JP6397826B2 - mask - Google Patents

Description

  The present invention relates to a mask used for protection from cold viruses, pollen, dust, PM2.5, and the like.

  In recent years, in addition to hay fever masks and cold prevention masks, PM (particulate matter) 2.5 and other fine particulate matter masks that affect the circulatory system such as the respiratory system and the heart and blood vessels. Demand is increasing. Conventionally, an N95 mask is known as a mask for countermeasures against fine particulate matter, but there are problems such as high price, poor design, and suffocation. Therefore, a mask that is a general mask and has improved adhesion between the side portion of the mask main body and the face is desired in order to suppress intrusion of PM2.5. The N95 mask is a mask that has cleared the N95 standard of the National Institute of Occupational Safety and Health (NIOSH) and has been approved.

  For example, as a mask with improved adhesion between the side portion of the mask body and the face, Patent Document 1 discloses a mask body portion that has been pleated in the horizontal direction and a line ( A string-like or belt-like ear-hook member, and one end and the other end of the ear-hook member are predetermined such that a tensile force by the ear-hook member acts on the outside in the vertical direction of the mask main body when the mask is mounted. There is disclosed a mask that is attached at intervals to suppress the bending of the lateral end portion of the mask main body at the time of wearing, thereby improving the adhesion between the side of the mask main body and the face.

Japanese Unexamined Patent Publication No. 2011-182810

  However, even in the mask described in Patent Document 1, there is a possibility that a gap may be formed between the side of the mask body and the face, and there is room for improvement.

  The present invention has been made in view of the above problems, and when attached, the side portion of the mask body adheres well to the face, and a gap is not formed between the mask body and the face. It is an object of the present invention to provide a mask that can suppress entry of fine particles into the surface.

The above problem can be solved by the following means.
(1) A mask comprising a mask body and ear hooks formed at both lateral ends of the mask body, wherein a plurality of pleats are formed by overlapping a part of the mask body,
The plurality of pleats are stopped by welds formed by heat sealing,
The welded portion is formed in a straight line at equal intervals in the vertical direction on both sides in the horizontal direction of the mask body,
A mask characterized in that an interval between adjacent welds is 3 mm or more.
(2) The mask according to (1), wherein both lateral ends of the mask body are covered with side tape.
(3) The side tape is made of the same material as the ear hook,
The mask according to (2), wherein the ear hook is attached to the side tape.
(4) The mask according to (2) or (3), wherein the welded portion is formed by superposing and heat-sealing the side tape and the mask main body.
(5) Temporarily welded portions in which the plurality of pleats are temporarily fixed by heat sealing are provided in the lateral direction of the mask body rather than the welded portions at both lateral ends of the mask body covered with the side tape. Formed on the outside,
The mask according to any one of (2) to (4), wherein the number of the temporary welded portions in the vertical direction is smaller than the number of the welded portions.
(6) The mask according to (5), wherein at least a part of the temporary welded portion overlaps the welded portion in the longitudinal direction.
(7) The mask according to (5) or (6), wherein a minimum interval between the adjacent temporary welding portions in the vertical direction is larger than an interval between the welding portions.
(8) At the upper end portion and the lower end portion of the mask body, a lateral weld portion formed by heat sealing is formed, extending in the lateral direction of the mask body,
The mask according to any one of (1) to (7), wherein an interval between the weld portions in the vertical direction is larger than an interval between the horizontal weld portions in the horizontal direction.
(9) The mask body is provided with side blocks so as to cover a gap between the face and the mask body at both lateral ends on the side of the mask body that contacts the face of the wearer. The mask according to any one of (1) to (8).
(10) The mask main body is provided with a chin receiving pocket for receiving the chin of the wearer at a lower end portion of the mask main body on the side contacting the wearer's face (1). The mask according to any one of (9) to (9).

