WO2017038210A1

WO2017038210A1 - Disposable mask

Info

Publication number: WO2017038210A1
Application number: PCT/JP2016/068216
Authority: WO
Inventors: 慶若杉; 柴田　彰; 龍一神山
Original assignee: ユニ・チャーム株式会社
Priority date: 2015-09-04
Filing date: 2016-06-20
Publication date: 2017-03-09
Also published as: CN108135299A; KR20180050678A; JP2017048486A; PH12018550023A1; CN108135299B; JP5917757B1

Abstract

Provided is a disposable mask capable of giving a neat impression by inhibiting deformation of both side edges of the mask body. In the disposable mask (10), a low rigidity region (14), which extends in the width direction (X), which has a predetermined width in the vertical direction (Y), and which has lower rigidity than other portions, is positioned in the section below a transversal center line (Q) equally dividing the dimension of the mask body (20) in the vertical direction (Y) into two.

Description

Disposable mask

The present disclosure relates to disposable masks.

Patent Document 1 discloses a mask body formed of a sheet made of a fiber non-woven fabric, a pair of ear hooks extending annularly from both side edges of the mask body, and a plurality of folds consisting of overlapping portions obtained by folding the sheet in the mask body. A disposable mask having a portion (pleat) is disclosed.

JP 2008-55035 (P2008-55035)

In the disposable mask disclosed in Patent Document 1, a notch is formed in the central portion in the vertical direction of the side edges of the mask body. Normally, when the ear hook is wound around the ear, a force is exerted on the mask body to deform the mask from the fixed end of the ear hook upward and downward, but the center portion is applied. Even if a force acts, it can be dispersed and absorbed by the incision to suppress deformation.

However, since the incision is located at the central portion of the mask body, the separation distance from the fixed end of the ear hook to the incision is relatively large, and the force is transmitted from the fixed end of the ear hook to the incision to disperse it. Can not be absorbed, and may cause deformation between the fixed end and the cut. In particular, in the ear hook portion, since the ear is positioned higher than the lower fixed end in the wearing state, the force to pull the ear obliquely upward with respect to the free portion of the ear hook portion is increased. Even if an area is provided to buffer those forces, both side edges deform before the force is transmitted. Further, both side edges and the lower end edge of the mask body extend in a straight shape, and even if the force for deforming the mask body can be dispersed or absorbed in the incision, the mask overhangs in the width direction from the face in front view It is not possible to give such a clear impression that the wearer's face looks small.

The present invention is an improvement of a conventional disposable mask, which can suppress deformation of the mask body, can provide a curved shape along the face shape, and can provide a clean impression. I have to.

In order to solve the above problems, the present invention relates to a disposable mask having a vertical direction and a width direction and including a mask body and a pair of ear hooks.

In the disposable mask according to the present invention, another portion extending in the width direction and having a predetermined width in the vertical direction below a transverse center line dividing the vertical dimension of the mask body into two equal parts. Low rigidity area with low rigidity is located compared to.

A high stiffness zone is located above and below the low stiffness zone and adjacent thereto, and the high stiffness zone is higher in stiffness than the low stiffness zone and lower than the transverse center line. Since the bending guiding means by the rigid area and the high rigidity area located adjacent to the upper and lower direction is located below the transverse center line, deformation due to the upward force from the lower fixing part of the ear hook part occurs Before that, the force can be dispersed and absorbed reliably in the low rigidity region.

The mask body has a ridge portion formed of a superimposed portion obtained by folding a sheet, the ridge portion extends over the entire area in the width direction of the mask body, and the high rigidity region is formed from the ridge portion Since the low rigidity region is formed of non-overlapping portions located between the ridges, high rigidity regions and low rigidity regions are formed not only on both side edges of the mask body but also in the entire width direction. Can. In addition, since the low rigidity region and the high rigidity region can be formed by bending the base material sheet into a pleated shape, the structure is different from a forming means such as disposing a separate member or partially changing the mass of the sheet. Is simple and can reduce the manufacturing cost.

The mass per unit area of the sheet in the high rigidity region is higher than the mass per unit area of the sheet in the low rigidity region. In such a case, it is possible to form the low rigidity area without folding in a pleated shape by manufacturing the part of the sheet base material that forms the low rigidity area to be smaller than the other parts. it can.

