JP2009106468A - Hygiene mask and its base material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mask base material cutting off airborne droplets containing pollen, dust and virus and having a low pressure drop and high catching efficiency, and a disposable hygiene mask using the same. <P>SOLUTION: This nonwoven fabric base material for hygiene masks consisting of at least three-layer laminated nonwoven fabric of an outer layer A-an inner layer B-an outer layer A, is characterized that the outer layers A are formed of a nonwoven fabric consisting of polyolefin staples or polyester staples, and the inner layer B is formed of a composite nonwoven fabric formed by combining polypropylene spun-bonded nonwoven fabric with melt-blown nonwoven fabric and the three layers are laminated and integrated together. This disposable hygiene mask is formed by using the same base material. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a disposable sanitary mask using a nonwoven fabric as a raw material and a base material thereof, and more particularly, to a sanitary mask and a base material thereof for cutting sprays containing pollen, dust and / or viruses with high collection efficiency with low pressure loss.

As a sanitary mask substrate, conventionally, the outermost layer is a spunbond nonwoven fabric as a protective material, the inner layer is a melt blown (MB) nonwoven fabric subjected to electret treatment, and the mouth layer (innermost layer) is spunbond or spunlace. Alternatively, a dry process nonwoven fabric is used.
In particular, when it becomes a pollen and dust mask, it will be worn for a long time when going out and indoors, and the comfort of wearing is especially emphasized.
Among these, easiness of breathing is the most important as a feeling of wearing, and a reduction in ventilation resistance, that is, pressure loss was a problem. When the ventilation resistance is high, breathing becomes difficult and nausea rises from the gap between the mask and the face and fogs the glasses. This also impairs the comfortable wearing feeling of the mask.

Moreover, in the conventional mask, the nonwoven fabric from which the above-mentioned manufacturing method differs is simply piled up, and the face cover part of a mask is formed. However, each of these three-layer base materials has a low weight per unit area and is not an integrated one, so there is a drawback that the “waist” (tension rigidity) necessary for the mask does not appear, and this is to be solved. Then, measures such as increasing the weight per unit of weight and adding a reinforcing body different from the nonwoven fabric have been taken.
If the “back” of the mask base material is small, it will be easily deformed during breathing during use, and therefore the proper distance between the nostril or lip and the mask cannot be maintained, and the mask will not adhere to the skin due to the moisture condensing from the breath. This leads to discomfort in wearing such as being in close contact with the skin. In order to make breathing easier, it is desirable to provide an appropriate space between the face and the mask. However, the conventional flat mask lacks “waist”, and the same applies to the three-dimensional mask. .
In addition, the mask in which the three layers are simply overlapped has a drawback in that the mouth layer peels off during use and is adsorbed to the mouth, giving an unpleasant feeling.

On the other hand, in filter efficiency and pressure loss as a mask, the melt blown (MB) nonwoven fabric layer used for the inner layer plays a dominant role, but many masks have a weight per unit area in the range of 15 to 25 g / m ^2. It is used. There is a strong demand for low-pressure loss to make breathing easier, but this is effective in reducing the weight of the melt-blown nonwoven fabric, but has a limit in winding the raw fabric. In addition, due to the low tensile strength when applying low-weight fabrics to laminate or electret processing, problems such as severe breakage of the nonwoven fabric and generation of wrinkles occur during the winding operation. There was also a difficulty in handling in the mask forming process. Also, in the mask manufacturing process, conventionally, different types of non-woven fabrics of 3 types and 3 layers of outer layer, inner layer, and mouth layer are handled, which is troublesome in processing workability and has a large loss in quality control. There was a problem that the production speed did not increase.

