CN111548553A - Low odor, long lasting electret effect polypropylene homopolymers for melt blown fibers - Google Patents
Low odor, long lasting electret effect polypropylene homopolymers for melt blown fibers Download PDFInfo
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- CN111548553A CN111548553A CN202010244267.0A CN202010244267A CN111548553A CN 111548553 A CN111548553 A CN 111548553A CN 202010244267 A CN202010244267 A CN 202010244267A CN 111548553 A CN111548553 A CN 111548553A
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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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
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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
- C08L2203/00—Applications
- C08L2203/12—Applications used for fibers
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses a low-odor and long-acting electret polypropylene homopolymer for melt-blown fibers, which is characterized in that: the long-acting electrostatic electret polypropylene composite material comprises (A) homopolymerized polypropylene, (B) syndiotactic polypropylene and (C) long-acting electrostatic electret components, wherein the mass ratio of the components is 80-90 percent to 10-2 percent to 0.5-3 percent. The polypropylene composition has i) a melt flow rate MFR (230 ℃/2.16kg) of 100 to 2000g/10min measured according to ISO 1133, ii) has a long-lasting electrostatic electret effect, iii) has a good spinning smell.
Description
Technical Field
The invention relates to a novel polypropylene composition comprising a propylene homopolymer and a long-acting electrostatic electret component, melt-blown fibers or melt-blown fabrics prepared from the polypropylene composition, end products prepared from the melt-blown fibers or melt-blown fabrics and application fields thereof.
Background
The kind of the nonwoven material may be classified into a web-forming manner, a reinforcing manner or a use. The web formation method can be divided into dry web formation (mechanical carding web formation, air web formation), wet web formation (cylinder method, inclined web formation) and polymer spinning web formation (spunbonding method, melt-blowing method, film splitting method, electrostatic method). The reinforcement methods can be classified into mechanical reinforcement (needle punching, spunlacing, stitch-bonding), thermal bonding (hot rolling, hot air, ultrasonic bonding), and chemical bonding (dipping, spraying, foaming, printing, solvent, etc.). According to the application, the material can be divided into medical sanitary material, filtering material, geosynthetic material, vehicle material, building material, material for electric and electronic industries, packaging material, agricultural material, household decorative material and the like, and is applied to the aspects of daily life.
The medical sanitary non-woven material and the non-woven material for filtering have wide application fields, and mainly comprise the protective mask, protective clothing, isolation clothing, operating clothing, children masks and the like. These materials are generally compounded from spunbond nonwoven materials and meltblown nonwoven materials. The spun-bonded non-woven material is prepared by extruding a polymer from a spinning hole after high-temperature melting, lengthening and thinning under the drawing action of air, and forming a net after a cold zone. Spunbond nonwoven materials are further classified as single component spunbond materials and bicomponent spunbond materials. The spun-bonded non-woven material has the characteristics of high strength, abrasion resistance, good hand feeling and the like, mainly plays a supporting role in the protective mask, has certain filtering efficiency and mainly intercepts large-particle-size particles. The melt-blown material is prepared by melting polymer master batches, extruding the melted polymer master batches from a spinneret orifice to form melt trickle, drafting the melt trickle under the action of high-temperature and high-speed airflow, depositing the melt trickle on a receiving device, and reinforcing the melt trickle by depending on self residual heat. The melt-blown material has the characteristics of small fiber diameter, small pore diameter, large specific surface area and high porosity. The melt-blown non-woven material is a core element for filtering in the protective mask, and can efficiently filter particles. Meanwhile, the melt-blown technology can be combined with the electret technology, and the strong electrostatic field created by a large amount of charges can greatly improve the filtering efficiency of the melt-blown material without increasing the filtering resistance.
Most melt-blown polypropylene circulating in the current market is prepared by adopting an incomplete degradation method, the spinning smell is large, the finished melt-blown fabric has peculiar smell and is durable and not scattered, the process level of the domestic electrostatic electret master batch is limited to be uneven, and the retention time of the electrostatic electret effect of the finished melt-blown fabric is usually within 3 months or even shorter.
Disclosure of Invention
Therefore, the invention aims to provide a homo-polypropylene composition which has low spinning smell and long-acting electrostatic electret effect and can be used for preparing melt-blown fibers, and the problems of large spinning smell and short duration of electrostatic electret effect of conventional melt-blown fibers are solved based on the homo-polypropylene composition.
The discovery of the present invention is that meltblown fibers and meltblown fabrics prepared in the presence of syndiotactic polypropylene and a long-acting electrostatic electret component have excellent finished odor and a greatly extended electrostatic electret duration.
