CN101168112A - Filter material containing polyphenyl thioether fiber and use - Google Patents
Filter material containing polyphenyl thioether fiber and use Download PDFInfo
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- CN101168112A CN101168112A CNA2006100970022A CN200610097002A CN101168112A CN 101168112 A CN101168112 A CN 101168112A CN A2006100970022 A CNA2006100970022 A CN A2006100970022A CN 200610097002 A CN200610097002 A CN 200610097002A CN 101168112 A CN101168112 A CN 101168112A
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Abstract
The invention discloses filtering materials with polyphenylene sulfide fiber and the usage of the filtering materials. The filtering materials are composed of three layers of a filtering veneer, a non filtering veneer and a middle fabric reinforcing layer, wherein the filtering veneer is a fiber netting which is composed by mixing the fiber with 30wt% to 70wt% of which the average diameter is below 10 micrometers and the fiber with 30wt% to 70wt% of which the average diameter is 10 to 20 mum, the non filtering veneer is a fiber netting formed by fiber of which the average diameter is above 20 micrometers, and the middle layer is the fabric reinforcing layer. At least the fiber of the filtering veneer and the non filtering veneer employ the polyphenylene sulfide fiber within the filtering materials which form the filtering veneer, the non filtering veneer and the middle fabric reinforcing layer. The products of the invention have the advantages of high efficiency of dust arrestment and perfect frictional resistance, and can be used as the materials of filtering bags.
Description
Technical field:
The present invention relates to a kind of filtering material and purposes.
Background technology:
The filtering material of Purge gas has the filtering material of in-depth filtration and the filtering material of surface filtration, and dust removal machine uses the surface filtration filtering material.So-called surface filtration is to capture dust on the filtering material surface, form dust layer on the filtering material surface, capture dust gradually by this dust layer, when thickness that dust layer acquires a certain degree, just remove the dust on filtering material surface, form the filtration that the operation of dust layer is carried out repeatedly on the filtering material surface again by compressed air.
As being configured for filtering from briquette boiler, the fiber of the filtering material of the high-temperature exhaust air that incinerator or Metal Melting furnace etc. are discharged, use is by hear resistance and good polyphenylene sulfide (the being designated hereinafter simply as PPS) fiber of chemical proofing, meta-aromatic polyamide fiber (meta-aramid fibers), the PTFE fiber, the filtering material that non-woven fabrics such as polyimide fiber constitute.Especially the PPS fiber has good hydrolysis, and therefore acid resistance and alkali resistance are extensively used with filter bag as the dedusting of briquette boiler.
In addition, country is more and more stricter to the emission request of briquette boiler flue gas, just requires higher arresting efficiency.So traditional whirlwind method, the moisture film method, electric precipitation method etc. can not satisfy such requirement.Country just requires to filter felt in the type society of advocating thriftiness simultaneously the lower pressure loss, reduces the energy consumption of dust removal machine blower fan.Further, because this high-temperature-resistant filtering material and keel are used, be to use pulse of air to jet in the process of deashing, therefore it should have very strong mechanical strength except wanting chemical resistance and temperature tolerance.
In the patent of Granted publication CN1156327, all be mixed with glass fibre at filtering surface and non-filtering surface, because it is the folding resistance of glass fibre is relatively poor, in use tortuous easily tired, and accelerate the filter bag deterioration, thereby shortened the service life of filtering material.Owing to added thin glass fibre, improved the pressure loss of blower fan simultaneously.
In the patent of publication number 1712100, the filtering material that the inside is told about is a fine fiber layer at filtering surface, though can improve the arresting efficiency of filtering material like this, relatively poor to the abrasion performance of dust for filtering surface in actual use, can shorten service life.
Summary of the invention:
The object of the present invention is to provide a kind of dust catching efficient height, filtering material that contains polyphenylene sulfide fibre and purposes that rub resistance is good.
