CN110499586B - Electrostatic cotton material and preparation method and application thereof - Google Patents
Electrostatic cotton material and preparation method and application thereof Download PDFInfo
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- CN110499586B CN110499586B CN201910753236.5A CN201910753236A CN110499586B CN 110499586 B CN110499586 B CN 110499586B CN 201910753236 A CN201910753236 A CN 201910753236A CN 110499586 B CN110499586 B CN 110499586B
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- 239000000463 material Substances 0.000 title claims abstract description 86
- 229920000742 Cotton Polymers 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 49
- 239000000155 melt Substances 0.000 claims abstract description 38
- 239000002131 composite material Substances 0.000 claims abstract description 35
- 239000003063 flame retardant Substances 0.000 claims abstract description 28
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims description 23
- 238000009987 spinning Methods 0.000 claims description 22
- 238000002844 melting Methods 0.000 claims description 20
- 230000008018 melting Effects 0.000 claims description 20
- 229920000728 polyester Polymers 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 16
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000004745 nonwoven fabric Substances 0.000 claims description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 239000011574 phosphorus Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 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 description 4
- 238000007596 consolidation process Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000004927 fusion Effects 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 239000000356 contaminant Substances 0.000 claims 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000004744 fabric Substances 0.000 abstract description 10
- 239000000428 dust Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 description 29
- 238000001035 drying Methods 0.000 description 15
- 238000005520 cutting process Methods 0.000 description 12
- 238000004804 winding Methods 0.000 description 12
- 239000004743 Polypropylene Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- -1 polypropylene Polymers 0.000 description 7
- 229920001155 polypropylene Polymers 0.000 description 7
- 238000007602 hot air drying Methods 0.000 description 6
- 229920000098 polyolefin Polymers 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000004750 melt-blown nonwoven Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- 208000002193 Pain Diseases 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 208000024764 elbow pain Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 238000011045 prefiltration Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- 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
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- 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
- D01D5/12—Stretch-spinning methods
-
- 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
- D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
-
- 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
- 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
-
- 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
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
-
- 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
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
- D04H3/147—Composite yarns or filaments
-
- 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
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0216—Bicomponent or multicomponent fibres
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
An electrostatic cotton material and a preparation method and application thereof, wherein the electrostatic cotton material is composed of bicomponent composite filaments, the bicomponent composite filaments are in a parallel structure, and the melt index of the A component material is 34g/10 min-42 g/10 min; the intrinsic viscosity of the material of the component B is 0.60dl/g to 0.69dl/g, and the oxygen index exceeds 28.0 percent. The production process is completely environment-friendly, the filtering efficiency of the high-temperature environment is reduced when the material is used, the material has the cloth cover style of the aesthetic feeling of bright filaments and low odor, and has a flame retardant effect, so that the material is a high dust-containing material in the field of building fresh air systems or vehicle air filtration application.
Description
Technical Field
The invention relates to a non-woven fabric material, in particular to an electrostatic cotton material.
Background
With the deep promotion of the country to air pollution control and the pursuit of residents to higher-quality life, the terminal application fields of homes, passenger cars and the like pay more attention to air quality maintenance. The building fresh air system is an inevitable choice for the development of building science and technology, the building energy is saved, the fresh air system cannot be left, residents are healthy, and the uneven fresh air market is expected to develop more after being subjected to deep shuffling. The market reservation of passenger automobiles is rising year by year and driven by the consumption of the automobiles, and the market demand of the automobile air-conditioning filter element is always in a high-level state. The vigorous demands of fresh air and automobile air filter can promote the technology of the filter material needed by the relevant filter element to be updated rapidly. The existing fresh air or vehicle air filter material is mostly compounded by a framework support material, columnar/granular activated carbon and melt-blown non-woven fabric or short-fiber electrostatic cotton; in order to prolong the service life of the filter element and improve the dust holding capacity of the filter material, the filter material becomes the most effective solution way, and the fluffy electrostatic cotton is more favored than the melt-blown non-woven fabric.
