vent can be adjusted as appropriate, but in the case of a circle, the diameter of the circle is preferably 1 to 15 mm, more preferably 3 to 10 mm from the viewpoint of ease of breathing by the mask user. Particularly preferably, it is 5 to 7 mm. In the case of an ellipse, the major axis of the ellipse is preferably 1 to 15 mm, more preferably 3 to 10 mm, particularly preferably 4 to 7 mm, and the minor axis of the ellipse is preferably 1 to 14 mm, more preferably 2 to 9 mm. Particularly preferably, it is 3 to 6 mm. In the case of a rectangular shape, the long side length of the rectangular shape is preferably 1 to 15 mm, more preferably 3 to 13 mm, particularly preferably 5 to 10 mm, and the short side length is preferably 1 to 14 mm. More preferably, it is 2-9 mm, Most preferably, it is 3-6 mm.

In the absorbent sheet of the present invention, the interval between the air holes formed on the same vertical column and the same horizontal row can be appropriately adjusted, but is formed on the same vertical column. The interval between the vent holes is 2 to 25 mm, more preferably 4 to 20 mm, particularly preferably 6 to 15 mm, and the interval between the vent holes formed on the same row in the horizontal direction is 3 to 75 mm, more preferably. Is 5 to 60 mm, particularly preferably 10 to 45 mm.
Moreover, although the space | interval of each ventilation hole row | line | column and ventilation hole row | line in the absorbent sheet of this invention can be adjusted suitably, the space | interval of each ventilation hole row | line | column is 2-20 mm, More preferably, it is 4-15 mm, Especially preferably. Is 5 to 10 mm, and the interval between the air holes formed on the same row in the horizontal direction is 0 to 10 mm, more preferably 0 to 5 mm, and particularly preferably 0 to 3 mm.

Area of the water-absorbing sheet of the present invention, for example, is preferably 20～80Cm ^2, further preferably 25～60Cm ^2, and particularly preferably 30~40cm ^2.

  As a dimension of the water-absorbent sheet of the present invention, for example, the total length (vertical dimension) in the vertical direction is preferably 2 to 16 cm, more preferably 4 to 13 cm, and particularly preferably 6 to 10 cm. . On the other hand, the total length (lateral dimension) of the lateral method is preferably 5 to 22 cm, more preferably 7 to 20 cm, and particularly preferably 10 to 18 cm.

In the present invention, the longitudinal maximum length (vertical dimension, cm) of the water-absorbent sheet is W ₁ , the lateral maximum length (transverse dimension, cm) is W ₂ , and the longitudinal direction of the vents on the same row is When the total maximum value (cm) of the diameter is C ₁ and the total maximum value (cm) of the lateral diameters of the vent holes on the same row is C ₂ , the water absorption is performed so that the relationship of the following formula (1) is satisfied. It is preferable to form a vent hole in the adhesive sheet.
{(C ₁ ) / (W ₁ )}> {(C ₂ ) / (W ₂ )} (1)
Here, the total maximum value of the vertical diameters of the vent holes on the same row means the maximum value among the total values of the vertical diameters of the vent holes on the same row calculated for each column. Further, the total maximum value of the horizontal diameters of the vent holes on the same row means the maximum value among the total values of the horizontal diameters of the vent holes on the same row calculated for each row.
For example, in the first embodiment (FIG. 1), it is preferable to form a vent hole in the water absorbent sheet so that the relationship shown in FIG. 5 is established.
By forming the vent hole in this manner, the holding force for maintaining the structure of the lateral center portion of the water absorbent sheet is weakened and stress concentrates. Therefore, the water absorbent sheet bends along the nose portion when the mask is worn. As a result, an appropriate mask space can be obtained, a certain amount of water evaporated from the water absorbent sheet can be held, and a sufficient moisturizing feeling can be obtained.

