TW202126347A - Mask sheet and mask - Google Patents

Abstract

[Question] Make it difficult to peel off between gauze and non-woven fabric. [Technical content] A mask sheet (20) is a mask (1) that is joined to a non-woven fabric (10) containing thermally fused fibers, and is provided with: it is arranged closer to the non-woven fabric (10) than the aforementioned non-woven fabric (10) The gauze (40) on the skin side, and the thermally fused fiber layer (50) provided at least between the gauze (40) and the non-woven fabric (10), and the fibers of the thermally fused fiber layer (50) ( Part of 51) is entangled with the aforementioned gauze (40).

Description

Mask sheet and mask

The present invention relates to a sheet for a mask and a mask.

The mask body of a mask is known to be formed by joining gauze cloth made of cellulose fibers such as cotton and non-woven fabric. For example, the mask of Patent Document 1 uses a non-woven fabric containing thermally fused fibers and is integrated with gauze by thermal fusion. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 3-41459 Gazette

[The problem to be solved by the invention]

However, in the above-mentioned mask, only the dissolved fibers of the non-woven fabric (thermally bonded fibers) are incorporated into the gauze cloth and integrated, and there is a problem that the bonding strength of the non-woven fabric and the gauze cloth is weak and easy to peel off. If the non-woven fabric and the gauze are peeled off, the gauze on the skin side will come into contact with the wearer's mouth, and it may be difficult to breathe.

The present invention is made in view of the above-mentioned problems, and its object is to prevent the non-woven fabric and the gauze from peeling easily. [Technical means to solve the problem]

The main invention in order to achieve the above-mentioned object is a mask sheet, which is joined with a non-woven fabric containing thermally-bonded fibers to form a mask. In the thermally fused fiber layer between the gauze and the non-woven fabric, a part of the fibers of the thermally fused fiber layer is entangled with the gauze.

The other features of the present invention can be clarified from the description in this specification and the attached drawings. [Effects of the invention]

According to the present invention, it is possible to prevent the non-woven fabric and the gauze from peeling off easily.

According to the description in this manual and attached drawings, at least the following items can be clarified.

A mask sheet is formed by joining a non-woven fabric containing thermally-bonded fibers to form a mask, comprising: a gauze arranged on the skin side than the non-woven fabric, and at least one of the gauze and the non-woven fabric In the thermally fused fiber layer between, a part of the fibers of the thermally fused fiber layer is entangled with the gauze.

According to this mask sheet, the non-woven fabric and the thermally fused fiber layer can be surely joined (thermally fused) by heating, and the fibers of the thermally fused fiber layer are entangled with the gauze, so the gauze is not easy. Peel off from the thermally fused fiber layer. Therefore, it is possible to make it difficult to peel off between the non-woven fabric and the gauze.

In such a mask sheet, it is preferable that at least a part of the fibers entangled with the gauze of the heat-fusion type fiber layer protrude from the skin side of the gauze.

According to this mask sheet, it is easy to join members (members including fusible fibers) even on the skin side of the gauze. In addition, it is possible to strengthen the joint part with the side ear hooks and the like.

In such a mask sheet, it is preferable that among the fibers entangled with the gauze in the thermally fused fiber layer, the number of fibers protruding from the skin side of the gauze is higher than the number of fibers that do not protrude from the skin side. There are fewer roots.

According to such a mask sheet, the needle puncture sensation when wearing the mask can be reduced, and the skin contact becomes good.

In such a mask sheet, it is preferable that the fiber amount per unit area of the heat-fusion type fiber layer is greater on the non-skin side side of the gauze than the skin side side.

According to this mask sheet, good skin contact can be maintained, and the bonding strength with the non-woven fabric can be improved.

In such a mask sheet, it is preferable that the heat-fusion type fiber layer includes: a skin-side projecting portion provided on the skin side than the gauze ratio, and a non-skin protruding portion provided on the non-skin side than the gauze ratio. The maximum thickness of the non-skin-side projecting portion on the side is greater than the maximum thickness of the skin-side projecting portion.

According to this mask sheet, good skin contact can be maintained, and the bonding strength with the non-woven fabric can be improved.

