CN113417073A - Preparation method of flame-retardant antistatic filter material and filter material prepared by same - Google Patents
Preparation method of flame-retardant antistatic filter material and filter material prepared by same Download PDFInfo
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- CN113417073A CN113417073A CN202110855954.0A CN202110855954A CN113417073A CN 113417073 A CN113417073 A CN 113417073A CN 202110855954 A CN202110855954 A CN 202110855954A CN 113417073 A CN113417073 A CN 113417073A
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- polyphenylene sulfide
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 74
- 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 title claims abstract description 73
- 239000000463 material Substances 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims description 15
- 239000000835 fiber Substances 0.000 claims abstract description 233
- 239000010410 layer Substances 0.000 claims abstract description 88
- 239000004734 Polyphenylene sulfide Substances 0.000 claims abstract description 84
- 229920000069 polyphenylene sulfide Polymers 0.000 claims abstract description 84
- 239000004744 fabric Substances 0.000 claims abstract description 41
- 238000001914 filtration Methods 0.000 claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000002344 surface layer Substances 0.000 claims abstract description 29
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 26
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 23
- 239000004917 carbon fiber Substances 0.000 claims abstract description 22
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000009960 carding Methods 0.000 claims description 75
- 230000009471 action Effects 0.000 claims description 41
- 238000005096 rolling process Methods 0.000 claims description 35
- 238000002156 mixing Methods 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 11
- 238000009998 heat setting Methods 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- 238000009999 singeing Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000003490 calendering Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 2
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 2
- 150000003568 thioethers Chemical class 0.000 claims description 2
- 230000003068 static effect Effects 0.000 abstract description 11
- 239000000428 dust Substances 0.000 abstract description 10
- 238000009991 scouring Methods 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 abstract description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 38
- 238000012360 testing method Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 239000013618 particulate matter Substances 0.000 description 4
- 238000009841 combustion method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010892 electric spark Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000005087 graphitization Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000039 hydrogen halide Inorganic materials 0.000 description 1
- 239000012433 hydrogen halide Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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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
- D04H1/4374—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 using different kinds of webs, e.g. by layering webs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
- B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2055—Carbonaceous material
- B01D39/2065—Carbonaceous material the material being fibrous
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- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
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- 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
- D04H1/4209—Inorganic fibres
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- 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
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- 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
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- 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
- D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
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- 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
- D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/498—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
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- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
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- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C15/00—Calendering, pressing, ironing, glossing or glazing textile fabrics
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Abstract
According to the invention, the excellent flame retardant property and antistatic property of the PAN-based carbon fiber are utilized, and the PAN-based carbon short fiber is subjected to opening-mixing-fine opening-carding-layering to prepare a flame retardant-antistatic layer; the superfine polyphenylene sulfide fiber is made into a superfine filtering surface layer, so that the filtering precision is improved; then making the common polyphenylene sulfide fiber into a bottom layer; and finally, sequentially carrying out needling and post-finishing on the superfine fiber surface layer, the flame-retardant and antistatic layer, the base cloth layer and the bottom layer to finally prepare the flame-retardant and antistatic filtering material. The invention has the advantages that: PAN base carbon fiber can be in time with the charge transfer, need regard PAN base carbon fiber layer as the intermediate level of whole filtering material to there is the carbon fiber flying in filtering material use, lead to electrical components and parts failure in the filtration system. Thereby endowing the filter material with excellent antistatic property and performances of flame retardance, static resistance, dust scouring resistance, high filter precision and the like.
Description
Technical Field
The invention belongs to the field of chemical fiber materials, and particularly relates to a preparation method of a flame-retardant antistatic filter material and the filter material prepared by the same.
Background
In the field of industrial flue gas and dust treatment, dust particles in flue gas collide with each other and rub to form static charges, or the dust particles and a dust removal filter bag are washed and rubbed to form the static charges, so that the dust removal precision is reduced, and even the potential hazards of ignition and explosion can exist when flammable and explosive dust meets electric sparks at high temperature. Therefore, the flame-retardant antistatic filter material is designed, static charges on the surface of dust are eliminated in time, the flame retardant property of the filter material is improved, and the flame-retardant antistatic filter material has important significance for eliminating potential safety hazards of the working conditions.
Patent document with publication number CN102936760A discloses a flame-retardant polyacrylonitrile fiber and a preparation method thereof, belonging to the field of chemical fiber material preparation. The flame-retardant polyacrylonitrile fiber contains the following components: 40-55 wt% of industrial spinning grade polyacrylonitrile, 30-50 wt% of high-stereospecificity polyacrylonitrile and 5-25 wt% of phosphorus-containing flame retardant; the high-stereospecific polyacrylonitrile is synthesized in situ into the industrial spinning-grade polyacrylonitrile, and the high-stereospecific polyacrylonitrile and the phosphorus-containing flame retardant are both present in the formed flame-retardant polyacrylonitrile fiber in a grafting and blending mode, so that the fiber has the advantages of copolymerization modification and blending modification at the same time, and therefore, the fiber is good in mechanical property, excellent in migration resistance and flame-retardant durability, free of toxic hydrogen halide and other gases during combustion, low in smoke and low in toxicity, and is an environment-friendly product. But its antistatic effect is not good.
The existing antistatic filter material is usually only added with metal wires in base cloth, has poor antistatic effect and cannot quickly eliminate or lead out accumulated charges generated by dust friction; and because the existing dust removing filter material has almost no flame retardant function, the filter material is easy to cause fire or explosion when meeting electric sparks under the action of static charge accumulation.
