CN113144753A - High-efficiency air filtration melt-blown material and preparation method thereof - Google Patents
High-efficiency air filtration melt-blown material and preparation method thereof Download PDFInfo
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- CN113144753A CN113144753A CN202110250140.4A CN202110250140A CN113144753A CN 113144753 A CN113144753 A CN 113144753A CN 202110250140 A CN202110250140 A CN 202110250140A CN 113144753 A CN113144753 A CN 113144753A
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- polyamide
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- air filtration
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- 239000000463 material Substances 0.000 title claims abstract description 81
- 238000001914 filtration Methods 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000004952 Polyamide Substances 0.000 claims abstract description 62
- 229920002647 polyamide Polymers 0.000 claims abstract description 62
- 239000002245 particle Substances 0.000 claims abstract description 35
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000006185 dispersion Substances 0.000 claims abstract description 26
- 239000004695 Polyether sulfone Substances 0.000 claims abstract description 25
- 229920006393 polyether sulfone Polymers 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 17
- -1 polypropylene Polymers 0.000 claims abstract description 17
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004743 Polypropylene Substances 0.000 claims abstract description 15
- 229920001155 polypropylene Polymers 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 230000001954 sterilising effect Effects 0.000 claims abstract description 9
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 238000000889 atomisation Methods 0.000 claims abstract description 7
- 239000003999 initiator Substances 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000003851 corona treatment Methods 0.000 claims abstract description 6
- 239000005457 ice water Substances 0.000 claims abstract description 6
- 239000002105 nanoparticle Substances 0.000 claims abstract description 6
- 238000005469 granulation Methods 0.000 claims abstract description 3
- 230000003179 granulation Effects 0.000 claims abstract description 3
- 238000004659 sterilization and disinfection Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 5
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 5
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 5
- 238000007603 infrared drying Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 5
- 239000004626 polylactic acid Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 125000001302 tertiary amino group Chemical group 0.000 claims description 3
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 2
- 238000005576 amination reaction Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 125000004218 chloromethyl group Chemical group [H]C([H])(Cl)* 0.000 claims 1
- 241000894006 Bacteria Species 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000844 anti-bacterial effect Effects 0.000 description 4
- 239000000443 aerosol Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 241000700605 Viruses Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- 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
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a high-efficiency air filtration melt-blown material and a preparation method thereof, chloromethylated polyether sulfone and trimethylamine solution are mixed for polyammonium reaction to prepare positively charged polyammonium polyether sulfone, the polyammonium polyether sulfone, polypropylene master batch and an initiator are added into a granulator for blending granulation and then are melted and extruded, the mixture is cooled by ice water bath and then is cut into particles, the particles are dried to prepare charged modified polyamide master batch, the modified polyamide master batch and polyamide chips are mixed and added into a melt-blowing device for preparing polyamide melt-blown material, the polyamide melt-blown material is put into a corona device for corona treatment, the melt-blown material is cooled and then is put into an ultrasonic atomization nano silver particle dispersion device for carrying nano silver particle dispersion liquid, the melt-blown material is put into a drying device for drying, and then the nano particle-loaded polyamide melt-blown material is prepared, the invention has high filtering efficiency, low filtering resistance and good sterilizing effect.
Description
Technical Field
The invention relates to the technical field of air filtering material preparation, in particular to a high-efficiency air filtering melt-blown material and a preparation method thereof.
Background
The melt-blowing method is a production technique in which high polymer melt is blown by high-temperature air flow, the melt trickles are reduced and the melt is drawn to form fibers, and then the fibers are agglomerated to a porous roller to form the fibers. The polypropylene is the most common melt-blown material, has the advantages of small pore diameter, large specific surface area, high porosity and the like, and is a main filter element layer material of the medical protective mask. The conventional filter element layer for the mask is mainly made of an electret treated polypropylene melt-blown material, and dust, spray and other pollutants in air are trapped by electrostatic adsorption. However, the polypropylene material has a charge attenuation phenomenon, the filtering efficiency of the melt-blown material can be rapidly reduced after the polypropylene material is worn for a long time, the effective filtering time of the conventional polypropylene melt-blown material is 4 hours, the conventional polypropylene melt-blown material does not have the antibacterial capability, and the health of a human body can be influenced by the growth of bacteria on a mask.
