CN112376164B - Melt-blown non-woven fabric for biomass antivirus and bacteriostatic mask and preparation method thereof - Google Patents

Melt-blown non-woven fabric for biomass antivirus and bacteriostatic mask and preparation method thereof Download PDF

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CN112376164B
CN112376164B CN202011173520.4A CN202011173520A CN112376164B CN 112376164 B CN112376164 B CN 112376164B CN 202011173520 A CN202011173520 A CN 202011173520A CN 112376164 B CN112376164 B CN 112376164B
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melt
mixed solution
blown
preparation
woven fabric
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CN112376164A (en
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黄文胜
刘雨佳
谢国东
黄志国
李凯
荆晓飞
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Dongying Junfu Purification Technology Co ltd
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Dongying Junfu Purification Technology Co ltd
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    • 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
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/12—Stretch-spinning methods
    • D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
    • 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
    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
    • 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
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/12—Aldehydes; Ketones
    • D06M13/127—Mono-aldehydes, e.g. formaldehyde; Monoketones
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/144—Alcohols; Metal alcoholates
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/144—Alcohols; Metal alcoholates
    • D06M13/148—Polyalcohols, e.g. glycerol or glucose
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
    • D06M13/207—Substituted carboxylic acids, e.g. by hydroxy or keto groups; Anhydrides, halides or salts thereof
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    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups

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  • Chemical & Material Sciences (AREA)
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  • Nonwoven Fabrics (AREA)
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Abstract

The invention provides a biomass antivirus and bacteriostatic melt-blown non-woven fabric for a mask and a preparation method thereof, wherein the preparation method comprises the following steps: the adopted raw materials comprise PP melt-blown material, polyolefin copolymer, chitosan, nano titanium oxide, nano silicon dioxide and ursolic acid. Mixing chitosan and ursolic acid, and dissolving in distilled water to obtain a first mixed solution; heating the first mixed solution to 50-55 ℃, and preserving the heat for 10-15min; then mixing the first mixed solution with nano titanium oxide and nano silicon dioxide to obtain a second mixed solution; then, carrying out ultrasonic treatment on the second mixed solution to obtain a third mixed solution; and drying the third mixed solution, and introducing the dried solid into mixing equipment for melt blending to obtain the melt-blown master batch. The melt-blown non-woven fabric prepared by the invention has the effects of long-acting antivirus and bacteriostasis, and has the advantages of small ventilation resistance, good liquid barrier property and good filtering property.

Description

Melt-blown non-woven fabric for biomass antivirus and bacteriostatic mask and preparation method thereof
Technical Field
The invention belongs to the technical field of non-woven fabrics, and particularly relates to a melt-blown non-woven fabric for a biomass antivirus and bacteriostatic mask and a preparation method thereof.
Background
The transmission of infectious diseases includes three elements, namely, the source of infection, the transmission route and the susceptible person. Therefore, to control the spread of infectious diseases, it is necessary to control the source of infection, cut off the transmission route and control the susceptible person. The infection source is controlled mainly by finding out the virus carrier to effectively isolate the virus carrier and cut off the infection source, and the measure is effective at the initial stage of the infectious disease; the control transmission path is mainly to determine the transmission path of the infectious diseases through analysis and control the infectious diseases, mainly to control the individual health dietary habits, to wash hands on duty, to prevent the public places from gathering, to wear protective masks and the like; the most effective means for controlling susceptible persons at present is to inoculate antibody vaccine to the susceptible persons to make the susceptible persons generate antibody, etc. However, the development and clinical experiments of vaccines require a certain period to come into the market, which is actually the most serious stage of infectious disease transmission, and the most effective way in the period is to cut off the transmission source and control the transmission path.
For people, the mask is worn for well protection, and is an effective method for preventing transmissible respiratory diseases such as droplets, aerosol and the like. The common mask does not have the function of virus prevention, even 20 layers of common cotton and gauze masks can not effectively prevent viruses, and the mask with the interlayer made of the specially treated melt-blown non-woven fabric has a good virus prevention effect.
The melt-blown non-woven fabric in the prior art has weak antibacterial and antiviral properties, large ventilation resistance, poor liquid barrier property and unsatisfactory filtering property.