PAN (polyacrylonitrile, the name of British language is polyacrylonitrile) based carbon fiber is a new material with excellent mechanical properties, and has excellent properties of high strength, high modulus, low density, high temperature resistance, corrosion resistance, friction resistance, electric conduction, heat conduction, small expansion coefficient, shock absorption and the like. The PAN-based carbon fiber is prepared as shown in fig. 1, and includes: monomer initiator, polymerization, spinning, protofilament, pre-oxidation of silk, carbonization or graphitization, surface treatment and sizing to obtain carbon fiber or graphite fiber.
The carbon fiber and the graphite fiber have great difference in strength and elastic modulus, which is mainly due to different structures, the carbon fiber is a polycrystal consisting of small turbostratic graphite crystals and has the carbon content of about 75-95 percent; the structure of graphite fiber is similar to that of graphite, the carbon content can reach 98-99%, and the impurity is less. The carbon content of carbon fibers is related to the carbonization and graphitization processes in the manufacture of the fibers.
Disclosure of Invention
The invention aims to provide a preparation method of a filtering material with flame-retardant and antistatic functions and the filtering material prepared by the preparation method. .
The invention solves the technical problems through the following technical means: the invention provides a preparation method of a flame-retardant antistatic filter material, which comprises the following steps:
step 1, manufacturing a superfine filtering surface layer, namely opening a certain amount of superfine polyphenylene sulfide fibers, fully and uniformly mixing, and processing the superfine polyphenylene sulfide fibers into the superfine filtering surface layer for later use through the procedures of fine opening, carding, lapping, pre-needling, rolling and the like;
step 2, manufacturing the flame-retardant antistatic layer, namely processing a certain amount of PAN-based carbon short fibers (Zhongshenying hawk carbon fiber Co., Ltd.) into the flame-retardant antistatic layer through opening, mixing, fine opening, carding, lapping, pre-needling and rolling, and comprising the following steps:
s21, opening: in feeding PAN base carbon fiber into bale opener, the fibre group is opened and mixed through the effect of tearing of bale opener angle nail curtain, opener parameter: the speed of the angle nail curtain is 5.5-6.5 m/min;
s22, fine opening: further opening the primarily opened PAN-based carbon fibers under the action of 11-13 m/min of an opening doffer and 9-12 m/min of an opening roller of a fine opener;
s23, carding: feeding the finely opened PAN-based fibers into a carding machine for carding, and controlling the carding speed to be 60-65 m/min so that the fibers are carded into a parallel and straight single fiber state;
s24, lapping: the lapping trolley drives the carded fiber net to reciprocate, and meanwhile, the carded fiber net moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60-65 m/min, and the forward moving speed is 5-6 m/min;
s25, pre-needling: needling and reinforcing the fiber layer which is crossly lapped by the lapping trolley to form a needled felt with certain mechanical property, wherein the needling depth is controlled to be 9-10 mm, and the needling density is controlled to be 30-50 p/cm2；
S26, rolling: rolling the PAN-based carbon fiber needled felt formed by pre-needling at the rolling speed of 5-6 m/min for later use;
step 3, preparing a bottom layer, namely, preparing a filtering material bottom layer fiber net from common polyphenylene sulfide fibers through opening, fine opening, carding and lapping processes;
step 4, preparing the integral structure of the filter material:
sequentially unreeling polytetrafluoroethylene or polyphenylene sulfide base cloth, the flame-retardant antistatic layer prepared in the step 2 and the superfine filtering surface layer prepared in the step 1, forming a multilayer structure of a polyphenylene sulfide fiber bottom layer, a base cloth layer, a flame-retardant antistatic layer and a superfine fiber surface layer together with the polyphenylene sulfide fiber layer prepared in the step 3, and preparing the flame-retardant antistatic filtering material after pre-needling, main needling 1, main needling 2, singeing, calendaring and heat setting.
As an optimized technical solution, the step 1 specifically includes:
s11, opening and mixing, namely feeding the agglomerated superfine polyphenylene sulfide fibers with the phi of less than or equal to 10 mu m into a bale opener, opening and mixing the fiber agglomerates under the tearing action of an angle nail curtain of the bale opener, wherein the parameters of the opener are as follows: the speed of the angle nail curtain is 5.5-6.5 m/min;
s12, fine opening, namely, further opening the preliminarily opened superfine polyphenylene sulfide fibers under the action of 11-13 m/min of an opening doffer and 9-12 m/min of an opening roller of a fine opening machine;
s13, carding, namely feeding the finely opened superfine polyphenylene sulfide fibers into a carding machine for carding, and controlling the carding speed to be 60-65 m/min to enable the fibers to be carded into a parallel and straight single fiber state;
s14, lapping, wherein the lapping trolley drives the carded fiber web to reciprocate and moves forwards under the driving of a transmission curtain vertically arranged with the lapping trolley, the reciprocating speed is 60-65 m/min, and the forward moving speed is 5-6 m/min;
s15, pre-needling: needling and reinforcing the fiber layer which is crossly lapped by the lapping trolley to form a needled felt with certain mechanical property, wherein the needling depth is controlled to be 9-10 mm, and the needling density is controlled to be 30-50 p/cm2；
S16, rolling: and rolling the superfine polyphenylene sulfide fiber needled felt formed by pre-needling at the rolling speed of 5-6 m/min for later use.