In such a mask sheet, it is preferable that the mask is a pleated type, and the skin side surfaces of the gauze are folded so as to overlap each other, and the ends in the width direction are joined.

According to this mask sheet, a mask with a pleated structure can suppress the peeling between the non-woven fabric and the gauze, and is more effective.

In such a mask sheet, it is preferable that the heat-fusion type fiber layer contains hydrophilic fibers and hydrophobic fibers.

According to this mask sheet, by including hydrophilic fibers, moisture (the wearer's breath and sweat, etc.) can be absorbed, and the environment inside the mask can be kept comfortable. In addition, by including hydrophobic fibers, water can be dispersed and air permeability can be improved.

In such a mask sheet, it is preferable that the aforementioned non-woven fabric further contains non-thermally fused fibers.

According to this mask sheet, the degree of welding can be appropriately controlled.

In addition, the mask of the present invention is provided with: a gauze arranged on the skin side than the non-woven fabric, and a thermally fusible fiber layer provided at least between the gauze and the non-woven fabric and joined to the non-woven fabric, and the heat A part of the fibers of the fusion type fiber layer is entangled with the aforementioned gauze.

According to this mask, the non-woven fabric and gauze can be made difficult to peel off.

===Implementation === ＜The structure of mask 1＞ Fig. 1 is a plan view of the mask 1 viewed from the non-skin side. Fig. 2 is a plan view of the mask 1 viewed from the skin side. Figure 3 is a cross-sectional view taken along line X-X in Figure 1. The mask 1 has an up-down direction, a left-right direction, and a thickness direction that cross each other perpendicularly. In the thickness direction, the side facing the wearer's skin (the side relatively close to the wearer's skin when the mask 1 is worn) is set as the skin side, and the opposite side is set as the non-skin side. In the up-and-down direction, in the state where the mask 1 is worn, the side (nasal side) located vertically above is set to the upper side, and the opposite side (the chin side) is set to the lower side. In addition, in the left-right direction, when the mask 1 is worn, the side on the right side of the wearer (the right side when viewed from the skin side) is set to the right side, and the opposite side is set to the left side. In addition, the left-right direction corresponds to the width direction.

As shown in Figures 1 and 2, the mask 1 of this embodiment includes: a mask body 3 for covering the wearer's face (mouth and nose), and ear hooks extending from the mask body 3 Section 5.

The ear hooks 5 are hooked on the wearer's ears, corresponding to the wearer's ears, and are provided in a pair at both ends (right end 3c, left end 3d) of the mask body 3 in the left-right direction. In addition, the ear strap 5 is joined to the non-skin side surface of the mask body 3. The ear hook part 5 is preferably elastically stretchable, and may be formed of a known material such as rubber rope, non-woven fabric and woven fabric, and plastic film, for example.

The mask body 3 is formed in a rectangular shape long in the left-right direction when viewed from a plan view in a state before being worn (unused) as shown in Figs. 1 and 2. In addition, the mask main body 3 of the present embodiment is of a pleated type (pleated type) in which the non-skin side swells when being folded into a pleated shape. The mask body 3 is folded stepwise in the vertical direction by a plurality of fold lines (turned-back portions 35 described later) formed across the right end 3c and the left end 3d, thereby forming a plurality of pleated portions 30. These plural fold lines can be expanded when the mask 1 is worn except for the left and right ends.

The mask body 3 of the present embodiment mainly includes a non-woven fabric 10 and a mask sheet 20.

The non-woven fabric 10 can be formed by appropriately selecting materials with good air permeability from various known synthetic fiber non-woven fabrics such as melt-blown non-woven fabrics, spun-bonded non-woven fabrics, SMS non-woven fabrics, and breathable non-woven fabrics. The nonwoven fabric 10 of the present embodiment has a structure including thermally fused fibers (thermoplastic fibers). Examples of the heat-fusion type fiber include polyolefin-based fibers such as polyethylene (PE) fibers and polypropylene (PP) fibers, polyester-based fibers, and polyamide-based fibers such as nylon. In addition, the nonwoven fabric 10 may contain fibers other than the thermally fused fiber (that is, the non-thermally fused fiber). Thus, by adjusting the amount of non-thermally fusion-bonded fibers, the degree of fusion can be appropriately controlled when the fusion-bonded portion 36 (described later) is formed.

