CN111533995A - Melt-blown nonwoven material with electret effect and preparation method thereof - Google Patents
Melt-blown nonwoven material with electret effect and preparation method thereof Download PDFInfo
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- CN111533995A CN111533995A CN202010430460.3A CN202010430460A CN111533995A CN 111533995 A CN111533995 A CN 111533995A CN 202010430460 A CN202010430460 A CN 202010430460A CN 111533995 A CN111533995 A CN 111533995A
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- nonwoven material
- blown nonwoven
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- 239000000463 material Substances 0.000 title claims abstract description 71
- 239000004750 melt-blown nonwoven Substances 0.000 title claims abstract description 37
- 230000000694 effects Effects 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title abstract description 7
- -1 polypropylene Polymers 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 15
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 12
- 239000004743 Polypropylene Substances 0.000 claims abstract description 12
- 229920001155 polypropylene Polymers 0.000 claims abstract description 12
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 11
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 9
- 150000002978 peroxides Chemical class 0.000 claims abstract description 9
- 239000004698 Polyethylene Substances 0.000 claims abstract description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 6
- 229920000573 polyethylene Polymers 0.000 claims abstract description 6
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims abstract description 5
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 5
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000194 fatty acid Substances 0.000 claims abstract description 5
- 229930195729 fatty acid Natural products 0.000 claims abstract description 5
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 5
- 239000005033 polyvinylidene chloride Substances 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims abstract description 5
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 36
- 238000002156 mixing Methods 0.000 claims description 22
- 239000000155 melt Substances 0.000 claims description 14
- 238000001125 extrusion Methods 0.000 claims description 13
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 6
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 claims description 5
- QUAMTGJKVDWJEQ-UHFFFAOYSA-N octabenzone Chemical compound OC1=CC(OCCCCCCCC)=CC=C1C(=O)C1=CC=CC=C1 QUAMTGJKVDWJEQ-UHFFFAOYSA-N 0.000 claims description 4
- ARVUDIQYNJVQIW-UHFFFAOYSA-N (4-dodecoxy-2-hydroxyphenyl)-phenylmethanone Chemical compound OC1=CC(OCCCCCCCCCCCC)=CC=C1C(=O)C1=CC=CC=C1 ARVUDIQYNJVQIW-UHFFFAOYSA-N 0.000 claims description 2
- ZXDDPOHVAMWLBH-UHFFFAOYSA-N 2,4-Dihydroxybenzophenone Chemical compound OC1=CC(O)=CC=C1C(=O)C1=CC=CC=C1 ZXDDPOHVAMWLBH-UHFFFAOYSA-N 0.000 claims description 2
- IYAZLDLPUNDVAG-UHFFFAOYSA-N 2-(benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol Chemical compound CC(C)(C)CC(C)(C)C1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 IYAZLDLPUNDVAG-UHFFFAOYSA-N 0.000 claims description 2
- UWSMKYBKUPAEJQ-UHFFFAOYSA-N 5-Chloro-2-(3,5-di-tert-butyl-2-hydroxyphenyl)-2H-benzotriazole Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC(N2N=C3C=C(Cl)C=CC3=N2)=C1O UWSMKYBKUPAEJQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000007983 Tris buffer Substances 0.000 claims description 2
- OCWYEMOEOGEQAN-UHFFFAOYSA-N bumetrizole Chemical compound CC(C)(C)C1=CC(C)=CC(N2N=C3C=C(Cl)C=CC3=N2)=C1O OCWYEMOEOGEQAN-UHFFFAOYSA-N 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 229920001912 maleic anhydride grafted polyethylene Polymers 0.000 claims description 2
- 229920001910 maleic anhydride grafted polyolefin Polymers 0.000 claims description 2
- DXGLGDHPHMLXJC-UHFFFAOYSA-N oxybenzone Chemical compound OC1=CC(OC)=CC=C1C(=O)C1=CC=CC=C1 DXGLGDHPHMLXJC-UHFFFAOYSA-N 0.000 claims description 2
- 229940116351 sebacate Drugs 0.000 claims description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims 1
- DUWWHGPELOTTOE-UHFFFAOYSA-N n-(5-chloro-2,4-dimethoxyphenyl)-3-oxobutanamide Chemical compound COC1=CC(OC)=C(NC(=O)CC(C)=O)C=C1Cl DUWWHGPELOTTOE-UHFFFAOYSA-N 0.000 claims 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims 1
- 235000019260 propionic acid Nutrition 0.000 claims 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims 1
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 claims 1
- 239000004594 Masterbatch (MB) Substances 0.000 abstract description 13
- 239000011347 resin Substances 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 13
- 238000001914 filtration Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 239000004744 fabric Substances 0.000 description 5
- 239000000835 fiber Substances 0.000 description 3
- 229920005629 polypropylene homopolymer Polymers 0.000 description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000004887 air purification Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Nonwoven Fabrics (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a melt-blown nonwoven material which comprises the following components in parts by weight: 80-95 parts of polypropylene; 0-15 parts of polyethylene; 1-5 parts of electret material; 0.1-1 part of peroxide; 0-2 parts of a compatilizer; 0.05-0.5 part of antioxidant; 0.05-0.5 part of anti-aging agent; the electret material is one or more selected from fatty acid with 6-20 carbon atoms or salt thereof, fumed silica, titanium dioxide, calcium carbonate, talcum powder, polytetrafluoroethylene and polyvinylidene chloride. According to the melt-blown non-woven material with the electret effect and the preparation method thereof, in the production process of the melt-blown non-woven material, the electret material is added together, so that the electret material can be better dispersed in a melt-blown resin base material, and meanwhile, the problem of the fluidity difference between the electret master batch and the melt-blown resin caused by the adoption of the electret master batch method is solved.
