CN115387024B - Antibacterial melt-blown cloth - Google Patents
Antibacterial melt-blown cloth Download PDFInfo
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- CN115387024B CN115387024B CN202211041136.8A CN202211041136A CN115387024B CN 115387024 B CN115387024 B CN 115387024B CN 202211041136 A CN202211041136 A CN 202211041136A CN 115387024 B CN115387024 B CN 115387024B
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 59
- 239000004744 fabric Substances 0.000 title claims abstract description 27
- 239000004743 Polypropylene Substances 0.000 claims abstract description 37
- 229920001155 polypropylene Polymers 0.000 claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 238000000498 ball milling Methods 0.000 claims abstract description 25
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 23
- 239000002270 dispersing agent Substances 0.000 claims abstract description 18
- -1 polypropylene Polymers 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 16
- 238000007664 blowing Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 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 41
- 239000000843 powder Substances 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 12
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 12
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 229920000098 polyolefin Polymers 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 4
- 229920005633 polypropylene homopolymer resin Polymers 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000009987 spinning Methods 0.000 claims description 3
- 229910008484 TiSi Inorganic materials 0.000 claims description 2
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 230000000845 anti-microbial effect Effects 0.000 claims 9
- 239000004599 antimicrobial Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- 230000009977 dual effect Effects 0.000 abstract description 4
- 241000588724 Escherichia coli Species 0.000 abstract description 3
- 230000000840 anti-viral effect Effects 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
- 229940095731 candida albicans Drugs 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
- 230000001954 sterilising effect Effects 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000001963 growth medium Substances 0.000 description 6
- 239000004745 nonwoven fabric Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 238000009630 liquid culture Methods 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 241000282414 Homo sapiens Species 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
- 239000007787 solid Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 3
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 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
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 235000015278 beef Nutrition 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004927 fusion Effects 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
- 230000001050 lubricating effect 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
- 229920001817 Agar Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000004750 melt-blown nonwoven Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 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
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 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)
- Artificial Filaments (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention relates to an antibacterial melt-blown fabric, which is prepared by taking polypropylene resin as a base material, adding antibacterial resin master batches, ball-milling the antibacterial master batches during preparation, adding a dispersing agent, ball-milling again, mixing with other raw materials, putting into a melt-blowing machine, and performing filament-blowing cooling. Because of the addition of the antibacterial resin master batch, the antibacterial melt-blown cloth has better antibacterial and antiviral effects, and can effectively kill escherichia coli, staphylococcus aureus, candida albicans, influenza virus, hepatitis B virus, new coronavirus 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 a melt-blown non-woven fabric formed by adopting high-speed hot air flow to draw polymer melt trickles extruded by a die head spinneret orifice to form superfine fibers and bonding the superfine fibers. The melt-blown fabric takes polypropylene as a main raw material, the diameter of the superfine fiber can reach 0.5-10 microns, the superfine fiber has a unique capillary structure, and the capillary structure increases the quantity and the surface area of the superfine fiber in unit area, so that the melt-blown fabric has good air filtering property.
The melt-blown cloth is widely applied to the fields of filter materials, medical and health materials, environment protection materials, clothing materials, battery diaphragm materials, wiping materials and the like, has good filterability, and mainly can well block solid particulate matters by utilizing the porous structure and the small round hole technological properties.
However, in daily life, along with the occurrence of new coronal epidemic situation, human health is facing the invasion of various microorganism viruses, and the existing melt-blown cloth with filtering performance is far from meeting the resistance of human beings to the type of biological viruses, and an antibacterial melt-blown cloth with good antibacterial effect and long antibacterial time is needed.
Disclosure of Invention
The present invention aims to solve the problems in the prior art and to provide an antibacterial meltblown fabric. The invention takes polypropylene resin as a base material, adds 15-25% of antibacterial resin master batch, adopts a melt-blowing procedure, and produces antibacterial melt-blown cloth. Because the addition amount of the antibacterial resin master batch is higher, the antibacterial melt-blown cloth has better antibacterial and antiviral effects, and can effectively kill escherichia coli, staphylococcus aureus, candida albicans, influenza virus, hepatitis B virus, new coronavirus and the like within a certain range due to the dual action of the far infrared agent.
The aim of the invention can be achieved by the following scheme:
the invention provides an antibacterial melt-blown fabric, which is prepared by the following steps:
S1, weighing raw materials in parts by weight: 72-85 parts of PP (polypropylene), 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;
s3, throwing the mixture into a melt-blowing machine, and cooling the filaments to obtain the antibacterial melt-blowing cloth.