The mask sheet 20 is a sheet member arranged on the skin side than the nonwoven fabric 10, and has a structure including a gauze 40 and a thermally fused fiber web 50 (corresponding to a thermally fused fiber layer). The details of the mask sheet 20 will be described later.

In addition, the mask body 3 of the present embodiment is provided with a holding member 31, a side sheet 32, a notch 33, a nose cover 34, a folded part 35, and a welded part 36.

The holding member 31 is a thin-plate rectangular member provided on the upper end 3a side of the mask body 3, and is a member for holding the upper end edge in a predetermined shape. The holding member 31 is arranged between the folded part of the mask body 3 (the part where the mountain fold 35a is folded), and is fixed without positional deviation by a plurality of welded parts 36 formed around it. .

The holding member 31 is preferably formed of a flexible thermoplastic tree (for example, plastic) or the like. This kind of holding member 31 can be easily bent by the wearer, and once deformed into a predetermined shape, the predetermined shape can be maintained as long as external force is no longer applied. Therefore, if the wearer deforms the holding member 31 to match the shape of the nose after wearing the mask 1, the holding member 31 can hold the vicinity of the upper end of the mask body 3 in a state that matches the shape of the wearer's nose. Thereby, it is possible to suppress the occurrence of a gap between the upper edge of the mask body 3 and the wearer's face.

The side sheet 32 is provided at the right end 3c and the left end 3d of the mask body 3 so as to cover the skin side and the non-skin side. That is, the side sheet 32 is fixed (joined) in a state where the end portions in the left-right direction of the nonwoven fabric 10 and the mask sheet 20 are pinched from the thickness direction. By providing such a side sheet 32, it is possible to prevent the yarns at the ends of the gauze cloth 40 (the structural yarn 41 to be described later) from being scattered, and it is possible to improve the bonding strength with the ear hooks 5 and the like.

The side sheet 32 is similar to the non-woven fabric 10, and can be formed by appropriately selecting materials with good air permeability from various known synthetic fiber non-woven fabric sheets such as melt-blown non-woven fabric, spun-bonded non-woven fabric, SMS non-woven fabric, and air-permeable non-woven fabric. In addition, the side sheet 32 may also use a material composed of a fabric and a knitted fabric. However, since it is not easy to irritate the wearer's skin (face), non-woven fabric is preferable.

The notch 33 is provided at both ends (right end 3c, left end 3d) (a pair) in the left-right direction of the nonwoven fabric 10 and the mask sheet 20 constituting the mask body 3, respectively, and is covered by the side sheet 32. The notch 33 has a concave shape toward the center of the mask body 3 in the left and right direction. More specifically, the length in the vertical direction is gradually shortened from the end in the left and right direction toward the center to become a substantially V-shape. However, it is not limited to this shape, and various well-known shapes such as a singular or plural linear shape and a curved shape may be used. By providing the notch 33, when the mask 1 is used, the notch 33 becomes the starting point of deformation and is easily deformed. Therefore, it is possible to improve the adhesion with the wearer's face (improve the mask body 3 facing the face). Department of fit).

The nose cover part 34 extends downward from the upper end 3a on the skin side of the mask body 3, the upper end is a fixed end, and the lower end is a free end. More specifically, the nose cover part 34 is the mask body 3 (here, the non-woven fabric 10) that is joined to the upper end 3a by welding or thermally fusing an adhesive and is folded back toward the skin. The nose cover 34 is made of the same non-woven fabric as the non-woven fabric 10. This nose cover part 34 further suppresses the contact of the gauze 40 of the mask sheet 20 with the wearer's face (nose part), and suppresses the strange feeling caused by wearing the mask 1. Moreover, even if there is no nose cover part 34, it does not matter.

The turned-back portion 35 is a portion where the non-woven fabric 10 and the mask sheet 20 constituting the mask body 3 are turned back. As shown in Fig. 3, the folded parts 35 are formed in plural respectively: the skin side faces of the mask sheet 20 are folded mountain folds 35a superimposed on each other, and the non-skin side faces of the non-woven fabric 10 are folded valley folds superposed on each other.部35b. As a result, a plurality of wrinkles 30 are formed in the mask body 3.