Examples of the fiber material of the water-absorbent sheet of the present invention include hydrophilic fibers, blends of hydrophilic fibers and synthetic fibers.
Examples of hydrophilic fibers include pulp, rayon, and cotton. Among these, pulp is preferable from the viewpoints of flexibility, water retention, water absorption, and cost.
Examples of synthetic fibers include polypropylene, polyethylene, polyester, polyethylene terephthalate, and the like.
In the case of blending hydrophilic fibers and synthetic fibers, from the viewpoint of productivity, durability, and processability, it is preferable to use a blend of pulp and fibers having fusibility such as polyethylene and polypropylene. The ratio of fibers having fusibility, such as polyethylene and polypropylene, is preferably 60:40 to 99: 1 (mass ratio), more preferably 80:20 to 99: 1 (mass ratio). It is preferable to set it as 85: 15-95: 5 (mass ratio).
Examples of a method for producing such a water absorbent sheet include an airlaid method, a spunlace method, a spunbond method, a melt blow method, a needle punch method, and the like, and an airlaid method is preferable.

The basis weight of the water-absorbent sheet of the present invention is preferably 200 to 1000 g / m ² from the viewpoint of sufficiently retaining the water retaining liquid, the feeling of use such as air permeability, and the viewpoint of productivity, and further 300 to 800 g. / more preferably to ^{m 2,} and particularly preferably 400-600 g / ^{m 2.} When the basis weight is 1000 g / m ² or less, the water-absorbent sheet itself is not easily hardened, and not only the air permeability and the feeling of use at the time of wearing are good, but also an appropriate mask space is obtained and the adhesion at the time of wearing the mask is good As a result, a sufficient moisturizing feeling can be obtained. When the basis weight is 200 g / m ² or more, the water-absorbent sheet itself is stiff, so that it can be easily accommodated in the pocket portion of the mask body, and moisture can be sufficiently retained to obtain a moisturizing feeling.

  Further, the thickness of the water absorbent sheet is preferably 1 to 10 mm, more preferably 2 to 8 mm, and particularly preferably 3 to 6 mm.

  Although the water-absorbent sheet of the present invention may be a single layer, it is preferably a multilayer structure of 2 to 6 layers from the viewpoint of sufficiently retaining the water retaining liquid and the durability, A multilayer structure is more preferable, and a multilayer structure of 3 to 4 layers is particularly preferable. In the case of such a multilayer structure, the nonwoven fabric of the layers arranged at both ends may be the same material or different materials.

As the shape of the water-absorbent sheet of the present invention, a circle, an ellipse, a rectangle, a triangle, a polygon, a convex shape, a concave shape, etc. are preferable, a rectangle is more preferable, and there is a corner at least on the lower side of the shape of the water-absorbent sheet. Particularly preferred is a shape having a substantially rectangular shape. By making the shape of a substantially rectangular shape having no corners at least on the lower side of the shape of the water absorbent sheet, the lower side of the absorbent core is the opening edge of the absorbent core insertion pocket portion of the mask body. It is easy to insert and attach to the mask body without being caught.
Note that a cutout portion having a corner other than a triangular shape or a semicircular cutout having no corner can be formed in the central portion of the upper side and the lower side of the water absorbent sheet.

The water retention liquid retained in the water-absorbent sheet of the present invention is not particularly limited as long as it is safe for the human body and effectively prevents the user's oral cavity and / or nasal cavity from being dried. The water retention liquid may be water, or may contain water as a main component and components other than water.
Examples of components other than water include preservatives such as methyl paraben, ethyl paraben, propyl paraben, polyamide propyl biguanide and phenoxyethanol; humectants such as glycerin, propylene glycol, 1,3-butylene glycol, hyaluronate and betaine; xanthan gum Water-soluble thickeners such as hydroxypropylmethylcellulose (HPMC), hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC), agar, guar gum, carrageenan, etc .; stabilizers such as ethylenediaminetetraacetic acid; surface activity such as cetylpyridinium chloride Examples include agents and fragrances.

  It is preferable that 3-20g of water retention liquid is hold | maintained at a water absorbing sheet, it is still more preferable that 4-15g is hold | maintained, and it is especially preferable that 5-10g is hold | maintained.