According to the mask described in (1) above, since the interval between adjacent welded portions is secured at 3 mm or more in the welded portions formed on both sides in the horizontal direction of the mask main body, both end portions in the horizontal direction of the mask main body are worn. It is easy to follow the shape of the person's face (hereinafter also referred to as shape familiarity), and the gap between the side of the mask body and the face is reduced and the adhesion is increased, effectively preventing fine particles from entering the mask. Can be suppressed.
According to the mask as described in said (2), since the both ends of the mask main body of the mask body are covered with the side tape, the fluff of the cut surface of a mask main body can be suppressed, and the touch can be improved.
According to the mask described in the above (3), since the ear hooking portion is attached to the side tape made of the same material, the ear hooking portion can be firmly attached by melting the same material by heat sealing. .
According to the mask described in (4) above, when the side tape is welded to the mask main body separately from the welded portion, the shape conformability deteriorates. However, by welding the side tape at the welded portion, the shape conformability deteriorates. Can be prevented.
According to the mask described in (5) above, the pleats can be easily manufactured by temporarily fixing, and the number of the temporary welded portions is less than the number of the welded portions, so that the shape weldability is improved by the temporary welded portions. Inhibition can be suppressed.
According to the mask described in the above (6), it is possible to suppress deterioration in shape conformability due to the temporary welded portion by causing at least a part of the temporary welded portion to overlap the welded portion.
According to the mask described in the above (7), it is possible to suppress deterioration in shape conformability due to the temporary welded portion by setting the minimum interval between the temporary welded portions to be larger than the interval between the welded portions.
According to the mask described in (8) above, in general, the interval between the longitudinal welded portion and the lateral welded portion is aligned, and the shape conformability is improved by deliberately increasing the interval between the longitudinal welded portions. Can do.
According to the mask described in (9) above, the adhesion between the side of the mask body and the face can be further improved, and the entry of fine particles into the mask can be further suppressed.
According to the mask as described in said (10), the adhesiveness of the lower end part of a mask main body and a face can be improved further, and the penetration | invasion of microparticles | fine-particles into a mask can be suppressed further.

FIG. 1 is a perspective view of the inside of a mask according to the first embodiment of the present invention. FIG. 2 is an enlarged view of an end portion in the horizontal direction when the mask of the first embodiment is viewed from the inside. FIG. 3 is a perspective view of the inside of the mask according to the second embodiment of the present invention. FIG. 4 is an enlarged view of an end portion in the horizontal direction when the mask of the second embodiment is viewed from the inside. FIG. 5 is a perspective view of the inside of the mask according to the third embodiment of the present invention. FIG. 6 is an enlarged view of the end portion in the horizontal direction when the mask of the third embodiment is viewed from the inside. FIG. 7A is a diagram showing a photograph of the mask of Example 1, and FIG. 7B is a schematic diagram showing an enlarged lateral end portion of the mask of FIG. 7A. FIG. 8A is a diagram showing a photograph of the mask of Example 2, and FIG. 8B is a schematic diagram showing an enlarged end portion in the horizontal direction of the mask of FIG. 8A. FIG. 9A is a view showing a photograph of the mask of Comparative Example 1, and FIG. 9B is a schematic view showing an enlarged lateral end portion of the mask of FIG. 9A. FIG. 10A is a view showing a photograph of the mask of Comparative Example 2, and FIG. 10B is a schematic view showing an enlarged lateral end portion of the mask of FIG. 10A. FIG. 11A is a view showing a photograph of the mask of Comparative Example 3, and FIG. 11B is a schematic view showing an enlarged lateral end portion of the mask of FIG. 11A. FIG. 12A is a diagram showing a photograph of the mask of Comparative Example 4, and FIG. 12B is a schematic diagram showing an enlarged end portion in the horizontal direction of the mask of FIG. FIG. 13A is a view showing a photograph of the mask of Comparative Example 5, and FIG. 13B is a schematic view showing an enlarged lateral end portion of the mask of FIG. 13A. FIG. 14 is a diagram illustrating a state where the wearer actually wears the mask according to the first embodiment. FIG. 15 is a diagram showing a state in which the wearer actually wears the mask of Comparative Example 2.

Hereinafter, embodiments of the mask of the present invention will be described with reference to the drawings.
<First Embodiment>
A mask according to a first embodiment of the present invention is shown in FIGS. FIG. 1 is a perspective view showing a state in which the center portion is vertically expanded and curved in the width direction so that the mask is actually worn, and is viewed from the side in contact with the wearer's face (the inside of the mask). It is. FIG. 2 is an enlarged view of a lateral end portion inside the mask.

