CN111317931A - Breathing protection device - Google Patents
Breathing protection device Download PDFInfo
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- CN111317931A CN111317931A CN202010328291.2A CN202010328291A CN111317931A CN 111317931 A CN111317931 A CN 111317931A CN 202010328291 A CN202010328291 A CN 202010328291A CN 111317931 A CN111317931 A CN 111317931A
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- layer
- hot air
- protection device
- filter layer
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/10—Respiratory apparatus with filter elements
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- 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
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/06—Mouthpieces; Nose-clips
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- General Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention provides a respiratory protection device, which comprises a mask main body, a nose bridge rib, a left hanging lug and a right hanging lug, wherein the nose bridge rib is arranged on the mask main body; the mask main body is sequentially provided with a first non-woven fabric layer, a middle filter layer and a second non-woven fabric layer from outside to inside; the middle filter layer is sequentially provided with a first melt-blown fabric filter layer, a hot air cotton layer and a second melt-blown fabric filter layer from outside to inside; the edges of the first non-woven fabric layer, the middle filter layer and the second non-woven fabric layer are fixedly connected. Through setting up hot-blast cotton layer, and hot-blast cotton layer is more fluffy, forms an approximate parallel interval in the middle of two-layer melt-blown fabric filter layer, and the air can freely move between two-layer melt-blown fabric filter layer for any point transmission on the surface of outer layer melt-blown fabric filter layer including the air can, both played splendid separation nature, adjusted the inside and outside pressure drop of respiratory protection device during the use again, ventilative comfort level during the use can effectively obtain improving.
Description
Technical Field
The invention relates to the field of medical protection devices, in particular to a respiratory protection device.
Background
The respiratory protection device (also called mask) is worn at the mouth and nose part and used for filtering air entering and exiting from the mouth and nose so as to achieve the purpose of preventing harmful gas, smell and spray from entering and exiting from the mouth and nose of a wearer, is mostly made of gauze or paper and the like, has a certain filtering effect on air entering the lung, and has a very good effect when the respiratory protection device is worn in an environment polluted by dust and the like when respiratory infectious diseases are prevalent.
The existing breathing protection devices such as medical masks (for example, masks with the model of KN95 or N95) mainly play a role in filtering and blocking two layers of melt-blown fabric barrier layers positioned in the middle, so that if the barrier property needs to be improved, the barrier property is mainly realized by enhancing the density or thickness of the melt-blown fabric barrier layers, but the ventilation property is influenced, the feeling of suffocation during wearing is caused, and the use comfort degree is greatly influenced; if the density (or thickness) of the filter layer of the respiratory protection device is reduced, although the air permeability can be improved, the barrier property can be seriously influenced, so that the mask cannot have the air permeability and the barrier property.
Thus, there is a need for a new configuration of respiratory protection device to address the above problems.
Disclosure of Invention
The invention provides a breathing protection device, wherein a hot air cotton layer is arranged between two melt-blown cloth filter layers on a mask main body, the hot air cotton layer is fluffy, an approximately parallel interval is formed between the two melt-blown cloth filter layers, and air can freely move between the two melt-blown cloth filter layers, so that the air can be transmitted at any point on the surfaces of the inner and outer melt-blown cloth filter layers, and the melt-blown cloth filter layers are combined, so that the breathing protection device has excellent barrier property, the pressure drop inside and outside the breathing protection device during use is reduced, and the ventilation comfort level during use can be effectively improved.
Specifically, the present invention proposes the following specific examples:
the embodiment of the invention provides a breathing protection device, which comprises a mask main body, a nose bridge rib, a left hanging lug and a right hanging lug, wherein the nose bridge rib, the left hanging lug and the right hanging lug are connected with the mask main body; the mask main body is sequentially provided with a first non-woven fabric layer, a middle filter layer and a second non-woven fabric layer from outside to inside; the middle filter layer is sequentially provided with a first melt-blown fabric filter layer, a hot air cotton layer and a second melt-blown fabric filter layer from outside to inside; the edges of the first non-woven fabric layer, the middle filter layer and the second non-woven fabric layer are fixedly connected; the left side of the mask main body is connected with the left hanging lug, and the right side of the mask main body is connected with the right hanging lug.
