CN106552458A - A kind of conducting filtration material and its production method and purposes - Google Patents
A kind of conducting filtration material and its production method and purposes Download PDFInfo
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- CN106552458A CN106552458A CN201510597863.6A CN201510597863A CN106552458A CN 106552458 A CN106552458 A CN 106552458A CN 201510597863 A CN201510597863 A CN 201510597863A CN 106552458 A CN106552458 A CN 106552458A
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Abstract
The present invention discloses a kind of conducting filtration material and its production method and purposes, the conducting filtration material includes spun-bonded non-woven fabrics fid layer, conductive black layer, polytetrafluoroethylporous porous membrane layer, contain conductive black layer at least one side of the spun-bonded non-woven fabrics fid layer, and air flows into surface layer for polytetrafluoroethylporous porous membrane layer, the particle diameter of the conductive black is 2～15 μm.The characteristics of conducting filtration material of the present invention has arresting efficiency height, breathability height, excellent in abrasion resistance, high laminating fastness, can be applicable to anti-static conductive filtering material field., the such as filtration art such as painting dressing automobiles, building materials application, Hardware fitting powder body coating line.
Description
Technical field
The present invention relates to a kind of conducting filtration material and its production method and purposes.
Background technology
With development, the social progress of science and technology, the use of organic polymer non-woven fabrics is more and more extensive.It is well known that most of Polymer non-woven cloth material is always treated as insulant, its ratio resistance is 1012More than Ω, this non-woven fabrics produce charge accumulation during use, easily, in inflammable and explosive field pole fire hazardous, there is potential safety hazard.Therefore, it is substantially all using conductive non-woven fabrics material in the market, but, mostly using black in fiber surface Adsorbed acetylene in current conductive non-woven fabrics material, then conductive non-woven fabrics are reinforced in lapping, conductive non-woven fabrics obtained by this method, due in the combing lapping course of processing easily being destroyed the conductive structure of fiber surface, so as to the conductive effect of obtained conductive non-woven fabrics is poor.Also having directly carries out conductive black processing in nonwoven surface, but impact of the conductive black size to filtering material air permeability is not considered during conductive black is processed, the conductive non-woven fabrics air permeability being prepared is low, this non-woven fabrics are adapted for use with the electric heating products such as electric heating appliance and electric blanket, are not appropriate in filtering material field..
Such as Chinese publication CN2052141U discloses one kind will be with ball millings such as acetylene carbon black, water, 107 glue into conductive paste, it is applied on non-woven fabrics cloth base using manual painting or revolution roll coating, conductive non-woven fabrics are obtained after drying, but due to not limiting to the particle diameter of acetylene carbon black, so that obtained conductive fabric base air permeability is little, while in actual use, crushing is big, filter efficiency is also poor, is not appropriate for used in filtration art.
And for example US publication US005527569A discloses a kind of anti-static conductive filtering material, this non-woven fabrics is made up of spun-bonded non-woven fabrics layer, metal conducting layer and conductive polytetrafluoroethylene floor, due to directly being fitted with conductive polytetrafluoroethylporous porous membrane using metal or metal conductive oxide layer, cause poly tetrafluoroethylene laminating fastness poor, wear no resistance, and this preparation method power consumption is greatly, there is heavy metal pollution, the defect of high cost.
The content of the invention
It is an object of the invention to provide a kind of arresting efficiency is high, breathability is high, the conducting filtration material of excellent in abrasion resistance.
Another object of the present invention is to providing, a kind of energy consumption is low, the production method of free of contamination conducting filtration material.
The technical solution of the present invention is as follows：The conducting filtration material of the present invention includes spun-bonded non-woven fabrics fid layer, conductive black layer, polytetrafluoroethylporous porous membrane layer, contain conductive black layer at least one side of the spun-bonded non-woven fabrics fid layer, and air flows into surface layer for polytetrafluoroethylporous porous membrane layer, the particle diameter of the conductive black is 2～15 μm.
Preferably 5～15 μm of the thickness of polytetrafluoroethylporous porous membrane in conducting filtration material of the present invention.
The carbon black pellet adhesion amount preferably 2～15g/m of conductive black layer in conducting filtration material of the present invention2。
The spun-bonded non-woven fabrics fid layer for constituting the present invention is preferably Nonwoven Cloth of Long Polyester Fibres.
Under pressure 125Pa, the air permeability preferably 15～30cc/cm of polytetrafluoroethylporous porous membrane in conducting filtration material of the present invention2/s。
The sheet resistance of conducting filtration material of the present invention is preferably 1.0 × 105Below Ω.
According to JIS L1096 standards, under the loading of 9.8N power, Rubbing number is preferably more than 50 times conducting filtration material of the present invention back and forth.
The conducting filtration material of the present invention solves conventional conducting filtration material gas permeable degree bottom, the problem for wearing no resistance, as conductive layer employs the polytetrafluoroethylporous porous membrane of the conductive black that particle diameter is 2～15 μm and highly-breathable, the conducting filtration material for obtaining have arresting efficiency height, higher breathability, excellent in abrasion resistance, laminating fastness it is high the characteristics of.The conducting filtration material of the present invention can be applicable to painting dressing automobiles, building materials application, Hardware fitting powder body coating line filtration art, apply also for the fields such as the dustless paint line of electronic product.
