CN112870848A - Multifunctional melt-blown filter element and preparation process thereof - Google Patents

Multifunctional melt-blown filter element and preparation process thereof Download PDF

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Publication number
CN112870848A
CN112870848A CN202110037396.7A CN202110037396A CN112870848A CN 112870848 A CN112870848 A CN 112870848A CN 202110037396 A CN202110037396 A CN 202110037396A CN 112870848 A CN112870848 A CN 112870848A
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melt
parts
multifunctional
blown
resin
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沈卫国
王雄毅
万洪山
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Scd New Material Technology Shanghai Co ltd
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Scd New Material Technology Shanghai Co ltd
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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
    • 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
    • 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
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2072—Other inorganic materials, e.g. ceramics the material being particulate or granular
    • 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
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0032—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions using electrostatic forces to remove particles, e.g. electret filters
    • 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
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0435—Electret
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing

Abstract

The invention discloses a multifunctional melt-blown filter element which comprises 90-95 parts by weight of PP resin, 1-5 parts by weight of electret master batch, 1-5 parts by weight of antibacterial agent, 1-5 parts by weight of compatilizer and 1-3 parts by weight of dispersing agent. Wherein the electret master batch comprises 70-80 parts by weight of homopolymerized polypropylene resin; 1-3 parts of tourmaline powder; 1-3 parts of nano silicon dioxide; 5-10 parts of polypropylene grafted maleic anhydride; 5-10 parts of dibenzylidene sorbitol; 5-10 parts of erucamide. The prepared multifunctional melt-blown filter element has excellent filtering efficiency and antibacterial and mildew-proof properties.

Description

Multifunctional melt-blown filter element and preparation process thereof
Technical Field
The invention belongs to the technical field of melt-blown filter elements, and particularly relates to a multifunctional melt-blown filter element and a preparation process thereof.
Background
Compared with the nonwoven fabric carded into a net by the traditional weaving method, the nonwoven fabric has larger specific surface, higher porosity and finer pore size, and has excellent filterability superior to that of a common filter material. At present, melt-blown non-woven fabrics can be designed into filter materials in various forms of filter cloth, cylindrical filter elements, filter bags and the like, and are used for the filtration industry.
However, the current filter materials in various forms only have the function of filtration, which often cannot meet the use requirements, especially the filter element of a water purification system. Due to the materials of the filter medium and the filter material, the filter elements are easy to be polluted and grow bacteria and algae. In addition, the conventional filter material has a very limited filtering effect on submicron particles, and if the electrostatic adsorption between the filter material and the particles is enhanced during the filtering process, the charged particles are captured or neutral particles are induced to generate polarity and then captured, so that the respiratory resistance is not increased while the filtering efficiency is enhanced. Therefore, the electret melt-blown filter element has very wide application and market prospect.
Disclosure of Invention
In order to solve the problems, the invention provides a multifunctional melt-blown filter element which comprises 90-95 parts by weight of PP resin, 1-5 parts by weight of electret master batch, 1-5 parts by weight of antibacterial agent, 1-5 parts by weight of compatilizer and 1-3 parts by weight of dispersing agent.
As a preferable technical scheme, the PP resin is metallocene PP resin, and the melt index is 1700-1900 g/10 min.
As a preferred technical scheme, the electret master batch comprises 70-80 parts by weight of homopolymerized polypropylene resin; 1-3 parts of tourmaline powder; 1-3 parts of nano silicon dioxide; 5-10 parts of polypropylene grafted maleic anhydride; 5-10 parts of dibenzylidene sorbitol; 5-10 parts of erucamide.
As a preferable technical scheme, the specific surface area of the nano-silica is more than 180m2/g。
As a preferable technical scheme, the antibacterial agent comprises at least one of nano titanium dioxide, nano silver and chitin.
As a preferable technical scheme, the nano titanium dioxide is anatase nano titanium dioxide, and the average particle size is 1-10 nm.
As a preferable technical solution, the compatibilizer is at least one of polypropylene grafted maleic anhydride, maleic anhydride grafted polyethylene, maleic anhydride grafted POE, glycidyl methacrylate grafted polypropylene, and glycidyl methacrylate grafted POE.
As a preferable technical scheme, the melt index of the polypropylene grafted maleic anhydride is 70-120 g/10 min.
As a preferable technical scheme, the dispersing agent is one or more of stearic acid, polyethylene wax or liquid paraffin.
