CN108618234A - Dust mask - Google Patents
Dust mask Download PDFInfo
- Publication number
- CN108618234A CN108618234A CN201710157507.1A CN201710157507A CN108618234A CN 108618234 A CN108618234 A CN 108618234A CN 201710157507 A CN201710157507 A CN 201710157507A CN 108618234 A CN108618234 A CN 108618234A
- Authority
- CN
- China
- Prior art keywords
- filter body
- dust mask
- user
- nose
- pressing tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000428 dust Substances 0.000 title claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 14
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002131 composite material Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 210000001331 nose Anatomy 0.000 description 33
- 238000001914 filtration Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 239000002250 absorbent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 238000009941 weaving Methods 0.000 description 3
- 101100269850 Caenorhabditis elegans mask-1 gene Proteins 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- -1 dirt Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
- A41D13/1161—Means for fastening to the user's head
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
- A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
- A41D13/1153—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a hood
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The present invention relates to a kind of dust masks mainly used in industry spot.The present invention dust mask include：Solid type filter body；According to can the solid type orthoses that is provided at its inner portion of handling mode.In particular, in the present invention, the orthoses includes：Supporter, it is made of non-woven fabrics, and material is harder than the filter body, has loose gas permeability institutional framework, can be absorbed and be breathed the moisture generated by user；Bridge of the nose compression tool is affixed transversely to the supporter outer upper end, is covered by the filter body, can carry out bending adjusting.Dust mask according to the present invention can improve the adhesive force of user's nasal portion, be easy to handle the moisture that breathing generates.
Description
Technical Field
The present invention relates to a dust mask, and more particularly, to a dust mask which can be conveniently and effectively used by a user in an industrial field work.
Background
In general, since many harmful substances such as dust, dirt, and smoke are distributed in the air in an industrial site, workers use a closed dust mask that can cover the nose and the mouth. The dustproof mask is divided into two types, one type is that the dustproof mask can be semi-permanently used only by replacing the filter from the face body; the other is a filter which is made of the body of the crisp noodles and is discarded after being used for one time or more. In particular, the latter type is known in the industry as a "face-filtering" dust mask, and all dust masks described below are of this type.
In addition, the nose of the user has a shape with a sharply protruding curved structure in terms of human body structure, and the size and shape of each person are slightly different. Therefore, the dust mask produced by sizing cannot be tightly attached to the nose part of a user, and a space is easily generated. In this case, the harmful material is directly introduced into the respiratory organ through the space. To solve this problem, there are 2 options.
One solution is to attach a so-called "nose bridge pressing tool" to the dust mask. For example, fig. 1 shows a dust mask proposed in korean registered utility model publication No. 0179830, and this dust mask 1 includes: a generally hemispherical filter body 2; a headband 3 for wearing the filter body 2. On the upper side of the outer side surface of the filter body 2, an iron piece 4 is attached as a nose bridge pressing tool capable of bringing the filter body 2 into close contact with the nose bridge portion of the user.
However, the dust mask 1 of this type has problems that the ① iron piece 4 is not stable in appearance and structure, ② iron piece 4 attached to the filter body 2 causes a loss of the filtering function of the area of the part, and ③ filter body 2 is directly contacted with the breath of the user and hydration occurs rapidly, thereby lowering the filtering efficiency.
Another solution is to provide a so-called "orthosis" on the dust mask. For example, fig. 2 shows a dust mask proposed in japanese laid-open patent publication No. 2003-320041, in which a dust mask 5 is configured by inserting a mesh or mesh-shaped orthosis 7 molded with a plastic resin into a substantially hemispherical filter body 6, and a protruding curved portion 8 having a shape capable of contacting the bridge of the nose of a user is formed on the upper side of the orthosis 7.