Although the short fiber electrostatic cotton in the composite filter material has a very mature and complete manufacturing technology and extremely high market recognition,
but has the following long-standing unsolved defects and pain points:
1. the short fiber electrostatic cotton is mainly formed by blending polyester short fibers and electrostatic functional short fibers and then needling and reinforcing, the needle marks and holes on the cloth surface are obvious, and the filtering efficiency of the electrostatic cotton is reduced;
2. the electrostatic property of the short fiber electrostatic cotton mainly comes from electrostatic functional short fibers, the manufacturing process is long, the electrostatic attenuation in a high-temperature environment is obvious, and the high-temperature processing working conditions of the processes of filter material compounding, filter material pleating and the like in the subsequent process cannot be adapted;
3. short-fiber electrostatic cotton fibers are disorderly arranged and oriented, the appearance and color of the formed fabric are darker, unstable appearances such as fluffing and the like are easy to appear in needling consolidation, and the style and the aesthetic feeling of the fabric are poorer;
if the short-fiber electrostatic cotton meets the flame-retardant requirement of the interior trim material of a passenger car, a flame-retardant functional auxiliary agent with strong smell needs to be coated or impregnated, and then the tentering and drying process is carried out, so that the process is difficult, the color is easy to change, the durability is poor, more importantly, the production process has strong smell in the processing process and needs to be matched with a special waste gas recovery processing system, and the expected value within 3 levels in the VDA270 standard of the odor test of the interior trim material of the car cannot be met after the product is manufactured.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention aims to provide an electrostatic cotton material, a preparation method and a use thereof, wherein the electrostatic cotton material has a completely environment-friendly production process, a reduced filtration efficiency in a high temperature environment during use, a bright filament aesthetic appearance cloth cover style, a low odor and a flame retardant effect, is used for a high dust-containing material in a building fresh air system or a vehicle air filtration application field, and is used for solving the problems in the prior art.
To achieve the above objects and other related objects, the present invention is achieved by the following technical solutions.
The invention provides an electrostatic cotton material which is composed of two-component composite filaments, wherein the two components are in a parallel structure in the composite filaments, and the melt index of the component A material is 34g/10 min-42 g/10 min; the intrinsic viscosity of the material of the component B is 0.60dl/g to 0.69dl/g, and the oxygen index exceeds 28.0 percent.
The melt index in this application was obtained using GBT3682, tested at 230 ℃ and 2.16 kg.
Intrinsic viscosity in this application was measured using GBT14190 at 25 ℃.
Preferably, the component A accounts for 40-60 wt% of the total mass of the bicomponent composite filament.
Preferably, the melting point of the component A material is 158 ℃ to 168 ℃.
Preferably, the melting point of the B component material is 235-255 ℃.
More preferably, the a component material is selected from one or more of homopolyolefins. More preferably, the homopolyolefin is homopolypropylene.
More preferably, the A component material contains 1 wt% -3 wt% of electret master batch based on the total mass of the A component material.
More preferably, the total mass of the electret master batch in the component A material is taken as a reference, the electret master batch contains 5-10 wt% of nano kieselguhr and 8-15 wt% of nano talcum powder, and the balance is homopolymerized polypropylene.
More preferably, the B component material is selected from one or more of flame retardant modified polyesters. More preferably, the polyester is PET.
More preferably, the B component material contains 20-50 wt% of flame retardant based on the total mass of the B component material.
More preferably, the flame retardant is selected from one or more of phosphorus-based flame retardants. Namely, the component B material is polyester blended and modified by a phosphorus flame retardant.
The invention also discloses a preparation method of the electrostatic cotton material, which comprises the following steps:
1) stirring the raw material of the component A, adding the raw material of the component A into a single screw extruder, adding the raw material of the component B into another single screw extruder, melting and extruding the raw material of the component B, and then feeding the raw material of the component B into a composite spinning assembly to form continuous composite filament fibers with parallel structures;
2) cooling by cross air blowing, and forming a net after positive pressure drafting by drafting air;
3) the non-woven fabric after the net formation enters a rotary screen hot air bellow for fusion and consolidation;
4) and (3) passing the non-woven fabric solidified by the hot air of the rotary screen through a corona electret machine for high-voltage discharge electret.
Preferably, the blend of the raw materials of component A does not require drying before being melted in the single screw extruder.
Preferably, the raw materials of the component B are dried before being melted in a single-screw extruder so that the moisture content thereof does not exceed 800 ppm. More preferably, the temperature of the drying process does not exceed 165 ℃.
