JP3824461B2 - Disposable mask and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable mask that is excellent in wearability, is inexpensive, and has high productivity, and a method for manufacturing the same.
[0002]
[Prior art and problems]
As prior arts related to conventional disposable masks, there are those described in, for example, JP-A-2-74053, JP-A-3-254762, and JP-A-7-275384.
[0003]
The one described in Japanese Patent Laid-Open No. 7-275384 is not necessary when cutting into individual masks because the center of the mouth is curved and welded so that the mask becomes three-dimensional when used. The proportion of the part is large. Further, the trimming loss of the material increases in order to adjust the final shape of the mask after cutting. Therefore, there is a problem that work efficiency is low and mass productivity is inferior and material costs are wasted.
[0004]
Further, since unnecessary portions are disposed of, there is a problem that resources are not effectively used. Further, as described in the publication, there is a problem that the manufacturing process is likely to be complicated and the cost is likely to rise, so that it is not suitable for a disposable mask.
[0005]
In addition, the mask disclosed in Japanese Patent Laid-Open No. 2-74053 is obtained by forming an ear hook by making a cut in a rectangular plate-like foamed elastic body, and the mask described in Japanese Patent Laid-Open No. 3-254762 is U-shaped on a stretchable nonwoven fabric. However, simply forming an ear hook on an elastic body or stretchable nonwoven fabric is a burden on the ear, and if used for a long time, it is likely to cause pain to the user's ear. .
[0006]
Furthermore, as in the mask described in Japanese Patent Application Laid-Open No. 3-254762, the one using rubber for the ear hook tends to be low in mass productivity. In addition, the manufacturing process is complicated, and there is a problem that defective products are easily generated. In addition, the burden on the ear due to rubber is large, and the user's ear tends to be painful if used for a long time.
[0007]
An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a disposable mask which is inexpensive and excellent in mass productivity by reducing trim loss at the time of manufacture and a method for manufacturing the same.
[0008]
Another object of the present invention is to provide a disposable mask capable of forming a portion to be hooked with a sufficient length even when the area of the sheet material to be used is small.
[0009]
[Means for Solving the Problems]
  The present invention relates to a disposable mask comprising a mouthpiece sheet that is applied to the mouth at the time of use, and an earpiece sheet that is located on both sides of the mouthpiece sheet and in which cuts or holes for earring are formed.
  The upper edge of the mouthpiece sheet and the upper edge of each ear hook sheet are located on the same line, and the ear hook sheetIs provided with an edge line L3 having a starting edge P1 at its lower edge and a terminal edge P2 at its upper edge,SaidEnd P2 is more than start P1Located away from the mouthpiece sheet,
  The edge lineL3Is180 degrees with respect to the midpoint between the start point P1 and the end point P2It has a rotationally symmetric shape.
[0010]
  For example, an extension line (L1) in which the lower edge of the ear hooking sheet extends in the left-right direction, an imaginary line (L2) extending in the vertical direction starting from the upper end of the edge line of the ear hooking sheet, and the ear hook When the space region surrounded by the edge line (L3) of the sheet is (A), the space region (A) and the shape of the ear hooking sheet areFor the midpoint of the edge line L3It is a rotationally symmetric shape.
[0011]
In the disposable mask according to the present invention, a completed mask can be obtained simply by cutting the ear-hanging sheet into a predetermined shape. At this time, since the ear hanging sheet is cut and separated symmetrically in the vertical direction, the trim loss of the sheet is reduced in the operation of separating the disposable mask, and the yield of the material can be increased. Moreover, since the upper edge of the ear hooking sheet having the separated shape can be positioned on the same line as the upper edge of the mouthpiece sheet, the ear hooking sheet has a shape that is easily hung on the left and right ears. Thus, since a flat sheet-like disposable mask can be formed in a shape that reduces trim loss and is easy to put on the ear, a mask with high work efficiency and excellent mass productivity can be obtained.
[0012]
  The present invention also providesSaidOral seatOn both sidesEar cover sheetLine upDirection left and rightWhen the direction perpendicular to the left-right direction is the up-down direction,
  The ear hook sheet includes a substantially U-shaped or substantially U-shaped cut line in which a curved portion or a straight portion is directed toward the center in the left-right direction, and the left and right sides outside the cut line in the left-right direction. A cut line extending to the edge in the direction is formed, and the portion surrounded by the substantially U-shaped or substantially U-shaped cut line can be bent outward in the left-right direction.Has beenIs.
