CN109745773A - A kind of liquid filtering filter cloth and its manufacturing method and purposes - Google Patents
A kind of liquid filtering filter cloth and its manufacturing method and purposes Download PDFInfo
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- CN109745773A CN109745773A CN201711076017.5A CN201711076017A CN109745773A CN 109745773 A CN109745773 A CN 109745773A CN 201711076017 A CN201711076017 A CN 201711076017A CN 109745773 A CN109745773 A CN 109745773A
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Abstract
The present invention discloses a kind of liquid filtering filter cloth and its manufacturing method and purposes, which is the woven fabric formed by organic fiber, and the filoplume length of the filter cloth surface is in 0.50mm hereinafter, aperture at 5 μm below accounts for 75.0% or more in the filter cloth.Filter cloth of the invention has the characteristics that high temperature resistant, acid-alkali-corrosive-resisting, surface hairiness are low, filtering accuracy is high, which can be widely applied in the filter elements such as filter press.
Description
Technical field
The present invention relates to a kind of liquid filtering filter cloth and its manufacturing methods and purposes.
Background technique
Filter cloth is the important component part of filter press, it is considered to be the heart of filter, as a kind of widely used mistake
Filter medium plays an important role during being separated by filtration, and directly affects filter effect.With the development of the society, industry
Development, such as the requirement of mining industry, chemical industry, food, environmental protection field to liquid filtering technique are higher and higher, and then will be to filter cloth
It is required that higher and higher, this is just related to the weaving process of filter cloth, post-processing condition and fibrous material to the influence of filter cloth.
However, existing common material filter cloth cannot fully meet the requirement in certain particular surroundings, such as strong acid-base and high temperature
Environment.
In the prior art in order to improve the filtering accuracy of filter cloth, when being typically employed in weaving, knitted using weight pound rapier loom
It makes, improves the thread count of fabric, increases the method for fabric cover, so that yarn spacing reduces, fitted closely between yarn,
And then fabric pore size is reduced, fabric filtration precision is improved, but there are upper limit values for fabric cover, once reach, even if again
Increase weaving tension, coverage coefficient is also difficult to improve, and fabric pore size is difficult to further decrease, and filtering accuracy can not be mentioned further
It is high.Filter cloth is made using spun yarn in addition, though also having, but there are a large amount of filoplumes on spun yarn surface, in actual filtration process
In, under the friction repeatedly of filter material, easily filoplume is caused to fall off, contaminated filter clear liquid or filtrate.
It is as a kind of using polypropylene fiber silk as the filter cloth of raw material and its production in disclosed in Chinese publication CN101332384A
Method, although the filter cloth has the characteristics that filtering accuracy is high, strength height, long service life, is easy to discharging, the peace of Polypropylene
Temperature is entirely used at 100 DEG C hereinafter, it is short, strong that there are service life in 100 DEG C or more, acid and alkali corrosion liquid filtering industry
The low problem of power.
What the liquid that for another example China publication CN101987266A discloses that a kind of polyphenylene sulfide fibre is raw material filtered
Industrial filter cloth and application thereof also has high temperature resistant, drug-resistant, heat-resistant etc. although the existing good filter effect of the filter cloth
Performance, but the filter cloth is made of polyphony thioether short fiber or polyphenyl thioether filament, using filter cloth made from polyphony thioether short fiber
Surface hairiness is more, and in filter process, filoplume falls off, and there are the possibility of secondary pollution.
Summary of the invention
The purpose of the present invention is to provide a kind of high temperature resistants, the liquid filtering filter cloth of the retention high and low filoplume of precision.
A kind of manufacture of another object of the present invention is to provide environmental pollutions liquid filtering filter cloth small, at low cost
Method.
Technical solution of the invention is as follows: liquid filtering of the invention with filter cloth be formed by organic fiber it is woven
Object, the filoplume length of the filter cloth surface is in 0.50mm hereinafter, aperture at 5 μm below accounts for 75.0% or more in the filter cloth.
The composition fluid present invention filtering single twist multiplier preferably 200~350 of filter cloth, ply twist multiplier preferably 180~
400。
It constitutes the preferred polyphenylene sulfide fibre of organic fiber of fluid present invention filtering filter cloth, polytetrafluoroethylene fibre, gather
At least one of the double oxazole fibers of benzo, polyetheretherketonefiber fiber, polysulfone fibre, polyester fiber, Fypro.