The low rigidity area, a first high rigidity area located above the low rigidity area, and a second high rigidity area located below the low rigidity area, and the correlation of their rigidity is the Second high rigidity area ≧ the first high rigidity area> the low rigidity area. In such a case, after the force directed upward from the lower fixing portion of the ear hook portion is sufficiently received in the second high rigidity region, it can be absorbed and dispersed in the low rigidity region. In addition, when the rigidity of the first and second high rigidity areas is different from each other, the low rigidity area located therebetween can be more easily bent.

Since the dimension in the vertical direction of the high rigidity region is 6 to 12 mm, and the dimension in the vertical direction of the low rigidity region is 1 to 7 mm, the low rigidity region functions as a bending induction portion of both side edge portions of the mask main body can do.

Since the bending guiding means is located on both sides of the low rigidity area, the force applied to the both side edges of the mask main body in the low rigidity area can be absorbed and dispersed to be more surely bent.

The vertically extending seal area, which is formed of a plurality of joints, is disposed on both sides of the mask body, and the bending induction means is formed from a non-seal area where the joints are not disposed. Since it is formed, the rigidity in the low rigidity region is further reduced and can be reliably bent.

According to the disposable mask according to one or more embodiments of the present invention, the force to deform the mask body can be dispersed and absorbed in the low rigidity region in the wearing state, so that both side edges of the mask body Can be restrained from being separated from the face. In addition, the entire mask body is along the face line, which can give a clear impression in front view.

The drawings illustrate specific embodiments of the present invention and include not only the essential features of the invention, but also optional and preferred embodiments.
The top view seen from the front of the disposable mask concerning the present invention. The perspective sectional view which cut | disconnected along the II-II line of FIG. 1, and looked at the one side of the mask from the outer surface. The figure which looked at the cut surface of FIG. 2 from the side. The side view of the mask in a wearing condition. The elements on larger scale of FIG. FIG. 6 is a cross-sectional view taken along the line VI-VI shown in FIG. 5; The top view seen from the front of the mask in an example of a modification. Sectional drawing similar to FIG. 6 of the mask in an example of a modification. The front view of the mask in a wearing condition. Histogram for prior evaluation of the small face effect. Graph about the main evaluation of the small face effect.

The following embodiments relate to the single-use mask shown in FIGS. 1-11, and include not only the essential configuration of the invention, but also optional and preferred configurations.

1 and 2, the mask 10 shown as an example of the disposable mask of the present invention has a vertical direction Y and a width direction X, and has a skin opposing surface and a non-skin opposing surface opposed thereto, and the vertical direction Y And a mask main body 20 and a pair of annular ear hooks 30 extending from both

side edges

20 c and 20 d of the mask main body 20.

The mask body 20 is formed of a base sheet 21 made of a fibrous non-woven fabric, and has an upper end edge 20a extending straight in the width direction X and a lower end edge 20b extending in the width direction X with a slight convex curve.

Side edges

20c and 20d extending in the vertical direction Y are provided between the upper and

lower ends

20a and 20b. The lower end edge 20b has a central portion 19a extending straight in the width direction X, and curved side

curved portions

19b and 19c positioned on both sides of the central portion 19a. The mask body 20 is positioned between the upper and lower end portions at which the upper and

lower fixing portions

34A and 34B for fixing the both

ends

31A and 31B of the pair of ear hooks 30 are located and the upper and lower end portions in the vertical direction Y And an opposite mouth covering (intermediate part) 24. Furthermore, the mask body 20 has curved corners 27 where the upper and

lower edges

20a, 20b and the

side edges

20c, 20d intersect. The corner 27 not having a pointed shape but having a curved shape does not cause irritation even when the wearer's face touches the corner 27.

The mask main body 20 has both side edge portions 18 located on the outer side in the width direction X from the upper and

lower fixing portions

34A and 34B of the ear hooking portion 30, and a jaw portion 23 extending downward than the lower end of the lower fixing portion 34B. In the worn state, the jaws 23 are positioned opposite to the jaws of the wearer and have an outer shape that protrudes downward from the mouth covering 24.

