CN115387024A - Antibacterial melt-blown fabric - Google Patents
Antibacterial melt-blown fabric Download PDFInfo
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- CN115387024A CN115387024A CN202211041136.8A CN202211041136A CN115387024A CN 115387024 A CN115387024 A CN 115387024A CN 202211041136 A CN202211041136 A CN 202211041136A CN 115387024 A CN115387024 A CN 115387024A
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- temperature
- ball milling
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 63
- 239000004744 fabric Substances 0.000 title claims abstract description 34
- 239000004743 Polypropylene Substances 0.000 claims abstract description 39
- 229920001155 polypropylene Polymers 0.000 claims abstract description 34
- 238000000498 ball milling Methods 0.000 claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 29
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 23
- 239000002270 dispersing agent Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 18
- -1 polypropylene Polymers 0.000 claims abstract description 17
- 238000007664 blowing Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 40
- 239000000843 powder Substances 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 12
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 9
- 229920000098 polyolefin Polymers 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 230000000845 anti-microbial effect Effects 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 239000004599 antimicrobial Substances 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 4
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 4
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 4
- 229920005633 polypropylene homopolymer resin Polymers 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- 229910008484 TiSi Inorganic materials 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 241000588724 Escherichia coli Species 0.000 abstract description 3
- 238000009987 spinning Methods 0.000 abstract description 3
- 241000222122 Candida albicans Species 0.000 abstract description 2
- 241000711573 Coronaviridae Species 0.000 abstract description 2
- 241000700721 Hepatitis B virus Species 0.000 abstract description 2
- 241000191967 Staphylococcus aureus Species 0.000 abstract description 2
- 230000000840 anti-viral effect Effects 0.000 abstract description 2
- 229940095731 candida albicans Drugs 0.000 abstract description 2
- 230000009977 dual effect Effects 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 241000712461 unidentified influenza virus Species 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000004745 nonwoven fabric Substances 0.000 description 6
- 239000001963 growth medium Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 241000700605 Viruses Species 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000009630 liquid culture Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 239000003206 sterilizing agent Substances 0.000 description 3
- 239000001888 Peptone Substances 0.000 description 2
- 108010080698 Peptones Proteins 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 235000015278 beef Nutrition 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000011081 inoculation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000019319 peptone Nutrition 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002155 anti-virotic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000030944 contact inhibition Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000004750 melt-blown nonwoven Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/103—Agents inhibiting growth of microorganisms
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/544—Olefin series
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nonwoven Fabrics (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Artificial Filaments (AREA)
Abstract
The invention relates to an antibacterial melt-blown fabric, which is prepared by taking polypropylene resin as a base material and adding antibacterial resin master batches, wherein the antibacterial master batches are subjected to ball milling during preparation, are added with a dispersing agent and then are subjected to ball milling again, are mixed with other raw materials and are put into a melt-blowing machine, and are subjected to spinning and cooling. Due to the addition of the antibacterial resin master batch, the antibacterial melt-blown fabric has better antibacterial and antiviral effects, and can effectively kill escherichia coli, staphylococcus aureus, candida albicans, influenza virus, hepatitis B virus, new corona virus and the like within a certain range due to the dual action of the far infrared agent.
Description
Technical Field
The invention belongs to the field of textile materials, and particularly relates to an antibacterial melt-blown fabric.
Background
The melt-blown fabric is melt-blown non-woven fabric formed by drawing polymer melt thin flow extruded from spinneret orifices by adopting high-speed hot air flow and bonding the superfine fibers. The melt-blown fabric takes polypropylene as a main raw material, the diameter of the superfine fibers can reach 0.5-10 microns, the superfine fibers have unique capillary structures, and the number and the surface area of the superfine fibers in unit area are increased by the capillary structures, so that the melt-blown fabric has good air filtration performance.
The melt-blown fabric is widely applied to the fields of filter materials, medical and health materials, environmental protection materials, clothing materials, battery diaphragm materials, wiping materials and the like, has good filterability, and can well block solid particle substances mainly by utilizing the technological properties of a porous structure and small round holes.
However, in daily life, with the occurrence of new crown blight, human health is facing to the invasion from various microbial viruses, and the existing melt-blown cloth with only filtering performance can not meet the resistance of human to the biological viruses, so that the antibacterial melt-blown cloth with good antibacterial effect and long antibacterial time is needed.