As an optimized technical solution, the step 3 specifically includes:
s31, opening: feeding ordinary polyphenyl thioether fiber with the diameter of more than 10 microns into a bale opener, and opening and mixing fiber clusters under the tearing action of an angle nail curtain of the bale opener. Parameters of the opener: the speed of the angle nail curtain is 5.5-6.5 m/min;
s32, fine opening: further opening the preliminarily opened common polyphenylene sulfide fibers under the action of 11-13 m/min of an opening doffer and 9-12 m/min of an opening roller of a fine opener;
s33, carding: feeding the finely opened common polyphenylene sulfide fibers into a carding machine for carding, and controlling the carding speed to be 60-65 m/min so that the fibers are carded into a parallel and straight single fiber state;
s34, lapping: the lapping trolley drives the carded fiber net to reciprocate, and meanwhile, the carded fiber net moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60-65 m/min, and the forward moving speed is 5-6 m/min.
As an optimized technical solution, the step 4 specifically includes:
s31, pre-pricking: and (3) consolidating the polyphenylene sulfide fiber bottom layer, the polytetrafluoroethylene or polyphenylene sulfide base cloth layer, the flame-retardant antistatic layer prepared in the step (2) and the superfine filtering surface layer prepared in the step (1) together through pre-needling, wherein the needling depth is controlled to be 10-11 mm, and the needling density is controlled to be 45-55 p/cm2；
S32, main thorn 1: reinforcing and tangling the needled felt after pre-needling, controlling the needling depth to be 6.8-7.4 mm and the needling density to be 300-350 p/cm2；
S33, main thorn 2:further needling the needled felt after the main needling step 1 to improve the cloth cover effect, controlling the needling depth to be 6.0-6.4 mm and the needling density to be 350-370 p/cm2；
S34, singeing: burning off fluff on the outer surface of the needled felt after the main needling step 2, controlling the distance between a cloth cover and a fire hole to be 30-35 mm, and controlling the singeing speed to be 12-15 m/min;
s35, calendering: performing calendaring treatment on the singed needled felt, improving the flatness and air permeability of a cloth cover, and controlling the pressure of a compression roller to be 0.3-0.5 MPa and the speed to be 12-15 m/min;
s36, heat setting: the thermal stability of the needled felt is improved, the needled felt is not easy to shrink in a high-temperature environment, the temperature of six temperature zones of heat setting is controlled within a range of 190-250 ℃, and the speed is 10-12 m/min.
As a specific technical scheme, the preparation method of the flame-retardant antistatic filter material specifically comprises the following steps:
(1) feeding 65mm of superfine polyphenylene sulfide fiber with the phi of less than or equal to 10 mu m into a bale opener, and opening and mixing fiber clusters under the tearing action of an angle nail curtain of the bale opener, wherein the speed of the angle nail curtain is 5.5 m/min; further opening the preliminarily opened superfine polyphenylene sulfide fibers under the action of an opening doffer of a fine opener, 11m/min and 9m/min of an opening roller; feeding the superfine polyphenylene sulfide fibers subjected to fine opening into a carding machine for carding, and controlling the carding speed to be 60m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60m/min, and the forward moving speed is 5 m/min; the fiber layer cross-lapping of the lapping trolley is reinforced by needling to form a needled felt with certain mechanical property, the needling depth is controlled to be 9mm, and the needling density is controlled to be 30p/cm2(ii) a Rolling the superfine polyphenylene sulfide fiber needled felt formed by pre-needling at a rolling speed of 5m/min for later use;
(2) feeding 65mm PAN-based carbon short fibers into a bale opener, opening and mixing fiber clusters under the tearing action of a corner nail curtain of the bale opener, wherein the speed of the corner nail curtain is 5.5 m/min; the primarily opened PAN-based carbon short fiberFurther opening under the action of 11m/min of an opening doffer and 9m/min of an opening roller of a fine opener; feeding the finely opened PAN-based carbon short fibers into a carding machine for carding, and controlling the carding speed to be 60m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60m/min, and the forward moving speed is 5 m/min; the fiber layer cross-lapping of the lapping trolley is reinforced by needling to form a needled felt with certain mechanical property, the needling depth is controlled to be 9mm, and the needling density is controlled to be 30p/cm2(ii) a Rolling the PAN-based carbon short fiber needled felt formed by pre-needling at the rolling speed of 5m/min for later use;
(3) feeding a certain amount of common polyphenylene sulfide fibers into a bale opener, and opening and mixing fiber clusters under the tearing action of a horn nail curtain of the bale opener, wherein the speed of the horn nail curtain is 5.5 m/min; further opening the preliminarily opened common polyphenylene sulfide fibers under the action of an opening doffer of a fine opener at 11m/min and an opening roller at 9 m/min; feeding the finely opened common polyphenylene sulfide fibers into a carding machine for carding, and controlling the carding speed to be 60m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60m/min, and the forward moving speed is 5 m/min;
(4) sequentially unreeling polytetrafluoroethylene-based cloth, the flame-retardant and antistatic layer prepared in the step 2 and the superfine filtering surface layer prepared in the step 1 between the bottom layer mesh laying and needling links, forming a multilayer structure of polyphenylene sulfide fiber bottom layer-base cloth layer-flame-retardant and antistatic layer-superfine fiber surface layer together with the polyphenylene sulfide fiber layer prepared in the step 3, and pre-needling the polyphenylene sulfide fiber bottom layer, the base cloth layer, the flame-retardant and antistatic layer-superfine fiber surface layer together, wherein the needling depth is controlled to be 10mm, and the needling density is 45p/cm2(ii) a The pre-needled felt is further reinforced and intertwined through the main needling 1, the needling depth is controlled to be 6.8mm, and the needling density is 300p/cm2(ii) a Will mainly prickThe needled felt after 1 is further needled through a main needling 2, the needling depth is controlled to be 6.0mm, and the needling density is 350p/cm2。
The invention also provides the flame-retardant antistatic filter material prepared by the preparation method of the flame-retardant antistatic filter material in any scheme.