[0013]
  OrSaidOral seatOn both sidesEar cover sheetLine upDirection left and rightWhen the direction perpendicular to the left-right direction is the up-down direction,
  The ear hook sheet has a comb-like cut line having a cut line extending in the left-right direction or the vertical direction and a plurality of branch cut lines that are continuous with the cut line and intersect the cut line. A cut line extending between the edge cut line from the edge of the ear hooking sheet is formed, and a portion surrounded by each cut line can be expanded in the left-right direction.What is beingIt is.
[0014]
In the present invention, it is not necessary to attach rubber for earrings or the like when manufacturing the mask. Moreover, since the ear hook is formed by folding the part surrounded by the cut line formed in the ear hook sheet at the time of use by the user, or by expanding left and right, the entire sheet material is used. Even if the area is small, it is possible to form an ear hook that extends sufficiently long in the left-right direction, and the burden on the ear is reduced when it is hooked on the ear.
[0015]
In the above, it is preferable that the ear-hanging sheet has higher stretchability in the left-right direction than the mouthpiece sheet.
[0016]
For example, the ear hook sheet is preferably made of a stretchable nonwoven fabric or a member obtained by bonding a stretchable film to a nonwoven fabric.
[0017]
Further, the whole is formed of a stretchable sheet, and the center portion of the sheet is subjected to pressure processing to reduce stretchability, and the center portion with reduced stretchability is the mouthpiece sheet. The both side portions may be the ear hooking sheet. In this case, the pressing process is, for example, embossing.
[0018]
In addition, in the above, it is preferable that the ear hook sheet and the mouthpiece sheet are bonded by any one of hot emboss bonding, ultrasonic bonding, or hot melt adhesive.
[0019]
  The method for manufacturing a disposable mask includes: a mouthpiece sheet that is applied to the mouth when in use; and an earpiece sheet that is located on both sides of the mouthpiece sheet and that has ear cuts or holes. In the method
  Forming a continuous sheet continuously extending in the longitudinal direction with a constant width dimension;
  Cutting the continuous sheet at a cutting line connecting the starting end P1 located at one edge of the continuous sheet and the terminating end P2 located at the other edge of the continuous sheet and having a different longitudinal position; Forming the cutting lines at regular intervals to separate individual masks,
  An ear hook sheet formed at a portion sandwiched between the one edge and the cutting line, and an ear hook sheet formed at a portion sandwiched between the other edge and the cutting line., Against the midpoint of the cutting lineThe cutting lines are formed so as to be rotationally symmetrical with each other, and the masks separated by the cutting lines are rotationally symmetrical with each other.
[0020]
  In the above,A sheet having a predetermined length and a mouthpiece sheet having a predetermined length are alternately arranged and joined together to form the continuous sheet, and the cutting line can be formed on the sheet. Alternatively, as the continuous sheet, a sheet integrally continuous in the longitudinal direction can be used.
[0021]
In the above manufacturing method, the shape of the cut ear mask sheet of the disposable mask and the shape of the ear hook sheet of the connecting sheet can be made the same shape. Therefore, trim loss of the ear hook sheet can be reduced, the yield of the material can be improved, and the manufacturing process can be simplified.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
  The present invention will be described below with reference to the drawings.
  1 is a plan view showing a first embodiment of the disposable mask of the present invention, FIG. 2 is a sectional view of the disposable mask of FIG. 1 according to the embodiment, (A) is a first sectional view, (B ) Is the second cross-sectional view, (C) is the third cross-sectional view, and FIGS. 3 (A), (B), (C), (D), (E), (F), (G) are shown in FIG. FIG. 4A, FIG. 4B, FIG. 4C, FIG. 4D, FIG. 4E, FIG. 4F, and FIG., Reference examplePlan view, FIG. 5 (A),(B),The ear hook can be folded outward in the left-right direction.Reference exampleFIG.
[0026]
The mask 1 shown in FIG. 1 is a so-called disposable mask that is used only once, for example, at a food processing plant or a light dust workshop, and then discarded.