Description
Technical Field
The invention relates to the field of high polymer materials, in particular to a melt-blown non-woven material with an electret effect and a preparation method thereof.
Background
Research shows that melt-blown polypropylene fiber treated by electret has the function of adsorbing particles in air due to the surface charge. Melt-blown polypropylene and related nonwoven materials have been used in a number of applications in the air purification and medical health fields, such as air conditioning filters, medical protective masks and dust masks. However, the addition of the electret material is realized by preparing the functional master batch at present. The dispersion of the electret material in the electret master batch and the matching of the base material resin and the melt-blown resin become keys. In the practical production, because the actual addition amount of the electret material is very low, about 0.1-2%, the electret material is difficult to be completely and uniformly distributed when being added into a screw rod produced by melt-blown fabric, thereby causing great deviation on the filtering performance of a product. In addition, the quality fluctuation of the downstream melt-blown cloth production can be caused by the fluidity difference of the electret master batch and the melt-blown resin, and the filtering performance of each batch can be influenced in severe cases.
Disclosure of Invention
The invention aims to solve the problems and provide a melt-blown non-woven material with an electret effect and a preparation method thereof.
The purpose of the invention is realized as follows:
the melt-blown nonwoven material comprises the following components in parts by weight:
the electret material is one or more selected from fatty acid with 6-20 carbon atoms or salt thereof, fumed silica, titanium dioxide, calcium carbonate, talcum powder, polytetrafluoroethylene and polyvinylidene chloride.
The melt-blown nonwoven material with electret effect is characterized in that the melt index of polypropylene at 230 ℃ and 2.16Kg is 20-1000g/10 min.
The melt-blown nonwoven material with electret effect is characterized in that the melt index of the polyethylene at 190 ℃ and 2.16Kg is 20-1000g/10 min.
The meltblown nonwoven material with electret effect is prepared by the method, wherein the peroxide is one of di-tert-butyl peroxide or tert-butyl peroxide.
The melt-blown nonwoven material with electret effect is characterized in that the compatilizer is one or more selected from maleic anhydride grafted polypropylene, maleic anhydride grafted polyethylene, maleic anhydride grafted polyolefin elastomer, glycidyl methacrylate grafted polypropylene, glycidyl methacrylate grafted POE and glycidyl methacrylate grafted polypropylene.
The melt-blown nonwoven material with electret effect is characterized in that the antioxidant comprises tris (2, 4-di-tert-butyl) phenyl phosphite and tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester.
The melt-blown non-woven material with electret effect is provided, wherein, the anti-aging agent is one or more selected from bis-2, 2,6, 6-tetramethylpiperidinol sebacate, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2, 4-dihydroxybenzophenone, 2-hydroxy-4-n-octyloxybenzophenone, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy-3, 5-di-tert-butylphenyl) -5-chlorobenzotriazole and 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole.
The invention relates to a preparation method of a melt-blown nonwoven material with electret effect, which comprises the following steps:
the method comprises the following steps: preparing raw materials according to the following components in parts by weight:
the electret material is one or more selected from fatty acid with 6-20 carbon atoms or salt thereof, fumed silica, titanium dioxide, calcium carbonate, talcum powder, polytetrafluoroethylene and polyvinylidene chloride;
step two: uniformly mixing the polypropylene, the polyethylene and the electret material in the step one by using a high-speed machine to obtain a first mixture, adding the first mixture from the tail end of a screw extruder, carrying out melt extrusion to form a melt, uniformly mixing the peroxide, the compatilizer, the antioxidant and the anti-aging agent in the step one by using the high-speed machine to obtain a second mixture, adding the second mixture from the front end of the screw extruder, and mixing the second mixture with the melt obtained after the first mixture is subjected to melt extrusion to obtain a blended melt;
step three: and D, cooling and granulating the blended melt in the step two.
