CN211302355U - Air filter screen, gauze mask and air purifier - Google Patents
Air filter screen, gauze mask and air purifier Download PDFInfo
- Publication number
- CN211302355U CN211302355U CN201921021649.6U CN201921021649U CN211302355U CN 211302355 U CN211302355 U CN 211302355U CN 201921021649 U CN201921021649 U CN 201921021649U CN 211302355 U CN211302355 U CN 211302355U
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- layer
- air
- air screen
- nanofiber
- nonwoven fabric
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- 239000002121 nanofiber Substances 0.000 claims abstract description 56
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 25
- 238000001523 electrospinning Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 239000004599 antimicrobial Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000010041 electrostatic spinning Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000005684 electric field Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000004887 air purification Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000005686 electrostatic field Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012527 feed solution Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
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- Nonwoven Fabrics (AREA)
- Filtering Materials (AREA)
Abstract
The application provides an air filter screen and include air filter screen's gauze mask and air purifier. The air screen includes: a non-woven fabric layer; a nanofiber layer comprising nanofibers with diameters of 50-300nm attached to the nonwoven fabric layer by high voltage electrospinning and extending from a surface of the nonwoven fabric layer away from the nonwoven fabric layer along a random path, a projection of the extending path of the nanofibers on the nonwoven fabric layer having a random lattice pattern comprising openings with diameters of between 1-10 μm; and a carcass base attached to the nanofiber layer and supporting the nanofiber layer and the nonwoven layer.
Description
Technical Field
The application relates to the air purification field, more specifically relates to an air filter, gauze mask and air purifier.
Background
Nowadays, the air pollution problem is attracting people's attention, and the market demand for air purification and protection equipment is also flourishing.
Air screens are particularly critical for air purification and protection equipment. The air filter screen is used as a core filter element and plays a role in blocking and adsorbing particles. The prior air filter screen mostly adopts a multilayer structure, wherein the filter layer is mostly made of a material which has a fiber diameter of 500-7000nm and is suitable for melt blowing through a melt blowing process, and the average effective pore size is mostly 3-15 μm. For large particles such as pollen, filtration can be carried out by physical interception, while for small particle dust, adsorption filtration is mainly carried out by means of a filter layer treated by electrostatic electret.
SUMMERY OF THE UTILITY MODEL
The present application is directed to an improved air screen and a mask and air purifier including the same.
A first aspect of the present application provides an air screen. The air screen includes: a non-woven fabric layer; a nanofiber layer comprising nanofibers with diameters of 50-300nm attached to the nonwoven fabric layer by high voltage electrospinning and extending from a surface of the nonwoven fabric layer away from the nonwoven fabric layer along a random path, a projection of the extending path of the nanofibers on the nonwoven fabric layer having a random lattice pattern comprising openings with diameters of between 1-10 μm; and a carcass base attached to the nanofiber layer and supporting the nanofiber layer and the nonwoven layer.
According to an embodiment of the application, the grammage of the nanofiber layer is 5-35g/m2。
According to an embodiment of the application, the carcass base layer and the nanofiber layer are attached to each other by an adhesive.
According to an embodiment of the application, the carcass base layer and the nanofiber layer are attached to each other by ultrasonic welding.
According to an embodiment of the present application, the non-woven fabric layer is formed of a polyester material.
According to an embodiment of the present application, the nanofibers are made of polyvinyl alcohol.
According to an embodiment of the present application, the nanofiber layer is compounded with an antimicrobial agent.
According to the embodiment of the application, the voltage adopted by the high-voltage electrostatic spinning is more than 10000 volts.
A second aspect of the present application provides a mask comprising the above air screen.
A third aspect of the present application provides an air purifier comprising the above air screen.
The application provides an air cleaner, gauze mask and air cleaner adopt non-woven fabrics layer, nanofiber layer and skeleton basic unit's order attachment structure to realize direct physics interception through the filter layer that the nanofiber that extends by random 3D constitutes.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic block diagram illustrating an air screen according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating nanofibers obtained by high voltage electrospinning according to embodiments of the present application; and
FIG. 3 is a schematic diagram illustrating the filtering of particulate matter by an air screen according to an embodiment of the present application.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, expressions such as "upper", "lower", and the like are used only for describing a relative positional relationship between the respective features, and do not represent any limitation on the features. In addition, in the present specification, ordinal terms such as "first", "second", and the like are used only to distinguish different components, regardless of importance, order, and the like. For example, "a first direction" and "a second direction" recited in the specification merely indicate different directions.