Preferably, the temperatures of all the zones of the single-screw extruder through which the component A passes are as follows in sequence: 190-200 ℃, 200-210 ℃, 225-235 ℃, 220-230 ℃.
Preferably, the raw material of the component A passes through a single-screw extruder to form a melt, the melt enters a filter for filtration after passing through a booster pump and then enters a metering pump for metering, and a quantitative melt enters a composite spinning assembly. More preferably, the pressure before filtration of the filter is 8-15 MPa, and the pressure after filtration is 5-8 MPa.
Preferably, the temperature of each zone of the single-screw extruder through which the raw material of the component B passes is 275-280 ℃, 280-283 ℃, 283-287 ℃ and 280-288 ℃ in sequence.
Preferably, the raw materials of the component B form a melt after passing through a single-screw extruder, the melt enters a filter for filtration and then enters a metering pump for metering, and a quantitative melt enters a composite spinning assembly. More preferably, the pressure before filtration of the filter is 8-15 MPa, and the pressure after filtration is 5-8 MPa.
Preferably, in the step 2), the temperature of the cross air blow is 9-20 ℃.
Preferably, in the step 2), the pressure of the drafting wind is 0.10-0.24 MPa.
Preferably, in the step 2), the drafting height is 0.7-1.6 m.
Preferably, in the step 3), the temperature of the hot air is 155-175 ℃.
And 3) melting the component A of the composite filaments in the parallel structure after the hot air treatment, and mutually bonding and consolidating the component A.
Preferably, in the step 4), the corona electret voltage is 35-50 kv.
Preferably, in the step 4), the corona electret distance is 6-12 cm.
And 4) performing corona electret treatment, and allowing the nano-scale diatomite and the nano-scale talcum powder to retain charges to form electrostatic adsorption coulombic force.
The invention also discloses the application of the electrostatic cotton material as a dust holding material of particle pollutants in the field of air filtration.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the electrostatic property of the product is provided by inorganic electret materials, namely nano-scale diatomite and nano-scale talcum powder, the charge retention capacity is strong after corona electret, the electrostatic attenuation is reduced in a high-temperature environment, and the product can adapt to high-temperature working conditions such as subsequent compounding, pleating and the like;
2. the product of the invention is completely produced by environment-friendly high molecular polymer and nontoxic inorganic matters, and the material does not contain or release any toxic substances;
3. the product is easy to rebound after being pleated and processed due to the self property of the filament fiber, and the filter element can not generate larger bad deformation after being assembled and disassembled after being applied to the vehicle air conditioner filter element;
4. the product is formed into cloth by a one-step method by the curled self-bright filament fibers, does not need needling solidification and needle mark, is bonded and solidified by hot air, is not easy to generate poor appearance such as fluffing and the like in the preparation process, and has attractive cloth cover style and better selling phase;
5. the flame retardant property of the product is provided by an environment-friendly modified high polymer material, and the product produced, used and recycled does not generate toxic substances in the whole life cycle, completely meets the requirement of environmental protection, and is obviously superior to similar short fiber products in the evaluation of the odor of automobile interior materials.
6. When the product is used as a high-dust-holding material of a filter element of a vehicle or a fresh air system, the material has the properties of weak smell, high air permeability, high filtration efficiency, low filtration resistance, flame retardance, small high-temperature filtration efficiency attenuation and the like, does not have needle prick marks, and has the aesthetic feeling of a double-component composite continuous filament fabric with self-bright light.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Before the present embodiments are further described, it is to be understood that the scope of the invention is not limited to the particular embodiments described below; it is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.
When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any value therebetween can be selected unless the invention otherwise indicated. 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. In addition to the specific methods, devices, and materials used in the examples, any methods, devices, and materials similar or equivalent to those described in the examples may be used in the practice of the invention in addition to the specific methods, devices, and materials used in the examples, in keeping with the knowledge of one skilled in the art and with the description of the invention.
Example 1
The production of the embodiment of the invention mainly comprises the following steps:
the component A polymer is homopolymerized polypropylene, and the melting point is 158-168 ℃;
the B component polymer is a polyester slice subjected to phosphorus flame retardant modification treatment, the melting point is 235-255 ℃, and the oxygen index is more than 28%.