In addition, in the mountain folded portion 35a in the lower end 3b, only the nonwoven fabric 10 is folded back, and the folded nonwoven fabric 10 is joined to the skin side of the mask sheet 20 (refer to Figs. 2 and 3). In the mountain fold 35a at the upper end 3a, the folded mask bodies 3 are joined with the holding member 31 sandwiched therebetween, and further, as described above, the nose cover 34 is joined to the skin side. In the mask sheet 20 of this embodiment, as will be described later, since there are layers of thermally fusion-bonded fibers on both sides of the gauze 40, it can be surely joined at the folded portion as described above.

In addition, at the ends in the left-right direction (right end 3c, left end 3d), the nonwoven fabric 10 and the mask sheet 20 are joined to the side sheet 32 while being pinched in the thickness direction in a state of being folded into a pleat shape. Here, by using the mask sheet 20, it is also possible to improve the bonding strength between the parts folded in a wrinkle shape. Therefore, since the bonding strength at this portion is improved, the side sheet 32 can also be omitted.

The welding part 36 is a part where each member is joined by thermal welding, and is provided in plural in the mask body 3. In addition, in the lower left portion of the mask body 3 of the present embodiment, a pattern 36a in which a plurality of fine welded parts 36 are arranged in a pattern is provided. The pattern 36a in the mask 1 of this embodiment is a letter (abc) forming a Roman alphabet. By providing such a pattern 36a, the front and back (skin side, non-skin side) of the mask 1 can be easily recognized, and the wrong installation direction of the mask 1 can be prevented. Particularly in the present embodiment, by using the mask sheet 20, the pattern 36a is easily noticeable. Moreover, the pattern 36a is not limited to the one shown in the figure, and it is preferable that the front and back (skin side, non-skin side) of the mask 1 can be recognized (left-right asymmetry). For example, it may be a character, symbol, figure, arrow, etc. other than the Roman alphabet.

＜Structure of sheet 20 for masks＞ As described above, the mask body 3 of the present embodiment is mainly composed of two sheet members including a non-woven fabric 10 containing thermally-bonded fibers and a mask sheet 20. In addition, the mask sheet 20 has gauze 40 made of cotton yarn or the like.

Assuming that the non-woven fabric 10 and the gauze 40 are directly joined by thermal welding, the gauze 40 does not contain thermally fused fibers, so the dissolved fibers of the non-woven fabric 10 will be integrated into the fabric of the gauze 40. change. In this case, the bonding strength of the non-woven fabric 10 and the gauze 40 is weak, and it is easy to peel off. If the non-woven fabric 10 and the gauze 40 are peeled off, the gauze 40 may come into contact with the wearer's mouth, and the wearer may have difficulty breathing. Here, in the present embodiment, by using the mask sheet 20, the non-woven fabric 10 and the gauze 40 are not easily peeled off.

Fig. 4 is a partially enlarged view of the mask sheet 20 viewed from the skin side, and Fig. 5 is a diagram showing a state in which the mask sheet 20 is separated into the gauze 40 and the thermally fused fiber web 50. As shown in Figs. 4 and 5, the mask sheet 20 is made of gauze 40 and the fibers 51 (thermally bonded fibers) of the thermally fused fiber web 50 that are entangled with each other (gauze 40 and thermally fused fiber). The fiber web 50 is entangled) and integrated sheet member. The manufacturing method of the sheet 20 for masks which entangles the gauze 40 and the heat-fusion type fiber web 50 mutually is as follows.

As shown in Fig. 4, the gauze 40 is composed of structural yarn 41 woven in a lattice pattern. The structural yarn 41 has a plurality of warp yarns 42 and a plurality of weft yarns 43 intersecting with the warp yarns 42. The warp yarns 42 and the weft yarns 43 intersect each other to form a plurality of weaving holes 45 in the thickness direction (the through-holes are surrounded by the warp yarns 42 and the weft yarns 43). field). The structural yarn 41 of the gauze 40 is a twisted yarn formed by twisting a raw yarn composed of cotton yarn (cotton fiber). Among raw yarn materials, in addition to cotton fibers, it is best to use cellulose fibers such as natural cellulose fibers such as hemp and pulp fibers, regenerated cellulose fibers such as rayon, and semi-synthetic cellulose fibers such as acetate. . The cotton yarn used in the original yarn is preferably 10-100 cotton yarn (length per unit weight, length/weight). In addition, the weave (knitting method) of the gauze 40 is not limited to a grid-like plain weave, and known weaves such as twill weave, satin weave, and wrap weave can be suitably used.

