JP2022183829A - mask - Google Patents

Abstract

To provide a mask in which pleats are easily opened when worn.SOLUTION: A mask being a laminate of a plurality of sheets includes: a plurality of pleat-like folds parallel to a longitudinal direction of the laminate; and bonding parts in which a plurality of bonding rows which intermittently bond the laminate of the plurality of sheets by a bonding area is provided on both ends of the mask in the longitudinal direction. The bonding part has a non-bonding area in which at least a non-skin face side on a mask center side in the bonding rows constituting the bonding part is not bonded in a part in which the pleat-like fold opens in a width direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to masks.

Adhesive lines are generally attached to the longitudinal ends of the sanitary mask by heat welding or the like in order to prevent the sheets constituting the mask from separating. On the other hand, a technique has been proposed in which a continuous welding pattern is applied instead of this adhesive line to improve the aesthetics of the mask (Patent Document 1).

JP 2015-65995 A

In Patent Literature 1, when the welding pattern is applied to the longitudinal end portion of the mask having pleats, the welding pattern is applied across the folds of the pleats. The welded pattern certainly improves the aesthetics, but if the welded pattern is applied across the folds of the pleats, the pleats are less likely to spread.

In order to solve the above-mentioned problems, in the present invention, a plurality of welding rows are provided to avoid the creases of the pleats to attach the adhesion regions, and the welding rows inside the mask are provided with adhesion regions at positions where the pleat folds open. No mask provided.

Specifically, the present invention provides a mask that is a laminate of a plurality of sheets, wherein a plurality of pleated creases are provided in parallel with the longitudinal direction of the laminate, and the laminate of the plurality of sheets is formed by an adhesive region. a bonding portion having a plurality of intermittently bonded bonding rows provided at both ends in the longitudinal direction of the mask; The mask has a non-adhesion region where at least the non-skin surface side of the mask central side of the constituent adhesion rows is not adhered.

At both ends of the mask in the longitudinal direction, the adhesive areas of the adhesive rows on the central side of the mask may be attached symmetrically to each other.

The adhesive region may be a welded pattern formed by welding, and the adhesive row may be formed as a welded row by intermittently applying the welded pattern.

The weld pattern is an aesthetically pleasing and conceptually relevant shape, and in portions not associated with the pleated folds, the weld pattern welds only contour lines of the shape and is associated with the pleated folds. In sections, the weld pattern may be welded to fill the shape.

The welding pattern has an aesthetically pleasing and conceptually relevant shape, and the pattern in the portion where the width direction ends of the pleat folds are welded is larger than the portion where the pleat folds are not glued. good.

In addition to the welding pattern, the welding row may further include a spot-like welding portion that is smaller than the welding pattern.

In the portion where the pleat-shaped folds are welded, the number of the spot-like welded portions may be smaller than in the portion where the pleat-shaped folds are not welded.

The ear strap attachment portions at the four corners of the mask may be provided with the dotted welded portions without the welded pattern.

When a welding pattern is applied to one welding row, the welding pattern does not have to be applied to the same positions in the width direction of adjacent welding rows.

When a welding pattern is applied to one of the welding rows, at least one of the size, shape, and direction of the welding pattern applied to a widthwise vicinity position of an adjacent welding row may be changed.

In the weld row, at least one of the size, shape and direction of weld patterns adjacent in the width direction may be different.

One layer of the plurality of sheets may be provided with a pleat release state maintaining layer that facilitates maintaining the pleat-shaped creases in an open state.

A nonwoven fabric formed of long fibers may be used for any one of the plurality of sheets.

A nonwoven fabric having a fiber orientation that intersects the extending direction of the pleated folds may be used for any one of the plurality of sheets.

According to the present invention, it is possible to realize a mask that is excellent in aesthetics and comfortable to wear, in which the pleats are easy to spread while maintaining the function of preventing the separation of the sheet.

