JP2022096736A - Stick type three-dimensional mask - Google Patents

Abstract

To provide a stick type three-dimensional mask which can be directly stuck on the face and is excellent in wear feeling on and adhesion to the face.SOLUTION: A stick type three-dimensional mask includes a mask body part 1 for covering the nose and the mouth, and an adhesive part 2 for sticking the mask body part 1 directly onto the face. In the mask body part 1, two symmetrical sheets of polyurethane elastic nonwoven fabric are deposited by a deposition part 3 extending along a virtual center line P that extends vertically in the center of the face in the state that it is stuck to the face, thereby having a three-dimensional shape. The adhesive part 2 is formed into a belt-like shape along edges on both left and right sides of the mask body part 1, and the sheeps of polyurethane elastic nonwoven fabric composing the mask body part are provided with specific physical property.SELECTED DRAWING: Figure 1

Description

The present invention relates to a stick-on three-dimensional mask that can be directly attached to the face and is excellent in wearing feeling and adhesion.

Generally, a mask covering the nose and mouth is widely used to prevent infectious diseases and hay fever. The mainstream of such masks is a mask that has a substantially square shape that covers the nose and mouth, and ear hooks that extend laterally from the left and right edges of the mask, but it has been worn for a long time. Because the part of the ear hook that touches the ear hurts, and because the ear hook part interferes with haircuts, shampoo, etc. at beauty salons, barber shops, esthetic salons, etc. A type of disposable mask that can be used by directly attaching it to the face without it has been proposed (Patent Documents 1, 2, etc. below).

Japanese Patent No. 6446281 Utility Model Registration No. 3227455

For example, Patent Document 1 discloses a three-dimensional mask including a mask main body 11 made of a woven fabric or a non-woven fabric, and holding portions 12 attached to the left and right edges thereof, as shown in FIG. There is. In this product, an adhesive layer 13 is formed on one side of each holding portion 12 (the side facing the face) as shown by diagonal lines, and when not in use, the surface thereof is covered with release paper (not shown). At the time of use, the mask main body 11 can be attached to the face by peeling it off and attaching it to the face.

Each of the holding portions 12 is provided with a notch 14 as shown in the drawing, and when the holding portion 12 is attached to the face, the notch 14 is closed as shown in FIG. When attached in this way, the mask is given a three-dimensional shape along the face.

However, the three-dimensional mask has a problem that the holding portions 12, which are separate members, must be attached to the left and right sides of the mask main body portion 11, which requires labor and cost. Further, there is also a problem that the joint portion between the mask main body portion 11 and the holding portion 12 hits the cheek and gives a feeling of strangeness as the mouth opens and closes. Further, since the woven fabric or the non-woven fabric constituting the mask main body 11 is not elastic, there is a problem that the entire mask main body 11 moves with the opening and closing of the mouth and the holding portion 12 is easily peeled off from the face.

On the other hand, as shown in FIG. 6, Patent Document 2 discloses a three-dimensional mask made of one mask cloth, provided with a notch 20 at the upper portion thereof, and joined to each other to give a three-dimensional shape. .. A band-shaped adhesive member 21 is directly attached to both the left and right sides of the three-dimensional mask, and the three-dimensional mask can be attached to the face by using the adhesive member 21. ..

However, in this case, the three-dimensional shape is given only to the part that touches the nose by joining the notch 20, and the other parts are in the shape of a flat sheet, so that the fabric sticks to the mouth and a feeling of crampedness is unavoidable. .. Further, since the cloth is pulled as the mouth is opened and closed, there is also a problem that the adhesive member 21 is easily peeled off from the face.

In Patent Document 2, it is proposed to use a polyethylene foam sheet having open cells as the mask cloth, but the foam sheet having open cells has a large number of bubble openings distributed and formed on the surface of the cloth. Therefore, there is a problem that the texture of the fabric rubs against the face as the fabric moves, and the wearing feeling is not good.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a sticking-type three-dimensional mask that can be directly attached to the face and has excellent wearing feeling and adhesion to the face.