  The water retention liquid may be impregnated in advance in the absorbent sheet, or may be impregnated in the absorbent sheet when using the mask. When the absorbent sheet is impregnated with the water retaining liquid in advance, the absorbent sheet is preferably stored in a bag such as a water-impermeable aluminum laminate film or an aluminum-deposited PET film.

Next, the mask of the present invention including the absorbent sheet 10 will be described with reference to FIGS.
In FIG. 7, reference numeral 40 denotes a mask, which includes a mask body 41 having a multilayer structure for covering a part of the user's face (for example, around the mouth and nostrils), and a fine body attached to both sides of the mask body 41. It is comprised by the ear | hook part 45 made from a string. The mask 40 has a so-called “pleated pattern” and includes pleats (not shown) formed from a plurality of lateral folds. The pleat is folded into two substantially Ω-shapes before use, and is configured to have a three-dimensional shape that bulges toward the outside of the mask 40 when the pleats are unfolded during use. By adopting this three-dimensional shape, a space can be formed around the mouth and nostril when the mask is attached to the face. By forming the space, it is possible to prevent the absorbent sheet 10 from coming into contact with the face, and the usability is improved. In addition, by forming the space, it is possible to retain a certain amount of moisture diffused from the absorbent sheet 10 in the space, and it is possible to continuously retain a certain amount of moisture.

As shown in FIG. 8, the mask main body 41 has a woven fabric or a non-woven fabric 42b from the inner side (the side that touches the face) to the outer side (the side opposite to the side that touches the face); The mesh film 43b having poor water permeability; the mesh film 43a having air permeability and hardly water permeability; and the woven fabric or the nonwoven fabric 42a are laminated in this order.
Here, as a mesh film having air permeability and hardly water permeability, for example, a polyester resin, a polypropylene resin, a nylon resin, a urethane resin, and a polyethylene resin are used, and in particular, a polyethylene resin. Are preferably used.
The mesh film can be manufactured by conventional means such as a round net. The mesh film is preferably hexagonal from the viewpoint of air permeability and overall flexibility. The pore diameter of the mesh is preferably 0.1 to 2 mm at the maximum diameter portion, and more preferably 0.5 to 1.5 mm.

Inside the mask main body 41, an absorbent sheet accommodating pocket portion 44 having an opening in the upper portion is formed by the pair of breathable and hardly water-permeable mesh films 43a and 43b. . Thus, when the absorbent sheet 10 is sandwiched between a pair of breathable and hardly permeable mesh films, moisture can be retained and supplied for a longer period of time. Or it is preferable in preventing drying of the nasal cavity.
Although FIG. 8 illustrates the mask body 41 having a four-layer multilayer structure, the mask body 41 may be a single layer or a multilayer structure of two or more layers. The mask body 41 preferably has a multilayer structure of 2 to 6 layers from the viewpoints of removing foreign matters such as dust, pollen, virus, or PM2.5, maintaining the three-dimensional shape of the pleats, and durability. It is more preferably a five-layer multilayer structure, and particularly preferably a three- to five-layer multilayer structure.

As the woven or non-woven fabric constituting the mask body 41, generally known materials can be used as mask materials. For example, non-woven fabrics, gauze, paper, moisture-permeable resin sheets, etc. made of polyester fiber, polypropylene fiber, nylon fiber, urethane fiber, polyethylene fiber, rayon, cotton, wool and the like can be mentioned.
Especially, from a viewpoint of productivity and shape retention property, a nonwoven fabric is preferable, the nonwoven fabric which consists of a polyester fiber and a polypropylene fiber is more preferable, and especially the nonwoven fabric which consists of a polypropylene fiber is preferable.
The mask main body 41 can be appropriately formed by, for example, sewing, ultrasonic welding, thermal fusion, or the like.

  The pocket portion 44 that accommodates the absorbent sheet 10 is formed into a bag shape using a mesh film or the like that has air permeability and poor water permeability, and is attached to the inner side of the mask body 41 (side that touches the face). May be. When attaching the bag-shaped pocket portion 44 to the mask body 41, it is preferable to attach only the upper portion thereof.