The thermally fused fiber web 50 (thermally fused fiber layer) is a spunbond method using long fibers, or a dry method in which short fibers are carded in a certain direction from a carding machine, and the fibers are carded to form a web. The fiber assembly formed by a known manufacturing method such as that is in a state before being formed into a non-woven fabric. The fibers 51 of the thermally fused fiber web 50 are thermally fused fibers exemplified in the description of the nonwoven fabric 10 that can be used. In addition, the thermally fused fiber web 50 is not limited to being formed by a carding method using a carding machine, and may be formed by a method such as an airlaid method, a wet method, a spunbond method, and a meltblown method.

The thermally fusion type fiber web 50 of the present embodiment is provided at least between the gauze 40 and the non-woven fabric 10 (refer to FIG. 6), and a part of the fiber 51 is entangled with the gauze 40. Thereby, by heating the nonwoven fabric 10 containing the thermally fused fiber and the thermally fused fiber web 50, it is possible to surely join (weld), and because the fibers 51 of the thermally fused fiber web 50 are bonded to the gauze 40 Because of entanglement, the gauze 40 is not easily peeled off from the thermally fused fiber web 50. Therefore, it is possible to make it difficult to peel off between the nonwoven fabric 10 and the gauze 40.

The fiber density of the thermally fused fiber web 50 is, for example, 2.8 to 3.5×10 ^-3 g/cm ³ , and the basis weight (weight per unit area) is, for example, 20 to 70 g/m ² . The thickness of the thermally fused fiber web 50 is, for example, 7 to 20 mm, and the fiber length of the thermally fused fiber web 50 is, for example, 1 to 100 mm. In addition, the fineness of the thermally fused fiber web 50 is, for example, 0.1 to 6 dtex.

In addition, the fibers 51 of the thermally fusion type fiber web 50 of the present embodiment include hydrophilic fibers and hydrophobic fibers. Hydrophobic fibers can use polyester series including polyethylene terephthalate (PET), polypropylene (PP), polyolefin series including polyethylene (PE), and a core sheath composed of PP and PE. Composite fibers such as structured composite fibers and side-by-side composite fibers. Hydrophilic fibers include, for example, rayon, hydrophilized fibers and composite fibers. In addition, the hydrophilization treatment is modified to hydrophilic by applying a surfactant on the surface to reduce the contact angle of the fiber surface. In this case, the surfactants that are preferably used include nonionic surfactants such as hydrophilic silicone oil, anionic surfactants, cationic surfactants, and amphoteric surfactants.

By making the heat-fusible fiber web 50 contain hydrophilic fibers, it can absorb moisture (the wearer’s breath and sweat, etc.), and can keep the inside of the mask (between the mask 1 and the wearer’s face) The environment is comfortable. In addition, by making the heat-fusion type fiber web 50 contain hydrophobic fibers, moisture can be dispersed and air permeability can be improved.

In addition, the thermally fused fiber web 50 contains hydrophilic fibers and hydrophobic fibers. The blending ratio of hydrophilic fibers and hydrophobic fibers is the weight of hydrophobic fibers contained per unit volume, which is higher than that per unit volume. It is preferable that the weight of the hydrophilic fiber contained is larger. As a result, water can be dispersed more easily, and air permeability can be improved.