Disclosure of Invention
The invention aims to solve the technical problems and provides a melt-blown non-woven fabric for a biomass antivirus and bacteriostatic mask and a preparation method thereof, so that the following aims are achieved:
the antibacterial and antiviral performance, the filtering performance and the barrier performance of the melt-blown non-woven fabric are obviously improved, and the ventilation resistance of the material is effectively reduced.
The technical scheme adopted by the invention is as follows:
a preparation method of a melt-blown non-woven fabric for a biomass antivirus and bacteriostatic mask comprises the following steps:
step 1, raw material preparation
The raw materials comprise PP melt-blown material, polyolefin copolymer, chitosan, nano titanium oxide, nano silicon dioxide and ursolic acid, and the mass ratio is 70-75:10-13:1-2:0.2-0.4:0.1-0.15:0.5-0.9; the PP melt-blown material comprises the following components: MFR range 1300-1800 g/10min;
the polyolefin copolymer: ethylene, propylene copolymer, ethylene: the mass ratio of the propylene is 1.
The chitosan: the content of effective components is 95%, and the water content is lower than 4%.
The nano titanium oxide: particle size of 20nm, tiO 2 91-92% of the total weight and 0.4g/cm of bulk density 3 ；
The nano silicon dioxide: particle size of 20nm, siO 2 99 percent of content and 0.10g/cm of bulk density 3 ；
The ursolic acid: the granularity is 200 meshes, and the content of active ingredients is 95 percent.
Step 2, preparing the master batch
Mixing chitosan and ursolic acid, dissolving in distilled water to obtain a first mixed solution, heating the first mixed solution to 50-55 deg.C, and keeping the temperature for 10-15min; the amount of the distilled water is 5-6 times of the total mass of the chitosan and the ursolic acid;
then mixing the first mixed solution with nano titanium oxide and nano silicon dioxide, starting stirring, and stirring at 2000rpm for 20-30min to obtain a second mixed solution;
then carrying out ultrasonic treatment on the second mixed solution for 3 times at an ultrasonic power of 20-50Kw, wherein the ultrasonic treatment time is 2-2.5min each time, and the ultrasonic treatment interval is 1-1.5min, and obtaining a third mixed solution after treatment;
drying the third mixed solution at 70-75 deg.C for 3.5-4h, and drying at 40-45 deg.C until the water content of the solid is lower than 7%;
and introducing the dried solid into mixing equipment for melt blending to prepare melt-blown master batch, wherein the blending temperature is 190-210 ℃, the blending time is 3-8min, and the rotating speed is 45-50rpm.
Step 3, melt extrusion
At the feed end of the extruder, polypropylene chips and powder are fully mixed and then enter a screw extruder to be heated into a melt, and finally the melt is fed into a spinneret plate through a metering pump and a filter. The temperature of a screw rod adopted for melt extrusion is 230-245 ℃, the temperature of a melt pipe is 240-260 ℃, and the temperature of a die head is 260-270 ℃. In the melt blowing process, the extruder also typically reduces the molecular weight of the polypropylene by shearing and thermal degradation.
Step 4, fiber drafting
After the melt-blown master batch is melted and extruded, the filtered clean melt is uniformly fed into each group of spinneret plates through a distribution system, so that the extrusion amount of each spinneret hole is consistent. The molten polymer filament extruded from the spinneret orifice is quickly thinned and elongated under the impact of high-speed hot air flow at two sides, and is drafted by hot air to form superfine fiber with the diameter of 0.7-1 mu m. Hot air quantity 4400-4600m 3 The hot air temperature is 270-280 ℃.
Step 5, bonding into a net
Spraying superfine fiber onto the net forming curtain, and adhering the fiber to the net forming curtain via sucking air from the bottom of the net, wherein the sucking air flow is 1300-1500m 3 /h。
Step 6, electrostatic addition
The web-formed melt-blown non-woven fabric is electrostatically charged through an electrostatic field formed by an electrostatic generator, the voltage of the electrostatic generator is 30-50V, and the current is 20-30A.
Step 7, slitting and winding
After hot rolling and reinforcing, the steel plate is cut into required width and wound into a coiled material.