The second aspect of the invention provides a preparation process of a multifunctional melt-blown filter element, which comprises the following steps:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, and then carrying out melt blending extrusion and granulation by a double-screw extruder to obtain the electret master batches;
s2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 1-5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring, adding into a granulator after uniformly stirring, and extruding and granulating to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, and extruding and melting the melt-blown material by a conveying section; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at the temperature of 200-315 ℃, spinning the high-temperature melt into fiber yarns through a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Has the advantages that:
1. the invention adopts specific proportion, and the components are matched to ensure the dispersion uniformity of the electret master batch in the filter element, and simultaneously improve the crystallinity of polypropylene so as to improve the storage performance of space charge; the filtering efficiency is improved, and the filtering resistance is reduced.
2. The addition of the electret material also improves the uniformity and the antibacterial stability of the antibacterial agent, and the addition of the nano antibacterial agent also improves the charge storage stability of the filter element, improves the electrostatic adsorption effect of the filter element and prolongs the service life.
3. The nucleation of the homopolymerized polypropylene is improved by adding the dibenzylidene sorbitol, the self-adhesion degree of the polypropylene fiber in the melt-blown process is improved, so that the compactness of the fiber web is reduced, the friction force between air and the polypropylene fiber is reduced by adding the erucamide, the resistance of the melt-blown non-woven fabric is obviously reduced by the dibenzylidene sorbitol and the erucamide, and the filter element has excellent filtering performance and low resistance.
4. The specific surface area of the nano silicon dioxide is more than 180m2The/g is favorable for being combined with tourmaline powder and improving the dispersibility of the tourmaline powder, so that the filter element is favorable for capturing charged particles or inducing neutral particles to generate polarity and then capturing the charged particles or the neutral particles, and the respiratory resistance is not increased while the filtration efficiency is enhanced.
5. The mixing of the nano silver and the nano titanium dioxide can not only widen the range of the excitation wavelength of the nano titanium dioxide, but also inhibit the combination of electron-hole pairs, so that the nano titanium dioxide and the nano silver have more stable antibacterial performance, and simultaneously, the nano silver and tourmaline powder in the electret master batch and the nano silicon dioxide act, so that the electrostatic adsorption effect and the charge storage stability of the filter element are further improved, and the service life of the filter element is prolonged.
Detailed Description
The invention will be further understood by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. To the extent that a definition of a particular term disclosed in the prior art is inconsistent with any definition provided in the present disclosure, the definition of the term provided in the present disclosure controls.
As used herein, a feature that does not define a singular or plural form is also intended to include a plural form of the feature unless the context clearly indicates otherwise. It will be further understood that the term "prepared from …," as used herein, is synonymous with "comprising," including, "comprising," "having," "including," and/or "containing," when used in this specification means that the recited composition, step, method, article, or device is present, but does not preclude the presence or addition of one or more other compositions, steps, methods, articles, or devices. Furthermore, the use of "preferred," "preferably," "more preferred," etc., when describing embodiments of the present invention, is meant to refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. In addition, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
In order to solve the problems, the invention provides a multifunctional melt-blown filter element in a first aspect, which comprises 90-95 parts by weight of PP resin, 1-5 parts by weight of electret master batch, 1-5 parts by weight of antibacterial agent, 1-5 parts by weight of compatilizer and 1-3 parts by weight of dispersing agent.
In some preferred embodiments, the PP resin is a metallocene PP resin and has a melt index of 1700 to 1900g/10 min.
In some preferred embodiments, the electret masterbatch is prepared from 70-80 parts by weight of a homo-polypropylene resin; 1-3 parts of tourmaline powder; 1-3 parts of nano silicon dioxide; 5-10 parts of polypropylene grafted maleic anhydride; 5-10 parts of dibenzylidene sorbitol; 5-10 parts of erucamide.
Polypropylene is one of organic electret materials, the distribution of space charge is mainly concentrated on two ends of crystal grains and the interface of a crystallization area and an amorphous area, but due to the characteristics of a melt-blown process, the crystallinity of common polypropylene melt-blown fibers is not high, the crystal grains are large, and the storage of the space charge is influenced. In order to solve the problem, dibenzylidene sorbitol is added to improve nucleation of homopolymerized polypropylene and improve self-adhesion degree of polypropylene fibers in a melt-blowing process, so that the compactness degree of a fiber web is reduced, friction force between air and the polypropylene fibers is reduced due to the addition of erucamide, resistance of melt-blown non-woven fabric can be remarkably reduced due to dibenzylidene sorbitol and erucamide, and a filter element has excellent filtering performance and low resistance.