Disclosure of Invention
The invention aims to provide an antibacterial melt-blown fabric aiming at the problems in the prior art. The invention takes polypropylene resin as a base material, adds 15-25% of antibacterial resin master batch, and adopts a melt-blowing procedure to produce the antibacterial melt-blown fabric. The antibacterial melt-blown fabric has better antibacterial and antiviral effects due to the higher addition of the antibacterial resin master batch, and can effectively kill escherichia coli, staphylococcus aureus, candida albicans, influenza virus, hepatitis B virus, new corona virus and the like in a certain range due to the dual action of the far infrared agent.
The purpose of the invention can be realized by the following scheme:
the invention provides an antibacterial meltblown fabric, which is prepared by the following method:
s1, weighing the following raw materials in parts by weight: 72-85 parts of PP, 15-25 parts of antibacterial master batch, 2-3 parts of dispersing agent and 1-2 parts of methyl silicone oil;
s2, performing primary ball milling on the antibacterial master batch, adding a dispersing agent, performing secondary ball milling, and stirring and mixing with PP and methyl silicone oil to obtain a mixture;
and S3, putting the mixture into a melt-blowing machine, and carrying out melt-blowing and cooling to obtain the antibacterial melt-blown fabric.
As an embodiment of the present invention, the PP resin in step S1 is a homopolypropylene resin having a melt index of between 1 and 50g/10 min.
In one embodiment of the present invention, the dispersant in step S1 is at least one of polyethylene wax, polypropylene wax, oleamide, and stearate. Because the addition amount of the master batch is larger, the dispersing agent can increase the dispersibility of the antibacterial component in PP matrix resin, has good lubricating property, coats and fixes the far infrared emitting agent loaded by the activated carbon, and can form a smooth surface on the activated carbon, thereby improving the roughness of the surface of the silk thread caused by the activated carbon and the far infrared emitting agent powder in the spinning process and improving the hand feeling of the melt-blown fabric. The dosage of the dispersant is not excessive, so that the active carbon can be filled in gaps, the adsorption effect is reduced, and if the dosage of the dispersant is too small, a good coating effect cannot be achieved.
The antibacterial melt-blown fabric has the double effects of antibiosis and antivirus by adding the antibacterial master batch, and can effectively kill bacteria in a certain range due to the double effects of the far infrared agent. Simultaneously, PP, polyolefin carbapyrimidine, far infrared emission agent powder, EPR, activated carbon and ethylene-vinyl acetate copolymer are prepared into master batches and added, so that the problem of poor dispersion performance caused by direct mixing with matrix resin is avoided.
As an embodiment of the present invention, the antibacterial mother particle in step S1 is prepared by the following method:
(1) Weighing the following raw materials in parts by weight: 87-93 parts of PP (polypropylene), 5-8 parts of polyolefin carbamidine, 1-2 parts of far infrared emitting agent powder, 1-3 parts of EPR (ethylene-propylene rubber), 2-4 parts of activated carbon and 6-8 parts of ethylene-vinyl acetate copolymer;
(2) Mixing the far infrared emitting agent powder with the active carbon, ball milling, stirring and mixing with the rest components to obtain a mixture, and performing melt extrusion granulation to obtain the antibacterial master batch.
As an embodiment of the invention, the PP resin in the step (1) is a homopolymerized polypropylene resin with the melt index of between 30 and 50g/10 min; the far infrared emission powder comprises SiC, tiC and TiB 2 、TiSi、SiO 2 、TiO 2 One or more of (a). The particle size of the active carbon is 0.1-0.2mm. The particle size of the far infrared emission agent powder is 50-100nm.
As an embodiment of the present invention, the ball milling speed in step (2) is 300-400rpm for 1-2h. The ball milling can load the far infrared emission agent powder into the active carbon. The temperature of extrusion granulation is 190-230 ℃.
As an embodiment of the present invention, the rotation speed of the first ball mill in step S2 is 450-500rpm, and the time is 1-2h. The rotation speed of the second ball milling is 100-120rpm, and the time is 5-6h. The second ball milling at low speed for a long time can lead the dispersing agent to more completely wrap the antibacterial master batch.
As an embodiment of the present invention, the parameters of the meltblowing machine in step S3: the temperature of a screw and a die head is 1801220/DEG C, the dominant frequency of the screw is 15Hz, the temperature of a zone 1 is 205 ℃, the receiving distance is/15Cm, the temperature of a zone 2 is 220 ℃, the temperature of hot air is 280 ℃, the temperature of a zone 3 is 230 ℃, the pressure of the hot air is 0.3MPa, the temperature of a flange is 230 ℃, the air frequency is 43Hz, and the temperature of an elbow is 230 ℃.