[0027]
The disposable mask shown in FIGS. 1 and 2 has a configuration in which a mouthpiece sheet 2 is provided in the center of the mask 1 and ear hooking sheets 3 and 3 are provided on both sides thereof. The ear hook sheet 3 has cut lines 5 and 5 made of cut lines forming the ear hook.
[0028]
In the disposable mask 1A having the cross-sectional shape of FIG. 2 (A), the mouthpiece sheet 2 and the ear cover sheets 3 and 3 provided on both sides thereof are made of different materials, respectively. One disposable mask 1A is formed by joining the hanging sheet 3.
[0029]
In the above, the mouthpiece sheet 2 is formed of a nonwoven fabric having a low stretch rate (hereinafter referred to as a non-stretchable nonwoven fabric), for example, a nonwoven fabric bonded by a needle punch method or a water jet method, a nonwoven fabric by a spunbond method, a thermal self-adhesive nonwoven fabric, etc. It is preferable to do this. As the ear-hanging sheet 3, a nonwoven fabric having a higher stretch rate than the mouthpiece sheet 2 (hereinafter referred to as a stretchable nonwoven fabric), for example, a nonwoven fabric in which fibers are entangled by needle punching or high-pressure water flow and stretched by heat treatment or the like. Or a non-woven fabric in which the fiber itself is self-fused by the spunbond method or the like and the fiber itself has elasticity.
[0030]
The stretchable nonwoven fabric preferably uses stretchable fibers such as crimped fibers. Alternatively, a stretchable film may be bonded to the nonwoven fabric. In this case, the nonwoven fabric is preferably a stretchable nonwoven fabric or a high elongation nonwoven fabric, and the stretchable film is urethane, rubber, ester, olefin, or the like. preferable. And as a bonding method, the lamination method, the partial heat bonding method, etc. are preferable. Further, as means for joining the mouthpiece sheet 2 and the ear hook sheet 3, those by adhesion by hot embossing, adhesion by ultrasonic waves, adhesion using an adhesive such as HMT (hot melt) or the like are preferable.
[0031]
  Moreover, like the disposable mask 1B shown in FIG. 2B, a sheet 2A having a low expansion / contraction rate is bonded to the center of one elastic sheet, and the portion where the sheet 2A is bonded is used as the mouthpiece sheet 2. Both side portions where the sheet 2A is not joined may be used as the ear hooking sheet 3. Or the disposable mask 1C shown in FIG.ofThus, the entire mask is formed of a highly elastic ear-hanging sheet, and the mouthpiece sheet 2 is formed by applying pressure processing such as embossing 3a to the central portion of the mask to reduce the stretchability. It is also possible to form the ear hooking sheet 3 having higher elasticity than the mouthpiece sheet 2 without applying the pressing process or by applying a pressing process that is lighter than the center part.
[0032]
  Embodiments shown in FIGS. 1 and 3A to 3G, 4A to 4G, etc.And reference examplesThen, the ear cover sheet 3, the mouthpiece sheet 2, and the ear cover sheet 3Lined upThe direction is the left-right direction, and the direction perpendicular thereto is the up-down direction. Further, the upper side in the figure is a portion that hangs on the wearer's nose, and the lower side is a portion that hangs on the wearer's jaw. It is also possible to use it upside down.
[0033]
In the disposable mask 1 shown in FIGS. 1 and 3A to 3G, the upper edge of the mouthpiece sheet 2 and the upper edges of the ear hooking sheets 3 and 3 on both sides are located on the same line. The ear hooking sheet 3 is cut and separated into a point-symmetrical shape or a substantially point-symmetrical shape in the vertical direction and the horizontal direction. In particular, what is shown in FIGS. 1 and 3 (A) to 3 (F) is a rectangular area surrounded by the upper edge of the ear hooking sheet 3 and the virtual lines L1 and L2, and the surface occupied by the ear hooking sheet 3 and the space area. The portion A is point symmetric vertically and horizontally. Therefore, in these embodiments, as will be described later in the manufacturing method, almost no trim loss of the sheet can be eliminated. The same applies to the one shown in FIG.