Step 8, after finishing
a) Mixing of oil solutions
The adopted oil agent raw materials comprise glycerol, ethanol, sodium lactate, dandelion extract and deionized water, and the mass ratio is 6-7:2-2.5:1-1.4:0.2-0.3:9-11; the herba Taraxaci extract contains flavonoid 4.5-4.6%. The oil agent raw materials are fully mixed at the temperature of 45-50 ℃.
b) Oiling
Uniformly oiling the cloth surface of the non-woven fabric, wherein the liquid carrying capacity of the cloth surface is 90-100%, and removing redundant liquid from the wetted cloth surface through a pair of rolling rolls.
c) Drying by baking
Drying the non-woven fabric under the action of hot air at the drying temperature of 128-135 ℃ for 50-55 seconds.
d) Slitting and rolling
Cutting into appropriate width by a cutter, and winding into coils.
The technical scheme of the invention has the following beneficial effects:
(1) The melt-blown non-woven fabric prepared by the invention has long-acting antiviral and bacteriostatic effects, can effectively resist influenza viruses A, B and C and COVID-19 viruses, and has better bacteriostatic effects on escherichia coli, staphylococcus aureus and candida albicans.
(2) The melt-blown non-woven fabric prepared by the invention has the antistatic water pressure average value of 70-80cmH 2 O。
(3) The melt-blown non-woven fabric prepared by the invention has stable high and low temperature aging attenuation indexes, the impedance of the prepared mask is as low as 45Pa as detected according to NIOSH Standards (Title 42 CFR Part 84) standard, the impedance is far higher than the requirement of 350Pa in the standard, the filtering efficiency reaches 99.5-99.6%, and the product quality is stable and reliable.
(4) The anti-blood penetration function of the melt-blown non-woven fabric prepared by the invention is far higher than the anti-blood penetration index of 80mmHg in the GB19083-2010 standard, and the anti-blood penetration capability reaches 160mmg capability.
Detailed Description
The present application will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example 1 preparation method of melt-blown nonwoven fabric for biomass antivirus and bacteriostatic mask
The method comprises the following steps:
step 1, raw material preparation
The raw materials comprise PP melt-blown material, polyolefin copolymer, chitosan, nano titanium oxide, nano silicon dioxide and ursolic acid, and the mass ratio is 70:10:1:0.2:0.1:0.5; the PP melt-spraying material comprises the following components: MFR range 1300-1800 g/10min;
the polyolefin copolymer: ethylene, propylene copolymer, ethylene: the mass ratio of the propylene is 1.
The chitosan: the content of effective components is 95%, and the water content is lower than 4%.
The nano titanium oxide: particle size of 20nm, tiO 2 91-92% of the total weight and 0.4g/cm of bulk density 3 ；
The nano-silica: particle size of 20nm, siO 2 99 percent of content and 0.10g/cm of bulk density 3 ；
The ursolic acid: the granularity is 200 meshes, and the content of active ingredients is 95 percent.
Step 2, preparing the master batch
Mixing chitosan and ursolic acid, dissolving in distilled water to obtain a first mixed solution, heating to 50 deg.C, and maintaining the temperature for 15min; the amount of the distilled water is 5 times of the total mass of the chitosan and the ursolic acid;
then mixing the first mixed solution with nano titanium oxide and nano silicon dioxide, starting stirring, and stirring at 2000rpm for 30min to obtain a second mixed solution;
then, carrying out ultrasonic treatment on the second mixed solution for 3 times at an ultrasonic power of 20Kw, wherein the ultrasonic treatment time is 2.5min each time, and the ultrasonic treatment interval is 1min, so as to obtain a third mixed solution after treatment;
drying the third mixed solution at 70 ℃ for 4h, and then drying at 40 ℃ until the water content of the solid is lower than 7%;
and (3) introducing the dried solid into mixing equipment for melt blending to prepare melt-blown master batch, wherein the blending temperature is 190 ℃, the blending time is 3min, and the rotating speed is 50rpm.
Step 3, melt extrusion
At the feed end of the extruder, the melt-blown masterbatch enters a screw extruder, is heated to form a melt, and finally is fed into a spinneret plate through a metering pump and a filter. The screw temperature used for melt extrusion was 245 ℃, the melt pipe temperature was 260 ℃ and the die head temperature was 268 ℃. In the melt-blowing process, the extruder also typically lowers the molecular weight of the polypropylene by shearing and thermal degradation.
