JP2023003493A - mask - Google Patents

Abstract

To provide a novel mask that satisfies both collection performance and breathing easiness.SOLUTION: A mask has a body part, having an inner mesh layer 1 facing the face including the mouth and an outer mesh layer 2 laminated outside of the inner mesh layer 1, and ear hooking parts 3 arranged on both left and right ends of the body part. Mesh structures of the inner mesh layer 1 and the outer mesh layer 2 are different. The body part is shaped in such a way that, when attached to the face including the mouth, the outer peripheral part of the body part fits to the face and that the center part of the inner mesh layer 1 that faces at least the lips is arranged to keep a proper distance from the face. The inner mesh layer 1 and the outer mesh layer 2 have predetermined collection capacity as well as ventilation resistance.SELECTED DRAWING: Figure 1

Description

Application for application of Article 30, Paragraph 2 of the Patent Act (1) April 13, 2021 Onyone Co., Ltd.'s own website (https://www.onyone.co.jp/other/hybrid-type-mesh- (2) April 20, 2021 Published on the website of “PR TIMES Co., Ltd.” (https://prtimes.jp/main/html/rd/p/000000004.000070350.html) (3) Released in "Niigata Daily" on June 16, 2021

The present invention relates to masks.

Patent Document 1 describes a mask with improved antiviral, antibacterial, and antibacterial effects. Specifically, it discloses a mask in which two sheet bodies having a mesh structure are laminated and the mesh structure of one sheet body is rougher than that of the other sheet body.

Utility Model Registration No. 3226529

By the way, in general, a mask with a high collection performance of viruses, bacteria, etc. has a large ventilation resistance (pressure loss) and is difficult to breathe.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a novel mask that achieves both collection performance and ease of breathing.

The gist of the present invention will be described with reference to the accompanying drawings.

A body portion having an inner mesh layer 1 facing the face including the mouth, an outer mesh layer 2 laminated on the outside of the inner mesh layer 1, and ear hook portions 3 provided at both left and right ends of the body portion. and wherein the inner mesh layer 1 and the outer mesh layer 2 have different mesh structures,
When the main body part is worn on the face including the mouth, the outer peripheral part of the main body part is in contact with the face, and at least the central part of the inner mesh layer 1 facing the lips is separated from the face through an appropriate space. is a shape that is arranged in the
The inner mesh layer 1 and the outer mesh layer 2, in a state in which the inner mesh layer 1 and the outer mesh layer 2 are laminated, have a collection efficiency of 0.1 μm particles at the time of charging of 70% or more, and The mask is characterized by being composed of a material having a ventilation resistance of 10 Pa or less.

The mask according to claim 1 is characterized in that one of the inner mesh layer 1 and the outer mesh layer 2 is made of a nylon material and the other is made of a polyester material.

Further, in the mask according to any one of claims 1 and 2, the inner mesh layer 1 and the outer mesh layer 2 are formed in a state in which the inner mesh layer 1 and the outer mesh layer 2 are laminated, and at the time of charging The mask is characterized by having a collection efficiency of 93% or more for 0.1 μm particles of the mask, and being made of a material having airflow resistance of 0 Pa on the front and back sides.

Further, the mask according to any one of claims 1 to 3, wherein the inner mesh layer 1 and the outer mesh layer 2 have different mesh hole density.

Further, in the mask according to any one of claims 1 to 4, the mask is characterized in that the inner mesh layer 1 and the outer mesh layer 2 are knitted differently.

Further, in the mask according to any one of claims 1 to 5, the area of each mesh hole of the inner mesh layer 1 is 0.040 to 0.060 mm ² , and the area of the mesh hole of the outer mesh layer 2 is It relates to a mask characterized by 0.140 to 0.160 mm ² per piece.

In addition, in the mask according to any one of claims 1 to 6, the outer mesh layer 2 is composed of a left half and a right half, and the upper central end point of each half is positioned below the nasal bone. , the outer end point of the upper side is set to be positioned below the cheekbone, and the central side end point of the lower side is set to be positioned at the tip of the chin.

Further, in the mask according to any one of claims 1 to 7, a storage part 5 capable of storing the inner mask 4 is provided between the inner mesh layer 1 and the outer mesh layer 2. It relates to a mask characterized by

Further, in the mask according to claim 8, the storage portion 5 is opened upward, and a locking mechanism that detachably locks a part of the inner mesh layer 1 and the outer mesh layer 2 forming the opening. The present invention relates to a mask characterized by having a portion.