  As shown in FIGS. 1 and 2, the mask 1 according to the first embodiment includes a mask body 10 that covers the wearer's nose and mouth when worn, and a width direction of the mask body 10 (hereinafter referred to as a lateral direction). Ear straps 12 serving as ear hooks formed at both ends are provided.

  The material constituting the mask body 10 is preferably a non-woven fabric manufactured using polyester fiber, polypropylene fiber, polyethylene fiber, nylon fiber, cotton fiber or the like as a raw material. The ear strap 12 is made of a rubber material and a covering material covering the rubber material. As the material constituting the ear strap 12, the rubber material is preferably made of polyurethane fiber, thermoplastic elastomer or the like as a raw material. The covering material is preferably produced from polyester fiber, nylon fiber or the like.

  The mask 1 of the present embodiment is of a so-called “pleated type”, and the mask body 10 is constituted by a plurality of non-woven fabrics stacked, and a plurality (four in the figure) of lateral folds 14 are formed. As a result, the mask body 10 partially overlaps to form a plurality of pleats 15. 1 and 2, the mask body 10 is illustrated as being composed of a single nonwoven fabric, but in actuality, a plurality of nonwoven fabrics are overlapped (hereinafter, FIGS. 3 to 6). The same applies to the above).

  The upper end portion 10a of the mask body 10 is folded back inside the mask body 10 over the entire horizontal direction. The folded portion is formed in two rows linearly along the horizontal direction by heat sealing, and a mesh seal 17 formed in a net shape so as to extend linearly along the horizontal direction by heat sealing. The horizontal welded portions 16a and 16b are fixed. The laterally welded portions 16a and 16b are formed in parallel at equal intervals, and a part of the laterally welded portion 16a located at the upper portion overlaps the mesh seal 17 formed in a mesh shape by heat sealing. As heat sealing (welding), in addition to heat welding, high frequency or ultrasonic waves may be used. In this specification, the mesh seal means that each row of welding points arranged in two rows is welded at an equal pitch (interval), and the row adjacent to one row is at the same pitch at a position half the pitch. It is welded and means a seal portion formed by providing two or more sets of two rows as one set.

  A bag-shaped accommodation space 18 is formed in the upper end portion 10a of the mask body 10 inside the one end side of the mask body 10 by the laterally welded portions 16a and 16b. A nose fit member 20 that is deformed in accordance with the shape is accommodated. The nose fit member 20 is preferably in close contact with the shape of the nose and can maintain the shape, and may be made of resin such as polyester, or may be metallic such as iron or aluminum.

  The lower end portion 10b of the mask main body 10 is folded back inside the mask main body 10 over the entire horizontal direction, and is fixed by a mesh seal 24 so as to extend linearly along the horizontal direction. Further, the end portion of the ear strap 12 is also fixed to the corner end portion of the mask main body 10 by a mesh seal 25.

  The plurality of pleats 15 are stopped by a plurality of welded portions 22 formed by heat sealing on both lateral sides of the mask main body 10. The welded portion 22 and the mask main body 10 are linearly formed at equal intervals in the direction orthogonal to the horizontal direction (hereinafter referred to as the vertical direction) on both sides in the horizontal direction.

  Here, as shown in FIG. 2, the distance d1 between the welded portions 22 adjacent in the vertical direction is formed to be at least 3 mm, preferably 4 mm, and more preferably 5 mm. The interval d1 between the weld portions 22 adjacent in the vertical direction is formed to be larger than the interval d0 between the horizontal weld portions adjacent in the horizontal direction of the horizontal weld portions 16a and 16b. It is preferable that the welding part 22 is formed in 1 row. Further, the center-to-center distance between the adjacent welded portions 22 is preferably 5 mm or more, more preferably 6 mm or more, and further preferably 7 mm or more.