In view of the shortcomings of the prior art, a technical solution yet to be solved needs to be provided.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a high-efficiency air filtration melt-blown material and a preparation method thereof, wherein the melt-blown material has a high-efficiency filtration function and an excellent sterilization effect, is beneficial to preventing the propagation of virus and bacteria and can overcome the defects in the prior art.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a high-efficiency air filtration melt-blown material and a preparation method thereof are characterized in that the melt-blown material is a polyamide material, and the method comprises the following steps:
(1) and (3) preparing the poly (aminated polyether sulfone), namely mixing the chloromethylated polyether sulfone with a trimethylamine solution by utilizing the reaction activity of tertiary amino to carry out poly (amination) reaction to prepare the poly (aminated polyether sulfone) with positive charge.
(2) Adding the poly-ammonium polyethersulfone prepared in the step (1), polypropylene master batches and an initiator into a granulator for blending granulation, reacting under certain conditions, melting and extruding, cooling by using an ice water bath, cutting into granules, and drying to prepare the modified polyamide master batches with the charge property.
(3) And (3) mixing the modified polyamide master batch prepared in the step (2) with polyamide chips, and adding the mixture into a melt-blowing device to prepare a polyamide melt-blown material, wherein the pore diameter of a melt-blown spinneret plate is 0.15-0.25 mm, and the melt-blown receiving distance is 10-20 cm.
(4) And (4) placing the polyamide melt-blown material prepared in the step (3) into a corona device for corona treatment, and carrying out corona treatment at a linear speed of 1-20 m/min under a voltage of 30-50 kV.
(5) Cooling the melt-blown material subjected to corona in the step (4), and putting the melt-blown material into an ultrasonic atomization nano silver particle dispersion liquid device to carry out load sterilization on the nano silver particle dispersion liquid;
(6) and (4) drying the melt-blown material loaded with the nano silver particles prepared in the step (5) in a drying device to prepare the nano particle-loaded polyamide melt-blown material.
Further: the chloromethylated polyether sulfone and the trimethylamine solution are mixed according to the mass ratio of 20-70:30-80, and stirred for 12 hours at normal temperature.
Further: the mass ratio of the polypropylene master batch to the poly (ammonified) polyether sulfone to the initiator is 70-90: 20-30: 1-5.
Further: the initiator is one or more of benzoyl peroxide, di-tert-butyl peroxy hexyne and epichlorohydrin.
Further: the granulator is reacted for 2-10 min at the temperature of 210 ℃ and the pressure of 20-100 rpm.
Further: the modified polyamide master batch and the polyamide slices are mixed according to the mass ratio of 20-40: 80-100.
Further: the nano-silver particle dispersion liquid consists of water, sodium dodecyl sulfate, polylactic acid and nano-silver particles, and the mass ratio of the nano-silver particle dispersion liquid to the nano-silver particle dispersion liquid is 80-95: 2-8: 1-5: 0.01-1; the viscosity of the dispersion is 30 to 150 mPas.
Further: the drying device is used for infrared drying.
Further: the thickness of the polyamide melt-blown material is 0.1-1 mm, and the air resistance is 10-80 Pa.
The invention has the beneficial effects that: a high-efficiency air filtering melt-blown material and a preparation method thereof are disclosed, wherein positively charged polyammonium polyether sulfone is used for modifying polyamide master batch by utilizing the reaction activity of tertiary amino to prepare modified polyamide master batch with charge property, the charge property enables polyamide to have strong polarity, therefore, the modified polyamide master batch and the polyamide chips with charge property can be mixed and placed in a melt-blowing device, preparing into polyamide melt-blown material, placing the polyamide melt-blown material into a corona device for corona treatment to enhance the electrostatic action of the polyamide melt-blown material, placing the polyamide melt-blown material into an ultrasonic atomization device, and finally, placing the polyamide melt-blown material loaded with the nano silver particles in an infrared device for drying to obtain the air filtration polyamide melt-blown material with efficient adsorption and sterilization performance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Example 1
Mixing chloromethylated polyether sulfone and trimethylamine solution according to the mass ratio of 20:30, stirring for 12 hours at normal temperature to prepare positively charged polyammonium polyether sulfone, then mixing the prepared polyammonium polyether sulfone, polypropylene master batch and benzoyl peroxide according to the mass ratio of 70:20:1, adding the mixture into a granulator, mixing and granulating, reacting for 8 minutes under the conditions that the temperature of the granulator is 210 ℃ and the pressure is 90rpm, melting and extruding, cooling by using an ice water bath, cutting into granules, and drying to prepare the electrically charged modified polyamide master batch. And then mixing the prepared modified polyamide master batch with polyamide chips according to the mass ratio of 20:80, and adding the mixture into a melt-blowing device to prepare the polyamide melt-blown material. Then, the prepared modified polyamide melt-blown material was placed in a corona device and corona-treated at a linear velocity of 15m/min and a voltage of 50 kV. Then, putting the corona modified polyamide melt-blown material into an ultrasonic atomization nano silver particle dispersion liquid device, carrying out loading sterilization on the nano silver particle dispersion liquid, wherein the nano silver particle dispersion liquid consists of water, sodium dodecyl sulfate, polylactic acid and nano silver particles, the viscosity of the dispersion liquid is 60mPa & s according to the mass ratio of 80:3:2:0.03, then putting the prepared nano silver particle-loaded melt-blown material into an infrared drying device, and drying to obtain the nano particle-loaded polyamide melt-blown material, wherein the thickness of the polyamide melt-blown material is 0.5mm, and the air resistance is 80 Pa.