[0034]
1 and 3 (A) to 3 (G), the upper edge of the mouthpiece sheet 2 and the upper edge of the ear hook sheet 3 are located on the same line, and the ear hook sheets 3 and 3 are disposable masks. Since it occupies 1 upper part, it is the shape which extends the cut | interruption 5 formed in this ear hanging sheet | seats 3 and 3, and is easy to hang | wear to a wearer's right and left ear.
[0035]
4A to 4G, the ear hooking sheet 3 is a quadrilateral, and the ear hooking sheet 3, the mouthpiece sheet 2, and the connection body with the ear hooking sheet 3 are band-like in the left-right direction. As will be described later in the manufacturing method, the disposable mask shown in FIGS. 4A to 4G also has a small trim loss of the sheet at the time of manufacturing, and can improve the material yield.
[0036]
The cut 5 formed in the ear hooking sheet 3 can take various forms. For example, the shape of the cut 5 of the disposable mask shown in FIGS. 1, 3E, 3F, and 4G is a cut line 5c extending in the left-right direction or the up-down direction and the cut. A comb-like cut formed with a plurality of branch cut lines 5d intersecting (orthogonal) with the line 5c, and a cut line 5e extending between the edge cut sheet 5d and the edge cut line 5d. It has been formed.
[0037]
In the case of having the cut line 5, even when the area of the ear hooking sheet 3 is small, the part surrounded by the cut line can be developed left and right during use to form a sufficiently long ear hooking part. Therefore, when not in use, the area is small, so that the sheet material to be used can be minimized, and the burden on the ear is reduced during use. Note that the mask cut shown in FIG. 4A also has a comb-like cut as described above.
[0038]
The disposable mask 1 ′ shown in FIG. 5 (A) can be manufactured in the same process as that shown in FIGS. 4 (A) to (G). In this disposable mask 1 ′, rectangular ear hooking sheets 3 and 3 are provided at both ends of the mouthpiece sheet 2. The ear hooking sheets 3 and 3 are provided with a substantially U-shaped cut line 5a with the straight line portion facing the center side (mouthpiece sheet 2), and outside the cut line 5a. A cut line 5b extending in the left-right direction (the X1-X2 direction in the drawing) is formed. Then, as shown in FIG. 5B, by folding the portions surrounded by the cuts (cut lines 5a) 5 and 5 to the front or back side of the ear hook sheet 3, the ear hooks 6 and 6 are opened. It is formed so as to protrude outward (X1 and X2 directions) away from the contact sheet 2. The cut line 5a may be substantially U-shaped.
[0039]
Thus, if the substantially U-shaped cut line 5a or the substantially U-shaped cut line is formed and the portion surrounded by the cut line can be bent outward, When used, the entire area is small, and when used, the substantial dimension in the left-right direction of the disposable mask can be increased, which makes it easy to put on the wearer's ear.
[0040]
4A and 4D, as in FIG. 5, a portion surrounded by a cut line can be bent to both sides in the left-right direction to form an ear hooking portion.
[0041]
3 (A), (B), (C), (D), and FIGS. 4 (B), (C), (E), and (F), the ear hooking sheet 3 is formed of a highly elastic sheet on the left and right. By doing so, it is possible to easily put the ear hook on the ear.
[0042]
  Below, the manufacturing method of a disposable mask is demonstrated.
  FIG. 6 shows the disposable mask.ofManufacturing method (verticalFlow(I) is the first step, (II) is the second step, (III) is the third step, (IV) is the fourth step, and (V) is the fifth step. Respectively. FIG. 6 shows a side view up to the cutting means C1 and C2 in the first step (I) and the second step (II), and the subsequent steps are shown in plan views.
[0043]
In the first step (I) shown in FIG. 6, the strip-shaped non-stretchable nonwoven fabric 11 is fed rightward in the figure by the feeding means R1 from the roll-shaped raw fabric 11A, cut by the cutting means C1, The mouthpiece sheet 2 having a length dimension is formed. Similarly, in the second step (II), the belt-shaped stretchable nonwoven fabric 12 is fed rightward in the figure by the feeding means R2 from the roll-shaped raw fabric 12A, cut by the cutting means C2, and has a predetermined length dimension. The sheet | seat 12a used as the ear hook part which consists of is formed. The first step (I) and the second step (II) are performed in parallel.