In a specific embodiment, the thickness of the hot air cotton layer is between 0.03 and 1.2 mm; when the width of the hot air cotton used by the hot air cotton layer is between 150 and 650mm, the width deviation is allowed to be between +/-7 mm; the unit area mass of the hot air cotton layer is 12-120 g/square meter and the deviation rate is +/-11%.
In one specific embodiment, the mass per unit area of the hot air cotton layer is between 30 and 70 grams per square meter and the deviation rate is between +/-10 percent.
In one specific embodiment, the mass per unit area of the hot air cotton layer is between 45 and 60 grams per square meter and the deviation rate is between +/-10 percent.
In a specific embodiment, the outer side of the hot air cotton layer is also provided with a solid net which is made of resin containing cross-linked copolymer of butyl acrylate and methyl methacrylate.
In a particular embodiment, the porosity of the through-air batting layer is greater than the porosity of the first meltblown fabric filter layer and the porosity of the second meltblown fabric filter layer.
In a specific embodiment, the nose bridge rib is an elongated metal wavy sheet, and the wavy portion of the metal wavy sheet extends along the length direction.
In a specific embodiment, the method further comprises the following steps: one or more flexible catheters are sleeved on the left hanging lug and are connected with the left hanging lug in a sliding manner; one or more flexible guide pipes are sleeved on the right hanging lug and are in sliding connection with the right hanging lug.
In a specific embodiment, the method further comprises the following steps: the mask comprises a sealing piece, wherein the bottom of the sealing piece is connected with the inner side of the bottom of the mask body, the left end of the sealing piece is connected with the left end of the mask body, the right end of the sealing piece is connected with the right end of the mask body, and the top of the sealing piece is far away from the mask body.
Therefore, the embodiment of the invention provides a breathing protection device, which comprises a mask main body, a nose bridge rib, a left hanging lug and a right hanging lug, wherein the nose bridge rib, the left hanging lug and the right hanging lug are connected with the mask main body; the mask main body is sequentially provided with a first non-woven fabric layer, a middle filter layer and a second non-woven fabric layer from outside to inside; the middle filter layer is sequentially provided with a first melt-blown fabric filter layer, a hot air cotton layer and a second melt-blown fabric filter layer from outside to inside; the edges of the first non-woven fabric layer, the middle filter layer and the second non-woven fabric layer are fixedly connected; the left side of the mask main body is connected with the left hanging lug, and the right side of the mask main body is connected with the right hanging lug. Set up hot-blast cotton layer through in the middle of two-layer melt-blown cloth filter layer in the face guard main part, and hot-blast cotton layer is more fluffy, form the interval that is similar to the parallel in the middle of two-layer melt-blown cloth filter layer, the air can freely move between two-layer melt-blown cloth filter layer, make the air can be including any point transmission on outer layer melt-blown cloth filter layer surface, with this melt-blown cloth filter layer that combines itself to have, make respiratory protection device both play fabulous separation nature, the inside and outside pressure drop of respiratory protection device during the use has been adjusted again, ventilative comfort level during the use can effectively obtain improving.
Description of the drawings:
fig. 1 is a schematic structural diagram of a respiratory protection device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a respiratory protection apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a respiratory protection apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a respiratory protection apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic view of a multi-layer structure of a mask body for a respiratory protection device in accordance with an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a respiratory protection device according to an embodiment of the present invention.