In order to achieve the above object, the present invention is a mask provided with a mask main body for covering the nose and mouth and an adhesive portion for directly attaching the mask main body to the face. Two pieces of polyurethane elastic non-woven fabric having a symmetrical shape are welded to the portion by a welding portion extending along a virtual center line P extending vertically in the center of the face while being attached to the face, thereby giving a three-dimensional shape. The adhesive portion is formed in a band shape along the left and right side edges of the mask main body portion, and the polyurethane elastic non-woven fabric constituting the mask main body portion has the following characteristics (1) to (4). The first gist is a stick-on three-dimensional mask provided with).
(1) Metsuke: 60-120 g / m ²
(2) Vertical (MD direction) and horizontal (CD direction) tensile strength: 1000 cN / 20 mm or more for both (3) Vertical and horizontal tensile elongation: 300% or more for both (4) Vertical and horizontal 100% elongation recovery rate in the direction: 90% or more for both

The second gist of the present invention is, in particular, a stick-on three-dimensional mask in which the polyurethane elastic nonwoven fabric further has the following characteristics (5) and (6).
(5) Air permeability: 50cc / cm ² / sec or more (6) Maximum heat absorption rate (Q-max): 0.08 or more

Further, among them, the third gist of the present invention is a sticking type three-dimensional mask in which the dimension d in the width direction across the longitudinal direction of the welded portion is 0.1 to 1.5 mm. The fourth gist is a sticking type three-dimensional mask in which the welded portion has an arc shape with a radius of curvature of 75 to 125 mm.

The fifth gist of the present invention is a stick-on three-dimensional mask in which the adhesive portion is formed in a strip shape having a width of 10 to 25 mm, and the adhesive portion is at least on the side with respect to the face. The sixth gist is a stick-on three-dimensional mask whose surface is composed of a layer made of an acrylic adhesive. Among them, in particular, the adhesive portion is an adhesive portion having a multi-layer structure, the surface on the side with respect to the face is composed of a layer made of an acrylic adhesive, and the surface on the side with respect to the polyurethane elastic non-woven fabric is synthetic rubber. The seventh gist is a stick-on three-dimensional mask composed of a layer made of an adhesive.

That is, in the stickable three-dimensional mask of the present invention (hereinafter, also simply referred to as "mask"), the mask main body for covering the nose and mouth is in a state where two sheets of polyurethane elastic non-woven fabric having a symmetrical shape are attached to the face. Since it is three-dimensionally tailored by welding along the virtual center line P in the above, it has a shape that follows the unevenness of the face from the nose to the mouth, especially around the mouth without becoming cramped. ..

Moreover, since the polyurethane elastic non-woven fabric is a special one having specific physical characteristics, it has excellent followability to the face and has a very excellent wearing feeling. Since the movement of the center side of the mask body that expands and contracts according to the movement of the mouth does not easily reach the peripheral edge of the mask body, the adhesive formed in a band shape along the left and right edges of the mask body. It has the advantage that the portion does not easily move with respect to the face and does not easily come off from the face. Therefore, even if the width of the band-shaped adhesive portion is increased as compared with the conventional case, it is difficult to peel off from the face, and the mask main body portion can be held more firmly.

Among the present inventions, in particular, the polyurethane elastic non-woven fabric having the characteristics of (5) air permeability and (6) maximum heat absorption rate (Q-max) set within a predetermined range is not applicable. It is suitable because it is easier to breathe, less stuffy, and the wearing feeling is further improved.

Further, among the present inventions, in particular, in the case where the dimension d in the width direction across the longitudinal direction of the welded portion is 0.1 to 1.5 mm, the dimension d in the width direction of the welded portion is very small. Due to its small size, the welded portion is inconspicuous in the central portion of the front surface of the mask, and the appearance is good. Further, the presence of the welded portion does not impair the wearing feeling, which is suitable.

Further, among the present inventions, in particular, the welded portion having an arcuate shape with a radius of curvature of 75 to 125 mm has a shape in which an appropriate degree of freedom is secured from the nose to the mouth, and an excellent wearing feeling is obtained. It is suitable because it can be obtained.

