CN113198255A - Ultralow-resistance melt-blown filter material and production process thereof - Google Patents
Ultralow-resistance melt-blown filter material and production process thereof Download PDFInfo
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- CN113198255A CN113198255A CN202110502293.3A CN202110502293A CN113198255A CN 113198255 A CN113198255 A CN 113198255A CN 202110502293 A CN202110502293 A CN 202110502293A CN 113198255 A CN113198255 A CN 113198255A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
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- 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
- D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
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- 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
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- 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
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- 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
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- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Filtering Materials (AREA)
Abstract
The invention relates to the technical field of filter materials, in particular to an ultra-low resistance melt-blown filter material and a production process thereof; comprises the following components in percentage by weight: 85-90% of polypropylene resin and the balance of polypropylene master batch; the polypropylene master batch is prepared from the following raw materials in parts by weight: 85-100 parts of polypropylene resin, 6-12 parts of ethylene-methacrylate copolymer, 3.0-3.6 parts of diatomite, 1.8-2.5 parts of nano silver, 2.0-2.8 parts of nano calcium carbonate, 1.2-1.6 parts of nano titanium dioxide, 2.5-3.2 parts of composite anti-aging agent, 0.8-1.2 parts of antioxidant, 1.5-2.2 parts of nucleating agent, 1.0-1.3 parts of slipping agent, 0.6-1.0 part of lubricant and 1.0-1.5 parts of ultraviolet absorbent; the melt-blown filter material produced by the invention has certain antistatic performance, antibacterial performance and ageing resistance; in addition, the fabric has good air permeability and gram weight indexes; the mechanical property is also excellent; effectively ensuring the quality of the produced melt-blown filter material.
Description
Technical Field
The invention relates to the technical field of filter materials, in particular to an ultra-low resistance melt-blown filter material and a production process thereof.
Background
Haze, which is a combination word of fog and haze. Haze is common in cities. In China, the fog is merged into the haze to be used as a disaster weather phenomenon for early warning and forecasting, and the phenomenon is called as haze weather. Haze is the result of specific climatic conditions interacting with human activity. Economic and social activities of high-density population inevitably discharge a large amount of fine particulate matters (PM2.5), once the discharge exceeds the atmospheric circulation capacity and the bearing capacity, the concentration of the fine particulate matters is continuously accumulated, and at the moment, if the influence of calm weather and the like is caused, the haze in a large range is extremely easy to appear.
Compared with fog, haze is more harmful to the health of people. As the diameter of the fine powder floating particles in haze is generally below 0.01 micron, the fine powder floating particles can directly enter the bronchus and even the lung through a respiratory system. Therefore, the greatest influence of haze is the respiratory system of a human, and the caused diseases are mainly concentrated on respiratory diseases, cerebrovascular diseases, nasal inflammation and other disease types. Meanwhile, in the dust-haze weather, the air pressure is reduced, the inhalable particles in the air are suddenly increased, the air flowability is poor, the speed of spreading harmful bacteria and viruses to the surroundings is slowed, the virus concentration in the air is increased, and the risk of disease transmission is high.
The mask has the function of blocking harmful gas, smell, droplets, viruses and other substances, so that the mask becomes a necessary daily product for people to go out. The filter material in the mask sold in the market at present mostly adopts polypropylene as the raw material. The polypropylene filtering material prepared by the prior art can prevent harmful gas from entering the respiratory tract of a human body to a certain extent. But has a plurality of defects which need to be improved. For example, the composition has the defects of large respiratory resistance, unsatisfactory gram weight index, relatively poor ageing resistance and antibacterial performance and the like; this seriously affects its quality.
Based on the above, the invention provides an ultra-low resistance melt-blown filter material and a production process thereof, so as to solve the problems.
Disclosure of Invention
The invention aims to provide an ultra-low resistance melt-blown filter material and a production process thereof, and the melt-blown filter material produced by the invention not only has certain antistatic performance, antibacterial performance and anti-aging performance; in addition, the fabric has good air permeability and gram weight indexes; the mechanical property is also excellent; effectively ensuring the quality of the produced melt-blown filter material.
