CN112704287A - Filtering device with double-peak distribution for electrostatic spinning nanofiber cloth and mask - Google Patents
Filtering device with double-peak distribution for electrostatic spinning nanofiber cloth and mask Download PDFInfo
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- CN112704287A CN112704287A CN202110038644.XA CN202110038644A CN112704287A CN 112704287 A CN112704287 A CN 112704287A CN 202110038644 A CN202110038644 A CN 202110038644A CN 112704287 A CN112704287 A CN 112704287A
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- nanofiber cloth
- electrostatic spinning
- peak
- cloth
- spinning nanofiber
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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
- A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
- A41D13/1115—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a horizontal pleated pocket
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/02—Layered materials
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2500/00—Materials for garments
- A41D2500/30—Non-woven
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Nonwoven Fabrics (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Filtering Materials (AREA)
Abstract
An object of the present invention is to provide a filter device and a mask having an electrospun nanofiber cloth with a bimodal distribution, comprising: melt-blown non-woven fabrics and electrostatic spinning nanofiber cloth with bimodal distribution; the electrostatic spinning nanofiber cloth comprises a first wave peak accounting for 88-92% of the electrostatic spinning nanofiber cloth and a second wave peak accounting for 8-12% of the electrostatic spinning nanofiber cloth; the fiber diameter of the second peak is smaller than that of the melt-blown non-woven fabric. According to the electrostatic spinning nanofiber cloth, the bimodal distribution of the fiber diameters is set within a certain range, wherein the fiber diameter of the first peak occupies 90% of the total area, so that the main body of the whole electrostatic spinning nanofiber cloth is formed, and the physical barrier effect is achieved; the fiber diameter of the second peak occupies 10% of the total area, and the pore size of the electrostatic spinning nanofiber cloth can be increased, so that the overall bulkiness of the electrostatic spinning nanofiber cloth is improved, and the respiratory resistance is reduced.
Description
Technical Field
The invention belongs to the field of respiratory protection, and particularly relates to a filtering device and a mask of electrostatic spinning nanofiber cloth with bimodal distribution.
Background
In the production of masks of today, it is common to use melt-blown nonwoven fabrics for filtration. However, meltblown nonwovens generally filter some small particulate matter.
The high-performance electrostatic spinning nanofiber filtering material needs to have the characteristics of high efficiency and low resistance, but the conventional high-performance electrostatic spinning nanofiber filtering material realizes the filtration of particles by depending on the structural characteristics (aperture size, stacking density and the like) of the material, and generally has high efficiency and simultaneously brings high pressure resistance, so that the ventilation capability is poor. Therefore, the effective balance of the filtering efficiency and the pressure resistance is difficult to realize only by the structural characteristics of the high-performance electrostatic spinning nano-fiber, and the use standards of high-efficiency filtering and low resistance cannot be achieved.
In summary, a mask using a meltblown nonwoven fabric and high performance electrospun nanofibers in a laminated manner has been produced. However, the prior art products cannot achieve both the filtering effect and the air flow resistance, and improvements are needed to be made on the prior art products.
Disclosure of Invention
The invention aims to provide a filtering device and a mask with an electrostatic spinning nanofiber cloth with a bimodal distribution, which can ensure excellent filtering performance, do not generate a blocking effect on airflow and further do not cause increase of resistance pressure drop.
In order to achieve the above object, the present invention provides a filtration apparatus of electrospun nanofiber cloth having a bimodal distribution, comprising:
the electrostatic spinning nanofiber cloth is characterized in that the diameter distribution among fibers in the electrostatic spinning nanofiber cloth statistically has a bimodal distribution form;
the melt-blown non-woven fabric is arranged on at least one side of the electrostatic spinning nanofiber cloth and forms a filtering structure with more than two layers with the electrostatic spinning nanofiber cloth;
the bimodal distribution morphology comprises:
a first peak having a diameter in a range of: 0.05-0.3 μm, the ratio of fibers having a diameter in the range of said first peak being: 88 to 92 percent;
a second peak having a diameter in a range of: 3-6 μm, the ratio of fibers having a diameter in the second peak range being: 8 to 12 percent;
the fiber diameter of the second peak is smaller than that of the melt-blown non-woven fabric.
The melt-blown non-woven fabric is arranged on one side of the electrostatic spinning nanofiber cloth or the melt-blown non-woven fabric is arranged on both sides of the electrostatic spinning nanofiber cloth.