Further, among the present inventions, in particular, the adhesive portion having the adhesive portion formed in a strip shape having a width of 10 to 25 mm has good followability to the face of the mask main body portion, and therefore, within the above range. If there is, the adhesive portion is not easily peeled off from the face regardless of the width, and the entire mask can be firmly held, which is suitable. In particular, the width can be made larger (for example, 20 to 25 mm) as compared with the adhesive portion of a general sticking type mask, and the entire mask can be held more firmly.

Further, among the present inventions, in particular, the adhesive portion having the adhesive portion whose surface at least on the side of the adhesive portion with respect to the face is composed of a layer made of an acrylic adhesive is the facial surface of the acrylic adhesive. Since it is less irritating to the skin, it has an excellent wearing feeling and can be used better. Among them, in particular, the adhesive portion is an adhesive portion having a multi-layer structure, the surface on the side with respect to the face is composed of a layer made of an acrylic adhesive, and the surface on the side with respect to the polyurethane elastic nonwoven fabric is synthetic rubber. The one composed of a layer made of an adhesive is less irritating to the face and the adhesive part is bonded to the mask body with sufficient adhesive force, so that it is not only excellent in wearing feeling but also easy to handle. Is also excellent.

(A) is a plan view showing a state in which the mask of one embodiment of the present invention is folded flat, and (b) is an explanatory view showing a state in which the mask is opened to the left and right to form a three-dimensional shape. It is a top view which shows the right side cloth of two sheets which cut the polyurethane elastic non-woven fabric used for the said mask as symmetrical mask cloth (right side cloth and left side cloth). It is a schematic enlarged sectional view which shows the detail of the adhesive part of the said mask. It is a top view which shows an example of the conventional sticking type three-dimensional mask. It is explanatory drawing which shows the state which the said stick-on type three-dimensional mask is stuck on the face. It is a top view which shows the other example of the conventional sticking type three-dimensional mask.

Next, a mode for carrying out the present invention will be described in detail with reference to the drawings.

FIG. 1 (a) is a plan view showing a state in which a mask according to an embodiment of the present invention is folded flat, and FIG. 1 (b) is an explanation showing a state in which the mask is opened to the left and right and viewed from the front. It is a figure.

More specifically, the mask has a mask body 1 for covering the nose and mouth and an adhesive portion 2 extending in a band shape along the left and right edges of the mask body 1 for directly attaching the mask body 1 to the face. And have. The mask main body 1 is formed by two sheets of polyurethane elastic non-woven fabric having a symmetrical shape (with the right side fabric), which are welded along a virtual center line P extending vertically in the center of the face with the mask body 1 attached to the face. It is composed of the left fabric). It should be noted that what appears in FIG. 1A is the fabric on the right side of the mask main body 1.

In the mask main body 1, the welded portion 3 formed by welding two symmetrically shaped fabrics is from the upper and lower ends to the center (“upper and lower” is the face) as can be seen from the planar shape of FIG. 1 (a). It has an arc shape that gently bulges toward (the same applies hereinafter) according to the vertical direction when it is attached to.

The upper edge portion 4 of the mask body portion 1 is a straight line that is inclined upward from the left and right ends thereof toward the center line P, and the lower edge portion 5 of the mask body portion 1 is centered from the left and right ends thereof. It is a straight line that slopes down toward the line P.

Since the mask main body 1 is given a special shape in this way, when it is opened to the left and right, as shown in FIG. 1 (b), the central, vertically extending welded portion 3 is brought to the front. It has a bulging, three-dimensional shape.

The mask main body 1 can be obtained, for example, as follows. That is, first, a polyurethane elastic non-woven fabric having specific physical properties and breathability, which will be described later, and having a predetermined filter function (for example, functions such as pollen prevention and splash prevention) according to the purpose is prepared, and is shown in FIG. Two layers of symmetrical right and left fabrics with the same shape (or separately from one sheet) are cut or melted. Then, in a state where the obtained right side fabric and the left side fabric are overlapped with each other, the planned welding portion 3'which becomes the welding portion 3 shown in FIG. 1 is welded to obtain the shapes shown in FIGS. 1 (a) and 1 (b). The mask body 1 can be obtained.