In order to solve the above problems, for example, low pressure loss and high collection property (filter efficiency), various masks and mask base materials have been proposed (for example, see Patent Documents 1 to 3). As a means for solving the problem, for example, in Patent Document 1, a V-shaped notch is provided on at least one of the upper side or the lower side of the center of the face cover, and both oblique sides of the notch are joined to form a three-dimensional object. A non-woven mask composed of a face covering part and an ear hooked part, and the face covering part is made of a continuous monolithic nonwoven fabric, and a collar part protruding upward is provided on the upper center side of the face covering part. A three-dimensional mask is disclosed, and from the viewpoint of bonding and joining methods of each layer, Patent Document 2 discloses that a mask body covering a wearer's nose and mouth is formed by a fiber sheet. In a disposable mask comprising a layer and an intermediate layer formed from an electret fiber sheet and interposed integrally between the inner and outer layers, each bonding surface between the inner and outer layers and the intermediate layer is intermittently interposed between the bonding surfaces. The hot melt adhesive is bonded to the intermediate layer of the intermediate layer with respect to the inner layer and the outer layer, and the amount of the hot melt adhesive attached to the intermediate layer of the inner layer and the outer layer of the intermediate layer The mask is characterized in that it is less than the adhesion amount of the adhesive, and further, in terms of the constituent material of each layer, in Patent Document 3, a mask having a three-dimensional shape that is worn so as to cover the nostril portion of the face The mask body is composed of a multilayer laminated nonwoven fabric, the outer layer portion of the laminated nonwoven fabric is a thermoplastic synthetic fiber nonwoven fabric, the inner layer portion is a regenerated cellulose fiber, and the content thereof is 15 to 40% by weight. There is disclosed a sanitary mask having a moisture retention of 7 to 13% at high humidity and an air permeability of 10 to 100 cc / cm ² / sec.
However, although the above-mentioned proposal has improved performance, it is still not sufficient, and there is a strong demand for a high-capacity mask that can efficiently collect pollen and low-pressure loss to ease breathing. What is being done is the actual situation.
JP 2007-54381A JP 2007-37737 A Japanese Patent Laid-Open No. 2007-276

  In view of the above-mentioned problems, an object of the present invention is to provide a mask substrate having a high collection efficiency with a low pressure loss and cutting a splash containing pollen, dust and / or virus, and a disposable sanitary mask using the same. is there.

  As a result of intensive studies to solve the above problems, the inventors of the present invention have integrated three layers of outer layer / inner layer / outer layer non-woven fabric by embossing to impart a “waist” to the mask substrate. By using an electret-treated spunbond / meltblown (SM) composite nonwoven fabric or spunbond / meltblown / spunbond (SMS) composite nonwoven fabric as the inner layer nonwoven fabric base material, and further reducing the weight of the inner layer meltblown nonwoven fabric The inventors have found that a low pressure loss and high trapping base material for a mask and a mask using the same can be obtained, and based on these findings, the present invention has been completed.

That is, according to the first invention of the present invention, a sanitary mask nonwoven fabric substrate comprising a laminated nonwoven fabric of at least three layers of outer layer (A) -inner layer (B) -outer layer (A),
The outer layer (A) is composed of a nonwoven fabric composed of polyolefin short fibers or polyester short fibers, and the inner layer (B) is composed of a composite nonwoven fabric in which a polypropylene spunbond nonwoven fabric and a melt blown nonwoven fabric are combined and laminated and integrated. A nonwoven fabric base material for sanitary masks is provided.
Moreover, according to the 2nd invention of this invention, the nonwoven fabric base material for sanitary masks characterized by the inside layer (B) being electret-treated in the 1st invention is provided.
Furthermore, according to the third invention of the present invention, there is provided a nonwoven fabric substrate for sanitary mask, wherein the laminated nonwoven fabric is subjected to electret treatment in the first invention.

According to a fourth invention of the present invention, in any one of the first to third inventions, the inner layer (B) has a total weight of 25 g / m ² or less and an air permeability of 60 cc / cm ² / sec or more. A nonwoven fabric base for a hygiene mask, wherein the total weight of the meltblown nonwoven fabric component is in the range of ² to 10 g / m2, and the average fiber diameter of the meltblown nonwoven fabric component is in the range of 3 to 15 μm. Material is provided.
According to the fifth invention of the present invention, in any one of the first to fourth inventions, the outer layer (A) forms the outermost layer and the mouth layer of the sanitary mask, and the basis weight of the outermost layer and the mouth layer. There are each 10 to 50 g / m ^2, and the outermost layer and the fibers constituting the mouth layer, sanitary mask, wherein at least one of the fiber fineness is selected from the range of 1 to 10 dtex are used A nonwoven substrate is provided.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the inner layer (B) is inserted between the outermost layer (A) of the outermost layer and the mouth layer, There is provided a non-woven fabric substrate for a sanitary mask characterized by being laminated and integrated using a sonic wave or a hot melt adhesive.
Furthermore, according to 7th invention of this invention, the sanitary mask characterized by using the nonwoven fabric base material for sanitary masks concerning the invention in any one of 1st-6th for a face cover part is provided.

  Since the nonwoven fabric base material for sanitary masks of the present invention has “waist” due to the above-described configuration, it exhibits excellent wear feeling, low pressure loss and high collection efficiency. Therefore, it can be suitably used as a sanitary mask base material, and as a result, a sanitary mask using the same has an effect of being excellent in wearing feeling, low pressure loss and high collection efficiency.