The method of entanglement and integration of the gauze 40 and the heat-fusion type fiber web 50 (the manufacturing method of the sheet 20 for masks), for example, can use a well-known water-flow entanglement method. In the manufacturing process of the liquid-permeable sheet by the water flow entanglement method, the material of the gauze 40, that is, the upper surface of the continuous grid-like fabric (here, the non-skin side 40a), is a thermally fused fiber web. The material of 50, which is a continuous laminate in which an aggregate of continuous fibers is laminated, sprays a high-pressure water stream from a plurality of nozzles arranged at intervals in a direction intersecting the conveying direction of the continuous laminate. That is, as shown in FIG. 5, the heat-fusion type fiber web 50 is superposed on the upper surface of the gauze 40, and a high-pressure water stream is sprayed from the upper side (non-skin side) to the lower side. Thereby, the constituent fibers (fibers 51) of the thermally fusion-bonded fiber web 50 and the structural yarns 41 of the gauze 40 can be entangled with each other and integrated. Moreover, it is also possible to give a pattern to the integrated sheet by the pressure of water.

When the water flow is entangled, the above-mentioned continuous laminate, which is laminated with the continuous gauze 40 and the thermally fused fiber web 50, is conveyed by a conveying means composed of a metal mesh belt, from the nozzle When the high-pressure water jet is sprayed on the upper surface of the continuous laminate, the fibers 51 of the thermally fused fiber web 50 and the structural yarn 41 of the gauze 40 are entangled on the upper side, and the lower side facing the conveying means is also passed The splashing water flow in contact with the conveying means is entangled. In addition, according to the water flow entanglement method, by appropriately changing the structure of the mesh belt of the conveying means, it is possible to obtain the mask sheet 20 having the desired sheet characteristics such as thickness, mass, absorption speed, and sheet strength.

Fig. 6 is a cross-sectional view taken along the line Y-Y in Fig. 4, and the non-woven fabric 10 on the non-skin side of the mask sheet 20 is shown by a broken line. Referring to Fig. 6, in the mask sheet 20, the fibers 51 of the thermally fused fiber web 50 are entangled with the gauze 40, and a part of the fibers 51 entangled with the gauze 40 protrudes from the skin side 40b of the gauze 40 (Stretching out). Thereby, it is also easy to join a member (a member containing a thermally fusion type fiber, etc.) to the skin side surface 40b of the gauze 40. As shown in FIG. For example, at the lower end 3b of the mask body 3, the folded nonwoven fabric 10 is easily joined to the skin side of the mask sheet 20 (the skin side surface 40b of the gauze 40). In addition, the joint portion with the ear hook 5 and the like can be strengthened.

In this way, the heat-fusion type fiber web 50 includes: the skin-side projecting portion 52 provided on the skin side than the skin side 40b of the gauze 40, and the non-skin side surface 40a provided on the non-skin side 40a of the gauze 40. The non-skin side protruding part 53 on the skin side. The non-skin-side projecting portion 53 is a portion that is directly sprayed by a high-pressure water flow when it is formed by the water entanglement method. On the other hand, the protruding portion 52 on the skin side is a portion penetrating between the lattice-shaped structural yarn 41 and the structural yarn 41 of the gauze 40 located below when it is sprayed by the high-pressure water jet, and extending toward the conveying means, that is, the mesh belt side. .

In the mask sheet 20 of the present embodiment thus manufactured, among the fibers 51 entangled with the gauze 40 of the thermally fused fiber web 50, the number of the fibers 51 protruding from the skin side 40b of the gauze 40 becomes The number of fibers 51 that does not protrude from the skin side surface 40b is smaller. In this way, by reducing the number of fibers 51 protruding from the skin side 40b of the gauze 40, it is possible to reduce the puncture feeling when the mask 1 is worn, and the skin contact becomes good.

Also, for example, a manufacturing method other than the water entanglement method may be used to make the number of fibers 51 protruding from the skin side 40b of the gauze 40 out of the fibers 51 entangled with the gauze 40 of the thermally fused fiber web 50 than The number of fibers 51 that do not protrude from the skin side surface 40b is larger. In this case, by increasing the number of fibers 51 protruding from the skin side surface 40b of the gauze 40, the mutual entanglement in the sides of the skin side surface 40b can be strengthened, and the gauze 40 is less likely to be peeled from the thermally fused fiber web 50. Therefore, the non-woven fabric 10 and the gauze 40 are less likely to peel off.