The polyurethane elastic non-woven fabric used for the mask main body 1 is a non-woven fabric using polyurethane elastic fibers. Polyurethane elastic fibers are more flexible than other fibers such as polypropylene, and have a high thermal conductivity, so that they have an advantage that heat is less likely to be trapped in the mask.

The polyurethane elastic nonwoven fabric does not have to be entirely composed of polyurethane elastic fibers, and may be partially replaced with other fibers. However, since it is necessary to secure elasticity, flexibility, etc. as a mask, when using other fibers, it is desirable to set the ratio to 10% by mass or less with respect to the entire fibers.

The thickness of the polyurethane elastic fiber used in the polyurethane elastic nonwoven fabric is not particularly limited, but the fiber diameter is as small as possible so that many fine voids can be formed in consideration of the removal performance against pollen and droplets. It is desirable, and considering the overall strength, elasticity, breathability, etc., the average fiber diameter thereof is preferably 25 μm or less, particularly preferably 5 to 15 μm, and even more preferably 8 to 13 μm.

Further, the polyurethane elastic nonwoven fabric is particularly required to have the following characteristics (1) to (4) in order to obtain a good wearing feeling and sufficient adhesion.
(1) Metsuke: 60 to 120 g / m ² , especially 80 to 120 g / m ² , and further 90 to 110 g / m ² .
(2) Vertical (MD direction, same hereafter) and horizontal (CD direction, same hereafter) tensile strength: 1000 cN / 20 mm or more in both vertical direction, especially 1600 cN / 20 mm or more in the vertical direction, and 1800 cN / 20 mm. Above all, the lateral tensile strength is 1200 cN / 20 mm or more, and further 1600 cN / 20 mm or more (3) Vertical and lateral tensile elongation: both 300% or more, especially 350 to 520%.
(4) Vertical and horizontal 100% elongation recovery rate: 90% or more in both directions, especially 92 to 100%

The above-mentioned "tensile strength" and "tensile elongation" are values measured according to JIS L1913: 2010 6.3.1, and the above-mentioned "100% elongation recovery rate" is JIS L1096: 2010 8 It is a value measured according to 16.6.2.

Further, it is preferable that the polyurethane elastic non-woven fabric further has the following characteristics (5) and (6) in order to obtain a more excellent wearing feeling. The upper limit of the air permeability is appropriately set according to the required filter performance and the like. Further, the maximum heat absorption rate (Q-max) is an index of the degree of feeling cold when touched, and the larger the value, the stronger the feeling of coldness is obtained, which is preferable.
(5) Air permeability: 50 cc / cm ² / sec or more, especially 75 cc / cm ² / sec or more (6) Maximum heat absorption rate (Q-max): 0.08 or more, especially 0.10 or more

The above-mentioned "air permeability" is a value measured according to JIS L1913: 2010 6.8.1 Frazier method, and the above-mentioned "maximum heat absorption rate (Q-max)" is based on JIS L1927: 2020. It is a value measured by.

As the polyurethane elastic non-woven fabric having such characteristics, the one obtained by the melt blow method is particularly suitable. To explain this method in more detail, for example, using the spinning apparatus described in Japanese Patent Publication No. 41-7883, a thermoplastic polyurethane elastic body is melt-discharged from the spinning mouthpiece, and an accelerated gas flow is injected from both sides of the nozzle. To make the filament thinner. Then, the finely divided filaments are separated from the gas flow and laminated on a collecting device such as a moving conveyor net, and the filaments are cooled and solidified while being bonded to each other at the contact points. Of course, after cooling and solidifying on the above-mentioned collecting device, the bonding may be performed by heating and pressurizing using a roller or the like. The polyurethane elastic non-woven fabric thus obtained has a structure in which fine continuous filaments of polyurethane elastic fibers are randomly laminated, so that it has excellent breathability, a precise filter function, high elasticity, and flexibility. ..

Further, as the polyurethane elastic nonwoven fabric, those imparted with antibacterial, bactericidal or antiviral properties can be used. Those imparted with antibacterial or antiviral properties are hygienic because the growth of various germs or the growth of viruses is suppressed. Then, those imparted with bactericidal properties can be used for special purposes because they can prevent the invasion of bacteria from the outside.