In order to achieve the purpose, the invention provides the following technical scheme:
an ultra-low resistance melt-blown filter material comprising, in weight percent: 85-90% of polypropylene resin and the balance of polypropylene master batch;
the polypropylene master batch is prepared from the following raw materials in parts by weight: 85-100 parts of polypropylene resin, 6-12 parts of ethylene-methacrylate copolymer, 3.0-3.6 parts of diatomite, 1.8-2.5 parts of nano silver, 2.0-2.8 parts of nano calcium carbonate, 1.2-1.6 parts of nano titanium dioxide, 2.5-3.2 parts of composite anti-aging agent, 0.8-1.2 parts of antioxidant, 1.5-2.2 parts of nucleating agent, 1.0-1.3 parts of slipping agent, 0.6-1.0 part of lubricant and 1.0-1.5 parts of ultraviolet absorbent.
Further, the preparation method of the composite anti-aging agent comprises the following steps:
weighing a proper amount of nano talcum powder, putting the nano talcum powder into a proper amount of 60-75% ethanol solution according to a solid-to-liquid ratio of 0.08-0.15 g/mL, and then respectively adding 2.0-3.8% by mass of cocamidopropyl hydroxysultaine and a proper amount of antistatic agent into the ethanol solution; after the ultrasonic mixing is carried out uniformly, adding a proper amount of silane coupling agent into the obtained mixed phase, and carrying out ultrasonic dispersion on the mixed phase for 5-10 min at the frequency of 30-35 kHz; after the dispersion is finished, adjusting the temperature of the obtained mixed component to 60-75 ℃, and carrying out heat preservation reaction for 5-8 h at the temperature; and after the reaction is finished, filtering the mixed components, washing the obtained solid micro powder with ethanol for 2-3 times, and naturally drying to obtain the finished product of the composite anti-aging agent.
Furthermore, the antistatic agent is MI00-10T water-soluble antistatic agent, and the dosage of the antistatic agent is 10-20% of that of the ethanol solution.
Furthermore, the silane coupling agent is any one of gamma-aminopropyltriethoxysilane, gamma- (2, 3-glycidoxy) propyltrimethoxysilane and gamma- (methacryloyloxy) propyltrimethoxysilane.
Furthermore, the antioxidant is selected from any one of antioxidant 1010 and antioxidant 168.
Furthermore, the nucleating agent is any one of an organic phosphate nucleating agent and an aromatic carboxylate nucleating agent.
Furthermore, the slipping agent is any one of an amide slipping agent and a silicone slipping agent.
Furthermore, the lubricant is any one of ethylene double fatty acid amide, pentaerythritol palmitate and coconut diethanolamide.
Furthermore, the ultraviolet absorbent is any one of 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octoxybenzophenone.
A production process of an ultralow-resistance melt-blown filter material comprises the following steps:
s1, weighing the raw materials according to the formula amount; grinding the solid material to keep the particle size of 400-500 meshes; then, storing the raw materials respectively for later use;
s2, transferring the polypropylene resin, the ethylene-methacrylate copolymer, the lubricant and the slipping agent into a high-speed mixer for premixing for 10-20 min; after premixing, adding the rest raw materials into a high-speed mixer; continuously mixing for 30-40 min to obtain mixed slurry;
s3, transferring the mixed slurry obtained in the step S2 into a double-screw extruder, setting the temperature of each interval of the extruder, starting the extruder to extrude strands, and then cooling, granulating and drying to obtain polypropylene master batches; then the obtained polypropylene master batch and polypropylene resin are mixed evenly and then transferred to melt-blown spinning equipment for melt-blown spinning, the melt is delivered to a spinning assembly through a screw and then is sprayed out through a spinneret plate, and the melt is drawn by high-temperature high-speed airflow to prepare melt-blown superfine fiber;
s4, the melt-blown superfine fiber prepared in the step S3 is sequentially subjected to winding, electrostatic electret, slitting and winding treatment to obtain the finished product of the ultra-low resistance melt-blown filter material.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, nano talcum powder, antistatic agent, silane coupling agent and the like are used as raw materials for preparing the composite anti-aging agent; in the preparation process, under the coordination of cocamidopropyl hydroxysulfobetaine and ultrasonic dispersion, the antistatic agent dissolved in an ethanol solution can be uniformly dispersed in a mixed phase and effectively attached to the surface of the nano talcum powder, and then the silane coupling agent and a silicon-oxygen bond in the nano talcum powder are subjected to chemical reaction and bonded, so that the antistatic agent is limited in an interlayer formed by the nano talcum powder and the silane coupling agent.