And as shown in Fig. 6, the fiber amount per unit area of the thermally fused fiber web 50 is on the side of the non-skin side 40a of the gauze 40 (non-skin side extension 53) than the side of the skin side 40b (skin side 40b). The side protrusion 52) is more preferable. Thereby, the skin contact can be maintained well, and the bonding strength with the non-woven fabric 10 can be improved.

And in Figure 6, the thickness from the skin side 40b of the gauze 40 to the point 51a where the skin-side extension 52 protrudes on the most skin side is set as the maximum thickness D1 of the skin-side extension 52. If the thickness from the non-skin side 40a of 40 to the point 51b where the non-skin-side projecting portion 53 protrudes on the most non-skin side is set to the maximum thickness D2 of the non-skin-side projecting portion 53, the thickness of the non-skin-side projecting portion 53 is The maximum thickness D2 is preferably greater than the maximum thickness D1 of the protruding portion 52 on the skin side. In this way, by making the maximum thickness D2 of the non-skin-side projecting portion 53 of the thermally fused fiber web 50 larger, it is possible to maintain good skin contact and increase the bonding strength with the nonwoven fabric 10.

In addition, the maximum thickness D1 and the maximum thickness D2 are the thickness of the appearance, and the measurement of the thickness dimension is preferably, for example, first, the mask sheet 20 is cut along the thickness direction of the thermally fused fiber web 50, and the cut surface The enlarged photos of KEYENCE were taken with the digital microscope VHX-1000 manufactured by KEYENCE. Based on this enlarged photograph, measure the interval size (D1) from the skin side 40b of the gauze 40 to the point 51a where the skin-side projecting portion 52 protrudes on the most skin side, and measure from the non-skin side 40a of the gauze 40 to the non-skin side The distance (D2) from the point 51b where the protruding portion 53 protrudes on the most non-skin side. In this way, the thickness dimensions (the maximum thickness D1 and the maximum thickness D2) can be measured.

Table 1 shows the measurement results of the peel strength of the gauze 40 and the non-woven fabric 10. Here, for the case of the gauze 40 alone and the case where the thermally fused fiber web 50 is entangled with the gauze 40 (the amount of thermally fused fiber is two different types), the gap between the gauze 40 and the non-woven fabric 10 is measured. Peel strength. In addition, the peel strength is measured by pinching the sample (sample width 25mm) on the pinch plate of the load tester manufactured by SHIMADZU, and measuring at a test speed of 100 mm/min. Each value in Table 1 shows the maximum point test force in the measurement.

In Table 1, the peel strength of the entanglement of the thermally fused fiber web 50 with the gauze 40 is higher than the peel strength of the gauze 40 alone. And, the more the amount of heat-fusion fiber, the higher the peel strength. In this way, it can be confirmed that by entanglement of the heat-fusion type fiber web 50 with the gauze 40 (to make the mask sheet 20), the gauze 40 and the non-woven fabric 10 are not easily peeled off.

As described above, the mask 1 of the present embodiment is provided with a non-woven fabric 10 containing thermally-bonded fibers, and a mask sheet 20 joined to the non-woven fabric 10. The mask sheet 20 is provided with: a gauze 40 arranged on the skin side than the non-woven fabric 10, and a thermally fused fiber web 50 and a thermally fused fiber web 50 provided at least between the gauze 40 and the non-woven fabric 10 A part of the fiber 51 (thermal fusion type fiber) is entangled with the gauze 40.

Thus, by heating the nonwoven fabric 10 and the thermally fused fiber of the thermally fused fiber web 50, they can be surely joined (thermally fused), and because the fibers 51 of the thermally fused fiber web 50 are bonded to the gauze Because of entanglement, the gauze 40 is not easily peeled off from the thermally fused fiber web 50. Therefore, it is possible to make it difficult to peel off between the nonwoven fabric 10 and the gauze 40.

===Other embodiments === Although the embodiments of the present invention have been described above, the above-mentioned embodiments are only for facilitating the understanding of the present invention, and do not limit the interpretation of the present invention. In addition, the present invention can be changed and improved as long as it does not deviate from its purpose, and of course, the present invention also includes equivalents. For example, the possible variants shown below.