Technical solution of the present invention is:
A kind of filtering material that contains polyphenylene sulfide fibre, it is characterized in that: this filtering material has three-decker: filter surface layer, non-filtration surface layer, the intermediate fabric enhancement layer, wherein filter surface layer and mix the fleece of forming at 10-20 μ m fiber by containing the fiber and the 30wt%-70wt% average diameter of 30wt%-70wt% average diameter below 10 μ m, non-filtration surface layer is that average diameter is the fibrous fleece of 20～200 μ m, the intermediate layer is the fabric enhancement layer, forming the filtration surface layer, non-filtration surface layer, in the fibrous material of intermediate fabric enhancement layer, filter surface layer at least, the fiber of non-filtration surface layer adopts polyphenylene sulfide fibre.Thus can be good as dust catching efficient, the rising that dust is removed the pressure loss that falls behind down is few, and the good filtering material of mechanical strength.
In the fleece of filtering surface one side, when average fibre diameter surpasses 70wt% greater than the content of the fiber of 10 μ m, infringement compactness, therefore strainability is arranged is the tendency that dust catching efficient reduces, thereby not preferred.And, in the fleece of non-filtering surface one side, average fibre diameter less than the content of the fiber of 20 μ m for a long time, it is fine and close that fleece becomes, the tendency that has the pressure loss of filtering material to raise, thereby not preferred.In addition, as the fibroreticulate fiber that forms above-mentioned filtering surface one side, from obtaining higher dust catching efficient, the average fibre diameter that preferably contains 40wt%～60wt% is less than or equal to the heat resistant fibre of 10 μ m, and the average fibre diameter of 40wt%～60wt% is greater than 10 μ m and be less than or equal to the heat resistant fibre of 20 μ m.The pressure loss and increase filtering material wearability to keel of while in order to reduce filtering material, preferred average diameter is the fleece of the above fiber of 20 μ m as non-filtering surface.The keel here are meant and support the skeleton cylindraceous that filtering material uses, generally are made of metal.
In the fleece of non-filtration surface layer, average diameter is that the content of 27～200 μ m fibers is more than 30wt%.The porosity of this filtering material is 40%-90%;
Porosity (%)=(density (g/cm that forms filtering material fiber
3Density (the g/cm of)-filtering material
3))/form the density (g/cm of filtering material fiber
3) * 100%.
The filtration surface layer of this filtering material has different average pore sizes with non-filtration surface layer, and the average pore size of filtering surface layer is 15 μ m-24 μ m; The average pore size of non-filtration surface layer is 30～300 μ m.
According to JIS L 1096 standards, the grammes per square metre of this filtering material is at 300-1000g/m
2Between.According to JIS L 1096 standards, this filtering material draw Zhang Qiangdu radially more than 500～3000N/5cm, broadwise is more than 500～3000N/5cm.Filtering the surface layer web surface partly is the pars fibrosa of handling through the fusion adhesion.Intermediate fabric enhancement layer fiber is a heat resistant fibre.The fiber of intermediate fabric enhancement layer is short fiber or long filament.
A kind of application that contains the filtering material of polyphenylene sulfide fibre as filter bag.
Usually, adding fine fibre at filtering surface, is by in the average pore size that reduces the filtering surface hole, reaches the effect of both surface filtration, improves the arresting efficiency of filtering material to dust.But all use fine fibre, the intensity on surface can be not enough, can influence the service life of filtering material like this.Therefore adopt the mixing of fine fibre and general fibre in the present invention, satisfied the requirement of intensity and high arresting efficiency simultaneously.
Add crude fibre in filtering material, the aperture that can improve filtering material reduces the pressure loss, therefore adds crude fibre at the relatively little non-filtering surface of filtration and reduces the pressure loss.
The polyphenylene sulfide that uses among the present invention (being designated hereinafter simply as PPS) fiber is the 90wt% of its component unit or contains more than the 90wt%-(C
6H
4-S)
nThe fiber that the polymer of the phenylene sulfide construction unit of-expression constitutes.By using the PPS fiber, can access the good filtering material of hear resistance, chemical proofing and hydrolytic resistance.In the present invention, so-called filtering surface is illustrated in surface filtration with in the filtering material, comprises the initial face that contacts with filtering material of air of dust.That is, be illustrated in that filtering material surface captures dust and the face that forms dust layer.In addition, with the face of its opposition side, the face of promptly having removed the air discharge of dust is defined as non-filtering surface.Among the present invention, so-called intermediate fabric enhancement layer is meant a kind of sparse tissue layer that is formed by yarns interwoven, can make filtering material that certain mechanical strength is arranged by using the fabric enhancement layer.
