TWI865657B - Mask sheet and mask - Google Patents

Abstract

[Topic] Making it difficult for gauze and nonwoven fabric to be peeled off. [Technical content] A mask sheet (20) is formed by being joined to a nonwoven fabric (10) containing heat-fusible fibers to form a mask (1), comprising: a gauze (40) arranged closer to the skin than the nonwoven fabric (10), and a heat-fusible fiber layer (50) at least provided between the gauze (40) and the nonwoven fabric (10), wherein a portion of fibers (51) of the heat-fusible fiber layer (50) are entangled with the gauze (40).

Description

Mask sheet and mask

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

The mask body of the mask is known to be formed by joining gauze formed of cellulose fibers such as cotton and non-woven fabric. For example, the mask of Patent Document 1 uses a non-woven fabric containing heat-fusible fibers and integrates it with the gauze by heat fusion. [Prior Art Document] [Patent Document]

[Patent Document 1] Japanese Utility Model Publication No. 3-41459

[The problem the invention is trying to solve]

However, in the above-mentioned masks, only the dissolved fibers (thermal fusion fibers) of the nonwoven fabric are integrated into the gauze fabric, and the bonding strength between the nonwoven fabric and the gauze is weak and easily peeled off. If the nonwoven fabric and the gauze peel off, the gauze on the skin side will come into contact with the wearer's mouth, which may make breathing difficult.

The present invention is made in view of the above-mentioned problem, and its purpose is to make the nonwoven fabric and the gauze fabric less likely to be peeled off. [Technical means for solving the problem]

The main invention for achieving the above-mentioned purpose is a mask sheet which is joined to a non-woven fabric containing heat-fusible fibers to form a mask, and comprises: a gauze cloth arranged closer to the skin than the non-woven fabric, and a heat-fusible fiber layer at least arranged between the gauze cloth and the non-woven fabric, wherein a part of the fibers of the heat-fusible fiber layer are entangled with the gauze cloth.

Other features of the present invention can be clarified through the description in this specification and the attached drawings. [Effects of the invention]

According to the present invention, the nonwoven fabric and the gauze fabric can be prevented from being easily separated.

At least the following matters can be clarified through the description in this manual and the attached drawings.

A mask sheet is formed by being joined to a nonwoven fabric containing heat-fusible fibers, and comprises: a gauze fabric arranged closer to the skin than the nonwoven fabric, and a heat-fusible fiber layer at least provided between the gauze fabric and the nonwoven fabric, wherein a part of the fibers of the heat-fusible fiber layer are entangled with the gauze fabric.

According to this mask sheet, the nonwoven fabric and the heat-fusible fiber layer can be reliably joined (heat-fused) by heating, and the gauze is not easily peeled off from the heat-fusible fiber layer because the fibers of the heat-fusible fiber layer are entangled with the gauze. Therefore, the nonwoven fabric and the gauze can be made to be difficult to peel off.

In the mask sheet, at least a portion of the fibers of the heat-fused fiber layer entangled with the gauze preferably protrude from the skin side of the gauze.

According to this mask sheet, it is easy to join the member (member including the fusible fiber) even on the skin side of the gauze. In addition, the joining portion with the ear hook portion on the side can be strengthened.

In the mask sheet, preferably, among the fibers entangled with the gauze in the heat-fused fiber layer, the number of fibers protruding from the skin-facing side of the gauze is smaller than the number of fibers not protruding from the skin-facing side.

If this type of mask sheet is used, the pricking sensation when wearing the mask can be reduced, and the skin contact can be improved.

Preferably, the mask sheet has a fiber mass per unit area of the heat-fused fiber layer that is greater on the non-skin side of the gauze than on the skin side.

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

Preferably, the heat-fused fiber layer comprises a skin-side extending portion disposed closer to the skin than the gauze, and a non-skin-side extending portion disposed closer to the non-skin side than the gauze, wherein the maximum thickness of the non-skin-side extending portion is greater than the maximum thickness of the skin-side portion.

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

The mask sheet is preferably a pleated type mask, wherein the skin-side surfaces of the gauze are folded so as to overlap each other and the ends in the width direction are joined.

By using this mask sheet, a mask with a pleated structure can be made, and the peeling between the non-woven fabric and the gauze can be suppressed, and the effect can be improved.