Illustration of the drawings:
1-a mask body;
11-a first nonwoven layer;
12-an intermediate filter layer;
121-a first meltblown fabric filter layer; 122-a layer of hot air cotton; 123-a second meltblown fabric filter layer;
13-a second nonwoven layer;
2-left hangers; 3-right hangers;
4-the nasal bridge tendon; 5-a seal;
6-a flexible conduit; 61-pressing the fixing piece;
7-sealing the cushion;
8-pulling a rope; 9-elastic buckle.
Example 1:
the embodiment 1 of the invention discloses a breathing protection device, which comprises a mask main body 1, a nose bridge rib 4 connected to the mask main body 1, a left hanging lug 2 and a right hanging lug 3, wherein the nose bridge rib is connected to the mask main body 1; the mask main body 1 is sequentially provided with a first non-woven fabric layer 11, an intermediate filtering layer 12 and a second non-woven fabric layer 13 from outside to inside; the middle filter layer 12 is sequentially provided with a first melt-blown fabric filter layer 121, a hot air cotton layer 122 and a second melt-blown fabric filter layer 123 from outside to inside; the edges of the first non-woven fabric layer 11, the middle filter layer 12 and the second non-woven fabric layer 13 are all fixedly connected; the left side of the mask body 1 is connected with the left hanging lug 2, and the right side of the mask body 1 is connected with the right hanging lug 3.
Specifically, in the scheme, the mask body 1 is fixed on the face through the left hanging lug 2 and the right hanging lug 3, the mask body 1 is used for covering the mouth and nose part of a wearer, and in order to ensure the sealing performance, the chin of the wearer can be further covered, and by arranging the nose bridge rib 4, specifically, the nose bridge rib 4 can be arranged between the first non-woven fabric layer 11 and the second non-woven fabric layer 13 and corresponds to the bridge of the nose of the wearer, and can also be arranged on the outer surface of the mask body 1; when wearing respiratory protection device, can press nose bridge muscle 4, make it laminate the nose bridge to reduce the space, guarantee the leakproofness, make the air that the wearer breathed be as far as through face guard main part 1 filterable. In addition, in order to better press the nose bridge rib 4, the nose bridge rib 4 may be provided as a long-strip-shaped wavy metal sheet, and the wavy portion of the wavy metal sheet extends in the length direction. Based on the structural design of the wavy part, the nose bridge ribs 4 are beneficial to bending, and the nose bridge can be pressed and attached to the nose bridge of a wearer conveniently.
In order to ensure the filtering effect, the edges of the first non-woven fabric layer 11, the middle filter layer 12 and the second non-woven fabric layer 13 are all fixedly connected, in addition, the middle of the mask main body 1 is provided with the middle filter layer 12, the middle filter layer 12 is provided with a first melt-blown fabric filter layer 121, a hot air cotton layer 122 and a second melt-blown fabric filter layer 123, so that the hot air cotton layer 122 is arranged in the mask main body 1, the hot air cotton layer 122 has the fluffy characteristic, the hot air cotton layer 122 can form an approximately parallel interval between the two melt-blown fabric filter layers, air can freely move between the two melt-blown fabric filter layers, the air can be transmitted at any point on the surfaces of the inner and outer melt-blown fabric filter layers, the two melt-blown fabric filter layers are combined, the breathing protection device has excellent barrier property, and the pressure drop inside and outside the breathing protection device during the use is adjusted, the ventilation comfort degree in use can be effectively improved.