Accordingly, the present invention relates to a polypropylene composition suitable for preparing melt blown polypropylene fibers, comprising the following components in parts by weight:
(A) 80-90% of low molecular weight distribution homopolymerized polypropylene;
(B) 10-20% of low-odor syndiotactic polypropylene;
(C) long-acting electrostatic electret 0.5-3%;
the homopolymerized polypropylene of the component (A) has the following characteristics: i) molecular weight distribution < 3, ii) ash and impurity content < 150 polypropylene m, iii) residual DTBP content < 5 mg/kg.
The component (A) can be prepared by any known viscosity-reducing degradation method by using conventional homopolymerized polypropylene granules and/or powder with the melt index within the range of 3-150g/10min as a matrix, for example, a specific example, the component (A) is prepared by uniformly mixing the matrix and a proper amount of peroxide and granulating by a double screw extruder, wherein the addition amount of the peroxide is in a negative correlation with the melt index, the extrusion temperature and the screw action time of the matrix homopolymerized polypropylene, and an addition trigger point exists.
The syndiotactic polypropylene of component (B) should have the following characteristics: i) the melting point Tm is 60-100 ℃, and the difference between the softening point Ts and the Tm is less than 20 ℃; iii) high flowability, melt flow rate MFR (230 ℃/2.16kg) measured according to ISO 1133 of 900 to 2000g/10min, iv) viscosity coefficient in the range 8500-.
The syndiotactic polypropylene is homopolymerized polypropylene which is prepared between high isotactic polypropylene and atactic polypropylene based on a metallocene catalysis technology, has good fluidity and easy processing, low melting point and low adaptability to lower processing temperature, is soft, has low crystallinity and good smell, and the component has the function of reducing the integral spinning smell of the homopolymerized polypropylene composition.
The odor problem sources of the homo-polypropylene composition comprise homo-polypropylene degradation agent residues and small molecular oligomers C6-C14 generated by high-temperature processing, so that the odor improvement action mechanism of the syndiotactic polypropylene comprises the following points: 1) the high fluidity of the self-body, in a specific embodiment, the melt index is 2000g/10min, so that the addition amount of the degradation agent can be reduced as much as possible; 2) lower melting point, higher processing temperature helps reduce the amount of degradation agent added, but higher temperatures worsen the odor of the composition, and therefore, lowering the processing temperature is an effective way to enhance the odor, and selecting a component with a lower melting point that is more easily processed helps lower the processing temperature of the overall homopolypropylene composition.
The long-acting electrostatic electret component of the component (C) should have the following characteristics: i) ash and impurity content less than 100 polypropylene m, ii) fast electret ability in high voltage electrostatic field; iii) contains a permanent magnetic substance.
The effectiveness of long-acting electrostatic electret components is based on two aspects, electrostatic electret ability and preservation of electrostatic electret effect.
The substance with electrostatic electret capability should be electron-deficient, such as H +, N, O, F and other elements of positive ions or tourmaline powder, the electrostatic electret process is illustrated by taking the tourmaline powder as an example, when the environmental temperature and pressure of the tourmaline crystal change or an external electric field is applied, charged particles in the crystal generate relative displacement, positive and negative charge centers are separated, and the total electric moment of the crystal changes, so that polarization charges are generated. The spontaneous polarization effect of the tourmaline is shown in that an electrostatic field with a c-axis surface as two poles exists around a tourmaline crystal. When the crystal grain of the tourmaline is very small, the effect of the tourmaline particle is equivalent to an electric dipole, and the electric field intensity is maximum in the direction parallel to the c axis because the positive and negative electric charge effects are mutually offset, and the spontaneous polarization effect of the tourmaline is permanent and closely related to the structure and the components of the tourmaline.
The maintenance of the electrostatic electret effect is divided into two aspects, namely the strength of the own polarization capability of the electrostatic electret substance, which is mentioned above and related to the structure and components thereof, and is not described herein again; on the other hand, the permanent magnetic substance mentioned in the invention can be an organic or inorganic metal complex containing Fe, Ni, Nd and the like, and the function of the permanent magnetic substance is that the melt-blown fiber and/or the melt-blown cloth prepared by the homopolymerized polypropylene composition of the invention become one or a group of tiny permanent magnets.
According to the basic principle of Faraday's law of electromagnetic induction, when these fibers are being made into terminal articles and produce the removal, will constantly cut the geomagnetic field to possess the function of generating electricity certainly, and a fiber is exactly a tiny from the electricity generation unit, delays the decay of static electret effect through generating electricity certainly.