The invention has the advantages that: according to the invention, the excellent flame retardant property and antistatic property of the PAN-based carbon fiber are utilized, and the PAN-based carbon short fiber is subjected to opening-mixing-fine opening-carding-layering to prepare a flame retardant-antistatic layer; the superfine polyphenylene sulfide fiber is made into a superfine filtering surface layer, so that the filtering precision is improved; then making the common polyphenylene sulfide fiber into a bottom layer; and finally, sequentially carrying out needling and post-finishing on the superfine fiber surface layer, the flame-retardant and antistatic layer, the base cloth layer and the bottom layer to finally prepare the flame-retardant and antistatic filtering material. PAN base carbon fiber can be in time with the charge transfer, need regard PAN base carbon fiber layer as the intermediate level of whole filtering material to there is the carbon fiber flying in filtering material use, lead to electrical components and parts failure in the filtration system. Thereby endowing the filter material with excellent antistatic property and performances of flame retardance, static resistance, dust scouring resistance, high filter precision and the like.
Drawings
FIG. 1 is a cross-section of an ultrafine facing fiber prepared in example 1 of the present invention;
FIG. 2 is a schematic view showing the preparation of a flame-retardant antistatic multi-layer structure filter material of example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation method of the flame-retardant antistatic filter material comprises the following steps:
(1) feeding a certain amount of superfine polyphenylene sulfide fibers (phi is less than or equal to 10 mu m and 65mm) into a bale opener, and opening and mixing fiber clusters under the tearing action of an angle nail curtain of the bale opener (the angle nail curtain speed is 5.5 m/min); further opening the preliminarily opened superfine polyphenylene sulfide fibers under the action of a refined opener opening doffer (11m/min), an opening roller (9m/min) and the like; feeding the superfine polyphenylene sulfide fibers subjected to fine opening into a carding machine for carding, and controlling the carding speed to be 60m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60m/min, and the forward moving speed is 5 m/min; the fiber layer cross-lapping of the lapping trolley is reinforced by needling to form a needled felt with certain mechanical property, the needling depth is controlled to be 9mm, and the needling density is controlled to be 30p/cm2(ii) a And rolling the superfine polyphenylene sulfide fiber needled felt formed by pre-needling at the rolling speed of 5m/min for later use.
(2) Feeding a certain amount of PAN-based carbon short fibers (65mm) into a bale opener, and opening and mixing fiber clusters under the tearing action of a horn nail curtain of the bale opener (the horn nail curtain speed is 5.5 m/min); further opening the primarily opened PAN-based carbon short fibers under the action of a fine opener opening doffer (11m/min), an opening roller (9m/min) and the like; feeding the finely opened PAN-based carbon short fibers into a carding machine for carding, and controlling the carding speed to be 60m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60m/min, and the forward moving speed is 5 m/min; the fiber layer cross-lapping of the lapping trolley is reinforced by needling to form a needled felt with certain mechanical property, the needling depth is controlled to be 9mm, and the needling density is controlled to be 30p/cm2(ii) a And rolling the PAN-based carbon short fiber needled felt formed by pre-needling at the rolling speed of 5m/min for later use.
(3) Feeding a certain amount of common polyphenylene sulfide fibers into a bale opener, and opening and mixing fiber clusters under the tearing action of a horn nail curtain of the bale opener (the speed of the horn nail curtain is 5.5 m/min); further opening the preliminarily opened common polyphenylene sulfide fibers under the action of a refined opener opening doffer (11m/min), an opening roller (9m/min) and the like; feeding the finely opened common polyphenylene sulfide fibers into a carding machine for carding, and controlling the carding speed to be 60m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley carries the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60m/min, and the forward moving speed is 5 m/min.
(4) And (3) sequentially unreeling polytetrafluoroethylene-based cloth, the flame-retardant antistatic layer prepared in the step (2) and the superfine filtering surface layer prepared in the step (1) in the middle of the bottom layer lapping and needling links, and forming a multilayer structure of the polyphenylene sulfide fiber bottom layer, the base cloth layer, the flame-retardant antistatic layer and the superfine fiber surface layer together with the polyphenylene sulfide fiber layer prepared in the step (3). The polyphenylene sulfide fiber bottom layer, the base cloth layer, the flame-retardant-antistatic layer and the superfine fiber surface layer are consolidated together through pre-needling, the needling depth is controlled to be 10mm, and the needling density is controlled to be 45p/cm2(ii) a The pre-needled felt is further reinforced and intertwined through the main needling 1, the needling depth is controlled to be 6.8mm, and the needling density is 300p/cm2(ii) a Further needling the needled felt after the main needling 1 through the main needling 2 to improve the cloth cover effect, controlling the needling depth to be 6.0mm and the needling density to be 350p/cm2(ii) a Burning off the fluff on the outer surface of the needled felt after the main needling 2, controlling the distance between the cloth cover and a fire hole to be 30mm, and controlling the singeing speed to be 12 m/min; controlling the pressure of the compression roller to be 0.3MPa and the speed to be 12 m/min; the temperature of the six temperature zones of heat setting is controlled within the range of 190-250 ℃, and the speed is 10 m/min.