In some preferred embodiments, the nanosilica has a specific surface area greater than 180m2The/g is favorable for being combined with tourmaline powder and improving the dispersibility of the tourmaline powder, so that the filter element is favorable for capturing charged particles or inducing neutral particles to generate polarity and then capturing the charged particles or the neutral particles, and the respiratory resistance is not increased while the filtration efficiency is enhanced.
In some preferred embodiments, the antimicrobial agent comprises at least one of nano titanium dioxide, nano silver, and chitin.
In some preferred embodiments, the antibacterial agent is a mixture of nano titanium dioxide and nano silver, and the weight ratio is (3-5): 1. the nano silver has strong antibacterial capacity, the mixing of the nano silver and the nano titanium dioxide can not only widen the excitation wavelength range of the nano titanium dioxide, but also inhibit the compounding of electron-hole pairs, so that the nano titanium dioxide and the nano silver have more stable antibacterial performance, and simultaneously, the nano silver and tourmaline powder in electret master batches and nano silicon dioxide act, the electrostatic adsorption effect and the charge storage stability of the filter element are further improved, and the service life of the filter element is prolonged.
In some preferred embodiments, the nano titanium dioxide is anatase nano titanium dioxide, and the average particle size is 1-10 nm.
In some preferred embodiments, the compatibilizer is at least one of polypropylene grafted maleic anhydride, maleic anhydride grafted polyethylene, maleic anhydride grafted POE, glycidyl methacrylate grafted polypropylene, and glycidyl methacrylate grafted POE.
In some preferred embodiments, the polypropylene grafted maleic anhydride has a melt index of 70 to 120g/10 min.
In some preferred embodiments, the dispersant is one or more of stearic acid, polyethylene wax, or liquid paraffin.
The second aspect of the invention provides a preparation process of a multifunctional melt-blown filter element, which comprises the following steps:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, and then carrying out melt blending extrusion and granulation by a double-screw extruder at the temperature of 180-200 ℃ to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, namely slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 180-200 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 220-260 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Examples
The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples.
Example 1
Embodiment 1 provides a multifunctional melt-blown filter element, which comprises 90 parts by weight of PP resin, 3 parts by weight of electret master batch, 3 parts by weight of antibacterial agent, 3 parts by weight of compatilizer and 2 parts by weight of dispersing agent.
The PP resin is metallocene PP resin, the melt index is 1800g/10min, the manufacturer is American Basel, and the brand is MF 650Y.
The electret master batch comprises 75 parts by weight of homopolymerized polypropylene resin; 2 parts of tourmaline powder; 2 parts of nano silicon dioxide; 7 parts of polypropylene grafted maleic anhydride; 7 parts of dibenzylidene sorbitol; 6 parts of erucamide. The homo-polypropylene resin manufacturer is a Korea Xiaoxing with the brand number of HJ 730; the specific surface area of the nano silicon dioxide is 200m2Per g, available from Jia Anheng technology, Inc., Beijing.
The antibacterial agent comprises a mixture of nano titanium dioxide and nano silver, wherein the weight ratio of the nano titanium dioxide to the nano silver is 4: 1; the nano titanium dioxide is anatase nano titanium dioxide, has an average particle size of 3-5 nm, is purchased from Ningbo Ningmi-Ningnan New Material science and technology Co., Ltd, and has the model of MZT-A1. The average grain diameter of the nano silver is 20nm, and the nano silver is purchased from Shanghai Moghai MaoGuo nano technology Co., Ltd and has the model of MG-Ag-20.
The compatilizer is polypropylene grafted maleic anhydride, has the same melt index of 80-110 g/10min as polypropylene grafted maleic anhydride in the electret master batch raw material, and is purchased from Xiamen Esse plastics science and technology Limited company with the model B1A.
The dispersant is stearic acid.
Embodiment 1 also provides a preparation process of the multifunctional melt-blown filter element, which is characterized by comprising the following steps:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, then carrying out melt blending extrusion by a double-screw extruder at the temperature of 180 ℃, and granulating to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 190 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 230 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Example 2
Embodiment 2 provides a multifunctional melt-blown filter element, which comprises, by weight, 95 parts of PP resin, 3 parts of electret master batch, 3 parts of an antibacterial agent, 3 parts of a compatilizer and 2 parts of a dispersing agent.
The PP resin is metallocene PP resin, the melt index is 1800g/10min, the manufacturer is American Basel, and the brand is MF 650Y.