Fluid present invention filtering thickness preferably 0.4~1.5mm of filter cloth.
The fluid present invention filtering coverage coefficient preferably 2100~2700 of filter cloth.
In the case where measuring pressure 200P, fluid present invention filtering venting quality preferably 1~20mm/s of filter cloth.
Beneficial effects of the present invention: liquid filtering of the invention with filter cloth solve previous liquid filter cloth non-refractory,
The not more defect of drug-resistant, surface hairiness, filter cloth of the invention have that high temperature resistant, acid-alkali-corrosive-resisting, surface hairiness be low, filtering
Feature with high accuracy, the filter cloth can be widely applied in the filter elements such as filter press.
Specific embodiment
Liquid filtering of the invention is the woven fabric formed by organic fiber with filter cloth, and the filoplume length of the filter cloth surface exists
0.50mm is hereinafter, aperture at 5 μm below accounts for 75.0% or more in the filter cloth.The yarn of liquid filtering filter cloth of the invention is
By organic fiber by the techniques such as opener-cotton carding-drafting-resultant yarn so that mutually twisted between organic short fiber, wind it is obtained, this
Sample can not can cause some staple fiber dimension end exposed outside in which keep away, so that filter cloth surface will generate filoplume.The present invention is used and is mentioned
High yarn twist, filter cloth surface singe, the methods of calendering reduces or removal surface hairiness so that the hair of filter cloth surface of the invention
Plumage length is in 0.50mm or less.Here raising yarn twist be in order to keep obvolvent between staple fiber even closer, filter cloth by
Fiber is not easy to run out of when friction, reduces surface hairiness；Using filter cloth surface singe processing be in order to which filter cloth is under flame interaction, it is naked
The long filoplume melting to expose outside fits perfectly and filter cloth surface, reduces or remove surface hairiness；At the further calendering of filter cloth surface
Reason is to melt under the action of calendering high temperature and pressure by not thorough filoplume removal during singing and be tightly attached to filter
Cloth surface further decreases or removes filter cloth surface filoplume.If the filoplume length of the liquid filtering filter cloth surface is greater than
0.50mm, then during the filtration process, since surface hairiness is too long, repeatedly friction of the filter cloth by filter material, filoplume is easy
It falls off, generates secondary pollution, in addition too long filoplume is torn in material friction, is highly vulnerable to breakage filter cloth structure, leads to filter cloth hole
Diameter tears increase, so that the filtering accuracy of filter cloth will be reduced.In view of filter cloth secondary pollution degree of the present invention, fluid present invention
The filoplume length of filtering filter cloth surface is preferably in 0.10mm or less.
The pore size of filter cloth of the present invention decides the filtering accuracy of filter cloth, and aperture below accounts for 75.0% at 5 μm in filter cloth
More than, when can guarantee that filter cloth filters in the early stage in this way, 5 μm or more particulate matters cannot largely penetrate filter cloth in filtrate, these
Particulate matter is just intercepted at turbid solution side, so that clear liquid side filtrate is clarified, greatly improves filter efficiency and precision.If aperture exists
5 μm of proportions below illustrate that the aperture ratio in filter cloth at 5 μm or more increases, the aperture of filter cloth is equal less than 75.0%
One property reduces, and the ratio in large scale aperture can also improve in filter cloth, and the particulate matter of 5 μm of turbid solution side or more is more when initial stage filters
Ground can be by filter cloth, and the fine particle of fraction can also penetrate filter cloth, so that clear liquid side becomes muddy, the filter efficiency of filter cloth
It is substantially reduced with precision.In view of filter cloth of the present invention has a higher filtering accuracy, 5 μm of fluid present invention filtration filter cloth with
The ratio in upper aperture preferably 90.0% or more.
Liquid filtering of the invention with filter cloth be organic fiber formed woven fabric, the above-mentioned preferred polyphenylene sulfide of organic fiber
(PPS) fiber, polytetrafluoroethylene (PTFE) fiber, polyphenyl and double oxazole fibers (PBO), polyether-ether-ketone (PEEK), polysulfone fibre
(PS), at least one of polyester fiber (PET), Fypro (PA).In view of use long-term in practical acid or alkali environment
Performance requirement, cost and machinability, more preferable polyphenylene sulfide (PPS) fiber, polyphenylene sulfide fibre have extremely excellent
High temperature resistant, resistance to chemical reagents can be used for a long time at 190 DEG C, can be resistant to almost all of acid at 200 DEG C, most alkali
With the corrosion of organic solvent, it is particularly suitable for using for a long time in high temperature, acid and alkali corrosion environment.