The non-woven fabric substrate for sanitary mask of the present invention is a non-woven fabric substrate for sanitary mask composed of three layers of non-woven fabric of outer layer (A) -inner layer (B) -outer layer (A), and outer layer (A) is a polyolefin. The inner layer (B) is composed of a composite nonwoven fabric in which a polypropylene spunbond nonwoven fabric and a melt blown nonwoven fabric are combined, and is laminated and integrated. Is.
Details will be described below for each item.

1. Outer layer (A)
In the nonwoven fabric base material for sanitary mask of at least three layers of outer layer (A) -inner layer (B) -outer layer (A) of the present invention, outer layer (A) is a nonwoven fabric composed of polyolefin short fibers or polyester short fibers. Consists of. The outer layer (A) refers to both the outermost layer and the mouth layer, and can be used for both.
Moreover, the short fiber nonwoven fabric of the outer layer (A) uses a hydrophilic spinning oil on its surface to prevent generation of unpleasant static electricity, absorb moisture contained in exhaled breath, and diverge to the outside. Gives you the comfort of wearing a mask.
Examples of the hydrophilic spinning oil include higher alcohols, higher fatty acids, alkylphenols, alkyl phosphate salts, alkyl sulfates, and the like, for example, on the surface of the short fiber nonwoven fabric by a method such as coating, spraying, or dipping. Can be applied or adhered.

In addition, as the above-mentioned polyolefin-based short fiber or polyester-based short fiber, the core portion / sheath portion has polypropylene (PP) / polyethylene (PE), polyethylene terephthalate (PET) / polyethylene (PE), polyethylene terephthalate (PET) / In addition to low melting point polyethylene terephthalate (PET) or polypropylene (PP) / polypropylene (PP), regular fibers composed of PP alone or PET alone are used.
One of these fibers or a mixed fiber is formed into a non-woven fabric by carding and heat treatment (for example, hot embossing roll). In order to increase “waist”, the selected fiber has a fineness of 1 to 10 dtex, Preferably, one or several kinds of fiber diameters of 2 to 6 dtex are mixed and used.
The short fiber nonwoven fabric of the outer layer (A) is characterized by a small pressure loss because the fiber diameter is larger than the melt blown (MB) nonwoven fabric used for the inner layer, and the fiber diameter can be increased. It is suitable for imparting.
If a fineness of 1 dtex or less is used frequently, the air permeability decreases, the pressure loss increases, and the “waist” of the nonwoven fabric becomes soft. If a fiber exceeding 10 dtex is used frequently, the texture becomes too hard, If the fiber is in contact with the skin, it gives a tingling sensation, which is not preferable.

The fibers of the outer layer (A) are made into a nonwoven fabric by forming a sheet by carding and joining the fibers by heat.
In the present invention, as the fiber material and structure, a core-sheath composite short fiber having a polyolefin component as a sheath is preferably used. As a specific example, one or a plurality of composite short fibers in which the sheath part is selected from either PE or PP and the core part is appropriately selected from PP, PET, or the like are used.

2. Inner layer (B)
In the nonwoven fabric base material for sanitary mask of at least three layers of outer layer (A) -inner layer (B) -outer layer (A) of the present invention, the inner layer (B) is a composite nonwoven fabric in which a polypropylene spunbond nonwoven fabric and a meltblown nonwoven fabric are combined. Specifically, as the composite nonwoven fabric, for example, a spunbond / meltblown (SM) composite nonwoven fabric, a spunbond / meltblown / spunbond (SMS) composite nonwoven fabric, a spunbond / spunbond / meltblown / spunbond (SSMS) ) Composite nonwoven fabric, spunbond / meltblown / meltblown / spunbond (SMMS) composite nonwoven fabric and the like. In addition, the composite nonwoven fabric may be used alone or in combination.

In the present invention, the basis weight of the melt blown (MB) nonwoven fabric component of the composite nonwoven fabric of the inner layer (B) is preferably prepared on the low basis weight side. As the sum of basis weight meltblown (MB) nonwoven component, 10 g / ^{m 2} or less, preferably 2 to 10 g / ^{m 2,} particularly preferably the basis weight by weight of 2-5 g / ^{m 2} is selected.
The melt blown (MB) nonwoven fabric dominates the pressure loss and the air permeability as well as the filter efficiency because the fiber diameter is the thinnest among the nonwoven fabrics constituting the mask.
In the present invention, in particular, as a mask for removing pollen, the average fiber diameter of the melt blown (MB) nonwoven fabric is 3 to 15 μm, preferably 4 to 8 μm, and the total weight of the melt blown (MB) nonwoven fabric components is 10 g. / M ² or less, preferably ² to 5 g / m ² , the pollen particles can be captured in a necessary and sufficient (99% or more).