[0044]
In the third step (III), the mouthpiece sheet 2 and the edge of the sheet 12a formed in the first step (I) and the second step (II) are alternately arranged in an overlapping state, For example, it is conveyed to joining means B1 by conveyance means, such as a conveyance conveyor. A portion where the mouthpiece sheet 2 and the sheet 12a overlap each other is a joining portion 13. In the joining means B1, the mouthpiece sheet 2 and the sheet 12a are joined by heat embossing adhesion, ultrasonic adhesion, or Holt melt type adhesion. Thereby, the connection sheet S1 in which the mouthpiece sheet 2 and the sheet 12a are alternately connected in the longitudinal (vertical) direction is formed.
[0045]
In the fourth step (IV), the sheet 12a of the connecting sheet S1 is cut by the cutting means C4, and the ear-hanging sheets 3 and 3 are equally cut from the sheet 12a to the left and right to form individual disposable masks 1. Disconnected.
[0046]
The state of this cutting will be described with reference to the disposable mask 1 of FIG.
In the third step (III), the upper edge of the mouthpiece sheet 2 and the upper edge of the sheet 12a are joined so as to be in the same straight line to form the connection sheet S1. Then, as a result of equally separating the left and right ear-hanging sheets 3 and 3 from the sheet 12a in the fourth step (IV), the left-right direction (X1-X2 direction) starts from the starting end P1 of the lower edge of the ear-hanging sheet 3. Imaginary lines L2, L2 extending in the direction (Y1-Y2 direction in the figure) perpendicular to the left-right direction starting from the extended lines L1, L1 respectively extending from the left and right ends P2, P2 of the upper edge of the ear hooking sheet 3; And the shape of the region A surrounded by the edge line (a substantially S-shaped cutting line connecting the starting end P1 and the terminal end P2) L3, and the shape of the ear hooking sheet 3 at both ends of the disposable mask 1 after cutting Is cut so as to be symmetrical in the vertical direction (Y1-Y2 direction). Therefore, the shape of the ear hooking sheet 3 of the disposable mask 1 cut first and the shape of the ear hooking sheet 3 of the disposable mask 1 cut later are cut in such a manner that they are vertically symmetrical and the same. The disposable masks 1 that are cut in the step (IV) can all have the same shape. Therefore, in the cutting operation by the cutting means C4, there is almost no trim loss of the sheet 12a, the waste of the sheet material is eliminated, and the yield can be improved.
[0047]
And in the 5th process (V) shown in FIG. 6, the cut | interruption 5 of a predetermined shape is formed in the ear hook sheet | seat 3 by the exclusive cut formation means C3. The cut line 5 may be formed at the same time as the ear hooking sheet 3 is separated by the cutting means C4, or the cut line 5 may be formed in a step prior to the cutting operation by the cutting means C4. Good.
[0048]
Thus, the disposable mask shown to FIG. 1 and FIG. 3 (A)-(F) can be continuously manufactured by cut | disconnecting the area | region A and the ear hook sheet | seat 3 to the shape which becomes symmetrical up and down.
[0049]
When the cutting means C4 cuts the ear-hanging sheets 3 and 3 from the sheet 12a by a crank-shaped cutting line, a disposable mask having the ear-hanging sheets 3 cut in a vertically symmetrical shape shown in FIG. It can be manufactured with little trim loss.
[0050]
Further, when the cutting means C4 shown in FIG. 6 is cut at the center of the sheet 12a by a straight cutting line orthogonal to the flow direction (MD) of the connecting sheet S1, the left and right ear hanging sheets 3 are cut into FIG. The disposable mask shown to (A)-(G) and FIG. 5 (A) (B) can be manufactured.
[0051]
In the mask 1 formed by cutting as described above, since the ear hooking sheet 3 is symmetrical in the vertical direction, unnecessary portions that are discarded are not formed. Therefore, the area occupied by the ear hanger sheet 3 can be increased, and various cut lines 5 as shown in FIGS. 3 (A) to (G) and FIGS. 4 (A) to (G) are formed on the ear hanger sheet 3. It is possible to form.
[0052]
In addition, when the ear hanging sheet 3 is a laminate sheet in which a stretchable film or the like is bonded to a nonwoven fabric, the laminate sheet is used as the sheet 12 supplied from the raw fabric 12A in the second step (II). use.