Filtering material making of the present invention aspect as making fibroreticulate method, can use routine to make short fiber form fibroreticulate method by carding machine.Resulting fleece, use is extruded roller and is applied light compression, after formation is called the state of lap, utilizes needle point method to make the mutual complexing of fiber at thickness direction, makes the fleece of filtering surface one side and non-filtering surface one side.Stack gradually filtering surface one side fleece, strengthen the fleece of fabric and non-filtering surface one side after, undertaken integrated by complexing.Described complexing method is preferably selected from least a method in needle point method and the water spray perforation method, also available additive method.
The non-filtering surface of filtering material of the present invention, it mainly has been the effect of supporting, dust removal by filtration is helped out, therefore consider from angle that reduces the pressure loss and the wearability that increases filtering material, the above average diameter of interpolation 30wt% is that the crude fibre of 27 μ m (7.8T) is suitable, help reducing the pressure loss of filtering material, preferred coarse-fibred content is greater than 50wt%, and more preferably coarse-fibred content is 100wt%.
As the porosity of filtering material, preferably in the scope of 40%-90%, porosity is greater than 90% filtering material, the arresting efficiency of dust is reduced, and porosity is less than 40% filtering material, and throughput is low excessively, improve the pressure loss, increased the energy consumption of dust removal machine blower fan.More preferably porosity is 60%-80%.The definition of porosity here is: the volume of gap accounts for the percentage of filtering material volume in the filtering material.Calculating formula is: porosity (%)=(density (g/cm that forms filtering material fiber
3Density (the g/cm of)-filtering material
3))/form the density (g/cm of filtering material fiber
3) * 100%.Here, the density of filtering material fiber is meant the density (g/cm that forms fiber net fiber
3), the density of filtering material is that the grammes per square metre of filtering material is removed in the thickness of filtering material.The grammes per square metre here is meant the weight of unit square rice filtering material.The density of filtering material fiber (PPS) is 1.34g/cm
3
As the average pore size of filtering material, preferably at 15-24 μ m, the average pore size of non-filtering surface is preferably more than 30um for the average pore size of filtering surface.Filtering surface has little aperture to be beneficial to the arresting efficiency of raising to dust, and non-filtering surface has big aperture to be beneficial to the pressure loss that reduces filtering material.More preferably the average pore size of filtering surface is at 17-22 μ m in addition, and the average pore size of non-filtering surface is more than 40 μ m.
Here the average pore size of filtering material is meant by following formula and obtains:
D: fibre diameter (Denier)
ρ w: the density of filtering material (g/cm3)
ρ p: the density of fiber (g/cm3)
Filtering material of the present invention is as the filtering material that is used for flue gas ash removal, must satisfy the requirement of arresting efficiency, the grammes per square metre large increase cost, grammes per square metre is too little, and to play the fleece of dust removal by filtration effect too thin, can't satisfy the effect of high arresting efficiency, so grammes per square metre is at 300-1000g/m
2Be suitable, further preferred grammes per square metre is 300-700g/m
2The grammes per square metre here is meant the weight of unit square rice filtering material.
Filtering material of the present invention is the filtering material that is used for high temperature fume dust removal, the environment of high-temperature flue gas is the temperature height, have chemical corrosivity, characteristics such as while dust in flue gas concentration height, so filtering material must have certain intensity to satisfy the environment of high-temperature flue gas.Filtering material in use must overcome the gravity of self and the gravity of appendix dust in addition, and during deashing compressed air to the impulsive force of filtering material.Therefore the filtering material brute force is preferably more than 500N/5cm.More preferably the brute force of filtering material is more than 600N/5cm.
Filtering material of the present invention by filtering material is carried out the fusion adhesion in the surface of one side at least, can further improve dust peeling property energy or dust catching efficient.As the method for a part of fusion adhesion that makes web surface, can adopt the methods such as processing or light processing of singing.Particularly requiring under the high situation of dust catching efficient, the fleece that preferably uses filtering surface implement to handle specifically, utilizes the processing of singing of burning flame or infrared ray heating etc. in filtering surface one side of filtering material, or pressurizes with hot-rolling.By such processing, make at least a portion or the generation fusion adhesion of the web surface of filtering surface one side, improve filtering material to dust catching efficient.The adhesion of the fusion here is meant: the part of fiber mixes the state that forms moisture film after by chemistry or physical method liquefy shape.