The electret master batch comprises 75 parts by weight of homopolymerized polypropylene resin; 2 parts of tourmaline powder; 2 parts of nano silicon dioxide; 7 parts of polypropylene grafted maleic anhydride; 7 parts of dibenzylidene sorbitol; 6 parts of erucamide. The homo-polypropylene resin manufacturer is a Korea Xiaoxing with the brand number of HJ 730; the specific surface area of the nano silicon dioxide is 200m2Per g, available from Jia Anheng technology, Inc., Beijing.
The antibacterial agent comprises a mixture of nano titanium dioxide and nano silver, wherein the weight ratio of the nano titanium dioxide to the nano silver is 4: 1; the nano titanium dioxide is anatase nano titanium dioxide, has an average particle size of 3-5 nm, is purchased from Ningbo Ningmi-Ningnan New Material science and technology Co., Ltd, and has the model of MZT-A1. The average grain diameter of the nano silver is 20nm, and the nano silver is purchased from Shanghai Moghai MaoGuo nano technology Co., Ltd and has the model of MG-Ag-20.
The compatilizer is polypropylene grafted maleic anhydride, has the same melt index of 80-110 g/10min as polypropylene grafted maleic anhydride in the electret master batch raw material, and is purchased from Xiamen Esse plastics science and technology Limited company with the model B1A.
The dispersant is stearic acid.
Embodiment 2 also provides a preparation process of the multifunctional melt-blown filter element, which is characterized by comprising the following steps:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, then carrying out melt blending extrusion by a double-screw extruder at the temperature of 180 ℃, and granulating to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 190 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 230 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Example 3
Embodiment 3 provides a multifunctional melt-blown filter element, which comprises 93 parts by weight of PP resin, 3 parts by weight of electret master batch, 3 parts by weight of antibacterial agent, 3 parts by weight of compatilizer and 2 parts by weight of dispersing agent.
The PP resin is metallocene PP resin, the melt index is 1800g/10min, the manufacturer is American Basel, and the brand is MF 650Y.
The electret master batch comprises 75 parts by weight of homopolymerized polypropylene resin; 2 parts of tourmaline powder; 2 parts of nano silicon dioxide; 7 parts of polypropylene grafted maleic anhydride; 7 parts of dibenzylidene sorbitol; 6 parts of erucamide. The homo-polypropylene resin manufacturer is a Korea Xiaoxing with the brand number of HJ 730; the specific surface area of the nano silicon dioxide is 200m2Per g, available from Jia Anheng technology, Inc., Beijing.
The antibacterial agent comprises a mixture of nano titanium dioxide and nano silver, wherein the weight ratio of the nano titanium dioxide to the nano silver is 4: 1; the nano titanium dioxide is anatase nano titanium dioxide, has an average particle size of 3-5 nm, is purchased from Ningbo Ningmi-Ningnan New Material science and technology Co., Ltd, and has the model of MZT-A1. The average grain diameter of the nano silver is 20nm, and the nano silver is purchased from Shanghai Moghai MaoGuo nano technology Co., Ltd and has the model of MG-Ag-20.
The compatilizer is polypropylene grafted maleic anhydride, has the same melt index of 80-110 g/10min as polypropylene grafted maleic anhydride in the electret master batch raw material, and is purchased from Xiamen Esse plastics science and technology Limited company with the model B1A.
The dispersant is stearic acid.
Embodiment 3 also provides a preparation process of the multifunctional melt-blown filter element, which is characterized by comprising the following steps:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, then carrying out melt blending extrusion by a double-screw extruder at the temperature of 180 ℃, and granulating to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 190 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 230 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Example 4
Embodiment 4 provides a multifunctional melt-blown filter element, which comprises 90 parts by weight of PP resin, 3 parts by weight of electret master batch, 3 parts by weight of antibacterial agent, 3 parts by weight of compatilizer and 2 parts by weight of dispersing agent.
The PP resin is metallocene PP resin, the melt index is 1800g/10min, the manufacturer is American Basel, and the brand is MF 650Y.
The electret master batch comprises 70 parts of homopolymerized polypropylene resin by weight of preparation raw materials; 2 parts of tourmaline powder; 2 parts of nano silicon dioxide; 7 parts of polypropylene grafted maleic anhydride; 7 parts of dibenzylidene sorbitol; 6 parts of erucamide. The homo-polypropylene resin manufacturer is a Korea Xiaoxing with the brand number of HJ 730; the specific surface area of the nano silicon dioxide is 200m2Per g, available from Jia Anheng technology, Inc., Beijing.