  In general, when forming the welded portion 22, a mesh seal is used in the same manner as the mesh seals 17 and 24, or even if the mesh seal is not used, the interval d1 between the adjacent welded portions 22 is welded in the lateral direction. In the present embodiment, the mesh seal is not adopted, and the distance d1 between the adjacent welded portions 22 is deliberately wide, particularly 3 mm or more, in order to form the same as the distance d0 between the portions 16a and 16b. By securing the interval between the adjacent welded portions 22, the end portions in the mask lateral direction are softened. The welded portion 22 itself is hard because it has once melted and hardened, but the number of the welded portions 22 is reduced so as to increase the softness of the lateral end portion of the mask. As described above, by softening the lateral end of the mask, the conformability of the mask body 10 to the wearer's face can be improved. Note that the upper limit value of the interval d1 between the adjacent welded portions 22 is not particularly limited as long as it is within a range where the pleats 15 can be stopped.

  When the wearer wears the mask 1, the two ear straps 12 of the mask 1 are wound around the wearer's ears, and the nose fitting member 20 is bent in accordance with the shape of the nasal bridge to Wear while keeping 10a in close contact with the face. When the mask 1 is worn, the pleats 15 of the mask main body 10 are stretched at the center, thereby covering the wearer's nose and mouth.

  Although both ends of the mask body 10 in the horizontal direction receive tension from the ear straps 12, as described above, in the welded portions 22 formed on both sides of the mask body 10 in the lateral direction, the interval between the adjacent welded portions 22 is 3 mm. Since the above is ensured, the both ends of the mask body 10 in the horizontal direction are likely to follow the shape of the wearer's face.

  As described above, in the mask 1 of the present embodiment, the vertical interval between the welded portions 22 formed on both sides of the mask body 10 in the horizontal direction is wide, and the interval between the adjacent welded portions 22 is 3 mm or longer. Since it is formed in a straight line in the direction, the familiarity of the shape of the mask body 10 with respect to the wearer's face is good, the gap between the side of the mask body 10 and the face is reduced, and the adhesion is increased. Intrusion of fine particles can be effectively suppressed.

  Furthermore, in the mask 1 of this embodiment, the mask main body 10 may incorporate a collection filter that prevents entry of fine particles. By incorporating the collection filter, it is possible to more effectively suppress the entry of fine particles into the mask.

Second Embodiment
Next, a second embodiment of the present invention will be described. 3 and 4 show a mask according to the second embodiment of the present invention. FIG. 3 is a perspective view of the inside of the mask according to the second embodiment. FIG. 4 is an enlarged view of a lateral end portion inside the mask. In the mask 2 of the second embodiment shown in FIGS. 3 and 4, the same components as those of the mask 1 of the first embodiment shown in FIGS.

  As shown in FIGS. 3 and 4, the mask 2 of the second embodiment is the side of the mask 1 of the first embodiment that is provided on both sides of the mask body 10 so as to cover both lateral ends. Tapes 30 and 30 are provided.

  Moreover, in the mask 2 of 2nd Embodiment, as shown in FIG. 4, the some pleat 15 formed so that a part of nonwoven fabric may overlap may be temporarily fixed by the temporary welding part 36 in a horizontal direction edge part, respectively. ing. The temporary welding portions 36 are formed side by side in the horizontal direction at each position in the vertical direction where the pleats 15 are temporarily fixed. By temporarily fixing the pleats 15 in this way, the pleats 15 can be easily manufactured.

  The side tapes 30, 30 are preferably manufactured using polyester fiber, polypropylene fiber, polyethylene fiber, nylon fiber, or the like as raw materials. The side tapes 30, 30 are arranged at both lateral ends of the mask body 10 from the front surface to the rear surface of the mask body 10. In a state of being folded back toward the end, it is attached so as to cover the end of the temporarily fixed pleat 15. The side tapes 30 and 30 are welded so as to overlap the mask main body 10 by the welded portions 22 formed in a row in the vertical direction.

  In particular, when the material of the side tapes 30 and 30 is the same as that of the ear straps 12 and the ear straps 12 are attached to the side tapes 30 and 30 by heat sealing, the ear straps 12 are attached to the mask body 10 by melting the same materials. On the other hand, it can be fixed more firmly. When the ear strap 12 is made of a rubber material and a covering material, the side tapes 30 and 30 are preferably made of the same material as the covering material.