The retention precision and filter cloth pore size of liquid filtering filter cloth of the invention have relationship, the aperture of filter cloth woven fabric
Distribution determines by the structure of filter cloth, form (the close journey between the twist factor of yarn, yarn of the structure of filter cloth by yarn in the fabric
Degree) etc. determine.Constitute the single twist multiplier preferably 200~350 that filter cloth is used in fluid present invention filtering, ply twist multiplier preferably 180
~400.If the single twist multiplier of composition filter cloth is too low, the twist of single thread is too low, and spinning is difficult, it is difficult to resultant yarn, even if
Yarn is loose after resultant yarn, and obtained filter cloth surface filoplume is more, and there are the danger of secondary pollution；If constituting the single thread of filter cloth
If twist factor is excessively high, single thread is close, and the gap of filter cloth increases after weaving, that is, the aperture of filter cloth becomes larger, under filtering accuracy
Drop, it is contemplated that the surface hairiness length and filtering accuracy of filter cloth constitute the single twist multiplier of fluid present invention filtering filter cloth more
It is preferred that 280~320.If the twist factor of strand is too low, the twist of strand is too low, and yarn is loose, and surface hairiness is more, deposits
In the danger of secondary pollution；If the twist factor of strand is excessively high, strand is close, and the gap of filter cloth increases after weaving, filtering
Accuracy decline, it is contemplated that the surface hairiness length and filtering accuracy of filter cloth, the strand for constituting fluid present invention filtering filter cloth are twisted
Coefficient more preferable 300~380.
Fluid present invention filtering thickness preferably 0.4~1.5mm of filter cloth.If the thickness of liquid filtering filter cloth is too low
If, filter cloth is too thin, is installed in device procedures and is easy corrugation, and if filter cloth thickness is lower, easier to be worn by filter material
Thoroughly, the filtering accuracy of filter cloth is caused to decline；If the thickness of liquid filtering filter cloth is blocked up, on the one hand, after filter material blocking
Not easy cleaning, on the other hand, filter cloth thickness improve, and the increased costs used are unfavorable for extensive industry application.
The fluid present invention filtering coverage coefficient preferably 2100~2700 of filter cloth.If the liquid filtering filter cloth covers
If lid coefficient is too low, the tightness of filter cloth is with regard to low, and aperture is with regard to bigger than normal, at this point, in addition to that can penetrate a part of large-size particle
Beyond the region of objective existence, tiny particulate matter can also penetrate filter cloth, so that clear liquid side becomes muddy, substantially reduce the actual filtration essence of equipment
Degree；If the coverage coefficient of liquid filtering filter cloth is excessively high, the tightness of filter cloth is just high, and aperture is with regard to relatively low, at this point, filter
The venting quality of cloth drastically reduces, and in actual use, equipment must can just make filtrate penetrate filter cloth by very big ground pressure,
This necessarily leads to equipment motor overload operation, reduces service life of equipment, also results in the increase of equipment energy consumption, increases and uses
Cost.
Fluid present invention filtering preferably 3~5 grades of filoplume grade of filter cloth surface.If filter cloth surface is used in liquid filtering
Filoplume grade it is too low if, then, since surface hairiness is too long, filter cloth is by the anti-of filter material during actual filtration
Multiple friction, filoplume are easy to fall off, and generate secondary pollution, it is contemplated that and filter cloth of the present invention does not generate secondary pollution during the filtration process,
More preferable 4~5 grades of the filoplume grade of fluid present invention filtration filter cloth.
In the case where measuring pressure 200Pa, fluid present invention filtering venting quality preferably 1~20mm/s of filter cloth.If this hair
If the venting quality of bright liquid filtering filter cloth is excessively high, the fine particle very permeable filter cloth in filter medium, the mistake of filter cloth
Filter precision will substantially reduce；If the venting quality of liquid filtering filter cloth of the invention is too low, during actual filtration,
Equipment operating pressure will sharply increase, and filter efficiency is low, increase equipment use cost.In view of the filtering of filter cloth of the invention
Precision and operational efficiency, the fluid present invention filtering more preferable 2~10mm/s of venting quality of filter cloth.
The manufacturing method of liquid filtering filter cloth of the invention is as follows: being weaved using organic fiber yarn, machine is made
Fabric blank, then woven fabric blank obtained is subjected to concise, thermal finalization, drying, surface-discharge processing, then singed, rolled
Light processing, final finished product.
