TW202135693A - Mask - Google Patents

Abstract

The present invention provides a mask which is less likely to feel wet to the wearer. A mask (1) according to the present invention comprises a skin-side sheet (21) which is made of a hydrophilic non-woven fabric and a filter sheet (22) which is made of a non-woven fabric and which is laminated on the skin-side sheet (21), and is characterized in that the mean deviation of the surface roughness of the non-skin-side surface of the skin-side sheet (21) is not more than 3.30 [mu]m and the distance between constituent fibers of the skin-side sheet (21) is greater than the distance between constituent fibers of the filter sheet (22).

Description

Facial mask

The present invention relates to disposable masks.

Disposable masks made of multiple layers of non-woven fabrics are widely used for the purpose of preventing germs, pollen, and fine particulate matter as countermeasures. Such masks have received increased awareness of hygiene and beauty in recent years, and they have begun to be worn for a long time. With this situation, the wearer’s skin is uncomfortable when water droplets caused by sweat and exhalation on the inside of the mask touch the wearer’s skin. Feeling will become a problem.

Regarding masks that deal with such problems, Patent Document 1 proposes a mask provided with a mask body and ear hooks provided on the left and right sides of the mask body. Among them, the aforementioned mask body is It is formed by a layer of at least two non-woven fabrics of the mouth layer that is in contact with the face of the wearer and the filter layer of the mouth layer, and the mouth layer has a moisture evaporation rate of 40% The above, and the moisture absorption per unit area in the moisture diffusion region is formed of a non-woven fabric ^{of 80 μg/mm 2 or more.} The mask of Patent Document 1 can reduce the uncomfortable feeling caused by the stuffiness inside the mask and the sticky skin while exhibiting high particle collection efficiency. [Prior Technical Documents] [Patent Documents]

[Patent Document 1] JP 2017-166099 A

[Problem to be solved by invention]

Although the mask of Patent Document 1 absorbs the moisture contained in sweat and exhalation by the non-woven fabric forming the mouth layer to reduce the contact of water droplets on the wearer’s skin, it is because the non-woven fabric forming the mouth layer is continuously maintained. Therefore, the wearer will feel wet, and as a result, there will be concerns about discomfort.

Here, the object of the present invention is to provide a mask that does not easily give the wearer the feeling of getting wet. [Technical means to solve the problem]

The mask of one aspect (aspect 1) of the present invention is the aforementioned mask in which a skin-side sheet formed of a hydrophilic non-woven fabric and a filter sheet formed of a non-woven fabric are laminated, and is characterized by: The average deviation of the surface thickness of the non-skin side of the skin-side sheet is 3.30 μm or less, and the inter-fiber distance of the constituent fibers of the skin-side sheet is larger than the inter-fiber distance of the constituent fibers of the filter sheet.

The mask of this aspect can absorb moisture contained in sweat and exhalation by the hydrophilic non-woven fabric forming the skin-side sheet, so it can reduce the contact of water droplets on the wearer's skin. Furthermore, since the mask of this aspect has an average deviation of the surface thickness of the skin-side sheet and the non-skin-side surface of 3.30μm or less, it is difficult to form a gap between the skin-side sheet and the filter sheet, and the two sheets can be brought into close contact. The inter-fiber distance of the constituent fibers of the skin-side sheet is larger than the inter-fiber distance of the constituent fibers of the filter sheet. Therefore, the moisture absorbed by the skin-side sheet can quickly migrate to the non-skin-side filter sheet by capillary phenomenon. Based on the above, since the skin-side sheet of the mask of this aspect is easy to absorb moisture, it is difficult to retain moisture, so it is difficult for the wearer to feel wet.

Furthermore, in another aspect (aspect 2) of the present invention, in the mask of the aforementioned aspect 1, the fiber diameter of the constituent fibers of the skin-side sheet is 13 μm or less.

In the mask of this aspect, since the fiber diameter of the constituent fibers of the skin-side sheet is small, the skin-side sheet is easier to adhere to the filter sheet. Therefore, the moisture absorbed by the skin-side sheet can be more reliably transferred to the non-skin-side filter sheet.