The dimensions (length dimensions of both

side edges

20c and 20d) W1 of the mask main body 20 (mask 10) in the vertical direction Y are 60 to 100 mm, and the dimensions in the width direction X (length dimensions of upper and

lower edges

20a and 20b) L1 are , 140-180 mm. When the dimension W1 in the vertical direction Y of the mask body 20 is 60 mm or less, the jaw of the standard size of the adult wearer can not be covered sufficiently, while the dimension W1 is larger than 100 mm In this case, the lower end of the mask body 20 may extend downward from the jaws, which may give an impression that the mask 10 is longer than it actually is in a front view.

The base sheet 21 which forms the mask main body 20 is comprised from the inner-layer sheet 25 located in the skin opposing surface side, and the outer-layer sheet 26 located in the non-skin opposing surface side. The inner layer sheet 25 and the outer layer sheet 26 are bonded to each other by an outer peripheral seal area 40 intermittently extending along the outer peripheral edge of the mask body 20. The outer peripheral seal area 40 is formed of a plurality of joint portions 41 arranged at predetermined intervals in the extending direction. The outer peripheral seal area 40 intermittently extends in the width direction X along the lower end edge 20 b and an upper seal area 42 formed of two lines intermittently extending in the width direction X along the upper edge 20 a of the mask body 20. It has a lower seal area 43 and a side seal area 44 intermittently extending in the vertical direction Y along the

side edges

20c and 20d.

The inner layer sheet 25 and the outer layer sheet 26 are, for example, air-permeable fibrous nonwoven sheets having a mass of 10 to 40 g / m ² and containing heat fusible fibers, and are meltblown fibrous nonwoven fabrics, spunbonded fibrous nonwoven fabrics, SMS fibrous nonwoven fabrics, In addition to various known fiber non-woven fabrics such as an air through fiber non-woven fabric, it can be formed from a sheet material having good touch and breathability such as woven fabric, gauze, cotton cloth and the like. Although not shown, a filter function of fine particles and / or an intermediate sheet containing an aromatic agent and an antibacterial agent may be interposed between the inner and

outer layer sheets

25 and 26. The ear hooking portion 30 is preferably elastically stretchable, and is formed of a known material such as a non-woven fabric, a woven fabric, a plastic film, a rubber band or the like.

The outer peripheral seal area 40 is a welding seal line for welding the inner layer sheet 25 and the outer layer sheet 26 to each other at a plurality of intermittently arranged joints 41, and both

sheets

25 and 26 are bonded only in the outer peripheral seal area 40. And are not joined to one another in other parts. Therefore, the entire mask 10 is excellent in flexibility and air permeability as compared to the case where the entire inner surfaces of both

sheets

25 and 26 are bonded to each other.

Referring to FIG. 2, the joint portion 41 of the outer peripheral seal area 40 has a substantially rectangular shape defined by a pair of short sides and a pair of long sides, and in the upper seal area 42 and the lower seal area 43. The joint portion 41 is disposed such that the long side extends in the width direction X, and two seal lines extending in the vertical direction Y are formed. Further, the separation dimension in the vertical direction Y between the seal lines of the upper seal area 42 is larger than the separation dimension in the vertical direction Y between the seal lines of the lower seal area 43. The side seal area 44 is below the ear hooks 30 in addition to the plurality of outer joints 41A intermittently arranged to form a line extending in the vertical direction Y along the side edges 20c and 20d. It has a plurality of inner joint portions 41B located above the fixing portion 34B.

Referring to FIG. 2, an elastic strip (nose fit) 60 extending in the width direction X is disposed between the seal lines of the upper seal area 42. The elastic strip 60 is interposed between the inner layer sheet 25 and the outer layer sheet 26. Specifically, the elastic strip 60 is held in a cylindrical space formed between two seal lines forming the upper seal area 42. It is fixed. A bonding portion 41 for restricting the movement of the elastic strip 60 in the width direction X is disposed outside the width direction of both ends of the elastic strip 60.

The upper and lower end edges of the inner layer sheet 25 extend outward in the vertical direction Y more than the lower end edge of the outer layer sheet 26, and the vertically extending

portions

25a and 25b are bent inward in the vertical direction Y. The upper seal area 42 and the lower seal area 43 are fixed to the non-facing side of the outer layer sheet 26. Further, the lower end edge 20b of the mask main body 20 has a shape gently curved downward as the lower extending portion 25b is bent in a curved shape. The curved lower edge 20b and the curved corner 27 of the mask body 20 combine to make the mask 10 have a generally rounded appearance.