The dimensions of the mask body 41 may be appropriately determined in consideration of the face size. For example, the length in the vertical direction is preferably 50 to 140 mm, more preferably 50 to 120 mm, and particularly preferably 70 to 100 mm. The lateral length is preferably 100 to 210 mm, more preferably 130 to 200 mm, and particularly preferably 160 to 190 mm.
In the case of a three-dimensional mask such as a pleated mask, the length in the vertical direction is preferably 120 to 250 mm, more preferably 140 to 220 mm, and particularly preferably 160 to 190 mm. preferable.

  Examples of the material of the ear hook 45 include woven fabric, nonwoven fabric, or knitted string made of urethane fiber, nylon fiber, polyester fiber, polypropylene fiber, or the like.

The mask 40 of the present invention can be provided with a mouse bar or a nose fitter according to the purpose. The mouse bar is provided at the center of the mask main body 41 to maintain the three-dimensional shape of the mask 40, and the nose fitter is provided at the upper side portion of the mask main body 41 in order to bring the mask 40 into close contact with the user's nose. As the mouse bar or nose fitter, a tape made of metal, polyethylene, polypropylene, or the like can be used.
Furthermore, the mask 40 of the present invention can be laminated with a melt blown nonwoven fabric for preventing invasion of bacteria / virus droplets, pollen, etc., an antibacterial sheet for suppressing the growth of bacteria, and the like.
Although FIG. 7 illustrates a three-dimensional mask as the shape of the mask body 40, the mask body may be a planar mask. From the viewpoint of usability, a three-dimensional mask is preferable. For three-dimensional masks, pleated masks or masks that have been pleated in the lateral direction on the mask body made of non-woven fabric etc. so that the mask body deforms into a three-dimensional shape when used and fits the shape of the face A three-dimensional mold mask or the like in which two sheet members are joined like a palm in the center of the main body is preferable.

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

Example 1
Absorbent sheet 10 (50 mm × 80 mm: thickness 6 mm: basis weight 500 g / m ² ) and pleated mask 40 (90 mm × 175 mm before pleat deployment, 170 mm × 175 mm after pleat deployment) were prepared.
The absorbent sheet was manufactured by an airlaid method using pulp, polyethylene, and polypropylene.
Eleven air holes (circular: 6 mm in diameter) were formed on the entire surface of the absorbent sheet so as to have the arrangement shown in FIG.

  The pleated mask is formed by laminating the nonwoven fabric 42b, the breathable and hardly permeable mesh films 43b, 43a, and the nonwoven fabric 42a in this order from the inside to the outside of the mask, and then performing pleating. Then, a mask body 41 having an absorbent sheet accommodating pocket portion 44 was prepared.

  The absorbent sheet 10 was impregnated with 8 g of water as a water retention liquid, and stored in the pocket portion 44 of the mask body 41, and used in the next evaluation test (Test Example 1 and Test Example 2).

[Test Example 1] (Evaluation test of humidity in the mask)
The pleated mask 40 obtained in Example 1 was made into a three-dimensional shape, a thermo-hygrometer (SK-L200THIIα: Sato Meters Co., Ltd.) was attached inside, and the change in relative humidity in the mask was measured at 1 minute intervals.
The result is shown in FIG.

  From FIG. 10, it was confirmed that in the mask of the present invention, the humidity inside the mask is likely to increase, and the high relative humidity is maintained for a long time.

Comparative Example 1
It was formed in the same manner as in Example 1 except that the position of the vent holes (diameter 6 mm) of the absorbent sheet was arranged as shown in FIG. That is, five rows of vent holes in which one or more vent holes 51 are arranged and formed are formed on the same row in the longitudinal direction of the absorbent sheet 50. On the other hand, three rows of vent holes in which five or less vent holes 51 are arranged and formed are formed on the same row in the horizontal direction. That is, fewer than two vent holes 51 are formed on the same column in the vertical direction of the absorbent sheet 50, and more than two vent holes 51 are formed on the same row in the horizontal direction. ing.

[Test Example 2] Evaluation test when the absorbent sheet is accommodated in the mask When the absorbent sheet of Example 1 and Comparative Example 1 is impregnated with 8 g of water as a water retention liquid and accommodated in the pocket 44 of the mask body 41 Ease of evaluation was evaluated by 5 adult men according to 5 criteria. The results are listed in Table 1.