Further, as the polyurethane elastic non-woven fabric, one to which conductivity is imparted can be used. By imparting conductivity, static electricity does not accumulate on the mask, which keeps dust and dirt away and makes it more hygienic.

Next, the adhesive portion 2 for directly attaching the mask main body portion 1 to the face will be described. The adhesive portion 2 is formed in an arrangement extending in a vertical band along the left and right side edges of the mask main body portion 1. If the left and right edges of the adhesive portion 2 overlap the left and right edges of the mask main body 1, it becomes difficult to peel them off from the face. Therefore, the left and right edges of the adhesive portion 2 are the mask main body 1. It is considered to be located slightly inside the left and right edges of the.

As described above, when the left and right edges of the adhesive portion 2 are arranged to be inside the left and right edges of the mask main body 1, the penetration width (the left and right edges and the adhesive portion of the mask main body 1) is set. The width between the left and right edges of 2) is preferably set to 1 to 10 mm, more preferably 2 to 5 mm. That is, if the penetration width is too large, the part of the left and right edges of the mask body 1 that is not attached to the face (the so-called "asobi" part) becomes wide and easily flips over, resulting in poor appearance. There is a risk of becoming. Further, if the penetration width is too small, it becomes difficult to peel off the mask main body 1 from the face, which is not preferable.

As schematically shown in FIG. 3, the adhesive portion 2 has a three-layer structure in which an acrylic adhesive layer 7 and a synthetic rubber adhesive layer 8 are laminated on one side of a sheet-shaped support 6. The synthetic rubber adhesive layer 8 is attached to the inner surface of the mask main body 1, and the acrylic adhesive layer 7 is the surface to be attached to the face. The surface of the acrylic pressure-sensitive adhesive layer 7 is protected by a release paper (not shown) in an unused state, and is peeled off during use to attach the adhesive portion 2 to the face.

As the adhesive portion 2, a commercially available double-sided adhesive tape may be used, or the adhesive portion 2 may be directly applied and formed on the inner side surface of the mask main body portion 1. When the adhesive portion 2 is directly applied and formed, the surface of the adhesive portion 2 formed by coating is usually protected with a release paper and peeled off at the time of use. Considering work efficiency, it is preferable to use double-sided adhesive tape.

The mask configured in this way can be directly attached to the face by the left and right adhesive portions 2, and since there is no portion to be put on the ears, the ears do not hurt. Further, even when receiving a treatment such as shampoo or haircut at a beauty salon or the like, there is an advantage that the portion to be put on the ear does not get in the way.

Since the above mask is made by welding two symmetrical fabrics by a welding portion 3 having a special contour shape that bulges toward the front, the mask is three-dimensionally tailored from the nose to the mouth, especially. It has a shape that follows the unevenness of the face without becoming cramped around the mouth, and is excellent in wearing comfort.

Moreover, since the polyurethane elastic non-woven fabric used as the material of the mask body is a special one with specific physical characteristics, it has excellent followability to the face, so it is not only excellent in wearing feeling but also in the movement of the mouth. The movement of the center side of the mask main body 1 that expands and contracts in accordance with the movement is less likely to be heard on the peripheral edge of the mask main body 1. Therefore, the adhesive portions 2 on the left and right sides of the mask main body 1 have the advantage that they are difficult to move with respect to the face and are not easily peeled off from the face. Therefore, even if the width of the band-shaped adhesive portion 2 is increased as compared with the conventional case, it is difficult to peel off from the face, and the mask main body portion 1 can be held more firmly.

The pressure-sensitive adhesive portion 2 has a three-layer structure in which an acrylic pressure-sensitive adhesive layer 7 and a synthetic rubber-based pressure-sensitive adhesive layer 8 are laminated with a support 6 interposed therebetween. Since it is attached to the inner surface of the mask body 1 and the acrylic adhesive layer 7 is attached to the face, there is little irritation to the face and sufficient adhesive force is applied to the mask body 1. The adhesive portion 2 is attached and has an advantage that it can be used with peace of mind.