The two components are matched in proportion A: b45: 55 (mass ratio)
The two polymers are respectively polyolefin and polyester, the former needs no material drying and is directly melt extruded by a single screw extruder, and the latter needs material drying treatment at 155 ℃ for 9 hours and is melt extruded by the single screw extruder.
Melting raw materials (containing 1.5 wt% of electret master batch) of the component A through a single-screw extruder, wherein the temperature zone is set as follows: 195 deg.C, 205 deg.C, 230 deg.C, 225 deg.C, melt temperature 225 deg.C, and screw line temperature 230 deg.C; the melt of the component A is filtered by a filter, the pressure before filtering is 12.5MPa, the pressure after filtering is 6.5MPa, then the melt enters a metering pump for metering, the rotating speed of the metering pump is 20rpm, and the quantitative melt enters a composite spinning assembly.
The component B polymer (flame retardant) is melted by a single screw extruder, and the temperature zone is set as follows: 280 ℃, 282 ℃, 285 ℃, 282 ℃, 284 ℃ of melt temperature, 285 ℃ of screw pipeline temperature, filtering the melt of the component B by a filter, wherein the pressure before filtering is 11.5MPa, and the pressure after filtering is 6.5MPa, then metering the melt by a metering pump, rotating speed of the metering pump is 15rpm, and feeding the quantitative melt into a composite spinning component.
The temperature of a closed box body for distributing the melt in the composite spinning assembly is kept at 285 ℃; the temperature of cooling air blown oppositely at two sides of the extruded filaments of the spinneret orifice is 11 ℃, the relative humidity is 60 percent, and the air quantity is 1050 rpm; the air flow drafting wind pressure is 0.14MPa, and the drafting height is 1.2 m; the web forming speed is 27.0 m/min; the net forming machine has the main air suction rate of 1000rpm and the auxiliary air suction rate of 500 rpm; pre-pressing is not needed; the hot air of the cylinder hot air drying chamber is set as follows: the blowing frequency was 40Hz, and the air temperature was 166 ℃. After being discharged, the rotary screen hot air equipment directly enters a high-voltage corona electret machine, wherein the electret voltage is 50kv, and the electret distance is 10 cm; winding the non-woven fabric subjected to corona electret into a roll by a winding machine, cutting the roll by a cutting machine, wherein the maximum width of the cut roll is 1.6m, and the gram weight of the product is 85g/m2。
Example 2
The production of the embodiment of the invention mainly comprises the following steps:
the component A polymer is homopolymerized polypropylene, and the melting point is 158-168 ℃;
the component B polymer is a polyester slice which is subjected to phosphorus flame retardant modification treatment, the melting point is 235-255 ℃, and the oxygen index is more than 28%.
The matching proportion of the two components in parallel A: b41: 59 (mass ratio)
The two polymers are respectively polyolefin polymer and polyester polymer, the former polymer is directly melted and extruded by a single screw extruder without drying materials, and the latter polymer is melted and extruded by the single screw extruder after being treated by drying materials at 155 ℃ for 9 hours.
The raw material of the component A (containing 1.5 percent of electret master batch) is melted by a single screw extruder, and the temperature zone is set as follows: 195 deg.C, 205 deg.C, 230 deg.C, 225 deg.C, melt temperature 225 deg.C, and screw line temperature 230 deg.C; the melt of the component A is filtered by a filter, the pressure before filtering is 11.5MPa, the pressure after filtering is 6.5MPa, then the melt enters a metering pump for metering, the rotating speed of the metering pump is 18rpm, and the quantitative melt enters a composite spinning assembly.
The component B polymer (flame retardant) is melted by a single screw extruder, and the temperature zone is set as follows: 280 ℃, 282 ℃, 285 ℃, 282 ℃, 284 ℃ of melt temperature, 285 ℃ of screw pipeline temperature, 12.0MPa of pre-filtration pressure and 6.5MPa of post-filtration pressure of the melt of the component B filtered by a filter, then the melt enters a metering pump for metering, the rotating speed of the metering pump is 16rpm, and the quantitative melt enters a composite spinning component.