The mask sheet is preferably such that the thermally fused fiber layer comprises hydrophilic fibers and hydrophobic fibers.

According to this mask sheet, by including hydrophilic fibers, moisture (such as breath and sweat of the wearer) can be absorbed to keep the environment inside the mask comfortable. In addition, by including hydrophobic fibers, moisture can be dispersed to improve ventilation.

The mask sheet is preferably such that the non-woven fabric further comprises non-thermal fusion-bonding fibers.

By using this mask sheet, the degree of welding can be appropriately controlled.

The mask of the present invention comprises: a gauze cloth arranged closer to the skin than the non-woven cloth, and a heat-fused fiber layer at least arranged between the gauze cloth and the non-woven cloth and joined to the non-woven cloth, wherein a part of the fibers of the heat-fused fiber layer are entangled with the gauze cloth.

According to this mask, the non-woven fabric and the gauze fabric will not be easily peeled off.

===Implementation method=== <Structure of mask 1> Figure 1 is a top view of the mask 1 viewed from the non-skin side. Figure 2 is a top view of the mask 1 viewed from the skin side. Figure 3 is a cross-sectional view of the X-X line in Figure 1. The mask 1 has vertical directions, horizontal directions, and a thickness direction that intersect each other perpendicularly. In the thickness direction, the side facing the wearer's skin (the side that is 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 vertical direction, when the mask 1 is worn, the side located vertically above (nose side) is set as the upper side, and the opposite side (chin side) is set as the lower side. Furthermore, in the left-right direction, when the mask 1 is worn, the side located on the right side of the wearer (the right side when viewed from the skin side) is set as the right side, and the opposite side is set as the left side. In addition, the left-right direction is equivalent 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 an ear hook 5 extending from the mask body 3.

The ear hanging part 5 is a part hung on the ear of the wearer, and a pair of ear hanging parts 5 are provided at the two ends (right end 3c, left end 3d) in the left and right directions of the mask body 3 corresponding to the two ears of the wearer. In addition, the ear hanging part 5 is joined to the non-skin side of the mask body 3. The ear hanging part 5 is preferably elastically stretchable, and can be formed by a known material such as a rubber rope, a non-woven fabric, a woven fabric, a plastic film, etc.

As shown in FIG. 1 and FIG. 2, the mask body 3 is in a rectangular shape that is long in the left-right direction when viewed from above before being worn (unused). Moreover, the mask body 3 of this embodiment is folded into a pleated shape, and is a pleated type (pleated type) that bulges on the non-skin side when worn. The mask body 3 is folded in stages in the up-down direction by a plurality of fold lines (the folding part 35 described later) formed across the right end 3c and the left end 3d, thereby forming a plurality of pleated parts 30. These plurality of fold lines can be unfolded when the mask 1 is worn, except for the two end parts in the left-right direction.

The mask body 3 of this embodiment mainly has a structure of a non-woven fabric 10 and a mask sheet 20.

The nonwoven fabric 10 can be formed by appropriately selecting a material with good air permeability from various well-known synthetic fiber nonwoven fabrics such as meltblown nonwoven fabrics, spunbond nonwoven fabrics, SMS nonwoven fabrics, and breathable nonwoven fabrics. The nonwoven fabric 10 of the present embodiment is a structure including heat-fusible fibers (thermoplastic fibers). The heat-fusible fibers are polyolefin fibers such as polyethylene (PE) fibers and polypropylene (PP) fibers, polyester fibers, and polyamide fibers such as nylon. In addition, the nonwoven fabric 10 can also include fibers other than heat-fusible fibers (i.e., non-heat-fusible fibers). Thus, by adjusting the amount of the non-thermal fusion-bonding type fiber, when forming the fusion bonded portion 36 (described later), the degree of fusion bonding can be appropriately controlled.

The mask sheet 20 is a sheet member disposed on the skin side of the nonwoven fabric 10, and has a structure of 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 the mask body 3 of the present embodiment, there are provided: a holding member 31, a side sheet 32, a notch portion 33, a nose cover portion 34, a folded portion 35, and a welded portion 36.

