CN109821300A - A kind of anti-static coated filter material and manufacturing method for flammable explosiveness dust-filtering - Google Patents
A kind of anti-static coated filter material and manufacturing method for flammable explosiveness dust-filtering Download PDFInfo
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- CN109821300A CN109821300A CN201910234783.2A CN201910234783A CN109821300A CN 109821300 A CN109821300 A CN 109821300A CN 201910234783 A CN201910234783 A CN 201910234783A CN 109821300 A CN109821300 A CN 109821300A
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Abstract
The present invention relates to a kind of anti-static coated filter materials for flammable explosiveness dust-filtering comprising filter material substrate, the microporous barrier for being covered in the filter material substrate surface；The microporous barrier is combined into one with the filter material substrate；Wherein contain resin base material and the conductive material being scattered in the resin base material in the material composition of the microporous barrier.Coated filter material of the invention not only has the advantages that coated filter material, such as dust catching is high-efficient, trapping dust size is small, running resistance increases slow, easy deashing etc.；Performance also with the accumulation of good antistatic, antistatic index fully meet and better than GB standards, solve the great difficult problem that current flammable explosiveness dust-filtering place is not available high-performance coated filter material.
Description
Technical field
It is the invention belongs to dedusting filtering material technical field, in particular to a kind of for flammable explosiveness dust-filtering
Anti-static coated filter material and manufacturing method.
Background technique
Bag-type dusting is trapping and one of filtering dust, the most effective technology for collecting valuable powder, is widely used in work
Industry dust field.Filtrate is the core of bag-type dusting, and performance affects the quality of the operational effect of bag dust collector.For some
With flammable all with the place, such as cement plant coal grinding process, blast furnace bunker coal technique of the filtering of explosiveness dust catching etc.
The link of more pulverized coal preparations and collection, magnesium, the polishing of aluminium and its alloy, light metal dust collection link in polishing process, grain,
The processing of the powdered plants such as agricultural product, food, feed and collection link, the industries powder such as tobacco, carpenter, organic plastics processing, weaving
Dirt collects link, and due to friction inside the friction of air-flow and air hose tube wall, air-flow etc. is many, air-flow or dust particles are past
Toward with electrostatic.During dust collection, particle can be attached to the surface of bag dust collector filtrate, high when deduster deashing
The dust of concentration can be full of deduster, reach the explosion limit of these flammable explosiveness dust.The electrostatic of air-flow or particle band is such as
Fruit cannot guide release, when accumulating to a certain extent, it may appear that electrostatic spark, energy will cause dust explosion, cause
Extremely serious personnel casualty accidents.At home and abroad there are many extremely painful cases, such as " 3.15 " Harbin in 1987
Flax factory dust explosion, dead 58 people；" 8.2 " Kunshan Zhong Rong metal product company dust explosion in 2014, dead 75 people.
Coated filter material is the micropore that a kind of surface in Nomex or woven cloth base material is covered with pure polytetrafluoroethylene (PTFE) or polyester
Film, the filtering material to improve efficiency, reduce longtime running resistance.It takes place frequently in haze weather, minimum discharge becomes mainstream
Today, coated filter material become guarantee near-zero release first choice.But polytetrafluoroethylene (PTFE) or polyester are high-molecular organic material, system
At microporous membrane can not be conductive.
Although these antistatic Nomexs are some only in filtrate currently, there is antistatic Nomex product in market
The antistatic Nomex of conductive fiber is added in substrate, but routine is nonconducting to cover polytetrafluoroethyl-ne when these anti-static filter materials are covered with
After alkene film, since its film for trapping dust is insulator, thus it is actually at all non-conductive, to lose static electricity resistance
Can, to the test data of filtrate product after domestic mass market overlay film also turn out its rub current potential, half-life period, the density of surface charge,
Five sheet resistance, bulk resistor antistatic parameters do not reach standard much.The electrostatic carried on flammable explosiveness dust is in filtrate
Dust-collecting face accumulation, can not be guided, when energy rank reaches capacity, there will be the explosions for causing combustible dust, give by filtrate
The safe operation of deduster leaves greatly dangerous hidden danger.
Summary of the invention
(1) technical problems to be solved
To solve current coated filter material because not having antistatic performance, it is not used to flammable explosiveness dust-filtering trapping etc.