The temperature of a closed box body for distributing the melt in the composite spinning assembly is kept at 285 ℃; the temperature of cooling air blown oppositely at two sides of the extruded filaments of the spinneret orifice is 11 ℃, the relative humidity is 60 percent, and the air quantity is 1050 rpm; the air flow drafting wind pressure is 0.14MPa, and the drafting height is 1.1 m; the net forming speed is 26.8 m/min; the net forming machine has the main air suction rate of 1000rpm and the auxiliary air suction rate of 500 rpm; pre-pressing roller rolling is not needed; the hot air of the cylinder hot air drying chamber is set as follows: the blowing frequency was 40Hz, and the air temperature was 166 ℃. After being discharged, the rotary screen hot air equipment directly enters a high-voltage corona electret machine, wherein the electret voltage is 50kv, and the electret distance is 10 cm; winding the non-woven fabric subjected to corona electret into a roll by a winding machine, cutting the roll by a cutting machine, wherein the maximum width of the cut roll is 1.6m, and the gram weight of the product is 85g/m2。
Example 3
The production of the embodiment of the invention mainly comprises the following steps:
the component A polymer is homopolymerized polypropylene, and the melting point is 158-168 ℃;
the component B polymer is a polyester slice which is subjected to phosphorus flame retardant modification treatment, the melting point is 235-255 ℃, and the oxygen index is more than 28%.
The two components are matched in proportion A: b48: 52 (mass ratio)
The two polymers are respectively polyolefin and polyester, the former needs no material drying and is directly melt extruded by a single screw extruder, and the latter needs material drying treatment at 155 ℃ for 9 hours and is melt extruded by the single screw extruder.
The raw material of the component A (containing 1.5 percent of electret master batch) is melted by a single screw extruder, and the temperature zone is set as follows: 195 ℃, 205 ℃, 230 ℃, 225 ℃ of melt temperature, 230 ℃ of screw line temperature; the melt of the component A is filtered by a filter, the pressure before filtering is 13.0MPa, the pressure after filtering is 6.5MPa, then the melt enters a metering pump for metering, the rotating speed of the metering pump is 21rpm, and the quantitative melt enters a composite spinning assembly.
The component B polymer (flame retardant) is melted by a single screw extruder, and the temperature zone is set as follows: 280 ℃, 282 ℃, 285 ℃, 282 ℃, 284 ℃ of melt temperature, 285 ℃ of screw pipeline temperature, filtering the melt of the component B by a filter, wherein the pressure before filtering is 11.0MPa, and the pressure after filtering is 6.5MPa, then metering the melt by a metering pump, rotating speed of the metering pump is 14rpm, and feeding the quantitative melt into a composite spinning component.
The temperature of a closed box body for distributing the melt in the composite spinning assembly is kept at 285 ℃; the temperature of cooling air blown oppositely at two sides of the extruded filaments of the spinneret orifices is 10 ℃, the relative humidity is 60 percent, and the air quantity is 1050 rpm; the air flow drafting wind pressure is 0.14MPa, and the drafting height is 1.4 m; the web forming speed is 26.6 m/min; the net forming machine has the main air suction rate of 1000rpm and the auxiliary air suction rate of 500 rpm; pre-pressing roller rolling is not needed; the hot air of the cylinder hot air drying chamber is set as follows: the blowing frequency was 40Hz, and the air temperature was 166 ℃. After being discharged, the rotary screen hot air equipment directly enters a high-voltage corona electret machine, wherein the electret voltage is 50kv, and the electret distance is 10 cm; winding the non-woven fabric subjected to corona electret into a roll by a winding machine, cutting the roll by a cutting machine, wherein the maximum width of the cut roll is 1.6m, and the gram weight of the product is 85g/m2。
Example 4
The production of the embodiment of the invention mainly comprises the following steps:
the component A polymer is homopolymerized polypropylene, and the melting point is 158-168 ℃;
the B component polymer is a polyester slice subjected to phosphorus flame retardant modification treatment, the melting point is 235-255 ℃, and the oxygen index is more than 28%.
The two components are matched in proportion A: b48: 52 (mass ratio)
The two polymers are respectively polyolefin and polyester, the former needs no material drying and is directly melt extruded by a single screw extruder, and the latter needs material drying treatment at 155 ℃ for 9 hours and is melt extruded by the single screw extruder.