The antibacterial agent comprises a mixture of nano titanium dioxide and nano silver, wherein the weight ratio of the nano titanium dioxide to the nano silver is 4: 1; the nano titanium dioxide is anatase nano titanium dioxide, has an average particle size of 3-5 nm, is purchased from Ningbo Ningmi-Ningnan New Material science and technology Co., Ltd, and has the model of MZT-A1. The average grain diameter of the nano silver is 20nm, and the nano silver is purchased from Shanghai Moghai MaoGuo nano technology Co., Ltd and has the model of MG-Ag-20.
The compatilizer is polypropylene grafted maleic anhydride, has the same melt index of 80-110 g/10min as polypropylene grafted maleic anhydride in the electret master batch raw material, and is purchased from Xiamen Esse plastics science and technology Limited company with the model B1A.
The dispersant is stearic acid.
Embodiment 4 also provides a preparation process of the multifunctional melt-blown filter element, which is characterized by comprising the following steps:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, then carrying out melt blending extrusion by a double-screw extruder at the temperature of 180 ℃, and granulating to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 190 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 230 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Example 5
Embodiment 5 provides a multifunctional melt-blown filter element, which comprises 90 parts by weight of PP resin, 3 parts by weight of electret master batch, 3 parts by weight of antibacterial agent, 3 parts by weight of compatilizer and 2 parts by weight of dispersing agent.
The PP resin is metallocene PP resin, the melt index is 1800g/10min, the manufacturer is American Basel, and the brand is MF 650Y.
The electret master batch comprises 80 parts by weight of homopolymerized polypropylene resin; 2 parts of tourmaline powder; 2 parts of nano silicon dioxide; 7 parts of polypropylene grafted maleic anhydride; 7 parts of dibenzylidene sorbitol; 6 parts of erucamide. The homo-polypropylene resin manufacturer is a Korea Xiaoxing with the brand number of HJ 730; the specific surface area of the nano silicon dioxide is 200m2Per g, available from Jia Anheng technology, Inc., Beijing.
The antibacterial agent comprises a mixture of nano titanium dioxide and nano silver, wherein the weight ratio of the nano titanium dioxide to the nano silver is 4: 1; the nano titanium dioxide is anatase nano titanium dioxide, has an average particle size of 3-5 nm, is purchased from Ningbo Ningmi-Ningnan New Material science and technology Co., Ltd, and has the model of MZT-A1. The average grain diameter of the nano silver is 20nm, and the nano silver is purchased from Shanghai Moghai MaoGuo nano technology Co., Ltd and has the model of MG-Ag-20.
The compatilizer is polypropylene grafted maleic anhydride, has the same melt index of 80-110 g/10min as polypropylene grafted maleic anhydride in the electret master batch raw material, and is purchased from Xiamen Esse plastics science and technology Limited company with the model B1A.
The dispersant is stearic acid.
Embodiment 5 also provides a preparation process of the multifunctional melt-blown filter element, which is characterized by comprising the following steps:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, then carrying out melt blending extrusion by a double-screw extruder at the temperature of 180 ℃, and granulating to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 190 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 230 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Comparative example 1
The comparative example 1 provides a multifunctional melt-blown filter element, and the preparation raw materials comprise 90 parts by weight of PP resin, 3 parts by weight of antibacterial agent, 3 parts by weight of compatilizer and 2 parts by weight of dispersing agent.
The PP resin is metallocene PP resin, the melt index is 1800g/10min, the manufacturer is American Basel, and the brand is MF 650Y.
The antibacterial agent comprises a mixture of nano titanium dioxide and nano silver, wherein the weight ratio of the nano titanium dioxide to the nano silver is 4: 1; the nano titanium dioxide is anatase nano titanium dioxide, has an average particle size of 3-5 nm, is purchased from Ningbo Ningmi-Ningnan New Material science and technology Co., Ltd, and has the model of MZT-A1. The average grain diameter of the nano silver is 20nm, and the nano silver is purchased from Shanghai Moghai MaoGuo nano technology Co., Ltd and has the model of MG-Ag-20.
The compatilizer is polypropylene grafted maleic anhydride, has the same melt index of 80-110 g/10min as polypropylene grafted maleic anhydride in the electret master batch raw material, and is purchased from Xiamen Esse plastics science and technology Limited company with the model B1A.
The dispersant is stearic acid.