The ear hooking portion 30 has upper and

lower ends

31A and 31B located at the upper end and lower end of the mask main body 20, and a free portion 32 annularly extending between the upper and

lower ends

31A and 31B. The upper end 31A is fixed to the upper end portion of the mask main body 20 at the upper fixing portion 34A, and the lower end 31B is fixed to the lower end portion of the mask main body 20 at the lower fixing portion 34B. The upper and

lower fixing portions

34A and 34B are mesh-like embossed patterns and have a rectangular shape which is larger than the upper and

lower ends

31A and 31B, and the upper and

lower ends

31A and 31B are welded or adhered to the mask body 20. The upper and

lower ends

31A, 31B have the required peel strength with respect to the mask main body 20 by the upper and lower fixed

portions

34A, 34B being larger than the outer shape of the upper and

lower ends

31A, 31B. Even if the force to peel it off acts on it, it does not peel easily. Both ends 31A, 31B of the ear hooking portion 30 are fixed to the non-skin facing surface of the mask main body 20 by the upper and

lower fixing portions

34A, 34B. By fixing both

ends

31A and 31B of the ear hooking portion 30 to the non-skin facing surface of the mask main body 20, both ends 31A and 31B of the ear hooking portion 30 press the mask main body 20 against the face in the wearing state. The adhesion of the mask body 20 can be improved.

Bonding portions 41 forming upper and

lower seal areas

42 and 43 are disposed to overlap with portions of the upper and

lower fixing portions

34A and 34B. In such overlapping portions, not only the welded portions of the sheets are concentrated to increase the joint strength, but also the rigidity is relatively high and there is a possibility that the skin may be strongly stimulated if it touches the skin. Since the corner 27 where the 43 is positioned has a rounded shape, there is no possibility that the skin will be strongly stimulated even if it touches the skin.

The mouth covering portion 24 of the mask main body 20 has a plurality of ridges 28 extending in the width direction X and formed by bending the base sheet 21 in a pleated shape. The ridges 28 are, in order from the top, the first to third ridges 28A to 28C that are convex upward on the non-skin facing surface side of the mask main body 20, and a convex that protrudes downward below the third ridge 28C. And 4) ridge portion 28D. The base sheet 21 is bent into a cross-sectional shape of Ω at the third ridge portion 28C and the fourth ridge portion 28D. The mouth covering portion 24 is subjected to such pleating to fold the base material sheet 21 and form a plurality of highly rigid regions (overlapping portions) 13A and 13B, and a third ridge portion 28A. And the fourth ridge portion 28D, the low rigidity region (non-overlapping portion) 14 having lower rigidity than the

high rigidity regions

13A and 13B having a single-layer structure in which the base sheet 21 is not folded up Have. Here, "the rigidity of the

high rigidity area

13A, 13B is higher than that of the low rigidity area 14" means that the

high rigidity area

13A, 13B is higher than the low rigidity area 14 at least in bending rigidity in the vertical direction Y. Means

In the present invention, the

high rigidity regions

13A and 13B and the low rigidity region 14 are formed by the overlapping portion and the non-overlapping portion of the base sheet 21, but without bending the base sheet 21 Both

areas

13A, 13B and 14 may be formed by manufacturing so that the mass per unit area (area per unit area) of the sheet is smaller than the other parts. Alternatively, the two

regions

13A, 13B, 14 may be formed by providing separate sheet members and / or an adhesive or the like with only the

high rigidity regions

13A, 13B. Moreover, the folding aspect of the base material sheet 21 is not limited to the example of illustration, For example, all the collar parts 28 may face upwards or downwards, The part which forms the bending induction means 15 of a postscript mentioned later May be folded so as to have various known cross-sectional shapes instead of the Ω shape.

In the mouth covering portion 24, the base sheet 21 is folded in a pleated shape, whereby

high rigidity areas

13A and 13B formed by folding the base sheet 21 are located in portions other than the low rigidity area 14. . Further, in the mouth covering portion 24, the base sheet 21 is bent to a cross-section Ω shape below the transverse center line Q so that the low rigidity region 14 and the position above the low rigidity region 14 are adjacently located. And a second high rigidity region 13B located below and adjacent to the lower rigidity region 14 of the first high rigidity region 13A. In the manufacturing process, a slight single layer portion (about 0.1 to 0.5 mm) formed unintentionally by the applicant between the

ridges

28A and 28B does not become the low rigidity region 14.