The filter material prepared in the embodiment is subjected to tensile strength test by using a YG026MG-500 electronic fabric strength tester (Wenzhou Square-round instruments, Inc.); testing the conductivity of the flame-retardant antistatic filter material by adopting a four-probe method; the flame retardant performance of the flame retardant antistatic filter material is tested by adopting a vertical combustion method; the filter efficiency of the flame-retardant antistatic filter material is tested by using a filter material static particulate matter filter efficiency tester, and the results are shown in tables 1-4 respectively.
Example 2
The preparation method of the flame-retardant antistatic filter material comprises the following steps:
(1) feeding a certain amount of superfine polyphenylene sulfide fibers (phi is less than or equal to 10 mu m and 65mm) into a bale opener, and opening and mixing fiber clusters under the tearing action of an angle nail curtain of the bale opener (the angle nail curtain speed is 6 m/min); further opening the preliminarily opened superfine polyphenylene sulfide fibers under the action of a refined opener opening doffer (12m/min), an opening roller (10m/min) and the like; feeding the superfine polyphenylene sulfide fibers subjected to fine opening into a carding machine for carding, and controlling the carding speed to be 63m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 63m/min, and the forward moving speed is 5.5 m/min; the fiber layer cross-lapping of the lapping trolley is reinforced by needling to form a needled felt with certain mechanical property, the needling depth is controlled to be 9.2mm, and the needling density is controlled to be 40p/cm2(ii) a And rolling the superfine polyphenylene sulfide fiber needled felt formed by pre-needling at the rolling speed of 5.5m/min for later use.
(2) Feeding a certain amount of PAN-based carbon short fibers (65mm) into a bale opener, and opening and mixing fiber clusters under the tearing action of a corner nail curtain (the speed of the corner nail curtain is 6m/min) of the bale opener; further opening the primarily opened PAN-based carbon short fibers under the action of a refined opener opening doffer (12m/min), an opening roller (10m/min) and the like; feeding the finely opened PAN-based carbon short fibers into a carding machine for carding, and controlling the carding speed to be 63m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 63m/min, and the forward moving speed is 5.5 m/min; the fiber layer cross-lapping of the lapping trolley is reinforced by needling to form a needled felt with certain mechanical property, the needling depth is controlled to be 9.2mm, and the needling density is controlled to be 40p/cm2(ii) a Pre-needling formed PAN-based carbon staple fibersRolling the felt with the needle punched needles for standby application at a rolling speed of 5.5 m/min.
(3) Feeding a certain amount of ordinary polyphenylene sulfide fibers into a bale opener, and opening and mixing fiber clusters under the tearing action of a corner nail curtain (the speed of the corner nail curtain is 6m/min) of the bale opener; further opening the preliminarily opened common polyphenylene sulfide fibers under the action of a refined opener opening doffer (12m/min), an opening roller (10m/min) and the like; feeding the finely opened common polyphenylene sulfide fibers into a carding machine for carding, and controlling the carding speed to be 63m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley carries the carded fiber net to reciprocate, and simultaneously moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 63m/min, and the forward moving speed is 5.5 m/min.
(4) And (3) sequentially unreeling polytetrafluoroethylene-based cloth, the flame-retardant antistatic layer prepared in the step (2) and the superfine filtering surface layer prepared in the step (1) in the middle of the bottom layer lapping and needling links, and forming a multilayer structure of the polyphenylene sulfide fiber bottom layer, the base cloth layer, the flame-retardant antistatic layer and the superfine fiber surface layer together with the polyphenylene sulfide fiber layer prepared in the step (3). The polyphenylene sulfide fiber bottom layer, the base cloth layer, the flame-retardant-antistatic layer and the superfine fiber surface layer are consolidated together through pre-needling, the needling depth is controlled to be 10.2mm, and the needling density is 50p/cm2(ii) a The pre-needled felt is further reinforced and intertwined through the main needling 1, the needling depth is controlled to be 7.0mm, and the needling density is 350p/cm2(ii) a Further needling the needled felt after the main needling 1 through the main needling 2 to improve the cloth cover effect, controlling the needling depth to be 6.2mm and the needling density to be 400p/cm2(ii) a Burning off the fluff on the outer surface of the needled felt after the main needling 2, controlling the distance between the cloth cover and a fire hole to be 33mm, and controlling the singeing speed to be 13 m/min; controlling the pressure of the compression roller to be 0.4MPa and the speed to be 13 m/min; the temperature of the six temperature zones of heat setting is controlled within the range of 190-250 ℃, and the speed is 11 m/min.
The filter material prepared in the embodiment is subjected to tensile strength test by using a YG026MG-500 electronic fabric strength tester (Wenzhou Square-round instruments, Inc.); testing the conductivity of the flame-retardant antistatic filter material by adopting a four-probe method; the flame retardant performance of the flame retardant antistatic filter material is tested by adopting a vertical combustion method; the filter efficiency of the flame-retardant antistatic filter material is tested by using a filter material static particulate matter filter efficiency tester, and the results are shown in tables 1-4 respectively.
Example 3
The preparation method of the flame-retardant antistatic filter material comprises the following steps:
(1) feeding a certain amount of superfine polyphenylene sulfide fibers (phi is less than or equal to 10 mu m and 65mm) into a bale opener, and opening and mixing fiber clusters under the tearing action of an angle nail curtain of the bale opener (the angle nail curtain speed is 6.5 m/min); further opening the preliminarily opened superfine polyphenylene sulfide fibers under the action of a refined opener opening doffer (13m/min), an opening roller (11m/min) and the like; feeding the superfine polyphenylene sulfide fibers subjected to fine opening into a carding machine for carding, and controlling the carding speed to be 65m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 65m/min, and the forward moving speed is 6.0 m/min; the fiber layer cross-lapping of the lapping trolley is reinforced by needling to form a needled felt with certain mechanical property, the needling depth is controlled to be 9.4mm, and the needling density is controlled to be 45p/cm2(ii) a And rolling the superfine polyphenylene sulfide fiber needled felt formed by pre-needling at the rolling speed of 6.0m/min for later use.