Moreover, the composite nonwoven fabric of the inner layer (B) has a total weight of 10 to 25 g / m ² and an air permeability of 60 cc / cm ² / sec in consideration of the ease of breathing and deformation during expiration during use. The above is preferable.

Moreover, in order to improve the function which collects pollen and microparticles | fine-particles, it is preferable to use what was electret-ized as the composite nonwoven fabric made from a polypropylene of an inner layer (B). The electretized non-woven fabric is used because fine pollen and dust can be efficiently collected by electrostatic force. This electretization allows the non-woven fabric to run on a grounded electrode, and from above the needle electrode Alternatively, it is achieved by applying corona discharge by applying a high voltage to the wire electrode.
Furthermore, the electretization treatment can be applied not only to the composite nonwoven fabric of the inner layer (B) but also to a laminated nonwoven fabric in which at least three layers of the outer layer (A) -inner layer (B) -outer layer (A) are laminated and integrated, preferable. That is, the function of collecting pollen and fine particles can be improved by using a laminated nonwoven fabric that has been electretized.

3. Non-woven fabric substrate for sanitary mask and method for producing the same Non-woven fabric substrate for sanitary mask of the present invention is formed by laminating and integrating at least three layers of nonwoven fabric of outer layer / inner layer / outer layer in order to impart “waist” to the mask substrate. It is characterized by being.
In particular, the nonwoven fabric base material for sanitary mask of the present invention has an inner layer (B) continuously inserted between the outermost layer (A) of the outermost layer and the mouth layer, and heat embossing, ultrasonic waves, hot melt adhesive resin, etc. It is characterized by integrating at least three layers of outer layer (A) -inner layer (B) -outer layer (A).

When integrating with a hot embossing roll, the outer layer (A) may be a non-woven fabric already in sheet form, or the inner layer (B) is sanded with carded fibers and later It may be integrated with a hot embossing roll.
Moreover, when integrating with an ultrasonic wave or a hot melt resin, the outer layer (A) may be integrated by sanding the inner layer (B) using a non-woven fabric that is already in sheet form. .

4). Sanitary mask The sanitary mask of the present invention is characterized by using the above-mentioned non-woven fabric substrate for sanitary mask as a face covering part. Further, the shape thereof is a three-dimensional shape (FIG. 1) or a flat shape, and has a portion pleated on the face covering portion (FIGS. 2 and 3).

  EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to only the examples. The test methods used in Examples and Comparative Examples are as follows.

(1) Weight per unit area of non-woven fabric: A test piece of 100 × 100 mm was taken from the sample length direction, the weight in a moisture equilibrium state was measured, and the weight was calculated per 1 m ² .
(2) Air permeability of nonwoven fabric: Using a Frazier type air permeability tester, the inclination type barometer was fixed at 1.27 cm and the air permeability was measured in accordance with JIS L1096-1979 "General Textile Test Method".
(3) Pressure loss: Measured using a TSI-8130 mask tester under conditions where the passing wind speed was 15.0 cm / sec.
(4) Pollen removal rate: Measured using the cedar pollen having a particle diameter of 20 to 40 μm by the testing method of Boken method JSIF A 030-2004 at the Spinning Inspection Association.
(5) Waist of non-woven fabric: The bending resistance was measured according to JIS L 1096 E method (handle ohmmeter method).