[0053]
As shown in FIG. 2 (B), when the sheet 2A having a low expansion / contraction rate is joined to form the mouthpiece sheet 2, the sheet 2A is formed from the sheet 11 having a low expansion / contraction rate in the first step (I). In the second step (II), the highly stretchable sheet 12 is supplied without being cut, and in the third step (III), the sheet 2A is joined at intervals, and the sheet 2A is joined. This part is referred to as mouthpiece sheet 2. Then, the cutting means C4 in the fourth step (IV) cuts the sheet 12 at the portion where the sheet 2A is not joined, and cuts it into the ear hooking sheet 3.
[0054]
In addition, when the embossed portion is used as the mouthpiece sheet 2 as shown in FIG. 2C, the first step (I) is omitted, and the stretchable sheet is used in the second step (II). 12 is supplied without cutting, and in the third step (III), embossing means is provided without providing the joining means B1, and the sheet 12 is subjected to embossing 3a at intervals.
[0055]
  FIG. 7 shows a method for manufacturing a disposable mask (a lateral flow method).As a reference example(A) is a side view showing the first step (I), (B) is a side view showing the second step (II), (C) is a plan view showing the manufacturing process of the entire mask, In FIG. 7C, (I) shows the first step, (II) shows the second step, (III) shows the third step, and (IV) shows the fourth step.
[0056]
In the first step (I) shown in FIG. 7A, the first sheet 21 made of a stretchable nonwoven fabric or the like is sent out from the roll-shaped raw fabric 21A in the right direction in the drawing by the feeding means R3. A slitter C5 is provided in the middle of the feeding, and the first sheet 21 is divided into two in the direction perpendicular to the feeding direction from the center as shown in FIG. , 21a are formed.
[0057]
As shown in FIG. 7 (B), in the second step (II), the second sheet (oral contact sheet) 22 made of a non-stretchable nonwoven fabric or the like is shown on the right side of the roll-shaped raw fabric 22A by the feeding means R4. In this direction, the sheet is fed between the first sheets 21a and 21a. And the joining part 23 with which the 1st sheet | seats 21a and 21a and the 2nd sheet | seat 22 overlap is joined by joining means B2, such as heat embossing adhesion | attachment, ultrasonic bonding, or hot-melt type adhesion | attachment. That is, as shown in FIG. 7C, the connection sheet S2 is formed in which the first sheets 21a and 21a are connected to both ends in the direction (vertical direction) orthogonal to the feeding direction of the second sheet 22.
[0058]
In the third step (III), the connecting sheet S2 is cut into a predetermined length by the cutting means C7 and cut into individual disposable masks 1. In the individually cut disposable mask 1, the second sheet 22 at the center serves as the mouthpiece sheet 2, and the first sheets 21 a and 21 a serve as the ear hooking sheets 3 and 3 at both ends of the second sheet 22. What is joined is manufactured.
[0059]
Next, in the fourth step (IV), a cut 5 having a predetermined shape to be the ear hook 6 is formed on the first sheets 21a, 21a at both ends by the cut forming means C6.
[0060]
In addition, the 4th process (IV) which forms the cut | interruption 5 may be performed after completion | finish of 3rd process (III) as mentioned above, and the state of connection sheet | seat S2 after completion | finish of 2nd process (II) You may go on. Or you may carry out simultaneously when cut | disconnecting to each disposable mask 1 in 3rd process (III).
[0061]
  the aboveShown as a reference exampleIn the manufacturing method, the disposable mask 1 cut first and the disposable mask 1 cut after that have the same direction of formation of the cut 5, so that the cut 5 can always be formed by the same cut forming means C6. . Moreover, also when cut | disconnecting to each disposable mask 1, since it is only necessary to cut | disconnect connection sheet | seat S2 by a predetermined width dimension, a manufacturing process can be made easy.
[0062]
In this manufacturing method, the disposable mask mainly shown in FIGS. 4A to 4G and the disposable mask shown in FIGS. 5A and 5B can be manufactured.
[0063]
  Alsothe aboveProduction methodInLeaveIsThere is no trim loss in the mouthpiece sheet or ear hook sheet after cutting into individual disposable masks 1. Therefore, there is no waste of sheet material and the yield can be increased.