Since the mask of the present invention has no portion to be put on the ears and is used by being directly attached to the face, the entire mask is not pulled to the left or right. Therefore, unlike the conventional ear-hook type mask, the wearing feeling is not impaired even if the welded portion 3 extending vertically from the nose to the mouth is not made to function as a rib by giving rigidity. That is, it is not necessary to widely set the dimension d [see FIG. 2] in the width direction of the welded portion 3 across the longitudinal direction. Therefore, it is preferable to set the width dimension d to, for example, 2 mm or less, particularly 0.1 to 1.5 mm. By making the width dimension of the welded portion 3 extremely narrow in this way, the welded portion 3 is not conspicuous in the center of the mask, and the appearance is good. Further, since the welded portion 3 is not stiff, a better wearing feeling can be obtained.

The welded portion 3 needs to have a shape protruding toward the front along the center line P shown in FIG. 1 so that the central portion of the mask main body 1 has a three-dimensional shape that bulges toward the front. Is. Preferably, it has a gentle arc shape as in the above example, and the radius of curvature R of the arc shape (radius of curvature of the edge of the welded portion 3, see FIG. 1) is usually 75 to 125 mm. Above all, it is preferable to set it to 90 to 110 mm. That is, by forming the welded portion 3 into an arc shape having an appropriate radius of curvature, it is possible to control the three-dimensional bulging shape from the nose to the mouth and obtain an excellent wearing feeling and adhesion.

If the welded portion 3 does not significantly impair the wearing feeling and appearance, the welded portion 3 may be formed into a bulging shape in which a part thereof is straightened to form an angular bulge, or a bulging shape in which a plurality of arc shapes having different radii of curvature are combined. Can be done. However, when the straight part is combined, if the straight part becomes long, the feeling of tightness from the nose to the mouth increases, so the length of the straight part is limited to 1/3 or less of the total length of the welded portion 3. Is preferable.

Further, in the mask main body 1, when cutting or fusing the left and right fabrics, as shown in FIG. 2, the lateral direction of the polyurethane elastic non-woven fabric used as a material (CD direction, indicated by an arrow X in FIG. 2) is the mask. When aligned in the left-right direction of the main body 1, that is, in the direction perpendicular to the left and right edges of the mask main body 1, the vertical direction (MD direction), which is generally stronger than the horizontal direction, is the top and bottom of the mask. Since it is oriented in the direction, the three-dimensional portion that bulges up and down is not easily crushed, and the degree of freedom of the mouth is more secured, which is preferable.

The angle θ (see FIG. 2) formed by the upper edge portion 4 and the lower edge portion 5 of the mask main body 1 is preferably 20 to 60 °, and more preferably 25 to 55 °. More preferred. That is, when the angle θ is within the above range, the upper edge portion 4 and the lower edge portion 5 of the mask main body portion 1 are appropriately inclined with respect to the vertical and horizontal directions of the fabric, which is more excellent for the face. This is because it exhibits followability.

Further, in the above example, as the adhesive portion 2 provided on the mask main body portion 1, a three-layer structure in which an acrylic adhesive layer 7 and a synthetic rubber adhesive layer 8 are laminated with a support 6 interposed therebetween was used. However, the adhesive portion 2 does not necessarily have to have this structure, and may be a single adhesive layer, two layers, or a multilayer of four or more layers. However, it is preferable that at least the pressure-sensitive adhesive layer on the side to be attached to the face is hypoallergenic to the face, and examples of the pressure-sensitive adhesive that serves as such a pressure-sensitive adhesive layer include acrylic pressure-sensitive adhesives and the like. A silicone-based adhesive is preferably used. In particular, an acrylic pressure-sensitive adhesive is preferable in terms of cost. Further, it is preferable that the adhesive exerts sufficient adhesive force (including adhesive force) on the surface to be attached to the mask main body 1, and as the adhesive layer on the side to be attached to the mask main body 1, for example, the above. As in the example of the above, it is preferable to use a layer made of a synthetic rubber-based pressure-sensitive adhesive in combination with the above-mentioned acrylic-based pressure-sensitive adhesive or the like.

