CN112981703B - High-spinnability melt-blown non-woven fabric and preparation method thereof - Google Patents
High-spinnability melt-blown non-woven fabric and preparation method thereof Download PDFInfo
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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
- D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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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
- D04H1/413—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 containing granules other than absorbent substances
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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
- D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Filtering Materials (AREA)
- Nonwoven Fabrics (AREA)
Abstract
A process for preparing the high-spinnability meltblown non-woven fabric includes such steps as melt extruding out of raw material, drafting, cooling for solidifying, laying net and reinforcing. The high spinnability melt-blown non-woven fabric prepared by the invention has the advantages that: after being stored for 3 months under the condition of high temperature and high humidity, the filtration efficiency is attenuated to 1.2 to 2 percent; the antibacterial rate to colibacillus is 99.96-99.98%, the antibacterial rate to staphylococcus aureus is 98.83-99.03%, and the antibacterial rate to enterococcus faecalis is 99.35-99.61%; the longitudinal breaking strength is 68N-71N, and the transverse breaking strength is 72N-75N; the longitudinal tensile strength is 57MPa to 59MPa, and the transverse tensile strength is 62MPa to 65 MPa; the elongation at break in the longitudinal direction is 200-210% and the elongation at break in the transverse direction is 250-260%.
Description
Technical Field
The invention relates to the field of melt-blown fabric production, in particular to a high-spinnability melt-blown non-woven fabric and a preparation method thereof.
Background
Spinnability is one of important application characteristics for measuring the difficulty of spinning polypropylene into fine fibers, and refers to the characteristic that after a melt is sprayed out from a spinneret orifice, the melt fine flow forms continuous fibers with certain physical and mechanical properties. The properties of polypropylene related to spinnability are mainly divided into two main categories of physical properties and chemical properties: the physical characteristics of polypropylene related to spinnability mainly refer to melting point, softening point, glass transition temperature, shear viscosity, extensional viscosity, crystallinity, moisture content, impurity content and the like; the chemical properties of polypropylene related to spinnability mainly refer to molecular structure, molecular weight distribution, stability and the like. When the spinnability of polypropylene is poor, the polypropylene is represented as follows: the spinning melt temperature fluctuates, the melt pressure is higher, the melt drips, the high-speed drafting cannot be realized, the broken filaments are easy to occur, the degradation is easy, the monomers are more, the smoke is large, the service cycle of a filter screen and a spinneret plate is short, the shutdown fault is easy to generate, and the like.
The melt-blown fabric is classified into civil and medical grades, the melt-blown fabric of the medical grade is classified into 90 grades, 95 grades and 99 grades, different grades correspond to different masks, the melt-blown fabric reaches 99 grades, which means that an electrostatic filter screen of the melt-blown fabric filters 99 percent of particles and bacteria in air to achieve the purpose of protection, so that polypropylene which is used as a raw material for manufacturing the melt-blown fabric is particularly important, the melt-blown fabric manufactured by the melt-blown fabric reaches 95 grades at most, so that the electrostatic adsorption effect can be achieved by adding electret master batches, however, the spinnability of the polypropylene can be affected by adding the electret master batches, corona electret or water electret is used, the electret stability is poor, the charge attenuation is fast, and other functional additives are required to be added in the preparation process of the melt-blown fabric to ensure the antibacterial property, the breaking strength, the tensile strength, the breaking elongation and the like of the melt-blown fabric.
Patent CN105623074B discloses a nonwoven fabric raw material, a preparation method thereof and a preparation method of nonwoven fabric, the nonwoven fabric raw material comprises a polypropylene composition and a nucleating agent, the polypropylene composition comprises 40-70 wt% of crystalline polypropylene a and 30-60 wt% of ethylene-propylene elastic copolymer B, wherein, at 230 ℃ and 2.16kg, the ratio of the melt index of the polypropylene composition to the melt index of the crystalline polypropylene a is 0.7-1.3; the content of the nucleating agent is 200-2000ppm based on the total weight of the polypropylene composition. The patent has the following defects: the prepared non-woven fabric has poor electrostatic adsorption capacity.