The preparation method of the melt-blown non-woven material with the electret effect comprises the steps that the temperature of the melting section of the screw extruder is 160-220 ℃, and the screw extruder is provided with double screws with the length-diameter ratio of 50.
The invention has the following beneficial effects:
the electret material is added together, so that the electret material can be better dispersed in the formed melt-blown non-woven material, and the problem of the fluidity difference between the master batch and the melt-blown resin caused by adopting an electret master batch method is solved; meanwhile, in order to avoid the reaction of the electret material with peroxide in the processing process, the peroxide is added from the front part of the screw in the processing process, and the electret material is added from the tail end of the screw through a separate feeder, so that the problem is avoided.
The melt-blown non-woven material with the electret effect can be directly processed into melt-blown cloth, and melt-blown materials produced in the traditional mode need to be mixed with electret master batches.
Detailed Description
The present invention will be further described with reference to the following examples.
The raw material components and parts by weight of examples 1 to 3 and comparative example 1 are shown in table 1:
TABLE 1 raw material Components and weight fractions of examples 1 to 3 and comparative example 1
Example 1:
the method comprises the following steps: preparing raw materials according to the components and parts by weight in the table 1;
step two: uniformly mixing the homo-polypropylene, the zinc stearate and the fumed silica prepared in the step one by using a high-speed machine to obtain a first mixture, adding the first mixture from the tail end of a screw extruder, carrying out melt extrusion to form a melt, uniformly mixing the di-tert-butyl peroxide, the maleic anhydride grafted polypropylene, the antioxidant and the anti-aging agent prepared in the step one by using the high-speed machine to obtain a second mixture, adding the second mixture from the front end of the screw extruder, and mixing the second mixture with the melt obtained after the first mixture is subjected to melt extrusion to obtain a blended melt; the temperature of the melting section of the screw extruder is 160-220 ℃, and the screw extruder is provided with a double screw with the length-diameter ratio of 50;
step three: and D, cooling and granulating the blended melt in the step two.
Example 2:
the method comprises the following steps: preparing raw materials according to the components and parts by weight in the table 1;
step two: uniformly mixing the prepared homopolymerized polypropylene, zinc stearate and calcium carbonate in the step one by using a high-speed machine to obtain a first mixture, adding the first mixture from the tail end of a screw extruder, carrying out melt extrusion to form a melt, uniformly mixing the prepared di-tert-butyl peroxide, maleic anhydride grafted polypropylene, an antioxidant and an anti-aging agent in the step one by using the high-speed machine to obtain a second mixture, adding the second mixture from the front end of the screw extruder, and mixing the second mixture with the melt obtained after the first mixture is subjected to melt extrusion to obtain a blended melt; the temperature of the melting section of the screw extruder is 160-220 ℃, and the screw extruder is provided with a double screw with the length-diameter ratio of 50;
step three: and D, cooling and granulating the blended melt in the step two.
Example 3:
the method comprises the following steps: preparing raw materials according to the components and parts by weight in the table 1;
step two: uniformly mixing the homo-polypropylene, the polyethylene, the zinc stearate and the fumed silica prepared in the step one by using a high-speed machine to obtain a first mixture, adding the first mixture from the tail end of a screw extruder, carrying out melt extrusion to form a melt, uniformly mixing the di-tert-butyl peroxide, the maleic anhydride grafted polypropylene, the antioxidant and the anti-aging agent prepared in the step one by using the high-speed machine to obtain a second mixture, adding the second mixture from the front end of the screw extruder, and mixing the second mixture with the melt obtained after the first mixture is subjected to melt extrusion to obtain a blended melt; the temperature of the melting section of the screw extruder is 160-220 ℃, and the screw extruder is provided with a double screw with the length-diameter ratio of 50;
step three: and D, cooling and granulating the blended melt in the step two.
Comparative example 1:
s1: preparing raw materials according to the components and parts by weight in the table 1;
s2: uniformly mixing the prepared homo-polypropylene, di-tert-butyl peroxide, antioxidant and anti-aging agent of S1 by using a high-speed machine to obtain a mixture, and adding the mixture into a screw extruder for melt blending and extrusion; the temperature of the melting section of the screw extruder is 160-220 ℃, and the screw extruder is provided with a double screw with the length-diameter ratio of 50;
s3: and granulating and drying the mixture obtained by melt blending and extruding in the S2 to obtain the melt-blown nonwoven material.