Step 4, drawing the fiber
After the melt-blown master batch is melted and extruded, the filtered clean melt is uniformly fed into each group of spinneret plates through a distribution system, so that the extrusion amount of each spinneret hole is consistent. The molten polymer filaments extruded from the spinneret holes are rapidly thinned and elongated under the impact of high-speed hot air flows on two sides, and are subjected to hot air drafting to form superfine fibers with the diameter of 0.7 mu m. Hot air volume 4600m 3 H, hot air temperature 278 ℃.
Step 5, bonding into a net
Spraying superfine fiber onto the net forming curtain, adhering the fiber onto the net forming curtain via sucking air from the bottom of the net, and forming net with sucking air flow rate of 1450m 3 /h。
Step 6, electrostatic addition
The web-formed melt-blown non-woven fabric is electrostatically charged through an electrostatic field formed by an electrostatic generator, wherein the voltage of the electrostatic generator is 45V, and the current is 30A.
Step 7, slitting and winding
After hot rolling and reinforcing, the steel plate is cut into required width and wound into a coiled material.
Step 8, after finishing
a) Mixing of oil solutions
The adopted oil agent raw materials comprise glycerol, ethanol, sodium lactate, dandelion extract and deionized water, and the mass ratio is 6:2:1:0.2:9; the dandelion extract contained 4.5% flavonoids. The oil raw materials are fully mixed at the temperature of 45 ℃.
b) Oiling
The cloth surface of the non-woven fabric is evenly oiled, the liquid carrying capacity of the cloth surface is 90%, and the wet cloth surface is rolled by a pair of rollers to remove redundant liquid.
c) Drying the mixture
Drying the non-woven fabric under the action of hot air at the drying temperature of 128 ℃ for 50 seconds.
d) Slitting and rolling
Cutting into appropriate width by a cutter, and winding into coils.
The melt-blown non-woven fabric prepared by the embodiment has long-acting antiviral and bacteriostatic effects, can effectively resist influenza A virus, influenza B virus, influenza C virus and COVID-19 virus within 3 years of storage time, and has good bacteriostatic effects on escherichia coli, staphylococcus aureus and candida albicans; wherein, the bacteriostasis rate to colibacillus is 99.0 percent, the bacteriostasis rate to staphylococcus aureus is 99.1 percent, and the bacteriostasis rate to candida albicans is 99.0 percent.
Antistatic water pressure mean value of melt-blown non-woven fabric of 76cmH prepared in this example 2 O。
The melt-blown non-woven fabric prepared by the embodiment is prepared into a mask, the impedance is as low as 48Pa and the 0.3 particle filtration efficiency reaches 99.6 percent according to NIOSH Standards (Title 42 CFR Part 84) standard detection; the blood penetration resistance is tested according to the GB19083-2010 standard and reaches 160mmHg.
Embodiment 2 preparation method of melt-blown nonwoven fabric for biomass antivirus and bacteriostatic mask
The method comprises the following steps:
step 1, preparation of raw materials
The raw materials comprise PP melt-blown material, polyolefin copolymer, chitosan, nano titanium oxide, nano silicon dioxide and ursolic acid, and the mass ratio is 73:11:1.5:0.3:0.12:0.7 of the total weight of the mixture; the PP melt-spraying material comprises the following components: MFR range 1300-1800 g/10min;
the polyolefin copolymer: ethylene, propylene copolymer, ethylene: the mass ratio of the propylene is 1.
The chitosan: the content of effective components is 95%, and the water content is lower than 4%.
The nano titanium oxide: particle size of 20nm, tiO 2 91-92% of the total weight and 0.4g/cm of bulk density 3 ；
The nano-silica: particle size of 20nm, siO 2 99 percent of content and 0.10g/cm of bulk density 3 ；
The ursolic acid: the granularity is 200 meshes, and the content of active ingredients is 95 percent.
Step 2, preparing the master batch
Mixing chitosan and ursolic acid, dissolving in distilled water to obtain a first mixed solution, heating to 55 deg.C, and keeping the temperature for 13min; the amount of the distilled water is 5.5 times of the total mass of the chitosan and the ursolic acid;
then mixing the first mixed solution with nano titanium oxide and nano silicon dioxide, starting stirring, and stirring at 2000rpm for 25min to obtain a second mixed solution;
then, carrying out ultrasonic treatment on the second mixed solution for 3 times at an ultrasonic power of 40Kw, wherein the ultrasonic treatment time is 2min each time, and the ultrasonic treatment interval is 1.5min, and obtaining a third mixed solution after treatment;
drying the third mixed solution at 75 deg.C for 3.5h, and drying at 45 deg.C until the water content of the solid is lower than 7%;
and (3) introducing the dried solid into mixing equipment for melt blending to prepare melt-blown master batch, wherein the blending temperature is 200 ℃, the blending time is 5min, and the rotating speed is 48rpm.