(2) Feeding a certain amount of PAN-based carbon short fibers (65mm) into a bale opener, and opening and mixing fiber clusters under the tearing action of a horn nail curtain (the horn nail curtain speed is 6.5m/min) of the bale opener; further opening the primarily opened PAN-based carbon short fibers under the action of a fine opener opening doffer (13m/min), an opening roller (11m/min) and the like; feeding the finely opened PAN-based carbon short fibers into a carding machine for carding, and controlling the carding speed to be 65m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 65m/min, and the forward moving speed is 6.0 m/min; the laying trolley carries out cross laying of the fiber layerNeedling and reinforcing to form a needled felt with certain mechanical property, wherein the needling depth is controlled to be 9.4mm, and the needling density is controlled to be 45p/cm2(ii) a And rolling the PAN-based carbon short fiber needled felt formed by pre-needling at the rolling speed of 6.0m/min for later use.
(3) Feeding a certain amount of common polyphenylene sulfide fibers into a bale opener, and opening and mixing fiber clusters under the tearing action of a horn nail curtain (the speed of the horn nail curtain is 6.5m/min) of the bale opener; further opening the preliminarily opened common polyphenylene sulfide fibers under the action of a refined opener opening doffer (13m/min), an opening roller (11m/min) and the like; feeding the finely opened common polyphenylene sulfide fibers into a carding machine for carding, and controlling the carding speed to be 65m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley carries the carded fiber net to reciprocate, and simultaneously moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 65m/min, and the forward moving speed is 6.0 m/min.
(4) And (3) sequentially unreeling polytetrafluoroethylene-based cloth, the flame-retardant antistatic layer prepared in the step (2) and the superfine filtering surface layer prepared in the step (1) in the middle of the bottom layer lapping and needling links, and forming a multilayer structure of the polyphenylene sulfide fiber bottom layer, the base cloth layer, the flame-retardant antistatic layer and the superfine fiber surface layer together with the polyphenylene sulfide fiber layer prepared in the step (3). The polyphenylene sulfide fiber bottom layer, the base cloth layer, the flame-retardant-antistatic layer and the superfine fiber surface layer are consolidated together through pre-needling, the needling depth is controlled to be 10.4mm, and the needling density is 55p/cm2(ii) a The pre-needled felt is further reinforced and intertwined through the main needling 1, the needling depth is controlled to be 7.2mm, and the needling density is 400p/cm2(ii) a Further needling the needled felt after the main needling 1 through the main needling 2 to improve the cloth cover effect, controlling the needling depth to be 6.4mm and the needling density to be 450p/cm2(ii) a Burning off the fluff on the outer surface of the needled felt after the main needling step 2, controlling the distance between the cloth cover and a fire hole to be 35mm, and controlling the singeing speed to be 15 m/min; controlling the pressure of the compression roller to be 0.5MPa and the speed to be 15 m/min; the temperature of the six temperature zones of heat setting is controlled within the range of 190-250 ℃, and the speed is 12 m/min.
The filter material prepared in the embodiment is subjected to tensile strength test by using a YG026MG-500 electronic fabric strength tester (Wenzhou Square-round instruments, Inc.); testing the conductivity of the flame-retardant antistatic filter material by adopting a four-probe method; the flame retardant performance of the flame retardant antistatic filter material is tested by adopting a vertical combustion method; the filter efficiency of the flame-retardant antistatic filter material is tested by using a filter material static particulate matter filter efficiency tester, and the results are shown in tables 1-4 respectively.
Comparative example 1
In the comparative example, the conventional filter material prepared from the superfine polyphenylene sulfide fiber, the common polyphenylene sulfide fiber and the polytetrafluoroethylene-based cloth is subjected to tensile strength, conductivity, flame retardant property and filtering efficiency tests by the test method consistent with the embodiment, and the results are respectively shown in tables 1-4.