[0064]
When the disposable mask 1 is used for a long time, it is preferable that the burden on the user (the feeling of pressure when worn) is small.
[0065]
Then, since the allowable range of the load (pressing force) applied to the ear in the disposable mask was examined, the result is shown below.
[0066]
FIG. 8 shows the results of a use test using disposable masks 1 of various structures, with the load (pressing force) applied to the ear as a parameter. In the following usage test, 18 monitors were used for an average of 6 hours and 13 minutes per day for 5 days.
[0067]
In addition, the load (pressing force) applied to the ear was measured using a tensile tester (Autograph: Shimadzu AG-5000B). This tensile tester measures the tensile force generated between chucks when both ends of an object to be measured are held by chucks and the distance between the chucks is increased at a constant speed.
(Measurement method of load applied to ear (compression force))
(1) Measure the interrosicular nasal arc length W (actual length from one tragus point to the other tragus point).
(2) The distance between the two chucks of the tensile tester is set to 230 mm, the cylindrical jig is held by the chuck, and the left and right ear hooks of the mask are hung on the cylindrical jig.
(3) The distance between chucks is widened at a speed of 200 mm / min to the internosal arc length W + 70 mm of the monitor. Thereafter, the tensile force when the distance between chucks is returned to W + 30 mm is measured as the compression force applied to the ear.
(Evaluation method by monitor)
A plurality of masks having different natural lengths r of the hanging width of the ear hook when the mask was flattened were prepared, and the wearing feeling of the monitor when these masks were worn was evaluated in five stages. The evaluation results are shown in FIG. The vertical axis in the evaluation result of FIG. 8 is represented by “compression force”, and this compression force is measured by the method shown in the above (1) to (3).
[0068]
For example, if the measurement result of the interarbital nasal arc length of a monitor is W = 300 mm, the mask to be measured (natural length r has various values) is expanded to a maximum of 370 mm with the tensile tester. After that, the tensile force when it is returned to 330 mm is measured, and this is regarded as the “pressing force” to the monitor equipped with the mask. The feeling of wearing the mask when the monitor was actually worn was evaluated in five levels, such as “Tight and unusable”. The vertical axis in FIG. 8 is the value of “compression force” when the mask is measured with a tensile tester, and the horizontal axis is the five-stage evaluation result of wearing feeling.
[0069]
From the result of FIG. 8, it can be said that it is a better mask condition to apply a cut to the ear hooking sheet so that the load (pressing force) applied to the ear when wearing the mask is in the range of 16 mN to 250 mN.
[0070]
Furthermore, by setting preferably in the range of 25 mN to 200 mN, the load (pressing force) applied to the ear can be reduced, and the pain felt by the user in the ear can be reduced.
[0071]
【The invention's effect】
According to the present invention described in detail above, the trim loss of the sheet when it is cut into individual masks can be reduced, the waste of sheet material can be eliminated, and the yield can be improved. Therefore, it is possible to produce with high work efficiency and excellent mass productivity.
[0072]
Further, the burden on the user's ear (feeling of pressure) can be reduced, and a disposable mask excellent in wearing feeling can be obtained.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of a disposable mask according to the present invention,
2 is a cross-sectional view of the disposable mask of FIG. 1, showing an embodiment, (A) is a first cross-sectional view, (B) is a second cross-sectional view, (C) is a third cross-sectional view,
FIGS. 3A, 3B, 3C, 3D, 3G, and 3G are plan views showing a modification of the shape of the ear hooking portion,
[Fig. 4] (A), (B), (C), (D), (E), (F), (G) areReference examplesA plan view showing,
5A is a view of the disposable mask shown in FIG.An example as a reference exampleThe top view to show, (B) is a figure which shows the use condition of the disposable mask of (A),
FIG. 6 Disposable maskofManufacturing method (verticalFlow(I) is the first step, (II) is the second step, (III) is the third step, (IV) is the fourth step, and (V) is the fifth step. Figure showing the
FIG. 7: Disposable maskReference exampleA manufacturing method (cross-flow method) is shown, (A) is a side view showing the first step (I), (B) is a side view showing the second step (II), and (C) is a manufacturing step of the entire mask. A plan view showing,
FIG. 8 is a diagram showing a result of a use test using a load (compression force) applied to the ear as a parameter;

Claims (11)

In a disposable mask comprising a mouthpiece sheet applied to the mouth at the time of use, and an earpiece sheet located on both sides of the mouthpiece sheet and having cuts or holes for earrings,
The upper edge of the mouthpiece sheet and the upper edge of each ear hook sheet are located on the same line, and the ear hook sheet has a start edge P1 at the lower edge and an end line P2 at the upper edge. L3 is provided, and the end P2 is located farther from the mouthpiece sheet than the start P1 .