The test comparison is carried out by the embodiment of the scheme and different comparative examples, and particularly,
comparative example 1 a medical KN95 respiratory protection device corresponding to a hot air-free cotton layer 122 and having a double meltblown filter layer;
comparative example 2 is a medical KN95 respiratory device without a hot air cotton layer 122 and with two thicker meltblown filter layers (the thickness is 1.2 times of that of a common meltblown filter layer);
comparative example 3 is a disposable respiratory protection device with a single layer meltblown filter;
the test comprises an air ventilation resistance test and a filtration efficiency test (namely a test of filtration efficiency), wherein the air ventilation resistance test is carried out based on GB2626-2006, the filtration efficiency is tested according to GB2626-2006, and the test comparison results are shown in Table 1:
TABLE 1
| Expiratory resistance (Pa)/85L/min | Air suction resistance (Pa)/85L/min | Filtration efficiency/%) | |
| Example 1 | 120 | 155 | 99.98 |
| Comparative example 1 | 145 | 183 | 97.86 |
| Comparative example 2 | 321 | 420 | 99.99 |
| Comparative example 3 | 79 | 86 | 56.64 |
Based on table 1, it can be seen that, in the embodiment 1 of the present invention, the exhalation resistance and the inhalation resistance are both smaller than those of comparative examples 1 and 2 with double-layer meltblown filter layers, and particularly are much smaller than those of comparative example 2 with a thickened double-layer meltblown filter layer, and the exhalation resistance and the inhalation resistance of embodiment 1 are only larger than those of a disposable respiratory protection device with only a single-layer double-layer meltblown filter layer, but the filtration efficiency of the single-layer disposable respiratory protection device is too low, and the comparison has no practical significance, so that the respiratory protection device corresponding to embodiment 1 has good air permeability and is not easy to generate air tightness during wearing. In addition, based on table 1, it can be seen that the filtration efficiency of the respiratory protection device corresponding to embodiment 1 of the present invention is comparable to that of the general KN95 medical respiratory protection device and the thickened version of KN95 respiratory protection device, and far exceeds that of the disposable single-layer medical respiratory protection device. The tests also included a comfort test based on GB/T23465-:
TABLE 2
| Mean respiratory patency score | |
| Example 1 | 5.1 points of |
| Comparative example 1 | 2.6 points |
| Comparative example 2 | 1.9 points |
| Comparative example 3 | 4.1 points of |
As can be seen from table 5, the comfort aspect is greatly improved in comparison with the comparative examples participating in the test in the embodiment 1 of the present invention, especially far exceeding the KN95 respiratory protection device with the double-layer meltblown filter layer and the KN95 respiratory protection device with the double-layer thickened meltblown filter layer.
Example 2
The embodiment 2 of the invention discloses a respiratory protection device, and on the basis of the embodiment 1, the thickness of the hot air cotton layer 122 is limited to be 0.03-1.2mm in the embodiment; when the width of the hot air cotton used in the hot air cotton layer 122 is between 150 and 650mm, the allowable width deviation is within ± 7mm (the smaller the allowable width deviation is, the better); the mass per unit area of the hot air cotton layer 122 is 12-120 g/square meter and the deviation rate is +/-11% (the smaller the deviation is, the better).
Based on the comparative example and the test environment tested in example 1 above, the test and comparison results are shown in table 3:
TABLE 3
| Expiratory resistance (Pa)/85L/min | Air suction resistance (Pa)/85L/min | Filtration efficiency/%) | Mean respiratory patency score | |
| Example 1 | 120 | 155 | 99.98 | 5.1 points of |
| Example 2 | 115 | 147 | 99.97 | 5.2 points |
| Comparative example 1 | 145 | 183 | 97.86 | 2.6 points |
| Comparative example 2 | 321 | 420 | 99.99 | 1.9 points |
| Comparative example 3 | 79 | 86 | 56.64 | 4.1 points of |
Based on table 3, the barrier property and the air permeability can be better considered based on the arrangement of the hot air cotton layer.