Dangerous situation, the present invention provides a kind of anti-static coated filter material and manufacturing method for flammable explosiveness dust-filtering, to mention
Height is filtered the safety of trapping process to flammable explosive dust.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
A kind of anti-static coated filter material for flammable explosiveness dust-filtering comprising: filter material substrate, be covered in it is described
The microporous barrier on filter material substrate surface；The microporous barrier is combined into one with the filter material substrate；The wherein material of the microporous barrier
Contain resin base material and the conductive material being scattered in the resin base material in composition.
In a preferred embodiment of the present invention, the conductive material be conductive carbon fibre, conductive carbon powder, metallic fiber,
Any combination of one or more of metal powder, organic macromolecule-based metal complex conductive fiber, conductive organic polymer.
It is highly preferred that the conductive material is the combination of conductive carbon fibre and conductive carbon powder；Alternatively, the conductive material is
The combination of conductive carbon fibre and metal powder；Alternatively, the conductive material is the combination of metallic fiber and conductive carbon powder；Alternatively, institute
State the combination that conductive material is metallic fiber and metal powder；Alternatively, the conductive material is that organic macromolecule-based metal complex is led
The combination of electric fiber and conductive carbon powder；Alternatively, the conductive material is organic macromolecule-based metal complex conductive fiber and metal
The combination of powder.
Preferably, the conductive carbon powder is graphite powder or Graphene powder.
In a preferred embodiment of the present invention, the microporous barrier material composition in conductive organic polymer be selected from
One of following substance or any combination: conductive polyacetylene, conductive poly p phenylene sulfide, conductive polyparaphenylene, electrically conductive polyaniline,
Electric polypyrrole, conductive polythiophene, organic superconductor TCNQ load transfer complex polymer.
In a preferred embodiment of the present invention, the microporous barrier is combined into one with the filter material substrate with hot pressing or gluing
Body.
In a preferred embodiment of the present invention, the resin base material in the material composition of the microporous barrier is polytetrafluoroethylene (PTFE)
Or polyester.
In a preferred embodiment of the present invention, the filter material substrate is Nomex or woven cloth base material, and substrate is needle thorn
Felt or woven fabric, grammes per square metre are 300-1000 grams/m.
In a preferred embodiment of the present invention, the filter material substrate is Nomex comprising three-decker, middle layer are bases
Cloth, the upper and lower are made of staple fiber through needling process, and are blended with mass fraction in the staple fiber of the upper and lower
The diameter 5-20um of 5%-15%, the conductive carbon fibre of length 1-5cm, metallic fiber or organic macromolecule-based metal complex are conductive
It is one or more of in fiber.Further, the base fabric in the middle layer is being arranged a conductive carbon fibres at interval of 1cm-3cm upwards
It is one or more of in dimension, metallic fiber or organic macromolecule-based metal complex conducting wire fiber yarn.
Preferably, the middle layer base fabric of the Nomex, upper layer and the Fiber Materials of lower layer are selected from polyester, acrylic, nitrile
The combination of one or more of synthetic fibre, polyphenylene sulfide, aramid fiber, polyimides, polytetrafluoroethylene (PTFE), glass fibre.
In a preferred embodiment of the present invention, the filter material substrate is woven fabric, is single layer structure, the single layer knot
The material of structure is glass fibre, polyester or polypropylene fibre；And conductive carbon fibre, a metal are being arranged at interval of 1cm-3cm upwards
It is one or more of in fiber or organic macromolecule-based metal complex conducting wire fiber yarn；One is arranged every 10-30cm in broadwise
It is one or more of in root conductive carbon fibre, metallic fiber or organic macromolecule-based metal complex conducting wire fiber yarn.
The present invention also provides a kind of manufacturing methods of anti-static coated filter material comprising:
S1: preparing conductive microporous barrier: conductive material be added into polytetrafluoroethylene (PTFE) or polyester raw material, 75 DEG C -320 DEG C,
5-50 μm of thickness, porosity 50%-85%, particle diameter distribution 0.3- are made by extruding, biaxial tension under 2-10 times of draw ratio
Conductive microporous barrier between 5um；
S2: conductive microporous barrier prepared by step S1 is mutually compound by hot pressing mode or bonding way with filter material substrate, system
Obtain coated filter material.