In yet another aspect (aspect 3) of the present invention, in the mask of aspect 1 or 2, the non-woven fabric forming the aforementioned filter sheet is a non-woven fabric subjected to electret processing.

In the mask of this aspect, the filter sheet is made of non-woven fabric that has been processed with electrets. The adhesion between the filter sheet and the skin-side sheet is improved, so the moisture absorbed by the skin-side sheet can be more quickly transferred to the non-skin side. Thin slices.

In yet another aspect of this creation (aspect 4), in the mask of any one of the aforementioned aspects 1 to 3, the non-skin side of the skin-side sheet is made of a hydrophilic non-woven fabric that forms the skin-side sheet Formed by the mesh surface.

In the mask of this aspect, the fiber density of the skin-side sheet becomes higher toward the non-skin side, so the moisture absorbed by the skin-side sheet can be transferred to the non-skin side filter sheet more reliably.

In yet another aspect of the present invention (aspect 5), in the mask of any one of the aforementioned aspects 1 to 4, a non-skin layer made of a hydrophilic non-woven fabric is laminated on the non-skin side of the filter sheet Side slices.

In the mask of this aspect, since the non-skin side sheet can absorb the moisture that migrates to the filter sheet, it can make the wearer more surely less likely to feel wet.

In yet another aspect of the present invention (aspect 6), in the mask of aspect 5, the non-skin-side sheet has a fiber density lower than that of the skin-side sheet.

The mask of this aspect has a low fiber density in the non-skin side sheet, so that the air circulation caused by exhalation and the like is good, and the evaporativeness can be improved.

In yet another aspect of the present invention (aspect 7), in the mask of aspect 5 or 6, the non-skin side of the non-skin-side sheet is formed by the mesh surface of the hydrophilic nonwoven fabric forming the non-skin-side sheet form.

In this aspect of the mask, the non-skin side sheet is formed of hydrophilic non-woven fabric, so it is easy to absorb the moisture that migrates to the filter sheet as described above, because the non-skin side sheet is formed by the mesh surface with high fiber density. The non-skin side, so the absorbed water easily migrates to the non-skin side, and the water can evaporate more reliably.

In yet another aspect (aspect 8) of the present invention, in the mask of any one of aspects 1 to 7, the aforementioned mask is a pleated mask having a plurality of folds.

In the mask of this aspect, since at least the skin-side sheet is folded together with the filter sheet in a plurality of folds to be in close contact, the moisture absorbed by the skin-side sheet can be more surely transferred to the non-skin-side filter sheet. [Effects of the invention]

According to the present invention, it is possible to provide a mask that does not easily give the wearer the feeling of being wet.

Hereinafter, a suitable embodiment of the mask of the present invention will be described in detail with reference to the drawings.

In addition, if there is no particular emphasis on the various directions used in this specification, it is as follows. In this specification, the "up and down direction" is a direction corresponding to the up and down direction when the mask is worn, and the "lateral" is a direction that corresponds to the left and right direction when the mask is worn, and these directions are orthogonal to each other. For example, in the case of a pleated or flat mask, the longitudinal direction of the substantially rectangular mask body having the longitudinal direction and the width direction corresponds to the lateral direction, and the width direction corresponds to the vertical direction. Also in this manual, if there is no particular emphasis, in the thickness direction of the mask, the “proximal side relative to the wearer’s skin when the mask is worn” is referred to as the “skin side”, and the “mask’s side” is referred to as the “skin side” When it is worn, the "distal side opposite to the skin surface of the wearer" is referred to as the "non-skin side". In connection with this, the "skin-side surface" and the "non-skin-side surface" of the mask and the various members (such as skin-side sheet, filter sheet, non-skin-side sheet, etc.) constituting the mask are simply referred to as "skin "Side" and "Non-skin side".