Specific embodiment
The conducting filtration material of the present invention includes spun-bonded non-woven fabrics fid layer, conductive black layer, polytetrafluoroethylporous porous membrane layer, contain conductive black layer at least one side of the spun-bonded non-woven fabrics fid layer, and air flows into surface layer for polytetrafluoroethylporous porous membrane layer, the particle diameter of the conductive black is 2～15 μm.There is no larger deformation in cleaner unit because of the change of wind speed in view of conducting filtration material, it is desirable to which filtering material itself has a certain degree of rigidity, is used as supporting layer by the spun-bonded non-woven fabrics using high-air-permeability, improves the rigidity of filter material.If the non-woven fabrics using other materials are used as fid layer, such as melt spraying non-woven fabrics, chemical adhesion non-woven fabrics, due to constitute melt spraying non-woven fabrics fiber it is thinner, arrange between fiber and fiber tight, between fiber and fiber, space is less, do not reach required air permeability, so the conductive product after conductive processing will necessarily air permeability it is low, and do not reach use requirement；The fibre diameter of another aspect melt spraying non-woven fabrics is little, and the firm softness of the non-woven fabrics for obtaining is low, so as to the firm softness for causing final filtration material does not reach use requirement.If adopting chemical adhesion non-woven fabrics, binding agent will certainly be introduced, using the chemical adhesion non-woven fabrics for having binding agent as fid after, as final filtrate is using in chemical environment, binding agent so in non-woven fabrics fid can go bad, the effect of binding agent is not finally had, the life-span of conducting filtration material is reduced.
The features such as there is good chemical stability, heat stability, hydrophobicity and flame retardancy due to politef.The polytetrafluoroethylporous porous membrane by made by politef is a kind of gas separation membrane material of function admirable, has the advantages that ultra-thin light weight, membrane pore structure are uniform and stable, porosity is high, resistance is little, gas flux is big, filter efficiency is high.And as polytetrafluoroethylporous porous membrane has node fibrillar structure, so as to the present invention using polytetrafluoroethylporous porous membrane improving the strainability of conducting filtration material.The aperture of above-mentioned polytetrafluoroethylporous porous membrane is below 5 μm, porosity more than 90%, have obtained conducting filtration material ventilative big, while strainability is also more excellent.Conducting filtration material of the present invention is due to using in filtration art, it must is fulfilled for high arresting efficiency, so the pore size of the polytetrafluoroethylporous porous membrane for using in the present invention is below 5 μm, if the aperture of polytetrafluoroethylporous porous membrane is more than 5 μm, big powder dust particle certainly will cause the arresting efficiency of filtering material to reduce easily through polytetrafluoroethylporous porous membrane.
In view of the actual service condition of conducting filtration material of the present invention, contain conductive black layer at least one side of above-mentioned spun-bonded non-woven fabrics fid layer, and the mean diameter of conductive black is 2～15 μm.Here at least one side of spun-bonded non-woven fabrics fid layer contains conductive black layer and refers to that spun-bonded non-woven fabrics fid layer upper surface and/or lower surface arrange one layer of conductive black layer, i.e., conducting filtration material of the present invention includes two kinds：（1）According to the order of ingress of air, ground floor be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spun-bonded non-woven fabrics fid layer, form three-decker from top to bottom；（2）According to the order of ingress of air, ground floor be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spun-bonded non-woven fabrics fid layer, the 4th layer be conductive black layer, form four-layer structure from top to bottom.It is preferred that the（2）Kind, the（1）Kind it is useful in the not high occasion of conduction needs, and the occasion high for conduction needs can only be using the（2）Kind, that is to say, that the（2）The applicable situation planted is wider, it is advantageous to second.If the mean diameter of conductive black is more than 15 μm, carbon black pellet is filled between the fiber of supporting layer spun-bonded non-woven fabrics, space in spun-bonded non-woven fabrics between fiber and fiber is plugged, so that the air permeability of spun-bonded non-woven fabrics fid layer drastically declines, the air permeability of final obtained conducting filtration material is caused to reduce, in cleaner unit, the resistance of filter material is too high, and crushing is excessive, and does not reach and use standard.And excessive conductive black granule is dispersed in spun-bonded non-woven fabrics surface, so that spun-bonded non-woven fabrics surface irregularity, so follow-up polytetrafluoroethylporous porous membrane it is compound in, polytetrafluoroethylporous porous membrane surface tension will be made uneven, the wearability of polytetrafluoroethylporous porous membrane is reduced, so as to cause obtained conducting filtration material wear-resistant consumption to be deteriorated；And if the mean diameter of conductive black is less than 2 μm, in the conductive course of processing, carbon black conductive fluid can not disperse well, conductive black granule will be agglomerated together, so as to the Surface Machining for not only resulting in spun-bonded non-woven fabrics fid layer is uneven, and as the spun-bonded non-woven fabrics stayed surface with carbon black pellet is uneven, certain impact will also result in the Compound Machining of follow-up polytetrafluoroethylporous porous membrane.In addition, in the particles filled space between the fiber and fiber of spun-bonded non-woven fabrics of conductive black of cohesion, again such that the air permeability of spun-bonded non-woven fabrics fid layer drastically declines, in cleaner unit, the resistance of filter material is very high, and crushing is very big, does not reach the standard for using.
In conducting filtration material of the present invention, the thickness of polytetrafluoroethylporous porous membrane is 5～15 μm.
If the thickness of polytetrafluoroethylporous porous membrane is excessively thin, due to the characteristic of polytetrafluoroethylporous porous membrane itself, the thinner laminating processing to polytetrafluoroethylporous porous membrane of film is more difficult, it is easily caused polytetrafluoroethylporous porous membrane damaged, in addition, during use, thin polytetrafluoroethylporous porous membrane is during use, more cracky, so as to not have the effect of filtration；And if the thickness of polytetrafluoroethylporous porous membrane is blocked up, do not stretched well between the fibril of polytetrafluoroethylporous porous membrane, such polytetrafluoroethylporous porous membrane space is less, node is more, although film strength may be improved, but the air permeability of polytetrafluoroethylporous porous membrane is reduced, the resistance of final obtained conducting filtration material is caused to become big, so as to increased the load of cleaner unit.In view of the problem and production cost problem of the actually used middle air permeability of conducting filtration material, more preferably 6～12 μm of the thickness of the polytetrafluoroethylporous porous membrane.