The disposable mask characterized in that the edge line L3 has a rotationally symmetric shape of 180 degrees with respect to the midpoint between the start end P1 and the end point P2 . When a horizontal imaginary line extending parallel to the upper edge from the start end P1 is L1, and a vertical imaginary line orthogonal to the horizontal imaginary line L1 through the end P2 is L2,
In the quadrilateral area surrounded by the virtual line parallel to the vertical virtual line L2, passing through the start end P1, the vertical virtual line L2, the upper edge, and the horizontal virtual line L1, the edge line L3 The segmented ear-hanging sheet and a space are located, and the ear-hanging sheet located in the region and the space are rotationally symmetric with respect to a midpoint of the edge line L3. The disposable mask described. The disposable mask according to claim 1 or 2, wherein the mouthpiece sheet and the ear hook sheet are formed separately and the both sheets are joined. The disposable mask according to claim 1 or 2, wherein the mouthpiece sheet and the ear cover sheet are formed continuously and integrally. The disposable mask according to any one of claims 1 to 4 , wherein the ear hooking sheet has higher elasticity than the mouthpiece sheet. The disposable mask according to any one of claims 1 to 5 , wherein the edge line has an S shape. When the direction in which the ear hooking sheets are arranged on both sides of the mouthpiece sheet is the left-right direction, and the direction perpendicular to the left-right direction is the up-down direction,
The ear hook sheet includes a substantially U-shaped or substantially U-shaped cut line in which a curved portion or a straight portion is directed toward the center in the left-right direction, and the left and right sides outside the cut line in the left-right direction. A cutting line extending to an edge in a direction is formed, and a portion surrounded by the substantially U-shaped or substantially U-shaped cutting line is bendable outward in the left-right direction. The disposable mask according to any one of 1 to 6 . When the direction in which the ear hooking sheets are arranged on both sides of the mouthpiece sheet is the left-right direction, and the direction perpendicular to the left-right direction is the up-down direction,
The ear hook sheet has a comb-like cut line having a cut line extending in the left-right direction or the vertical direction and a plurality of branch cut lines that are continuous with the cut line and intersect the cut line. A cut line extending between the edge cut line from the edge of the ear hooking sheet is formed, and a portion surrounded by each cut line can be developed in the left-right direction. The disposable mask according to any one of 6 above. In a method for producing a disposable mask comprising a mouthpiece sheet to be applied to the mouth at the time of use, and an earpiece sheet that is located on both sides of the mouthpiece sheet and is formed with a cut or hole for earring,
Forming a continuous sheet continuously extending in the longitudinal direction with a constant width dimension;
Cutting the continuous sheet at a cutting line connecting the starting end P1 located at one edge of the continuous sheet and the terminating end P2 located at the other edge of the continuous sheet and having a different longitudinal position; Forming the cutting lines at regular intervals to separate individual masks,
An ear hook sheet formed at a portion sandwiched between the one edge and the cutting line, and an ear hook sheet formed at a portion sandwiched between the other edge and the cutting line are included in the cutting line. A method for manufacturing a disposable mask, wherein the cutting lines are formed so as to be rotationally symmetric with respect to a point, and the masks separated by the cutting lines are rotationally symmetric with respect to each other. Has a predetermined length of the sheet, the step of forming the continuous sheet arranged joined to each other alternately and mouth contact sheet of a predetermined length, according to claim 9, wherein forming the cutting line on the sheet Manufacturing method for disposable masks. The manufacturing method of the disposable mask of Claim 9 which uses the sheet | seat continuous integrally in the longitudinal direction as the said continuous sheet.

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