The long-acting electrostatic electret component can be in the form of particles, powder or microbeads, the carrier can be linear low-density polyethylene or high-melting homo-polypropylene with the melting index of more than 500, and in a specific embodiment, the linear low-density polyethylene is used as the long-acting electrostatic electret component of the carrier to additionally endow the melt-blown fabric with soft hand feeling.
The invention also relates to meltblown fibers having a diameter of 1-4 μm, said fibers comprising, preferably comprising at least 95.0 wt% of a polypropylene composition as defined herein.
The present invention further relates to articles comprising the meltblown fibers and/or meltblown fabrics defined herein.
The invention also relates to articles comprising the meltblown fibers and/or meltblown fabrics, wherein the articles are selected from the group consisting of masks, protective garments, air-liquid filtration media, sanitary napkins, diapers, and the like.
Drawings
FIG. 1 is a meltblown fiber diameter profile;
FIG. 2 is an XRD pattern of a meltblown common fiber; wherein, (a) meltblown fibers; (B) common fiber
FIG. 3 is a surface potential tester of an electrostatic ball;
FIG. 4 is a graph of the molecular weight distribution of melt blown polypropylene.
Detailed Description
The technical solution of the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments.
Example 1
The polypropylene composition according to the present invention comprises a low molecular weight homo-polypropylene as component (a), a syndiotactic polypropylene as component (B) and a long-acting electrostatic electret as component (C).
In the embodiment, the homopolymerized polypropylene of the component (A) is subjected to visbreaking degradation, the molecular weight distribution is 2.11, the ash content and the impurity content are 100 polypropylene m, the DTBP residual quantity is less than 2.5mg/kg, the melt index is about 1500 +/-50 g/10min, and the mask is used as a medical N95 mask.
The preparation mechanism of the homopolymerized polypropylene is as follows: visbreaking a low melting homo-polypropylene base under more controlled conditions using heat and peroxide, where peroxide dominates and the molar mass distribution (MWD) is narrowed.
Specifically, the polypropylene is obtained by taking conventional homo-polypropylene (2822E, EM, melt index is 3g/10min) as a base material, adding peroxide 2, 5-dimethyl-2, 5-di (tert-butyl-peroxy) hexane (DHBP) for blending, and extruding and granulating by a double-screw extruder. The compounding ratio of 2822E to DHBP is 98.8: 1.2, the extrusion temperature of the screw extruder is 220 ℃, the rotating speed is 320rpm, and an underwater granulator is used for granulating.
The component (B) is syndiotactic polypropylene, the syndiotactic polypropylene is homopolymerized polypropylene which is prepared between high isotactic polypropylene and atactic polypropylene based on a metallocene catalysis technology, the fluidity is good, the processing is easy, the melting point is low, the processing temperature is lower, the flexibility is high, the crystallinity is low, the odor is good, and the component has the function of reducing the integral spinning odor of the homopolymerized polypropylene composition.
In this embodiment, a syndiotactic polypropylene S400 with a trade name of L-MODU polypropylene is used, the melt index is 2600g/10min, the viscosity-age coefficient (190 ℃) is 8500, the melting point Tm 80 ℃, the softening point Ts 93 ℃, and | Tm-Ts | < 20 ℃.
The component (C) is a self-made long-acting electret master batch, the main components of which comprise tourmaline powder, rare earth permanent magnet material neodymium iron boron Nd2Fe14B powder and linear low-density LLDPE, and the ratio of the ingredients is 20:5: 75.
Feeding LLDPE main feed, mixing tourmaline powder and Nd2Fe14B powder, feeding into a screw extruder through side feed, extruding at 130 ℃ and 400rpm, and granulating.
In this example, the homopolypropylene composition had a composition ratio of 80:19.5:0.5 in order, and meltblown fibers produced by a Reicofil single-end meltblown line from Reifenhauser, Germany, had an average fiber diameter of about 2.3 μm, as shown in FIG. 1. The X-ray diffraction pattern of the crystal has only 2 obvious diffraction peaks, the peak shape is not sharp, and a platform appears, the unit cell structure represented by the crystal mainly is a quasi-hexagonal crystal structure and 2 variants of an alpha crystal form, wherein the crystal variant is dominant, as shown in figure 2 (A).
The gram weight of the produced melt-blown cloth is 50GSM, the filtration efficiency value measured by adopting an 8130 filtration efficiency tester is 99%, and the filtration resistance is 45Pa, so that the melt-blown cloth can be used for producing medical N95 masks.