An electrospun nanofiber cloth mask having a bimodal distribution comprising:
the mask body comprises an inner layer and an outer layer, wherein the inner layer is used for fitting the face of a user;
the filter device of the previous aspect, disposed between the inner layer and the outer layer;
the melt-blown non-woven fabric is arranged on at least one side of the electrostatic spinning nanofiber cloth to support the electrostatic spinning nanofiber cloth.
The inner layer comprises non-woven fabric;
and/or, the outer layer comprises a nonwoven fabric.
The utility model provides an electrostatic spinning nanofiber cloth's gauze mask with two peak distributions, still includes the area body:
the belt body is used for keeping the mask main body on the face of a user.
The belt body comprises an ear-hanging type belt binding type belt or a head-covering type belt.
The mask body comprises a plane type or a three-dimensional type.
The invention has at least the following beneficial effects: in the electrostatic spinning nanofiber cloth, the first peak ratio is as follows: 88% -92%, the fiber diameter is: 0.05-0.3 μm; the second peak ratio: 8-12%, the fiber diameter is: 3-6 μm; the invention can solve the problem of overlarge breathing resistance after the melt-blown non-woven fabric and the electrostatic spinning nanofiber cloth are combined. The fiber diameter of the first wave crest is larger, the main body of the whole electrostatic spinning nanofiber cloth is formed, and the physical barrier effect is achieved; the fiber diameter of the second peak is smaller, the pore size of the electrostatic spinning nanofiber cloth can be increased, the overall bulkiness of the electrostatic spinning nanofiber cloth is improved, and therefore the respiratory resistance is reduced.
Furthermore, the fiber diameter of the second peak is controlled to be smaller than or close to that of the melt-blown non-woven fabric, so that the physical filtering effect of the electrostatic spinning nanofiber cloth is always higher than that of the melt-blown non-woven fabric, and the influence on the aerodynamics of the air flow passing through the melt-blown non-woven fabric is avoided; therefore, the physical barrier filtration of the non-woven fabric is matched with the electret effect of the melt-blown non-woven fabric, and the optimal barrier and breathing smoothness effect is realized.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic illustration of a bimodal distribution in a meltblown nonwoven fabric according to an embodiment of the invention.
Fig. 2 is a laminated view of a meltblown nonwoven fabric and an electrospun nanofiber fabric according to an embodiment of the present invention.
FIG. 3 is an electron microscope image of the combination of the meltblown nonwoven fabric and electrospun nanofiber fabric of the example of the invention.
FIG. 4 is a layer diagram of a second embodiment of the present invention.
Fig. 5 is a schematic view of a mask according to a second embodiment of the present invention.
In the figure: 1-mask body, 12-inner layer, 11-outer layer, 2-filtering device, 21-melt-blown non-woven fabric, 22-electrostatic spinning nanofiber cloth and 3-belt body.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A filtration device having a bimodal distribution of electrospun nanofiber cloth comprising:
the electrostatic spinning nanofiber cloth is characterized in that the diameter distribution among fibers in the electrostatic spinning nanofiber cloth statistically has a bimodal distribution form;
the melt-blown non-woven fabric is arranged on at least one side of the electrostatic spinning nanofiber cloth and forms a filtering structure with more than two layers with the electrostatic spinning nanofiber cloth;
the bimodal distribution morphology comprises:
a first peak having a diameter in a range of: 0.05-0.3 μm, the ratio of fibers having a diameter in the range of said first peak being: 88 to 92 percent;
a second peak having a diameter in a range of: 3-6 μm, the ratio of fibers having a diameter in the second peak range being: 8 to 12 percent;
the fiber diameter of the second peak is smaller than that of the melt-blown non-woven fabric.
The following detailed description of specific implementations of the present invention is provided in conjunction with specific embodiments:
example 1
Referring to the attached fig. 1-5 of the specification, a filtering device 2 with a bimodal distribution of electrospun nanofiber cloth 22 is provided, which comprises electrospun nanofiber cloth 22 and melt-blown non-woven fabric 21; the electrospun nanofiber cloth 22 has a bimodal distribution as shown in fig. 1.
As shown in fig. 2, a preferred embodiment, the meltblown nonwoven fabric 21 is disposed on one side of the electrospun nanofiber cloth 22 to support the electrospun nanofiber cloth 22. When the meltblown nonwoven fabric 21 is a single layer, the meltblown nonwoven fabric 21 and the electrospun nanofiber fabric 22 form a two-layer filter structure, and when the meltblown nonwoven fabric 21 is a plurality of layers, the meltblown nonwoven fabric 21 and the electrospun nanofiber fabric 22 form a multi-layer filter structure. In another embodiment, the meltblown nonwoven 21 may also be disposed on both sides of the electrospun nanofiber cloth 22.