Comparative example 1 also provides a process for preparing a multifunctional melt-blown filter element, which is characterized by comprising the following steps:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, then carrying out melt blending extrusion by a double-screw extruder at the temperature of 180 ℃, and granulating to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 190 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 230 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Comparative example 2
The comparative example 2 provides a multifunctional melt-blown filter element, and the preparation raw materials comprise 90 parts by weight of PP resin, 3 parts by weight of electret master batch, 3 parts by weight of compatilizer and 2 parts by weight of dispersing agent.
The PP resin is metallocene PP resin, the melt index is 1800g/10min, the manufacturer is American Basel, and the brand is MF 650Y.
The electret master batch comprises 75 parts by weight of homopolymerized polypropylene resin; 2 parts of tourmaline powder; 2 parts of nano silicon dioxide; 7 parts of polypropylene grafted maleic anhydride; 7 parts of dibenzylidene sorbitol; 6 parts of erucamide. The homo-polypropylene resin manufacturer is a Korea Xiaoxing with the brand number of HJ 730; the specific surface area of the nano silicon dioxide is 200m2Per g, available from Jia Anheng technology, Inc., Beijing.
The compatilizer is polypropylene grafted maleic anhydride, has the same melt index of 80-110 g/10min as polypropylene grafted maleic anhydride in the electret master batch raw material, and is purchased from Xiamen Esse plastics science and technology Limited company with the model B1A.
The dispersant is stearic acid.
Comparative example 2 also provides a process for preparing a multifunctional melt-blown filter element, comprising the steps of:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, then carrying out melt blending extrusion by a double-screw extruder at the temperature of 180 ℃, and granulating to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 190 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 230 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Comparative example 3
The comparative example 3 provides a multifunctional melt-blown filter element, and the preparation raw materials comprise 90 parts by weight of PP resin, 3 parts by weight of electret master batch, 3 parts by weight of antibacterial agent, 3 parts by weight of compatilizer and 2 parts by weight of dispersing agent.
The PP resin is metallocene PP resin, the melt index is 1800g/10min, the manufacturer is American Basel, and the brand is MF 650Y.
The electret master batch comprises 75 parts by weight of homopolymerized polypropylene resin; 2 parts of nano silicon dioxide; poly(s) are polymerized7 parts of propylene grafted maleic anhydride; 7 parts of dibenzylidene sorbitol; 6 parts of erucamide. The homo-polypropylene resin manufacturer is a Korea Xiaoxing with the brand number of HJ 730; the specific surface area of the nano silicon dioxide is 200m2Per g, available from Jia Anheng technology, Inc., Beijing.
The antibacterial agent comprises a mixture of nano titanium dioxide and nano silver, wherein the weight ratio of the nano titanium dioxide to the nano silver is 4: 1; the nano titanium dioxide is anatase nano titanium dioxide, has an average particle size of 3-5 nm, is purchased from Ningbo Ningmi-Ningnan New Material science and technology Co., Ltd, and has the model of MZT-A1. The average grain diameter of the nano silver is 20nm, and the nano silver is purchased from Shanghai Moghai MaoGuo nano technology Co., Ltd and has the model of MG-Ag-20.
The compatilizer is polypropylene grafted maleic anhydride, has the same melt index of 80-110 g/10min as polypropylene grafted maleic anhydride in the electret master batch raw material, and is purchased from Xiamen Esse plastics science and technology Limited company with the model B1A.
The dispersant is stearic acid.
Comparative example 3 also provides a process for preparing a multifunctional melt-blown filter element, which is characterized by comprising the following steps:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, then carrying out melt blending extrusion by a double-screw extruder at the temperature of 180 ℃, and granulating to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 190 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 230 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Comparative example 4
The comparative example 4 provides a multifunctional melt-blown filter element, and the preparation raw materials comprise, by weight, 90 parts of PP resin, 3 parts of electret master batch, 3 parts of antibacterial agent, 3 parts of compatilizer and 2 parts of dispersing agent.
The PP resin is metallocene PP resin, the melt index is 1800g/10min, the manufacturer is American Basel, and the brand is MF 650Y.
The electret master batch comprises 75 parts by weight of homopolymerized polypropylene resin; 2 parts of tourmaline powder; 7 parts of polypropylene grafted maleic anhydride; 7 parts of dibenzylidene sorbitol; 6 parts of erucamide. The homo-polypropylene resin manufacturer is Korea Xiaoxing and the brand is HJ 730.