Table 1 tensile strength test results of examples 1 to 3 and comparative example 1
| Warp direction strength/N | Weft strength/N | |
| Example 1 | 1253 | 1354 |
| Example 2 | 1214 | 1416 |
| Example 3 | 1136 | 1298 |
| Comparative example 1 | 1008 | 1241 |
Table 2 results of conductivity tests of examples 1 to 3 and comparative example 1
| Conductivity (S/cm) | |
| Example 1 | 2.7 |
| Example 2 | 2.2 |
| Example 3 | 2.3 |
| Comparative example 1 | 1×10-13 |
Table 3 flame retardant effect test results of examples 1 to 3 and comparative example 1
| Effect of combustion | |
| Example 1 | Extinguishing immediately after leaving fire without molten drop |
| Example 2 | Extinguishing immediately after leaving fire without molten drop |
| Example 3 | Extinguishing immediately after leaving fire without molten drop |
| Comparative example 1 | Slow extinguishing with molten drop |
Table 4 PM2.5 static particulate matter filtration efficiency test results of examples 1-3 and comparative example 1
The above tables indicate that the tensile strength of the flame-retardant-antistatic filter material is greater than that of the conventional filter material, because the strength of the carbon fiber is higher, the overall strength of the filter material containing PAN-based carbon fiber is higher; the filtering efficiency of the flame-retardant and antistatic filtering material on PM2.5 static particles is consistent with that of a conventional filtering material; but the conductive layer of the flame-retardant-antistatic filter material has far better conductivity and flame retardant property than the conventional filter material.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The preparation method of the flame-retardant antistatic filter material is characterized by comprising the following steps of: the method comprises the following steps:
step 1, manufacturing a superfine filtering surface layer, namely opening a certain amount of superfine polyphenylene sulfide fibers, fully and uniformly mixing, and processing the superfine polyphenylene sulfide fibers into the superfine filtering surface layer for later use through the procedures of fine opening, carding, lapping, pre-needling, rolling and the like;
step 2, manufacturing the flame-retardant antistatic layer, namely processing a certain amount of PAN-based carbon short fibers into the flame-retardant antistatic layer by opening, mixing, fine opening, carding, lapping, pre-needling and rolling, and comprising the following steps:
s21, opening: in feeding PAN base carbon fiber into bale opener, the fibre group is opened and mixed through the effect of tearing of bale opener angle nail curtain, opener parameter: the speed of the angle nail curtain is 5.5-6.5 m/min;
s22, fine opening: further opening the primarily opened PAN-based carbon fibers under the action of 11-13 m/min of an opening doffer and 9-12 m/min of an opening roller of a fine opener;
s23, carding: feeding the finely opened PAN-based fibers into a carding machine for carding, and controlling the carding speed to be 60-65 m/min so that the fibers are carded into a parallel and straight single fiber state;
s24, lapping: the lapping trolley drives the carded fiber net to reciprocate, and meanwhile, the carded fiber net moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60-65 m/min, and the forward moving speed is 5-6 m/min;
s25, pre-needling: needling and reinforcing the fiber layer which is crossly lapped by the lapping trolley to form a needled felt with certain mechanical property, wherein the needling depth is controlled to be 9-10 mm, and the needling density is controlled to be 30-50 p/cm2；
S26, rolling: rolling the PAN-based carbon fiber needled felt formed by pre-needling at the rolling speed of 5-6 m/min for later use;
step 3, preparing a bottom layer, namely, preparing a filtering material bottom layer fiber net from common polyphenylene sulfide fibers through opening, fine opening, carding and lapping processes;
step 4, preparing the integral structure of the filter material:
sequentially unreeling polytetrafluoroethylene or polyphenylene sulfide base cloth, the flame-retardant antistatic layer prepared in the step 2 and the superfine filtering surface layer prepared in the step 1, forming a multilayer structure of a polyphenylene sulfide fiber bottom layer, a base cloth layer, the flame-retardant antistatic layer and the superfine filtering surface layer together with the polyphenylene sulfide fiber layer prepared in the step 3, and preparing the flame-retardant antistatic filtering material after pre-needling, main needling 1 and main needling 2, singeing, calendaring and heat setting.
2. The method for preparing a flame-retardant antistatic filter material as claimed in claim 1, wherein: the step 1 specifically comprises:
s11, opening and mixing, namely feeding the agglomerated superfine polyphenylene sulfide fibers with the phi of less than or equal to 10 mu m into a bale opener, opening and mixing the fiber agglomerates under the tearing action of an angle nail curtain of the bale opener, wherein the parameters of the opener are as follows: the speed of the angle nail curtain is 5.5-6.5 m/min;
s12, fine opening, namely, further opening the preliminarily opened superfine polyphenylene sulfide fibers under the action of 11-13 m/min of an opening doffer and 9-12 m/min of an opening roller of a fine opening machine;
s13, carding, namely feeding the finely opened superfine polyphenylene sulfide fibers into a carding machine for carding, and controlling the carding speed to be 60-65 m/min to enable the fibers to be carded into a parallel and straight single fiber state;
s14, lapping, wherein the lapping trolley drives the carded fiber web to reciprocate and moves forwards under the driving of a transmission curtain vertically arranged with the lapping trolley, the reciprocating speed is 60-65 m/min, and the forward moving speed is 5-6 m/min;
s15, pre-needling: needling and reinforcing the fiber layer which is crossly lapped by the lapping trolley to form a needled felt with certain mechanical property, wherein the needling depth is controlled to be 9-10 mm, and the needling density is controlled to be 30-50 p/cm2；
S16, rolling: and rolling the superfine polyphenylene sulfide fiber needled felt formed by pre-needling at the rolling speed of 5-6 m/min for later use.
3. The method for preparing a flame-retardant antistatic filter material as claimed in claim 1, wherein: the step 3 specifically includes:
s31, opening: feeding ordinary polyphenyl thioether fiber with the diameter of more than 10 microns into a bale opener, and opening and mixing fiber clusters under the tearing action of an angle nail curtain of the bale opener. Parameters of the opener: the speed of the angle nail curtain is 5.5-6.5 m/min;
s32, fine opening: further opening the preliminarily opened common polyphenylene sulfide fibers under the action of 11-13 m/min of an opening doffer and 9-12 m/min of an opening roller of a fine opener;
s33, carding: feeding the finely opened common polyphenylene sulfide fibers into a carding machine for carding, and controlling the carding speed to be 60-65 m/min so that the fibers are carded into a parallel and straight single fiber state;
s34, lapping: the lapping trolley drives the carded fiber net to reciprocate, and meanwhile, the carded fiber net moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60-65 m/min, and the forward moving speed is 5-6 m/min.