As a preferred embodiment of the present invention, wherein in step S1 added conductive material be conductive carbon powder, metal powder,
Conductive carbon fibre, organic macromolecule-based metal complex conductive fiber, conductive polyacetylene, poly p phenylene sulfide, gathers to benzene metallic fiber
Support, polyaniline, polypyrrole, polythiophene or organic superconductor TCNQ load transfer complex polymer.
As a preferred embodiment of the present invention, wherein in step S1, joined into polytetrafluoroethylene (PTFE) or polyester raw material
Conducting powder and conductive fiber；The conducting powder is the conductive carbon powder or metal powder that partial size is lower than 5 μm, accounts for the quality of conductive microporous barrier
Score 0%-10%；The conductive fiber is 0.05-5 μm of diameter, length is 5-50 μm carbon fiber, metallic fiber or organic high
Conductive fiber is complexed in molecule Base Metal, accounts for the mass fraction 5%-15% of conductive microporous barrier.
As a preferred embodiment of the present invention, wherein in step S1, be added and lead into polytetrafluoroethylene (PTFE) or polyester raw material
Voltolisation acetylene, poly p phenylene sulfide, polyparaphenylene, polyaniline, polypyrrole, polythiophene and organic superconductor TCNQ load transfer complex polymer
One or more of, and it is 10%-30% that total amount, which is added, to account for the mass percent of conductive microporous barrier.
As a preferred embodiment of the present invention, wherein in step S2, when the filter material substrate surface is contained at high temperature
When fusible material, such as when polyester, acrylic, acrylic fibers, polyphenylene sulfide, aramid fiber, poly- four are contained in the filter material substrate surface
When one or more of vinyl fluoride, conduction microporous barrier made from step S1 can be laid on filter material substrate surface, by 120
DEG C -320 DEG C, the hot-rolling of 0.5-4kPa pressure, are rolled with the speed of 2-8m/min, conductive microporous barrier are combined into filter material substrate
One, is made coated filter material；
When the filter material substrate surface is without fusible material at high temperature, for example, the filter material substrate surface is only
When containing the polyimides, glass fibre or basalt fibre for being difficult to melt at high temperature, then by being sprayed to filter material substrate surface
Spill fogdrop diameter 0.5-2um, sprinkling quality is 5-20 grams/m of waterproofness adhesive glue, by conduction made from step S1
Microporous barrier is laid on filter material substrate surface, rolls through roller and conductive microporous barrier is combined into one with filter material substrate, overlay film is made
Filtrate.It is further preferred that the waterproofness adhesive glue is electric conductivity glue.
(3) beneficial effect
The beneficial effects of the present invention are:
(1) coated filter material of the invention covers one layer to improve efficiency, reduce longtime running resistance on filter material substrate surface
The conductive microporous barrier of power not only has the advantages that coated filter material, such as dust catching is high-efficient, trapping dust size is small, operation
Resistance increases slow, easy deashing etc.；Performance also with the accumulation of good antistatic, antistatic index fully meet and are better than
National standard solves the great difficult problem that current flammable explosiveness dust-filtering place is not available high-performance coated filter material.
(2) present invention further makes the filter material substrate also contain conductive material, and the filtrate with antistatic performance is made
Substrate, the conductive microporous barrier of mating surface covering, the walking guide for further enhancing entire coated filter material discharge flammable explosiveness dust
The ability of electrostatic prevents accumulation of static electricity, improves the safety that trapping process is filtered to flammable explosive dust.
Electric conductivity micropore is made by blending a certain proportion of conductive filler in the manufacture raw material of microporous barrier in the present invention
Film, then be integrated through hot pressing or gluing with filter material substrate consolidation, anti-static coated filter material is made, can be used for firing the filtering of dust
Trapping.
Detailed description of the invention
Fig. 1 is a kind of process of anti-static coated filter material manufacturing method for flammable explosiveness dust-filtering of the invention
Figure.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
As shown in Figure 1, for a kind of anti-static coated filter material manufacturing method for flammable explosiveness dust-filtering of the present invention
Flow chart, basic process are as follows:
When preparing microporous barrier, to prepare microporous barrier raw material (raw material be usually polytetrafluoroethylene (PTFE) or polyester slice or
Powder) in be added conductive fiber, conductive powder body, auxiliary agent agent, in an extruder squeeze out, membrane, 75 DEG C -320 DEG C of temperature, stretch
2-10 times of multiple it is lower by squeezing, biaxial tension be made 5-50 μm of thickness, porosity 50%-85%, particle diameter distribution 0.3-5um it
Between conductive microporous barrier.