In the present invention, the fabric enhancement layer works to keep mechanical strength, and therefore being fit to use tensile strength is the fabric enhancement layer of 300～1000N/5cm scope, and preferred tensile strength is at 400-900N/5cm.Constitute the fiber of fabric enhancement layer,, can use para-aramid fiber, meta-aromatic polyamide fiber, PPS fiber, polyimide fiber, fluorine series fiber, carbon fiber, glass fibre etc. so long as it is just passable to have a stable on heating fiber.Especially from the viewpoint of chemical proofing, hydrolytic resistance, preferred use is selected from the fiber of PPS fiber and fluorine series fiber.Consider from the high aspect of mechanical strength, most preferably the PPS fiber.In addition, the mechanical strength of fluorine series fiber is poorer than the PPS fiber, but hear resistance and chemical proofing are good, when therefore using in special rigorous environment, preferably uses the fluorine series fiber.In order not influence the pressure loss as strainability, base cloth is preferably formed sparse weave.As general structure, plain weave, double-layered structure, three-layer weave, jutter tissue, satin weave etc. are arranged.Particularly low-cost, widely used plain cloth can obtain satisfied performance, therefore preferred the use.The preferred warp count of Density is 10～40/2.54cm preferably, is more preferably 20～30/2.54cm, and weft count is 10～30/2.54cm preferably, is more preferably 10～20/2.54cm.
Fiber as constituting the fabric enhancement layer preferably uses staple yarn or long filament.More preferably use the yarn of short fiber, staple yarn and fibroreticulate complexing are good, and it is many that the surface area of fiber becomes, and are suitable on the dust catching efficient of filtering material improves this aspect therefore.
After the filtering material that so makes is made pouch, be suitable as and require the stable on heating filter bag that dedusting is carried out in the exhaust of incinerator or coal-burning boiler or Metal Melting furnace etc.As the suture that uses in making at this, preferably use and the fiber that constitutes fabric similarly with having the line that chemical proofing, stable on heating fibrous material constitute, be fit to use PPS fiber or fluorine series fiber etc., preferred PPS or fluorine series fiber.
Dust catching efficient height of the present invention, the rising of the pressure loss was little after the filtering material surface dust was removed, and because the elongated damage that in the regular hour, reduces the compressed air spraying number of times to filtering material of cleaning cycle time, the crocking resistance on filtering material surface is good simultaneously, the filtering material long service life.In addition, filtering material thermal dimensional stability at high temperature is good, and quality is even, fine and close filtering material.Filter bag of the present invention, constitute by above-mentioned filtering material, therefore the dust catching efficient that is included in the exhaust is good, and and mechanical strengths such as the wearability of keel or fracture strength, stiffness, dimensional stability high and good, thereby can make the filtering material long lifetime.Filtering material of the present invention and filter bag are particularly suitable as the dedusting that is used for filtering from the high-temperature exhaust air of discharges such as incinerator, coal-burning boiler or Metal Melting furnace and use with filter cloth and by its filter bag that constitutes.
Description of drawings:
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the decomposing section of the filtering material that the present invention relates to.
Fig. 2 is that the filtering material that the present invention relates to is the atmospheric dust arresting efficiency measurement result figure of 1m/min at wind speed.
Have 1 among the figure, filter surface layer, 2, the fabric enhancement layer, 3, non-filtration surface layer.
Below, illustrate in greater detail the present invention by embodiment, but the present invention is not subjected to the restriction of these embodiment.The assay method of each rerum natura of filtering material is as follows.
[weight per unit area]
Filtering material is cut into the square of 200 * 200mm, calculates the weight per unit area of filtering material from weight.
[thickness]
Used thickness amesdial (extruding force 0.000245Pa) is measured the thickness of filtering material.Select measure at random at 6, obtain mean value.
[fracture strength]
Measure the fracture strength of filtering material based on the fracture strength method of JISL 1096 regulations.Measuring the position is to select measure at random at 5.
[Air permenbility]
Measure the Air permenbility of filtering material based on the Fu Leize type fabric breathability method of testing of JISL 1096 regulations.Measuring the position is to select measure at random at 6.