The holding member 31 is a thin rectangular member provided on the upper end 3a side of the mask body 3, and is used to hold the upper edge portion in a predetermined shape. The holding member 31 is disposed between the folded back portions of the mask body 3 (the portion folded at the mountain fold portion 35a described later), and is fixed by a plurality of welded portions 36 formed around the circumference so as not to be displaced.

The retaining member 31 is preferably formed of a flexible thermoplastic material (such as plastic). The retaining 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 no external force is applied. Therefore, if the wearer deforms the retaining member 31 to match the shape of the nose after wearing the mask 1, the retaining member 31 can keep the upper end of the mask body 3 in a state that matches the shape of the wearer's nose. In this way, the occurrence of a gap between the upper edge of the mask body 3 and the wearer's face can be suppressed.

The side sheets 32 are provided at the right end 3c and the left end 3d of the mask body 3 to cover the skin side and the non-skin side. That is, the side sheets 32 fix (join) the ends of the non-woven fabric 10 and the mask sheet 20 in the left and right directions while holding them in the thickness direction. By providing such side sheets 32, the yarn (structural yarn 41 described later) at the ends of the yarn cloth 40 can be prevented from being scattered, and the joining strength with the ear hook 5 and the like can be improved.

The side sheets 32 can be formed by appropriately selecting a material with good air permeability from various known synthetic fiber nonwoven fabric sheets such as melt-blown nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, and breathable nonwoven fabric, as is the case with the nonwoven fabric 10. Also, the side sheets 32 can also be made of a material made of woven fabric or knitted fabric. However, nonwoven fabric is preferred because it is less likely to irritate the wearer's skin (face).

The notch 33 is provided at both ends (right end 3c, left end 3d) (a pair) in the left-right direction of the non-woven fabric 10 and the mask sheet 20 constituting the mask body 3, and is covered by the side sheet 32. Moreover, the notch 33 is concave toward the central part of the left-right direction of the mask body 3, and more specifically, the length in the vertical direction gradually shortens from the left-right end toward the center to form an approximately V-shaped shape. However, it is not limited to this shape, and various known shapes such as a single or multiple straight line shape, a curved line shape, etc. can also be used. By providing the notch 33, when the mask 1 is used, because the notch 33 becomes the starting point of deformation and is easy to deform, the closeness with the wearer's face can be improved (the fit of the mask body 3 to the face is improved).

The nose cover 34 extends downward from the upper end 3a on the skin side of the mask body 3, with the upper end being a fixed end and the lower end being a free end. More specifically, the nose cover 34 is the mask body 3 (here, the nonwoven fabric 10) that is joined to the upper end 3a and folded back toward the skin side by welding or heat-fusion adhesive. The nose cover 34 is made of the same nonwoven fabric as the nonwoven fabric 10. This nose cover 34 further suppresses the gauze 40 of the mask sheet 20 from contacting the wearer's face (nose part), thereby suppressing the strange feeling caused by wearing the mask 1. In addition, it is also possible to have no nose cover 34.

The folded portion 35 is a portion where the nonwoven fabric 10 and the mask sheet 20 constituting the mask body 3 are folded back. As shown in FIG. 3 , the folded portion 35 is formed in plurality: a mountain fold 35a where the skin-facing side of the mask sheet 20 is folded in an overlapping manner, and a valley fold 35b where the non-skin-facing side of the nonwoven fabric 10 is folded in an overlapping manner. Thus, a plurality of pleated portions 30 are formed in the mask body 3.

In the mountain fold 35a at the lower end 3b, only the non-woven fabric 10 is folded back, and the folded back non-woven fabric 10 is joined to the skin side of the mask sheet 20 (see Fig. 2 and Fig. 3). In the mountain fold 35a at the upper end 3a, the folded back mask bodies 3 are joined to each other with the retaining member 31 held therebetween, and further, as described above, the nose cover 34 is joined to the skin side thereof. The mask sheet 20 of this embodiment, as described later, has a layer of heat-fusible fiber on both sides of the gauze 40, so that it can be reliably joined even at the folded back portion as described above.

At the ends in the left-right direction (right end 3c, left end 3d), the nonwoven fabric 10 and the mask sheet 20 are folded in a pleated state and joined to the side sheet 32 in a pinched manner in the thickness direction. Here, by using the mask sheet 20, the joining strength of the portions folded in a pleated state can also be improved. Therefore, since the joining strength of this portion is improved, the side sheet 32 can also be omitted.