Organic fiber is specifically passed through into scutching cotton, cotton carding, drafting, rove, spun yarn, winder, doubling, twisting, thermal finalization
Cotton spinning spin, be made number be 3~20s organic fiber yarn, yarn pass through again weight pound rapier loom weaving,
It is made through to density, in 20~200/inch, latitudinal density, will be obtained in the high density woven fabric of 10~150/inch
High-density fabric carries out final finishing processing, and final finishing processing includes concise, thermal finalization, concise product is made, by concise product in low pressure
Or surface-discharge processing is carried out in atmospheric plasma processing equipment, and oxygen-containing hydrophilic radical is introduced, hydrophilic fabrics are made, it will be hydrophilic
Property fabric carry out processing of singing, singing is handled in engineering, and the speed of processing of singing is 25~36m/min, if singing processing
If speed is too low, cloth residence time in flame is too long, and cloth is easily burned out；If the speed for processing of singing is excessively high
Words, surface hairiness are not completely removed, and there are still a large amount of filoplumes, gained filter clothes to be rubbed repeatedly by filter material for fabric surface
It wipes, filoplume is easy to fall off, and generates secondary pollution, and in addition too long filoplume is torn in material friction, it is highly vulnerable to breakage filter cloth structure,
Filter cloth aperture is caused to tear increase, so that the filtering accuracy of filter cloth will be reduced.The fabric that will singe that treated is carrying out calendering
Processing, calendering processing intent, on the one hand, be further reduced the surface hairiness of fabric, so that filter cloth surface is smooth, filter cake is easy-peel
From conducive to anti-cleaning；On the other hand, fabric is handled by calendering, and filter cloth aperture further decreases, conducive to mentioning for filter efficiency
Height, the speed of calendering processing are 2~5m/min, and calendering pressure is 0.5~3.0Mpa, and the temperature of calendering processing is 170~200
℃.If the speed of calendering processing is excessively slow, on the one hand leads to calendering inefficiency, increase processing cost；On the other hand, it rolls
The light velocity is spent slowly, and fabric is high by roll pressed degree, and extrusion time is long, and the aperture of fabric is too low, the venting quality of fabric sharply under
Drop, in a device in actual use, filter press must can just make filtrate through filter cloth by very big ground pressure, this necessarily causes to set
Standby motor overload operates, and reduces service life of equipment, also results in the increase of equipment energy consumption, increases use cost；If rolled
If the excessive velocities of light processing, fabric can run through roll, and the first roll pressed time is short, and one side fabric surface filoplume does not have
There is melting completely to fit in fabric surface, table Mao Zengjia, repeatedly friction of the gained filter cloth by filter material, filoplume is easy de-
It falls, generates secondary pollution, in addition too long filoplume is torn in material friction, is highly vulnerable to breakage filter cloth structure, leads to filter cloth aperture
Increase is torn, so that the filtering accuracy of filter cloth will be reduced, and yarns in worsted fabric is squeezed that degree is small, and gap is big between yarn,
Filtering accuracy reduces, and calendering effect is unobvious.If calendering hypotony, fabric surface filoplume cannot paste volt in knitting completely
Object surface, there are still more filoplumes on surface, and fabric cannot be by roll compacting consolidation, and fabric sleaze, aperture is bigger than normal, and filtering accuracy is low
Under；If calendering hypertonia, fabric roll compacting is crossed and consolidation, and fabric venting quality is low, and equipment operation pressure is higher, efficiency
Lowly, energy consumption increases.If calendering temperature is too low, organic fiber cannot melt submissive and fabric table under temperature, pressure
Face, fabric surface filoplume is more, and there are the danger of secondary pollution；If calendering temperature is excessively high, organic fiber melting is mutual
Viscous glutinous, fabric pore size is low, and equipment operation pressure is higher, and inefficiency causes energy consumption to increase, in addition, temperature is excessively high, fiber holds
Easily melting roll banding, improves difficulty of processing.
By following embodiment, the invention will be further described.But protection scope of the present invention is not limited to embodiment, real
Each physical property in example is applied to be measured by following method.
[twist factor]
According to the testing standard of JIS L-1017-2002 8.4, the twist t of test yarn, unit T/10cm, according to JIS L-
The testing standard of 1017-2002 8.3, the fiber number of test yarn, unit tex,
Yarn twist factor calculation method,
α=t*T^(1/2)
T-the twist/(sheet/10cm)
T-denier count as received (tex).