The prepared composite anti-aging agent, the nano titanium dioxide and the diatomite are used as raw materials of the polypropylene master batch, and the diatomite has certain humidity regulation performance; the prepared melt-blown filter material has good antistatic performance;
and the composite anti-aging agent is cooperated with the diatomite, the nano titanium dioxide and the nano silver, so that the prepared melt-blown filter material has good antibacterial performance and anti-aging performance, and the service life of the melt-blown filter material is effectively prolonged.
2, the polypropylene resin is used as a raw material, and the melt-blown filter material prepared by the melt-blown spinning process has good air permeability and gram weight indexes; but also has good mechanical property. Effectively ensuring the quality of the produced melt-blown filter material.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An ultra-low resistance melt-blown filter material comprising, in weight percent: 85% of polypropylene resin and the balance of polypropylene master batch;
wherein the polypropylene master batch is prepared from the following raw materials in parts by weight: 85 parts of polypropylene resin, 6 parts of ethylene-methacrylate copolymer, 3.0 parts of diatomite, 1.8 parts of nano silver, 2.0 parts of nano calcium carbonate, 1.2 parts of nano titanium dioxide, 2.5 parts of composite anti-aging agent, 0.8 part of antioxidant, 1.5 parts of nucleating agent, 1.0 part of slipping agent, 0.6 part of lubricant and 1.0 part of ultraviolet absorbent.
The preparation method of the composite anti-aging agent comprises the following steps:
weighing a proper amount of nano talcum powder, putting the nano talcum powder into a proper amount of 60% ethanol solution according to a solid-to-liquid ratio of 0.08g/mL, and then respectively adding 2.0% by mass of cocamidopropyl hydroxysultaine and a proper amount of antistatic agent into the ethanol solution; after the ultrasonic mixing is carried out uniformly, a proper amount of silane coupling agent is added into the obtained mixed phase, and the mixed phase is subjected to ultrasonic dispersion for 5min at the frequency of 30 kHz; after the dispersion is finished, adjusting the temperature of the obtained mixed component to 60 ℃, and carrying out heat preservation reaction for 5 hours at the temperature; and after the reaction is finished, filtering the mixed components, washing the obtained solid micro powder for 2 times by using ethanol, and naturally drying to obtain the finished product of the composite anti-aging agent.
The antistatic agent is MI00-10T water soluble antistatic agent in 10% of ethanol solution.
The silane coupling agent is gamma-aminopropyl triethoxy silane.
The antioxidant is antioxidant 1010.
The nucleating agent is organic phosphate nucleating agent.
The slipping agent is amide slipping agent.
The lubricant is ethylene bis fatty acid amide.
The ultraviolet absorbent is 2-hydroxy-4-methoxybenzophenone.
A production process of an ultralow-resistance melt-blown filter material comprises the following steps:
s1, weighing the raw materials according to the formula amount; grinding the solid materials in the mixture to keep the particle size of the solid materials at 400 meshes; then, storing the raw materials respectively for later use;
s2, transferring the polypropylene resin, the ethylene-methacrylate copolymer, the lubricant and the slipping agent into a high-speed mixer for premixing for 10 min; after premixing, adding the rest raw materials into a high-speed mixer; continuously mixing for 30min to obtain mixed slurry;
s3, transferring the mixed slurry obtained in the step S2 into a double-screw extruder, setting the temperature of each interval of the extruder, starting the extruder to extrude strands, and then cooling, granulating and drying to obtain polypropylene master batches; then the obtained polypropylene master batch and polypropylene resin are mixed evenly and then transferred to melt-blown spinning equipment for melt-blown spinning, the melt is delivered to a spinning assembly through a screw and then is sprayed out through a spinneret plate, and the melt is drawn by high-temperature high-speed airflow to prepare melt-blown superfine fiber;
s4, the melt-blown superfine fiber prepared in the step S3 is sequentially subjected to winding, electrostatic electret, slitting and winding treatment to obtain the finished product of the ultra-low resistance melt-blown filter material.