The welded portion 36 is a portion where each component is joined by heat welding, and a plurality of welded portions are provided in the mask body 3. In addition, a pattern 36a is provided in which a plurality of tiny welded portions 36 are arranged in a pattern at the lower left portion of the mask body 3 of the present embodiment. The pattern 36a in the mask 1 of the present embodiment is a letter (abc) forming the Roman alphabet. By providing such a pattern 36a, the front and back sides (skin side, non-skin side) of the mask 1 can be easily identified, and the installation direction of the mask 1 can be prevented from being incorrectly. In particular, in the present embodiment, by using the mask sheet 20, the pattern 36a is easily conspicuous. In addition, the pattern 36a is not limited to that shown in the figure, and it is preferred that the front and back sides (skin side, non-skin side) of the mask 1 can be identified (left-right asymmetry). For example, it may be characters other than Roman letters, symbols, graphics, arrows, etc.

<Structure of the mask sheet 20> As described above, the mask body 3 of the present embodiment is mainly composed of two sheet components: a nonwoven fabric 10 containing heat-fused fibers and a mask sheet 20. The mask sheet 20 has a gauze 40 formed of cotton yarn or the like.

Assuming that the nonwoven fabric 10 and the gauze 40 are directly joined by heat fusion, since the gauze 40 does not contain heat fusion type fibers, the fibers in the nonwoven fabric 10 in a dissolved state will enter the fabric of the gauze 40 and be integrated. In this case, the joining strength between the nonwoven fabric 10 and the gauze 40 is weak and is easy to peel off. If the nonwoven fabric 10 and the gauze 40 are peeled off, the gauze 40 will come into contact with the wearer's mouth, and the wearer may have difficulty breathing. Here, in this embodiment, by using the mask sheet 20, the nonwoven fabric 10 and the gauze 40 are not easy to peel off.

FIG. 4 is a partially enlarged view of the mask sheet 20 viewed from the skin side, and FIG. 5 is a view showing the state where the mask sheet 20 is separated into the gauze 40 and the heat-fused fiber net 50. As shown in FIG. 4 and FIG. 5, the mask sheet 20 is a sheet member in which the gauze 40 and the fibers 51 (heat-fused fiber) of the heat-fused fiber net 50 are entangled with each other (the gauze 40 and the heat-fused fiber net 50 are entangled). The manufacturing method of the mask sheet 20 in which the gauze 40 and the heat-fused fiber net 50 are entangled with each other is described below.

As shown in FIG. 4 , the gauze cloth 40 is composed of a structured yarn 41 woven in a lattice shape. The structured yarn 41 has: a plurality of warp yarns 42 and a plurality of weft yarns 43 intersecting the warp yarns 42. The warp yarns 42 and the weft yarns 43 intersect with each other to form a plurality of woven holes 45 (through areas surrounded by the warp yarns 42 and the weft yarns 43) in the thickness direction. The structured yarn 41 of the gauze cloth 40 is a twisted yarn obtained by twisting a raw yarn composed of cotton yarn (cotton fiber). Among the materials of the raw yarn, in addition to cotton fibers, natural cellulose fibers such as hemp and pulp fibers, regenerated cellulose fibers such as rayon, and semi-synthetic cellulose fibers such as acetate are preferably used. The cotton yarn used in the raw yarn is preferably a yarn with a coarseness of 10 to 100 cotton count (length per unit weight, length/weight). In addition, the weave (weaving method) of the yarn cloth 40 is not limited to a lattice-shaped plain weave, and a known weave such as a twill, satin, or twill can be appropriately adopted.

The heat-fused fiber web 50 (heat-fused fiber layer) is a fiber aggregate formed by a known manufacturing method such as a spunbonding method of long fibers or a dry method of forming a web by combing short fibers in a certain direction by a carding machine, and is in a state before being formed into a nonwoven fabric. The fiber 51 of the heat-fused fiber web 50 is the heat-fused fiber that can be used as an example in the description of the nonwoven fabric 10. In addition, the heat-fused fiber web 50 is not limited to being formed by a carding method using a carding machine, and can also be formed by a method such as an airflow web forming method, a wet method, a spunbonding method, a melt-blowing method, etc.