FIG. 1 is an external perspective view of a mask according to an embodiment. FIG. 2 is a plan view of a mask body portion according to the embodiment. FIG. 3 is a diagram showing a wearing state of the mask according to the embodiment. FIG. 4 is a diagram showing the structure of the mask body portion provided with the pleat release state maintaining layer. FIG. 5 is a diagram showing an example of the pleat release state maintaining layer. FIG. 6 is a diagram showing the directional tensile strength of a spunbond nonwoven fabric, which is one form of a sheet.

Masks according to embodiments of the present invention will be described below with reference to the drawings. The configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

FIG. 1 is an external perspective view of a mask according to an embodiment. As shown in FIG. 1, the mask 1 has a mask body 2, ear straps 3 and 4, side portions 5 and 6, and a nose fitter 7. As shown in FIG. The mask main body 2 has a substantially rectangular shape, is formed of a sheet-like breathable material, and has a size capable of covering the wearer's mouth and nose. The ear straps 3 and 4 are formed of a string-like stretchable material, and are attached to the left and right sides of the mask body 2 by joining the ends at the side portions 5 and 6 located on both sides of the mask body 2 . Each forms an annular ring.

The mask body 2 is composed of various sheets such as nonwoven fabric having air permeability and thermoplasticity, and is a laminate of multiple sheets. Each sheet of the plurality of sheets may have a respective functionality. When the mask body 2 is a laminate of three-layer sheets, the skin-side sheet is made of a nonwoven fabric that feels good on the skin, the intermediate sheet is made of a nonwoven fabric that has a high filter performance for absorbing foreign matter, and the surface-side sheet is made of durable fabric. It may be made of non-woven fabric with high durability and a design.

The plurality of sheets are appropriately joined to each other at the top, bottom, left, and right edges. The mask main body 2 has a plurality of folds that are parallel to the long side direction of the mask main body 2 and that can form a pleated (accordion-like) three-dimensional shape. Such creases are maintained in shape by intermittently welding patterns to both left and right ends to form side portions 5 and 6 when the mask body 2 is folded in a pleat shape. That is, the side portions 5 and 6 formed at the left and right ends prevent the folds from unfolding. The pleats of the main body 2 are widened to form a three-dimensional shape. By closing the pleats when the mask is not worn, the mask body 2 can be flat and not bulky.

The string-like stretchable material constituting the ear straps 3 and 4 is formed of, for example, a mixed woven belt of rubber thread and cotton, a mixed knitted net of resin filaments, or a stretchable nonwoven fabric. Both ends of such a string-like material are joined to the side portions 5 and 6 on the left and right sides of the mask body 2, respectively, so that one end of the material becomes a starting point and the other end of the material becomes a starting point. Loop-shaped ear straps 3 and 4 serving as end points are formed on both left and right sides of the mask body 2 .

The nose fitter 7 is a member fixed to the mask body 2 in the upper part of the mask body 2 with its longitudinal direction extending in the lateral direction of the mask body 2 . The nose fitter 7 may be fixed inside the laminate in a state of being sandwiched between the sheet-like breathable materials that constitute the mask body 2, or may be fixed to the surface of the mask body 2. good too. The nose fitter 7 is made of a plastically deformable material that has enough strength to be deformed into an appropriate shape by being pressed by the wearer's fingers, and that maintains its shape even when the pressure is released. By providing such a nose fitter 7 on the upper part of the mask body 2 , the wearer can close the gap between the nose and the mask body 2 .

A brand logo 8 is attached to the lower left portion of the mask body 2 where no pleats are provided. The brand logo 8 is an arbitrary character string or symbol indicating the manufacturer, distributor, product name, model number, etc. of the mask, and may be further patterned as shown in this figure. The user can easily determine the top and bottom of the mask by visually recognizing the brand logo. Of course, the brand logo 8 and the accompanying pattern may not be attached to the mask body 2, but may be attached to the packaging of the mask.