Example 2
An ultra-low resistance melt-blown filter material comprising, in weight percent: 88% of polypropylene resin and the balance of polypropylene master batch;
wherein the polypropylene master batch is prepared from the following raw materials in parts by weight: 90 parts of polypropylene resin, 9 parts of ethylene-methacrylate copolymer, 3.3 parts of diatomite, 2.2 parts of nano silver, 2.5 parts of nano calcium carbonate, 1.4 parts of nano titanium dioxide, 3.0 parts of composite anti-aging agent, 1.0 part of antioxidant, 2.0 parts of nucleating agent, 1.2 parts of slipping agent, 0.8 part of lubricant and 1.2 parts of ultraviolet absorbent.
The preparation method of the composite anti-aging agent comprises the following steps:
weighing a proper amount of nano talcum powder, putting the nano talcum powder into a proper amount of 70% ethanol solution according to a solid-to-liquid ratio of 0.12g/mL, and then respectively adding 3.0% by mass of cocamidopropyl hydroxysultaine and a proper amount of antistatic agent into the ethanol solution; after the ultrasonic mixing is carried out uniformly, a proper amount of silane coupling agent is added into the obtained mixed phase, and the mixed phase is subjected to ultrasonic dispersion for 8min at the frequency of 32 kHz; after the dispersion is finished, adjusting the temperature of the obtained mixed component to 70 ℃, and carrying out heat preservation reaction for 6 hours at the temperature; and after the reaction is finished, filtering the mixed components, washing the obtained solid micro powder for 2 times by using ethanol, and naturally drying to obtain the finished product of the composite anti-aging agent.
The antistatic agent is MI00-10T water soluble antistatic agent in 15% of ethanol solution.
The silane coupling agent is gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane.
Antioxidant 168 is selected as antioxidant.
The nucleating agent is selected from aromatic carboxylate nucleating agents.
The slipping agent is silicone slipping agent.
The lubricant is pentaerythritol palmitate.
The ultraviolet absorbent is 2-hydroxy-4-n-octoxy benzophenone.
A production process of an ultralow-resistance melt-blown filter material comprises the following steps:
s1, weighing the raw materials according to the formula amount; grinding the solid materials in the mixture to keep the particle size of the solid materials at 450 meshes; then, storing the raw materials respectively for later use;
s2, transferring the polypropylene resin, the ethylene-methacrylate copolymer, the lubricant and the slipping agent into a high-speed mixer for premixing for 15 min; after premixing, adding the rest raw materials into a high-speed mixer; continuously mixing for 35min to obtain mixed slurry;
s3, transferring the mixed slurry obtained in the step S2 into a double-screw extruder, setting the temperature of each interval of the extruder, starting the extruder to extrude strands, and then cooling, granulating and drying to obtain polypropylene master batches; then the obtained polypropylene master batch and polypropylene resin are mixed evenly and then transferred to melt-blown spinning equipment for melt-blown spinning, the melt is delivered to a spinning assembly through a screw and then is sprayed out through a spinneret plate, and the melt is drawn by high-temperature high-speed airflow to prepare melt-blown superfine fiber;
s4, the melt-blown superfine fiber prepared in the step S3 is sequentially subjected to winding, electrostatic electret, slitting and winding treatment to obtain the finished product of the ultra-low resistance melt-blown filter material.
Example 3
An ultra-low resistance melt-blown filter material comprising, in weight percent: 90% of polypropylene resin and the balance of polypropylene master batch;
wherein the polypropylene master batch is prepared from the following raw materials in parts by weight: 100 parts of polypropylene resin, 12 parts of ethylene-methacrylate copolymer, 3.6 parts of diatomite, 2.5 parts of nano silver, 2.8 parts of nano calcium carbonate, 1.6 parts of nano titanium dioxide, 3.2 parts of composite anti-aging agent, 1.2 parts of antioxidant, 2.2 parts of nucleating agent, 1.3 parts of slipping agent, 1.0 part of lubricant and 1.5 parts of ultraviolet absorbent.