[atmospheric dust arresting efficiency]
Use the device of Fig. 2, measure the dust catching efficient of filtering material according to the atmospheric dust counting method.Promptly, in Fig. 2, use is arranged on the asepwirator pump 5 in the downstream of filtering material 5 (Φ 170mm), the air-flow that makes filtration velocity 1m/min is after filtering material 3 was ventilated 5 minutes, use the RION corporate system draw counter (upstream) 4 measure the atmospheric dust of the upstream side of filtering materials 3 (particle diameter: number A 0.3～5 μ m), use the said firm's system particle collector (downstream) 4 to measure the atmospheric dust (particle diameter: number B 0.3～5 μ m) in the downstream of filtering materials 3 simultaneously.Measure sample n and equal 3.From the measurement result that obtains.Obtain arresting efficiency (%) according to following formula.
(1-(B/A))×100
In the formula, A: upstream side atmospheric dust number B: downstream atmospheric dust number
[pressure loss]
Working pressure table 2 is read the atmospheric dust arresting efficiency pressure loss when measuring, that produced by filtering material 3.
[VDI3926 arresting efficiency]
Use the device of Fig. 1, based on the performance of the standard test filtering material of VDI3926, the size of laboratory sample is φ 150mm, and the dust concentration of feeding is at 5g/m3, and filtration velocity is 2m/min.The order of experiment is initial stage 30 times+stabilisation 5000 times+last 30 times.Initial stage here 30 times and last 30 times method are, prolongation along with running time, the pressure reduction on filtering material two sides can raise gradually, when arriving 1000Pa, pulse of air is carried out deashing to the dust on filtering material surface, carries out next process then, and this process is carried out 30 times altogether, record pressure and the variation of time in the process of experiment, detection simultaneously is not filtered the concentration of the dust of material capture.Stabilization procedures is meant in the process of operation, is the time interval filtering material to be carried out deashing with 5s, carries out altogether 5000 times.Here the pressure of the deashing of indication is 5bar.
[filtering material intensity]
Measure the tensile strength of filtering material based on the cloth intensity method of JISL 1096 regulations.Specimen size is 200mm * 50mm, measures with draw speed 100mm/min, chuck interval 100mm.Measured value is the value of 1 intensity in the warp-wise (be the direction vertical with the orientation of fiber, under the situation of the sample that comprises crash and the same direction of the warp-wise of crash) of sample.
[dimensional stability]
Sample is cut into the size of 300mm (warp) * 50mm (latitude),,, under 240 ℃ atmosphere, kept 1 hour to hang the state of 9.8N load in vertical for warp-wise and the vertical that makes sample becomes same direction.Mensuration is implemented the warp-stretch (creep) of the sample after this heat treatment.The formula of obtaining creep is as follows, and the exhausted duration of creep is more near 0, and dimensional stability is good more.
Creep (%)=((length of the sample after the heat treatment)-300) * 100/300
Embodiment 1
Use the PPS short fiber (Dongli Ltd.'s system " Te Kang ") of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm, obtain warp thread 20S/2, weft yarn 20s.Make its plain weave, obtain the PPS short-fibre silk plain cloth of 30/2.54cm of organizine density, 14/2.54cm of tram density.
With this fabric as base cloth, therein on face with 194g/m
2The stacked fleece of weight per unit area, this fleece is that the PPS short fiber (Dongli Ltd.'s system " Te Kang " S101-1.0T51mm) of the PPS short fiber (Dongli Ltd.'s system " Te Kang " S101-2.2T 51mm) of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm and fiber number 1.0 dtexs (average fibre diameter 9.7 μ m), coupe 51mm carries out after short fiber that mixed cotton obtains implements opener, comb and parallel cotton fibers prior to spinning and handle with weight ratio at 50: 50, with 50/cm of thorn pin density
2Carrying out acupuncture obtains.This fleece forms the filter course of filtering surface one side.On the face of the opposite side of fabric with 194g/m
2The stacked following fleece of weight per unit area, this fleece is that PPS short fiber (Dongli Ltd.'s system " Te Kang " S101-7.8T51mm) 100wt% with fiber number 7.8 dtexs (average fibre diameter 27.2 μ m), coupe 51mm carries out after opener, comb and parallel cotton fibers prior to spinning handle, with 50/cm of thorn pin density
2Carrying out acupuncture obtains.This fleece forms the filter course of non-filtering surface one side.Further fabric (base cloth) and above-mentioned fleece are interweaved, obtain weight per unit area 545g/m by acupuncture processing
2, total 300/cm of needling density
2Filtering material, at last to the processing of singing of the filtering surface of filtering material.In addition, in the filtering material that this obtains, see owing to acupuncture handle shrink, weight per unit area is than the tendency that uprises in theory.