In the drawings, the thickness, size, and shape of each layer have been slightly exaggerated for convenience of explanation. That is, the figures are purely diagrammatic and not drawn to scale.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one item of. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Additionally, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including engineering and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. The features, principles, and other aspects of the present application are described in detail below.
Fig. 1 is a schematic block diagram illustrating an air screen 100 according to an embodiment of the present application.
The non-woven fabric layer 101 may be made of a polyester material. The nonwoven layer 101 is composed of oriented or random fibers. The non-woven fabric layer 101 serves as a base material for high-voltage electrostatic spinning of the nanofibers to allow the nanofibers to adhere and form, and can intercept particles, hairs and the like visible to the naked eye to avoid reducing the filtering effect of the nanofiber layer 102.
The nanofiber layer 102 is the main filtration layer. As described above, the nanofiber layer 102 is formed on the non-woven fabric layer 101 by the high voltage electrospinning technique and has a thickness of about 4 μm. Specifically, a dope solution prepared from polyvinyl alcohol (PVA) and a suitable solvent may be placed in the dope supply apparatus. A negative electrode receiving device may be disposed on the non-woven fabric layer 101 side, and a positive electrode emitting device may be disposed on the opposite side. The feed liquid supply device supplies feed liquid to the anode emission device. Then a high-voltage electrostatic field is applied between the positive electrode transmitting device and the negative electrode receiving device.
According to the embodiment of the application, the voltage difference between the electrodes on the two sides of the high-voltage electrostatic field can be more than 10000 volts. The nanofiber layer spun under the voltage has stronger material stability.
The direction of the electric field force is opposite to that of the surface tension of the feed liquid, and the large electric field force deforms the feed liquid from a spherical shape into a Taylor cone. Along with the enhancement of the electric field force, the balance between the electric field force and the surface tension of the feed liquid is broken, and the feed liquid is emitted from the positive electrode emitting device to the negative electrode receiving device to form radial whip jet flow and is rapidly polarized and stretched in the electric field. During the drawing process, the solvent in the dope is rapidly volatilized due to the rapidly increased specific surface area (area/volume). Eventually, the PVA material in the feed solution forms nanofibers that extend along random paths. The nanofibers formed by this process have a fiber diameter of 50-300 nm. The nanofiber layer of air screen 100 provided herein may have a thickness of 5-35g/m2Gram weight of (c).
Fig. 2 is a schematic diagram illustrating nanofibers obtained by high voltage electrospinning according to embodiments of the present application. FIG. 3 is a schematic diagram illustrating the filtering of particulate matter by an air screen according to an embodiment of the present application. As shown in fig. 3, the air is entrained with particulate matter 301 traveling in the direction of the airflow as shown. Only particles 301 smaller than pores 302 of nanofiber layer 102 are able to pass through pores 302 while passing through air screen 100, while the remaining particles are intercepted/adsorbed.
The nanofibers formed by the high voltage electrospinning technique described above extend spatially in all directions to form a 3D structure. If the 3D structure is projected onto the nonwoven layer 101, a random grid pattern may be formed. The term "random grid pattern" as used herein means a pattern of voids (or openings) having irregular shapes and arrangements. The pores of these random grid patterns have an average diameter of between 1 and 10 μm.
It is worth noting that the filtering layer of the common air filtering net in the market at present mostly adopts a physical interception-electrostatic adsorption combined filtering mode. This requires electrostatic electret treatment of the filter layer. However, the filter layer after electrostatic electret treatment is susceptible to temperature and humidity. Under the environment of high temperature and high humidity, the service life of the filter layer after the electrostatic electret treatment can be obviously shortened and the filter layer is easy to lose efficacy. In addition, the common air filter screen on the market is mostly formed by melt-blowing at the high temperature of 240-300 ℃ by a melt-blowing process. Because other composite materials are easy to lose effectiveness due to the high-temperature characteristic of the processing technology, the filtering layer formed by the melt-blown technology is difficult to combine with other functions.
However, the air screen 100 provided herein is formed by a high voltage electrospinning process. On one hand, the characteristic of high-voltage electrostatic spinning technology that whip jet is emitted from a Taylor cone and rapid polarization and stretching are realized, a high-density and small-pore filtering structure is easy to form, and therefore, small particles can be filtered only by physical interception and adsorption without electrostatic electret treatment. On the other hand, the high-voltage electrostatic spinning process only needs to be carried out at normal temperature, so that the nanofiber layer as the filter layer has good function expansibility.