Since the present invention is configured as described above, it becomes a novel mask that achieves both collection performance and ease of breathing.

It is a schematic explanatory perspective view of a present Example. FIG. 2 is a schematic explanatory perspective view of an inner mask 4; It is a schematic explanatory view seen from the back side of the present embodiment. It is a schematic explanatory drawing at the time of mounting|wearing of a present Example. 1 is an electron micrograph of (a) inner mesh layer 1 and (b) outer mesh layer 2. FIG. It is a table|surface which shows an experimental result.

A preferred embodiment of the present invention will be briefly described with reference to the drawings showing the operation of the present invention.

The ear hooks 3 are fitted to the ears and worn on the face so as to cover the mouth with the main body.

At this time, the main body part is arranged between the lips and the inner mesh layer 1 with a predetermined space therebetween, and the space allows filtration by the main body part (filter) to be performed not locally but over a wide range of the main body part. becomes, and viruses, bacteria, etc. can be collected efficiently.

In addition, since the inner mesh layer 1 and the outer mesh layer 2 have different mesh structures and the presence of the space, air turbulence is likely to occur during breathing, and Brownian motion of viruses, bacteria, etc. It becomes easy to be caught, and the collection is efficiently performed also from this point.

Furthermore, since the main body is made of a material having a predetermined collection efficiency and ventilation resistance, it not only exhibits good collection performance, but is also easy to breathe and less stuffy, so it can be used for a long time. It will be comfortable to wear.

A specific embodiment of the present invention will be described with reference to the drawings.

This embodiment comprises a main body having an inner mesh layer 1 facing the face including the mouth, and an outer mesh layer 2 laminated on the outside of the inner mesh layer 1, and the right and left ends of the main body. The inner mesh layer 1 and the outer mesh layer 2 have different mesh structures.

Specifically, when the main body part is worn on the face including the mouth, the outer peripheral part of the main body part is in contact with the face, and at least the central part of the inner mesh layer 1 facing the lips is from the face. The inner mesh layer 1 and the outer mesh layer 2 are arranged with an appropriate space interposed therebetween. The collection efficiency is 70% or more, and the front and back ventilation resistance is 10 Pa or less.

Each part will be specifically described.

The main body has a two-layer structure of an outer mesh layer 2 and an inner mesh layer 1, and is large enough to cover at least the wearer's nostrils and mouth.

The outer mesh layer 2 and the inner mesh layer 1 are each composed of two left and right halves, and the two halves are stitched together at the center to form a three-dimensional shape (see Fig. 1). .

The inner mesh layer 1 is integrated with the back side of the outer mesh layer 2 by stitching the outer periphery (left and right edges and lower edge) except for the upper edge.

Accordingly, a storage portion 5 (pocket) capable of storing the inner mask 4 is formed between the inner mesh layer 1 and the outer mesh layer 2 (see FIGS. 2 and 3). As described above, the upper edge of the inner mesh layer 1 is not sewn, so the storage portion 5 is open upward.

In addition, it is also possible to provide a hook-and-loop fastener or the like for detachably locking a part of the inner mesh layer 1 and the outer mesh layer 2 forming the upward opening of the storage part 5 . In this case, the adhesion between the inner mesh layer 1 and the outer mesh layer 2 is improved.

By storing the inner mask 4 in the storage portion 5 to form a three-layer (or more) structure, the efficiency of capturing viruses, bacteria, etc. can be further improved. The inner mask 4 is made of, for example, a semiconductor fiber material, a bacteriostatic fiber material, or a combination of both. Examples of semiconductor fibers include carbon fibers and fibers kneaded with noble metals, and examples of bacteriostatic fibers include fibers fixed with a solvent by cross-linking. As with the mesh layer, the inner mask 4 is also integrated by stitching the left and right halves.