Embodiment 2
As the fibroreticulate fiber that constitutes filtering surface one side, with 50: 50 ratios the PPS short fiber of the PPS short fiber of fiber number 1.0 dtexs (average fibre diameter 9.7 μ m), coupe 51mm and fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm is mixed and to use.Further, as the fibroreticulate fiber that constitutes non-filtering surface one side, use fiber number 7.8 dtexs (average fibre diameter is 27 μ m) of 100wt%, the PPS short fiber of coupe 51mm.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
Embodiment 3: as the fibroreticulate fiber that constitutes filtering surface one side, with 60: 40 ratios the PPS short fiber of the PPS short fiber of fiber number 1.0 dtexs (average fibre diameter 9.7 μ m), coupe 51mm and fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm is mixed and to use.Further, as the fibroreticulate fiber that constitutes non-filtering surface one side, use fiber number 7.8 dtexs of 100wt%, the PPS short fiber of coupe 51mm.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
Embodiment 4
As the fibroreticulate fiber that constitutes filtering surface one side, with 50: 50 ratios the PPS short fiber of the PPS short fiber of fiber number 1.0 dtexs (average fibre diameter 9.7 μ m), coupe 51mm and fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm is mixed and to use.Further, as the fibroreticulate fiber that constitutes non-filtering surface one side, with 25: 75 ratios the PPS short fiber of the PPS short fiber of fiber number 1.0 dtexs, coupe 51mm and fiber number 7.8 dtexs, coupe 51mm is mixed and to use.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
Embodiment 5:
As the fibroreticulate fiber that constitutes filtering surface one side, the PPS short fiber of average fibre diameter 9 μ m and the PPS short fiber of average fibre diameter 10～20 μ m (example 10 μ m, 15 μ m, 20 μ m) are mixed use with the ratio of 70: 30 (or 30: 70).Further, as the fibroreticulate fiber that constitutes non-filtering surface one side, average diameter is 20～200 μ m (example 20 μ m, 27 μ m, 100 μ m, 200 μ m), and average diameter is that the content of 27～200 μ m fibers is more than 30wt%.Except that these, adopt and obtain filtering material with embodiment 1 identical method.The porosity of this filtering material is 40%-90% (example 40%, 70%, 90%), and the filtration surface layer of this filtering material has different average pore sizes with non-filtration surface layer, and the average pore size of filtering surface layer is 15 μ m-24 μ m (example 15 μ m, 20 μ m, 24 μ m); The average pore size of non-filtration surface layer is (example 30 μ m, 150 μ m, 300 μ m) below 300 μ m more than the 30 μ m.According to JIS L 1096 standards, the grammes per square metre of this filtering material is at 300-1000g/m
2(routine 300g/m
2, 600g/m
2, 1000g/m
2) between.According to JIS L 1096 standards, the Zhang Qiangdu that draws of this filtering material radially is 500～3000N/5cm (routine 500N/5cm, 1600N/5cm, 3000N/5cm), and broadwise is 500～3000N/5cm (routine 500N/5cm, 1600N/5cm, 3000N/5cm).
The filtering material that contains polyphenylene sulfide fibre that embodiment 1～5 obtains can be used to make filter bag.
Comparative example 1
As the fibroreticulate fiber that constitutes filtering surface one side, use fiber number 2.2 dtexs (average fibre diameter 14.5 μ m) of 100wt%, the PPS short fiber of coupe 51mm.Further, as the fibroreticulate fiber that constitutes non-filtering surface one side, use fiber number 7.8 dtexs of 100wt%, the PPS short fiber of coupe 51mm.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
Comparative example 2
The short fiber of PPS short fiber (the S101-2.2T 51mm of Dongli Ltd. " the Te Kang ") 100wt% of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm is carried out after opener, comb and parallel cotton fibers prior to spinning handle, with 40/cm of needling density
2Carry out false acupuncture, obtain forming the fleece that air flows into the filter course of face and air discharge face, this fibroreticulate weight per unit area is respectively 220g/m
2And 220g/m
2In addition, with forming filtering material, obtain weight per unit area 562g/m with embodiment 1 identical method
2Filtering material.