[Example 1]
As the outer layer (A), a nonwoven fabric was prepared by a thermal bond method using polypropylene (PP) / polyethylene (PE) core-sheath composite short fibers having a basis weight of 20 g / m ^{2, and} the inner layer (B) shown below was prepared. It was sandwiched from both sides.
The core-sheath composite short fiber used was ESC023 manufactured by ES Fiber Vision Co., Ltd. using a hydrophilic oil agent, and the fineness was 2 dtex and the cut length was 51 mm.
Further, the inner layer (B) used was a polypropylene spunbond / meltblown / spunbond (SMS) composite nonwoven fabric having a basis weight of 15 g / m ² and subjected to electret processing (DC voltage 25 KV) by corona discharge treatment. Each component of the SMS composite nonwoven fabric is composed of a spunbond (S) layer [6.25 g / m ² ] / melt blow (M) layer [2.5 g / m ² ] / spunbond (S) layer [6.25 g / m. ² ] and is produced as an SMS nonwoven fabric having a total weight of 15 g / m ² . The air permeability of this SMS nonwoven fabric was 200 cc / cm ² / sec.
The outer layer (A) was sandwiched from both sides of the inner layer (B), and three layers of outer layer (A) -inner layer (B) -outer layer (A) were laminated and integrated by hot embossing.
The overall air permeability of the outer layer (A) -inner layer (B) -outer layer (A) laminated nonwoven fabric as the mask base material was 55 cc / cm ² / sec. The pollen removal rate was 99.7%.

[Example 2]
As the outer layer (A), a nonwoven fabric was prepared by a thermal bond method using polypropylene (PP) / polyethylene (PE) core-sheath composite short fibers having a basis weight of 20 g / m ^{2, and} the inner layer (B) shown below was prepared. Electret processing (DC voltage 25 KV) by corona discharge treatment was applied to the product that was sandwiched from both sides and laminated and integrated.
The core-sheath composite short fiber used was ESC023 manufactured by ES Fiber Vision Co., Ltd. using a hydrophilic oil agent, and the fineness was 2 dtex and the cut length was 51 mm.
Furthermore, the inner layer (B) was a polypropylene spunbond / meltblown (SM) composite nonwoven fabric having a basis weight of 24 g / m ² . Each component of this SM composite nonwoven fabric is composed of a spunbond (S) layer [15 g / m ² ] / melt blown (M) layer [9 g / m ² ], and is produced as an SM nonwoven fabric with a total weight of 24 g / m ^2. It is what has been. The air permeability of this SM nonwoven fabric was 75 cc / cm ² / sec.
As described above, the outer layer (A) was sandwiched from both sides of the inner layer (B), and three layers of outer layer (A) -inner layer (B) -outer layer (A) were laminated and integrated by hot embossing.
The overall air permeability of the outer layer (A) -inner layer (B) -outer layer (A) laminated nonwoven fabric as the mask substrate was 50 cc / cm ² / sec. Moreover, the pollen removal rate was 99% or more.

[Example 3]
As the outer layer (A), polypropylene (PP) / polyethylene (PE) core-sheath composite short fiber having a weight per unit area of 25 g / m ² was used to produce a nonwoven fabric by a thermal bond method, and the inner layer (B) shown below was prepared. It was sandwiched from both sides.
The core-sheath composite short fiber used was ESC023 manufactured by ES Fiber Vision Co., Ltd. using a hydrophilic oil agent, and the fineness was 2 dtex and the cut length was 51 mm.
Further, the inner layer (B) used was a polypropylene spunbond / meltblown / spunbond (SMS) composite nonwoven fabric having a basis weight of 15 g / m ² and subjected to electret processing (DC voltage 25 KV) by corona discharge treatment. Each component of the SMS composite nonwoven fabric is composed of a spunbond (S) layer [6.25 g / m ² ] / melt blow (M) layer [2.5 g / m ² ] / spunbond (S) layer [6.25 g / m. ² ] and is produced as an SMS nonwoven fabric having a total weight of 15 g / m ² . The air permeability of this SMS nonwoven fabric was 200 cc / cm ² / sec.
The outer layer (A) was sandwiched from both sides of the inner layer (B), and three layers of outer layer (A) -inner layer (B) -outer layer (A) were laminated and integrated by hot embossing.
The overall air permeability of the outer layer (A) -inner layer (B) -outer layer (A) laminated nonwoven fabric as the mask base material was 55 cc / cm ² / sec. The pollen removal rate was 99.7%.

[Examples 4 and 5]
A three-dimensional shape (FIG. 1) and a pleated mask (FIG. 2) were prepared using the mask base material.

[Comparative Examples 1-3]
As Comparative Examples 1 to 3, for the commercially available masks, the mask material composition, air permeability, pollen collection efficiency, and pressure loss were evaluated, and compared with Examples of masks using the nonwoven fabric substrate of the present invention. did. The results are shown in Tables 1 and 2.