The raw material of the component A (containing 1.5 percent of electret master batch) is melted by a single screw extruder, and the temperature zone is set as follows: 195 deg.C, 205 deg.C, 230 deg.C, 225 deg.C, melt temperature 225 deg.C, and screw line temperature 230 deg.C; the melt of the component A is filtered by a filter, the pressure before filtering is 13.0MPa, the pressure after filtering is 6.5MPa, then the melt enters a metering pump for metering, the rotating speed of the metering pump is 21rpm, and the quantitative melt enters a composite spinning assembly.
The component B polymer (flame retardant) is melted by a single screw extruder, and the temperature zone is set as follows: 280 ℃, 282 ℃, 285 ℃, 282 ℃, 284 ℃ of melt temperature, 285 ℃ of screw pipeline temperature, filtering the melt of the component B by a filter, wherein the pressure before filtering is 11.0MPa, and the pressure after filtering is 6.5MPa, then metering the melt by a metering pump, rotating speed of the metering pump is 14rpm, and feeding the quantitative melt into a composite spinning component.
The temperature of a closed box body for distributing the melt in the composite spinning assembly is kept at 285 ℃; the temperature of cooling air blown oppositely at two sides of the extruded filaments of the spinneret orifices is 10 ℃, the relative humidity is 60 percent, and the air quantity is 1050 rpm; the air flow drafting wind pressure is 0.14MPa, and the drafting height is 1.4 m; the web forming speed is 34.8 m/min; the net forming machine has the main air suction rate of 1000rpm and the auxiliary air suction rate of 500 rpm; pre-pressing roller rolling is not needed; the hot air of the cylinder hot air drying chamber is set as follows: the blowing frequency was 40Hz, and the air temperature was 166 ℃. After being discharged, the rotary screen hot air equipment directly enters a high-voltage corona electret machine, wherein the electret voltage is 50kv, and the electret distance is 10 cm; winding the non-woven fabric subjected to corona electret into a roll by a winding machine, cutting the roll by a cutting machine, wherein the maximum width of the cut roll is 1.6m, and the gram weight of the product is 65g/m2。
Example 5
The production of the embodiment of the invention mainly comprises the following steps:
the component A polymer is homopolymerized polypropylene, and the melting point is 158-168 ℃;
the component B polymer is a polyester slice which is subjected to phosphorus flame retardant modification treatment, the melting point is 235-255 ℃, and the oxygen index is more than 28%.
The two components are matched in proportion A: b48: 52 (mass ratio)
The two polymers are respectively polyolefin and polyester, the former needs no material drying and is directly melt extruded by a single screw extruder, and the latter needs material drying treatment at 155 ℃ for 9 hours and is melt extruded by the single screw extruder.
The raw material of the component A (containing 1.5 percent of electret master batch) is melted by a single screw extruder, and the temperature zone is set as follows: 195 deg.C, 205 deg.C, 230 deg.C, 225 deg.C, melt temperature 225 deg.C, and screw line temperature 230 deg.C; the melt of the component A is filtered by a filter, the pressure before filtering is 13.0MPa, the pressure after filtering is 6.5MPa, then the melt enters a metering pump for metering, the rotating speed of the metering pump is 21rpm, and the quantitative melt enters a composite spinning assembly.
The component B polymer (flame retardant) is melted by a single screw extruder, and the temperature zone is set as follows: 280 ℃, 282 ℃, 285 ℃, 282 ℃, 284 ℃ of melt temperature, 285 ℃ of screw pipeline temperature, filtering the melt of the component B by a filter, wherein the pressure before filtering is 11.0MPa, and the pressure after filtering is 6.5MPa, then metering the melt by a metering pump, rotating speed of the metering pump is 14rpm, and feeding the quantitative melt into a composite spinning component.
The temperature of a closed box body for distributing the melt in the composite spinning assembly is kept at 285 ℃; the temperature of cooling air blown oppositely at two sides of the extruded filaments of the spinneret orifices is 10 ℃, the relative humidity is 60 percent, and the air quantity is 1050 rpm; the air flow drafting wind pressure is 0.20MPa, and the drafting height is 1.4 m; the web forming speed is 26.6 m/min; the net forming machine has the main air suction rate of 1000rpm and the auxiliary air suction rate of 500 rpm; pre-pressing roller rolling is not needed; the hot air of the cylinder hot air drying chamber is set as follows: the blowing frequency was 40Hz, and the air temperature was 166 ℃. After being discharged, the rotary screen hot air equipment directly enters a high-voltage corona electret machine, wherein the electret voltage is 50kv, and the electret distance is 10 cm; winding the non-woven fabric subjected to corona electret into a roll by a winding machine, cutting the roll by a cutting machine, wherein the maximum width of the cut roll is 1.6m, and the gram weight of the product is 85g/m2。
Example 6
The production of the embodiment of the invention mainly comprises the following steps:
the component A polymer is homopolymerized polypropylene, and the melting point is 158-168 ℃;
the component B polymer is a polyester slice which is subjected to phosphorus flame retardant modification treatment, the melting point is 235-255 ℃, and the oxygen index is more than 28%.