From the viewpoint of visibility and functionality, the side portions 5 and 6 and the brand logo 8 are preferably formed by a thermal welding technique such as ultrasonic welding. Other materials that make up the mask 1 may also be joined by ultrasonic welding, but for example, sewing with sewing thread or the like, adhesion with hot-melt adhesive or the like, heat sealing, or other various joining techniques may be applied. obtain.

FIG. 2 is a plan view of a mask body portion according to the embodiment. The side portion 5 is composed of a plurality of adhesive rows provided parallel to the width direction of the mask body 2 at the ends of the mask body 2 in the longitudinal direction. In this embodiment, the side portion 5 is composed of two adhesive rows 5A and 5B, and the side portion 6 is likewise composed of two adhesive rows 6A and 6B. The adhesive rows are arranged substantially evenly along the longitudinal ends of the mask body 2 . The number of bonding lines is not limited to two, but a sufficient bonding effect cannot be obtained with one line, and if there are too many, the bonding area becomes complicated and spoils the appearance. The bond row may be a weld row formed by a heat welding technique and the bond area may be a weld pattern formed by heat welding.

In this embodiment, the bonded rows are welded rows formed by a heat welding technique, and along the welded rows, the entire lengthwise end of the mask body 2 is a welded region formed by heat welding. A pattern M and points C are attached. The welding pattern M in this figure is a figure imitating a clover leaf having an aesthetic appearance, but it may be another simple figure, or other flowers or characters may be welded. Using such a pattern can be more aesthetically pleasing than simply using dashed weld lines. Moreover, it is not necessary to separately use a sheet member for fixing the side portions 5 and 6 .

The size of the weld pattern M need not be the same, but can vary depending on the strength required for the part. Masks are usually formed of multi-layered functional nonwoven fabric sheets of three or more layers. At the side portions 5 and 6, it is required to weld these multiple layers of non-woven fabric sheets to prevent the sheets from scattering due to external force applied during use of the mask. In the areas where no pleats exist, it is sufficient to weld only a plurality of layers of sheets, so the size of the welding pattern M can be minimized, and it is not necessary to be painted over.

However, since the mask is folded back multiple times at the portion where pleats (bellows-like folds) are present, the number of sheets to be welded may be up to 15 layers in a three-layer sheet mask. In this state, when the pleats are opened when wearing the mask, a large force is applied to the side portions 5 and 6, and the sheets are easily separated from each other. For this reason, in the conventional mask design, the strength of the bonding line is defined so as to correspond to the number of layers of the designed pleat portion.

Therefore, in the mask according to the present embodiment, in the pleat portion, in the portion where the number of layers of the nonwoven fabric sheet to be adhered is large, a large welding pattern M1 with an increased welding area is attached by filling, and the density of the welding patterns is increased. and weld strongly. In areas where there are no pleats on the top and bottom in the width direction, a welding pattern M3 that is small and consists only of contour lines can be applied. In addition, a small welding pattern M2 with an increased welding area can be applied to a portion where the number of non-woven fabric sheets to be welded is small, such as the central portion in the width direction of the mask.

In this way, by changing the size of the welding pattern and changing the welding area depending on the presence or absence of filling, the side portions 5 and 6 can maintain the necessary adhesive force in the portions where the adhesive force is required. can be done. In addition, the patterns M1, M2, and M3 are shapes that are conceptually related to clover leaves, and various accents can be applied to their sizes and interior fillings, so that the aesthetic appearance given to users and observers can be improved. can.

Furthermore, when forming a plant leaf pattern by welding as shown in this figure, a part of a particularly large welded pattern M1 expresses the petiole in addition to the leaf blade, and the petiole is always directed downward in design. can be By doing so, the user can use the petiole as a clue for judging the vertical direction of the mask.

A point C is a dot-like welded portion used to compensate for the lack of strength in the welded patterns M1, M2, and M3. If the patterns (clover leaves in this embodiment) are arranged, the patterns on each side overlap and impair the aesthetic appearance. If the point C is provided in the vicinity of , the strength can be maintained by a plurality of side portions and the appearance is not spoiled.