As one embodiment of the present invention, the PP resin in the step S1 is a homo-polypropylene resin having a melt index of between 1 and 50g/10 min.
As an 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 the PP matrix resin, has good lubricating property, coats and fixes the far infrared emitting agent loaded by the activated carbon, can form a smooth surface on the activated carbon, can improve the rough feeling of the surface of the silk thread caused by the powder of the activated carbon and the far infrared emitting agent in the spinning process, and improves the hand feeling of melt-blown cloth. The dispersant is not excessively used, so that gaps of the activated carbon can be filled, the adsorption effect is reduced, and the good coating effect cannot be achieved if the dispersant is excessively used.
According to the invention, the antibacterial master batch is added, so that the prepared antibacterial melt-blown cloth has the dual effects of antibacterial and antiviral, and bacteria in a certain range can be effectively killed due to the dual effects of the far infrared agent. Meanwhile, PP, polyolefin carbopyrimidine, far infrared emitting agent powder, EPR, active carbon and ethylene-vinyl acetate copolymer are prepared into master batches to be 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 master batch in step S1 is prepared by the following method:
(1) Weighing the following raw materials in parts by weight: 87-93 parts of PP, 5-8 parts of polyolefin carbopyrimidine, 1-2 parts of far infrared emitting agent powder, 1-3 parts of EPR, 2-4 parts of active carbon and 6-8 parts of ethylene-vinyl acetate copolymer;
(2) Mixing far infrared emitting agent powder with active carbon, ball milling, stirring with the rest components to obtain mixture, and melt extrusion granulating to obtain antibacterial master batch.
As one embodiment of the present invention, the PP resin in step (1) is a homo-polypropylene resin having a melt index of between 30 and 50g/10 min; the far-infrared emissive agent powder includes one or more of SiC, tiC, tiB 2、TiSi、SiO2、TiO2. The particle size of the activated carbon is 0.1-0.2mm. The particle size of the far infrared emitting agent powder is 50-100nm.
As one embodiment of the present invention, the ball milling rotation speed in the step (2) is 300-400rpm, and the time is 1-2 hours. The ball milling can make the activated carbon loaded with far infrared emitting agent powder. The temperature of extrusion granulation is 190-230 ℃.
As one embodiment of the present invention, the first ball milling in step S2 is performed at a rotational speed of 450-500rpm for a period of 1-2 hours. The second ball milling speed is 100-120rpm, and the time is 5-6h. The second ball milling with low speed and long time can make the dispersant wrap the antibacterial master batch more completely.
As one embodiment of the present invention, the melt-blowing machine parameters in step S3: screw and die temperature 1801220/deg.C, screw main frequency 15Hz, zone 1 temperature 205 deg.C, receiving distance/15 Cm, zone 2 temperature 220 deg.C, hot air temperature 280 deg.C, zone 3 temperature 230 deg.C, hot air pressure 0.3MPa, flange temperature 230 deg.C, air frequency 43Hz, elbow temperature 230 deg.C.
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 carbopyrimidine and far infrared emitting agent powder are good sterilization components, are added into the product to kill bacteria and viruses carried by human bodies when the human bodies contact the product, and the sterilizing agent molecules contained in the product added with the sterilizing agent can be diffused into the air around the product through the catalysis of the far infrared emitting agent, so that the sterilizing agent has a certain killing effect on bacteria and viruses contained in the air around the mask.
(3) The activated carbon has adsorptivity, can adsorb tiny particles, has large specific surface area of pore structure and large adsorption capacity, and can also be loaded with far infrared emitting agent powder to avoid aggregation. However, the addition of the activated carbon has a great influence on the performance of the PP resin, and the invention adopts the ethylene-vinyl acetate copolymer (EVA) to improve the mixed fusion of the AC in the polypropylene (PP), thereby improving the mechanical property of the PP resin.
(4) The polyolefin carbopyrimidine, EPR and ethylene-vinyl acetate copolymer are blended, and macromolecular chains are wound, so that the influence of granule components such as far infrared emitting agent powder and active carbon on the toughness of PP resin can be effectively reduced, and the flexibility is good.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples, which are presented to provide those of ordinary skill in the art with a detailed description of the invention and to provide a further understanding of the invention, are presented in terms of implementation and operation. It should be noted that the protection scope of the present invention is not limited to the following embodiments, and several adjustments and improvements made on the premise of the inventive concept are all within the protection scope of the present invention.