And testing the surface potential of the melt-blown fabric by using an electrostatic ball, wherein the included angle of the metal sheet is in positive correlation with the surface potential. The sheet metal angle was used to characterize the electrostatic potential decay law as shown in the following table. Wherein, #1 is a melt-blown fabric sample with 0.5% of component C added thereto, #2 is a melt-blown fabric sample without component C added thereto and with 3% of domestic electrostatic electret master batch added thereto, the electrostatic electret parameters are consistent, and the test samples are all placed in a sealed box. It can be easily found that after 180 days, the surface potential of the sample # 1 is attenuated by 5.8%, the surface potential of the sample # 2 is attenuated by 89.3%, and the initial electret effect of the domestic electrostatic electret master batch is weaker than that of the home-made electrostatic electret master batch.
TABLE 1 Electrostatic potential test chart
Example 2
The polypropylene composition according to the present invention comprises a low molecular weight homo-polypropylene as component (A), a syndiotactic polypropylene as component (B) and a long-acting electrostatic electret as component (C).
In the embodiment, the homo-polypropylene of component (A) is visbroken and degraded, the molecular weight distribution is 2.36 (as shown in figure 4), the ash content and impurity content is 150 polypropylene m, the DTBP residual quantity is less than 2.5mg/kg, the melt index is about 1450 +/-50 g/10min, and the end use is medical protective clothing.
The preparation mechanism of the homopolymerized polypropylene is as follows: visbreaking a low melting homo-polypropylene base under more controlled conditions using heat and peroxide, where peroxide dominates and the molar mass distribution (MWD) is narrowed.
The polypropylene is obtained by using conventional homopolymerized polypropylene (Y2600, Shanghai petrochemical, melt index is 26g/10min) as a base material, adding a part of powder (polypropylene 225, hong Kogyi petrochemical, melt index is 25g/10min) and peroxide bis (tert-butylperoxy-isopropyl) benzene (DI polypropylene) for blending, and extruding and granulating by a double-screw extruder. The compounding ratio of Y2600, polypropylene 225 and DI polypropylene is 90: and 9.3:0.7, mixing the DI polypropylene and the polypropylene 225 powder in proportion, adding the mixture into the base material to facilitate dispersion, wherein the extrusion temperature of the screw extruder is 230 ℃, the rotation speed is 320rpm, and the mixture is granulated by an underwater granulator.
The component (B) is syndiotactic polypropylene, the syndiotactic polypropylene is homopolymerized polypropylene which is prepared between high isotactic polypropylene and atactic polypropylene based on a metallocene catalysis technology, the fluidity is good, the processing is easy, the melting point is low, the processing temperature is lower, the flexibility is high, the crystallinity is low, the odor is good, and the component has the function of reducing the integral spinning odor of the homopolymerized polypropylene composition.
In this embodiment, a syndiotactic polypropylene S600 with a trade name of L-MODU polypropylene is used, the melt index is 360g/10min, the viscosity coefficient (190 deg.C) is 50000, the melting point is 80 deg.C, the softening point is 100 deg.C, and | Tm-Ts | is less than or equal to 20 deg.C.
The component (C) is a self-made long-acting electret master batch, the main components of which comprise tourmaline powder, rare earth permanent magnet material neodymium iron boron Nd2Fe14B powder and linear low-density LLDPE, and the proportion is 1:0.25: 98.75.
Feeding LLDPE main feed, mixing tourmaline powder and Nd2Fe14B powder, feeding into a screw extruder through side feed, extruding at 130 ℃ and 350rpm, and granulating.
In this example, the homopolypropylene composition had a composition ratio of A: B: C of 85:5:10 in this order, and meltblown fibers produced by Reicofil off-line SMS production line of Reifenhauser, Germany, had an average fiber diameter of about 2.7 μm, and had a soft hand feeling in meltblown due to the large amount of LLDPE added.
The produced melt-blown fabric has the gram weight of 60GSM, is compounded with spun-bonded fabric on line into an SMS material, has the flexible characteristic, can be used for producing medical protective clothing, and greatly improves the wearing comfort.
Claims (10)
1. A low odor, long lasting electret effect polypropylene homopolymer for melt blown fibers characterized by: the long-acting electrostatic electret polypropylene composition comprises (A) homopolymerized polypropylene, (B) syndiotactic polypropylene and (C) long-acting electrostatic electret components, wherein the mass ratio of the components is 80-90%: 10% -2%: 0.5% -3%, the polypropylene composition has i) a melt flow rate MFR (230 ℃/2.16kg) of 100-2000 g/10min measured according to ISO 1133, ii) a long-acting electrostatic electret effect and iii) good spinning smell.