Example 3
The embodiment 3 of the invention discloses a respiratory protection device, based on the embodiment 2 and based on the specific application environment of the respiratory protection device, in the embodiment 3, the thickness of the hot air cotton layer 122 can be further set between 0.05 mm and 1mm, in addition, the hot air cotton used by the hot air cotton layer 122 is further limited, and when the breadth range is between 200 and 600mm, the breadth deviation is allowed to be between +/-7 mm; the mass per unit area can be between 30 and 70 grams per square meter and the deviation rate is between +/-10 percent
The results of the test comparisons, again based on the comparative examples and test environments tested in examples 1-2 above, are shown in table 4:
TABLE 4
| Expiratory resistance (Pa)/85L/min | Air suction resistance (Pa)/85L/min | Filtration efficiency/%) | Mean respiratory patency score | |
| Example 1 | 120 | 155 | 99.98 | 5.1 points of |
| Example 2 | 115 | 147 | 99.97 | 5.2 points |
| Example 3 | 115 | 145 | 99.98 | 5.2 points |
| Comparative example 1 | 145 | 183 | 97.86 | 2.6 points |
| Comparative example 2 | 321 | 420 | 99.99 | 1.9 points |
| Comparative example 3 | 79 | 86 | 56.64 | 4.1 points of |
As shown in table 4, the barrier property and air permeability can be further optimized based on the arrangement of the hot air cotton layer.
Example 4
The embodiment 4 of the invention discloses a respiratory protection device, on the basis of the embodiment 3, the width of hot air cotton used by a hot air cotton layer 122 can be between 200 and 400mm, and the deviation is between +/-5 mm; the mass per unit area of the hot air cotton layer 122 can be limited to 45-60 g/square meter and the deviation rate is +/-10%; therefore, the barrier property and the air permeability of the breathing protection device can be continuously optimized while the use of the breathing protection device is effectively ensured.
Thus, based on the comparative examples and test environments tested in examples 1-3 above, the comparative results are shown in Table 5:
TABLE 5
| Expiratory resistance (Pa)/85L/min | Air suction resistance (Pa)/85L/min | Filtration efficiency/%) | Mean respiratory patency score | |
| Example 1 | 120 | 155 | 99.98 | 5.1 points of |
| Example 2 | 115 | 147 | 99.97 | 5.2 points |
| Example 3 | 115 | 145 | 99.98 | 5.2 points |
| Example 4 | 112 | 143 | 99.97 | 5.2 points |
| Comparative example 1 | 145 | 183 | 97.86 | 2.6 points |
| Comparative example 2 | 321 | 420 | 99.99 | 1.9 points |
| Comparative example 3 | 79 | 86 | 56.64 | 4.1 points of |
As shown in table 5, the barrier property and the air permeability can be further optimized based on the arrangement of the hot air cotton layer.
Example 5
in this case, the results of comparing example 5 with other tests are shown in Table 6, further based on the comparative examples and test environments tested in examples 1-4 above:
TABLE 6
| Expiratory resistance (Pa)/85L/min | Air suction resistance (Pa)/85L/min | Filtration efficiency/%) | Mean respiratory patency score | |
| Example 1 | 120 | 155 | 99.98 | 5.1 points of |
| Example 2 | 115 | 147 | 99.97 | 5.2 points |
| Example 3 | 115 | 145 | 99.98 | 5.2 points |
| Example 4 | 112 | 143 | 99.97 | 5.2 points |
| Example 5 | 110 | 142 | 99.98 | 5.2 points |
| Comparative example 1 | 145 | 183 | 97.86 | 2.6 points |
| Comparative example 2 | 321 | 420 | 99.99 | 1.9 points |
| Comparative example 3 | 79 | 86 | 56.64 | 4.1 points of |
As shown in table 6, the provision of the porosity of the hot-air cotton layer further optimizes both barrier properties and air permeability.
Example 6
On the basis of the embodiments 1 to 5, in order to more effectively fix the hot air cotton layer 122 and thus ensure the air permeability of the respiratory protection device, the outer side of the hot air cotton layer 122 is further provided with a fixing net, and the fixing net is made of resin containing a cross-linked copolymer of butyl acrylate and methyl methacrylate. Through the setting of this solid shape net, can effectively fix the shape of hot-blast cotton layer 122, guarantee whole respiratory protection device's gas permeability for respiratory protection device has gas permeability and separation nature concurrently.