Step 3, melt extrusion
At the feed end of the extruder, the polypropylene chips and the powder are fully mixed and then enter the screw extruder to be heated into a melt, and finally the melt is fed into a spinneret plate through a metering pump and a filter. The screw temperature adopted for melt extrusion is 240 ℃, the melt pipe temperature is 250 ℃, and the die head temperature is 265 ℃. In the melt blowing process, the extruder also typically reduces the molecular weight of the polypropylene by shearing and thermal degradation.
Step 4, drawing the fiber
After the melt-blown master batch is melted and extruded, the filtered clean melt is uniformly fed into each group of spinneret plates through a distribution system, so that the extrusion amount of each spinneret hole is consistent. The molten polymer filaments extruded from the spinneret holes are rapidly thinned and elongated under the impact of high-speed hot air flows on two sides, and are subjected to hot air drafting to form superfine fibers with the diameter of 0.8 mu m. The hot air quantity is 4500m3/h, and the hot air temperature is 275 ℃.
Step 5, bonding into a net
Spraying superfine fiber onto the net forming curtain, and adhering the fiber to the net forming curtain via air suction at the bottom of the net to form net with air suction flow rate of 1400m 3 /h。
Step 6, electrostatic addition
The web-formed melt-blown non-woven fabric is electrostatically charged through an electrostatic field formed by an electrostatic generator, wherein the voltage of the electrostatic generator is 40V, and the current is 25A.
Step 7, slitting and winding
Hot rolling, reinforcing, cutting into required width, and rolling to obtain coiled material.
Step 8, after finishing
a) Mixing of oil solutions
The adopted oil agent raw materials comprise glycerol, ethanol, sodium lactate, dandelion extract and deionized water, and the mass ratio is 7: 2.5: 1.4: 0.3: 11; the dandelion extract contains 4.6% flavonoids. The oil raw materials are fully mixed at 50 ℃.
b) Oiling
The cloth surface of the non-woven fabric is evenly oiled, the liquid content of the cloth surface is 100%, and the wetted cloth surface is rolled by a pair of rollers to remove the redundant liquid.
c) Drying by baking
Drying the non-woven fabric under the action of hot air, wherein the drying temperature is 135 ℃, and the drying time is 55 seconds.
d) Slitting and winding
Cutting into appropriate width by a cutter, and winding into coils.
The melt-blown non-woven fabric prepared by the embodiment has long-acting antiviral and bacteriostatic effects, can effectively resist influenza A virus, influenza B virus, influenza C virus and COVID-19 virus within 3 years of storage time, and has good bacteriostatic effects on escherichia coli, staphylococcus aureus and candida albicans; wherein, the bacteriostasis rate to colibacillus is 99.3 percent, the bacteriostasis rate to staphylococcus aureus is 99.3 percent, and the bacteriostasis rate to candida albicans is 99.2 percent.
Melt-blown non-woven fabric antistatic water pressure mean value 75cmH prepared by the embodiment 2 O。
The melt-blown non-woven fabric prepared by the embodiment is prepared into a mask, the impedance is as low as 46Pa according to NIOSH Standards (Title 42 CFR Part 84) standard detection, and the 0.3 particle filtration efficiency reaches 99.5%; the blood penetration resistance is tested according to the GB19083-2010 standard and reaches 160mmHg.
Embodiment 3 preparation method of melt-blown nonwoven fabric for biomass antivirus and bacteriostatic mask
The method comprises the following steps:
step 1, preparation of raw materials
The raw materials comprise PP melt-blown material, polyolefin copolymer, chitosan, nano titanium oxide, nano silicon dioxide and ursolic acid, and the mass ratio is 75: 13: 2: 0.4: 0.15: 0.9; the PP melt-blown material comprises the following components: MFR range 1300-1800 g/10min;
the polyolefin copolymer: ethylene, propylene copolymer, ethylene: the mass ratio of the propylene is 1.