[Facial mask] Fig. 1 is a plan view of a disposable mask 1 according to an embodiment of the present invention. Fig. 2 is an end view of a cross-section taken along the II-II line of the mask 1 in Fig. 1 and Fig. 3 is a form of the mask 1 An enlarged cross-sectional view of a main part of a laminate of non-woven fabrics of the mask body 2. As shown in FIG. 1, the disposable mask 1 of one embodiment of the present invention is composed of a mask body 2 and a pair of ear hooks 3. The mask body 2 has a When covering the wearer’s nose and mouth, the pair of ear hooks 3 are connected to both sides of the mask body 2 in the horizontal direction H, and have ears that hang on the wearer when wearing Ring shape.

Further, the mask portion of the mask body 1 as shown in FIG. 2, by having the skin-side sheet by a T bit hydrophilic skin-side non-woven fabric ₁ formed in the thickness direction T of 21 laminated from the skin-side sheet bits A filter sheet 22 formed of a non-woven fabric on the non-skin side T ₂ of 21, and a non-skin side sheet 23 formed of a hydrophilic non-woven fabric _{on the non-skin side T 2 of the filter sheet 22 is formed by a laminate of a non-woven fabric} Furthermore, as shown in Figures 1 and 2, the mask body 2 is equipped with a nose that is arranged along the lateral direction H at the upper end of the mask body 2 and can be deformed to fit the shape of the upper nose of the wearer. A nose fit part and a plurality of fold parts 4 formed by folding the above-mentioned laminate of non-woven fabrics in the vertical direction V.

Furthermore, in the mask 1 of the present embodiment, the average deviation of the surface thickness of the non-skin side of the skin-side sheet 21 is 3.30 μm or less, and the inter-fiber distance of the constituent fibers of the skin-side sheet 21 is greater than that of the constituent fibers of the filter sheet 22 The distance between them is greater.

Here, the average deviation of surface thickness (SMD) can be based on the commonly known characteristic value of KES manufactured by Kato Technology Co., Ltd. (Reference: Standardization and Analysis of Tactile Evaluation (2nd Edition), author Kawabata Yoshio (Issued on July 10, Showa 55) The measurement was performed as a characteristic value indicating the tactile feel of the surface of the sheet. Specifically, the average deviation (SMD) of the surface thickness can be measured in the following manner.

＜Method of measuring the average deviation of surface thickness (SMD)＞ Cut a sample piece with a square shape of 100mm in length x 100mm in width from anywhere on the sheet (non-woven fabric) to be measured, and set it on the surface testing machine KES-FB-4A manufactured by Kador Technology (Stock). The friction terminal applied with a predetermined load (for example, 25gf, etc.) slides on the sample piece at a predetermined speed (for example, 1.0mm/sec, etc.), and the average deviation of the surface thickness can be measured: SMD (μm). The average deviation (SMD) of the surface thickness is calculated as the average value of the SMD value in the MD direction and the SMD value in the CD direction (that is, (SMD value in the MD direction + SMD value in the CD direction)/2). In addition, the measurement of the average deviation of surface thickness (SMD) was performed in an environment of room temperature 20°C and humidity 60%, and the average value of the values measured at any 5 locations of the above-mentioned sample piece was used.

In addition, the inter-fiber distance of the constituent fibers of each of the skin-side sheet 21 and the filter sheet 22, that is, the inter-fiber distance of the non-woven fabric can be obtained in the following manner.

<Method for measuring the distance between fibers> Cut a 5cm square sample piece from any part of the measurement target sheet (non-woven fabric), and use a microscope (VHX-2000 manufactured by KEYENCE, open lens VH-Z20W aperture) 3D image linking function After obtaining a 200 times magnified image with the same focus from the surface of the sample piece to a depth of 100μm, extract the outer side of the fiber with the same focus based on the magnified image, use the surface formed there as the fiber space, and measure the area using a microscope The function calculates the area occupied by the fiber space. At this time, the observation object of the sample piece is arbitrarily selected, and the area of the fiber space in the selected range is measured at 100 locations. From the area A [fiber space area (average value)] of each fiber space in the selected range, the fiber space diameter (r) is calculated by the following formula (1), and the fiber space diameter (r ) Is the distance between fibers (μm).