As shown in fig. 3, the surface of the electrospun nanofiber cloth 22 of the present embodiment has a spider-web-shaped microporous structure, and has very complicated changes such as web-shaped communication, hole-inlaid sleeves, and pore channel bending in a three-dimensional structure, so that it has excellent surface filtration performance; wherein, the fiber diameter of the first peak of the electrospun nanofiber cloth 22 is: 0.05-0.3 μm; wherein, what the structure of ball bead is the second crest, the fibre diameter of second crest is: 3-6 μm.
In application, the specific data are as described in table I:
in testing the product, the following settings were made for the embodiment and the comparative scheme:
the first embodiment is as follows:
the filtering device 2 comprises an electrostatic spinning nanofiber cloth 22 and a melt-blown non-woven fabric 21, and the diameter distribution of each fiber in the electrostatic spinning nanofiber cloth 22 statistically has a bimodal distribution form. The melt-blown non-woven fabric 21 is arranged on one side of the electrostatic spinning nanofiber cloth 22 to form a two-layer filtering structure with the electrostatic spinning nanofiber cloth 22. The bimodal distribution morphology includes: a first peak having a diameter in the range: 0.05-0.3 μm; a second peak having a diameter in the range: 3-6 μm. The peak value of the first peak is: 0.15 μm, the peak of the second peak is: 4.5 μm. The fiber ratio of the diameter in the first peak range is as follows: 80%, the ratio of the fibers with the diameter in the second peak range is: 20 percent. In the meltblown nonwoven fabric 21, the average diameter of each fiber was 7 μm.
The first comparison scheme is as follows:
the filtering device 2 comprises an electrostatic spinning nanofiber cloth 22 and a melt-blown non-woven fabric 21, the diameter distribution of each fiber in the electrostatic spinning nanofiber cloth 22 is statistically random, and the diameter range of each fiber in the electrostatic spinning nanofiber cloth 22 is as follows: 0.05 to 6 μm. The meltblown nonwoven fabric 21 was disposed on one side of the electrospun nanofiber sheet 22 to form a two-layer filter structure with the electrospun nanofiber sheet 22, and the average diameter of each fiber in the meltblown nonwoven fabric 21 was 7 μm.
Comparative scheme two:
the filter device 2 includes a double-layer meltblown nonwoven fabric layer 21, and the average diameter of each fiber in the meltblown nonwoven fabric layer 21 is 7 μm.
Further, the above embodiment one, comparative scheme one and comparative scheme two were tested separately: the filtration efficiency and the filtration resistance of the salt aerosol are tested. The test results are shown in table I:
analyzing a specific principle: in one embodiment, for example, the first peak in the electrospun nanofiber cloth 22 comprises, by weight: 80 percent. Second peak, ratio: 20 percent. The first wave crest occupies 80%, forms the main body of the whole electrostatic spinning nanofiber cloth 22, and has a physical barrier effect; the second peak has a larger fiber diameter, which can increase the pore size of the electrospun nanofiber cloth 22, so that the overall bulkiness of the electrospun nanofiber cloth 22 is improved, thereby reducing the respiratory resistance. Further, by controlling the fiber diameter range of the second peak in the electrospun nanofiber cloth 22 to be smaller than or close to the meltblown nonwoven fabric 21, the physical filtration efficiency of the electrospun nanofiber cloth 22 can be always higher than that of the meltblown nonwoven fabric 21, and the aerodynamic performance of the air flow passing through the meltblown nonwoven fabric 21 is not affected; therefore, the physical barrier filtration of the non-woven fabric is matched with the electret effect of the melt-blown non-woven fabric 21, and the optimal barrier and breathing smoothness effect is realized.
In the first comparative example, the diameter distribution of each fiber in the electrospun nanofiber cloth 22 is statistically random, and the filtering effect is decreased and the respiratory resistance is decreased compared with the bimodal distribution in the first embodiment.
In the second comparative example, the double melt-blown nonwoven fabric layer 21 was used for filtration, and the filtration effect was weaker than that of the first embodiment and the first comparative example.