Referring to FIG. 3, the dimensions in the vertical direction Y of the respective

high rigidity regions

13A and 13B are substantially the same, and for example, the dimensions in the vertical direction Y of the first high rigidity region 13A (the top and bottom of the second high rigidity region 13B The dimension in the direction Y is also the same) W3 is 6 to 12 mm. On the other hand, the dimension W4 in the vertical direction Y of the low rigidity region 14 is 1 to 7 mm. If the dimension W4 in the vertical direction Y of the low stiffness region 14 is less than 1 mm, the low stiffness region 14 can not function as a base point for inducing bending, and deformation occurs in part of the

high stiffness regions

13A and 13B. There is a risk of On the other hand, when the dimension W4 in the vertical direction Y of the low rigidity region 14 exceeds 7 mm, the size becomes relatively large, and a plurality of bending may be performed in the low rigidity region 14 to form a distorted shape. is there.

Referring again to FIG. 2, the separation dimension (the maximum dimension W2 in the vertical direction Y of the jaw portion 23) of the lower end (same as the boundary M) of the face facing portion 22 and the central portion 19a is 8 to It is 14 mm. By having the jaws 23 have such a maximum dimension W2, the entire jaw of the wearer can be covered. Further, the separation dimension in the vertical direction between the upper seal region 42 and the upper end edge 20a forming the outer peripheral seal region 40, and the separation dimension in the width direction X between the side seal region 44 and both side edges 20c and 20d are 2 to 7 mm. Of the outer peripheral seal area 40 located at the outer peripheral edge portion of the mask main body 20, and the lower seal area 43 is between the lower seal area 43 and the central area 19a. It is located closest to the outer edge of the mask body 20. By having such an arrangement, the outer peripheral seal area 40 can effectively prevent the floating of the lower end edge extending downward from the lower seal area 43 in the worn state.

Referring to FIGS. 4 and 5, in the worn state of the mask 10, a force F3 directed from the central portion on which the elastic strip 60 is disposed at the upper end portion of the mask body 20 to both sides and the free portion 32 of the ear hooking portion 30 A downward force F1 acts on the upper fixed portion 34A by the generation of a force F5 that pulls backward or obliquely downward. On the other hand, at the lower end portion of the mask main body 20, a force F4 directed from the central portion to both sides of the jaw portion 23 and a force F6 pulling the same obliquely upward at the free portion 32 of the ear hook portion 30 act. An upward force F2 acts on the lower fixed portion 34B.

Between the upper and

lower fixing portions

34A and 34B of the side edges 18 of the mask main body 20, forces F1 and F2 directed in opposite directions act to cause the side edges 18 to be deformed and separated from the face so as to be lifted. is there. If both side edges 18 have a relatively low rigidity, it is possible to disperse and absorb the force to deform it, but if the overall rigidity of the mask body 20 is relatively high, It does not fit on the face and may be lifted.

In the mask 10 according to the present embodiment, the required rigidity is obtained by forming the

high rigidity regions

13A and 13B by positioning the plurality of ridges 28 in the entire mouth covering 24 at both side edges 18 of the mask main body 20. By providing the low rigidity region 14 partially, it is possible to disperse and absorb the force for deforming the both side edges 18.

Referring to FIG. 6, in the low rigidity region 14, by absorbing and dispersing the force F2 directed upward from the lower fixing portion 34 </ b> B of the ear hook portion 30, the low rigidity region 14 is in the front-rear direction on the inner surface side of the mask body 20. Tucked to be folded in the Thus, by absorbing and dispersing upward force F 2 in low rigidity region 14, a gap is formed in which both side edges 18 are deformed so as to protrude from the face and pollen, dust, etc. in air enter. Can be suppressed. Further, in the low rigidity region 14, the mask main body 20 is convexly bent outward from the upper end edge 20 a to the lower end edge 20 b by being tucked so as to overlap in the front-rear direction, along the wearer's face line It has a parabolic contour line.