The antibacterial agent comprises a mixture of nano titanium dioxide and nano silver, wherein the weight ratio of the nano titanium dioxide to the nano silver is 4: 1; the nano titanium dioxide is anatase nano titanium dioxide, has an average particle size of 3-5 nm, is purchased from Ningbo Ningmi-Ningnan New Material science and technology Co., Ltd, and has the model of MZT-A1. The average grain diameter of the nano silver is 20nm, and the nano silver is purchased from Shanghai Moghai MaoGuo nano technology Co., Ltd and has the model of MG-Ag-20.
The compatilizer is polypropylene grafted maleic anhydride, has the same melt index of 80-110 g/10min as polypropylene grafted maleic anhydride in the electret master batch raw material, and is purchased from Xiamen Esse plastics science and technology Limited company with the model B1A.
The dispersant is stearic acid.
Comparative example 4 also provides a process for preparing a multifunctional melt-blown filter element, comprising the steps of:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, then carrying out melt blending extrusion by a double-screw extruder at the temperature of 180 ℃, and granulating to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 190 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 230 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Comparative example 5
The comparative example 5 provides a multifunctional melt-blown filter element, and the preparation raw materials comprise 90 parts by weight of PP resin, 3 parts by weight of electret master batch, 3 parts by weight of antibacterial agent, 3 parts by weight of compatilizer and 2 parts by weight of dispersing agent.
The PP resin is metallocene PP resin, the melt index is 1800g/10min, the manufacturer is American Basel, and the brand is MF 650Y.
The electret master batch comprises 75 parts by weight of homopolymerized polypropylene resin; 2 parts of tourmaline powder; 2 parts of nano silicon dioxide; 7 parts of polypropylene grafted maleic anhydride; 7 parts of dibenzylidene sorbitol; 6 parts of erucamide. The homo-polypropylene resin manufacturer is a Korea Xiaoxing with the brand number of HJ 730; the specific surface area of the nano silicon dioxide is 200m2Per g, available from Jia Anheng technology, Inc., Beijing.
The antibacterial agent is nano silver, the average particle size of the nano silver is 20nm, and the nano silver is purchased from Shanghai Moghai Nguo nanotechnology Co., Ltd and is MG-Ag-20 in model.
The compatilizer is polypropylene grafted maleic anhydride, has the same melt index of 80-110 g/10min as polypropylene grafted maleic anhydride in the electret master batch raw material, and is purchased from Xiamen Esse plastics science and technology Limited company with the model B1A.
The dispersant is stearic acid.
Comparative example 5 also provides a process for preparing a multifunctional melt-blown filter element, comprising the steps of:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, then carrying out melt blending extrusion by a double-screw extruder at the temperature of 180 ℃, and granulating to obtain the electret master batches.
S2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring for 20 minutes, and then adding into a granulator to perform extrusion granulation to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, extruding the sliced melt-blown material by a conveying section, and melting the extruded melt-blown material at 190 ℃; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at 230 ℃, spinning into fiber yarns by a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
Evaluation of Performance
1. Antibacterial and antifungal Property test
The multifunctional melt-blown filter element prepared in the above examples and comparative examples is subjected to an antibacterial and mildewproof test, referring to GB21551.2-2010 test standard, and the mildewproof grade is as follows: no mold growth was scored as grade 0; slight mold growth (10%) was scored as grade 1; mild mold growth (10% -30%) was scored as grade 2; moderate mold growth (30% -60%) was scored as grade 3; severe mold growth (60% -100%) was scored as grade 4; the test results are shown in table 1.
2. Filtration efficiency test
The multifunctional melt-blown filter element prepared in the above examples and comparative examples was tested for filtration efficiency using an automatic TSI8130 filter material tester: the flow rate is set to be 85L/min, the mass median diameter of the sodium chloride aerosol is 0.26 μm, the filtering efficiency is greater than or equal to 95 percent and is recorded as excellent, the filtering efficiency is greater than or equal to 90 percent and less than 95 percent and is recorded as good, and the filtering efficiency is less than 90 percent and is recorded as poor.
TABLE 1
Examples Antibacterial and mildew-proof properties Efficiency of filtration
Example 1 Level 0 Superior food
Example 2 Level 0 Superior food
Example 3 Level 0 Superior food
Example 4 Level 0 Superior food
Example 5 Level 0 Superior food
Comparative example 1 Level 1 Difference (D)
Comparative example 2 Grade 3 Good wine
Comparative example 3 Level 1 Difference (D)
Comparative example 4 Level 1 Good wine
Comparative example 5 Stage 2 Good wine
According to the embodiment and the comparative example, the invention provides the multifunctional melt-blown filter element and the preparation method thereof, and the prepared multifunctional melt-blown filter element has excellent filtering efficiency and antibacterial and mildew-proof properties.