The heat-fusion type fiber web 50 of the present embodiment is provided at least between the gauze 40 and the non-woven fabric 10 (see FIG. 6 ), and a part of the fiber 51 is entangled with the gauze 40. Thus, the non-woven fabric 10 and the heat-fusion type fiber web 50 including the heat-fusion type fiber are surely joined (fused) by heating, and since the fiber 51 of the heat-fusion type fiber web 50 is entangled with the gauze 40, the gauze 40 is not easily separated from the heat-fusion type fiber web 50. Therefore, the non-woven fabric 10 and the gauze 40 can be made not easily separated.

The fiber density of the heat-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 heat-fused fiber web 50 is, for example, 7 to 20 mm, and the fiber length of the heat-fused fiber web 50 is, for example, 1 to 100 mm. Furthermore, the fiber fineness of the heat-fused fiber web 50 is, for example, 0.1 to 6 dtex.

The fiber 51 of the heat-fusion type fiber net 50 of the present embodiment includes hydrophilic fiber and hydrophobic fiber. The hydrophobic fiber can be a polyester system including polyethylene terephthalate (PET), polypropylene (PP), a polyolefin system including polyethylene (PE), a composite fiber of a core-sheath structure composed of PP and PE, a side-by-side composite fiber, and the like. The hydrophilic fiber includes, for example, rayon, heat-fusion type fiber and composite fiber to which a hydrophilization treatment is applied. In addition, the hydrophilization treatment is to modify the fiber surface to hydrophilicity by applying a surfactant on the surface to reduce the contact angle of the fiber surface. At this time, the surfactant used preferably includes non-ionic surfactants such as hydrophilic silicone oil, anionic surfactants, cationic surfactants, and amphoteric surfactants.

By making the heat-fusible fiber web 50 contain hydrophilic fibers, moisture (exhalation and sweat of the wearer, etc.) can be absorbed, and the environment inside the mask (between the mask 1 and the wearer's face) can be kept comfortable. In addition, by making the heat-fusible fiber web 50 contain hydrophobic fibers, moisture can be dispersed to improve ventilation.

In addition, when the heat-fused fiber net 50 contains hydrophilic fibers and hydrophobic fibers, the mixing ratio of the hydrophilic fibers and the hydrophobic fibers is preferably greater than the weight of the hydrophilic fibers contained per unit volume. This makes it easier to disperse water and improves air permeability.

The method of entanglement and integration of the gauze 40 and the heat-fused fiber net 50 (the method of manufacturing the mask sheet 20) can use, for example, the well-known water flow entanglement method. In the process of manufacturing the liquid-permeable sheet by the water flow entanglement method, a continuous layered body in which a continuous fiber aggregate, which is a material of the gauze 40, is stacked on the upper surface (here, the non-skin side 40a) of the continuous grid-shaped fabric, is sprayed with high-pressure water from a plurality of nozzles arranged at intervals in a direction intersecting the conveying direction of the continuous layered body. That is, as shown in FIG. 5, the heat-fused fiber net 50 is superimposed on the gauze 40, and a high-pressure water flow is sprayed from the upper side (non-skin side) toward the lower side. In this way, the constituent fibers (fibers 51) of the heat-fused fiber net 50 and the structural yarn 41 of the gauze 40 can be entangled with each other and integrated. In addition, a pattern can be given to the integrated sheet by the pressure of water.

When water entanglement is performed, the continuous stacked body on which the heat-fused fiber mesh 50 continuous with the continuous gauze 40 is stacked is transported by a transport means composed of a metal mesh belt, and when a high-pressure water stream is sprayed from a nozzle toward the top of the continuous stacked body, the fibers 51 of the heat-fused fiber mesh 50 and the structural yarns 41 of the gauze 40 are entangled on the upper side, and the lower side facing the transport means is also entangled by the splashing water stream in contact with the transport means. Furthermore, according to the water entanglement method, by appropriately changing the structure of the mesh belt of the transport means, a mask sheet 20 having desired sheet properties such as thickness, quality, absorption speed, and sheet strength can be obtained.