In view of the problem of conducting filtration material gas permeable degree, wherein the carbon black pellet adhesion amount preferably 2～15g/m of conductive black layer2.If the carbon black pellet adhesion amount of conductive black layer is too high, although improve the electric conductivity of conducting filtration material, but white carbon black adhesion amount height virtually brings the air permeability of filter material to reduce, while the hardness increase of whole filter material is also caused, it is not easy to operate during follow-up discounting；If the adhesion amount of conductive black granule is too low, as amounts of carbon black is less, conductive effect is not reached.In view of filtering material electric conductivity and the problem of air permeability, the carbon black pellet adhesion amount more preferably 4～12g/m of conductive black layer2。
The material that spun-bonded non-woven fabrics fid layer is constituted in conducting filtration material of the present invention is Nonwoven Cloth of Long Polyester Fibres, the Nonwoven Cloth of Long Polyester Fibres is obtained by core sheath polyester fiber, polyester fiber of the sheath fiber using low melting point, core fibre is using the higher PFY fiber of fusing point, with PTFE perforated membrane hot pressing compound tenses, polyester fiber the melting away by part of low melting point, so as to preferably improve the laminating fastness of PTFE film.
As conducting filtration material of the present invention is used for powder body filtration art, it is necessary to which satisfaction can give a discount and process and certain flexibility, and consider that the grammes per square metre of the spun-bonded non-woven fabrics fid layer is in 350g/m with reference to Cost Problems2Below；The stability in use of the resistance to impact and final filter material of conducting filtration materials'use environment is considered in addition, and the grammes per square metre of the spun-bonded non-woven fabrics fid layer is needed more than 160g/m2.Therefore, the grammes per square metre of spun-bonded non-woven fabrics fid layer is preferably 160～350g/m2, more preferably 180～290g/m2.Due to needing through operations such as certain discounting assemblings, so the thickness of the spun-bonded non-woven fabrics fid layer is between 0.30～0.80mm.If the thickness of spun-bonded non-woven fabrics fid layer is blocked up, filtering material does not reach certain firm softness, not easy to operate during discounting, and the filter element of molding does not reach certain stability in use；If under the conditions of same grammes per square metre, if the thickness of spun-bonded non-woven fabrics fid layer is excessively thin, support the too dead of lamination, so that air permeability is reduced, reduce will certainly final conducting filtration material gas permeable degree, in addition if the grammes per square metre that filtering material is made by reducing grammes per square metre is reduced, in the use of rear filter material so on sale, the stability of filter element is bad.Air permeability, discounting and stability in use in view of filtering material, the thickness of above-mentioned spun-bonded non-woven fabrics fid layer is preferably between 0.38～0.70mm.
In conducting filtration material of the present invention, the firm softness of spun-bonded non-woven fabrics fid is between 1200～2800mg, especially the firm softness of warp-wise is greater than the firm softness of broadwise, due to after conducting filtration material gives a discount, during regurgitating and blowing, effect to the warp-wise of filter material is more than broadwise, so the firm softness of warp-wise need to be more than broadwise.If the firm softness of spun-bonded non-woven fabrics fid is too low, the less stable of filter element is finally obtained, is easily caused unbalance stress in use, reduce the service life of filter element；If the firm softness of spun-bonded non-woven fabrics fid is excessive, the follow-up discounting processing of conducting filtration material is difficult, that is, enable and meet the processing that gives a discount, but final filter element is also easily deformed in use, so as to reduce the service life of filtering material.
Air permeability in conducting filtration material of the present invention under spun-bonded non-woven fabrics fid 125Pa is in 15.0～30.0cc/cm2Between/s.If the air permeability of spun-bonded non-woven fabrics fid is too small, so after follow-up conductive processing and polytetrafluoroethylporous porous membrane Compound Machining, cause the air permeability of last obtained conducting filtration material less, do not reach use requirement；If the air permeability of spun-bonded non-woven fabrics fid is excessive, so obtained spun-bonded non-woven fabrics fid becomes stiffening, unfavorable to follow-up discounting, is easily caused polytetrafluoroethylporous porous membrane rupture.
The conducting filtration materials application of the present invention is in filtration art, so conducting filtration material must is fulfilled under certain wind speed, crushing can not be too big, if crushing is too big, not only increase operating cost, and explode with easily causing whole filtration system after reaching certain limit.Accordingly, it is considered to the filter efficiency of the crushing and conducting filtration material of conducting filtration material of the present invention is arrived, the air permeability preferably 15～30cc/cm of polytetrafluoroethylporous porous membrane2/ s, if the air permeability of polytetrafluoroethylporous porous membrane is too big, virtually so that the space between polytetrafluoroethylporous porous membrane fibril increases, although reducing the crushing of conducting filtration material, but the arresting efficiency of filtering material is reduced, after such as filtering, the exit concentration of dust is high, does not reach use requirement；If the air permeability of polytetrafluoroethylporous porous membrane is too little, although can so improve the arresting efficiency of filtering material, filtering material is in the filter, under certain wind speed, crushing rises quickly, after reaching certain limit, which explodes easily to cause filtration, there is very big risk.
Conducting filtration material of the present invention is used as the filtering material for painting dressing automobiles dedusting, it must is fulfilled for the requirement of conduction, if the sheet resistance of conducting filtration material is too big, electrostatic friction in use is susceptible to spark, cause the generation of fire, therefore the sheet resistance of conducting filtration material of the present invention preferably 1.0 × 105Below Ω.
Conducting filtration material of the present invention is due to using in the fields such as painting dressing automobiles dedusting, the filtering material is during use, dust can constantly wash away the surface of filtrate, so the surface of filtrate must is fulfilled for certain wearability, according to JISL1096, tested using Scott crumpling resistance, conducting filtration material of the present invention is under the loading of 9.8N power, Rubbing number is more than 30 times back and forth, preferably more than 50 times.It is if Rubbing number is too low, damaged during polytetrafluoroethylporous porous membrane is easily on sale, so as to reduce the strainability of filtering material, and do not reach use requirement.