The patent CN112281304A discloses an electrostatic electret melt-blown non-woven fabric and a preparation method thereof, wherein the raw materials of the electrostatic electret melt-blown non-woven fabric comprise 98.5-99 parts by weight of melt-blown master batches and 1-1.5 parts by weight of electret master batches, static electricity is injected into the cloth surface of the non-woven fabric, the preparation method of the electrostatic electret melt-blown non-woven fabric comprises a) batching, b) melting, c) spinning, d) net forming and e) electret, the melt-blown master batches with the weight ratio of 98.5-99 parts and 1-1.5 parts by weight of the electret master batches are prepared into melt-blown base cloth, and then the static electricity is injected into the cloth surface of the melt-blown base cloth. The patent has the following defects: the prepared electrostatic electret melt-blown non-woven fabric has poor spinnability.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a preparation method of a high-spinnability melt-blown non-woven fabric, which can improve the spinnability of the melt-blown non-woven fabric and the electrostatic adsorption effect, and simultaneously ensures that the melt-blown non-woven fabric has good antibacterial property, high breaking strength, high tensile strength and high breaking elongation.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a process for preparing the high-spinnability meltblown non-woven fabric includes such steps as melt extruding out of raw material, drafting, cooling for solidifying, laying net and reinforcing.
The raw materials are melted and extruded, 200 to 210 weight parts of polypropylene resin, 4 to 5 weight parts of fluorite powder, 7 to 10 weight parts of nano tourmaline powder and 10 to 12 weight parts of adipic acid are put into a closed reaction tank with the temperature of 80 to 90 ℃, the pressure in the tank is adjusted to be 2.5 to 2.8MPa, stirring at 2000-2100 rpm for 10-12 min, reducing pressure to 2.1-2.2MPa, stirring for 6-8 minutes at the rotating speed of 1200-1500 rpm, then continuously adding 12-14 parts by weight of chitosan, 6-7 parts by weight of sodium alginate and 5-6 parts by weight of microcrystalline cellulose powder into the closed reaction tank, adjusting the pressure in the tank to be 1.2-1.4MPa, stirring the mixture for 30 to 35 minutes at the rotating speed of 900 to 1100 revolutions per minute to obtain a raw material mixture. Introducing the raw material mixture into a screw extruder for melting and extruding, wherein the length-diameter ratio of the screw extruder is 10-13: 1, the temperature of the feeding section of the screw is controlled to be 230-240 ℃, the temperature of the compression section of the screw is controlled to be 210-230 ℃, the rotating speed of the screw is 30-40rpm, the temperature of a melt-blowing die head is 170-185 ℃, and the spinning speed is 1300-1500 m/min.
The polypropylene resin manufacturer is Shanghai Seikeke petrochemical industry Limited liability company with the model of Shanghai Seake S2045.
The particle size of the nano tourmaline powder is 150-180 nm.
And (2) the drafting, namely filtering the melt from the screw extruder through a filter with the pore diameter of 2 mu m, keeping the temperature of the melt at 160-170 ℃, then drafting the melt to superfine fibers through hot air flow, cooling the superfine fibers through side cooling air, and further drafting the superfine fibers to obtain primary fibers, wherein the temperature of the hot air flow is 150-160 ℃, and the temperature of the side cooling air is 60-65 ℃.
And (3) cooling and solidifying, namely further cooling and solidifying the primary fibers by using side cold air, wherein the temperature of the side cold air is 20-25 ℃.
And (3) lapping, namely lapping the cooled and solidified fibers by using a lapping machine to obtain the primary non-woven fabric.
The reinforcement is to input the primary non-woven fabric into a needle machine for reinforcement, and electrify the needle head at the same time, so that the needle head carries 0.5-0.7mA current in the reinforcement process; then needling is carried out by adopting the motion trail of the downward needling linear felting needle, and the high-spinnability melt-blown non-woven fabric is obtained after the needling is finished.
The needle density of the needle machine is 16000-17000 pieces/m, the needle plate cloth needle mode in the needle process is double-person shape, the needle frequency is 3000-3100 times/min, and the needle density is 1200-1400 pieces/cm 2.