Example 7
Through the setting of flexible pipe 6, and different flexible pipe 6 overlaps respectively to be established on left hangers 2 and right hangers 3, when needs pass through hangers and ear fixed with respiratory protection device, can adjust the position of flexible pipe 6 for flexible pipe 6 is connected with the ear, alleviates the sense of pressure to the ear with this, guarantees the travelling comfort of wearing.
In order to better fix the flexible conduit 6 to the left hanging lug 2 or the right hanging lug 3, one end or two ends of the flexible conduit 6 are provided with pressing fixing pieces 61 so as to be fixed on the sleeved left hanging lug 2 or right hanging lug 3 when being pressed to the bottom, and the flexible conduit 6 is fixed relative to the left hanging lug 2 or the right hanging lug 3.
In a specific embodiment, the pressing fixture 61 is a metal ring surrounded by a metal sheet. Specifically, for example, a metal ring formed of an iron sheet or a copper sheet may be fastened to the left or right ear 2 or 3 based on the pressing operation, thereby fixing the flexible tube 6 fixedly connected to the pressing fixture 61.
Example 8
The inboard bottom of face guard main part 11 still is provided with sealing member 5, based on the concrete structural design of sealing member 5, its bottom is connected with the inboard bottom of face guard main part 1, 5 both ends of sealing member are connected with the both ends of face guard main part 1 respectively, and face guard main part 1 is kept away from at the top of sealing member 5, when being worn, sealing member 5 can be the chin of inseparable laminating wearer more, has guaranteed the sealed to the person's oronasal part of wearing, make the air that the person of wearing breathes can be fine filtered, the cleanness of the person's breathing air has been guaranteed, sealed cushion 7 can be rectangular shape silica gel pad or rectangular shape foam-rubber cushion. With this, when the nose bridge rib 4 is pressed onto the nose bridge, a cushioning effect can be exerted by the sealing cushion 7, and the sealing property can be further increased.
In addition, through left hangers 2, right hangers 3 hang on the ear, can realize breathing protection device's fixed, and when the time of wearing breathing protection device is too long, as shown in fig. 6, can also set up elasticity and detain 9, pull rope 8, combine left hangers 2 and right hangers 3's string rope, through the elasticity degree that elasticity detained 9 regulation pull rope 8, can be with breathing protection device monolithic stationary at the head, under this condition, do not need the ear to fix, even wear the time very long, also can not produce the discomfort, do benefit to breathing protection device's long-time wearing, and can not influence original breathing protection device's structure.
Therefore, the embodiment of the invention provides a breathing protection device, which comprises a mask main body 1, a nose bridge rib 4, a left hanging lug 2 and a right hanging lug 3; the mask main body 1 is sequentially provided with a first non-woven fabric layer 11, an intermediate filtering layer 12 and a second non-woven fabric layer 13 from outside to inside; the middle filter layer 12 is sequentially provided with a first melt-blown fabric filter layer 121, a hot air cotton layer 122 and a second melt-blown fabric filter layer 123 from outside to inside; the edges of the first non-woven fabric layer 11, the middle filter layer 12 and the second non-woven fabric layer 13 are all fixedly connected; the left side of the mask body 1 is connected with the left hanging lug 2, and the right side of the mask body 1 is connected with the right hanging lug 3. Set up hot-blast cotton layer 122 in the middle of through the two-layer meltblown fabric filter layer in face guard main part 1, and hot-blast cotton layer 122 is more fluffy, can form an approximate parallel interval in the middle of the two-layer meltblown fabric filter layer, the air can freely remove between two-layer meltblown fabric filter layer, make any point transmission on the inner and outer meltblown fabric filter layer surface including the air can, with this meltblown fabric filter layer that combines itself to have, make respiratory protection device both play fabulous separation nature, the inside and outside pressure drop of respiratory protection device during the use has been adjusted again, ventilative comfort level during the use can effectively obtain improving.