The production method of conducting filtration material of the present invention, comprises the steps：
（1）The preparation of conductive supporting material：The conductive black particle dispersion that size is 2～15 μm is sprayed, prints or impregnated at least one side of spun-bonded non-woven fabrics, is then dried in 120～160 DEG C of baking ovens, conductive supporting material is obtained；
（2）The preparation of conducting filtration material：By the wherein one side containing conductive black granule in conductive supporting material and polytetrafluoroethylporous porous membrane temperature be 150～280 DEG C, pressure be to carry out hot pressing and be combined under 100～250KPa, 10～30m/min of linear velocity, final finished product.
Above-mentioned steps（1）Described in carbon black dispersion liquid in, need to add the binding agent of certain proportioning, in order to prevent the carbon black pellet that spray, print or impregnated in spun-bonded non-woven fabrics surface from coming off, require so as to conductive required for not reaching.Whether through spray process, printing processing or impregnation processability, as long as conductive black amount of the processing on spun-bonded non-woven fabrics surface is uniform, and in the case where same conductivity is reached, conductive black adhesion amount is more few better.During impregnation processability, spun-bonded non-woven fabrics will be immersed in conductive black dispersion liquid, and the conducting spunbond non-woven fabrics air permeability for so the obtaining spray process that compares is relatively low so that crushing is larger in use for final conducting filtration material, causes the rising of operating cost.During printing processing, although can control the quantity for spray of conductive black, but printing production line high cost so that and the production cost of final conducting filtration material is improved.So preferred spray process carries out the processing of conductive black in the present invention.
Above-mentioned steps（1）Described in drying temperature be that, between 120～160 DEG C, if drying temperature is less than if 120 DEG C, described conductive support layer thoroughly can not be dried；If drying temperature is more than 160 DEG C, as temperature is too high, wherein the core sheath fibers shape for forming spun-bonded non-woven fabrics changes, virtually so that the air permeability of conductive support layer is reduced, on the other hand, temperature is too high, causes to waste the energy.
Above-mentioned steps（2）Wherein one side containing conductive black granule and the compound hot pressing of polytetrafluoroethylporous porous membrane in the middle material by conductive supporting.If the two sides of conductive black granule is all combined with polytetrafluoroethylporous porous membrane, the air permeability of whole conducting filtration material certainly will be so caused to reduce, running resistance is raised, crushing is excessive.
Above-mentioned steps（2）Described in conductive support layer and polytetrafluoroethylporous porous membrane temperature be 150～280 DEG C, pressure be to carry out hot pressing to be combined under 100～250Kpa, 10～30m/min of speed, why above-mentioned combined temp selects 150～280 DEG C, it is because that combined temp is less than 150 DEG C, do not reach PTFE film and be combined required energy, so that the laminating fastness of final PTFE film is low, the service life of monolithic conductive filtering material is caused to reduce；If combined temp is higher than 280 DEG C, cause to form the core sheath fibers flattening of spun-bonded non-woven fabrics layer in recombination process, so as to the air permeability for causing integral filter material is reduced, in last use, the running resistance of filter material will certainly be caused to increase, increase and filter cost.The factors such as the air permeability and crushing in view of conducting filtration material, preferably 180～250 DEG C of hot pressing temperature.Why above-mentioned composite pressure selects 100～250KPa, is because if composite pressure is less than 100KPa so that the laminating fastness of polytetrafluoroethylporous porous membrane is reduced, and does not reach the requirement for using；If composite pressure is higher than 250KPa, in the recombination process of polytetrafluoroethylporous porous membrane, due to the hypertonia of polytetrafluoroethylporous porous membrane, it may occur that the probability increase of rupture, production efficiency are reduced.The factors such as the qualification rate of laminating fastness and composite finished product in view of polytetrafluoroethylporous porous membrane, pressure preferably 120～200Kp.Why the recombination velocity of above-mentioned polytetrafluoroethylporous porous membrane selects 10～30m/min, it is because that recombination velocity is less than 10m/min, not only in low production efficiency, and recombination process, top and bottom rolls increase action time so that the probability increase of spun-bonded non-woven fabrics fiber deformation；If recombination velocity is more than 30m/min, the compound fastness of polytetrafluoroethylporous porous membrane can be so caused to reduce, so as to reduce the service life of conducting filtration material.
The present invention is explained in more detail below by embodiment, but the present invention is not restricted by the embodiments, the assay method of each physical property of conducting filtration material of the present invention is as follows.
【Grammes per square metre】
Conducting filtration material is cut into into 200 × 200mm
Square, calculate the grammes per square metre of filtering material from weight.
【Thickness】
Using thickness amesdial（Extruding force 0.000245Pa）The thickness of filtering material is determined, 6 points of random selection is measured, and obtains meansigma methodss.
【Air permeability】
The frazier type fabric breathability method of testing specified based on JISL 1096 determines the Air permenbility of filtering material, and measurement site is that 6 points of random selection is measured.
【VDI3926 arresting efficiencies ＆ export dust concentration】
Based on the performance of the standard test filtering material of VDI3926, the size of laboratory sample is diameter 150mm, and the dust concentration of feeding is in 5.0 ± 0.5g/m3, filtration velocity is 2m/min（Air quantity 1.85m3/h）.The order of experiment is, 30 times+stabilisation of initial stage 5000 times+last 30 times.Here initial stage 30 times and the method for last 30 times be, with the prolongation of run time, the pressure reduction on filtering material two sides can be raised gradually, when 1000Pa is reached, pulse of air carries out deashing to the dust on filtering material surface, then next process is carried out, the process is carried out 30 times altogether, pressure and time t is recorded during experiment（Second）Change, while weigh through filtering material dust weight M（g）.Stabilization procedures refer to during operation, carry out deashing to filtering material by time interval of 5s, carry out altogether 5000 times.The pressure of deashing referred to here is 5bar.Impact for longer-term deashing to filter cloth, cleaning cycle is increased respectively to 10000 times, 20000 times simultaneously,
Weight M/ of outlet dust concentration C=through filtering material dust（1.85* time t/3600）
Arresting efficiency=（1- exports dust concentration C/5）*100%.