Example 2
Referring to fig. 1 to 5 of the specification, there is provided a mask having a bimodal distribution of electrospun nanofiber cloth, comprising:
the mask body comprises an inner layer and an outer layer, wherein the inner layer is used for fitting the face of a user;
a filter apparatus as described in example 1 disposed between the inner layer and the outer layer;
the melt-blown non-woven fabric is arranged on at least one side of the electrostatic spinning nanofiber cloth to support the electrostatic spinning nanofiber cloth.
Wherein, the outer layer and the inner layer can be both non-woven fabrics.
Likewise, the electrospun nanofiber cloth 22 has a bimodal distribution as shown in fig. 1.
As shown in fig. 2, a preferred embodiment, the meltblown nonwoven fabric 21 is disposed on one side of the electrospun nanofiber cloth 22 to support the electrospun nanofiber cloth 22. When the meltblown nonwoven fabric 21 is a single layer, the meltblown nonwoven fabric 21 and the electrospun nanofiber fabric 22 form a two-layer filter structure, and when the meltblown nonwoven fabric 21 is a plurality of layers, the meltblown nonwoven fabric 21 and the electrospun nanofiber fabric 22 form a multi-layer filter structure. In another embodiment, the meltblown nonwoven 21 may also be disposed on both sides of the electrospun nanofiber cloth 22.
As shown in fig. 3, the surface of the electrospun nanofiber cloth 22 of the present embodiment has a spider-web-shaped microporous structure, and has very complicated changes such as web-shaped communication, hole-inlaid sleeves, and pore channel bending in a three-dimensional structure, so that it has excellent surface filtration performance; wherein, the fiber diameter of the first peak of the electrospun nanofiber cloth 22 is: 0.05-0.3 μm; the fiber diameter of the second peak is: 3-6 μm.
Embodiment two:
the inner layer 12 comprises non-woven fabrics, the outer layer 11 comprises non-woven fabrics, the filtering device 2 comprises an electrostatic spinning nanofiber cloth 22 and a melt-blown non-woven fabric 21, and the diameter distribution of each fiber in the electrostatic spinning nanofiber cloth 22 statistically has a bimodal distribution form. The melt-blown non-woven fabric 21 is arranged on one side of the electrostatic spinning nanofiber cloth 22 to form a two-layer filtering structure with the electrostatic spinning nanofiber cloth 22. The bimodal distribution morphology includes: a first peak having a diameter in the range: 0.05-0.3 μm; a second peak having a diameter in the range: 3-6 μm. The peak value of the first peak is: 0.15 μm, the peak of the second peak is: 4.5 μm. The fiber ratio of the diameter in the first peak range is as follows: 80%, the ratio of the fibers with the diameter in the second peak range is: 20 percent. In the meltblown nonwoven fabric 21, the average diameter of each fiber was 7 μm.
A third comparison scheme:
the inner layer 12 comprises non-woven fabrics, the outer layer 11 comprises non-woven fabrics, the filtering device 2 comprises an electrostatic spinning nanofiber cloth 22 and a melt-blown non-woven fabric 21, the diameter distribution of each fiber in the electrostatic spinning nanofiber cloth 22 is statistically distributed randomly, and the diameter range of each fiber in the electrostatic spinning nanofiber cloth 22 is as follows: 0.05 to 6 μm. The meltblown nonwoven fabric 21 was disposed on one side of the electrospun nanofiber sheet 22 to form a two-layer filter structure with the electrospun nanofiber sheet 22, and the average diameter of each fiber in the meltblown nonwoven fabric 21 was 7 μm.
The fourth comparative scheme is as follows:
the inner layer 12 comprises a nonwoven fabric, the outer layer 11 comprises a nonwoven fabric, and the filter device 2 comprises a double-layer meltblown nonwoven layer 21, wherein the average diameter of each fiber in the meltblown nonwoven layer 21 is 7 μm.
Further, the above embodiment two, the comparison scheme three and the comparison scheme four were tested separately: the filtration efficiency and the filtration resistance of the salt aerosol are tested. The test results are shown in table I:
analyzing a specific principle: in embodiment two, for example, the first peak in the electrospun nanofiber cloth 22, comprises: 80 percent. Second peak, ratio: 20 percent. The first wave crest occupies 80%, forms the main body of the whole electrostatic spinning nanofiber cloth 22, and has a physical barrier effect; the second peak has a larger fiber diameter, which can increase the pore size of the electrospun nanofiber cloth 22, so that the overall bulkiness of the electrospun nanofiber cloth 22 is improved, thereby reducing the respiratory resistance. Further, by controlling the fiber diameter range of the second peak in the electrospun nanofiber cloth 22 to be smaller than or close to the meltblown nonwoven fabric 21, the physical filtration efficiency of the electrospun nanofiber cloth 22 can be always higher than that of the meltblown nonwoven fabric 21, and the aerodynamic performance of the air flow passing through the meltblown nonwoven fabric 21 is not affected; therefore, the physical barrier filtration of the non-woven fabric is matched with the electret effect of the melt-blown non-woven fabric 21, and the optimal barrier and breathing smoothness effect is realized.