Example 2
Mixing chloromethylated polyether sulfone and trimethylamine solution according to the mass ratio of 40:60, stirring for 12 hours at normal temperature to prepare poly-ammonified polyether sulfone charged with positive electricity, then mixing the prepared poly-ammonified polyether sulfone, polypropylene master batch and benzoyl peroxide according to the mass ratio of 80:25:3, adding the mixture into a granulator, blending and granulating, reacting for 8 minutes under the conditions that the temperature of the granulator is 210 ℃ and the pressure is 90rpm, melting and extruding, cooling by using an ice water bath, cutting into granules, and drying to prepare the modified polyamide master batch with charge property. And then mixing the prepared modified polyamide master batch with polyamide chips according to the mass ratio of 30:90, and adding the mixture into a melt-blowing device to prepare the polyamide melt-blown material. Then, the prepared modified polyamide melt-blown material was placed in a corona device and corona-treated at a linear velocity of 15m/min and a voltage of 50 kV. Then, putting the corona modified polyamide melt-blown material into an ultrasonic atomization nano-silver particle dispersion liquid device, carrying out loading sterilization on the nano-silver particle dispersion liquid, wherein the nano-silver particle dispersion liquid consists of water, sodium dodecyl sulfate, polylactic acid and nano-silver particles, the nano-silver particle dispersion liquid is mixed according to the mass ratio of 90:6:4:0.05, the viscosity of the dispersion liquid is 90mPa & s, putting the prepared nano-silver particle loaded melt-blown material into an infrared drying device, and drying to obtain the nanoparticle loaded polyamide melt-blown material, wherein the thickness of the polyamide melt-blown material is 0.5mm, and the air resistance is 80 Pa.
Example 3
Mixing chloromethylated polyether sulfone and trimethylamine solution according to the mass ratio of 50:80, stirring for 12 hours at normal temperature to prepare positively charged polyammonium polyether sulfone, then mixing the prepared polyammonium polyether sulfone, polypropylene master batch and benzoyl peroxide according to the mass ratio of 90:30:5, adding the mixture into a granulator, mixing and granulating, reacting for 8 minutes under the conditions that the temperature of the granulator is 210 ℃ and the pressure is 90rpm, melting and extruding, cooling by using an ice water bath, cutting into granules, and drying to prepare the electrically charged modified polyamide master batch. And then mixing the prepared modified polyamide master batch with polyamide chips according to the mass ratio of 40:100, and adding the mixture into a melt-blowing device to prepare the polyamide melt-blown material. Then, the prepared modified polyamide melt-blown material was placed in a corona device and corona-treated at a linear velocity of 15m/min and a voltage of 50 kV. Then, putting the corona modified polyamide melt-blown material into an ultrasonic atomization nano silver particle dispersion liquid device, carrying out loading sterilization on the nano silver particle dispersion liquid, wherein the nano silver particle dispersion liquid consists of water, sodium dodecyl sulfate, polylactic acid and nano silver particles, the nano silver particle dispersion liquid is mixed according to the mass ratio of 95:8:5:1, the viscosity of the dispersion liquid is 120mPa & s, then putting the prepared nano silver particle-loaded melt-blown material into an infrared drying device, and drying to obtain the nanoparticle-loaded polyamide melt-blown material, wherein the thickness of the polyamide melt-blown material is 0.5mm, and the air resistance is 80 Pa.
Comparative example 1
Commercially available polypropylene meltblown materials.
Filterability test
The melt-blown materials prepared in examples 1-3 and comparative example 1 were tested for filtration performance using an automatic TSI8130 filter material tester, the melt-blown materials had filtration efficiencies and filtration resistances of 91.8%, 98.9%, and 99.8% respectively at a flow rate of 70L/min and a mass median diameter of sodium chloride aerosol of 0.26 μm, the filtration resistances of 150Pa, 120Pa, and 80Pa respectively, and after 48 hours of filtration, the filtration efficiencies were still above 8%, and the filtration resistances were below 180 Pa.