Then according to the hot melt property of the material on filter material substrate surface, if filter material substrate surface contain it is fusible at high temperature
Material when, such as when polyester, acrylic, acrylic fibers, polyphenylene sulfide, aramid fiber, polytetrafluoroethylene (PTFE) are contained in the filter material substrate surface
One or more of when, conduction microporous barrier made from step S1 can be laid on filter material substrate surface, by 120 DEG C -320
DEG C, the hot-rolling of 0.5-4kPa pressure, rolled with the speed of 2-8m/min, conductive microporous barrier be combined into one with filter material substrate,
Coated filter material (finished product) is made.
And when the filter material substrate surface is without fusible material at high temperature, for example, the filter material substrate surface
Only containing when being difficult the polyimides, glass fibre or basalt fibre that melt at high temperature, then by filter material substrate surface
Spray fogdrop diameter 0.5-2um, the waterproofness adhesive glue (preferably electric conductivity glue) that sprinkling quality is 5-20 grams/m,
Conduction microporous barrier made from step S1 is laid on filter material substrate surface, roll through roller by conductive microporous barrier and filter material substrate
It is combined into one, coated filter material is made.
Wherein, filter material substrate is Nomex or woven fabric, and grammes per square metre is about 300-1000 grams/m.The Nomex packet
Three layers, i.e. middle layer base fabric, upper layer and lower layer are included, material can be for selected from polyester, acrylic, acrylic fibers, polyphenylene sulfide, aramid fiber, polyamides
The combination of one or more of imines, polytetrafluoroethylene (PTFE), glass fibre.The filter material substrate is woven fabric, is single layer structure,
Material is glass fibre, polyester or polypropylene fibre.
Further, the filter material substrate is itself mixed with the filter material substrate of conductive material, has filter material substrate also
Electrostatic discharge performance further increases the antistatic performance of entire coated filter material.
Wherein, the mode of filter material substrate incorporation conductive material is preferred are as follows:
When the filter material substrate is Nomex, middle layer is base fabric, and the upper and lower are by staple fiber through needling process system
It can be for selected from polyester, acrylic, acrylic fibers, polyphenylene sulfide, aramid fiber, polyimides, polytetrafluoroethyl-ne at the material in, middle layer, upper and lower level
The combination of one or more of alkene, glass fibre.And quality is blended in the staple fiber of the upper and lower of filter material substrate
The diameter 5-20um of score 5%-15%, the conductive carbon fibre of length 1-5cm, metallic fiber or organic macromolecule-based metal complex
It is one or more of in conductive fiber；Base fabric in middle level is being arranged conductive carbon fibre, a metal at interval of 1cm-3cm upwards
It is one or more of in fiber or organic macromolecule-based metal complex conducting wire fiber yarn.
When the filter material substrate be woven fabric, be single layer structure, and through upwards at interval of 1cm-3cm arrange one lead
It is one or more of in electric carbon fiber, metallic fiber or organic macromolecule-based metal complex conducting wire fiber yarn；In broadwise every
10-30cm arrange a conductive carbon fibre, it is a kind of in metallic fiber or organic macromolecule-based metal complex conducting wire fiber yarn or
It is several.
Technical characteristic of the invention is further illustrated below in conjunction with specific embodiment.
1 antistatic polyester of embodiment (filter material substrate material is polyester) coated filter material
15 μm of the diameter of mass ratio 8% is mixed in polyester staple fiber, the carbon fiber of length 3cm makees the upper layer of filter material substrate
And lower layer, middle layer base fabric uses 130 grams/m of polyester base fabric, and width arranges that a carbon fibre thread is made every 1.5cm
For warp, 450 grams/m of Nomex substrate is made up of needling process for the upper, middle and lower.
Polyester raw material slice in add mass ratio 3% meso-position radius 2um carbon dust and mass ratio 8%, diameter 1um,
Length 15um carbon fiber, using the mixing material as the raw material of biaxial tension filming technology.Extrusion temperature is controlled at 250 DEG C ± 10
DEG C, 78 ± 3 DEG C of longitudinal drawing temperature, 3 times of draw ratio；Transverse drawing temperature is controlled at 95 ± 5 DEG C, 3 times of draw ratio.It is made
For dust-filtering with a thickness of 15 μm, porosity 60%, pore-size distribution 1-3um conductive microporous barrier.