In addition, a wire-shaped shape memory resin (not shown) is provided in the upper edge of the outer mesh layer 2, and the upper edge can maintain a shape that can be in close contact with the face by curving along the peripheral surface of the nose. is configured as

The ear hooks 3 are loop-shaped strips provided at both left and right ends of the main body, and have elasticity in all directions. The ear hook portion 3 is made of, for example, an omni-directionally stretchable fiber material (a material having a knitted structure composed of stretchable fibers such as polyurethane fibers and polyester fibers, or composite yarns of these fibers and other fibers).

In this embodiment, the upper end portion of the ear hook portion 3 is sewn to the outer surface side of the left and right ends of the outer mesh layer 2 , and the lower end portion is sewn to the inner surface side of the left and right end portions of the outer mesh layer 2 . In addition, the ear hooking portion 3 is configured such that the end portions thereof are wider than the center portion (the loop portion that hooks on the ear) (the end portions are configured to gradually widen toward the main body). In addition, the lower end of the upper end of the ear hooking portion 3 is provided so as to be located outside (overlap with) the upper end of the lower end of the ear hooking portion 3 .

The inner mesh layer 1 is composed of a mesh fabric made of a nylon material (a cloth knitted or woven using nylon fibers). The outer mesh layer 2 is made of a mesh fabric made of polyester material (a cloth knitted or woven using polyester fibers). In this embodiment, the outer mesh layer 2 is made of polyester material and the inner mesh layer 1 is made of nylon material, but the outer mesh layer 2 is made of mesh fabric made of nylon material, and the inner mesh layer 1 is made of mesh fabric made of polyester material. You can

By using different materials for the inside and outside, especially nylon and polyester materials, it becomes easier to be charged, and the collection performance of bacteria and viruses is improved accordingly (Naturally charged without special work. do.). In addition, by employing the above material having excellent durability for the mesh layer, washing durability can be enhanced, and a configuration that can withstand repeated use can be obtained. In addition, various materials (chemical fiber cloth) can be used without being limited to the above materials.

As the inner mesh layer 1, one having a mesh hole (through hole) area of about 0.040 to 0.060 mm ² can be adopted, and as the outer mesh layer 2, one having a mesh hole area of 0.140 to 0.160 mm. ² can be adopted.

In this embodiment, the inner mesh layer 1 has a mesh hole area of about 0.056 mm ² per piece, and the outer mesh layer 2 has a mesh hole area of about 0.149 mm ² per piece. are doing. The area per mesh hole is obtained by averaging the area of the largest mesh hole in each image from the mesh structure images taken with an electron microscope at 10 locations on each mesh fabric. (See Figure 5).

The collection efficiency and ventilation resistance are achieved in a state in which the inner mesh layer 1 and the outer mesh layer 2 are laminated. Preferably, the collection efficiency during charging is 89% or higher, more preferably 93% or higher. Also, preferably, the ventilation resistance is 5 Pa or less, more preferably 0 Pa.

In this embodiment, the mesh structure of the outer mesh layer 2 is coarser than that of the inner mesh layer 1, but the opposite structure is also possible. By differentiating the area (roughness and fineness) of the holes between the inner mesh layer 1 and the outer mesh layer 2, ventilation during respiration is disturbed and turbulence is likely to occur.

In addition, the nylon mesh fabric and the polyester mesh fabric of the present embodiment are configured to have different gap shapes (mesh hole shapes) by changing the knitting method (weaving method) (the nylon mesh fabric has a square shape, and the polyester mesh fabric has a square shape. triangular.). This also makes it easier for turbulence to occur. The inner mesh layer 1 (nylon mesh fabric) and the outer mesh layer 2 (polyester mesh fabric) of this embodiment are tricot knitted.

When the main body is worn on the face, the upper central portion abuts the nose dorsum, the upper left end and the upper right end abut the cheekbones, and the lower central portion abuts the chin. It has a shape in which the main body bulges forward in an arch shape from the nostrils to the chin, and an appropriate space (buffer space) is formed between the vicinity of the mouth and the main body (inner mesh part). The appropriate space should be set to have a volume of 15 cm ³ or more, preferably 20 cm ³ or more.

By forming the appropriate space around the nostrils and the mouth, pressure is applied as uniformly as possible to a wide area of the main body during inhalation and exhalation, and the collection efficiency of the entire main body (filter) is increased. can be done. In addition, turbulence can be easily generated between the mask and the face, and the Brownian motion of viruses and the like can be promoted, thereby improving the collection performance accordingly. Even if the appropriate space is formed wide, leakage from the periphery of the main body is extremely small because the ventilation resistance of the main body is extremely small.