【Remaining crushing】
After determination test according to VDI 3926, the residual pressure loss of conducting filtration material is measured.
【Firm softness】
According to the firm softness assay method of gringnard type permeability of the regulations of JISL 1096, the firm softness of conductive material is determined.Sample from clip longitude and latitude to length 25mm × 38mm it is each 5 pieces be measured after average.
【Wearability】
Tested according to Scott abrasion resistance in JIS L1096, conducting filtration material of the present invention is under the loading of 9.8N power, sample clamping is under the constant spacing of 2mm, rubbed with the distance of vertical direction 4mm back and forth, the sample longitude and latitude of clip 30mm × 120mm is tested to each 5 pieces, amplify the pattern of 40 times of observation conducting filtration material surfaces after the different number of times that rub, Rubbing number when conducting filtration material starts to occur rupture is recorded as the wearability of the filtering material, the present invention be when conducting filtration material Rubbing number more than or equal to 50 times for excellent, it is good when the Rubbing number of conducting filtration material is more than or equal to 30 times and is less than 50 times, when the Rubbing number of conducting filtration material is more than or equal to 20 times and be general less than 30 times, it is poor less than 20 times.
【Sheet resistance】
Specify to determine according to DIN94345 the sheet resistance of conductive material, the sample of clip 120mm × 120mm it is each 5 pieces be measured after average.
Embodiment 1
（1）The preparation of conductive supporting material：By 17 weight portion of conductive black granule that size is 4 μm, 3 parts by weight propylene acid resins add water 100 weight portions, carry out being sufficiently stirred for being prepared into conductive black dispersion liquid, obtained conductive black homogeneous dispersion is sprayed at spunbond Nonwoven Cloth of Long Polyester Fibres（TORAY, AXTAR, G2260BK, grammes per square metre 260g/m2, thickness 0.61mm, air permeability 17.2cc/cm2Firm softness 2310mg of/s, warp-wise, firm softness 1623mg of broadwise）Tow sides, make carbon black pellet be 4g/m the double-edged adhesion amount of Nonwoven Cloth of Long Polyester Fibres is spun altogether2, it is 24m that then the spun-bonded polyester fibre filament nonwoven by two sides with carbon black pellet is arranged in length, during temperature is 130 DEG C of baking oven, is dried with the speed of 12m/min, conductive supporting material is obtained, and is crimped；
（2）The preparation of conducting filtration material：By above-mentioned steps（1）In obtained conductive supporting material one side and pore size be 1.8 μm, air permeability be 15.2cc/cm2/ s, thickness are that 14 μm of polytetrafluoroethylporous porous membrane is combined, then by hot pressing temperature be 200 DEG C, pressure be 150KPa, linear velocity be to carry out heat lamination to make its integration under 10m/min, finally prepared thickness be 0.60mm, grammes per square metre be 265g/m2, air permeability be 6.50cc/cm2The conducting filtration material of/s.According to the order of ingress of air, the ground floor of the conducting filtration material be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spunbond Nonwoven Cloth of Long Polyester Fibres fid layer, the 4th layer be conductive black layer, form four-layer structure from top to bottom.Each physical property of conducting filtration material of the present invention is referring to table 1.
Embodiment 2
（1）The preparation of conductive supporting material：By 17 weight portion of conductive black granule that size is 10 μm, 3 parts by weight propylene acid resins add water 100 weight portions, carry out being sufficiently stirred for being prepared into conductive black dispersion liquid, obtained conductive black homogeneous dispersion is sprayed at spunbond Nonwoven Cloth of Long Polyester Fibres（TORAY, AXTAR, G2260WH, grammes per square metre 260g/m2, thickness 0.60mm, air permeability 17.5cc/cm2Firm softness 2282mg of/s, warp-wise, firm softness 1555mg of broadwise）Tow sides, make carbon black pellet be altogether 8g/m in the double-edged adhesion amount of spun-bonded polyester fibre continuous yarn non-woven fabrics2, it is 24m that then the spunbond Nonwoven Cloth of Long Polyester Fibres by two sides with carbon black pellet is placed in length, during temperature is 150 DEG C of baking oven, is dried with the speed of 12m/min, conductive supporting material is obtained, and is crimped；
（2）The preparation of conducting filtration material：By above-mentioned steps（1）In obtained conductive supporting material one side and pore size be 2.8 μm, air permeability be 20.2cc/cm2/ s, thickness are that 10 μm of polytetrafluoroethylporous porous membrane is combined, then by hot pressing temperature be 265 DEG C, pressure be 120KPa, linear velocity be to carry out heat lamination to make its integration under 20m/min, finally prepared thickness be 0.61mm, grammes per square metre be 268g/m2, air permeability be 6.25cc/cm2The conducting filtration material of/s.According to the order of ingress of air, the ground floor of the conducting filtration material be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spunbond Nonwoven Cloth of Long Polyester Fibres fid layer, the 4th layer be conductive black layer, form four-layer structure from top to bottom.Each physical property of conducting filtration material of the present invention is referring to table 1.