The nanofiber layer prepared by high voltage electrostatic spinning is attached to the non-woven fabric layer 101, and the other side of the nanofiber layer is attached to the supporting skeleton base layer 103. The skeletal base layer 103 may be formed of a polyethylene terephthalate (PET) material and also have a nonwoven structure. The carcass base layer 103 and nanofiber layer 102 may be attached to each other by an adhesive. For example, the scaffold base layer 103 and the nanofiber layer 102 may be attached to each other by spray glue. Further, the scaffold base layer 103 and the nanofiber layer 102 may be connected to each other by ultrasonic welding.
As described above, since the air filter screen 100 provided by the present application uses the high voltage electrostatic spinning process, the preparation process only needs to be performed at normal temperature. Based on this, the nanofiber layer 102 may also be compounded with an antimicrobial agent according to embodiments of the present application. The antimicrobial agent may be incorporated into the nanofiber layer 102 of the air screen 100 of the embodiments of the present application even if it has high temperature failure characteristics.
The application also provides a gauze mask, the gauze mask includes above-mentioned air filter. The shape and overall structure of the mask may be configured as is common in the art. For example, the mask may include a mask body and fastening bands disposed at both sides of the mask body. The mask body may include a textile outer layer, an air screen, and a textile inner layer. The air screen may employ the structure described above in this application.
The application also provides an air purifier, air purifier includes above-mentioned air filter. Air purifier can include the shell, set up the air filter screen fixed part in the shell, centre gripping air filter screen, fan and the power on air filter screen fixed part. The air screen may employ the structure described above in this application.
The above description is only a preferred embodiment of the present application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. An air screen, comprising:
a non-woven fabric layer;
a nanofiber layer comprising nanofibers with diameters of 50-300nm attached to the nonwoven fabric layer by high voltage electrospinning and extending from a surface of the nonwoven fabric layer away from the nonwoven fabric layer along a random path, a projection of the extending path of the nanofibers on the nonwoven fabric layer having a random lattice pattern comprising openings with diameters of between 1-10 μm; and
a carcass base attached to the nanofiber layer and supporting the nanofiber layer and the nonwoven layer.
2. The air screen of claim 1, wherein the nanofiber layer has a grammage of 5-35g/m2。
3. The air screen of claim 1, wherein the skeletal base layer and the nanofiber layer are attached to one another by an adhesive.
4. The air screen of claim 1, wherein the skeletal base layer and the nanofiber layer are attached to one another by ultrasonic welding.
5. The air screen of claim 1, wherein the non-woven layer is formed from a polyester material.
6. The air screen of claim 1, wherein the nanofibers are made of polyvinyl alcohol.
7. The air screen of claim 1, wherein the nanofiber layer is compounded with an antimicrobial agent.
8. The air screen of claim 1, wherein the high voltage electrospinning employs a voltage of 10000 volts or more.
9. A mask characterized in that it comprises an air screen according to any one of claims 1 to 8.
10. An air purifier, characterized in that it comprises an air screen according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921021649.6U CN211302355U (en) | 2019-07-03 | 2019-07-03 | Air filter screen, gauze mask and air purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921021649.6U CN211302355U (en) | 2019-07-03 | 2019-07-03 | Air filter screen, gauze mask and air purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211302355U true CN211302355U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921021649.6U Active CN211302355U (en) | 2019-07-03 | 2019-07-03 | Air filter screen, gauze mask and air purifier |
Country Status (1)
| Country | Link |
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| CN (1) | CN211302355U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114159889A (en) * | 2021-11-24 | 2022-03-11 | 山东黄河三角洲纺织科技研究院有限公司 | Nanofiber air filtering material and preparation method thereof |
-
2019
- 2019-07-03 CN CN201921021649.6U patent/CN211302355U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114159889A (en) * | 2021-11-24 | 2022-03-11 | 山东黄河三角洲纺织科技研究院有限公司 | Nanofiber air filtering material and preparation method thereof |
| CN114159889B (en) * | 2021-11-24 | 2023-10-20 | 山东黄河三角洲纺织科技研究院有限公司 | Nanofiber air filtering material and preparation method thereof |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220516 Address after: 264000 No. 408, East Annex building, Shuangmei entrepreneurship Incubation Park, No. 3 Huanghe Road, Yantai Economic and Technological Development Zone, Shandong Province Patentee after: Yantai Dingjun New Material Technology Co.,Ltd. Address before: 2110, floor 2, building 23, No. 18, anningzhuang East Road, Qinghe, Haidian District, Beijing 100095 Patentee before: Beijing misway Intelligent Technology Co.,Ltd. Patentee before: Xiang Wen Liu |