The two components are matched in proportion A: b51: 49 (mass ratio)
The two polymers are respectively polyolefin and polyester, the former needs no material drying and is directly melt extruded by a single screw extruder, and the latter needs material drying treatment at 155 ℃ for 9 hours and is melt extruded by the single screw extruder.
The raw material of the component A (containing 1.5 percent of electret master batch) is melted by a single screw extruder, and the temperature zone is set as follows: 195 deg.C, 205 deg.C, 230 deg.C, 225 deg.C, melt temperature 225 deg.C, and screw line temperature 230 deg.C; the melt of the component A is filtered by a filter, the pressure before filtering is 13.5MPa, the pressure after filtering is 6.5MPa, then the melt enters a metering pump for metering, the rotating speed of the metering pump is 22rpm, and the quantitative melt enters a composite spinning assembly.
The component B polymer (flame retardant) is melted by a single screw extruder, and the temperature zone is set as follows: 280 ℃, 282 ℃, 285 ℃, 282 ℃, 284 ℃ of melt temperature, 285 ℃ of screw pipeline temperature, filtering the melt of the component B by a filter, wherein the pressure before filtering is 10.5MPa, and the pressure after filtering is 6.5MPa, then metering the melt by a metering pump, rotating speed of the metering pump is 13rpm, and feeding the quantitative melt into a composite spinning component.
The temperature of a closed box body for distributing the melt in the composite spinning assembly is kept at 285 ℃; the temperature of cooling air blown oppositely at two sides of the extruded filaments of the spinneret orifices is 10 ℃, the relative humidity is 60 percent, and the air quantity is 1050 rpm; the air flow drafting wind pressure is 0.14MPa, and the drafting height is 1.4 m; the web forming speed is 26.2 m/min; the net forming machine has the main air suction rate of 1000rpm and the auxiliary air suction rate of 500 rpm; pre-pressing roller rolling is not needed; the hot air of the cylinder hot air drying chamber is set as follows: the blowing frequency was 40Hz, and the air temperature was 166 ℃. After being discharged, the rotary screen hot air equipment directly enters a high-voltage corona electret machine, wherein the electret voltage is 50kv, and the electret distance is 10 cm; winding the non-woven fabric subjected to corona electret into a roll by a winding machine, cutting the roll by a cutting machine, wherein the maximum width of the cut roll is 1.6m, and the gram weight of the product is 85g/m2。
Flame-retardant filament parallel fiber electrostatic cotton material obtained in applicationThe material is suitable for being applied to a filter element high dust holding material in the field of air filtration, and the gram weight of the material in application is generally 30-100 g/m2。
The main performance indexes of the corresponding products obtained in examples 1 to 6 are shown in table 1 below:
compared with the existing common flame-retardant short fiber electrostatic cotton in the market, the product in the example 3 is confirmed by actual tests to have various performance indexes such as the following table 2:
remarking: the sample treatment condition of the odor grade shown in the table 2 is 80 ℃/2 hours, and the odor release intensity of the sample after heat treatment is compared and confirmed.
② the high-temperature treatment condition in the item of the filtration efficiency after the high-temperature treatment in the above table 2 is 100 ℃/24H.