From the evaluation result of table 1, Fig. 2 as can be known, the filtering material of embodiment 1～4 is compared with 2 filtering material with comparative example 1, dust catching efficient height, and also the loss of the residual pressure of filtering material is also low.Further, embodiment 2,3,4 is better more, and more further, embodiment 2 is best.The arresting efficiency height of filtering material, the pressure loss does not uprise yet.The mechanical strength of filtering material is good simultaneously, and be possible the service life that therefore prolongs filtering material.
Table one
Claims (10)
1. filtering material that contains polyphenylene sulfide fibre, it is characterized in that: this filtering material has three-decker: filter surface layer, non-filtration surface layer, the intermediate fabric enhancement layer, wherein filter surface layer and mix the fleece of forming at 10-20 μ m fiber by containing the fiber and the 30wt%-70wt% average diameter of 30wt%-70wt% average diameter below 10 μ m, non-filtration surface layer is that average diameter is the fibrous fleece of 20～200 μ m, the intermediate layer is the fabric enhancement layer, forming the filtration surface layer, non-filtration surface layer, in the fibrous material of intermediate fabric enhancement layer, filter surface layer at least, the fiber of non-filtration surface layer adopts polyphenylene sulfide fibre.
2. the filtering material that contains polyphenylene sulfide fibre according to claim 1 is characterized in that: in the fleece of non-filtration surface layer, average diameter is that the content of 27 μ m～200 μ m fibers is more than 30wt%.
3. the filtering material that contains polyphenylene sulfide fibre according to claim 1 is characterized in that: the porosity of this filtering material is 40%-90%;
Porosity (%)=(density (g/cm that forms filtering material fiber
3Density (the g/cm of)-filtering material
3))/form the density (g/cm of filtering material fiber
3) * 100%.
4. the filtering material that contains polyphenylene sulfide fibre according to claim 1 and 2 is characterized in that: the filtration surface layer of this filtering material has different average pore sizes with non-filtration surface layer, and the average pore size of filtering surface layer is 15 μ m-24 μ m; The average pore size of non-filtration surface layer is at 30～300 μ m.
5. the filtering material that contains polyphenylene sulfide fibre according to claim 1 and 2 is characterized in that: according to JIS L 1096 standards, the grammes per square metre of this filtering material is at 300-1000g/m
2Between.
6. the filtering material that contains polyphenylene sulfide fibre according to claim 1 and 2 is characterized in that: according to JIS L 1096 standards, the Zhang Qiangdu that draws of this filtering material radially is 500～3000N/5cm, and broadwise is 500～3000N/5cm.
7. the filtering material that contains polyphenylene sulfide fibre according to claim 1 and 2 is characterized in that: filtering the surface layer web surface partly is the pars fibrosa of handling through the fusion adhesion.
8. the filtering material that contains polyphenylene sulfide fibre according to claim 1 and 2 is characterized in that: intermediate fabric enhancement layer fiber is a heat resistant fibre.
9. the filtering material that contains polyphenylene sulfide fibre according to claim 8 is characterized in that: the fiber of intermediate fabric enhancement layer is short fiber or long filament.
10. described application that contains the filtering material of polyphenylene sulfide fibre as filter bag of claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100970022A CN101168112A (en) | 2006-10-24 | 2006-10-24 | Filter material containing polyphenyl thioether fiber and use |
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|---|---|---|---|
| CNA2006100970022A CN101168112A (en) | 2006-10-24 | 2006-10-24 | Filter material containing polyphenyl thioether fiber and use |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108635964A (en) * | 2018-05-14 | 2018-10-12 | 天津工业大学 | A kind of preparation method of high temperature resistant filtration fabrics |
| CN112743946A (en) * | 2019-10-30 | 2021-05-04 | 东丽纤维研究所（中国）有限公司 | Filtering material |
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