In the third comparative example, the diameter distribution of each fiber in the electrospun nanofiber cloth 22 is statistically random, and the filtering effect is decreased and the respiratory resistance is decreased compared with the bimodal distribution in the first embodiment.
In the fourth comparison scheme, the double-layer melt-blown non-woven fabric layer 21 is used as the filtering device 2 of the mask, and the filtering effect is weaker than that of the second embodiment scheme and the third comparison scheme.
Preferably, the mask with electrospun nanofiber cloth according to the present invention further includes a belt body 3: the band 3 is used to hold the mask body 1 on the face of the user.
Preferably, the belt body 3 comprises an ear-hanging type, a binding belt type or a loop type; the mask body 1 may be flat or three-dimensional as required.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A filter device of electrospun nanofiber cloth with bimodal distribution, comprising:
the electrostatic spinning nanofiber cloth is characterized in that the diameter distribution among fibers in the electrostatic spinning nanofiber cloth statistically has a bimodal distribution form;
the melt-blown non-woven fabric is arranged on at least one side of the electrostatic spinning nanofiber cloth and forms a filtering structure with more than two layers with the electrostatic spinning nanofiber cloth;
the bimodal distribution morphology comprises:
a first peak having a diameter in a range of: 0.05-0.3 μm, the ratio of fibers having a diameter in the range of said first peak being: 88 to 92 percent;
a second peak having a diameter in a range of: 3-6 μm, the ratio of fibers having a diameter in the second peak range being: 8 to 12 percent;
the fiber diameter of the second peak is smaller than that of the melt-blown non-woven fabric.
2. The filtration device of electrospun nanofiber cloth with bimodal distribution as claimed in claim 1,
the peak value of the first peak is: 0.15 μm;
the peak value of the second peak is: 4.5 μm.
3. The filtration device of electrospun nanofiber cloth with bimodal distribution as claimed in claim 1,
the melt-blown non-woven fabric is arranged on one side of the electrostatic spinning nanofiber cloth or the melt-blown non-woven fabric is arranged on both sides of the electrostatic spinning nanofiber cloth.
4. An electrospun nanofiber cloth mask having a bimodal distribution, comprising:
the mask body comprises an inner layer and an outer layer, wherein the inner layer is used for fitting the face of a user;
the filter device of any of claims 1-3, disposed between the inner layer and the outer layer;
the melt-blown non-woven fabric is arranged on at least one side of the electrostatic spinning nanofiber cloth to support the electrostatic spinning nanofiber cloth.
5. The mask with the electrospun nanofiber cloth of bimodal distribution according to claim 4, wherein the inner layer comprises a non-woven fabric;
and/or, the outer layer comprises a nonwoven fabric.
6. The mask with the electrospun nanofiber cloth of the bimodal distribution according to claim 4, further comprising a belt body:
the belt body is used for keeping the mask main body on the face of a user.
7. The mask with the electrospun nanofiber cloth of bimodal distribution according to claim 6, characterized in that:
the belt body comprises an ear-hanging type belt binding type belt or a head-covering type belt.
8. The mask of claim 4 wherein said mask body comprises a planar or a three-dimensional form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038644.XA CN112704287A (en) | 2021-01-12 | 2021-01-12 | Filtering device with double-peak distribution for electrostatic spinning nanofiber cloth and mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038644.XA CN112704287A (en) | 2021-01-12 | 2021-01-12 | Filtering device with double-peak distribution for electrostatic spinning nanofiber cloth and mask |
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| CN112704287A true CN112704287A (en) | 2021-04-27 |
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| CN202110038644.XA Pending CN112704287A (en) | 2021-01-12 | 2021-01-12 | Filtering device with double-peak distribution for electrostatic spinning nanofiber cloth and mask |
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| CN204653866U (en) * | 2015-05-18 | 2015-09-23 | 山东俊富无纺布有限公司 | A kind of mouth mask and main body thereof |
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