In the part where the pleats exist, it is necessary to weld a large amount of the sheet, and it is necessary to counteract the force of the pleats spreading when worn. Placement is desirable. In addition, since sufficient strength can be ensured by separate embossed bonding at the ear strap attaching portions where the ear straps 3 and 4 are welded, it is sufficient to attach the point C at the minimum.

When the welding pattern M is attached to any one of the welding rows 5A, 5B (or 6A, 6B), the adjacent welding row has the same position in the width direction with a bonded portion such as the welding pattern M. can not. By doing so, a large welding pattern M (for example, a welding pattern M1) that protrudes into the adjacent welding row can be attached as an accent to the side surface of the mask. In addition, even if such a large welding pattern is applied, it will not merge with the pattern applied in the adjacent welding row, and the appearance of the mask will not be spoiled.

When it is necessary to attach a large welding pattern to an arbitrary welding row and weld a sheet in a plurality of adjacent welding rows in terms of strength, at a position near the width direction of the large welding pattern M (for example, the welding pattern M1), A small welding pattern M (for example, a welding pattern M2) or a point C can be provided, the size and shape of which are adjusted (for example, if the welding pattern is a clover leaf, a four-leaf pattern or a three-leaf pattern). Also, the directions of the weld patterns M can be adjusted so that the weld patterns M in the vicinity do not overlap each other. By arranging the weld pattern M and the point C while making adjustments in this way, it is possible to realize a highly aesthetic weld row in which the size, shape, and direction of adjacent weld patterns are different as a result. Moreover, when each welding line 5A, 5B (or 6A, 6B) is viewed as the side portion 5 (or 6), the welding pattern is not interrupted on each side portion.

When each of the welding rows (5A, 5B, 6A, 6B) thus formed is viewed from the width direction, the adjacent welding pattern (that is, the welding pattern applied to the adjacent 5A, 5B and the adjacent The sizes, shapes, and directions of the welding patterns attached to 6A and 6B are different. By using welded rows having variations in pattern when viewed in the width direction (longitudinal direction), aesthetics can be improved. In addition, when each welding row has a meaning, it can be easily visually recognized and recognized. By doing so, it is possible to bring an appealing design to the adhesive row, which has been used only for the purpose of simply providing the functionality of preventing the separation of the sheet.

Furthermore, in this embodiment, the welding pattern M attached to each welding row of the side portions 5 and 6 of the mask is axisymmetrical with respect to the midline of the wearer's face. That is, each welding row attached to the longitudinal end of the mask has a pattern that is a left-right inversion of the welding pattern attached to the opposite end. When the welding pattern is applied in this manner, the positions where the functional sheets forming the pleats are fixed by the welding pattern become even on the left and right. In this way, when the user wears the mask, the pleats are evenly opened from both ends in the longitudinal direction. Therefore, it becomes easier to efficiently form a space around the mouth when worn.

FIG. 3 is a diagram showing a wearing state of the mask according to the embodiment. When the user wears the mask, the four corners of the mask are tightly attached to the skin due to the tension applied to the ear straps 3 and 4. - 特許庁On the other hand, the central portion of the mask in the lateral direction (that is, the pleated portion) is subjected to a force in the opposite direction, and the longitudinal ends of the mask with the pattern M do not adhere so strongly to the skin.

The welded pattern, which is large like the pattern M1 and filled in like the patterns M1 and M2, is harder than the skin surface sheet of the mask, and gives a sense of discomfort to the wearer when it is strongly adhered to the skin, but the mask according to the present embodiment. However, since such a welding pattern is applied to a portion that does not come into close contact with the skin, the feeling of discomfort given to the user is reduced. At the four corners of the mask, which are in close contact with the skin due to the elastic force of the ear straps 4 and 5, only the point C is attached, and in the vicinity thereof, the unpainted pattern M3 and the point C are added, so the welding pattern that is in close contact with the skin is at a minimum. can be reduced to Therefore, it is possible to provide a skin-friendly mask in which the appearance is improved by the pattern M, but sufficient strength is maintained for each part, and the welding pattern does not strongly adhere to the skin surface.