As double-sided adhesive tape having such adhesive performance, for example, acrylic adhesive / synthetic rubber adhesive laminated type (double-sided 2110R, manufactured by Nichiban Medical Co., Ltd.), acrylic adhesive / synthetic rubber adhesive laminated type ( Commercial products such as 1577 (manufactured by 3M Co., Ltd.) can be mentioned. Further, as already described, an adhesive layer having a structure similar to the layer structure of these double-sided adhesive tapes can be directly formed on the inner side surface of the mask main body portion 1 to form the adhesive portion 2. In any of the configurations, the adhesive surface of the adhesive portion 2 on the side to be attached to the face is provided in a state of being protected by a release paper.

In the present invention, the width W of the adhesive portion 2 [see FIG. 1 (a)] is not particularly limited, but the fabric has a followability and the periphery of the mask main body portion 1 is forcibly pulled. Therefore, even if the width W is increased, it is less likely to be peeled off than the adhesive portion in the conventional sticking type three-dimensional mask. Therefore, the width W is usually about 5 to 15 mm, but in the present invention, it is preferably set to 10 to 25 mm, particularly 18 to 22 mm.

Further, as described above, it is preferable that the edge of the adhesive portion 2 is inserted several millimeters inward from the edge of the mask main body 1 in consideration of ease of peeling from the face. Normally, assuming that the length of the left and right edge of the mask main body 1 is L ₁ and the length of the edge of the adhesive portion 2 is L ₂ [see FIG. 1 (a)], L ₂ / L ₁ is It is set to about 0.7 to 0.95, preferably about 0.75 to 0.9. The upper and lower edge edges of the adhesive portion 2 may be inclined according to the inclination of the upper end portion 4 and the lower end portion 5 of the mask main body portion 1, or may be horizontal as shown in the drawing.

In the above example, the adhesive portion 2 is arranged so as to extend vertically one by one on the left and right, but it does not have to be a strict "belt" and has a gently curved wavy shape. It does not matter if it is bent in the shape of a "<". Further, the adhesive layer constituting the adhesive portion 2 may be formed intermittently in the adhesive layer forming region, such as a dot shape or a striped shape, and may have a gap in the middle. However, it is desirable that such an adhesive layer is a continuous strip-shaped adhesive portion 2 covered with a strip-shaped continuous release paper. That is, in the adhesive portion 2 divided in the vertical direction by a plurality of release papers, it takes time and effort to sequentially peel off the first release paper and the second release paper, and thus the release paper is exposed first in the meantime. This is because the adhesive portion may stick to the mask main body 1 side instead of the face and cannot be stuck to the face, which is not preferable.

Next, the present invention will be described with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.

First, six types of polyurethane elastic nonwoven fabrics A to E having different physical characteristics were prepared as mask fabrics used for the mask main body. The physical characteristics of each non-woven fabric are as shown in Table 1 below.
The polyurethane elastic nonwoven fabrics A to E are made from a thermoplastic polyurethane elastic material composed of diphenylmethane diisocyanate, a polyol, and 1,4-butanediol by a melt blow method.

In Table 1 above, "pollen prevention performance (removal rate)" is defined as "pollen particle collection (filtration) efficiency test method" by the Japan Sanitary Materials Industry Association National Mask Industry Association. It is a value obtained according to the method.

[Examples 1 to 11, Comparative Examples 1 and 2]
Using the above-mentioned nonwoven fabrics A to E, the basic shapes are the shapes shown in FIGS. 1 (a) and 1 (b), and 13 types of masks having the features shown in Tables 2 to 4 below (Example 1). ~ 11 products, Comparative Examples 1 and 2) were produced. That is, according to the above description, using a high-frequency welder, first, the fabric shape (see FIG. 2) to be the mask main body is melted, and then two symmetrically shaped left and right fabrics are stacked. The planned welding portion (3'in FIG. 2) was welded to obtain a mask main body portion. Then, one of the following two types of double-sided adhesive tapes was selected according to Tables 2 to 4 below and attached to the mask main body to prepare a desired mask.

<Double-sided adhesive tape>
-Tape 1: Double-sided 2110R, manufactured by Nichiban Medical Co., Ltd. (3 types of width 15 mm, 20 mm, 25 mm)
-Tape 2: 1577, manufactured by 3M Ltd. (width 20 mm)

[Comparative Example 3]
As the mask fabric, not a polyurethane elastic non-woven fabric, but a polyethylene foam sheet according to Opcel LC-150 (manufactured by Sanwa Kako Co., Ltd.), which is a polyethylene foam sheet described in Patent Document 2 (Utility Model Registration No. 3227455). (In-house prototype) was used. A mask was produced in the same manner as in Example 1 except for the above.