Claims (8)
1. A respiratory protection device is characterized by comprising a mask main body, a nose bridge rib, a left hanging lug and a right hanging lug, wherein the nose bridge rib, the left hanging lug and the right hanging lug are connected to the mask main body; the mask main body is sequentially provided with a first non-woven fabric layer, a middle filter layer and a second non-woven fabric layer from outside to inside; the middle filter layer is sequentially provided with a first melt-blown fabric filter layer, a hot air cotton layer and a second melt-blown fabric filter layer from outside to inside; the edges of the first non-woven fabric layer, the middle filter layer and the second non-woven fabric layer are fixedly connected; the left side of the mask main body is connected with the left hanging lug, and the right side of the mask main body is connected with the right hanging lug; wherein the thickness of the hot air cotton layer is between 0.03 and 1.2 mm; the width of the hot air cotton used by the hot air cotton layer is between 150 and 650mm, and the width deviation is allowed to be between +/-7 mm; the unit area mass of the hot air cotton layer is 12-120 g/square meter and the deviation rate is +/-11%.
2. A respiratory protection device according to claim 1 wherein the thickness of the hot air cotton layer is between 0.05 mm and 1 mm; the width of the hot air cotton used by the hot air cotton layer is between 200 and 600mm, and the width deviation is allowed to be between +/-7 mm; the unit area mass of the hot air cotton layer is 30-70 g/square meter and the deviation rate is +/-10%.
3. The respiratory protection device as claimed in claim 2, wherein the width of the hot air cotton used in the hot air cotton layer is 200-400mm, and the width deviation is allowed to be ± 5 mm; the unit area mass of the hot air cotton layer is 45-60 g/square meter and the deviation rate is +/-10%.
4. The respiratory protection device of claim 1, wherein the hot air cotton layer is further provided with a solid net on the outer side, and the solid net is made of resin containing a cross-linked copolymer of butyl acrylate and methyl methacrylate.
5. The respiratory protection device of claim 1, wherein the porosity of the hot air wool layer is greater than the porosity of the first meltblown filter layer and the porosity of the second meltblown filter layer.
6. The respiratory protection device of claim 1, wherein said nose bridge rib is an elongated wavy metal sheet, and an undulated portion of said wavy metal sheet extends in a longitudinal direction.
7. A respiratory protection device as claimed in claim 1 further comprising: one or more flexible catheters are sleeved on the left hanging lug and are connected with the left hanging lug in a sliding manner; one or more flexible guide pipes are sleeved on the right hanging lug and are in sliding connection with the right hanging lug.
8. A respiratory protection device as claimed in claim 1 further comprising: the mask comprises a sealing piece, wherein the bottom of the sealing piece is connected with the inner side of the bottom of the mask body, the left end of the sealing piece is connected with the left end of the mask body, the right end of the sealing piece is connected with the right end of the mask body, and the top of the sealing piece is far away from the mask body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010328291.2A CN111317931A (en) | 2020-04-23 | 2020-04-23 | Breathing protection device |
| PCT/CN2020/131880 WO2021212830A1 (en) | 2020-04-23 | 2020-11-26 | Breathing protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010328291.2A CN111317931A (en) | 2020-04-23 | 2020-04-23 | Breathing protection device |
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|---|---|
| CN111317931A true CN111317931A (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010328291.2A Withdrawn CN111317931A (en) | 2020-04-23 | 2020-04-23 | Breathing protection device |
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| WO (1) | WO2021212830A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021212830A1 (en) * | 2020-04-23 | 2021-10-28 | 金发科技股份有限公司 | Breathing protection device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115088893B (en) * | 2022-08-15 | 2023-08-18 | 宁波利安科技股份有限公司 | Antibacterial breathable mask, mask assembly, mask processing technology and device |
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| WO2021212830A1 (en) * | 2020-04-23 | 2021-10-28 | 金发科技股份有限公司 | Breathing protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021212830A1 (en) | 2021-10-28 |
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Application publication date: 20200623 |