In order to form the appropriate space, the shape of the mask is designed as follows in this embodiment.

As shown in FIG. 4, the point A at the upper right end of the right half of the outer mesh layer 2, which is included in the upper central portion, is set to be positioned below the nasal bone. Also, the point B at the upper left end of the right half of the outer mesh layer 2, which is included in the upper left end portion, is set to be positioned below the cheekbone. Also, the point C at the lower central end included in the lower central portion is set to be positioned at the tip of the chin. This is because the position below the nasal bone and the position below the cheekbone are less likely to be linked to the movement of the mouth and jaw when worn, and the tip of the chin has minimal influence on the movement of the mouth and jaw.

The same applies to the left half body. That is, the upper central endpoint of each half is set to be positioned below the nasal bone, the upper outer endpoint is set to be positioned below the cheekbone, and the lower central endpoint is set to be positioned on the tip of the chin. is set to In the figure, reference numeral 6 denotes a buffer space.

Set the base angle connecting the above three points and drop it into each size. For example, the angle BAC is 64°±4°, the angle ABC is 74°±4°, and the angle BCA is 42°±4°.

Also, the upper edge AB is a curved line that curves downward so as not to affect the field of vision. In addition, the right edge AC is a curved line convex to the right in order to secure a buffer space. In addition, the left edge BC is a curved line convex to the left so as not to hinder the movement of the mouth. The angle (arch angle α) at which the imaginary extension lines of the straight portions on both ends of the left edge BC intersect is 142°±4°. By doing so, it is possible to create a wide buffer space in the horizontal direction as well.

As described above, when the body portion is worn on the face including the mouth, the outer peripheral portion of the body portion is in contact with the face, and at least the central portion of the inner mesh layer 1 facing the lips is the face. It is possible to form a shape that is arranged through an appropriate space.

Since this embodiment is configured as described above, when the ear hooks 3 are attached to the ears and the main body is worn on the face so as to cover the mouth, the main body is between the lips and the inner mesh layer 1. It is arranged through a predetermined space, and the space allows filtration by the main body (filter) to be performed not locally but over a wide range of the main body, so that viruses, bacteria, etc. can be efficiently collected.

In addition, since the inner mesh layer 1 and the outer mesh layer 2 have different mesh structures and the presence of the space, air turbulence is likely to occur during breathing, and Brownian motion of viruses, bacteria, etc. It becomes easy to be caught, and the collection is efficiently performed also from this point.

Furthermore, since the main body is made of a material having a predetermined collection efficiency and ventilation resistance, it not only exhibits good collection performance, but is also easy to breathe and less stuffy, so it can be used for a long time. It will be comfortable to wear.

Therefore, the present embodiment provides an unprecedented mask that achieves both collection performance and ease of breathing.

[Experimental example]
Experimental examples supporting the above effects will be described.

Following the ASTM F 2299 standard, test particles are continuously and stably supplied into a test chamber maintained in a clean environment, and the number of particles before and after (upstream and downstream) of the filter material is measured while aspirating at a constant flow rate. , collection efficiency (%) and ventilation resistance (Pa) were measured.

The particle size of the test particles was 0.1 μm. The airflow (flow rate) was set to 0.095m/sec.

The sample filter material is made by laminating two types of mesh selected from the following three types.

Polyester hard mesh... Yarn used: (F) polyester 20 denier x (M) polyester 20 denier x (B) polyester 150 denier Knitting machine gauge: 28G Knitting method: tricot Thickness: 0.39-0.41mm Porosity: Design value including allowance is 19-23% (Actual value 20.24%). In addition, (F) represents the surface portion of the fabric, (M) represents the middle layer portion of the fabric, and (B) represents the back portion of the fabric.

Polyester soft mesh: Yarn used: Polyester 44tex, Knitting machine gauge: 28G, Knitting method: Tricot, Thickness: 0.22-0.24mm, Porosity: Design value including allowance: 19-23% (Actual value: 20.75%).

Nylon soft mesh: Thread use: Nylon 33 tex, Knitting machine gauge: 32G, Knitting method: Tricot, Thickness: 0.28-0.30mm, Porosity: Design value including allowance: 14-18% (Actual value: 15.48%).