[Comparative Example 4]
As the mask material, polypropylene non-woven fabric (Stratec [registered trademark] RW2050, manufactured by Idemitsu Unitech Co., Ltd.), which is widely used as a material for disposable masks, was used instead of polyurethane elastic non-woven fabric. A mask was produced in the same manner as in Example 1 except for the above.

These Example products and Comparative Example products are evaluated for each of the following items according to the following procedure, and the results are shown in Tables 2 to 4 below.

[Wearing feeling, etc.]
Eleven monitors were asked to wear each mask for 5 hours from 1:00 pm to 6:00 pm, and the fit to the face, the degree of freedom of the mouth when opening and closing the mouth, and the difficulty of peeling off from the face (adhesion). The three items were evaluated on a four-point scale of ◎… very good, ○… good, △… normal, ×… defective, and the most frequent evaluation was taken as the evaluation. When the same number of evaluations were lined up, all the members re-evaluated the lined up evaluations.

From the above results, it can be seen that all of the example products have a good wearing feeling and adhesion. On the other hand, in Comparative Example 1, the basis weight of the fabric is low and the fabric is too thin to be taut, so even if the three-dimensional shape is given, the fabric feels stuck to the mouth and the wearing feeling is poor. there were. Further, in the second product of Comparative Example, the basis weight of the fabric was high, the fabric was bulky, the followability to the face was insufficient, and the wearing feeling and the adhesion were poor. Further, the 3 products of Comparative Example and the 4 products of Comparative Example also had poor wearing feeling and adhesion.

The present invention has both excellent wearing feeling and adhesion, and can be widely used as an easy-to-use stick-on three-dimensional mask.

1 Mask body 2 Adhesive part 3 Welding part P Center line

Claims (7)

A mask provided with a mask main body for covering the nose and mouth and an adhesive portion for directly attaching the mask main body to the face.
The mask body is formed by welding two symmetrically shaped polyurethane elastic non-woven fabrics to the face by a welding portion extending vertically along a virtual center line P extending vertically in the center of the face. The shape is given,
The adhesive portion is formed in a band shape along the left and right edges of the mask main body portion.
A stick-on three-dimensional mask characterized in that the polyurethane elastic non-woven fabric constituting the mask main body portion has the following characteristics (1) to (4).
(1) Metsuke: 60-120 g / m ²
(2) Vertical (MD direction) and horizontal (CD direction) tensile strength: 1000 cN / 20 mm or more for both (3) Vertical and horizontal tensile elongation: 300% or more for both (4) Vertical and horizontal 100% elongation recovery rate in the direction: 90% or more for both The stickable three-dimensional mask according to claim 1, wherein the polyurethane elastic nonwoven fabric further has the following characteristics (5) and (6).
(5) Air permeability: 50cc / cm ² / sec or more (6) Maximum heat absorption rate (Q-max): 0.08 or more The sticking type three-dimensional mask according to claim 1 or 2, wherein the dimension d in the width direction across the longitudinal direction of the welded portion is 0.1 to 1.5 mm. The sticking type three-dimensional mask according to any one of claims 1 to 3, wherein the welded portion has an arc shape with a radius of curvature of 75 to 125 mm. The sticky three-dimensional mask according to any one of claims 1 to 4, wherein the adhesive portion is formed in a strip shape having a width of 10 to 25 mm. The sticky three-dimensional mask according to any one of claims 1 to 5, wherein at least the surface of the adhesive portion on the side with respect to the face is composed of a layer made of an acrylic adhesive. The adhesive portion is a multi-layered adhesive portion, and the surface on the side with respect to the face is composed of a layer made of an acrylic adhesive, and the surface on the side with respect to the polyurethane elastic nonwoven fabric is composed of a layer made of a synthetic rubber adhesive. The sticking type three-dimensional mask according to claim 6.

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