Here, the orthosis 7 supports and maintains the circular shape of the filter body 6 while the bent portion 8 corresponds to the nose portion of the user, thereby helping the filter body 6 to be closely attached to the bridge of the nose portion of the user to some extent, however, this type of dust mask 5 has problems in that ④ causes considerable loss in filtering function corresponding to the contact area of the orthosis 7 and the filter body 6, ⑤ the bent portion 8 cannot flexibly correspond to the nose having various sizes and forms, thereby causing a reduction in the close attachment to the bridge of the nose, and ⑥ the filter body 6 is directly contacted with the breath of the user, and hydration rapidly occurs, thereby causing a sharp reduction in filtering efficiency and an increase in respiratory resistance.
Due to these problems, the first and second types of dust masks 1 and 5 are hardly used in actual industrial fields.
Prior art documents
Korean registered Utility model publication No. 0179830
Japanese laid-open patent publication No. 2003-320041
Japanese laid-open patent publication No. 2004-242905
Disclosure of Invention
Technical problem to be solved
The present invention has been made to solve the above-mentioned problems occurring in the prior art. An object of the present invention is to provide a dust mask in which a nose bridge pressing tool is configured by a so-called orthosis (shape retaining tool), the configuration of the pressing tool is stable, the orthosis or the pressing tool does not cause a loss of a filtering area of a filter body, the pressing tool can be deformed to flexibly cope with noses having different sizes and shapes, and the orthosis can prevent hydration of the filter body.
Means for solving the problems
The invention relates to a dust mask, the basic structure of which comprises: a filter body which is a three-dimensional type and wraps the periphery of the nose and the mouth of a user; a facing portion which is annular and whose outer peripheral edge is joined to an end of the edge of the filter body; and an orthosis which is a three-dimensional type and is detachably provided inside the filter body, and an edge end of the orthosis is inserted into a joint portion of the filter body and the facing portion.
In particular, here, the orthosis comprises: a support body which is made of water-absorbing non-woven fabric, is harder than the filter body, has a loose air-permeable tissue structure, is in direct contact with the breath of a user, and can absorb moisture generated by the breath; a nose bridge pressing tool made of a material capable of adjusting a curvature formed according to a shape of a nose bridge of a user, transversely attached to an outer upper end of the support body, and covered by the filter body to prevent the nose bridge pressing tool from being exposed to the outside.
Preferably, the pressing means may be a rectangular metal sheet or a composite sheet of transverse metal cores inserted into a flexible material.
Effects of the invention
According to the dust mask of the present invention, the support body of the orthosis is made of a nonwoven fabric and is detachably provided. Meanwhile, the extrusion tool is arranged at the upper end of the non-woven fabric support body in a mode of adjusting the curvature, and the extrusion tool is covered by the filter body. With this configuration, the dust mask can improve the stability and maintainability of the pressing tool, the adhesion to the bridge of the nose, and the like. In addition, according to the dust mask of the present invention, most of the moisture generated by the user's breath is absorbed and processed by the supporter of the orthosis before contacting the filter body, thereby having effects of improving dust capture efficiency of the dust mask, preventing rapid increase of inhalation resistance, prolonging the service life of the product, and the like.
Drawings
Fig. 1 is a schematic view of a conventional dust mask.
Fig. 2 is a schematic view of another conventional dust mask.
Fig. 3 is a perspective view of a dust mask according to the present invention.
Fig. 4 is an exploded view of fig. 3.
Fig. 5 is a sectional view taken along line a-a of fig. 3.
Fig. 6 is a state diagram for use of fig. 3.
Fig. 7 and 8 are schematic views illustrating a method of forming the orthosis shown in fig. 3, respectively.
Description of the reference numerals
10: the dust mask 11: filter body
12: a facing portion 13: orthosis
14: the headband 15: joint part
16: support body 17: v-shaped groove
18: pressing tool 19: main body
20: metal core 21: trace of joint
22: valves 23, 24: sheet
Detailed Description
The features and effects of the "dust mask" of the present invention, which may or may not be mentioned above, will be more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings. In the figures following fig. 3, a dust mask according to the present invention is indicated by reference numeral 10.