Compared with the prior art, the invention has the following beneficial effects:
(1) The production of the antibacterial melt-blown fabric does not change the original production process (feeding-melt-blowing machine-slitting fabric-winding fabric-packaging), does not increase extra production equipment, and is simple, convenient and feasible.
(2) The polyolefin carbapyrimidine and far infrared emitting agent powder are good sterilization components, and are added into the product to kill bacteria and viruses carried by a human body when contacting the product, and sterilizing agent molecules contained in the product added with the sterilizing agent can diffuse into the air around the product through the catalysis of the far infrared emitting agent, so that the sterilizing agent has a certain effect of killing the bacteria and viruses contained in the air around the mask.
(3) The active carbon has adsorbability, can adsorb micro particles, has large specific surface area of pore structure and large adsorption capacity, and can be loaded with far infrared emission agent powder to avoid aggregation. But the addition of the active carbon has great influence on the performance of the PP resin, and the ethylene-vinyl acetate copolymer (EVA) is selected to improve the miscibility of the AC in the polypropylene (PP) and improve the mechanical property of the PP resin.
(4) Polyolefin carbamidine, EPR, ethylene-vinyl acetate copolymer are blended, and the influence of particle components such as far infrared emitting agent powder and active carbon on the toughness of PP resin can be effectively reduced by winding macromolecular chains, so that the PP resin is good in softness.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples, which are set forth to provide a detailed description of the invention and a detailed description of the operation, will help those skilled in the art to further understand the present invention. It should be noted that the protection scope of the present invention is not limited to the following embodiments, and several modifications and improvements made on the premise of the idea of the present invention belong to the protection scope of the present invention.
Example 1
This example provides an antimicrobial meltblown fabric prepared by the following method:
(1) Preparing master batches: weighing 87 parts of PP (melt index of 30g/10 min), 5 parts of polyolefin carbapyrimidine and far infrared emission agent powder SiO 2 1 part, 1 part of EPR, 2 parts of activated carbon and 6 parts of ethylene-vinyl acetate copolymer; the particle size of the active carbon is 0.1mm, and the particle size of the far infrared emission agent powder is 50nm; mixing and ball-milling far infrared emission agent powder and active carbon, wherein the ball-milling rotation speed is 300rpm, the time is 1h, and stirring and mixing the mixture with the rest components to obtain a mixture; performing melt extrusion granulation at 200 ℃ to obtain the antibacterial master batch;
(2) Weighing the following raw materials in parts by weight: 72 parts of PP, 15 parts of antibacterial master batch, 2 parts of polyethylene wax and 1 part of methyl silicone oil; ball-milling the antibacterial master batch at the ball-milling rotation speed of 450rpm for 1h, adding a dispersant, then carrying out secondary ball-milling at the rotation speed of 100rpm for 5h, and stirring and mixing the mixture with PP, the dispersant and methyl silicone oil to obtain a mixture;
(3) Putting the mixture into a melt-blowing machine, wherein the parameters are as follows: the temperature of the screw and a die head is 200 ℃, the dominant frequency of the screw is 15Hz, the temperature of a 1 zone is 205 ℃, the receiving distance is 15cm, the temperature of a 2 zone is 220 ℃, the temperature of hot air is 280 ℃, the temperature of a 3 zone is 230 ℃, the pressure of the hot air is 0.3MPa, the temperature of a flange is 230 ℃, the wind frequency is 43Hz, the temperature of an elbow is 230 ℃, and spinning and cooling are carried out to obtain the antibacterial melt-blown fabric.