Further, in the present embodiment, among the welding rows (5A, 5B, 6A, 6B), the width direction end of the pleated portion where the number of layers of the nonwoven fabric sheet to be welded is large, is located closest to the center of the mask. A non-adhesive region having no weld pattern M or point C is provided in the welding rows (6B, 5B). When the ends of the pleats on the side of the mask central portion are fixed by welding, the fold lines of the pleats extend parallel to the skin surface while maintaining the position in the width direction at the upright portions. However, if the fold lines of the pleats are not fixed on the central side of the ends in the longitudinal direction of the mask due to the existence of the non-bonded regions as in this embodiment, the fold lines of the pleats tend to spread parallel to the skin surface. Further, it becomes easier to spread in the width direction. The non-bonded area can also be realized by not bonding at least the non-skin surface side of the plurality of sheets.

For example, the fold lines of the pleats tend to widen in the width direction with a large degree of freedom, like the pleat developed lines 9 in FIG. In addition, the width direction of the fold lines of the pleats is displaced from the ends in the longitudinal direction and widened, so that the pleats that have been widened at the time of wearing are less likely to return to their original shape. For this reason, it is possible to provide a mask that has an aesthetic appearance due to the welding pattern and that can easily maintain the space that can be created around the mouth.

Also, the advantage of attaching the welding pattern symmetrically from the midline of the face has been explained in FIG. can be axisymmetric from the midline of By doing so, it is possible to prevent the spread of the pleats from becoming uneven due to uneven welding patterns on the left and right sides.

Note that the thickness of the mask according to the present embodiment is 2 mm at the thickest part, and in order to bring about such an effect, the width of the region where the welding pattern M and the point C are not attached in the width direction is set to 115 mm or more in the width direction. It is desirable to

FIG. 4 is a diagram showing the structure of the mask body portion provided with the pleat release state maintaining layer. In this embodiment, the welding patterns of the ends 5 and 6 are attached so as not to interfere with the development of the pleats, thereby facilitating the opening and closing of the pleats. By providing the open state maintaining layer, the open state of the pleats can be easily maintained. In the example of this figure, the mask body 2 is constructed by laminating a surface sheet 10, a filter sheet 11, a pleated open shape maintaining sheet 12, and a skin sheet 13 from the non-skin side toward the skin side. .

The surface sheet 10 is a strong sheet that can withstand the external environment and friction to a certain extent, and is made of nonwoven fabric or the like. The filter sheet 11 is a sheet composed of a non-woven fabric made of very fine resin fibers charged with static electricity, and the charged fine fibers adsorb foreign matter. The pleated release shape maintaining sheet 12 is a sheet that facilitates maintaining the state in which the pleats are open, and secures a space around the wearer's mouth to facilitate breathing. The skin sheet 13 is made of a nonwoven fabric that is pleasant to the touch and does not cause discomfort even when worn for a long period of time.

FIG. 5 is a diagram showing an example of the pleat release state maintaining layer. As shown in FIG. 5, the shape-retaining sheet 12 has a rectangular shape before the folds are formed in the layered body of the mask body 2 . Note that the shape-retaining sheet 12 after the creases are formed also has a rectangular shape when the pleats are closed. However, the length in the longitudinal direction of the shape-maintaining sheet 12 before the crease is formed is longer than the shape-maintaining sheet 12 after the pleat is formed because the sheet is not folded back in the longitudinal direction. In this figure, broken lines indicate positions of folds formed in the shape-retaining sheet 12 when the pleats of the laminated body of the mask body 2 are formed. On the other hand, the length in the horizontal direction of the shape-maintaining sheet 12 before the crease is formed is the same as the shape-maintaining sheet 12 after the crease is formed.