Conduction microporous barrier is layered on substrate, 150 DEG C of roller temperature, pressure 1kPa is adjusted, keeps it equal with 5m/min speed
It is even to roll film-substrate composite, it is consolidated in conductive microporous barrier on substrate, antistatic polyester coated filter material, coal dust is made
Prepare the coal dust trapping in workshop.
2 antistatic aramid fiber of embodiment (filter material substrate material is aramid fiber) coated filter material
20 μm of the diameter of mass ratio 10% is mixed in aramid fiber short fibre, the stainless steel fibre of length 5cm makees filter material substrate
The upper and lower, middle layer base fabric uses 140 grams/m of aramid fiber base fabric, and width arranges a stainless steel yarn every 1cm
600 grams/m of Nomex substrate is made up of needling process as warp, the upper, middle and lower for line.
Mass ratio 10%, diameter 0.5um, length 10um stainless steel are added in polytetrafluoroethylene (PTFE) powder, the mixing material
Expect the raw material as biaxial tension filming technology.270 DEG C of draft temperature of control, vertical and horizontal draw ratio is 8 times, is made
Be made for dust-filtering with a thickness of 20 μm, porosity 65%, pore-size distribution 0.5-2um conductive microporous barrier.
1 μm of fogdrop diameter, 20 grams/m of grammes per square metre conductive viscoses are uniformly sprayed on substrate, and conduction microporous barrier is layered on
On substrate, roll pressure 2kPa is adjusted, so that it was uniformly rolled film-substrate composite with 3m/min speed, makes conductive micropore
Film is consolidated on substrate, and antistatic aramid fiber coated filter material is made, can be used for the collection of grain flour, soyabean protein powder.
3 antistatic overlay film polyphenylene sulfide of embodiment+polytetrafluoroethylene fibre it is compound (filter material substrate material be polyphenylene sulfide+
Polytetrafluoroethylene (PTFE)) filtrate
It is mixed in the polyphenylene sulfide that mass ratio respectively accounts for 50% with polytetrafluoroethylene (PTFE) and mixes the straight of mass ratio 15% in staple fiber
17 μm of diameter, length 4cm stainless steel fibre be made the upper and lower of filter material substrate, middle layer base fabric uses 120 grams/m
Aramid fiber base fabric, and width arranges a carbon fibre thread as warp every 2cm, the upper, middle and lower pass through needling process
650 grams/m of Nomex substrate is made.
The conductive poly p phenylene sulfide of mass ratio 15% is added in polytetrafluoroethylene (PTFE) powder, using the mixing material as two-way
Stretch the raw material of filming technology.250 DEG C of draft temperature of control, vertical and horizontal draw ratio is 6 times, is made for powder
Dirt filtering with a thickness of 25 μm, porosity 50%, pore-size distribution 0.3-3um conductive microporous barrier.
Conduction microporous barrier is layered on substrate, 240 DEG C of roller temperature, pressure 2kPa is adjusted, keeps it equal with 4m/min speed
It is even to roll film-substrate composite, it is consolidated in conductive microporous barrier on substrate, antistatic overlay film polyphenylene sulfide+poly- four is made
Vinyl fluoride fiber composite filtrate, can be used for the trapping of magnesium, aluminium and its alloy dust.
4 antistatic film covered glass fiber composite of embodiment (filter material substrate material is polyimides+aramid fiber+staple glass fibre)
Filtrate
Matter is mixed in polyimides, aramid fiber and glass the mixing staple fiber that mass ratio is respectively 20%, 30% and 50%
Measure 12 μm of the diameter than 13%, the upper and lower that conductive fiber makees filter material substrate, middle layer base fabric is complexed in the acrylic fibers copper of length 4cm
Using 140 grams/m of aramid fiber base fabric, and width arranges an acrylic fibers copper complexing conductive fiber yarn as warp every 1cm
580 grams/m of Nomex substrate is made up of needling process for line, the upper, middle and lower.