The thickness was measured using a digital thickness gauge. In addition, the actual measurement value of the porosity is calculated by image processing from images taken with a digital microscope at any target field of view (5276.84 μm (H) × 3956.55 μm (V)) at 3 locations. and calculated from the average value.

in particular,
Sample 1: Polyester hard mesh x nylon soft mesh (no washing)
Sample 2: Polyester hard mesh x Polyester soft mesh (no washing)
Sample 3: Polyester hard mesh x nylon soft mesh (after washing)
Sample 4: Polyester hard mesh x polyester soft mesh (after washing)
and

Then, an experiment was conducted on each sample in a "state in which static electricity was intentionally generated (charged state)" and a state in which static electricity was removed. In addition, experiments were conducted by changing the "front and back (layering order)". In addition, the "original", which was neither neutralized nor electrified, was also measured as a standard value.

In addition, washing was carried out by washing with water once in the standard mode of a domestic washing machine, and hanging to dry without detergent. Static electricity was generated (charged) by rubbing the vinyl chloride pipe against the test piece and electrifying it to 100 kV. The electrification was unified to 100KV. Moreover, static elimination was performed with an ionizer.

The number of tests was 5 measurements, and the average value of the 5 measurements was described as "average value AV". In addition, as a reference value, the average value excluding the maximum and minimum values is described as “average value TR”.

Experimental results are shown in FIG.

From FIG. 6, it was confirmed that all the samples had an airflow resistance of 0 pa and had a collection efficiency of 70% or more with respect to particles of 0.1 μm when charged. In particular, it was confirmed that sample 3 (polyester hard×nylon soft after washing, combination of outer mesh layer and inner mesh layer of this example) had a high collection efficiency after electrification.

REFERENCE SIGNS LIST 1 inner mesh layer 2 outer mesh layer 3 ear hook 4 inner mask 5 storage

Claims (9)

It has a main body portion having an inner mesh layer facing the face including the mouth, an outer mesh layer laminated on the outside of the inner mesh layer, and ear hook portions provided at both left and right ends of the main body portion. , a mask in which the inner mesh layer and the outer mesh layer have different mesh structures,
When the main body part is worn on the face including the mouth, the outer peripheral part of the main body part is in contact with the face, and at least the central part of the inner mesh layer facing the lips is separated from the face through an appropriate space. is the shape to be arranged,
The inner mesh layer and the outer mesh layer, in a state in which the inner mesh layer and the outer mesh layer are laminated, have a collection efficiency of 0.1 μm particles at the time of charging of 70% or more, and have airflow resistance on the front and back sides. A mask characterized by being composed of a material that is 10 Pa or less. 2. The mask of claim 1, wherein one of said inner mesh layer and said outer mesh layer is made of nylon material and the other is made of polyester material. 3. The mask according to claim 1, wherein the inner mesh layer and the outer mesh layer trap 0.1 μm particles during charging in a state in which the inner mesh layer and the outer mesh layer are laminated. A mask characterized by being composed of a material having a collection rate of 93% or more and a ventilation resistance of 0 Pa on the front and back. 4. The mask according to any one of claims 1 to 3, wherein said inner mesh layer and said outer mesh layer have different mesh hole density. A mask according to any one of claims 1 to 4, characterized in that the inner mesh layer and the outer mesh layer have different knitting methods. 6. The mask according to any one of claims 1 to 5, wherein the area of each mesh hole in the inner mesh layer is 0.040 to 0.060 mm ² , and the area of each mesh hole in the outer mesh layer is 0.140 mm 2 . A mask characterized by being ˜0.160 mm ² . 7. The mask according to any one of claims 1 to 6, wherein the outer mesh layer is composed of a left half and a right half, and the upper central side endpoint of each half is set to be located below the nasal bone. , the outer end point of the upper side is set to be positioned below the cheekbone, and the center side end point of the lower side is set to be positioned at the tip of the chin. 8. The mask according to any one of claims 1 to 7, wherein a storage section capable of storing the inner mask is provided between the inner mesh layer and the outer mesh layer. 9. The mask according to claim 8, wherein the storage portion is opened upward, and a locking portion is provided for detachably locking a part of the inner mesh layer and the outer mesh layer forming the opening. A mask characterized by:

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