FIG. 6 is a cross-sectional view taken along the line Y-Y in FIG. 4, and the nonwoven fabric 10 located on the non-skin side of the mask sheet 20 is indicated by a dotted line. Referring to FIG. 6, in the mask sheet 20, the fibers 51 of the heat-fused fiber web 50 are entangled with the gauze 40, and a portion of the fibers 51 entangled with the gauze 40 protrudes (extends) from the skin side 40b of the gauze 40. This makes it easy to join components (such as components including heat-fused fibers) to the skin side 40b of the gauze 40. For example, at the lower end 3b of the mask body 3, the folded nonwoven fabric 10 can be easily joined to the skin side of the mask sheet 20 (the skin side surface 40b of the gauze 40). Also, the joined portion with the ear hook 5 and the like can be strengthened.

Thus, the heat-fused fiber net 50 includes: a skin-side extension portion 52 provided on the skin-side side more closely than the skin-side surface 40b of the gauze 40, and a non-skin-side extension portion 53 provided on the non-skin-side side more closely than the non-skin-side surface 40a of the gauze 40. The non-skin-side extension portion 53 is a portion directly sprayed by the high-pressure water flow when formed by the water entanglement method. On the other hand, the skin-side extension portion 52 is a portion extending toward the mesh belt side, which is the conveying means, by passing through the lattice-shaped structural yarn 41 of the gauze 40 located below when sprayed by the high-pressure water flow and between the structural yarn 41.

In the mask sheet 20 of the present embodiment thus manufactured, among the fibers 51 intertwined with the gauze 40 in the heat-fused fiber web 50, the number of fibers 51 protruding from the skin-facing side 40b of the gauze 40 is smaller than the number of fibers 51 not protruding from the skin-facing side 40b. Thus, by reducing the number of fibers 51 protruding from the skin-facing side 40b of the gauze 40, the pricking sensation when the mask 1 is worn can be reduced, and the skin contact can be improved.

For example, a manufacturing method other than the water jet entanglement method may be used to make the number of fibers 51 protruding from the skin-side surface 40b of the gauze 40 among the fibers 51 entangled with the gauze 40 of the heat-fused fiber web 50 greater than the number of fibers 51 not protruding from the skin-side surface 40b. In this case, by increasing the number of fibers 51 protruding from the skin-side surface 40b of the gauze 40, the mutual entanglement on the side of the skin-side surface 40b can be strengthened, and the gauze 40 is less likely to be separated from the heat-fused fiber web 50. Therefore, the nonwoven fabric 10 and the gauze 40 are less likely to be separated.

As shown in Fig. 6, the fiber amount per unit area of the heat-fused fiber mesh 50 is preferably greater on the non-skin side 40a of the gauze 40 (non-skin side extension 53) than on the skin side 40b (skin side extension 52). Thus, good skin contact can be maintained and the bonding strength with the non-woven fabric 10 can be improved.

In Figure 6, if the thickness from the skin side surface 40b of the gauze 40 to the point 51a at which the skin side extension portion 52 extends most, is set as the maximum thickness D1 of the skin side extension portion 52, and the thickness from the non-skin side surface 40a of the gauze 40 to the point 51b at which the non-skin side extension portion 53 extends most, is set as the maximum thickness D2 of the non-skin side extension portion 53, the maximum thickness D2 of the non-skin side extension portion 53 is preferably greater than the maximum thickness D1 of the skin side extension portion 52. In this way, by making the maximum thickness D2 of the non-skin side extending portion 53 of the heat-fusible fiber web 50 larger, good skin contact can be maintained and the bonding strength with the non-woven fabric 10 can be improved.

Furthermore, the maximum thickness D1 and the maximum thickness D2 are the thickness of the appearance, and the thickness dimensions are preferably measured, for example, by first cutting the mask sheet 20 along the thickness direction of the heat-fused fiber web 50, and photographing the enlarged photograph of the cut surface using a digital microscope VHX-1000 manufactured by KEYENCE. Based on the enlarged photograph, the interval dimension (D1) from the skin side surface 40b of the gauze 40 to the point 51a where the skin side extension portion 52 extends most to the skin side is measured, and the interval dimension (D2) from the non-skin side surface 40a of the gauze 40 to the point 51b where the non-skin side extension portion 53 extends most to the non-skin side is measured. In this way, the thickness dimensions (maximum thickness D1 and maximum thickness D2) can be measured.