In the aforementioned embodiment, the mask 1 (mask body 3) is a pleated type, but it is not limited to this. For example, it may be a flat type, a three-dimensional type, a cup type, or the like. However, as described above, the surface of the mask sheet 20 in a folded state (the skin side of the gauze 40 is 40b) can be easily joined to each other. Therefore, the effect is better in the case of the pleated type.

In the aforementioned embodiment, the mask body 3 has a structure in which the non-woven fabric 10 and the mask sheet 20 are laminated, but it is not limited to this. For example, other sheet members (non-woven fabric, etc.) may be further laminated.

1: mask 3: Mask body 3a: upper end 3b: bottom 3c: Right end 3d: left end 5: Earhook 10: Non-woven fabric 20: Sheets for masks 30: folds 31: Holding member 32: side sheet 33: Notch 34: Nose cover 35: Turnback Department 35a: Shanzhebe 35b: Valley Fold 36: Welding part 36a: pattern 40: Gauze 40a: Non-skin side 40b: Side of the skin 41: structural yarn 42: warp 43: Weft 45: Weaving Hole 50: Hot-melt fiber web (hot-melt fiber layer) 51: Fiber 51a: point 51b: point 52: The protruding part of the skin side 53: The protruding part of the non-skin side D1, D2: Maximum thickness

[Figure 1] A plan view of the mask 1 viewed from the non-skin side. [Figure 2] A plan view of the mask 1 as viewed from the skin side. [Figure 3] A cross-sectional view taken along line X-X in Figure 1. [Figure 4] A partial enlarged view of the case where the mask sheet 20 is viewed from the skin side. [Fig. 5] A diagram showing a state where the mask sheet 20 is separated into a gauze cloth 40 and a heat-fusion type fiber web 50. [Figure 6] A cross-sectional view along the line Y-Y in Figure 4.

10: Non-woven fabric

20: Sheets for masks

40: Gauze

40a: Non-skin side

40b: Side of the skin

42: warp

43: Weft

50: Hot-melt fiber web (hot-melt fiber layer)

51: Fiber

51a: point

51b: point

52: The protruding part of the skin side

53: The protruding part of the non-skin side

Claims (9)

A sheet for masks, The mask is constructed by being joined to a non-woven fabric containing thermally fused fibers, and it has: The gauze placed on the skin side than the aforementioned non-woven fabric ratio, and At least a thermally fused fiber layer provided between the gauze and the non-woven fabric, A part of the fibers of the thermal fusion type fiber layer is entangled with the gauze. Such as the sheet for masks of claim 1, in which, At least a part of the fibers entangled with the gauze of the thermally fusion type fiber layer protrudes from the skin side of the gauze. Such as the mask sheet of claim 2, in which, Among the fibers entangled with the gauze in the thermally fusion type fiber layer, the number of fibers protruding from the skin side of the gauze is smaller than the number of fibers not protruding from the skin side. For example, the mask sheet of claim 2 or 3, in which, The fiber amount per unit area of the heat-fusion type fiber layer is larger on the non-skin side side of the gauze than the skin side side. Such as the sheet for masks in any one of Claims 2 to 4, wherein: The thermally fused fiber layer includes a skin-side projecting portion provided on the skin side than the gauze ratio, and a non-skin-side projecting portion provided on the non-skin side than the gauze ratio. The maximum thickness of the protruding portion on the non-skin side is larger than the maximum thickness of the skin side portion. Such as the sheet for masks in any one of Claims 2 to 5, wherein: The aforementioned mask is a pleated type, The gauze is folded so that the skin side surfaces are superimposed on each other, and the ends in the width direction are joined. Such as the sheet for masks of any one of claims 1 to 6, in which: The aforementioned thermally fusion type fiber layer includes hydrophilic fibers and hydrophobic fibers. Such as the sheet for masks of any one of claims 1 to 7, in which: The aforementioned non-woven fabric further contains non-thermally fused fibers. A mask with: Non-woven fabrics containing thermally bonded fibers, and The gauze placed on the skin side than the aforementioned non-woven fabric ratio, and At least a thermally fusion type fiber layer provided between the gauze and the non-woven fabric and joined to the non-woven fabric, A part of the fibers of the thermal fusion type fiber layer is entangled with the gauze.

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