Referring to fig. 3 and 5, the dust mask 10 of the present invention includes: a filter body 11 which is a three-dimensional type and wraps the circumference of the nose and mouth of a user; a facing portion 12 having a ring shape and an outer peripheral edge joined to an edge end of the filter body 11; and an orthosis 13 which is a three-dimensional type and is detachably provided inside the filter body 11, and an edge end of the orthosis 13 is inserted into a joint portion 15 of the filter body 11 and the facing portion 12. The filter body 11 is connected at both sides with head bands 14, and the dust mask 10 can be fixed at a proper position on the user's face.
Although the basic structure of such a dust mask is a known structure proposed in Japanese laid-open patent publication No. 2003-320041 and shown in FIG. 2 in this specification, the dust mask 10 of the present invention has its technical features in the specific construction of the below-described orthosis 13.
Any known mask filter material that can filter out dust, dirt, and the like in the air can be used as the filter body 11. For example, a structure in which filtration layers of the same kind or different kinds are stacked in plural layers may be employed. The filter body 11 is shaped to form a face space, and has a substantially hemispherical shape. However, since the filter material is flexible, its form is easily broken even by a small pressure or load. Thus, an orthosis 13 for maintaining the form is provided.
The facing portion 12 is a sheet material formed by laminating (laminating) a soft resin such as polyurethane on one surface of a synthetic fiber fabric such as nylon fiber or polyester fiber or a fabric such as cotton. The facing portion 12 may be made of a rubber material such as rubber, silicone, or urethane. However, the sheet material is generally considered to be advantageous if the factors of the tactile sensation or flexibility of the face are taken into consideration. In addition, the attachment portion 12 is formed in a shape of a special ring in consideration of the shape of the bridge of the nose, so that it can flexibly cope with different shapes of users, and has good adhesion.
For the filter body 11 and the facing portion 12, the edge end of the filter body 11 and the outer peripheral edge of the facing portion 12 are integrally joined to each other. As a method of joining, a method such as adhesive, sewing, welding, or the like can be employed. In addition, the orthosis 13 is disposed inside the filter body 11 by inserting the edge end thereof into the engaging portion 15. In the present invention, the orthosis 13 includes: a support body 16 for supporting the entire three-dimensional shape of the filter body 11 and the dust mask 10; a nose bridge pressing tool 18 attached and fixed to the outer upper end of the support body 16.
Specifically, the support body 16 is made of a water-absorbent nonwoven fabric material having a material harder than the filter body 11 and a loose air-permeable structure, the support body 16 is formed in a three-dimensional shape, and the support body 16 is provided so that the outer surface thereof is in contact with the inner surface of the filter body 11, thereby supporting the three-dimensional shape of the entire filter body 11 and the dust mask 10.
In general, a "nonwoven fabric" is formed in a form of a felt or sheet by arranging fibers in parallel or in a non-directional manner and bonding them with a resin binder or by thermal fusion without using a weaving process such as weaving or weaving. The fiber can be polyester, polypropylene, rayon, vinylon, nylon, or other chemical fiber. Such nonwoven fabrics exhibit different physical properties depending on the kind of raw materials used, the thickness of the fibers, the method of forming and bonding, the kind of binder, and the like, and therefore, a desired nonwoven fabric can be selected or produced depending on the purpose and use thereof.
In the present invention, the support body 16 is used to absorb moisture generated by the user's breath while supporting the shape of the filter body 11. Therefore, it is required to have so-called "rigidity" and "water absorption property". However, the support body 16 does not have the function of a filter. Therefore, for example, even if the so-called nonwoven fabric has a dense weave structure or an areal density structure, this leads to a reduction in the air permeability of the dust mask as compared with the filter body 11, thereby increasing the breathing resistance of the user, which is a factor that must be considered. Thus, in the present invention, the support body 16 is defined as: "is made of a water-absorbent nonwoven fabric material which is harder than the filter body 11 and has a loose air-permeable weave structure", and the outer side thereof is in contact with the inner side of the filter body 11.