From the data shown in Table 2 above, it was confirmed that 85g/m of the present invention was obtained2The dust holding capacity of the product is moderate, the filtration resistance and the filtration efficiency attenuation in a high-temperature environment are obviously lower than those of common similar materials in the market, the key point is that the invention thoroughly solves the problem that the similar materials in the market are subjected to strong odor elbow pain points, and meanwhile, the material has the advantages of flame retardance, easy resilience, convenience for terminal customers to disassemble and assemble filter elements, no needle mark pinholes, attractive appearance of filaments with self-bright light and the like, and can provide an energy-saving, environment-friendly, comprehensive and high-quality technical solution for air filtering materials in building fresh air systems and automobile manufacturing industries.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. The electrostatic cotton material is characterized by comprising two-component composite filaments, wherein the two components are in a parallel structure in the composite filaments, the melt index of the component A material is 34g/10 min-42 g/10min, the melting point of the component A material is 158 ℃ to 168 ℃, and the component A material is selected from one or more of homopolymerized olefins; the intrinsic viscosity of the material of the component B is 0.60dl/g to 0.69dl/g, the oxygen index exceeds 28.0 percent, the melting point of the material of the component B is 235 ℃ to 255 ℃, and the material of the component B is selected from one or more of flame-retardant modified polyester;
based on the total mass of the material of the component A, the material of the component A contains 1 to 3 weight percent of electret master batch; based on the total mass of the electret master batch in the material of the component A, the electret master batch contains 5-10 wt% of nano kieselguhr and 8-15 wt% of nano talcum powder, and the balance is homopolymerized propylene;
the component A accounts for 40-60 wt% of the total mass of the bicomponent composite filament.
2. An electrostatic cotton material according to claim 1, wherein the B component material contains 20 to 50 wt% of the flame retardant, based on the total mass of the B component material.
3. An electrostatic cotton material according to claim 2, wherein the flame retardant is selected from one or more of phosphorus based flame retardants.
4. A method of producing an electrostatic cotton material according to any one of claims 1 to 3, comprising the steps of:
1) stirring the raw material of the component A, adding the raw material of the component A into a single screw extruder, adding the raw material of the component B into another single screw extruder, melting and extruding the raw material of the component B, and then feeding the raw material of the component B into a composite spinning assembly to form continuous composite filament fibers with parallel structures;
2) cooling by cross air blow, and forming a net after positive pressure drafting by drafting air;
3) the non-woven fabric after the net formation enters a cylinder hot air bellow for fusion and consolidation;
4) and (3) passing the non-woven fabric solidified by the circular screen hot air through a corona electret machine for high-voltage discharge electret.
5. The method of claim 4, comprising one or more of the following features:
the temperature of each zone of the single screw extruder for the raw material of the component A to pass through is as follows in sequence: 190-200 ℃, 200-210 ℃, 225-235 ℃, 220-230 ℃;
the temperature of each zone of the single screw extruder for the raw material of the component B to pass through is 275-280 ℃, 280-283 ℃, 283-287 ℃ and 280-288 ℃ in sequence.
6. The method of claim 4, comprising one or more of the following features:
the temperature of the cross air blow is 9-20 ℃;
the pressure of the drafting air is 0.10-0.24 MPa;
the draft height is 0.7 to 1.6 m.
7. The preparation method according to claim 4, wherein the temperature of the hot air in the step 3) is 155 to 175 ℃.
8. The method of claim 4, comprising one or more of the following features:
in the step 4), the corona electret voltage is 35-50 kv;
in the step 4), the corona electret distance is 6-12 cm.
9. Use of an electrostatic cotton material according to any of claims 1 to 3 as a dust-holding material for particulate contaminants in the field of air filtration.
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| JPH0568824A (en) * | 1991-09-13 | 1993-03-23 | Toray Ind Inc | Flame-retardant filter medium and its production |
| CN1059719C (en) * | 1998-09-07 | 2000-12-20 | 东华大学 | Preparation of composite porous hollow stereo crimped fiber with side-by-side bicomponent |
| CN100451204C (en) * | 2006-12-12 | 2009-01-14 | 天津泰达洁净材料有限公司 | Double component molten and jetted non-woven fabric and its making process |
| CN101387035B (en) * | 2007-09-10 | 2011-07-20 | 东丽纤维研究所（中国）有限公司 | Bi-component flame-retardant fibre fabric |
| US8021996B2 (en) * | 2008-12-23 | 2011-09-20 | Kimberly-Clark Worldwide, Inc. | Nonwoven web and filter media containing partially split multicomponent fibers |
| CN101591837A (en) * | 2009-07-08 | 2009-12-02 | 天津工业大学 | A kind of double-component melt-blown durable electret non-woven fabric and manufacture method thereof |
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