Also, for example, when the high rigidity area is disposed only above the low rigidity area and the high rigidity area is not disposed below, there is no portion that becomes a bending base point receiving an upward force, and thus low. It is not possible to induce bending in the rigid region. In the mask 10 of the present embodiment, the low rigidity region 14 and the low rigidity region 14 are provided by the first high rigidity region 13A adjacent to the upper side of the low rigidity region 14 and the second high rigidity region 13B adjacent to the lower side. The bending is induced based on the two boundaries (stiffness change points) 16 and 17 with the first and second

high rigidity regions

13A and 13B, and the low rigidity region 14 is bent in a tack shape.

Referring to FIG. 4, when the ear hooking portion 30 is wound around the ear 80, the force F6 for pulling upward in a diagonally direction is larger than the force F5 for pulling downward in a diagonally direction. F2 becomes greater than the downward force F1. In order to suppress the deformation of the side edges 18, it is preferable to dispose the bending guiding means 15 in the vicinity of the lower fixing portion 34B on which the upward force F2 acts, and the transverse center line Q or more At the upper side, the side edges 18 deform before absorbing and dispersing the upward force F2. In the mask 10, the bending guiding means 15 composed of the first and second

high rigidity areas

13A, 13B and the low rigidity area 14 is located below the transverse center line Q, that is, the lower fixed portion 34B. By locating in the vicinity of, the upward force F 2 can be absorbed and dispersed in the low rigidity region 14 as soon as possible, and the deformation of the side edge 18 can be suppressed.

Specifically, when the dimension of the mask main body 20 in the vertical direction Y is about 60 to 100 mm, the separation dimension R3 in the vertical direction Y from the transverse center line Q to the low rigidity region 14 is about 2.0 to 8. It is preferable that it is 0 mm. When the separation dimension R3 is in such a range, the force F2 directed upward from the lower fixing portion 34B of the ear hook portion 30 is absorbed and dispersed in the low rigidity region 14 and is bent starting from that in the wearing state be able to.

The second high rigidity region 13B of the bending guiding means 15 is composed of an outer joint portion 41A forming an embossed line of the side seal region 44 and a plurality of inner joint portions 41B positioned outside the width direction X thereof. The wide junction 45 is located. By positioning the wide joint 45 in the second high rigidity area 13B at both side edges 18 of the mask main body 20, the total area of the

joints

41A and 41B of the second high rigidity area 13B (per unit area) is It can be said that the second high rigidity region 13B is higher in rigidity than the first high rigidity region 13A. Therefore, the correlation between the rigidity values of the first and second

high rigidity regions

13A and 13B and the low rigidity region 14 at the side edge portions 18 is: second high rigidity region 13B ≧ first high rigidity region 13A> low rigidity region 14 It becomes.

The rigidity difference between the first high rigidity region 13A and the second high rigidity region 13B causes the bending ease at the

boundaries

16 and 17 between the

high rigidity regions

13A and 13B and the low rigidity region 14 to be different. It becomes easier to guide the bending in the guiding means 15. In addition, since the wide bonding portion 45 is positioned in the second high rigidity area 13A, the upward force F2 can be received in a wide range and absorbed in the low rigidity area 14, and thus bending at the boundary 16 becomes easier. .

<Modification>
With reference to FIGS. 7 and 8, in the mask 10 according to the present modification, the bonding portion 41A is not disposed in the low rigidity region 14, and the non-sealed region (folding assisting means) 51 is formed. In order to absorb and disperse the force for deforming the side edges 18 in the low rigidity area 14, the rigidity of the low rigidity area 14 is preferably as low as possible, and the outer joint of the side seal area 44 to increase the rigidity. It is preferable that the portion 41A is not disposed. In the present embodiment, the non-sealed area 51 is not disposed at the non-overlapping portion, and the rigidity of the low rigidity area 14 has a predetermined relatively low rigidity and is more reliable. It becomes easy to bend by absorbing and dispersing the upward force F2. That is, the non-sealed area 51 is for assisting the function of the low rigidity area 14 as a bending guide. In order to exhibit such an effect, it is preferable that the dimension in the vertical direction Y of the non-sealed area 51 be larger than the separation dimension (pitch) between the plurality of outer joint portions 41A of the side seal area 44. When the dimension in the vertical direction Y of the non-sealed area 51 is equal to or smaller than the distance between the outer joined portions 41A, the non-sealed area 51 faces upward at the separated portion between the outer joined portions 41A in the side seal area 44. The force F2 is absorbed, dispersed, and bent, and there is a possibility that the entire mask main body 20 can not be bent in a predetermined shape.