Example 2
This example provides an antimicrobial meltblown fabric, prepared by the following method:
(1) Preparing master batches: weighing 90 parts of PP (melt index of 30g/10 min), 6 parts of polyolefin carbamidine and far infrared emission agent powder SiO 2 1 part, 2 parts of EPR, 3 parts of activated carbon and 7 parts of ethylene-vinyl acetate copolymer; the particle size of the active carbon is 0.1mm, and the particle size of the far infrared emission agent powder is 80nm; (ii) a Mixing and ball-milling far infrared emission agent powder and activated carbon, wherein the ball-milling rotation speed is 300rpm, the ball-milling rotation speed is 1h, and stirring and mixing the mixture with the rest components to obtain a mixture; performing melt extrusion granulation at 200 ℃ to obtain the antibacterial master batch;
(2) Weighing the following raw materials in parts by weight: 85 parts of PP, 25 parts of antibacterial master batch, 3 parts of polyethylene wax and 2 parts of methyl silicone oil; ball-milling the antibacterial master batch at the ball-milling rotation speed of 500rpm for 2 hours, adding a dispersant, then carrying out secondary ball-milling at the rotation speed of 120rpm for 5-6 hours, and stirring and mixing the mixture with PP, the dispersant and methyl silicone oil to obtain a mixture;
(3) And putting the mixture into a melt-blowing machine, wherein the parameters are the same as those in the example 1, and obtaining the antibacterial melt-blown fabric.
Example 3
This example provides an antimicrobial meltblown fabric, prepared by the following method:
(1) Preparing master batch: 93 parts of PP (melt index of 30g/10 min), 8 parts of polyolefin carbamidine and far infrared emission agent powder SiO 2 2 parts of EPR 3 parts, 4 parts of activated carbon and 8 parts of ethylene-vinyl acetate copolymer; the grain diameter of the active carbon is 0.2mm, and the grain diameter of the far infrared emission agent powder is 100nm; mixing and ball-milling far infrared emission agent powder and active carbon, wherein the ball-milling rotation speed is 300rpm, the time is 1h, and stirring and mixing the mixture with the rest components to obtain a mixture; performing melt extrusion granulation at 200 ℃ to obtain the antibacterial master batch;
(2) Weighing the following raw materials in parts by weight: 80 parts of PP, 20 parts of antibacterial master batch, 3 parts of polypropylene wax and 2 parts of methyl silicone oil; ball-milling the antibacterial master batch at the ball-milling rotation speed of 500rpm for 2h, adding a dispersing agent, then carrying out secondary ball-milling at the rotation speed of 110rpm for 5h, and stirring and mixing with PP, the dispersing agent and methyl silicone oil to obtain a mixture;
(3) And putting the mixture into a melt-blowing machine, wherein the parameters are the same as those in the example 1, and obtaining the antibacterial melt-blown fabric.
Comparative example 1
This comparative example provides a nonwoven fabric for use in the production of an antibacterial mask, which was prepared in substantially the same manner as in example 1, except that: polyethylene wax was not added.
Comparative example 2
This comparative example provides a nonwoven fabric for producing an antibacterial mask, which was prepared in substantially the same manner as in example 1 except that: the polyethylene wax was replaced with an equal amount of oleamide.
Comparative example 3
This comparative example provides a nonwoven fabric for use in the production of an antibacterial mask, which was prepared in substantially the same manner as in example 1, except that: no ethylene vinyl acetate copolymer was added.
Performance experiments:
and (3) testing the sterilization rate: and selecting escherichia coli for testing the bactericidal effect.
(1) Preparing 100mL of liquid culture medium: 0.3g of beef extract, 0.5g of sodium chloride and 1.0g of peptone, adding water to 100mL, adjusting the pH to about 7.2 by using 10% sodium hydroxide, and autoclaving at 121 ℃ for 20min. The liquid medium was dispensed into 4 bottles at a rate of 10 mL/bottle, and the remaining 60mL was filled into another bottle.
(2) Solid medium 400mL: beef extract 1.2g, sodium chloride 2.0g, agar powder 6.0g, peptone 4.0g, pH 7.2 adjusted with 10% sodium hydroxide, and autoclaving at 121 deg.C for 20min. The configuration amount of the solid culture medium and the number of culture dishes are determined according to the number of samples to be tested in the actual experiment.
(3) Primary inoculation: when the temperature is reduced to about 60 ℃,2 bottles of liquid culture solution are taken out, 112 rings of strains to be tested are added, and the mixture is put into a heating oscillator at 37 ℃ for culturing for 32 hours.
(4) Secondary inoculation: transferring 1mL of the cultured bacterial liquid into the other two bottles of liquid culture solution, and culturing for 8h in a heating shaker.
(5) Bacterial culture test bactericidal rate: the sterilized petri dish is prepared and marked. Adding 50 mu L of strain to be detected into the culture dish respectively, pouring a proper amount of solid culture medium into the culture dish to completely cover and shake the culture dish uniformly, shearing two identical antibacterial non-woven fabric samples for each sample, placing the first piece into the culture medium (contact), and placing the second piece into the position 5cm above the culture medium (non-contact).