Comparative example 2:
s1: taking 94 parts of the melt-blown non-woven material obtained in S3 of comparative example 1, and then taking 5 parts of fumed silica, 0.1 part of antioxidant and 0.1 part of anti-aging agent;
s2: uniformly mixing the melt-blown non-woven material obtained in the step S1, fumed silica, an antioxidant and an anti-aging agent in a high-speed machine to obtain a mixture, and adding the mixture into a screw extruder for melt blending and extrusion; the temperature of the melting section of the screw extruder is 160-220 ℃, and the screw extruder is provided with a double screw with the length-diameter ratio of 50.
S3: granulating and drying the mixture obtained by melt blending and extrusion in the S2 to obtain electret master batches;
s4: 2 parts of electret masterbatch obtained in S3 and 98 parts of melt-blown nonwoven material obtained in S3 of example 1;
s5: and (4) uniformly mixing the electret master batch obtained in the step S4 with the melt-blown non-woven material in a high-speed machine.
After melting the melt-blown non-woven materials prepared in the examples 1-3 and the comparative examples 1-2, keeping the temperature constant at 250 ℃ in a pipeline, metering by a metering pump, spraying out by a spinneret plate to form fibers, and drawing the fibers by hot air at the constant temperature and the constant pressure of 250 ℃ at 220 ℃ and 1MPa to form a test sample.
And (3) carrying out infrared radiation heat treatment, 10kV voltage electret treatment and circulating cooling on the test sample, and rolling to obtain the melt-blown material. The melt-blown material is tested by a TSI8130 automatic filter material tester.
The medium adopts NaCl particles with the number median diameter of 0.075 +/-0.02 mu m, the test flow is 85L/min, and the filtration efficiency and the resistance test are carried out.
The test results are shown in table 2:
TABLE 2 test results of examples 1-3 and comparative examples 1-2
As can be seen by combining examples 1-3, comparative examples 1-2 and Table 2, comparing the test results of comparative example 1 with examples 1-3 can find that: the technical scheme of the invention avoids the reaction of the electret material and peroxide in the processing process, the peroxide is added from the front part of the screw in the processing process, the electret material is added from the tail end of the screw through a separate feeder, and the electret material is added together, so that the electret material can be better dispersed in the formed melt-blown non-woven material, compared with the condition that the electret material is not added in comparative example 1, the filtration efficiency is greatly improved, and the filtration efficiency has important significance for the fields of air purification and medical sanitation of the melt-blown non-woven material, meanwhile, compared with comparative example 2, comparative example 2 is the technical scheme commonly used in the industrial production at present, the electret material is required to be prepared into the electret master batch firstly, and then the electret master batch is uniformly mixed in the melt-blown non-woven material (without the electret material), and the flowability difference of the electret master batch and the melt-blown non-woven material (without the electret material) in the technical scheme can also cause The quality fluctuation of downstream melt-blown fabric production can affect the filtering performance of each batch in severe cases, and it can be found from table 2 that the technical scheme of the invention has great advantages in processing cost and yield under the condition that the filtering efficiency and filtering resistance are not equal to those of comparative example 2. The melt-blown non-woven material is directly processed into melt-blown cloth, and the melt-blown material and the electret master batch do not need to be mixed like the traditional process, so that the product quality is improved. Meanwhile, the yield is greatly improved, and the unit processing cost is reduced.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (9)
1. The melt-blown nonwoven material with electret effect is characterized by comprising the following components in parts by weight:
the electret material is one or more selected from fatty acid with 6-20 carbon atoms or salts thereof, fumed silica, titanium dioxide, calcium carbonate, talcum powder, polytetrafluoroethylene and polyvinylidene chloride.
2. The melt-blown nonwoven material with electret effect of claim 1, wherein the polypropylene has a melt index of 20 to 1000g/10min at 230 ℃ and 2.16 Kg.
3. The melt-blown nonwoven material with electret effect of claim 1, wherein the polyethylene has a melt index of between 20 and 1000g/10min at 190 ℃ and 2.16 Kg.
4. The electret melt-blown nonwoven material of claim 1 wherein the peroxide is one of di-t-butyl peroxide or t-butyl peroxide.
5. The melt-blown nonwoven material with electret effect of claim 1, wherein the compatibilizer is one or more selected from the group consisting of maleic anhydride grafted polypropylene, maleic anhydride grafted polyethylene, maleic anhydride grafted polyolefin elastomer, glycidyl methacrylate grafted polypropylene, glycidyl methacrylate grafted POE, and glycidyl methacrylate grafted polypropylene.