Referring to FIG. 9, in the worn state of the mask 10 according to the present embodiment, the side edges 18 of the mask main body 20 do not have a portion separated from the face and protruding from the face line. Further, since both side edges 20c and 20d of the mask main body 20 draw a gentle parabola shape that is convex inward in the low rigidity region 14, they can be along the face line and fit on the face. In addition, since the jaw portion 23 has a round shape consisting of the central portion 19a and the side curved

portions

19b and 19c along the contour line of the jaw, the jaw is fitted to the jaw so that the jaw is wider than it actually is. It can not be seen.

In the case of a general, generally rectangular disposable mask, the sharp corner at the lower end forms an outline line which is greatly deviated from the face line, which may give an image that the face is larger than it actually is. is there. On the other hand, when the portion to be in contact with the jaw of the wearer is extremely narrow, a part of the chin is exposed, and the size of the mask being worn is the size of the face It may give an impression that it does not fit.

Referring again to FIG. 2, in the mask 10 according to this embodiment, in the jaw portion 23 of the mask 10, a first line K1 extending in the width direction X from points P1 located on both sides of the central portion 19a; An intersection angle θ1 of the second line K2 connecting the lower end edge of the free portion 32 and the inner edge of the lower fixed portion 34B is 10 to 40 degrees, preferably 15 to 35 degrees. If the crossing angle θ1 is less than 10 degrees, the outer shape may be such that the contact portion 23 protrudes laterally from the line of the jaws, and the face may give an impression of being long laterally, while the crossing angle θ1 exceeds 40 degrees. As a result, the jaws 23 become too sharp, which may make the wearer's face look more vertical than it actually did, compared to before wearing the mask 10. Since the mask 10 has a crossing angle θ1 in the range of 10 to 40 degrees, the side edges 20c and 20d have a gentle parabola shape in which the concave portions in the low rigidity region 14 are concave and the face is appropriately rounded Because of the shape, the area from the lower cheek to the chin gives a clearer impression than the actual face line, and it is possible to exert a small face effect such that the size of the face is smaller than the actual size.

<Method for evaluating small face effect>
<Pre-evaluation method>
First, as preparation for preparation, as data to be used for evaluation, 540 pieces of photo images (photographed above the shoulder) of a Japanese woman's face, a 24-inch liquid crystal display, a head mannequin (a Japanese woman in his twenties We prepared a face model with standard size, Bioskindor F-300S, View Lux). Next, a pre-evaluator (a total of 36 men and women aged 18 and over) was placed in a chair 60 cm away from the screen of the liquid crystal display placed on the desk. On the screen of the liquid crystal display, an image photograph is displayed in a predetermined size (a JPEG image of 354 × 472 pixels, 9.8 cm long × 13.07 cm wide), and a head mannequin is disposed beside the liquid crystal display. The pre-evaluator examines the photographic image A displayed on the screen of the liquid crystal display against the head mannequin and compares the size of the face of the head mannequin with the size of the face of the head mannequin by 50 points. It evaluated in the range of 100 (a face is so large that a number is large), and it was set as the prior evaluation value. The pre-evaluator showed the pre-evaluation value by operating the mouse of the PC main body connected to the liquid crystal display with one hand and moving the cursor to an appropriate number on the visual analog scale. In addition, about the evaluation order of the image photograph by each evaluator, and evaluation number of sheets, it carried out at random.

The prior evaluation value by each prior evaluator was totaled for every photography image, and the average value was computed. Note that the number of evaluators was different for each photographic image, and on average, 18 persons evaluated one photographic image. FIG. 10 shows a histogram created on the basis of the prior evaluation values (the vertical axis is the frequency, and the horizontal axis is the class of the face size), and the average value of the distribution is 51.3, standard The deviation was 7.7, the minimum was 32.5, and the maximum was 77.6. 22 photo images (small faces) in ascending order from the minimum value of this distribution, 22 photo images (faces of average size) from average value, 22 photo images (large face) in descending order from maximum value A total of 66 photograph images (photograph image A) of were used as the images used in the following evaluation.