[coverage coefficient]
The calculation formula of the coverage coefficient of woven fabric is as follows:
,
Wherein: NW: fabric through Xiang Midu (piece/inch)；
DW: through the fineness (dtex) to long filament in fabric；
Nf: the latitudinal density (piece/inch) of fabric；
Df: the fineness (dtex) of broadwise long filament in fabric.
[venting quality]
According to JISL10968.27.1A method, by sample under tension-free state, it is placed on test section, air pressure 200Pa is adjusted, to keep away
Exempt from the repetition of test point, by the oblique movement of sample to obtain the test point of different warps, not suspension when test, every a sample is at least surveyed
Examination 5 times, is averaged.
[thickness]
According to JIS L 1096-1999 8.5, the pressure of test is 23.5kPa (240gf/cm2)。
[surface hairiness grade]
Fabric is folded, in face of visible light chimb at (folding position) villus distribution situation, evaluated according to following situations: 1 grade:
Long filoplume is fine and close, 2 grades: long filoplume is less, 3 grades: long filoplume do not have substantially, 4 grades: only undercoat plumage, and it is relatively neat, 5 grades: surface
It is smooth, no filoplume.Wherein, long filoplume is filoplume of the length in 0.5mm or more；Undercoat plumage is the filoplume that length is less than 0.5mm.
[surface hairiness length]
Test fabric is placed under digit microscope, under 200 multiples, measures the filoplume length of fabric surface, by sample when test
To obtain the test point of different warps, not suspension, every a sample is at least tested 5 times, is averaged for oblique movement.
[fabric pore size distribution]
According to ASTMF316-03 standard, fabric pore size is measured using Capillary Flow porometer, fabric sample is placed on sample room
In, it is soaked with the Si Weike ketone liquid (silwick silicone Fluid) that surface tension is 19.1dynes/cm.Sample room
Bottom clamp has diameter 2.54cm, the porous metals disk plug-in unit with a thickness of 3.175mm, and the top folder of sample room has
The hole of 3.175mm diameter, fabric pore size Distribution Value can directly be read, and take the average value of the pore-size distribution of five measurements.
[through broadwise thread density]
According to JISL10968.6 densimetry, measured with pick glass fabric through latitudinal density.
[filtrate contamination degree]
The polyphenylene sulfide filter cloth of same batch production is taken respectively to take 3 pieces of samples in the leftover of bolt of cloth, cloth, at cloth tail three along 45 ° of directions, point
Ying Yongyu not be in practical filter press, observation penetrates the filtrate situation of filter cloth, and ◎ indicates that filtrate is limpid, pollution-free, and zero indicates filtrate
Limpid, light contamination, △ indicate that filtrate is muddy, obviously pollutes, × indicate that filtrate is muddy, seriously polluted, count each filtrate state
Frequency of occurrence takes the most states of frequency of occurrence, represents the pollution level of filtrate.Wherein, ◎ filtrate is limpid, pollution-free represents filtrate
Solid content is 0.5%) 0~0.5%(does not include；Zero filtrate is limpid, light contamination represents filtrate solid content and do not wrap as 0.5~2.0%(
Containing 2.0%)；△ filtrate is muddy, obvious pollute represents filtrate solid content in 2.0~10.0%(not comprising 10.0%)；× filtrate is muddy
Turbid, the seriously polluted filtrate solid content that represents is more than or equal to 10.0%.The test method of filtrate solid content is as follows: utilizing glass surface
Ware weighs its weight and is denoted as m1, take portion filtrate sample to pour into surface plate, weigh filtrate and surface plate weight is denoted as m2, will fill
It is taken out after thering is the surface plate of filtrate to dry 60min in 102 DEG C of baking ovens, weighs drying rear surface ware and solids weight is denoted as m3,
The calculation formula of filtrate solid content is as follows: filtrate solid content %=[ (m3-m1)/(m2-m1) × 100%.