Preferably, the support body 16 includes a V-shaped groove 17 formed at an upper end of an edge thereof. The V-shaped groove 17 corresponds to the bridge of the nose of the user, so that the filter body 11 can be perfectly fitted to the bridge of the nose of the user. For example, in conventional dust masks 1 and 5 shown in fig. 1 and 2, a protruding bent portion 8 is formed corresponding to the bridge of the nose of the user. In this case, the bent portion 8 excessively covers the nose, thereby causing inconvenience to the user and hindering breathing. In contrast, the V-shaped groove 17 of the present embodiment does not cause inconvenience to the bridge of the nose of the user even if it is closely fitted to the bridge of the nose, and can still breathe freely.
The pressing tool 18 is made of a material capable of adjusting a curvature according to a shape of a bridge of a nose of a user, is transversely attached to an outer upper end of the support body 16, and is covered by the filter body 11 to prevent the pressing tool 18 from being exposed to the outside. That is, the pressing tool 18 is made of a material that can be bent and adjusted according to the size and shape of the bridge of the nose of the user, and the pressing tool 18 is covered by the filter body 11 in a state of being attached to the support body 16. Preferably, the pressing tool 18 is a thin rectangular sheet of metal or composite sheet of metal with a transverse metal core inserted into a flexible material, and may be attached to the support 16 by sewing, adhesive, ultrasonic, heat fusion, or the like.
In the present embodiment, the pressing tool 18 is a composite sheet composed of a main body 19 of flexible rubber or plastic and metal cores 20 inserted respectively to the upper and lower sides thereof, and has advantages of being lighter than a metal sheet, being easily attached, being freely adjustable in bending, and the like. Preferably, the thickness of the middle portion of the main body 19 is made thinner than the upper and lower metal core 20 portions, and it is easier to attach the pressing tool 18 to the support body 16 by various methods using the middle portion. For example, the reference numeral 21 denotes an ultrasonic bonding trace formed in the middle portion of the body 19.
The reference numeral 22 denotes a valve provided through the filter body 11 and the support body 16 to assist the breathing of the user of the dust mask 10, and is a so-called check-valve (exhaust-only) for allowing air to flow only in one direction. The valve 22 is not necessarily limited to this position, and may be disposed on the left, right, or center, from the perspective of a user wearing the dust mask 10 of the present invention. The symbol "H" is a hole for installing the valve 22.
Referring to fig. 6, the dust mask 10 of the present invention is disposed at a proper position on the face of the user by means of the head bands 14 provided at both sides of the filter body 11. In this case, the V-shaped groove 17 and the pressing tool 18 at the upper end of the support body 16 are disposed on the bridge of the nose of the user. In this state, the user can bend the bridge of the nose according to the size and shape thereof by pressing the pressing tool 18 with the fingers to the left and right uniformly against the bridge of the nose. Thus, the pressing tool 18 can be adjusted to fit the curved shape of different users, and the entire dust mask 10 including the support body 16, the facing portion 12, and the filter body 11 can be completely brought into close contact with the bridge of the nose of the user.
Thus, the user can breathe safely. In this case, the moisture produced by breathing is largely already absorbed by the support body 16 of the orthosis 13 before coming into contact with the filter body 11, the support body 16 being separate from the filter body 11, so that the moisture can be disposed of very easily. Therefore, the dust mask 10 of the present invention is hardly damaged or deteriorated in filtering efficiency due to moisture generated by the breathing of the user.
Fig. 7 and 8 show a method of forming the support body 16 in a three-dimensional shape. In the first method, the central portion of the substantially circular nonwoven fabric sheet 23 is pressed by hot pressing to form a substantially hemispherical shape. In the second method, the upper side and the lower side of the nonwoven fabric sheet 24, which is substantially oblong in the vertical direction, are cut at a predetermined length, and the opposing cut pieces are superimposed in the direction crossing each other (see the arrows shown in fig. 8), whereby a three-dimensional shape with a convex center can be formed.
The support body 16 has the same value in the present invention, regardless of the method of any one of the listed methods, as long as it is under the condition defined above, i.e., "it is made of a water-absorbent nonwoven material which is harder than the filter body 11 and has a loose air-permeable weave structure".