<This evaluation method>
A photographic image A prepared in advance and a photographic image B in which the mask 10 was worn on the face of the photographic image A by image editing software were prepared. This evaluator (a total of 11 men and women aged 18 and over, who are different from the pre-assessor) has 66 photo images (33 photo images A and B each) under the same conditions as the pre-evaluation method. The size of the appearance face was evaluated one by one. At the time of main evaluation, adjustment was made so that each main evaluator would not evaluate both the photographic image A and the photographic image B by the same person. The photographic images A and B evaluated by each main evaluator were randomly selected. The main evaluation value obtained by the main evaluation is 6 of the presence or absence of the mask 10 (photo image A, photo image B) × original face size (small face, average face size, large face) The data were tabulated for each condition, and the average value and its standard error were calculated.

<This evaluation result>
Referring to FIG. 11, in “a small face in a state where the mask 10 is not worn”, while the average of the main evaluation value (the main evaluation value of the photographic image A) when not wearing is 40.5, The average of the main evaluation value (the main evaluation value of the photographic image B) in the state of wearing 10 was 33.5. In addition, even in "a face of average size in the state of not wearing the mask", the average of the main evaluation value when not wearing is 53.3, whereas this evaluation value in the state of wearing the mask 10 Even in the case of an average of 44.8, "a face that is large in the state of not wearing the mask", this evaluation value in the state of wearing the mask 10 while the average of the present evaluation value when not wearing is 70.6. The average size was 63.1, and in any case, regardless of the size of the face without wearing the mask 10, when the mask 10 was worn, the apparent size of the face felt small .

In addition, when the two-factor analysis of variance with respect to the six conditions described above is performed on the main evaluation value obtained by the main evaluation, the main effect (F (1, 10) = 10.40, p = 0) of the presence or absence of the mask 10 .09), the main effect of the original face size (F (2, 20) = 91.55, p = .001), and statistically significant results could be obtained. An interaction between the presence of the mask 10 and the size of the original face was not observed. Therefore, regardless of the size of the original face, it is possible to obtain the statistical result that the face wearing the mask 10 looks smaller (looks like a small face) than the face not wearing it.

In addition to the materials described herein, known materials commonly used in this type of field can be used without limitation for the members constituting the mask 10, unless otherwise specified. . Also, the terms "first" and "second" as used herein are used merely to distinguish similar elements, locations, and the like.

DESCRIPTION OF SYMBOLS 10 disposable mask 13A 1st high rigidity area 13B 2nd high rigidity area 14 low rigidity area 15 bending induction means 20 mask main body 21 base material sheet 28A ~ 18D ridge part 41 junction part Q transverse center line W3 vertical direction of high rigidity area Dimension W4 Vertical dimension of low rigidity region X Width direction Y Vertical direction

Claims

A disposable mask having a vertical direction and a width direction and including a mask body and a pair of ear hooks,
Below the transverse center line bisecting the vertical dimension of the mask body,
The mask in which a low rigidity region having low rigidity as compared with other portions is located extending in the width direction and having a predetermined width in the vertical direction.
The high rigidity area is located above and below the low rigidity area and adjacent thereto, and the high rigidity area is higher in rigidity than the low rigidity area and lower than the transverse center line. Description mask.
The mask body has a ridge portion formed of a superimposed portion obtained by folding a sheet, the ridge portion extends over the entire area in the width direction of the mask body, and the high rigidity region is formed from the ridge portion The mask according to claim 1, wherein the low rigidity region is formed of a non-overlapping portion located between the ridges.
The mask according to any one of claims 1 to 3, wherein the mass per unit area of the sheet in the high rigidity region is higher than the mass per unit area of the sheet in the low rigidity region.
The low rigidity area, a first high rigidity area located above the low rigidity area, and a second high rigidity area located below the low rigidity area, and the correlation of their rigidity is the 5. The mask according to any one of claims 1 to 4, wherein the second high stiffness region ≧ the first high stiffness region> the low stiffness region.
The mask according to any one of claims 1 to 5, wherein the dimension in the vertical direction of the high rigidity region is 6 to 12 mm, and the dimension in the vertical direction of the low rigidity region is 1 to 7 mm.
The mask according to any one of claims 1 to 6, wherein bending guiding means are located on both sides of the low rigidity region.
The vertically extending seal area, which is formed of a plurality of joints, is disposed on both sides of the mask body, and the bending induction means is formed from a non-seal area where the joints are not disposed. A mask according to claim 7 formed.