The preparation method of the composite anti-aging agent comprises the following steps:
weighing a proper amount of nano talcum powder, putting the nano talcum powder into a proper amount of 75% ethanol solution according to a solid-to-liquid ratio of 0.15g/mL, and then respectively adding 3.8% by mass of cocamidopropyl hydroxysultaine and a proper amount of antistatic agent into the ethanol solution; after the ultrasonic mixing is carried out uniformly, a proper amount of silane coupling agent is added into the obtained mixed phase, and the mixed phase is subjected to ultrasonic dispersion for 10min at the frequency of 35 kHz; after the dispersion is finished, adjusting the temperature of the obtained mixed component to 75 ℃, and carrying out heat preservation reaction for 8 hours at the temperature; and after the reaction is finished, filtering the mixed components, washing the obtained solid micro powder for 3 times by using ethanol, and naturally drying to obtain the finished product of the composite anti-aging agent.
The antistatic agent is MI00-10T water soluble antistatic agent in 20% of ethanol solution.
The silane coupling agent is gamma- (methacryloyloxy) propyl trimethoxy silane.
The antioxidant is antioxidant 1010.
The nucleating agent is organic phosphate nucleating agent.
The slipping agent is amide slipping agent.
The lubricant is coconut diethanolamide.
The ultraviolet absorbent is 2-hydroxy-4-methoxybenzophenone.
A production process of an ultralow-resistance melt-blown filter material comprises the following steps:
s1, weighing the raw materials according to the formula amount; grinding the solid materials in the mixture to keep the particle size of the solid materials at 500 meshes; then, storing the raw materials respectively for later use;
s2, transferring the polypropylene resin, the ethylene-methacrylate copolymer, the lubricant and the slipping agent into a high-speed mixer for premixing for 20 min; after premixing, adding the rest raw materials into a high-speed mixer; continuously mixing for 40min to obtain mixed slurry;
s3, transferring the mixed slurry obtained in the step S2 into a double-screw extruder, setting the temperature of each interval of the extruder, starting the extruder to extrude strands, and then cooling, granulating and drying to obtain polypropylene master batches; then the obtained polypropylene master batch and polypropylene resin are mixed evenly and then transferred to melt-blown spinning equipment for melt-blown spinning, the melt is delivered to a spinning assembly through a screw and then is sprayed out through a spinneret plate, and the melt is drawn by high-temperature high-speed airflow to prepare melt-blown superfine fiber;
s4, the melt-blown superfine fiber prepared in the step S3 is sequentially subjected to winding, electrostatic electret, slitting and winding treatment to obtain the finished product of the ultra-low resistance melt-blown filter material.
Comparative example: the melt-blown filter material and the production process thereof provided by the embodiment are substantially the same as those of the embodiment 1, and the main differences are as follows: the raw materials do not contain compound anti-aging agents;
performance testing
The melt-blown filter materials prepared by the embodiments 1 to 3 of the present invention are referred to as embodiments 1 to 3; then, the performance of the melt-blown filter materials provided in examples 1 to 3 and the comparative example was tested, and each set of test data obtained was recorded in the following table:
the relevant data in the table show that the antibacterial and anti-aging fabric has certain antibacterial performance and anti-aging performance; in addition, the fabric has good air permeability and gram weight indexes; the mechanical property is also excellent; effectively ensuring the quality of the produced melt-blown filter material. Therefore, the melt-blown filter material product produced by the invention has wider market prospect and is more suitable for popularization.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. An ultra-low resistance melt-blown filter material, characterized in that: comprises the following components in percentage by weight: 85-90% of polypropylene resin and the balance of polypropylene master batch;
the polypropylene master batch is prepared from the following raw materials in parts by weight: 85-100 parts of polypropylene resin, 6-12 parts of ethylene-methacrylate copolymer, 3.0-3.6 parts of diatomite, 1.8-2.5 parts of nano silver, 2.0-2.8 parts of nano calcium carbonate, 1.2-1.6 parts of nano titanium dioxide, 2.5-3.2 parts of composite anti-aging agent, 0.8-1.2 parts of antioxidant, 1.5-2.2 parts of nucleating agent, 1.0-1.3 parts of slipping agent, 0.6-1.0 part of lubricant and 1.0-1.5 parts of ultraviolet absorbent.