  The temporary welding part 36 is arrange | positioned so that it may form outside in the horizontal direction rather than the welding part 22. FIG. Also in the present embodiment, the welded portion 22 does not employ a mesh seal, and further has a wider distance d1 between the adjacent welded portions 22 than the distance d0 between the lateral welded portions 16a and 16b so as to be particularly 3 mm or more. Is also the same as the mask 1 of the first embodiment. Moreover, the number of the temporary welding parts 36 is formed to be smaller than the number of the welding parts 22. Thus, by making the number of the temporary welding parts 36 smaller than the number of the welding parts 22, it is possible to suppress the shape conformability from being inhibited by the temporary welding parts 36. The temporary welding portions 36 do not have to be formed side by side in the horizontal direction, and may be formed in a row in the vertical direction.

  Further, in order to prevent the shape conformability from being hindered by the temporary welding portion 36, it is preferable to match the positions of the temporary welding portion 36 and the welding portion 22 in the vertical direction as much as possible. Therefore, as shown in FIG. 4, at least a part of the temporary welding portion 36 is formed so as to overlap the welding portion 22 in the vertical direction.

  Further, as shown in FIG. 4, the distances d <b> 2 and d <b> 3 between the adjacent temporary welded portions 36 in the vertical direction are formed to be larger than the distance between the welded portions 22. The distances d2 and d3 between the temporary welded portions 36 may be the same or larger, but by forming the minimum distance between adjacent temporary welded portions 36 to be larger than the distance between the welded portions 22, It is possible to suppress the shape conformability from being deteriorated by the portion 36.

  As described above, in the mask 2 of the present embodiment, in addition to the effects described in the mask 1 of the first embodiment, the mask body 10 is covered with the side tapes 30 and 30 at both lateral ends of the mask body 10. The fluff of the cut surface can be suppressed and the touch can be improved. Furthermore, by using the same material as the ear strap 12 for the side tapes 30 and 30, the ear strap 12 can be more firmly fixed to the mask body 10. In addition, the provisional weld portion 36 facilitates the manufacture of the pleat 15. Furthermore, by making the minimum interval of the temporary welded portion 36 larger than the interval of the welded portion 22, it is possible to suppress the shape conformability from being deteriorated by the temporary welded portion 36.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. 5 and 6 show a mask according to the third embodiment of the present invention. FIG. 5 is a perspective view of the inside of the mask according to the third embodiment. FIG. 6 is an enlarged view of a lateral end portion inside the mask. Moreover, in the mask 3 of 3rd Embodiment shown in FIG.5 and FIG.6, about the structure same as the mask 2 of 2nd Embodiment shown in FIG.3, 4, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIGS. 5 and 6, the mask 3 of the third embodiment covers the gap between the wearer's face and the mask body 10 at both lateral ends of the mask body 10 in the mask 2 of the second embodiment. The side block 32, 32 or the lower end of the mask body 10 is provided with a chin receiving pocket 34 for receiving the wearer's chin. 5 and 6, both the side blocks 32 and 32 and the jaw receiving pocket 34 are provided, but a mask provided with either one corresponds to this embodiment.

The side blocks 32, 32 are formed by sandwiching one end of a side barrier tape 31 formed in a wide band shape between the mask main body 10 and the side tape 30, and the jaw storing pocket 34 is the lower end of the mask main body 10. The portion 10b is formed by being largely folded inward. The side block 32 (side barrier tape 31) is positioned above the jaw receiving pocket 34, that is, on the side that contacts the wearer's face (inside the mask).
The side barrier tape 31 can more effectively suppress the entry of fine particles into the mask by using a non-breathable material such as a polyethylene terephthalate film, a polypropylene film, or a polyethylene film.

  Further, in the mask 3 of the third embodiment, as shown in FIG. 6, the portion where the lower end portion 10 b of the mask body 10 is folded and the one end of the side barrier tape 31 are overlapped and sandwiched between the side tapes 30. The weld portion 22 is formed by heat-sealing from the side tape 30 together. The side barrier tape 31 has an upper end fixed by a mesh seal 17 and a lower end fixed by a mesh seal 25. A mesh seal 25 for attaching the ear strap 12 is also formed from above.