4. The method for preparing a flame-retardant antistatic filter material as claimed in claim 1, wherein: the step 4 specifically includes:
s31, pre-pricking: and (3) consolidating the polyphenylene sulfide fiber bottom layer, the polytetrafluoroethylene or polyphenylene sulfide base cloth layer, the flame-retardant antistatic layer prepared in the step (2) and the superfine filtering surface layer prepared in the step (1) together through pre-needling, wherein the needling depth is controlled to be 10-11 mm, and the needling density is controlled to be 45-55 p/cm2；
S32, main thorn 1: reinforcing and tangling the needled felt after pre-needling, controlling the needling depth to be 6.8-7.4 mm and the needling density to be 300-350 p/cm2；
S33, main thorn 2: further needling the needled felt after the main needling step 1The cloth cover effect is improved, the needling depth is controlled to be 6.0-6.4 mm, and the needling density is controlled to be 350-370 p/cm2；
S34, singeing: burning off fluff on the outer surface of the needled felt after the main needling step 2, controlling the distance between a cloth cover and a fire hole to be 30-35 mm, and controlling the singeing speed to be 12-15 m/min;
s35, calendering: performing calendaring treatment on the singed needled felt, improving the flatness and air permeability of a cloth cover, and controlling the pressure of a compression roller to be 0.3-0.5 MPa and the speed to be 12-15 m/min;
s36, heat setting: the thermal stability of the needled felt is improved, the needled felt is not easy to shrink in a high-temperature environment, the temperature of six temperature zones of heat setting is controlled within a range of 190-250 ℃, and the speed is 10-12 m/min.
5. The method for preparing a flame-retardant antistatic filter material as claimed in claim 1, wherein: the method comprises the following steps:
(1) feeding 65mm of superfine polyphenylene sulfide fiber with the phi of less than or equal to 10 mu m into a bale opener, and opening and mixing fiber clusters under the tearing action of an angle nail curtain of the bale opener, wherein the speed of the angle nail curtain is 5.5 m/min; further opening the preliminarily opened superfine polyphenylene sulfide fibers under the action of an opening doffer of a fine opener, 11m/min and 9m/min of an opening roller; feeding the superfine polyphenylene sulfide fibers subjected to fine opening into a carding machine for carding, and controlling the carding speed to be 60m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60m/min, and the forward moving speed is 5 m/min; the fiber layer cross-lapping of the lapping trolley is reinforced by needling to form a needled felt with certain mechanical property, the needling depth is controlled to be 9mm, and the needling density is controlled to be 30p/cm2(ii) a Rolling the superfine polyphenylene sulfide fiber needled felt formed by pre-needling at a rolling speed of 5m/min for later use;
(2) feeding 65mm PAN-based carbon short fibers into a bale opener, opening and mixing fiber clusters under the tearing action of a corner nail curtain of the bale opener, wherein the speed of the corner nail curtain is 5.5 m/min; subjecting the preliminarily opened PAN-based carbonThe short fiber is further opened under the action of 11m/min of an opening doffer and 9m/min of an opening roller of a fine opener; feeding the finely opened PAN-based carbon short fibers into a carding machine for carding, and controlling the carding speed to be 60m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60m/min, and the forward moving speed is 5 m/min; the fiber layer cross-lapping of the lapping trolley is reinforced by needling to form a needled felt with certain mechanical property, the needling depth is controlled to be 9mm, and the needling density is controlled to be 30p/cm2(ii) a Rolling the PAN-based carbon short fiber needled felt formed by pre-needling at the rolling speed of 5m/min for later use;
(3) feeding a certain amount of common polyphenylene sulfide fibers into a bale opener, and opening and mixing fiber clusters under the tearing action of a horn nail curtain of the bale opener, wherein the speed of the horn nail curtain is 5.5 m/min; further opening the preliminarily opened common polyphenylene sulfide fibers under the action of an opening doffer of a fine opener at 11m/min and an opening roller at 9 m/min; feeding the finely opened common polyphenylene sulfide fibers into a carding machine for carding, and controlling the carding speed to be 60m/min so that the fibers are carded into a parallel and straight single fiber state; the lapping trolley drives the carded fiber net to reciprocate and moves forwards under the driving of a transmission curtain which is vertically arranged with the lapping trolley, the reciprocating speed is 60m/min, and the forward moving speed is 5 m/min;
(4) sequentially unreeling polytetrafluoroethylene-based cloth, the flame-retardant and antistatic layer prepared in the step 2 and the superfine filtering surface layer prepared in the step 1 between the bottom layer mesh laying and needling links, forming a multilayer structure of polyphenylene sulfide fiber bottom layer-base cloth layer-flame-retardant and antistatic layer-superfine fiber surface layer together with the polyphenylene sulfide fiber layer prepared in the step 3, and pre-needling the polyphenylene sulfide fiber bottom layer, the base cloth layer, the flame-retardant and antistatic layer-superfine fiber surface layer together, wherein the needling depth is controlled to be 10mm, and the needling density is 45p/cm2(ii) a The pre-needled felt is further reinforced and intertwined through the main needling 1, the needling depth is controlled to be 6.8mm, and the needling density is 300p/cm2(ii) a Will masterThe needled felt after being needled 1 is further needled through a main needling 2, the needling depth is controlled to be 6.0mm, and the needling density is 350p/cm2(ii) a Burning off the fluff on the outer surface of the needled felt after the main needling 2, controlling the distance between the cloth cover and a fire hole to be 30mm, and controlling the singeing speed to be 12 m/min; controlling the pressure of the compression roller to be 0.3MPa and the speed to be 12 m/min; the temperature of the six temperature zones of heat setting is controlled within the range of 190-250 ℃, and the speed is 10 m/min.
6. A flame-retardant antistatic filter material prepared by the method for preparing a flame-retardant antistatic filter material according to any one of claims 1 to 5.
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Application publication date: 20210921 |