2. The ultra-low resistance melt-blown filter material of claim 1, wherein the preparation method of the composite anti-aging agent comprises the following steps:
weighing a proper amount of nano talcum powder, putting the nano talcum powder into a proper amount of 60-75% ethanol solution according to a solid-to-liquid ratio of 0.08-0.15 g/mL, and then respectively adding 2.0-3.8% by mass of cocamidopropyl hydroxysultaine and a proper amount of antistatic agent into the ethanol solution; after the ultrasonic mixing is carried out uniformly, adding a proper amount of silane coupling agent into the obtained mixed phase, and carrying out ultrasonic dispersion on the mixed phase for 5-10 min at the frequency of 30-35 kHz; after the dispersion is finished, adjusting the temperature of the obtained mixed component to 60-75 ℃, and carrying out heat preservation reaction for 5-8 h at the temperature; and after the reaction is finished, filtering the mixed components, washing the obtained solid micro powder with ethanol for 2-3 times, and naturally drying to obtain the finished product of the composite anti-aging agent.
3. The ultra-low resistance melt-blown filter material of claim 2, wherein: the antistatic agent is MI00-10T water-soluble antistatic agent, and the dosage of the antistatic agent is 10-20% of that of the ethanol solution.
4. The ultra-low resistance melt-blown filter material of claim 2, wherein: the silane coupling agent is any one of gamma-aminopropyltriethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane and gamma- (methacryloyloxy) propyltrimethoxysilane.
5. An ultra-low resistance melt-blown filter material as claimed in claim 1, wherein: the antioxidant is selected from one of antioxidant 1010 and antioxidant 168.
6. An ultra-low resistance melt-blown filter material as claimed in claim 1, wherein: the nucleating agent is any one of an organic phosphate nucleating agent and an aromatic carboxylate nucleating agent.
7. An ultra-low resistance melt-blown filter material as claimed in claim 1, wherein: the slipping agent is any one of an amide slipping agent and a silicone slipping agent.
8. An ultra-low resistance melt-blown filter material as claimed in claim 1, wherein: the lubricant is any one of ethylene di-fatty acid amide, pentaerythritol palmitate and coconut diethanolamide.
9. An ultra-low resistance melt-blown filter material as claimed in claim 1, wherein: the ultraviolet absorbent is any one of 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octoxybenzophenone.
10. The production process of the ultra-low resistance melt-blown filter material according to any one of claims 1 to 9, comprising the following steps:
s1, weighing the raw materials according to the formula amount; grinding the solid material to keep the particle size of 400-500 meshes; then, storing the raw materials respectively for later use;
s2, transferring the polypropylene resin, the ethylene-methacrylate copolymer, the lubricant and the slipping agent into a high-speed mixer for premixing for 10-20 min; after premixing, adding the rest raw materials into a high-speed mixer; continuously mixing for 30-40 min to obtain mixed slurry;
s3, transferring the mixed slurry obtained in the step S2 into a double-screw extruder, setting the temperature of each interval of the extruder, starting the extruder to extrude strands, and then cooling, granulating and drying to obtain polypropylene master batches; then the obtained polypropylene master batch and polypropylene resin are mixed evenly and then transferred to melt-blown spinning equipment for melt-blown spinning, the melt is delivered to a spinning assembly through a screw and then is sprayed out through a spinneret plate, and the melt is drawn by high-temperature high-speed airflow to prepare melt-blown superfine fiber;
s4, the melt-blown superfine fiber prepared in the step S3 is sequentially subjected to winding, electrostatic electret, slitting and winding treatment to obtain the finished product of the ultra-low resistance melt-blown filter material.
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