As in the mask 1 of the present embodiment described above, the hydrophilic non-woven fabric forming the skin-side sheet 21 can absorb moisture contained in sweat and exhalation. Therefore, it is possible to reduce the contact of water droplets on the wearer's skin. Furthermore, since the mask 1 has an average deviation of the surface thickness of the non-skin side of the skin-side sheet 21 of 3.30 μm or less, it is difficult to form a gap between the skin-side sheet 21 and the filter sheet 22, and the two sheets can be brought into close contact. Since the inter-fiber distance of the constituent fibers of the skin-side sheet 21 is greater than the inter-fiber distance of the constituent fibers of the filter sheet 22, the moisture absorbed by the skin-side sheet 21 can be quickly transferred to the non-skin side T ₂ by capillary phenomenon.滤片22。 Filter sheet 22. In this way, since the skin-side sheet 21 of the mask 1 of the present embodiment is easy to absorb moisture, and it is difficult to retain moisture, it is difficult for the wearer to feel wet.

Hereinafter, various members constituting the mask of the present invention will be described in further detail using the mask 1 of the above-mentioned embodiment.

[Mask body part] In the above-mentioned mask 1, the mask main body 2 which covers the nose and mouth of the wearer at the time of wearing, as shown in FIG. 1, has a substantially rectangular shape in a plan view. In addition, the shape of the mask body 2 is not particularly limited as long as it can cover the nose and mouth of the wearer. For example, any shape such as a rectangular shape, an oblong shape, a triangular shape, and a polygonal shape can be adopted.

Further, the mask body 2 shown in Figure 3, is by 21, located on the skin side by the sheet thickness direction T in a non-skin layer laminated on the skin-side sheet located on the skin side of _a T hydrophilic non-woven fabric formed of 21 22, and is located in the non-skin side of the filter sheet 22 T hydrophilic non-woven fabric ₂ formed on the non-skin-side sheet side of the filter sheet T of non-woven fabric ₂ is formed from a laminate non-woven fabric 23 is formed. In addition, the skin-side sheet 21, the filter sheet 22, and the non-skin-side sheet 23 are arranged at the two ends of the mask body 2 in the vertical direction V and the two ends in the horizontal direction H. The parts are welded to each other.

In the present invention, the laminate of the non-woven fabric forming the mask body is not particularly limited as long as at least two non-woven fabrics of the skin side sheet formed of a hydrophilic non-woven fabric and a filter sheet formed of the non-woven fabric are laminated, except for the above In addition to the three-layer non-woven fabric laminate of the embodiment, for example, it may be a two-layer non-woven fabric laminate in which a skin-side sheet and a filter sheet are laminated, and may be in addition to the skin-side sheet, filter sheet, and non-woven fabric. In addition to the skin-side sheet, a sheet made of one or more sheets of arbitrary non-woven fabric (for example, an intermediate sheet arranged between the filter sheet and the non-skin-side sheet) is laminated with 4 or more layers of non-woven fabrics. body.

In addition, in the above-mentioned mask 1, the mask body 2 is shown in FIGS. 1 and 2, although it is provided with a nose that is located at the upper end of the mask body 2 and can be changed into a shape suitable for the upper part of the nose of the wearer. The lamination part and the above-mentioned non-woven fabric laminate body are folded in the vertical direction V into a plurality of fold parts 4. However, since the mask of the present invention is not an essential constituent element, the mask body may not have such a nose sticker Joint part, multiple fold parts.

Hereinafter, various sheets forming the mask body 2 will be described in detail.

(Skin side sheet) In the above-mentioned mask 1, the skin side sheet 21 is _{a hydrophilic non-woven fabric that is arranged on the skin side T 1 of the} mask body 2 and can absorb moisture contained in the wearer's sweat and breath Formed. Since the skin-side sheet 21 is formed by the hydrophilic nonwoven fabric, the mask 1 can reduce the contact of water droplets on the wearer's skin.