[Comparative Example 4]
As the outer layer (A), polypropylene (PP) / polyethylene (PE) core-sheath composite short fiber having a weight per unit area of 25 g / m ² was used to produce a nonwoven fabric by a thermal bond method, and the inner layer (B) shown below was prepared. It was sandwiched from both sides.
Further, ESC023 manufactured by ES Fiber Vision Co., Ltd. was used as the short fiber using the hydrophilic oil, and the fineness of the short fiber was 2 dtex and the cut length was 51 mm.
Further, the inner layer (B) was obtained by subjecting a polypropylene spunbond / meltblown / spunbond (SMS) composite nonwoven fabric having a basis weight of 15 g / m ² to an electret treatment. Each component of the SMS composite nonwoven fabric is composed of a spunbond (S) layer [6.25 g / m ² ] / melt blow (M) layer [2.5 g / m ² ] / spunbond (S) layer [6.25 g / m. ² ] and is produced as an SMS nonwoven fabric having a total weight of 15 g / m ² . The air permeability of this SMS nonwoven fabric was 200 cc / cm ² / sec.
The inner layer (B) was sandwiched by the outer layer (A) from both sides to form a simple laminated nonwoven fabric, each of which was a separate body.
Table 3 shows the results of evaluation of the bending resistance of this mask base material, compared with Example 3.

As is clear from Tables 1 and 2, the masks of Examples 1 and 2 have higher air permeability and lower pressure loss than Comparative Examples 1 to 3. Moreover, the removal rate of pollen (diameter: about 20 μm) is 99% or more, and a comfortable mask that is effective for removing pollen and is not stuffy can be provided.
Further, as is apparent from Table 3, Example 3 in which the three layers of nonwoven fabric are combined and integrated is less likely to lose its shape when the mask is worn than Comparative Example 4 in which each is composed of a separate body. It is shown that the bending resistance is high, and it is shown that the performance is excellent also in the wearing test.

  Since the nonwoven fabric substrate for sanitary mask of the present invention has a “waist”, it has excellent wearing feeling, low pressure loss and high collection efficiency. Therefore, it can be suitably used as a sanitary mask substrate. Have As a result, the sanitary mask using it has excellent wear feeling, low pressure loss and high collection efficiency, so it is not only used for consumer pollen countermeasures but also in industrial work environments. At the same time, it is possible to provide a mask with significantly improved protection from splashes containing bacteria and viruses such as tuberculosis. Therefore, it can be used not only for consumer use and industrial use, but also in a wide range of applications such as prevention of infection in hospitals, use in dental treatment, and prevention of epidemics.

It is a perspective view of the three-dimensional mask in the Example of this invention. It is a front view of the pleat mask in the Example of this invention. It is a figure of the pleat part of the pleat mask in the Example of this invention.

Explanation of symbols

  1 pleat

Claims (7)

A sanitary mask nonwoven fabric substrate comprising a laminated nonwoven fabric of at least three layers of outer layer (A) -inner layer (B) -outer layer (A),
The outer layer (A) is composed of a nonwoven fabric composed of polyolefin short fibers or polyester short fibers, and the inner layer (B) is composed of a composite nonwoven fabric in which a polypropylene spunbond nonwoven fabric and a melt blown nonwoven fabric are combined and laminated and integrated. A nonwoven fabric substrate for sanitary masks, characterized in that   2. The sanitary mask nonwoven fabric substrate according to claim 1, wherein the inner layer (B) is electret-treated.   The nonwoven fabric substrate for sanitary mask according to claim 1, wherein the laminated nonwoven fabric is electret-treated. The inner layer (B) has a total basis weight of 25 g / m ² or less and an air permeability of 60 cc / cm ² / sec or more, and the total weight of the melt blown nonwoven fabric components is in the range of ² to 10 g / m ² . And the average fiber diameter of a melt blown nonwoven fabric component is the range of 3-15 micrometers, The nonwoven fabric base material for sanitary masks of any one of Claims 1-3 characterized by the above-mentioned. The outer layer (A) forms the outermost layer and the mouth layer of the sanitary mask, the weights of the outermost layer and the mouth layer are 10 to 50 g / m ² , respectively, and the fineness is added to the constituent fibers of the outermost layer and the mouth layer. The non-woven fabric substrate for a sanitary mask according to any one of claims 1 to 4, wherein at least one fiber selected from the range of 1 to 10 dtex is used.   The inner layer (B) is inserted between the outermost layer (A) of the outermost layer and the mouth layer, and laminated and integrated using hot embossing, ultrasonic waves, or a hot melt adhesive. The nonwoven fabric base material for sanitary masks any one of 1-5.   A sanitary mask characterized by using the nonwoven fabric base material for sanitary mask according to any one of claims 1 to 6 for a face covering part.

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