2. A low odor, long lasting electret effect polypropylene homopolymer for meltblown fibers according to claim 1 wherein: the homopolymerized polypropylene of the component (A) is as follows: i) molecular weight distribution < 3, ii) ash and impurity content < 150 polypropylene m, iii) residual DTBP content < 5 mg/kg.
3. A low odor, long lasting electret effect polypropylene homopolymer for meltblown fibers according to claim 1 wherein: the syndiotactic polypropylene as the component (B) is: i) the melting point Tm is between 60 and 100 ℃, and the difference between the softening point Ts and the Tm | Ts-Tm | is less than or equal to 20 ℃; iii) high flowability, melt flow rate MFR (230 ℃/2.16kg) measured according to ISO 1133 of 900 to 2000g/10min, iv) viscosity coefficient in the range 8500-.
4. A low odor, long lasting electret effect polypropylene homopolymer for meltblown fibers according to claim 1 wherein: the component (C) is a long-acting static electret component: i) ash and impurity content less than 100 polypropylene m, ii) fast electret ability in high voltage electrostatic field; iii) contains a permanent magnetic substance.
5. A low odor, long lasting electret effect polypropylene homopolymer for meltblown fibers according to claim 4 wherein: the main body of the long-acting electrostatic electret component can be organic or inorganic electron-deficient body, such as NH4 +，N3+Etc., also can be tourmaline powder; the permanent magnetic substance may be an organic or inorganic metal complex containing Fe, Ni, Nd, etc.
6. A low odor, long lasting electret effect polypropylene homopolymer for meltblown fibers according to claim 4 wherein: the long-acting electrostatic electret component can be in the form of particles, powder or microbeads, and the carrier can be linear low-density polyethylene or high-melting homo-polypropylene with the melting index of more than 500.
7. A low odor, long lasting electret effect polypropylene homopolymer for meltblown fibers according to claim 1 wherein: the prepared melt-blown fiber or melt-blown non-woven fabric comprises the following components: i) the diameter of the fiber is 1-4 μm or the gram weight of the melt-blown fabric is 20-60 GSM; ii) after the electrostatic field is electret by high voltage, the half life of charge dissipation is not less than 180 days.
8. A low odor, long lasting electret effect polypropylene homopolymer for meltblown fibers according to claim 7 wherein: the melt-blown fiber is a permanent magnet, two magnetized stages are arranged at two ends of the fiber, and the fiber is provided with a microelectronic loop.
9. A low odor, long lasting electret effect polypropylene homopolymer for meltblown fibers according to claim 7 wherein: the melt-blown fiber or the melt-blown cloth has the self-charging characteristic, and the action mechanism of the melt-blown fiber or the melt-blown cloth is that when the permanent magnet fiber performs cutting geomagnetic field motion, the induced charge moves directionally and a microelectronic loop in the fiber is formed.
10. A low odor, long lasting electret effect polypropylene homopolymer for meltblown fibers according to claim 1 wherein: can be used for preparing mask, protective clothing, surgical gown, gas/liquid filter medium, sanitary napkin, and diaper.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112300486A (en) * | 2020-09-30 | 2021-02-02 | 浙江太湖远大新材料股份有限公司 | Low-odor high-fluidity polypropylene with long electret efficiency |
| 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 |
| CN112746391A (en) * | 2020-12-29 | 2021-05-04 | 晋江恒安家庭生活用纸有限公司 | Self-charging self-cleaning melt-blown non-woven fabric and mask |
| CN112813515A (en) * | 2021-02-03 | 2021-05-18 | 绍兴瑞康生物科技有限公司 | Efficient electret containing organic metal complex and application thereof |
| WO2022157319A1 (en) * | 2021-01-21 | 2022-07-28 | Borealis Ag | Electret melt-blown webs with improved filtration properties |
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| 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 |
| CN112662061B (en) * | 2020-12-18 | 2022-12-06 | 广东金发科技有限公司 | Low-shrinkage modified polypropylene resin and preparation method and application 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 |
| CN112746391A (en) * | 2020-12-29 | 2021-05-04 | 晋江恒安家庭生活用纸有限公司 | Self-charging self-cleaning melt-blown non-woven fabric and mask |
| WO2022157319A1 (en) * | 2021-01-21 | 2022-07-28 | Borealis Ag | Electret melt-blown webs with improved filtration properties |
| CN112813515A (en) * | 2021-02-03 | 2021-05-18 | 绍兴瑞康生物科技有限公司 | Efficient electret containing organic metal complex and application thereof |
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Application publication date: 20200818 |