In addition, the skin-side sheet 21 has an average deviation of the surface thickness of the non-skin side surface of 3.30 μm or less, and the inter-fiber distance of the constituent fibers of the skin-side sheet 21 is greater than the inter-fiber distance of the constituent fibers of the filter sheet 22. In this way, the average deviation of the surface thickness of the non-skin side of the skin-side sheet 21 is 3.30 μm or less. Therefore, a gap is not easily formed between the skin-side sheet 21 and the filter sheet 22, and the two sheets can be brought into close contact. Furthermore, the inter-fiber distance of the constituent fibers of the skin-side sheet 21 is greater than the inter-fiber distance of the constituent fibers of the filter sheet 22, so the moisture absorbed by the skin-side sheet 21 can be quickly filtered _{to the non-skin side T 2 via capillary phenomena.} The sheet 22 moves.

The hydrophilic nonwoven fabric forming the skin-side sheet 21 is not particularly limited except for the above-mentioned average deviation of the surface thickness and the inter-fiber distance of the constituting fibers, and any hydrophilic nonwoven fabric can be used. For such hydrophilic non-woven fabrics, there are: water needle non-woven fabrics, hot-air non-woven fabrics, spunbonded non-woven fabrics, air-flow forming non-woven fabrics, melt-blown non-woven fabrics, flash spun non-woven fabrics formed of hydrophilic fibers or subjected to hydrophilization treatment. , Heat-bonded non-woven fabrics, carded non-woven fabrics, or non-woven fabrics in which these non-woven fabrics are arbitrarily combined (such as SMS non-woven fabrics, etc.), etc., but spun-bonded non-woven fabrics are preferable from the point of strength and processability.

In addition, the fibers constituting the nonwoven fabric are not particularly limited as long as they do not inhibit the effects of the present invention, and examples thereof include cellulose fibers and synthetic fibers. For cellulose fibers, for example, natural cellulose fibers such as pulp, cotton, and hemp; regenerated cellulose fibers such as rayon, lyocell fiber, cupra rayon, etc., such fibers One type of fiber may be used alone, or two or more types of fibers may be used in combination. In addition, synthetic fibers include: polyolefin fibers such as polyethylene (PE) and polypropylene (PP); polyethylene terephthalate (PET), polypropylene terephthalate Polyester fibers such as (PTT); polyvinyl alcohol fibers such as vinylon; polypropylene fibers such as polyacrylonitrile; polyurethane (PU) fibers; polyamide-based fibers such as Nylon, etc., etc. One type of fiber may be used alone, or two or more types of fibers may be used in combination. Furthermore, the form of synthetic fibers is not particularly limited. For example, PP (core)/PE (sheath), high melting point PP (core)/low melting point PP (sheath), PET (core) can be used. /PE (sheath) and other core-sheath composite fibers; side-by-side composite fibers; synthetic fibers in any shape such as flat, Y-shaped, C-shaped, and other profiled cross-sectional fibers. In addition, when the non-woven fabric is formed of hydrophobic synthetic fibers, the synthetic fibers before the non-woven fabric formation may be hydrophilized by a hydrophilization treatment agent or the like, or the non-woven fabric after the formation may be hydrophilized by a hydrophilization treatment agent. Just deal with it.

Moreover, in the present invention, it is preferable that the constituent fibers of the skin-side sheet have a fiber diameter of 13 μm or less. In this way, when the fiber diameter of the constituent fibers of the skin-side sheet is small and the skin-side sheet is more easily adhered to the filter sheet, the moisture absorbed by the skin-side sheet can be more reliably transferred to the non-skin-side filter sheet.

In addition, the fiber diameter of the constituent fibers of the non-woven fabric can be measured by observing the fibers in magnification using a scanning electron microscope. Specifically, the measurement can be performed in the following manner.

＜Method of measuring fiber diameter＞ (1) Cut out 10 sample pieces having a square shape of 5 mm in length x 5 mm in width from an arbitrary place on the sheet (nonwoven fabric) to be measured. (2) Observe the surface of the cut sample piece with a scanning electron microscope (VE-7800 manufactured by KEYENCE), and obtain a magnified image of the surface of the sample piece with a magnification of 500 times. In addition, the magnified image was made into one piece for each sample piece to obtain a total of 10 pieces. (3) Measure the fiber diameter of a predetermined number (for example, 10) of fibers on the outermost surface in each enlarged image. (4) The value of the total fiber diameter of each fiber after the measurement is divided by the number of fibers measured as the fiber diameter (average fiber diameter; μm).