Compared with the prior art, the invention has the beneficial effects that:
(1) the high-spinnability melt-blown non-woven fabric prepared by the invention improves the spinnability of the melt-blown non-woven fabric by adding microcrystalline cellulose;
(2) the high-spinnability melt-blown non-woven fabric prepared by the invention improves the electrostatic adsorption capacity by adding the nano tourmaline powder, and improves the charge storage performance by using a needle head with current for reinforcement in the reinforcement process, and the filtration efficiency of the high-spinnability melt-blown non-woven fabric is attenuated to 1.2-2% after the high-spinnability melt-blown non-woven fabric is stored for 3 months under the high-temperature and high-humidity condition;
(3) the antibacterial property of the high-spinnability melt-blown non-woven fabric prepared by the invention is improved by adding chitosan and sodium alginate, the antibacterial rate of the high-spinnability melt-blown non-woven fabric to escherichia coli is 99.96-99.98%, the antibacterial rate to staphylococcus aureus is 98.83-99.03%, and the antibacterial rate to enterococcus faecalis is 99.35-99.61%;
(4) the high-spinnability melt-blown non-woven fabric prepared by the invention is reinforced by using a needle head with current in the reinforcing process, so that the breaking strength is improved, the longitudinal breaking strength of the high-spinnability melt-blown non-woven fabric is 68N-71N, and the transverse breaking strength of the high-spinnability melt-blown non-woven fabric is 72N-75N;
(5) the high-spinnability melt-blown non-woven fabric prepared by the invention is reinforced by using a needle head with current in the reinforcing process, so that the tensile strength is improved, the longitudinal tensile strength of the high-spinnability melt-blown non-woven fabric is 57-59 MPa, and the transverse tensile strength of the high-spinnability melt-blown non-woven fabric is 62-65 MPa;
(6) the high-spinnability melt-blown non-woven fabric prepared by the invention is reinforced by using a needle head with current in the reinforcing process, so that the breaking elongation is improved, the longitudinal breaking elongation of the high-spinnability melt-blown non-woven fabric is 200-210%, and the transverse breaking elongation of the high-spinnability melt-blown non-woven fabric is 250-260%.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described.
Example 1
A process for preparing the high-spinnability meltblown non-woven fabric includes such steps as melt extruding out of raw material, drafting, cooling for solidifying, laying net and reinforcing.
The raw materials are melted and extruded, 200 parts by weight of polypropylene resin, 4 parts by weight of fluorite powder, 7 parts by weight of nano tourmaline powder and 10 parts by weight of adipic acid are placed in a closed reaction tank at the temperature of 80 ℃, the pressure in the tank is adjusted to be 2.5MPa, the nano tourmaline powder and the adipic acid are stirred for 10 minutes at the rotating speed of 2000 r/min, the pressure is reduced to 2.1MPa, the nano tourmaline powder and the adipic acid are stirred for 6 minutes at the rotating speed of 1200 r/min, then 12 parts by weight of chitosan, 6 parts by weight of sodium alginate and 5 parts by weight of microcrystalline cellulose powder are continuously added into the closed reaction tank, the pressure in the tank is adjusted to be 1.2MPa, and the nano tourmaline powder and the adipic acid are stirred for 30 minutes at the rotating speed of 900 r/min, so that a raw material mixture is obtained. Introducing the raw material mixture into a screw extruder for melting and extruding, wherein the length-diameter ratio of the screw extruder is 10: 1, the temperature of the feeding section of the screw is controlled to be 230 ℃, the temperature of the compression section of the screw is controlled to be 210 ℃, the rotating speed of the screw is 30rpm, the temperature of a melt-blowing die head is 170 ℃, and the spinning speed is 1300 m/min.
The polypropylene resin manufacturer is Shanghai Seikeke petrochemical industry Limited liability company with the model of Shanghai Seake S2045.
The particle size of the nano tourmaline powder is 150 nm.
And (3) the drafting, namely filtering the melt from the screw extruder through a filter with the pore diameter of 2 mu m, keeping the temperature of the melt at 160 ℃, then drafting the melt to superfine fibers through hot air flow, cooling the superfine fibers through cold air at the side, and further drafting the superfine fibers to obtain primary fibers, wherein the temperature of the hot air flow is 150 ℃, and the temperature of the cold air at the side is 60 ℃.
And (3) cooling and solidifying, and further cooling and solidifying the primary fibers by using side cold air, wherein the temperature of the side cold air is 20 ℃.
And (3) lapping, namely lapping the cooled and solidified fibers by using a lapping machine to obtain the primary non-woven fabric.
The reinforcement is to input the primary non-woven fabric into a needle machine for reinforcement, and electrify the needle head at the same time, so that the needle head has 0.5mA current in the reinforcement process; the needle density of the needle machine is 16000 pieces/m, the motion track of the lower-needling linear felting needle is adopted, the needle plate cloth needle mode is double-person shape, the needling frequency is 3000 times/min, and the needling density is 1200 needling/cm 2; and obtaining the high-spinnability melt-blown non-woven fabric after the needling is finished.
Example 2
A process for preparing the high-spinnability meltblown non-woven fabric includes such steps as melt extruding out of raw material, drafting, cooling for solidifying, laying net and reinforcing.