Embodiment 1
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/4 that ply twist multiplier is 326 are in weight pound rapier loom
It is weaved, the woven fabric that coverage coefficient is 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
Degree is to carry out processing of singing under 30m/min, and singing that treated, fabric is 180 DEG C, carries out calendering under pressure 1.5Mpa in temperature
Processing is made with a thickness of 0.50mm, and the liquid filtering filter cloth that surface hairiness length is 0.08mm measures aperture in the filter cloth and exists
5 μm of ratios below account for 90.5%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 2
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/5 that ply twist multiplier is 364 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.68mm, the liquid filtering filter cloth that surface hairiness length is 0.06mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 86.5%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 3
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/5 that ply twist multiplier is 364 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in atmospheric plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 25m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.69mm, the liquid filtering filter cloth that surface hairiness length is 0.05mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 93.2%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 4
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/5 that ply twist multiplier is 364 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in atmospheric plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 38m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.68mm, the liquid filtering filter cloth that surface hairiness length is 0.39mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 93.2%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 5
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/4 that ply twist multiplier is 326 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in atmospheric plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 0.5Mpa in temperature
Reason is made with a thickness of 0.61mm, the liquid filtering filter cloth that surface hairiness length is 0.18mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 75.1%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 6
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/4 that ply twist multiplier is 326 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in atmospheric plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 2.0Mpa in temperature
Reason is made with a thickness of 0.43mm, the liquid filtering filter cloth that surface hairiness length is 0.05mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 94.1%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 7
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/4 that ply twist multiplier is 326 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 3.0Mpa in temperature
Reason is made with a thickness of 0.40mm, the liquid filtering filter cloth that surface hairiness length is 0.03mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 94.4%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 8
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/4 that ply twist multiplier is 326 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 150 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.51mm, the liquid filtering filter cloth that surface hairiness length is 0.20mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 87.3%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 9
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/4 that ply twist multiplier is 326 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 190 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.50mm, the liquid filtering filter cloth that surface hairiness length is 0.05mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 93.9%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 10
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/4 that ply twist multiplier is 326 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 200 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.48mm, the liquid filtering filter cloth that surface hairiness length is 0.03mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 94.7%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 11
Use single twist multiplier for 261, the polyphenylene sulfide yams for the 20s/5 that ply twist multiplier is 243 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in atmospheric plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.69mm, the liquid filtering filter cloth that surface hairiness length is 0.17mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 87.4%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 12
Use single twist multiplier for 326, the polyphenylene sulfide yams for the 20s/5 that ply twist multiplier is 485 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in atmospheric plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.71mm, the liquid filtering filter cloth that surface hairiness length is 0.04mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 81.4%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 13
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/5 that ply twist multiplier is 364 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 1800 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.61mm, the liquid filtering filter cloth that surface hairiness length is 0.06mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 77.8%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 14
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/5 that ply twist multiplier is 364 are in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2500 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.60mm, the liquid filtering filter cloth that surface hairiness length is 0.07mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 83.4%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 15
Use single twist multiplier for 304, the polyphenylene sulfide yams for the 20s/4 that ply twist multiplier is 326 are in weight pound rapier loom
It is weaved, the woven fabric that coverage coefficient is 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
Degree is to carry out processing of singing under 40m/min, and singing that treated, fabric is 160 DEG C, carries out calendering under pressure 0.3Mpa in temperature
Processing is made with a thickness of 0.65mm, and the liquid filtering filter cloth that surface hairiness length is 0.50mm measures aperture in the filter cloth and exists
5 μm of ratios below account for 75.0%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 16
Use single twist multiplier for 304, the polyester fiber yarn for the 20s/5 that ply twist multiplier is 364 is in weight pound rapier loom
It is weaved, the woven fabric of coverage coefficient 2700 is made, then above-mentioned woven fabric is subjected to concise, thermal finalization, drying, then exists again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
To carry out processing of singing under 30m/min, singing that treated, fabric is 180 DEG C, carries out at calendering under pressure 1.5Mpa in temperature
Reason is made with a thickness of 0.60mm, the liquid filtering filter cloth that surface hairiness length is 0.02mm, measures in the filter cloth aperture in 5 μ
M ratio below accounts for 95.5%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Embodiment 17
Use single twist multiplier for 304, the Fypro yarn for the 20s/5 that ply twist multiplier is 364 is in weight pound rapier loom
On weaved, be made coverage coefficient 2700 woven fabric, then by above-mentioned woven fabric carry out concise, thermal finalization, drying, then again
Surface-discharge processing is carried out in low-voltage plasma processing equipment, to surface-discharge treated fabric with speed in equipment of singing
Degree is to carry out processing of singing under 30m/min, and singing that treated, fabric is 180 DEG C, carries out calendering under pressure 1.5Mpa in temperature
Processing is made with a thickness of 0.58mm, and the liquid filtering filter cloth that surface hairiness length is 0.01mm measures aperture in the filter cloth and exists
5 μm of ratios below account for 95.8%.Each physical property of fluid present invention filtering filter cloth is evaluated referring to the following table 1.