Furthermore, in the present invention, the non-skin side of the skin-side sheet is preferably formed by the net surface of the hydrophilic nonwoven fabric forming the skin-side sheet. In this way, if the non-skin side of the skin-side sheet is formed by the mesh surface, the skin-side sheet faces the non-skin side and the fiber density becomes higher. Therefore, the moisture absorbed by the skin-side sheet can be more surely transferred to the non-skin side filter Thin slices.

In addition, the mesh surface of the nonwoven fabric is the surface contacting the support (net) of the conveying equipment during the manufacture of the nonwoven fabric. Compared with the surface on the opposite side (that is, the opposite mesh surface), the mesh surface is specified as the fiber that constitutes the fiber. A roughly uniform surface with high density and less unevenness.

The thickness, basis weight, etc. of the skin-side sheet are not particularly limited as long as they do not hinder the effects of the present invention. Although any thickness, basis weight, etc. can be used, the average deviation from the above-mentioned surface thickness and the distance between fibers are not particularly limited. In terms of ease of adjustment, strength, flexibility, etc., a basis weight in the range of 10 g/m ² to 100 g/m ² is ideal, and a basis weight in the range of 15 g/m ² to 80 g/m ² is more desirable. . In addition, the basis weight can be measured as follows.

<Method for Measuring Basis Weight> From any place on the measurement target sheet (nonwoven fabric), 10 square test pieces of 2 cm in length × 2 cm in width were cut out, and the mass (g) of each sample piece was measured with an electronic balance. Next, the basis weight (g/m ² ) of the sample piece was calculated by dividing the measured mass (g) by the area (m ^{2) of the sample piece.} In addition, the basis weight can be an average value of 10 sample pieces.

(Filter sheet) In the mask 1 described above, the filter sheet 22 is positioned on the non-skin side T ₂ of the skin-side sheet 21 of the mask body 2 and is sandwiched by the skin-side sheet 21 and the non-skin-side sheet 23. Such a filter sheet 22 is capable of capturing germs, bacteria, dust, pollen, fine particulate matter (such as PM2.5, etc.) that pass through the non-skin side sheet 23 together with air (hereinafter simply referred to as "micro Matter".) is formed by non-woven fabrics.

The filter sheet 22 is formed by the inter-fiber distance of the constituent fibers being smaller than the inter-fiber distance of the constituent fibers of the skin-side sheet 21. Thereby, the filter sheet 22 can quickly absorb the moisture absorbed by the skin-side sheet 21 due to the capillary phenomenon while exhibiting the ability to capture the above-mentioned minute substances.

The non-woven fabric forming the filter sheet 22 is not particularly limited except for the points of the inter-fiber distance of the constituent fibers described above, and any non-woven fabric corresponding to the desired catchability and the like can be used. As such a nonwoven fabric, the same nonwoven fabric as the hydrophilic nonwoven fabric forming the skin-side sheet described above is mentioned, but the filter sheet is preferably a hydrophobic nonwoven fabric formed of a hydrophobic synthetic fiber. If the filter sheet is formed of such a hydrophobic non-woven fabric, it can exhibit better evaporability. In addition, for hydrophobic synthetic fibers, it is desirable to use polyolefin fibers such as PE and PP.

Furthermore, in the present invention, it is preferable that the nonwoven fabric forming the filter sheet is a nonwoven fabric to which electret processing is applied. If the filter sheet is formed of a non-woven fabric treated with electrets, the electrostatic force can exhibit excellent trapping properties for fine substances, and the adhesion between the filter sheet and the skin-side sheet is improved, so that the skin side The moisture absorbed by the sheet moves more quickly to the filter sheet on the non-skin side.