Table 1 shows the measurement results of the peel strength of the gauze 40 and the nonwoven fabric 10. Here, the peel strength between the gauze 40 and the nonwoven fabric 10 was measured for the case of the gauze 40 alone and the case of entangled with the heat-fused fiber web 50 in the gauze 40 (the amount of heat-fused fiber is different in two types). In addition, the peel strength was measured by clamping the sample (sample width 25mm) on the chuck of the load detector made by SHIMADZU 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 peeling strength of the heat-fused fiber web 50 entangled in the gauze 40 is higher than the peeling strength of the gauze 40 alone. Moreover, the greater the amount of heat-fused fiber, the higher the peeling strength. Thus, it can be confirmed that by entanglement of the heat-fused fiber web 50 in the gauze 40 (making 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 comprises: a nonwoven fabric 10 including heat-fusible fibers, and a mask sheet 20 joined to the nonwoven fabric 10. The mask sheet 20 comprises: a gauze 40 disposed closer to the skin than the nonwoven fabric 10, and a heat-fusible fiber net 50 disposed at least between the gauze 40 and the nonwoven fabric 10, wherein a portion of the fibers 51 (heat-fusible fibers) of the heat-fusible fiber net 50 is entangled with the gauze 40.

Thus, the nonwoven fabric 10 and the heat-fusible fibers of the heat-fusible fiber web 50 can be reliably joined (heat-fused), and since the fibers 51 of the heat-fusible fiber web 50 are entangled with the gauze 40, it is difficult for the gauze 40 to be separated from the heat-fusible fiber web 50. Therefore, it is possible to make the nonwoven fabric 10 and the gauze 40 difficult to be separated.

===Other implementation examples=== Although the implementation methods of the present invention are described above, the above implementation methods are only for easy understanding of the present invention and do not limit the interpretation of the present invention. Moreover, the present invention can be changed and improved as long as it does not deviate from its purpose, and the present invention of course also includes its equivalents. For example, the possible variations shown below.

In the above-mentioned embodiment, the mask 1 (mask body 3) is a pleated type, but it is not limited to this. For example, it can also be a flat type, a three-dimensional type, a cup type, etc. However, as described above, by having a layer of a heat-fused fiber mesh 50 on the skin-facing side 40b of the gauze 40 and the non-skin-facing side 40a, the surfaces of the mask sheet 20 (the skin-facing side 40b of the gauze 40) in a folded state can be easily joined to each other. Therefore, the pleated type has a better effect.

In the above-mentioned embodiment, the mask body 3 is 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.) can also be further laminated.

1: Mask 3: Mask body 3a: Upper end 3b: Lower end 3c: Right end 3d: Left end 5: Ear hook 10: Nonwoven fabric 20: Mask sheet 30: Pleated section 31: Retaining member 32: Side sheet 33: Notch section 34: Nose cover 35: Folding section 35a: Mountain fold section 35b: Valley fold section 36: Welding section 36 a: pattern 40: yarn 40a: non-skin side 40b: skin side 41: structured yarn 42: warp yarn 43: weft yarn 45: weave 50: thermally fused fiber mesh (thermal fused fiber layer) 51: fiber 51a: dot 51b: dot 52: skin side extension 53: non-skin side extension D1, D2: maximum thickness

[Figure 1] A top view of the mask 1 as viewed from the non-skin side. [Figure 2] A top view of the mask 1 as viewed from the skin side. [Figure 3] A cross-sectional view along the X-X line in Figure 1. [Figure 4] A partially enlarged view of the mask sheet 20 as viewed from the skin side. [Figure 5] A view showing the state in which the mask sheet 20 is separated into the gauze 40 and the heat-fused fiber mesh 50. [Figure 6] A cross-sectional view along the Y-Y line in Figure 4.

10: Non-woven fabric

20: Sheets for masks

40: Gauze

40a: Non-skin side

40b: Side of skin

42: Warp

43:Weft yarn

50: Thermally fused fiber mesh (thermal fused fiber layer)

51: Fiber

51a: point

51b: point

52: Lateral extension of the skin

53: Non-skin lateral extension

Claims (9)