The chitosan: the content of effective components is 95%, and the water content is lower than 4%.
The nano titanium oxide: particle size of 20nm, tiO 2 91-92% of the total weight and 0.4g/cm of bulk density 3 ；
The nano-silica: particle size of 20nm, siO 2 99 percent of content and 0.10g/cm of bulk density 3 ；
The ursolic acid: the granularity is 200 meshes, and the content of active ingredients is 95 percent.
Step 2, preparing the master batch
Mixing chitosan and ursolic acid, dissolving in distilled water to obtain a first mixed solution, heating to 53 deg.C, and keeping the temperature for 15min; the amount of the distilled water is 6 times of the total mass of the chitosan and the ursolic acid;
then mixing the first mixed solution with nano titanium oxide and nano silicon dioxide, starting stirring, and stirring at the rotating speed of 2000rpm for 30min to obtain a second mixed solution;
then, carrying out ultrasonic treatment on the second mixed solution for 3 times at an ultrasonic power of 50Kw, wherein the ultrasonic treatment time is 2.5min each time, and the ultrasonic treatment interval is 1.5min, so as to obtain a third mixed solution after treatment;
drying the third mixed solution at 75 deg.C for 4h, and drying at 40 deg.C until the water content of solid is lower than 7%;
and introducing the dried solid into mixing equipment for melt blending to prepare melt-blown master batch, wherein the blending temperature is 210 ℃, the blending time is 8min, and the rotating speed is 50rpm.
Step 3, melt extrusion
At the feed end of the extruder, the polypropylene chips and the powder are fully mixed and then enter the screw extruder to be heated into a melt, and finally the melt is fed into a spinneret plate through a metering pump and a filter. The screw temperature adopted for melt extrusion is 235 ℃, the melt pipe temperature is 242 ℃, and the die head temperature is 260 ℃. In the melt-blowing process, the extruder also typically lowers the molecular weight of the polypropylene by shearing and thermal degradation.
Step 4, fiber drafting
After the melt-blown master batch is melted and extruded, the filtered clean melt is uniformly fed into each group of spinneret plates through a distribution system, so that the extrusion amount of each spinneret hole is consistent. The molten polymer filaments extruded from the spinneret holes are rapidly thinned and elongated under the impact of high-speed hot air flows on two sides, and are subjected to hot air drafting to form superfine fibers with the diameter of 1.0 mu m. Hot air quantity 4400m 3 H, hot air temperature 272 ℃.
Step 5, bonding into a net
Spraying superfine fiber onto the net forming curtain, adhering the fiber to the net forming curtain by sucking air from the bottom of the net, and forming net with air suction flow of 1350m 3 /h。
Step 6, electrostatic addition
The web-formed melt-blown non-woven fabric is electrostatically charged by an electrostatic field formed by an electrostatic generator, wherein the voltage of the electrostatic generator is 32V, and the current is 22A.
Step 7, slitting and winding
After hot rolling and reinforcing, the steel plate is cut into required width and wound into a coiled material.
Step 8, after finishing
a) Mixing of oil solutions
The adopted oil agent raw materials comprise glycerol, ethanol, sodium lactate, dandelion extract and deionized water, and the mass ratio is 6: 2.5:1:0.2:10; the dandelion extract contained 4.5% flavonoids. The oil raw materials are fully mixed at the temperature of 45 ℃.
b) Oiling
The cloth surface of the non-woven fabric is evenly oiled, the liquid carrying capacity of the cloth surface is 90%, and the wet cloth surface is rolled by a pair of rollers to remove redundant liquid.
c) Drying the mixture
Drying the non-woven fabric under the action of hot air at the drying temperature of 130 ℃ for 55 seconds.
d) Slitting and rolling
Cutting into appropriate width by a cutter, and winding into coils.
The melt-blown non-woven fabric prepared by the embodiment has long-acting antiviral and bacteriostatic effects, can effectively resist influenza A virus, influenza B virus, influenza C virus and COVID-19 virus within 3 years of storage time, and has good bacteriostatic effects on escherichia coli, staphylococcus aureus and candida albicans; wherein, the bacteriostasis rate to colibacillus is 99.5 percent, the bacteriostasis rate to staphylococcus aureus is 99.5 percent, and the bacteriostasis rate to candida albicans is 99.4 percent.