  From this result, since the absorptive sheet of this invention was easy to insert in the pocket part 44 of the mask main body 41, it was confirmed that the accommodation property is favorable.

[Test Example 3] Evaluation test after wearing a mask The mask of Example 1 or Comparative Example 1 was worn on adult males (5 persons) before going to bed. The state of the throat and the feeling of mask adhesion when waking up the next morning were evaluated according to five criteria. The results are shown in Tables 2 and 3.

  From this result, it was confirmed that when the mask with the absorbent sheet of the present invention was used, the state of the throat at the time of waking up the next morning was moistened, and the feeling of adhesion of the mask was also good.

Production Example 1
Absorbent sheet 10 (40 mm × 70 mm: thickness 5 mm: basis weight 600 g / m ² ) and pleated mask 40 (75 mm × 160 mm before pleat deployment, 160 mm × 160 mm after pleat deployment) were prepared.
The absorbent sheet was manufactured by an airlaid method using pulp and polyethylene (85:15 (mass ratio)).
Thirty vent holes (oval shape: major axis 5 mm, minor axis 4 mm) were formed on the entire surface of the absorbent sheet so as to have the arrangement shown in FIG.

Production Example 2
Absorbent sheet 10 (60 mm × 90 mm: thickness 7 mm: basis weight 400 g / m ² ) and pleated mask 40 (100 mm × 185 mm before pleat deployment, 180 mm × 185 mm after pleat deployment) were prepared.
The absorbent sheet was manufactured by an airlaid method using pulp and polypropylene (90:10 (mass ratio)).
Sixteen vent holes (small rectangular major axis 5 mm, minor axis 3 mm + large rectangular major axis 10 mm, minor axis 5 mm) were formed on the entire surface of the absorbent sheet so as to have the arrangement shown in FIG.
The absorbent sheets of Production Examples 1 and 2 were easy to insert a pleated mask and had good accommodation. In addition, it was confirmed that the mask of the present invention easily increases the humidity in the mask and maintains a high relative humidity for a long time. Moreover, when the mask which inserted the absorbent sheet of manufacture example 1 and 2 was used, the state of the throat at the time of awakening of the next morning was moistened, and it was confirmed that the feeling of contact | adherence of a mask is also favorable.

10, 20, 30, 50, 60, 70, 80, 90, 110: Absorbent sheet 11, 21, 31, 51, 61, 71, 81, 91, 111: Vent 40: Mask 41: Mask body 42a, 42b: Woven or nonwoven fabric 43a, 43b: Mesh film 44 having air permeability and poor water permeability: Pocket portion 45: Ear hook portion

Claims (9)

An absorbent sheet for a mask that can hold a water retention liquid,
The absorbent sheet is provided with a plurality of rows of vent holes in which two or less vent holes are arranged and formed on the same row in the horizontal direction when mounted on a mask. .   2. The absorbent sheet according to claim 1, further comprising a plurality of ventilation hole rows in which two or more ventilation holes are arranged and formed on the same row in the vertical direction when mounted on a mask. The absorbent sheet as described.   The absorbent sheet according to claim 1 or 2, wherein the number of vent holes formed on the same row in the row of vent holes is two or three.   The absorbent sheet according to claim 1, wherein the number of the vent hole rows is 3 to 7 rows.   The absorptive sheet according to any one of claims 1 to 4, wherein the absorptive sheet has a substantially rectangular shape having no corners at least on the lower side.   The absorptive sheet of any one of Claims 1-5 which hold | maintains 3-20 g of water retention liquid.   The mask provided with the absorptive sheet of any one of Claims 1-6.   The mask according to claim 7, wherein the absorbent sheet is inserted and mounted between mesh films provided in the mask main body and having air permeability and poor water permeability.   8. The absorbent sheet is inserted and mounted in a pocket portion having an opening in the upper portion formed inside or outside the mask body with a mesh film having air permeability and poor water permeability. Or the mask of 8.

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