The configuration of the crease will be described. After the layered body of the mask body 2 is folded, each sheet 10 to 13 of the layered body has, for example, a valley-fold fold line VF1, a mountain-fold fold line MF1, and a fold line MF1 from above when the mask body 2 is viewed downward. A valley fold VF2 and a mountain fold MF2 are formed in this order. In this configuration, when the mask body 2 is viewed from the non-skin side of the wearer, the second and third fold lines MF1 and VF2 from the top are visible. The configuration of the folds provided in the layered body of the mask body 2 is not limited to the configuration shown in FIG. For example, the number of folds provided in the stack of mask bodies 2 may be greater or less than the number of folds in the configuration shown in FIG.

In the present embodiment, the shape-retaining sheet 12 has linear solidified portions 15 arranged at each of the four corners of the sheet 12 and extending obliquely. Of the four corners, the solidified portion 15 arranged in the upper left corner extends from the lower left side to the upper right side of the corner, and the solidified portion 15 arranged in the upper right corner extends to the upper left of the corner. It extends from the side to the lower right side. These solidified portions 15 also extend across the fold lines VF1, MF1. Furthermore, the solidified portion 15 located at the lower right corner extends from the upper right side to the lower left side of the corner, and the solidified portion 15 located at the lower left corner extends from the lower right side to the upper left side of the corner. extends to These solidified portions 15 also extend across the fold lines VF2, MF2.

The solidified portion 15 is obtained by softening or melting the nonwoven fabric, which is the material of the shape-retaining sheet 12, and solidifying it into a film. Since the solidified portion 15 is harder than the portion other than the solidified portion 15 where the non-woven fabric is not solidified, the laminate including the shape-retaining sheet 12 receives a force from the central portion of the mask body 2 that causes the pleats to expand. It is easy to bend along the solidified portion 15 when it is pressed. Therefore, once the laminate is bent at the end of the solidified portion 15 on the center side of the mask body 2 (an example of the "bent portion" in the present disclosure), the laminate is difficult to bend back. In other words, it can be said that the solidified portion 15 can prevent the expanded pleats from returning to their original shape. Thereby, the laminated body can be maintained in a bent state. As a result, when the wearer wearing the mask 1 spreads the pleats and determines the three-dimensional shape of the mask body 2, the three-dimensional shape of the dome-shaped swollen portion formed on the mask body 2 can be maintained. Although the solidified portion 15 is relatively hard, it is also flexible, so that even after the laminated body of the mask body 2 is folded back, it is not cut, and the function of maintaining the three-dimensional shape can be maintained.

Moreover, since the solidified portions 15 extend so as to intersect the folds VF1, MF1, VF2, MF2, when the pleats are unfolded, the laminate is bent along a direction different from the direction in which the folds extend. Become. For example, if the solidified portion 15 extends parallel to the crease without crossing it, the laminate will be bent along the same direction as the extension of the crease. However, in this case, although the bending direction is opposite to the bending direction, it is parallel to the bending direction, so that the bending force tends to be applied. In the present embodiment, since the solidified portion 15 functions as a "fold", the laminate is bent along a direction different from the extending direction of the folds VF1, MF1, VF2, MF2, so that the force to bend back It becomes difficult to receive the bending, and the folded state of the laminated body can be further maintained.

In addition, the dome-shaped portion of the mask body 2 formed by the arrangement of the solidified portion 15 described above covers the wearer's nose root to the lower jaw in the vertical direction and from the left cheek to the left cheek in the lateral direction. part. Therefore, this arrangement can form a three-dimensional shape suitable for the wearer. In particular, depending on the positions of the upper ends UE of the solidified portions 15 at the upper left corner and the upper right corner, it is possible to form a dome-shaped swollen portion originating from the root of the nose of the wearer.