In addition, electret processing is a process of injecting electric charges into the non-woven fabric as a dielectric by a method such as direct current corona discharge or high electric field. The charge injected into the non-woven fabric may mainly exist near the surface of the constituent fibers of the non-woven fabric. The amount of charge injected into the nonwoven fabric can be adjusted according to the conditions of direct current corona discharge and high electric field application, but it can also be adjusted by the fiber diameter and fiber density of the constituent fibers of the nonwoven fabric.

In addition, the thickness, basis weight, etc. of the filter sheet are not particularly limited as long as they do not hinder the effects of the present invention. Although arbitrary thickness, basis weight, etc. can be adopted, the ease of adjustment of the inter-fiber distance described above, In terms of capturing properties of fine substances, a basis weight in the range of 15 g/m ² to 200 g/m ² is preferable, and a basis weight in the range of 12 g/m ² to 150 g/m ² is more preferable.

(Non-skin side sheet) In the above-mentioned mask 1, the non-skin side sheet 23 is positioned on the non-skin side T _{2 of the} mask body 2, more specifically, is positioned on the non-skin side T of the filter sheet 22. _2, can be located in the filter with the skin-side sheet 22 of the skin-side sheet T ₁ 21 and sandwich the sheet 22 to be filtered with a hydrophilic nonwoven fabric formed remains.

The hydrophilic nonwoven fabric forming the non-skin side sheet 23 is not particularly limited as long as it does not hinder the effects of the present invention, and any nonwoven fabric corresponding to desired strength, flexibility, etc. can be used. Examples of such non-woven fabrics include the same non-woven fabrics as the hydrophilic non-woven fabrics forming the skin-side sheet described above.

In addition, in the present invention, the non-skin side sheet is not limited to the hydrophilic non-woven fabric, and may be formed of the same hydrophobic non-woven fabric as the filter sheet, but the mask 1 of the above-mentioned embodiment is preferably formed of the hydrophilic non-woven fabric. If the non-skin side sheet located on the non-skin side of the filter sheet is formed by the hydrophilic non-woven fabric. Since the non-skin side sheet can absorb the moisture that migrates to the filter sheet, the wearer can be more surely less likely to feel wet.

Furthermore, in the present invention, it is desirable that the fiber density of the non-skin-side sheet is lower than the fiber density of the skin-side sheet. If the fiber density of the skin-side sheet is not low, the circulation of air due to exhalation and the like is good, and the evaporability can be improved. In addition, the fiber density can be measured as follows.

<Method for Measuring Fiber Density> (1) According to the above-mentioned <Method for Measuring Basis Weight>, the basis weight of each sample piece (that is, 10 sample pieces) cut out from the sheet (nonwoven fabric) to be measured is measured. (2) Use ^{a thickness gauge with a gauge head of 15 cm 2} (model FS-60DS manufactured by Daiei Chemical Seiki Mfg. Co., Ltd.) to measure the basis weight under the condition of a measuring load of ^{3 g/cm 2} The thickness of each sample piece. In addition, the thickness of the sample piece is measured by measuring the thickness of three arbitrary places of the sample piece, and the average value is used. ^{(3) Calculate the fiber density (g/m 3} ) of each sample piece by dividing the basis weight of each sample piece measured in (1) above by the thickness of each sample piece measured in (2) above. In addition, the fiber density can be an average value of 10 sample pieces.

Furthermore, in the present invention, the non-skin side of the non-skin-side sheet is preferably formed by the net surface of the hydrophilic nonwoven fabric forming the skin-side sheet. As mentioned above, since the non-skin side sheet is formed of a hydrophilic nonwoven fabric, the non-skin side sheet can easily absorb the moisture that migrates to the filter sheet. If the non-skin side sheet is formed by a mesh surface with high fiber density, On the non-skin side, the absorbed water easily migrates to the non-skin side, and the water can evaporate more reliably.

The thickness, basis weight, etc. of the non-skin side sheet are not particularly limited as long as they do not hinder the effects of the present invention. Although any thickness, basis weight, etc. can be adopted, the basis weight is The basis weight in the range of 10 g/m ² to 100 g/m ² is preferable, and the basis weight in the range of 15 g/m ² to 80 g/m ² is more preferable.