The raw materials are subjected to melt extrusion, 205 parts by weight of polypropylene resin, 4 parts by weight of fluorite powder, 8 parts by weight of nano tourmaline powder and 11 parts by weight of adipic acid are placed in a closed reaction tank at the temperature of 85 ℃, the pressure in the tank is adjusted to be 2.6MPa, the nano tourmaline powder and the adipic acid are stirred for 11 minutes at the rotating speed of 2050 r/min, the pressure is reduced to 2.2MPa, the nano tourmaline powder and the adipic acid are stirred for 7 minutes at the rotating speed of 1300 r/min, then 13 parts by weight of chitosan, 6 parts by weight of sodium alginate and 5 parts by weight of microcrystalline cellulose powder are continuously added into the closed reaction tank, the pressure in the tank is adjusted to be 1.3MPa, and the raw materials are stirred for 32 minutes at the rotating speed of 1000 r/min, so that a raw material mixture is obtained. Introducing the raw material mixture into a screw extruder for melting and extruding, wherein the length-diameter ratio of the screw extruder is 12: 1, the temperature of the feeding section of the screw is controlled to be 235 ℃, the temperature of the compression section of the screw is controlled to be 220 ℃, the rotating speed of the screw is 35rpm, the temperature of a melt-blowing die head is 175 ℃, and the spinning speed is 1400 m/min.
The polypropylene resin manufacturer is Shanghai Seikeke petrochemical industry Limited liability company with the model of Shanghai Seake S2045.
The particle size of the nano tourmaline powder is 160 nm.
And (3) the drafting is to filter the melt from the screw extruder through a filter with the pore diameter of 2 mu m, keep the temperature of the melt at 165 ℃, then draft the melt to superfine fibers through hot air flow, further draft the superfine fibers through cooling of cold air on the side to obtain primary fibers, wherein the temperature of the hot air flow is 155 ℃, and the temperature of the cold air on the side is 62 ℃.
The cooling solidification is carried out, and the primary fiber is further cooled and solidified by using side cold air, wherein the temperature of the side cold air is 22 ℃.
And (3) lapping, namely lapping the cooled and solidified fibers by using a lapping machine to obtain the primary non-woven fabric.
The reinforcement is to input the primary non-woven fabric into a needle machine for reinforcement, and electrify the needle head at the same time, so that the needle head has 0.6mA current in the reinforcement process; the needle density of the needle machine is 16500 pieces/m, the motion track of the lower-needling linear type felting needle is adopted, the needle plate cloth needle mode is double-character, the needling frequency is 3050 times/min, and the needling density is 1300 needling/cm 2; and obtaining the high-spinnability melt-blown non-woven fabric after the needling is finished.
Example 3
A process for preparing the high-spinnability meltblown non-woven fabric includes such steps as melt extruding out of raw material, drafting, cooling for solidifying, laying net and reinforcing.
The raw materials are melted and extruded, 210 parts by weight of polypropylene resin, 5 parts by weight of fluorite powder, 10 parts by weight of nano tourmaline powder and 12 parts by weight of adipic acid are placed in a closed reaction tank at the temperature of 90 ℃, the pressure in the tank is adjusted to be 2.8MPa, the mixture is stirred for 12 minutes at the rotating speed of 2100 revolutions per minute, the pressure is reduced to 2.2MPa, the mixture is stirred for 8 minutes at the rotating speed of 1500 revolutions per minute, then 14 parts by weight of chitosan, 7 parts by weight of sodium alginate and 6 parts by weight of microcrystalline cellulose powder are continuously added into the closed reaction tank, the pressure in the tank is adjusted to be 1.4MPa, and the mixture is stirred for 35 minutes at the rotating speed of 1100 revolutions per minute, so that a raw material mixture is obtained. Introducing the raw material mixture into a screw extruder for melting and extruding, wherein the length-diameter ratio of the screw extruder is 13: 1, the temperature of the feeding section of the screw is controlled to be 240 ℃, the temperature of the compression section of the screw is controlled to be 230 ℃, the rotating speed of the screw is 40rpm, the temperature of a melt-blowing die head is 185 ℃, and the spinning speed is 1500 m/min.
The polypropylene resin manufacturer is Shanghai Seikeke petrochemical industry Limited liability company with the model of Shanghai Seake S2045.
The particle size of the nano tourmaline powder is 180 nm.
And (3) the drafting is to filter the melt from the screw extruder through a filter with the pore diameter of 2 mu m, keep the temperature of the melt at 170 ℃, then draft the melt to superfine fibers through hot air flow, cool the superfine fibers through side cold air and further draft the superfine fibers to obtain primary fibers, wherein the temperature of the hot air flow is 160 ℃, and the temperature of the side cold air is 65 ℃.