Application of the resulting liquid filtering filter cloth of embodiment 1-17 in filter press filter element.
Comparative example 1
Using single twist multiplier 304, the polyphenylene sulfide yams of the 20s/4 of ply twist multiplier 326 carry out in weight pound rapier loom
Weaving is made the woven fabric of coverage coefficient 2700, then above-mentioned woven fabric is carried out concise, thermal finalization, then again to concise, hot fixed
Fabric after type carries out surface-discharge processing in low-voltage plasma processing equipment, is made with a thickness of 0.74mm, surface hairiness is long
The liquid filtering filter cloth that degree is 1.50mm, measures in the filter cloth aperture in 5 μm of ratios below and accounts for 58.0%.Evaluate the liquid
Each physical property of filtering filter cloth is referring to the following table 2.
Comparative example 2
Using single twist multiplier 304, the polyphenylene sulfide yams of the 20s/4 of ply twist multiplier 326 carry out in weight pound rapier loom
Weaving is made the woven fabric of coverage coefficient 2700, then above-mentioned woven fabric is carried out concise, thermal finalization, then again to concise, hot fixed
Fabric after type carries out surface-discharge processing in low-voltage plasma processing equipment, and to surface-discharge, treated that fabric is being singed
Processing of singing is carried out for 36m/min with speed in equipment, is made with a thickness of 0.73mm, surface hairiness length is the liquid of 0.19mm
Filtering filter cloth, measures in the filter cloth aperture in 5 μm of ratios below and accounts for 55.6%.Evaluate each object of the liquid filtering filter cloth
Property is referring to the following table 2.
Table 1
Table 2
Note: ◎ filtrate is limpid, pollution-free zero filtrate is limpid, light contamination △ filtrate is muddy, obvious pollution × filtrate is muddy,
It is seriously polluted.
According to upper table, polyphenylene sulfide yams number is big by embodiment 1,2 it is found that under equal conditions, in embodiment 2, strand
Twist factor is bigger, and resulting 5 μm of ratios below in polyphenylene sulfide woven fabric filter cloth aperture are low, therefore the venting quality of filter cloth is high, warp
Limpid, light contamination degree, filtering accuracy are higher in filtrate for the filtered clear liquid side of filter cloth.
By embodiment 2,3,4 it is found that under equal conditions, polyphenylene sulfide woven fabric blank is singed excessive velocities in embodiment 4,
Gained polyphenylene sulfide woven fabric filter cloth surface filoplume length is long, therefore the filoplume grade of filter cloth surface is low, after filter-cloth filtering
Clear liquid side is muddy in filtrate, the degree that obviously pollutes, filtering accuracy is lower.
By embodiment 1,5,6,7 it is found that under equal conditions, polyphenylene sulfide woven fabric blank calendering pressure is big in embodiment 7,
Resulting polyphenylene sulfide woven fabric filter cloth thickness is low, and surface hairiness length is short, and 5 μm of aperture ratio below is high, therefore filter cloth
Venting quality it is low, limpid, free of contamination degree, filtering accuracy are high in filtrate for clear liquid side after filter-cloth filtering.
By embodiment 1,8,9,10 it is found that under equal conditions, polyphenylene sulfide woven fabric blank calendering temperature in embodiment 10
Height, resulting polyphenylene sulfide woven face filoplume length is short, and 5 μm of aperture ratio below is high, therefore the venting quality of filter cloth
Low, limpid, free of contamination degree, filtering accuracy are high in filtrate for the clear liquid side after filter-cloth filtering.
By embodiment 2,11,12 it is found that under equal conditions, the ply twist multiplier mistake of polyphenylene sulfide yams in embodiment 12
Height, resulting 5 μm of ratios below in polyphenylene sulfide woven fabric filter cloth aperture are low, therefore the venting quality of filter cloth is high, through filter cloth mistake
The degree that stillness of night side after filter is in filtrate muddiness, obviously pollutes, filtering accuracy are lower.
By embodiment 2,13,14 it is found that under equal conditions, polyphenylene sulfide woven fabric blank coverage coefficient mistake in embodiment 13
Low, resulting 5 μm of ratios below in polyphenylene sulfide woven fabric filter cloth aperture are low, therefore the venting quality of filter cloth is high, through filter cloth mistake
The degree that stillness of night side after filter is in filtrate muddiness, obviously pollutes, filtering accuracy are lower.