Example 1
The embodiment provides an antibacterial melt-blown fabric, which is prepared by the following method:
(1) Preparing master batches: 87 parts of PP (melt index 30g/10 min), 5 parts of polyolefin carbopyrimidine, 2 parts of far infrared emitting agent powder SiO 2, 1 part of EPR, 2 parts of activated carbon and 6 parts of ethylene-vinyl acetate copolymer are weighed; the particle size of the active carbon is 0.1mm, and the particle size of the far infrared emitting agent powder is 50nm; mixing far infrared emitting agent powder with active carbon, ball milling at 300rpm for 1 hr, and stirring with the rest components to obtain mixture; melting, extruding and granulating at 200 ℃ to obtain 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 speed of 450rpm for 1h, adding a dispersing agent, performing secondary ball milling at the speed of 100rpm for 5h, and stirring and mixing with PP, the dispersing agent and methyl silicone oil to obtain a mixture;
(3) Feeding the mixture into a melt-blowing machine, and carrying out the following parameters: the temperature of the screw and the die head are 200 ℃, the main frequency of the screw is 15Hz, the temperature of the 1 area is 205 ℃, the receiving distance is 15cm, the temperature of the 2 area is 220 ℃, the temperature of the hot air is 280 ℃, the temperature of the 3 area is 230 ℃, the pressure of the hot air is 0.3MPa, the temperature of the flange is 230 ℃, the air frequency is 43Hz, the temperature of the elbow is 230 ℃, and the antibacterial melt-blown cloth is obtained by spinning and cooling.
Example 2
The embodiment provides an antibacterial melt-blown fabric, which is prepared by the following method:
(1) Preparing master batches: weighing 90 parts of PP (melt index 30g/10 min), 6 parts of polyolefin carbopyrimidine, 2 parts of far infrared emitting agent powder SiO 2, 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 emitting agent powder is 80nm; ; mixing far infrared emitting agent powder with active carbon, ball milling at 300rpm for 1 hr, and stirring with the rest components to obtain mixture; melting, extruding and granulating at 200 ℃ to obtain 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 500rpm for 2 hours, adding a dispersing agent, performing secondary ball milling at 120rpm for 5-6 hours, and stirring and mixing with PP, the dispersing agent and methyl silicone oil to obtain a mixture;
(3) The mixture was fed into a melt-blowing machine, and the parameters were the same as in example 1 to obtain the antibacterial melt-blown fabric.
Example 3
The embodiment provides an antibacterial melt-blown fabric, which is prepared by the following method:
(1) Preparing master batches: 93 parts of PP (melt index 30g/10 min), 8 parts of polyolefin carbopyrimidine, 2 parts of far infrared emitting agent powder SiO 3, 4 parts of activated carbon and 8 parts of ethylene-vinyl acetate copolymer are weighed; the particle size of the active carbon is 0.2mm, and the particle size of the far infrared emitting agent powder is 100nm; mixing far infrared emitting agent powder with active carbon, ball milling at 300rpm for 1 hr, and stirring with the rest components to obtain mixture; melting, extruding and granulating at 200 ℃ to obtain 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 speed of 500rpm for 2 hours, adding a dispersing agent, performing secondary ball milling at the speed of 110rpm for 5 hours, and stirring and mixing with PP, the dispersing agent and methyl silicone oil to obtain a mixture;
(3) The mixture was fed into a melt-blowing machine, and the parameters were the same as in example 1 to obtain the antibacterial melt-blown fabric.
Comparative example 1
This comparative example provides a nonwoven fabric for producing an antibacterial mask, which is basically the same as that of example 1 except that: no polyethylene wax was added.
Comparative example 2
This comparative example provides a nonwoven fabric for producing an antibacterial mask, which is basically the same as that of example 1 except that: the polyethylene wax was replaced with an equivalent amount of oleamide.
Comparative example 3
This comparative example provides a nonwoven fabric for producing an antibacterial mask, which is basically the same as that of example 1 except that: no ethylene-vinyl acetate copolymer was added.
Performance experiment:
And (3) testing the sterilization rate: and (5) selecting escherichia coli to test the sterilization effect.
① Preparing 100mL of liquid culture medium: beef extract 0.3g, sodium chloride 0.5g, peptone 1.0g, water to 100mL, adjusting pH to about 7.2 with 10% sodium hydroxide, and autoclaving at 121deg.C for 20min. 10 mL/bottle of the liquid culture medium was dispensed into 4 bottles, and the remaining 60mL was filled into another bottle.
② Solid medium 400mL: 1.2g of beef extract, 2.0g of sodium chloride, 6.0g of agar powder and 4.0g of peptone, regulating the pH to about 7.2 by using 10% sodium hydroxide, and sterilizing at 121 ℃ for 20min. The configuration amount of the solid culture medium and the number of the culture dishes are determined according to the number of samples to be tested in actual experiments.