And (3) cooling and solidifying, namely further cooling and solidifying the primary fibers by using side cold air, wherein the temperature of the side cold air is 25 ℃.
And (3) lapping, namely lapping the cooled and solidified fibers by using a lapping machine to obtain the primary non-woven fabric.
The reinforcement is to input the primary non-woven fabric into a needle machine for reinforcement, and electrify the needle head at the same time, so that the needle head has 0.7mA current in the reinforcement process; the needle density of the needle machine is 17000 pieces/m, the motion trail of the lower-needling linear felting needle is adopted, the needle plate distribution mode is double-person shape, the needling frequency is 3100 times/min, and the needling density is 1400 needling/cm 2; and obtaining the high-spinnability melt-blown non-woven fabric after the needling is finished.
Example 4
The high spinnability meltblown nonwoven fabrics described in examples 1-3 were used for performance testing, while comparative examples 1-2 were set for comparison.
Comparative example 1: the difference between the preparation method of the high spinnability melt-blown non-woven fabric described in the embodiment 1 is that: microcrystalline cellulose powder is not used in the raw material melt extrusion step.
Comparative example 2: the difference between the preparation method of the high spinnability melt-blown non-woven fabric described in the embodiment 1 is that: the needle is not energized during the consolidation step.
Storing for 3 months under high temperature and high humidity condition with temperature of 45 + -2 deg.C and humidity of 90 + -2%, and testing the attenuation condition of filtration efficiency.
All percentages used in the present invention are mass percentages unless otherwise indicated.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A preparation method of high spinnability melt-blown non-woven fabric is characterized by comprising the steps of raw material melt extrusion, drafting, cooling solidification, lapping and reinforcement;
the raw materials are melted and extruded, 200 to 210 weight parts of polypropylene resin, 4 to 5 weight parts of fluorite powder, 7 to 10 weight parts of nano tourmaline powder and 10 to 12 weight parts of adipic acid are put into a closed reaction tank with the temperature of 80 to 90 ℃, the pressure in the tank is adjusted to be 2.5 to 2.8MPa, stirring at 2000-2100 rpm for 10-12 min, reducing pressure to 2.1-2.2MPa, stirring for 6-8 minutes at the rotating speed of 1200-1500 rpm, then continuously adding 12-14 parts by weight of chitosan, 6-7 parts by weight of sodium alginate and 5-6 parts by weight of microcrystalline cellulose powder into the closed reaction tank, adjusting the pressure in the tank to be 1.2-1.4MPa, stirring for 30-35 minutes at the rotating speed of 900-1100 r/min to obtain a raw material mixture; introducing the raw material mixture into a screw extruder for melt extrusion;
the length-diameter ratio of a screw extruder in the raw material melt extrusion is 10-13: 1, controlling the temperature of a feeding section of a screw to be 230-240 ℃, controlling the temperature of a compression section of the screw to be 210-230 ℃, controlling the rotating speed of the screw to be 30-40rpm, controlling the temperature of a melt-blowing die head to be 170-185 ℃, and controlling the spinning speed to be 1300-1500 m/min;
the particle size of the nano tourmaline powder is 150-180 nm;
the drafting step, filtering the melt from the screw extruder through a filter with the pore diameter of 2 mu m, keeping the temperature of the melt at 160-170 ℃, then drafting the melt to superfine fibers through hot air flow, cooling the superfine fibers through side cooling air, and further drafting the superfine fibers to obtain primary fibers, wherein the temperature of the hot air flow is 150-160 ℃, and the temperature of the side cooling air is 60-65 ℃;
the cooling solidification is carried out, and the primary fiber is further cooled and solidified by using side cold air, wherein the temperature of the side cold air is 20-25 ℃;
lapping, namely lapping the cooled and solidified fibers by using a lapping machine to obtain primary non-woven fabric;
the reinforcement is to input the primary non-woven fabric into a needle machine for reinforcement, and electrify the needle head at the same time, so that the needle head carries 0.5-0.7mA current in the reinforcement process; then needling is carried out by adopting a motion track of a downward needling linear type felting needle, and a high-spinnability melt-blown non-woven fabric is obtained after the needling is finished;
the needle density of the needle machine is 16000-17000 pieces/m, the needle plate cloth needle mode in the needle process is double-person shape, the needle frequency is 3000-3100 times/min, and the needle density is 1200-1400 pieces/cm2。
2. The method of claim 1, wherein the polypropylene resin is produced by Shanghai Seiki petrochemical Co., Ltd. type Shanghai Seiki S2045.
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