By embodiment 1,15 it is found that under equal conditions, in embodiment 15 polyphenylene sulfide woven fabric blank singe excessive velocities,
Calendering pressure is too small, calendering temperature is too low, and the surface hairiness length of resulting polyphenylene sulfide machine filter cloth is long, and 5 μm of aperture or less
Ratio it is low, therefore the venting quality of filter cloth is high, and the clear liquid side after filter-cloth filtering is muddy in filtrate, the degree that obviously pollutes,
Filtering accuracy is lower.
By embodiment 2,16,17 it is found that under equal conditions, using filter cloth made from polyphenylene sulfide fibre, filter in embodiment 2
The cloth replacement cycle is 5 months, service life longest.
By embodiment 1 and comparative example 1 it is found that under equal conditions, polyphenylene sulfide woven fabric blank is without burning in comparative example 1
Hair, calendering processing, resulting polyphenylene sulfide woven fabric filter cloth surface filoplume length is very long, and 5 μm of aperture ratio below is too low, because
The venting quality of this filter cloth is high, and muddy, seriously polluted degree, filtering accuracy are low in filtrate for the clear liquid side after filter-cloth filtering.
By embodiment 1 and comparative example 2 it is found that under equal conditions, polyphenylene sulfide woven fabric blank is without rolling in comparative example 2
Light processing, resulting polyphenylene sulfide woven fabric filter cloth surface filoplume length is long, too low under the ratio below of 5 μm of aperture, therefore filters
The venting quality of cloth is high, and muddy, seriously polluted degree, filtering accuracy are low in filtrate for the clear liquid side after filter-cloth filtering.
Claims (10)
1. a kind of liquid filtering filter cloth, it is characterised in that: the filter cloth is the woven fabric formed by organic fiber, the filter cloth surface
Filoplume length in 0.50mm hereinafter, aperture at 5 μm below accounts for 75.0% or more in the filter cloth.
2. liquid according to claim 1 filtering filter cloth, it is characterised in that: the single twist multiplier for constituting the filter cloth is
200~350, ply twist multiplier is 180~400.
3. liquid filtering filter cloth according to claim 1, it is characterised in that: the organic fiber is that polyphenylene sulfide is fine
Dimension, polytetrafluoroethylene fibre, polyphenyl and double oxazole fibers, polyetheretherketonefiber fiber, polysulfone fibre, polyester fiber, Fypro
At least one of.
4. liquid according to claim 1 or 2 filtering filter cloth, it is characterised in that: the filter cloth with a thickness of 0.4~
1.5mm。
5. liquid filtering filter cloth according to claim 1 or 2, it is characterised in that: the coverage coefficient of the filter cloth is 2100
~2700.
6. liquid filtering filter cloth according to claim 1 or 2, it is characterised in that: in the case where measuring pressure 200P, the filter cloth
Venting quality be 1~20mm/s.
7. the manufacturing method that filter cloth is used in a kind of liquid filtering described in claim 1, it is characterised in that: use organic fiber yarn
It is weaved, woven fabric blank is made, then concise, thermal finalization, surface-discharge are handled by woven fabric blank obtained progress, then into
Row is singed, calendering is handled, final finished product.
8. the manufacturing method that filter cloth is used in liquid filtering according to claim 7, it is characterised in that: the speed of singing is 25
~36m/min.
9. the manufacturing method that filter cloth is used in liquid according to claim 7 filtering, it is characterised in that: the calendering temperature is
170~200 DEG C, calendering pressure is 0.5~3.0Mpa.
10. a kind of application of liquid filtering filter cloth described in claim 1 in filter press filter element.
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| CN110221087A (en) * | 2019-07-01 | 2019-09-10 | 山东黄金集团有限公司 | A kind of gold mine tailing slurry is automatic to filter dewatering test macro and method |
| CN111676565A (en) * | 2020-06-22 | 2020-09-18 | 安徽省太和县众友筛网滤布制造有限公司 | Extension-resistant tensile high-performance industrial filter cloth and preparation method thereof |
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| CN112127151A (en) * | 2020-09-08 | 2020-12-25 | 罗莱生活科技股份有限公司 | Waterproof, oil-proof, antifouling and anti-mite textile as well as preparation method and application thereof |
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