Finally, it should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and 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 (10)

1. A multifunctional melt-blown filter element is characterized in that: the preparation raw materials comprise, by weight, 90-95 parts of PP resin, 1-5 parts of electret master batch, 1-5 parts of antibacterial agent, 1-5 parts of compatilizer and 1-3 parts of dispersing agent.
2. The multifunctional melt-blown filter cartridge of claim 1, wherein: the PP resin is metallocene PP resin, and the melt index is 1700-1900 g/10 min.
3. The multifunctional melt-blown filter cartridge of claim 1, wherein: the electret master batch comprises 70-80 parts by weight of homopolymerized polypropylene resin; 1-3 parts of tourmaline powder; 1-3 parts of nano silicon dioxide; 5-10 parts of polypropylene grafted maleic anhydride; 5-10 parts of dibenzylidene sorbitol; 5-10 parts of erucamide.
4. The multifunctional melt-blown filter cartridge of claim 3, wherein: the specific surface area of the nano silicon dioxide is more than 180m2/g。
5. The multifunctional melt-blown filter cartridge of claim 1, wherein: the antibacterial agent comprises at least one of nano titanium dioxide, nano silver and chitin.
6. The multifunctional melt-blown filter cartridge of claim 5, wherein: the nano titanium dioxide is anatase nano titanium dioxide, and the average particle size is 1-10 nm.
7. The multifunctional melt-blown filter cartridge of claim 1, wherein: the compatilizer is at least one of polypropylene grafted maleic anhydride, maleic anhydride grafted polyethylene, maleic anhydride grafted POE, glycidyl methacrylate grafted polypropylene and glycidyl methacrylate grafted POE.
8. The multifunctional melt-blown filter cartridge of claim 7, wherein: the melt index of the polypropylene grafted maleic anhydride is 70-120 g/10 min.
9. The multifunctional melt-blown filter cartridge of claim 4, wherein: the dispersing agent is one or more of stearic acid, polyethylene wax or liquid paraffin.
10. A preparation process of the multifunctional melt-blown filter element according to any one of claims 1 to 9, characterized by comprising the following steps:
s1, preparing electret master batches, uniformly mixing the homo-polypropylene resin, tourmaline powder, nano silicon dioxide, polypropylene grafted maleic anhydride, dibenzylidene sorbitol and erucamide by a mixer according to the formula amount, and then carrying out melt blending extrusion and granulation by a double-screw extruder to obtain the electret master batches;
s2, preparing a melt-blown material, putting the PP resin with the formula amount into a mixer, stirring for 1-5 minutes, adding the static electricity standing agent, the antibacterial agent, the compatilizer and the dispersing agent with the formula amount, mixing and stirring, adding into a granulator after uniformly stirring, and extruding and granulating to obtain the melt-blown material;
s3, preparing a multifunctional melt-blown filter element, slicing the melt-blown material prepared in the S2 by using a screw extruder, and extruding and melting the melt-blown material by a conveying section; filtering impurities, metering by a spinning pump, preparing a high-temperature melt at the temperature of 200-315 ℃, spinning the high-temperature melt into fiber yarns through a die head, and spinning the prepared fiber yarns into fiber webs; and (3) the fiber web is subjected to high-pressure electret, then wound into a tubular shape, and cut off in sections to obtain the multifunctional melt-blown filter element.
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CN113463270A (en) * 2021-06-22 2021-10-01 武汉纺织大学 Polypropylene melt-blown non-woven fabric based on composite antibacterial electret master batch and preparation method
CN113463270B (en) * 2021-06-22 2022-10-04 武汉纺织大学 Polypropylene melt-blown non-woven fabric based on composite antibacterial electret master batch and preparation method
CN113699641A (en) * 2021-07-26 2021-11-26 绍兴顺金纺织窗材有限公司 Formula and manufacturing process of recyclable environment-friendly fabric
CN115340722A (en) * 2021-12-30 2022-11-15 称道新材料科技(上海)有限公司 Temperature-resistant melt-blown material and preparation process thereof
CN114288756A (en) * 2021-12-31 2022-04-08 浙江金海高科股份有限公司 Preparation method of air filter screen, air filter screen and application of air filter screen
CN115178015A (en) * 2022-08-03 2022-10-14 浙江金海高科股份有限公司 Composite air filter screen and manufacturing method thereof

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