Antibacterial property test
The meltblown materials obtained in examples 1 to 3 and comparative example 1 were tested for antibacterial properties using an aerosol generating apparatus, and the resulting test specimens were tested for antibacterial propertiesThe aerosol with bacteria was uniformly sprayed on the surfaces of the meltblown materials prepared in examples 1 to 3 and comparative example 1, after irradiating with simulated sunlight for 10min, the bacteria on the surface of the meltblown material were washed off and transferred to a culture plate for culturing, and the survival rate of the bacteria was calculated by observing the number of bacteria on the culture plate, and the survival rates of different bacteria in examples 1 to 3 and comparative example 1 were 2X10 respectively2、1.5×102、1×102、4×105The bacteriostasis rates are respectively 98.5%, 99.5% and 99.9%.
In conclusion, the nano-silver particle-loaded modified polyamide melt-blown material prepared by the invention has the advantages of high filtration efficiency, low filtration resistance, good sterilization effect and high-efficiency filtration.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. The high-efficiency air filtration melt-blown material and the preparation method thereof are characterized in that the melt-blown material is a polyamide material and comprises the following steps:
(1) preparing poly (aminated polyether sulfone), namely mixing chloromethyl polyether sulfone and trimethylamine solution by utilizing the reaction activity of tertiary amino, and carrying out poly (amination) reaction to prepare the poly (aminated polyether sulfone) with positive charge;
(2) adding the poly-ammonium polyether sulfone prepared in the step (1), polypropylene master batches and an initiator into a granulator for blending granulation, reacting under certain conditions, melting and extruding, cooling by using an ice water bath, cutting into granules, and drying to prepare modified polyamide master batches with charge property;
(3) mixing the modified polyamide master batch prepared in the step (2) with polyamide chips, and adding the mixture into a melt-blowing device to prepare a polyamide melt-blown material, wherein the pore diameter of a melt-blown spinneret plate is 0.15-0.25 mm, and the melt-blown receiving distance is 10-20 cm;
(4) placing the polyamide melt-blown material prepared in the step (3) into a corona device for corona treatment, and carrying out corona treatment at a linear velocity of 1-20 m/min and a voltage of 30-50 kV;
(5) cooling the melt-blown material subjected to corona in the step (4), and putting the melt-blown material into an ultrasonic atomization nano silver particle dispersion liquid device to carry out load sterilization on the nano silver particle dispersion liquid;
(6) and (4) drying the melt-blown material loaded with the nano silver particles prepared in the step (5) in a drying device to prepare the nano particle-loaded polyamide melt-blown material.
2. The efficient air filtration melt-blown material and the preparation method thereof according to claim 1, wherein the chloromethylated polyethersulfone and the trimethylamine solution are mixed according to the mass ratio of 20-70:30-80, and are stirred for 12 hours at normal temperature.
3. The high-efficiency air filtration melt-blown material and the preparation method thereof according to claim 1, wherein the mass ratio of the polypropylene master batch to the poly-ammonium polyether sulfone to the initiator is 70-90: 20-30: 1-5.
4. The high efficiency air filtration melt blown material and the preparation method thereof according to claim 1, wherein the initiator is one or more of benzoyl peroxide, di-tert-butyl peroxy hexyne and epichlorohydrin.
5. The high efficiency air filtration meltblown material of claim 1, wherein: the granulator is reacted for 2-10 min at the temperature of 210 ℃ and the pressure of 20-100 rpm.
6. The high-efficiency air filtration melt-blown material and the preparation method thereof according to claim 1, wherein the modified polyamide master batch and the polyamide chips are mixed according to the mass ratio of 20-40: 80-100.
7. The high-efficiency air filtration melt-blown material and the preparation method thereof according to claim 1, wherein the nano-silver particle dispersion liquid consists of water, sodium dodecyl sulfate, polylactic acid and nano-silver particles in a mass ratio of 80-95: 2-8: 1-5: 0.01-1; the viscosity of the dispersion is 30 to 150 mPas.
8. The high efficiency air filtration meltblown material and method of making the same as claimed in claim 1 wherein said drying means is infrared drying.
9. The high-efficiency air filtration melt-blown material and the preparation method thereof according to claim 1, wherein the polyamide melt-blown material has a thickness of 0.1-1 mm and an air resistance of 10-80 Pa.
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