③ Primary inoculation: and (3) the isothermal temperature is reduced to about 60 ℃,2 bottles of liquid culture solution are taken out, 112 rings of strains to be detected are added, and the strains are placed into a heating oscillator at 37 ℃ for culture for 32 hours.
④ Secondary inoculation: and respectively transferring 1mL of the cultured bacterial liquid into two other bottles of liquid culture liquid, and placing the two bottles of liquid culture liquid into a heating oscillator for culture for 8 hours.
⑤ Bacterial culture test sterilization rate: the sterilized dishes are prepared and marked. Respectively adding 50 mu L of strain to be detected into a culture dish, pouring a proper amount of solid culture medium into the culture dish to completely cover and shake uniformly, shearing two identical antibacterial non-woven fabric samples for each sample, placing a first piece into the culture medium (contact), and placing a second piece at the upper 5cm of the culture medium (non-contact).
The experimental methods and reading rules of each sample are referred to GB/T20944.2, evaluation of antibacterial Properties of textiles section 2: absorption method.
The test results are as follows
Table 1 results of sterilization rate test of samples of examples
| Sample name | Contact antibacterial rate, percent | Non-contact antibacterial rate, percent |
| 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 far-infrared emitting agent loaded by the activated carbon can not be lubricated and coated without adding a dispersing agent, the dispersibility of the antibacterial component in the PP matrix resin is poor, and under the non-contact condition, such as in the using process of a mask, the far-infrared emitting agent can not be uniformly distributed in the non-woven fabric, so that the sterilizing effect is poor. Although the oleamide has better lubricating performance, the coating effect is poor, and the far infrared emitting agent is easy to separate from the active carbon for aggregation in the preparation process of the non-woven fabric. The ethylene-vinyl acetate copolymer (EVA) improves the mixed fusion of the activated carbon in the polypropylene (PP), and has a certain influence on the dispersibility of the activated carbon, thereby further influencing the effect of the antibacterial component.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (8)
1. An antimicrobial meltblown web, wherein the antimicrobial meltblown web is prepared by a process comprising:
S1, weighing raw materials in parts by weight: 72-85 parts of PP (polypropylene), 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;
s3, throwing the mixture into a melt-blowing machine, and performing spinning cooling to obtain the antibacterial melt-blowing cloth;
In the step S1, the dispersing agent is at least one of polyethylene wax and polypropylene wax;
The antibacterial master batch in the step S1 is prepared by the following method:
(1) Weighing the following raw materials in parts by weight: 87-93 parts of PP, 5-8 parts of polyolefin carbopyrimidine, 1-2 parts of far infrared emitting agent powder, 1-3 parts of EPR, 2-4 parts of active carbon and 6-8 parts of ethylene-vinyl acetate copolymer;
(2) Mixing far infrared emitting agent powder with active carbon, ball milling, stirring with the rest components to obtain mixture, and melt extrusion granulating to obtain antibacterial master batch.
2. The antimicrobial meltblown according to claim 1, wherein the PP resin in step S1 is a homo-polypropylene resin with a melt index between 1 and 50g/10 min.
3. The antimicrobial meltblown according to claim 1, wherein the PP resin in step (1) is a homo-polypropylene resin with a melt index between 30 and 50g/10 min.
4. The antimicrobial meltblown according to claim 1, wherein the far-infrared emissive agent powder in step (1) comprises one or more of SiC, tiC, tiB 2、TiSi、SiO2、TiO2.
5. The antimicrobial meltblown according to claim 1, wherein the ball milling speed in step (2) is 300-400rpm for 1-2 hours.
6. The antimicrobial meltblown according to claim 1, wherein the first ball milling in step S2 is performed at a rotational speed of 450-500rpm for a period of 1-2 hours.
7. The antimicrobial meltblown according to claim 1, wherein the second ball milling in step S2 is performed at a speed of 100-120rpm for a period of 5-6 hours.
8. The antimicrobial meltblown web according to claim 1, wherein the meltblown parameters in step S3: the temperature of the screw and the die head is 180-220/DEGC, the main frequency of the screw is 15Hz, the temperature of the 1 zone is 205 ℃, the receiving distance/15 Cm, the temperature of the 2 zone is 220 ℃, the temperature of hot air is 280 ℃, the temperature of the 3 zone is 230 ℃, the pressure of the hot air is 0.3MPa, the temperature of the flange is 230 ℃, the wind frequency is 43Hz, and the temperature of the elbow is 230 ℃.
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