6. An electret melt-blown nonwoven material as claimed in claim 1 wherein the antioxidants comprise tris (2, 4-di-tert-butyl) phenylphosphite and tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propanoic acid ] pentaerythritol ester.
7. An electret melt-blown nonwoven material as claimed in claim 1, the anti-aging agent is selected from one or more of bis-2, 2,6, 6-tetramethylpiperidinol sebacate, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-dodecyloxy benzophenone, 2, 4-dihydroxy benzophenone, 2-hydroxy-4-n-octyloxy benzophenone, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy-3, 5-di-tert-butylphenyl) -5-chlorobenzotriazole and 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole.
8. The method for preparing a melt-blown nonwoven material with electret effect according to claim 1, comprising the steps of:
the method comprises the following steps: preparing raw materials according to the following components in parts by weight:
the electret material is selected from one or more of fatty acid with 6-20 carbon atoms or salts thereof, fumed silica, titanium dioxide, calcium carbonate, talcum powder, polytetrafluoroethylene and polyvinylidene chloride;
step two: uniformly mixing the polypropylene, the polyethylene and the electret material in the step one by using a high-speed machine to obtain a first mixture, adding the first mixture from the tail end of a screw extruder, carrying out melt extrusion to form a melt, uniformly mixing the peroxide, the compatilizer, the antioxidant and the anti-aging agent in the step one by using the high-speed machine to obtain a second mixture, adding the second mixture from the front end of the screw extruder, and mixing the second mixture with the melt obtained after the first mixture is subjected to melt extrusion to obtain a blended melt;
step three: and D, cooling and granulating the blended melt in the step two.
9. The method according to claim 8, wherein the melting temperature of the screw extruder is 160-220 ℃, and the screw extruder has a double screw with a length-diameter ratio of 50.
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| CN111909455A (en) * | 2020-08-20 | 2020-11-10 | 东莞市奥能工程塑料有限公司 | High-oiliness particle filtering efficiency melt-blown material and preparation method and application thereof |
| CN112094456A (en) * | 2020-09-22 | 2020-12-18 | 北京中科纳清科技股份有限公司 | Electret material and preparation method thereof |
| CN112175288A (en) * | 2020-09-22 | 2021-01-05 | 江苏金陵奥普特高分子材料有限公司 | Composite high-fluidity electret master batch and preparation method thereof |
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| CN112300485A (en) * | 2020-09-28 | 2021-02-02 | 重庆科聚孚工程塑料有限责任公司 | Special ultrahigh-fluidity polypropylene material for melt-blowing and preparation method thereof |
| CN112646272A (en) * | 2020-12-22 | 2021-04-13 | 浙江普利特新材料有限公司 | Low-odor low-emission electret melt-blown polypropylene and preparation method thereof |
| CN112662061A (en) * | 2020-12-18 | 2021-04-16 | 广东金发科技有限公司 | Low-shrinkage modified polypropylene resin and preparation method and application thereof |
| CN112708198A (en) * | 2020-12-28 | 2021-04-27 | 台州学院 | High-compatibility polypropylene electret master batch, preparation method thereof and melt-blown fabric |
| CN112745578A (en) * | 2021-01-20 | 2021-05-04 | 称道新材料科技(上海)有限公司 | High-efficiency low-resistance melt-blown material and preparation process thereof |
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| CN112175288A (en) * | 2020-09-22 | 2021-01-05 | 江苏金陵奥普特高分子材料有限公司 | Composite high-fluidity electret master batch and preparation method thereof |
| CN114277507A (en) * | 2020-09-27 | 2022-04-05 | 合肥杰事杰新材料股份有限公司 | Melt-blown nonwoven material with high-efficiency filtering performance and preparation method thereof |
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| CN112646272A (en) * | 2020-12-22 | 2021-04-13 | 浙江普利特新材料有限公司 | Low-odor low-emission electret melt-blown polypropylene and preparation method thereof |
| CN112708198A (en) * | 2020-12-28 | 2021-04-27 | 台州学院 | High-compatibility polypropylene electret master batch, preparation method thereof and melt-blown fabric |
| CN112708198B (en) * | 2020-12-28 | 2022-04-01 | 台州学院 | High-compatibility polypropylene electret master batch, preparation method thereof and melt-blown fabric |
| CN112745578A (en) * | 2021-01-20 | 2021-05-04 | 称道新材料科技(上海)有限公司 | High-efficiency low-resistance melt-blown material and preparation process thereof |
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