  In this way, the side blocks 32 and 32 are formed by fixing the right (or left) end by the welded portion 22 and fixing the upper and lower ends by the mesh seals 17 and 24, respectively. Further, the jaw storing pocket 34 is formed in a pocket shape by fixing both left and right ends by the welded portion 22 and fixing the lower end by the mesh seal 24.

  In the mask 3 of the third embodiment, the left and right side blocks 32, 32 stand up with respect to the mask body 10 by extending the pleats 15 of the mask body 10 or housing the wearer's chin in the jaw housing pocket 34. . Thereby, when the mask is mounted, the gap between the mask body 10 and the face is completely covered, the adhesion can be further improved, and the entry of fine particles into the mask can be further suppressed.

  Also in this embodiment, the welded portion 22 does not employ a mesh seal, and further, the interval d1 between adjacent welded portions 22 is wide, particularly, the interval between the lateral welded portions 16a and 16b so as to be 3 mm or more. It is the same as the mask 1 of the first embodiment in that it is formed wider than d0. As described above, in the mask 3 of the present embodiment, in addition to the effects described in the mask 2 of the second embodiment, the mask body 10 and the face are provided by including the side blocks 32 and 32 and the jaw storage pocket 34. The gap is completely covered, the adhesion can be further improved, and the intrusion of fine particles into the mask can be further suppressed.

  Hereinafter, in order to explain the effect of the mask of the present invention, the mask of the example of the present invention and the mask of the comparative example will be described with reference to FIGS.

  FIGS. 7 to 13 are (a) a photograph of a mask taken from the inside or outside, and (b) a schematic view showing an enlarged lateral end of the mask of (a).

  FIG. 7 shows a mask of Example 1 of the present invention, which is a mask having almost the same form as the mask shown in FIGS. 3 and 4 provided with a side tape as in the second embodiment. FIG. 8 shows a mask according to Example 2 of the present invention, as shown in FIGS. 5 and 6, which includes a side tape, a side block, and a jaw receiving pocket as in the third embodiment. The mask has almost the same shape as the mask. 9 is a product of Company A (hereinafter referred to as Comparative Example 1), FIG. 10 is a product of Company B (hereinafter referred to as Comparative Example 2), FIG. 11 is a product of Company C (hereinafter referred to as Comparative Example 3), and FIG. FIG. 13 shows a product 2 of C company (hereinafter referred to as Comparative Example 4), and FIG. 13 shows a product of Company D (hereinafter referred to as Comparative Example 5), both of which are commercially available masks.

  The mask of Example 1 of the present invention shown in FIG. 7 and the mask of Example 2 of the present invention shown in FIG. 8 are in order of polypropylene nonwoven fabric, polypropylene nonwoven fabric, collection filter, and polypropylene nonwoven fabric from the outside to the inside. The welded portions on both sides in the horizontal direction of the mask body thus formed were formed in a straight line in a row at equal intervals in the vertical direction, and the interval d1 between adjacent welded portions in the vertical direction was about 5 mm. Further, the distance d1 and the like in the commercial mask of the comparative example were measured by applying a ruler to the actual mask.

  In the mask of Comparative Example 1 shown in FIG. 9, a plurality of pleats are formed on the mask body, and in addition to the nose fit member, a sponge that can be deformed in accordance with the shape of the mask wearer's nose inside the mask body. Is provided. Also, two pleats are formed in the vertical direction so that the lower end of the mask body is shorter than the upper end, and the welded portions on both sides in the horizontal direction of the mask main body are viewed from above by the vertical pleats. Although it is curved inwardly downward, it is linearly formed in one row at equal intervals in the vertical direction, and the interval d1 between adjacent welded portions in the vertical direction is about 2 mm.