Embodiment 3
（1）The preparation of conductive supporting material：By 17 weight portion of conductive black granule that size is 8 μm, 3 parts by weight propylene acid resins add water 100 weight portions, carry out being sufficiently stirred for being prepared into conductive black dispersion liquid, obtained conductive black homogeneous dispersion is sprayed at spunbond Nonwoven Cloth of Long Polyester Fibres（TORAY, AXTAR, G2260WH, grammes per square metre 260g/m2, thickness 0.60mm, air permeability be 17.5cc/cm2Firm softness 2282mg of/s, warp-wise, firm softness 1555mg of broadwise）Tow sides, make carbon black pellet be altogether 6g/m in the double-edged adhesion amount of spunbond Nonwoven Cloth of Long Polyester Fibres2, it is 24m that then the spun-bonded polyester fibre filament nonwoven by two sides with carbon black pellet is arranged in length, during temperature is 140 DEG C of baking oven, is dried with the speed of 12m/min, conductive supporting material is obtained, and is crimped；
（2）The preparation of conducting filtration material：By above-mentioned steps（1）In obtained conductive supporting material one side and pore size be 3.5 μm, air permeability be 23.0cc/cm2/ s, thickness are that 8 μm of polytetrafluoroethylporous porous membrane is combined, then by hot pressing temperature be 200 DEG C, pressure be 150KPa, linear velocity be to carry out heat lamination to make its integration under 10m/min, finally prepared thickness be 0.60mm, grammes per square metre be 268g/m2, air permeability be 7.23cc/cm2The conducting filtration material of/s.According to the order of ingress of air, the ground floor of the conducting filtration material be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spunbond Nonwoven Cloth of Long Polyester Fibres fid layer, the 4th layer be conductive black layer, form four-layer structure from top to bottom.Each physical property of conducting filtration material of the present invention is referring to table 1.
Embodiment 4
（1）The preparation of conductive supporting material：By 17 weight portion of conductive black granule that size is 8 μm, 3 parts by weight propylene acid resins add water 100 weight portions, carry out being sufficiently stirred for being prepared into conductive black dispersion liquid, obtained conductive black homogeneous dispersion is sprayed at spunbond Nonwoven Cloth of Long Polyester Fibres（TORAY, AXTAR, G2260BK, grammes per square metre 260g/m2, thickness 0.61mm, air permeability 17.2cc/cm2Firm softness 2310mg of/s, warp-wise, firm softness 1623mg of broadwise）Wherein one side, the carbon black pellet spunbond Nonwoven Cloth of Long Polyester Fibres adhesion amount be 12g/m2, it is 24m that the spunbond Nonwoven Cloth of Long Polyester Fibres with carbon black pellet is placed in length then, during temperature is 160 DEG C of baking oven, is dried with the speed of 12m/min, conductive supporting material is obtained, and is crimped；
（2）The preparation of conducting filtration material：By with carbon black pellet one side and pore size be 3.5 μm, air permeability be 23.0cc/cm2/ s, thickness are that 8 μm of polytetrafluoroethylporous porous membrane is combined, then by hot pressing temperature be 200 DEG C, pressure be 150KPa, linear velocity be to carry out heat lamination to make its integration under 10m/min, finally prepared thickness be 0.61mm, grammes per square metre be 271g/m2, air permeability be 6.01cc/cm2The conducting filtration material of/s.According to the order of ingress of air, the ground floor of the conducting filtration material be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spunbond Nonwoven Cloth of Long Polyester Fibres fid layer, form three-decker from top to bottom.Each physical property of conducting filtration material of the present invention is referring to table 1.
Embodiment 5
（1）The preparation of conductive supporting material：By 17 weight portion of conductive black granule that size is 13 μm, 3 parts by weight propylene acid resins add water 100 weight portions, carry out being sufficiently stirred for being prepared into conductive black dispersion liquid, obtained conductive black homogeneous dispersion is sprayed at spunbond Nonwoven Cloth of Long Polyester Fibres（TORAY, AXTAR, G2200BK, grammes per square metre 200g/m2, thickness 0.53mm, air permeability be 26.3cc/cm2Firm softness 1679mg of/s, warp-wise, firm softness 1211mg of broadwise）Wherein one side, make carbon black pellet spunbond Nonwoven Cloth of Long Polyester Fibres adhesion amount be 8g/m2, it is 24m that the spun-bonded polyester fibre filament nonwoven with carbon black pellet is arranged in length then, during temperature is 150 DEG C of baking oven, is dried with the speed of 12m/min, conductive supporting material is obtained, and is crimped；
（2）The preparation of conducting filtration material：By above-mentioned steps（1）In obtained conductive supporting material one side and pore size be 2.0 μm, air permeability be 15.8cc/cm2/ s, thickness are that 12 μm of polytetrafluoroethylporous porous membrane is combined, then by hot pressing temperature be 200 DEG C, pressure be 150KPa, linear velocity be to carry out heat lamination to make its integration under 10m/min, finally prepared thickness be 0.52mm, grammes per square metre be 208g/m2, air permeability be 5.01cc/cm2The conducting filtration material of/s.According to the order of ingress of air, the ground floor of the conducting filtration material be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spunbond Nonwoven Cloth of Long Polyester Fibres fid layer, form four-layer structure from top to bottom.Each physical property of conducting filtration material of the present invention is referring to table 1.