The carbon dust and mass ratio 10%, diameter of the meso-position radius 1um of mass ratio 5% are added in polytetrafluoroethylene (PTFE) powder
Conductive fiber is complexed in 3um, length 30um acrylic fibers copper, using the mixing material as the raw material of biaxial tension filming technology.Control is drawn
300 DEG C of temperature are stretched, vertical and horizontal draw ratio is 9 times, is made for dust-filtering with a thickness of 15 μm, porosity
For 80%, pore-size distribution 2-4um conductive microporous barrier.
2 μm of fogdrop diameter, 15 grams/m of grammes per square metre conductive viscoses are uniformly sprayed on substrate, and conduction microporous barrier is layered on
On substrate, roll pressure 3kPa is adjusted, so that it was uniformly rolled film-substrate composite with 5m/min speed, makes conductive micropore
Film is consolidated on substrate, and antistatic film covered glass fiber composite filtrate is made, can be used for feed processing technology powdered coal dust-removing.
5 antistatic film covered glass fiber of embodiment (filter material substrate material is glass fibre) woven fabric filtrate
Glass fiber weaving cloth base material arranges that a stainless steel yarn is warp, every 20cm width cloth every 1cm width
Setting a stainless steel yarn is weft, and the woven fabric grammes per square metre of processing is 1000 grams/m.
The carbon dust and mass ratio 8%, diameter of the meso-position radius 1um of mass ratio 7% are added in polytetrafluoroethylene (PTFE) powder
2um, length 20um carbon fiber, using the mixing material as the raw material of biaxial tension filming technology.230 DEG C of draft temperature of control,
Vertical and horizontal draw ratio is 6 times, is made for dust-filtering with a thickness of 20 μm, porosity 50%, aperture
It is distributed in the conductive microporous barrier of 0.5-2um.
The electric conductivity viscose for uniformly spraying 1 μm of fogdrop diameter on substrate, spraying 10 grams/m of quality, conductive micro-
Pore membrane is layered on substrate, adjusts roll pressure 2.5kPa, it is made uniformly to roll film-substrate composite with 4m/min speed,
It is consolidated in conductive microporous barrier on substrate, antistatic film covered glass fiber composite filtrate is made, can be used for the receipts of carbon element factory's carbon black
Collection.
Claims (10)
1. a kind of anti-static coated filter material for flammable explosiveness dust-filtering, characterized in that it comprises: filter material substrate,
It is covered in the microporous barrier on the filter material substrate surface；The microporous barrier is combined into one with the filter material substrate；It is wherein described micro-
Contain resin base material and the conductive material being scattered in the resin base material in the material composition of pore membrane.
2. a kind of anti-static coated filter material for flammable explosiveness dust-filtering according to claim 1, feature exist
In the conductive material is conductive carbon fibre, conductive carbon powder, metallic fiber, metal powder, organic macromolecule-based metal complex conduction
Any combination of one or more of fiber, conductive organic polymer.
3. a kind of anti-static coated filter material for flammable explosiveness dust-filtering according to claim 2, feature exist
In the conductive material is the combination of conductive carbon fibre and conductive carbon powder；Alternatively, the conductive material is conductive carbon fibre and gold
Belong to the combination of powder；Alternatively, the conductive material is the combination of metallic fiber and conductive carbon powder；Alternatively, the conductive material is gold
Belong to the combination of fiber and metal powder；Alternatively, the conductive material is organic macromolecule-based metal complex conductive fiber and conductive carbon
The combination of powder；Alternatively, the conductive material is the combination of organic macromolecule-based metal complex conductive fiber and metal powder.
4. a kind of anti-static coated filter material for flammable explosiveness dust-filtering according to claim 2, feature exist
In the conductive organic polymer in the material composition of the microporous barrier is selected from one of following substance or any combination: being led
Voltolisation acetylene, conductive poly p phenylene sulfide, conductive polyparaphenylene, electrically conductive polyaniline, electric polypyrrole, conductive polythiophene, You Jichao
Lead TCNQ load transfer complex polymer.
5. a kind of anti-static coated filter material for flammable explosiveness dust-filtering according to claim 1, feature exist
In the filter material substrate is Nomex comprising three-decker, middle layer are base fabrics, and the upper and lower are pierced by staple fiber through needle
Technique is made, and diameter 5-20um, the length 1-5cm of mass fraction 5%-15% are blended in the staple fiber of the upper and lower
Conductive carbon fibre, one or more of in metallic fiber or organic macromolecule-based metal complex conductive fiber.