  In the mask of Comparative Example 2 shown in FIG. 10, a plurality of pleats are formed on the mask body, and a nose fit member is provided on the upper end. The welded portions on both sides in the horizontal direction of the mask main body are formed in a substantially circular arc shape so that the central portion opens in the horizontal direction with respect to the upper end portion and the lower end portion in a line at equal intervals. A distance d1 between adjacent welds in the longitudinal direction was 2 mm.

  In Comparative Example 3 shown in FIG. 11, a plurality of pleats are formed on the mask body, and a nose fit member is provided on the upper end. The welded portions on both lateral sides of the mask body are located on the inner side in the lateral direction and the first welded portion that stops the pleats, and on the outer side in the lateral direction, the ear hooking portion is fastened to the mask body over the entire length of the lateral ends. It consists of two welds. The first welded portions are formed in a straight line in the longitudinal direction, and the interval d11 between adjacent welded portions is about 1.5 mm, d12 is about 6 mm, and both intervals are provided alternately. The second welded portion was formed in a straight line in one row at equal intervals in the vertical direction, and the interval d13 between adjacent welded portions in the vertical direction was about 1 mm.

  In the comparative example 4 shown in FIG. 12, the pleat is not formed in the mask main body, the central welding part is formed along the vertical direction in the horizontal center of the mask main body, and the central welding part is forward when the mask is worn. To protrude. A fitting member that fits the cheek is provided at the upper end of the mask body. A welded portion is formed by a mesh seal at the lateral end of the mask body to attach the ear hook to the mask body over the entire length of the lateral end. The mesh seal has 3.5 sets, that is, seven rows of welded portions, and the distance between the pitches of each row, that is, the interval d1 between the welded portions adjacent in the vertical direction is 1 mm.

  In Comparative Example 5 shown in FIG. 13, a plurality of pleats are formed on the mask body, the lateral ends of the mask body are covered with side tape, and the ear straps are fastened to the side tape. Temporary welds are formed at both lateral ends of the mask body covered with the side tape. Moreover, the side tape and the mask main body are overlapped and welded to each other on the inner side in the horizontal direction of the temporary welded portion by the welded portion. The welded portions were linearly formed in two rows at equal intervals in the vertical direction, and the interval d1 between adjacent welded portions in the vertical direction was about 0.5 mm.

For the seven types of masks of Examples 1 and 2 and Comparative Examples 1 to 5 having the above-described configuration (both use normal sizes), the JIS standard (JIS T 8159: 2006 Respiratory protection device leakage rate test method) However, a mask leak rate test was conducted based on the number of subjects in each case (2 adult males). In this mask leak rate test, the subject puts a mask into a chamber (test room) filled with NaCl, and performs actions such as standing still, turning his face left and right, moving up and down, and speaking. Each time, the concentration of NaCl in the mask is measured to see how much NaCl is sucked into the mask. If the suction of NaCl into the mask is completely blocked, the NaCl concentration in the mask is 0 and the leakage rate is 0%. If the NaCl is completely sucked into the mask, the NaCl concentration in the mask is the chamber. The leakage rate is 100%. The average of all these is the final leak rate. The measurement conditions were NaCl particles: 0.06 to 0.1 μm and average concentration: 8 ± 4 mg / m ³ . The results of this leak rate test are shown in Table 1 together with the distance d1 and the like. In addition, the numerical value in Table 1 is an average value of two test subjects.

  Thus, the leak rates of Examples 1 and 2 are much lower than the leak rates of Comparative Examples 1 to 5. This is because, in the first and second embodiments, the welded portions are linearly formed at equal intervals, and the distance between the adjacent welded portions is formed to be wide 5 mm, so that the mask lateral end portion becomes soft. The mask body has good shape familiarity to the wearer's face, the gap between the side of the mask body and the face is reduced, the adhesion is increased, and the intrusion of NaCl into the mask can be effectively suppressed. It is thought that.

  In addition, the leakage rate of the mask of Example 2 was improved compared to the mask of Example 1 because the gap between the mask body and the face was completely covered by the side block and the jaw storing pocket, and the contact was tight. It is considered that the property was increased and the intrusion of NaCl into the mask could be further suppressed.