In addition, in the present invention, since the mask has a non-skin-side sheet and is not an essential constituent element, for example, when the skin-side sheet and the filter sheet are firmly joined and the filter sheet can be sufficiently supported by only the skin-side sheet, the mask does not It is also possible to have non-skin side flakes.

[Earhook Department] In the above-mentioned mask 1, a pair of ear hooks 3, which are hung on the wearer’s ears when put on, makes the mask body 2 and the wearer’s nose and mouth close to each other, as shown in Fig. 1, and has a flat ribbon shape. The both ends of the round or band-shaped stretchable member have an annular shape joined to both ends of the mask body 2 in the lateral direction H.

The stretchable member that can be used as the earhook 3 can be hung on the wearer’s ears so that the mask body 2 can be closely connected to the wearer’s nose and mouth without any special restrictions. For example, we can cite: woven Rubber, knitted rubber, stretchable non-woven fabric, etc. In addition, the stretchable member is preferably one that does not easily decrease in width (that is, does not easily shrink) even if it is stretched. If the ear hook is formed by a stretchable member that is not prone to such shrinkage, when the ear hook is hung on the wearer's ear, the width of the ear hook is not easy to narrow, because the ear hook and the wearing can be widely secured The area of the part where the wearer’s ear abuts, so the wearer’s ear is not easy to become painful.

In the above, the mask of the present invention has been described using the disposable mask 1 as one embodiment. However, the mask of the present invention is not so-called as having a plurality of folds 4 such as the mask 1 mentioned above. The pleated mask of is applicable to any masks such as a flat mask with a flat mask body and a three-dimensional mask with a three-dimensional structure such as a cup shape. However, if the mask of the present invention has a pleat-type mask with a plurality of folds, at least the skin-side sheet and the filter sheet are folded together in the plural folds to be in close contact, so it has a so-called skin-friendly state. The moisture absorbed by the side sheet moves more reliably to the non-skin side of the filter sheet.

In addition, the mask of the present invention is not limited by the above-mentioned embodiments and the like, and can be appropriately combined, substituted, changed, etc. within a range that does not deviate from the purpose and spirit of the present invention.

1: disposable mask 2: Mask body part 21: Skin side flakes 22: filter sheet 23: Non-skin side sheet 3: Earhook 4: Fold part

[Fig. 1] is a plan view of a disposable mask 1 according to an embodiment of the present invention. [Fig. 2] is an end view of a cross section taken along the II-II line of the mask 1 in Fig. 1. [Fig. [Fig. 3] Fig. 3 is an enlarged cross-sectional view of a main part of a laminate of non-woven fabric forming the mask body 2 of the mask 1.

1: disposable mask

2: Mask body part

3: Earhook

4: Fold part

Claims (8)

A mask is a mask in which a skin-side sheet formed by a hydrophilic non-woven fabric and a filter sheet formed by a non-woven fabric are laminated, characterized by: The average deviation of the surface thickness of the non-skin side of the skin-side sheet is 3.30 μm or less, and the inter-fiber distance of the constituent fibers of the skin-side sheet is larger than the inter-fiber distance of the constituent fibers of the filter sheet. The mask according to claim 1, wherein the fiber diameter of the constituent fibers of the skin-side sheet is 13 μm or less. The mask according to claim 1 or 2, wherein the non-woven fabric forming the filter sheet is a non-woven fabric subjected to electret processing. The mask according to any one of claims 1 to 3, wherein the non-skin side of the skin-side sheet is formed of a net surface of a hydrophilic nonwoven fabric forming the skin-side sheet. The mask according to any one of claims 1 to 4, wherein a non-skin side sheet formed of a hydrophilic nonwoven fabric is laminated on the non-skin side of the filter sheet. The mask according to claim 5, wherein the non-skin-side sheet has a fiber density lower than that of the skin-side sheet. The mask according to claim 5 or 6, wherein the non-skin side of the non-skin-side sheet is formed of a net surface of a hydrophilic nonwoven fabric forming the non-skin-side sheet. The mask according to any one of claims 1 to 7, wherein the aforementioned mask is a pleated mask having a plurality of folds.

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