Embodiment 6
（1）The preparation of conductive supporting material：By 17 weight portion of conductive black granule that size is 10 μm, 3 parts by weight propylene acid resins add water 100 weight portions, carry out being sufficiently stirred for being prepared into conductive black dispersion liquid, obtained conductive black homogeneous dispersion is sprayed at spunbond Nonwoven Cloth of Long Polyester Fibres（TORAY, AXTAR, GB200WH, grammes per square metre 200g/m2, thickness 0.52mm, air permeability be 22.0cc/cm2Firm softness 1646mg of/s, warp-wise, firm softness 1200mg of broadwise）Tow sides, make carbon black pellet be altogether 5g/m in the double-edged adhesion amount of spunbond Nonwoven Cloth of Long Polyester Fibres2, it is 24m that then the spunbond Nonwoven Cloth of Long Polyester Fibres by two sides with carbon black pellet is placed in length, during temperature is 150 DEG C of baking oven, is dried with the speed of 12m/min, conductive supporting material is obtained, and is crimped；
（2）The preparation of conducting filtration material：By above-mentioned steps（1）In obtained conductive supporting material one side and pore size be 3.5 μm, air permeability be 23.0cc/cm2/ s, thickness are that 8 μm of polytetrafluoroethylporous porous membrane is combined, then by hot pressing temperature be 200 DEG C, pressure be 150KPa, linear velocity be to carry out heat lamination to make its integration under 10m/min, finally prepared thickness be 0.52mm, grammes per square metre be 205g/m2, air permeability be 7.94cc/cm2The conducting filtration material of/s.According to the order of ingress of air, the ground floor of the conducting filtration material be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spunbond Nonwoven Cloth of Long Polyester Fibres fid layer, the 4th layer be conductive black layer, form four-layer structure from top to bottom.Each physical property of conducting filtration material of the present invention is referring to table 1.
Embodiment 7
（1）The preparation of conductive supporting material：By 17 weight portion of conductive black granule that size is 4 μm, 3 parts by weight propylene acid resins add water 100 weight portions, carry out being sufficiently stirred for being prepared into conductive black dispersion liquid, obtained conductive black homogeneous dispersion is printed in spunbond Nonwoven Cloth of Long Polyester Fibres（TORAY, AXTAR, G2260BK, grammes per square metre 260g/m2, thickness 0.61mm, air permeability 17.2cc/cm2Firm softness 2310mg of/s, warp-wise, firm softness 1623mg of broadwise）Tow sides, make carbon black pellet be altogether 4g/m in the double-edged adhesion amount of spunbond Nonwoven Cloth of Long Polyester Fibres2, it is 24m that then the spunbond Nonwoven Cloth of Long Polyester Fibres by two sides with carbon black pellet is placed in length, during temperature is 130 DEG C of baking oven, is dried with the speed of 12m/min, conductive supporting material is obtained, and is crimped；
（2）The preparation of conducting filtration material：By above-mentioned steps（1）In obtained conductive supporting material one side and pore size be 1.8 μm, air permeability be 15.2cc/cm2/ s, thickness are that 14 μm of polytetrafluoroethylporous porous membrane is combined, then by hot pressing temperature be 200 DEG C, pressure be 150KPa, linear velocity be to carry out heat lamination to make its integration under 10m/min, finally prepared thickness be 0.61mm, grammes per square metre be 265g/m2, air permeability 6.61cc/cm2The conducting filtration material of/s.According to the order of ingress of air, the ground floor of the conducting filtration material be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spunbond Nonwoven Cloth of Long Polyester Fibres fid layer, the 4th layer be conductive black layer, form four-layer structure from top to bottom.Each physical property of conducting filtration material of the present invention is referring to table 1.
Embodiment 8
（1）The preparation of conductive supporting material：By 17 weight portion of conductive black granule that size is 10 μm, 3 parts by weight propylene acid resins add water 100 weight portions, carry out being sufficiently stirred for being prepared into conductive black dispersion liquid, by spunbond Nonwoven Cloth of Long Polyester Fibres（TORAY, AXTAR, G2260WH, grammes per square metre 260g/m2, thickness 0.60mm, air permeability 17.5cc/cm2Firm softness 2282mg of/s, warp-wise, firm softness 1555mg of broadwise）Impregnated in conductive black dispersion liquid obtained above, make carbon black pellet be 8g/m in the double-edged adhesion amount of spunbond Nonwoven Cloth of Long Polyester Fibres altogether2, it is 24m that then the spunbond Nonwoven Cloth of Long Polyester Fibres by two sides with carbon black pellet is placed in length, during temperature is 150 DEG C of baking oven, is dried with the speed of 12m/min, conductive supporting material is obtained, and is crimped；
（2）The preparation of conducting filtration material：By above-mentioned steps（1）In obtained conductive supporting material one side and pore size be 2.8 μm, air permeability be 20.2cc/cm2/ s, thickness are that 10 μm of polytetrafluoroethylporous porous membrane is combined, then by hot pressing temperature be 265 DEG C, pressure be 120KPa, linear velocity be to carry out heat lamination to make its integration under 20m/min, finally prepared thickness be 0.61mm, grammes per square metre be 269g/m2, air permeability be 5.20cc/cm2The conducting filtration material of/s.According to the order of ingress of air, the ground floor of the conducting filtration material be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spun-bonded polyester fibre continuous yarn non-woven fabrics fid layer, the 4th layer be conductive black layer, form four-layer structure from top to bottom.Each physical property of conducting filtration material of the present invention is referring to table 1.
Conducting filtration material obtained in embodiment 1～8 can be applicable to the filtration arts such as painting dressing automobiles, building materials application, Hardware fitting powder body coating line.
Comparative example 1
（1）The preparation of conductive supporting material：Spunbond polyester non-woven fabrics are plated in aluminum by the method being deposited with（TORAY, AXTAR, G2260BK, grammes per square metre 260g/m2, thickness 0.61mm）Tow sides on, be prepared into conducting filtration material, be then crimped, wherein the aluminium film thickness of non-woven fabrics positive and negative be 3.5nm；
（2）The preparation of conducting filtration material：By above-mentioned steps（1）In obtained conductive supporting material one side and pore size be 1.7 μm, air permeability be 14.2cc/cm2/ s, the polytetrafluoroethylporous porous membrane that 16 μm of thickness are combined, then by hot pressing temperature be 200 DEG C, pressure be 150KPa, linear velocity be to carry out heat lamination to make its integration under 10m/min, make thickness for 0.61mm, grammes per square metre is 203g/m2Conducting filtration material, each physical property of the conducting filtration material is referring to table 2.