Furthermore, the positions of the lower end LE of the solidified portion 15 at the upper left corner and the upper end UE of the solidified portion 15 at the lower left corner, the lower end LE of the solidified portion 15 at the upper right corner, And due to the position of the upper end UE of the solidified portion 15 at the lower right corner, even if the side portions 5 and 6 of the mask body 2 warp toward the non-skin side of the wearer when the pleats are spread, the solidified portion 15 Since it does not warp, it is possible to maintain the function of the solidified portion 15 that makes it difficult for the laminate to bend back.

Furthermore, although the solidified portion 15 is relatively hard, the shape-retaining sheet 12 having the solidified portion 15 is the skin sheet 13 on the wearer's skin side and the outer layer sheet 10 on the non-skin side in the laminate of the mask body 2 . is placed between Therefore, the shape-retaining sheet 12 is not exposed on the wearer's skin side, and the relatively hard solidified portion 15 does not come into direct contact with the wearer's skin. Therefore, there is no need to provide a covering member for avoiding direct contact of the hard portion with the wearer's skin. In addition, since the shape-retaining sheet 12 is not exposed to the non-skin side of the wearer, the appearance of the mask 1 when viewed from the non-skin side is not spoiled.

Such a solidified portion 15 can be formed by softening and solidifying a predetermined portion of the nonwoven fabric sheet (the shape-retaining sheet 12 before the solidified portion 15 is formed) by heating or ultrasonic vibration. Also, the solidified portion 15 can take various forms. A round bracket-shaped weld line may be attached to the entire shape-maintaining sheet 12, or an auxiliary weld line may be attached separately. In the present embodiment, at the position where the pleats are opened in the width direction, the welded rows on the center side of the mask among the plurality of welded rows are not given a welding pattern, thereby facilitating the spread of the pleats and maintaining the widened state of the pleats. Since it is easy to maintain, it is possible to provide a mask that is highly aesthetic and comfortable to wear.

FIG. 6 is a diagram showing tensile strength in different directions of a spunbond nonwoven fabric, which is one form of sheet. Spunbonded nonwoven fabrics are made by melting resin chips, which are raw materials, to make threads, depositing them in a mesh, and bonding them into a sheet.

In addition, the spunbond nonwoven fabric is not a product in which fibers are completely randomly entangled, but machine direction and cross direction in the manufacturing process.
ions) have different tensile strengths. Here, long grain (MD) refers to the direction in which the formed sheet exits the machine (machine direction), and long grain (CD) refers to the direction perpendicular thereto (width direction). As a result of measuring the tensile strength of the nonwoven fabric for each type and for each basis weight, the inventor found that the longitudinal grain has about 2 to 4 times the tensile strength of the transverse grain. Such a sheet can be said to have fiber orientation in the long grain direction, and is easily folded in the cross grain direction.

In this embodiment, one of the sheets constituting the mask, particularly the skin sheet, is formed of a nonwoven fabric formed of long fibers such as spunbond, and the longitudinal direction of the nonwoven fabric is crossed with the extending direction of the folds of the pleats. direction. When the sheet arranged in this direction is folded and pleated, a stronger restoring force acts on the sheet, so that the pleats can be easily opened. Furthermore, when the wearer unfolds the pleats, the dome-shaped bulging portion formed on the mask body 2 resists the vertical force among the forces in various directions in which the pleats tend to fold back, It can be made difficult to bend back. For this reason, it becomes easier to form a space around the mouth when wearing the mask, and the comfort of the wearer is improved.

In addition, since the lateral grain direction of the sheet is parallel to the extending direction of the folds of the pleats, it is possible to realize a mask that easily conforms to the shape of the face.

It should be noted that a plurality of laminated sheets, including the pleated open shape maintaining sheet, may be arranged such that the longitudinal direction of the sheet intersects the extending direction of the folds of the pleats. In this way, the pleats intersecting the longitudinal grain direction of the plurality of sheets can be more easily opened and maintained in an open state, so that a space can be easily formed around the mouth. In addition, since the lateral grain direction of the sheet is aligned with the extending direction of the folds of the pleats, it is possible to realize a mask that is very easy to fit on the face.