6. a kind of anti-static coated filter material for flammable explosiveness dust-filtering according to claim 5, feature exist
In the base fabric in the middle layer is being arranged a conductive carbon fibre, metallic fiber or organic polymer at interval of 1cm-3cm upwards
Base Metal is complexed one or more of in conducting wire fiber yarn.
7. a kind of anti-static coated filter material for flammable explosiveness dust-filtering according to claim 1, feature exist
In it is single layer structure that the filter material substrate, which is woven fabric, and the material of the single layer structure is glass fibre, polyester or polypropylene fibre；
And a conductive carbon fibre, metallic fiber or organic macromolecule-based metal complex conducting wire are being arranged at interval of 1cm-3cm upwards
It is one or more of in fiber yarn；A conductive carbon fibre, metallic fiber or organic high score are arranged every 10-30cm in broadwise
It is one or more of in subbase metal complex conducting wire fiber yarn.
8. a kind of manufacturing method of the anti-static coated filter material for flammable explosiveness dust-filtering comprising:
S1: preparing conductive microporous barrier: conductive material be added into polytetrafluoroethylene (PTFE) or polyester raw material, in 75 DEG C -320 DEG C, stretching
2-10 times of multiple it is lower by extruding, biaxial tension be made 5-50 μm of thickness, porosity 50%-85%, particle diameter distribution 0.3-5um it
Between conductive microporous barrier；
S2: conductive microporous barrier prepared by step S1 is mutually compound by hot pressing mode or bonding way with filter material substrate, is made and covers
Film filtering material.
9. manufacturing method according to claim 8, which is characterized in that in step S1, to polytetrafluoroethylene (PTFE) or polyester raw material
In joined conducting powder and conductive fiber；The conducting powder is the conductive carbon powder or metal powder that partial size is lower than 5 μm, and mass fraction is
0%-10%；Carbon fiber, metallic fiber or the organic polymer that the conductive fiber is 0.05-5 μm of diameter, length is 5-50 μm
Conductive fiber, mass fraction 5%-15% is complexed in Base Metal；Or:
In step sl, conductive polyacetylene is added into polytetrafluoroethylene (PTFE) or polyester raw material, poly p phenylene sulfide, polyparaphenylene, gathers
One or more of aniline, polypyrrole, polythiophene and organic superconductor TCNQ load transfer complex polymer, and total amount is added and accounts for conduction
The mass percent of microporous barrier is 10%-30%.
10. manufacturing method according to claim 8, which is characterized in that in step S2, when the filter material substrate surface is contained
At high temperature when fusible material, conduction microporous barrier made from step S1 is laid on filter material substrate surface, by 120 DEG C-
320 DEG C, the hot-rolling of 0.5-4kPa pressure, are rolled with the speed of 2-8m/min, and conductive microporous barrier and filter material substrate are combined into one
Coated filter material is made in body；
When the filter material substrate surface is without fusible material at high temperature, then by spraying droplet to filter material substrate surface
Diameter 0.5-2um, sprinkling quality are 5-20 grams/m of waterproofness adhesive glue, by conduction microporous barrier made from step S1
It is laid on filter material substrate surface, is rolled through roller and conductive microporous barrier is combined into one with filter material substrate, coated filter material is made.
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| CN1170370A (en) * | 1995-10-23 | 1998-01-14 | W·L·戈尔及同仁股份有限公司 | Conductive filter laminate |
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| CN104971549A (en) * | 2015-06-24 | 2015-10-14 | 上海市凌桥环保设备厂有限公司 | Antistatic filtering material for filtering industrial fine particles and preparation method therefor |
| CN107308726A (en) * | 2017-08-30 | 2017-11-03 | 山东新力环保材料有限公司 | A kind of glass compound spiked felt covers PTFE film filtering material and preparation method thereof |
| CN109012233A (en) * | 2018-10-15 | 2018-12-18 | 安徽元琛环保科技股份有限公司 | A kind of preparation method of antistatic microporous teflon membran, film obtained by this method and its application |
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Application publication date: 20190531 Assignee: ZHEJIANG YUBANG FILTER MATERIAL TECHNOLOGY CO.,LTD. Assignor: Northeastern University Contract record no.: X2021210000059 Denomination of invention: The invention relates to an anti-static membrane filter material for filtering combustible and explosive dust and a manufacturing method thereof Granted publication date: 20200519 License type: Common License Record date: 20211202 |
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