The experimental method and the reading rule of each sample refer to GB/T20944.2 evaluation 2 part of antibacterial performance of textiles: absorption method ].
The test results are as follows
TABLE 1 results of bactericidal ratio test of samples of examples
| Name of sample | Contact inhibition rate of bacteria% | Non-contact bacteriostasis rate of% |
| Example 1 | 99.68 | 96.65 |
| Example 2 | 99.98 | 96.73 |
| Example 3 | 99.99 | 97.88 |
| Comparative example 1 | 88.45 | 71.23 |
| Comparative example 2 | 85.67 | 79.66 |
| Comparative example 3 | 86.88 | 73.98 |
The addition of a dispersing agent is not needed, the far infrared emitting agent loaded by the lubricating and coating fixed active carbon can not be achieved, the dispersibility of the antibacterial component in PP matrix resin is poor, the far infrared emitting agent can not be uniformly distributed in non-woven fabrics under the non-contact condition, such as the use process of the mask, and the sterilization effect is poor. Although the lubricating property of the oleamide is good, the coating effect is not good, and the far infrared emitting agent is easy to separate from the activated carbon and gather in the preparation process of the non-woven fabric. The ethylene-vinyl acetate copolymer (EVA) is used for improving the miscibility of the activated carbon in the polypropylene (PP) and has certain influence on the dispersibility of the activated carbon, so that the effect of the antibacterial component is further influenced.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. An antimicrobial meltblown fabric, characterized in that it is prepared by a process comprising:
s1, weighing the following raw materials in parts by weight: 72-85 parts of PP, 15-25 parts of antibacterial master batch, 2-3 parts of dispersing agent and 1-2 parts of methyl silicone oil;
s2, carrying out primary ball milling on the antibacterial master batch, adding a dispersing agent, carrying out secondary ball milling, and stirring and mixing with PP and methyl silicone oil to obtain a mixture;
and S3, putting the mixture into a melt-blowing machine, and carrying out melt-blowing and cooling to obtain the antibacterial melt-blown fabric.
2. The antibacterial meltblown fabric according to claim 1, wherein the PP resin in step S1 is a homopolypropylene resin having a melt index of 1-50 g/10 min.
3. The antimicrobial meltblown of claim 1 wherein the dispersant is at least one of polyethylene wax, polypropylene wax, oleamide, and stearate in step S1.
4. The antibacterial meltblown fabric according to claim 1, wherein the antibacterial masterbatch in step S1 is prepared by the following method:
(1) Weighing the following raw materials in parts by weight: 87-93 parts of PP (polypropylene), 5-8 parts of polyolefin carbapyrimidine, 1-2 parts of far infrared emitting agent powder, 1-3 parts of EPR (ethylene-propylene rubber), 2-4 parts of activated carbon and 6-8 parts of ethylene-vinyl acetate copolymer;
(2) Mixing the far infrared emitting agent powder with the active carbon, ball milling, stirring and mixing with the rest components to obtain a mixture, and performing melt extrusion granulation to obtain the antibacterial master batch.
5. The antibacterial meltblown fabric according to claim 4, wherein the PP resin in step (1) is a homopolypropylene resin having a melt index of 30-50 g/10 min.
6. The antibacterial meltblown of claim 4, wherein the powder of far infrared emitting agent in step (1) comprises SiC, tiC, tiB 2 、TiSi、SiO 2 、TiO 2 One or more of (a).
7. The antibacterial meltblown fabric according to claim 4, wherein in step (2) the ball milling speed is 300-400rpm for 1-2 hours.
8. The antibacterial meltblown according to claim 1, wherein the first ball milling in step S2 is performed at a speed of 450 to 500rpm for 1 to 2 hours.
9. The antibacterial meltblown fabric according to claim 1, wherein the second ball milling in step S2 is performed at a speed of 100-120rpm for 5-6 hours.
10. The antimicrobial meltblown fabric of claim 1 wherein the meltblown parameters in step S3 are: the temperature of the screw and a die head is 1801220/DEG C, the dominant frequency of the screw is 15Hz, the zone 1 temperature is 205 ℃, the receiving distance is 15Cm, the zone 2 temperature is 220 ℃, the hot air temperature is 280 ℃, the zone 3 temperature is 230 ℃, the hot air pressure is 0.3MPa, the flange temperature is 230 ℃, the air frequency is 43Hz, and the elbow temperature is 230 ℃.
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