Although the embodiment of the mask according to the present invention has been described above, the content of the present invention is not limited to the above embodiment. In the present embodiment described above, an example of using a long-fiber nonwoven fabric (spunbond nonwoven fabric) has been shown in order to facilitate the pleats to open and to maintain the open state. However, the difference in strength between the grain direction and the grain direction is not limited to spunbond nonwoven fabrics, but is a feature of nonwoven fabric sheets in general. Therefore, by setting the longitudinal grain direction of an arbitrary nonwoven fabric to the direction that intersects the extending direction of the folds of the pleats, the pleats are easy to open and difficult to close, forming a space around the mouth, and improving the comfort of the wearer. An improved mask can be provided.

The embodiments and application examples disclosed above can be combined.

1 Mask 2 Mask main body 3, 4 Ear straps 5, 6 Side parts 5A, 5B, 6A, 6B Welding row 7 Nose fitter M, M1, M2, M3 Welding pattern C point 8 brand logo 9 pleat development line 10 surface sheet 11 filter sheet 12 pleat release shape maintaining sheet 13 skin sheet 15 solidified portions VF1, MF1, VF2, MF2・・・Crease of mask body

Claims (14)

A mask that is a laminate of multiple sheets,
A plurality of pleated folds parallel to the longitudinal direction of the laminate;
a bonding portion in which a plurality of bonding lines for intermittently bonding the laminated body of the plurality of sheets by bonding regions are provided at both ends in the longitudinal direction of the mask;
provided with
The adhesive portion has a non-adhesive region where at least the non-skin surface side of the mask central side of the adhesive rows constituting the adhesive portion is not adhered at a location where the pleat-shaped fold opens in the width direction.
mask. At both ends in the longitudinal direction of the mask, the bonding regions of the bonding rows on the center side of the mask are attached symmetrically to each other,
A mask according to claim 1. The adhesive region is a welded pattern formed by welding,
The adhesive row is formed as a welded row by intermittently applying the welded pattern.
3. Mask according to claim 1 or 2. The weld pattern is an aesthetically pleasing and conceptually relevant shape,
In the portion not related to the pleat-shaped crease, the welding pattern welds only the outline of the shape,
In the portion related to the pleated fold, the welding pattern is welded so as to fill the shape.
4. A mask according to claim 3. The weld pattern is an aesthetically pleasing and conceptually relevant shape,
The pattern of the portion where the width direction ends of the pleat-shaped folds are welded is larger than the portion where the pleat-shaped folds are not adhered,
A mask according to claim 3 or 4. In addition to the welding pattern, the welding row further includes a spot-like welding portion smaller than the welding pattern,
A mask according to any one of claims 3-5. In the portion where the pleat-shaped folds are welded, the number of the dot-like welded portions is smaller than that in the portion where the pleat-shaped folds are not welded,
7. Mask according to claim 6. The ear strap attachment parts at the four corners of the mask are not attached with the welding pattern, but are attached with the point-like welding parts,
A mask according to claim 6 or 7. When a welding pattern is applied to one welding row, the welding pattern is not applied to the same position in the width direction of adjacent welding rows.
Mask according to any one of claims 3-8. When a welding pattern is applied to one of the welding rows, at least one of the size, shape, and direction of the welding pattern applied to a position near the width direction of an adjacent welding row is changed.
A mask according to any one of claims 3-9. At least one of the size, shape and direction of welding patterns adjacent in the width direction in the welding rows is different.
Mask according to claim 9 or 10. One layer of the plurality of sheets is provided with a pleated release state maintaining layer that facilitates maintaining the pleated folds in an open state,
A mask according to any one of claims 1-11. using a nonwoven fabric formed of long fibers for any one of the plurality of sheets,
A mask according to any one of claims 1-12. on any one of the plurality of sheets,
Using a nonwoven fabric having a fiber orientation that intersects the extending direction of the pleated folds,
A mask according to any one of claims 1-13.

Images