Comparative example 2
（1）The preparation of conductive supporting material：By 17 weight portion of conductive black granule that size is 30 μm, 3 parts by weight propylene acid resins add water 100 weight portions, carry out being sufficiently stirred for being prepared into conductive black dispersion liquid, obtained conductive black homogeneous dispersion is sprayed at spunbond Nonwoven Cloth of Long Polyester Fibres（TORAY, AXTAR, G2200BK, grammes per square metre 200g/m2, thickness 0.53mm, air permeability be 26.3cc/cm2Firm softness 1679mg of/s, warp-wise, firm softness 1211mg of broadwise）Tow sides, make carbon black pellet spunbond Nonwoven Cloth of Long Polyester Fibres adhesion amount be 10g/m2, it is 24m that the spun-bonded polyester fibre filament nonwoven with carbon black pellet is arranged in length then, during temperature is 150 DEG C of baking oven, is dried with the speed of 12m/min, conductive supporting material is obtained, and is crimped；
（2）The preparation of conducting filtration material：By above-mentioned steps（1）In obtained conductive supporting material one side and pore size be 1.7 μm, air permeability be 14.2cc/cm2/ s, average thickness are that 16 μm of polytetrafluoroethylporous porous membrane is combined, then by hot pressing temperature be 200 DEG C, pressure be 150KPa, linear velocity be to carry out heat lamination to make its integration under 10m/min, finally prepared thickness be 0.55mm, grammes per square metre be 204g/m2, air permeability be 0.81cc/cm2The conducting filtration material of/s.According to the order of ingress of air, the ground floor of the conducting filtration material be polytetrafluoroethylporous porous membrane layer, the second layer be conductive black layer, third layer be spunbond Nonwoven Cloth of Long Polyester Fibres fid layer, the 4th layer be conductive black layer, form four-layer structure from top to bottom.Each physical property of the conducting filtration material is referring to table 1.
Comparative example 3
By 17 weight portion of conductive black granule that size is 30 μm, 3 parts by weight propylene acid resins add water 100 weight portions, carry out being sufficiently stirred for being prepared into conductive black dispersion liquid, obtained conductive black homogeneous dispersion is sprayed at spunbond Nonwoven Cloth of Long Polyester Fibres（TORAY, AXTAR, G2200BK, grammes per square metre 200g/m2, thickness 0.53mm, air permeability be 26.3cc/cm2Firm softness 1679mg of/s, warp-wise, firm softness 1211mg of broadwise）Tow sides, make carbon black pellet spunbond Nonwoven Cloth of Long Polyester Fibres adhesion amount be 10g/m2, it is 24m that the spunbond Nonwoven Cloth of Long Polyester Fibres with carbon black pellet is placed in length then, during temperature is 150 DEG C of baking oven, is dried with the speed of 12m/min, conductive supporting material is obtained, and is crimped；The grammes per square metre of obtained conductive supporting material is 204g/m2, thickness be 0.54mm, air permeability be 1.13cc/cm2/s.Each physical property of the conducting filtration material is referring to table 2.
Table 1
Table 2
Claims (9)
1. a kind of conducting filtration material, it is characterised in that：The conducting filtration material includes spun-bonded non-woven fabrics fid layer, conductive black layer, polytetrafluoroethylporous porous membrane layer, contain conductive black layer at least one side of the spun-bonded non-woven fabrics fid layer, and air flows into surface layer for polytetrafluoroethylporous porous membrane layer, the particle diameter of the conductive black is 2～15 μm.
2. conducting filtration material according to claim 1, it is characterised in that：The thickness of the polytetrafluoroethylporous porous membrane is 5～15 μm.
3. conducting filtration material according to claim 1, it is characterised in that：The carbon black pellet adhesion amount of the conductive black layer is 2～15g/m2。
4. conducting filtration material according to claim 1, it is characterised in that：The spun-bonded non-woven fabrics fid layer is constituted for Nonwoven Cloth of Long Polyester Fibres.
5. conducting filtration material according to claim 1 and 2, it is characterised in that：Under pressure 125Pa, the air permeability of the polytetrafluoroethylporous porous membrane is 15～30cc/cm2/s。
6. conducting filtration material according to claim 1, it is characterised in that：The sheet resistance of the conducting filtration material is 1.0 × 105Below Ω.
7. conducting filtration material according to claim 1, it is characterised in that：According to JIS L1096 standards, under the loading of 9.8N power, Rubbing number is more than 50 times to the conducting filtration material back and forth.
8. the production method of conducting filtration material described in a kind of claim 1, it is characterised in that：Comprise the steps：
（1）The preparation of conductive supporting material：The conductive black particle dispersion that size is 2～15 μm is sprayed, prints or impregnated at least one side of spun-bonded non-woven fabrics, is then dried in 120～160 DEG C of baking ovens, conductive supporting material is obtained；
（2）The preparation of conducting filtration material：By the wherein one side in conductive supporting material with conductive black granule and polytetrafluoroethylporous porous membrane temperature be 150～280 DEG C, pressure be to carry out hot pressing and be combined under 100～250KPa, 10～30m/min of linear velocity, final finished product.
9. application of the conducting filtration material described in a kind of claim 1 in painting dressing automobiles, building materials application, Hardware fitting powder body coating line filtration art.
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| WO2019174597A1 (en) * | 2018-03-14 | 2019-09-19 | 东丽纤维研究所（中国）有限公司 | Filter material |
| CN115845497A (en) * | 2022-12-24 | 2023-03-28 | 彭昭团 | Filtering material and filter element |
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| CN103764251A (en) * | 2011-08-31 | 2014-04-30 | 大金工业株式会社 | Filter medium for air filter, air filter unit, and method for producing filter medium for air filter |
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| CN101362056A (en) * | 2007-08-09 | 2009-02-11 | 东丽纤维研究所（中国）有限公司 | Coated filter material |
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