Melt-blown non-woven fabric prepared by the embodiment has an antistatic water pressure mean value of 72cmH 2 O。
The mask prepared from the melt-blown non-woven fabric prepared by the embodiment is detected according to NIOSH Standards (Title 42 CFR Part 84), the impedance is as low as 45Pa, and the filtering efficiency of 0.3 particle reaches 99.5%; the blood penetration resistance is tested according to the GB19083-2010 standard and reaches 160mmHg.
Except for special description, the percentages are mass percentages, and the proportions are mass ratios.
Although the embodiments of the present invention have been described in detail, the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (3)

1. A preparation method of melt-blown non-woven fabric for a biomass antivirus and bacteriostatic mask is characterized by comprising the following steps: the adopted raw materials comprise PP melt-blown material, polyolefin copolymer, chitosan, nano titanium oxide, nano silicon dioxide and ursolic acid;
the raw materials comprise PP melt-blown material, polyolefin copolymer, chitosan, nano titanium oxide, nano silicon dioxide and ursolic acid in a mass ratio of 70-75:10-13:1-2:0.2-0.4:0.1-0.15:0.5-0.9;
the PP melt-spraying material comprises the following components: MFR range 1300-1600 g/10min; the polyolefin copolymer: ethylene, propylene copolymers, ethylene: the mass ratio of propylene is 1; the chitosan: the content of active ingredients is 95 percent, and the water content is lower than 4 percent; the nano titanium oxide: particle size of 20nm, tiO 2 91-92% of the total weight and 0.4g/cm of bulk density 3 (ii) a The nano silicon dioxide: particle size of 20nm, siO 2 Content 99%, bulk density 0.10g/cm 3 (ii) a The ursolic acid: the granularity is 200 meshes, and the content of active ingredients is 95 percent;
the preparation method of the melt-blown non-woven fabric comprises the step of preparing master batch;
the preparation of the master batch comprises the following steps: mixing chitosan and ursolic acid, and dissolving in distilled water to obtain a first mixed solution; heating the first mixed solution to 50-55 ℃, and preserving the heat for 10-15min; then mixing the first mixed solution with nano titanium oxide and nano silicon dioxide to obtain a second mixed solution; then, carrying out ultrasonic treatment on the second mixed solution to obtain a third mixed solution; drying the third mixed solution, introducing the dried solid into mixing equipment, and carrying out melt blending with the PP melt-blown material and the polyolefin copolymer to obtain melt-blown master batch;
the ultrasonic treatment comprises the following steps: performing ultrasonic treatment for 3 times at 20-50Kw ultrasonic power, wherein the ultrasonic treatment time is 2-2.5min each time, and the ultrasonic treatment interval is 1-1.5min;
and (3) drying: drying at 70-75 deg.C for 3.5-4h, and drying at 40-45 deg.C until the water content of solid is lower than 7%;
the melt blending: the blending temperature is 190-210 ℃, the blending time is 3-8min, and the rotating speed is 45-50rpm.
2. The preparation method of the melt-blown nonwoven fabric for the biomass antivirus and bacteriostatic mask according to claim 1, which is characterized in that: the preparation method further comprises a melt extrusion step; the melt extrusion: the screw temperature is 230-245 ℃, the melt pipe temperature is 240-260 ℃, and the die head temperature is 260-270 ℃.
3. An organism according to claim 1The preparation method of the melt-blown non-woven fabric for the texture disinfection and bacteriostasis mask is characterized by comprising the following steps: the preparation method also comprises the steps of fiber drafting, bonding into a net and electrostatic addition; the fiber drafting: hot air volume 4400-4600m 3 H, the temperature of hot air is 270-280 ℃;
the step of bonding and forming a net: the adopted net bottom induced draft flow rate is 1300-1500m 3 /h；
The static electricity adding step: the voltage of the electrostatic generator is 30-50V, and the current is 20-30A.
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US7629000B2 (en) * 2003-05-13 2009-12-08 E.I. Du Pont De Nemours And Company Method for making antimicrobial polyester-containing articles with improved wash durability and articles made thereby
CN102121174A (en) * 2010-12-24 2011-07-13 北京美格赛斯无纺科技有限公司 Nonwovens containing antibacterial and antiviral master batches and method and device for producing same
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