  Further, for the masks of Example 1 and Example 2, the same mask leakage rate test as described above was performed using 8 adult males as subjects. The average value of the leak rate of the mask of Example 1 by a total of 10 people, including the result and the leak rate of 2 people listed in Table 1, was 29.7%, and the average value of the leak rate of the mask of Example 2 was 19 The leakage rate was very low even when the number of subjects was increased. From the above, it has been found that the shape familiarity of the mask of the present invention can sufficiently cope with differences in the size and shape of the wearer's face.

  Next, FIG. 14 and FIG. 15 schematically show photographs comparing how much gap is generated on the side portion of the mask main body with the mask actually mounted. FIG. 14 is a diagram schematically showing a state in which the wearer actually wears the mask of Example 1 (FIG. 7) of the present invention. FIG. 15 is a diagram schematically showing a state in which the wearer actually wears the mask of Comparative Example 2 (FIG. 10).

  As shown in FIG. 14, in the mask of Example 1 of the present invention, the side portion A of the mask body is familiar along the face surface, fits closely to the wearer's face, and almost no gap is seen. There wasn't. On the other hand, in the mask of Comparative Example 2 in FIG. 15, the side B of the mask body was bent at two locations B1 and B2, and a gap was formed at that portion. From the above, it is clear that the mask of the present invention has good shape conformability to the face of the wearer of the mask body.

  As described above, the mask of the present invention closely adheres to the wearer's face and suppresses the formation of gaps at the side of the mask body, and highly suppresses the entry of fine particles into the mask. Is possible.

  Although the mask of the present invention has been described in detail above, the present invention is not limited to the above examples, and various improvements and modifications may be made without departing from the spirit of the present invention. is there.

  This application is based on Japanese Patent Application No. 2013-248014 filed on Nov. 29, 2013, the contents of which are incorporated herein by reference.

DESCRIPTION OF SYMBOLS 1 Mask 2 Mask 3 Mask 10 Mask main body 12 Ear string 14 Fold 15 Fleet 16a, 16b Lateral welding part 18 Storage space 20 Nose fitting member 22 Welding part 17, 24, 25 Mesh seal 30 Side tape 31 Side barrier tape 32 Side Block 34 Jaw storage pocket 36 Temporary weld

Claims (10)

A mask body, comprising a mask body and ear hook portions formed at both lateral ends of the mask body, wherein a part of the mask body overlaps to form a plurality of pleats,
The plurality of pleats are stopped by welds formed by heat sealing,
The welded portion is formed in a straight line at equal intervals in the vertical direction on both sides in the horizontal direction of the mask body,
A mask characterized in that an interval between adjacent welds is 3 mm or more.   The mask according to claim 1, wherein both lateral ends of the mask body are covered with side tape. The side tape is made of the same material as the ear hook,
The mask according to claim 2, wherein the ear hook is attached to the side tape.   4. The mask according to claim 2, wherein the welded portion is formed by superposing and heat-sealing the side tape and the mask main body. 5. Temporarily welded portions, in which the plurality of pleats are temporarily fixed by heat sealing, are formed at both lateral ends of the mask main body covered with the side tape, outside in the lateral direction of the mask main body. Has been
5. The mask according to claim 2, wherein the number of the temporary welded portions in the vertical direction is smaller than the number of the welded portions.   The mask according to claim 5, wherein at least a part of the temporary welded portion overlaps the welded portion in the longitudinal direction.   The mask according to claim 5 or 6, wherein a minimum interval between the adjacent temporary welding portions in the longitudinal direction is larger than an interval between the welding portions. The upper end portion and the lower end portion of the mask body are formed with a transverse weld portion formed by heat sealing, extending in the transverse direction of the mask body,
The mask according to claim 1, wherein an interval between the weld portions in the vertical direction is larger than an interval between the horizontal weld portions in the horizontal direction.   The mask main body is provided with side blocks so as to cover a gap between the face and the mask main body at both lateral ends of the mask main body on the side in contact with the wearer's face. Item 10. The mask according to any one of Items 1 to 8. The said mask main body is provided with the jaw part accommodation pocket which accommodates the said wearer's jaw part in the lower end part of the side contact | abutted to the wearer's face of the said mask body. The mask of any one of these.

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