A mask sheet is formed by being joined to a nonwoven fabric containing heat-fusible fibers, and comprises: a gauze fabric arranged closer to the skin than the nonwoven fabric, and a heat-fusible fiber layer at least provided between the gauze fabric and the nonwoven fabric, wherein a part of the fibers of the heat-fusible fiber layer are entangled with the gauze fabric. , at least a portion of the fibers of the aforementioned heat-fused fiber layer entangled with the aforementioned gauze protrudes from the skin side of the aforementioned gauze, and among the fibers of the aforementioned heat-fused fiber layer entangled with the aforementioned gauze, the number of fibers protruding from the aforementioned skin side of the aforementioned gauze is less than the number of fibers not protruding from the aforementioned skin side. A mask sheet is formed by being joined to a nonwoven fabric containing heat-fusible fibers, and comprises: a gauze fabric arranged closer to the skin side than the nonwoven fabric, and a heat-fusible fiber layer at least provided between the gauze fabric and the nonwoven fabric, a part of the fibers of the heat-fusible fiber layer being entangled with the gauze fabric, at least a part of the fibers of the heat-fusible fiber layer entangled with the gauze fabric protruding from the skin side of the gauze fabric, and the fiber amount per unit area of the heat-fusible fiber layer being greater on the non-skin side of the gauze fabric than on the skin side. A mask sheet is formed by being joined to a nonwoven fabric containing heat-fusible fibers, and comprises: a gauze fabric arranged closer to the skin than the nonwoven fabric, and a heat-fusible fiber layer at least arranged between the gauze fabric and the nonwoven fabric, wherein a portion of the fibers of the heat-fusible fiber layer are entangled with the gauze fabric, and the heat-fusible fiber layer is intertwined with the gauze fabric. At least a portion of the entangled fibers protrude from the skin side of the gauze, and the thermally fused fiber layer includes: a skin side protruding portion disposed closer to the skin side than the gauze, and a non-skin side protruding portion disposed closer to the non-skin side than the gauze, and the maximum thickness of the non-skin side protruding portion is greater than the maximum thickness of the skin side portion. A mask sheet as claimed in any one of claims 1 to 3, wherein the mask is pleated, the skin-facing sides of the gauze are folded so as to overlap each other, and the ends in the width direction are joined. As in any one of claims 1 to 3, the mask sheet, wherein the thermally fused fiber layer comprises hydrophilic fibers and hydrophobic fibers. As in any one of claim 1 to 3, the nonwoven fabric further comprises non-thermal fusion-bonding fibers. A mask comprising: a nonwoven fabric including heat-fused fibers, a gauze fabric disposed on a skin-side relative to the nonwoven fabric, and a heat-fused fiber layer disposed at least between the gauze fabric and the nonwoven fabric and joined to the nonwoven fabric, wherein a portion of the fibers of the heat-fused fiber layer are entangled with the gauze fabric, and a front At least a portion of the fibers of the heat-fused fiber layer entangled with the gauze protrude from the skin side of the gauze, and among the fibers of the heat-fused fiber layer entangled with the gauze, the number of fibers protruding from the skin side of the gauze is less than the number of fibers not protruding from the skin side. A mask comprising: a nonwoven fabric including heat-fusible fibers, a gauze fabric disposed on a skin-side relative to the nonwoven fabric, and a heat-fusible fiber layer disposed at least between the gauze fabric and the nonwoven fabric and joined to the nonwoven fabric, wherein a portion of the fibers of the heat-fusible fiber layer are entangled with the gauze fabric, and at least a portion of the fibers of the heat-fusible fiber layer entangled with the gauze fabric protrude from the skin-side surface of the gauze fabric, and the fiber amount per unit area of the heat-fusible fiber layer is greater on the non-skin-side surface of the gauze fabric than on the skin-side surface. A mask comprising: a nonwoven fabric including heat-fused fibers, a gauze fabric disposed closer to the skin than the nonwoven fabric, and a heat-fused fiber layer disposed at least between the gauze fabric and the nonwoven fabric and joined to the nonwoven fabric, wherein a portion of the fibers of the heat-fused fiber layer are entangled with the gauze fabric, and the fibers of the heat-fused fiber layer are entangled with the gauze fabric. At least a portion of the entangled fibers protrude from the skin side of the gauze, and the thermally fused fiber layer includes: a skin-side extending portion located closer to the skin side than the gauze, and a non-skin-side extending portion located closer to the non-skin side than the gauze, and the maximum thickness of the non-skin-side extending portion is greater than the maximum thickness of the skin-side portion.

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