Claims (5)
1. A dust mask, comprising: a filter body (11) which is a three-dimensional type and is used for wrapping the periphery of the nose and the mouth of a user; a facing portion (12) which is annular and whose outer peripheral edge is joined to the edge end of the filter body; an orthosis (13) which is a three-dimensional type and is detachably provided inside the filter body, and an edge end of the orthosis (13) is inserted into a joint portion (15) of the filter body and the facing portion,
this dust mask's characterized in that:
the orthosis (13) comprising: a support (16), which is made of water-absorbing non-woven fabric, is harder than the filter body, has a loose air-permeable structure, and absorbs moisture generated by breathing by directly contacting with the breathing of a user; and a nose bridge pressing tool (18), wherein the nose bridge pressing tool (18) is made of a material capable of adjusting the curvature formed according to the shape of the nose bridge of the user, is transversely attached to the upper end of the outer surface of the support body (16), and is covered by the filter body (11) to prevent the nose bridge pressing tool (18) from being exposed to the outside.
2. The dust mask of claim 1, wherein:
the support body (16) comprises: a V-shaped groove (17) formed at the upper end of the edge thereof corresponding to the bridge of the nose of the user.
3. The dust mask of claim 1, wherein:
the pressing tool (18) is a rectangular metal sheet or a composite sheet formed by inserting a transverse metal core (20) into a body (19) made of a flexible material.
4. The dust mask of claim 1, wherein:
the pressing tool (18) is a composite sheet formed by inserting a transverse metal core (20) into the upper and lower sides of the interior of a main body (19) made of a flexible material, and the composite sheet is adhered to the support body (16) through the middle part of the main body (19) when the thickness of the middle part is smaller than that of the upper and lower metal cores (20).
5. The dust mask of claim 1, wherein:
the support body (16) is three-dimensional through the following two methods:
a method of cutting the upper and lower sides of a sheet (23) having an oblong shape along the upper and lower sides thereof by a predetermined length, and stacking the opposed slices in the direction intersecting each other; or,
a method of forming a hemispherical space by thermally pressurizing the central portion of a circular nonwoven fabric sheet (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710157507.1A CN108618234B (en) | 2017-03-16 | 2017-03-16 | Dust mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710157507.1A CN108618234B (en) | 2017-03-16 | 2017-03-16 | Dust mask |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108618234A true CN108618234A (en) | 2018-10-09 |
| CN108618234B CN108618234B (en) | 2019-11-29 |
Family
ID=63687691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710157507.1A Expired - Fee Related CN108618234B (en) | 2017-03-16 | 2017-03-16 | Dust mask |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108618234B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63240883A (en) * | 1987-03-02 | 1988-10-06 | ミネソタ マイニング アンド マニユフアクチユアリング カンパニー | Production of mask and mask material |
| KR20040068913A (en) * | 2004-07-16 | 2004-08-02 | (주)우리텍 | A mask with various functions |
| KR20120121246A (en) * | 2011-04-26 | 2012-11-05 | 진종각 | Double-mask for preventing condensation |
| CN102987603A (en) * | 2011-09-08 | 2013-03-27 | 郑贞大 | Dust mask |
| CN103127632A (en) * | 2011-11-22 | 2013-06-05 | 埃森·费尔索夫 | Breathing mask and filter thereof |
-
2017
- 2017-03-16 CN CN201710157507.1A patent/CN108618234B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63240883A (en) * | 1987-03-02 | 1988-10-06 | ミネソタ マイニング アンド マニユフアクチユアリング カンパニー | Production of mask and mask material |
| KR20040068913A (en) * | 2004-07-16 | 2004-08-02 | (주)우리텍 | A mask with various functions |
| KR20120121246A (en) * | 2011-04-26 | 2012-11-05 | 진종각 | Double-mask for preventing condensation |
| CN102987603A (en) * | 2011-09-08 | 2013-03-27 | 郑贞大 | Dust mask |
| CN103127632A (en) * | 2011-11-22 | 2013-06-05 | 埃森·费尔索夫 | Breathing mask and filter thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108618234B (en) | 2019-11-29 |
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