CN101716442A - Industrial filtering cloth used for liquid filter and application - Google Patents
Industrial filtering cloth used for liquid filter and application Download PDFInfo
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- CN101716442A CN101716442A CN200810155622A CN200810155622A CN101716442A CN 101716442 A CN101716442 A CN 101716442A CN 200810155622 A CN200810155622 A CN 200810155622A CN 200810155622 A CN200810155622 A CN 200810155622A CN 101716442 A CN101716442 A CN 101716442A
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- filter cloth
- cloth
- filtering cloth
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- filter
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Abstract
The invention discloses an industrial filtering cloth used for liquid filter and application. The filtering cloth takes polytetrafluoroethylene fibers as raw material fibers. The product of the invention has the properties of high-temperature resistance, corrosion resistance to acid and alkali, chemical reagent resistance, and steaming resistance, and has favorable filtering effect and excellent mechanical performance; the invention can enlarge application range of the filtering cloth and further improve service life of the filtering cloth; and the filtering can be widely applied to the liquid filter in the fields of chemical engineering or water treatment and the like.
Description
Technical field
The present invention relates to a kind of industrial filter cloth, belong to the filtration and separation techniques field, is a kind of filter medium, specifically a kind of industrial filter cloth that is used for liquid filtering.
Background technology
Filter medium is the extremely important part of filter, is considered to the heart of filter.Filter cloth plays an important role in the isolated by filtration process as a kind of widely used filter medium, directly influences filter effect.And the material of filter cloth, to the performance of filter cloth decisive role again, existing filter cloth is by the material classification, and a class is a natural fiber, as cotton, hair, silk, flaxen fiber; Another kind of is chemical synthetic fiber, as terylene, polyamide fibre, polypropylene fibre, polyvinyl etc., and the main filter cloth of four kinds of materials for this reason of the product that present domestic production producer provides; Also has inorfil, as metallic fiber, carbon fibre etc.Progress along with society, industrial expansion, more and more higher as fields such as mining industry, chemical industry, food, environmental protection to the requirement of liquid filtering technology, and then it is more and more higher to the requirement of filter cloth, this is not only filter cloth weaving process and back process technology is proposed higher requirement, the more important thing is that the performance to fibrous material proposes higher requirement, existing common material filter cloth can not satisfy the instructions for use in some particular surroundings fully.The chemical property (Acidity of Aikalinity) and the temperature conditions of work material directly have influence on service life of filter cloth.That is to say that these two environmental conditions of Acidity of Aikalinity and temperature have determined the problem of drawing materials of filter cloth.
At present, the main chemical property of common chemical synthetic fibers filter cloth is as follows on the market: Polypropylene: the safe handling temperature is below 100 ℃, and energy acid and alkali resistance and strong oxidizer corrode and microbial action, but can be dissolved in dimethylbenzene, in the tetrachloroethane solvent.Polyamide fabric: better heat stability, general serviceability temperature can be at 120-150 ℃, and the chemical stability in alkaline filter pulp is better, can use 100 ℃, but in acid medium, then has only at normal temperatures, and the diluted acid material is just had stability.Woven dacron: kind is a lot, is widely used, and the chemical stability aspect can acid corrosion-resistant, and the alkali resistance aspect is poor slightly, can only anti-weak base, microbial action also there is high resistance, 120 ℃ of hear resistance temperature.Polyvinyl cloth: have excellent alkaline resistance properties, acid resistance not, heatproof is lower, and reaching 100 ℃ just has contraction.
Summary of the invention
The objective of the invention is to overcome the existing narrow defective of the filter cloth raw material scope of application, polytetrafluoroethylene fibre is applied to the liquid filtration media field, a kind of high temperature resistant, acid-alkali-corrosive-resisting, good filtration effect and superior industrial filter cloth and the purposes that is used for liquid filtering of mechanical performance are provided.
Technical solution of the present invention is:
A kind of filter cloth that is used for liquid filtering, selected raw fibre are polytetrafluoroethylene fibre, are called for short the PTFE fiber.
The brief introduction of polytetrafluoroethylene (PTFE) fiber:
The chemical constitution formula:
1. hear resistance heat-resistant
327 ℃ of melting points, 260 ℃ of serviceability temperatures commonly used.
Can deterioration under steam condition.
2. resistance to chemical reagents
For chemicals such as alkali, acid, organic solvents, all be stable basically.
3. flame retardancy
Limited oxygen index LOI=34 can not burn under common oxygen content.
The excellent properties of polytetrafluoroethylene fibre can make the filter cloth of its production, in filtration applications, satisfy the use under multiple adverse circumstances, especially have the very strong acid and alkali resistance and the performance of organic solvent, normal serviceability temperature can reach 260 ℃, it has superpower heat-resistant performance, even also can keep 90% intensity under the HCS condition.
Secondly, the raw material of formation filter cloth can be polytetrafluoroethylene (PTFE) monofilament or short fiber.Polytetrafluoroethylene (PTFE) monofilament fineness scope is 5.0dtex-50dtex, also is used for woven fabric, the preferred 7.0dtex-16.0dtex of fineness behind the synthetic filaments.Polytef flocks fineness scope is 1.0dtex-10dtex, and preferred 1.6dtex-7.6dtex is used for woven fabric after can spinning or direct combing is used for non-weaving cloth.Adopt the PTFE fiber and the yarn of different fineness can play different filter effects.Long filament is by multifilament and closes and form that monofilament is the single continuous long fibre of being made by synthetic fibers, and the filter cloth that is made into by long filament has high intensity and the good cake performance of unloading, and in addition can handle thinner particle.PTFE filament fineness scope is 100dtex-6000dtex, preferred 222dtex-1333dtex.Spun yarn is that the method by short fiber utilization spinning makes fiber alignment, twisting form continuous slender body, and the spun yarn filter cloth that is made into by this yarn has extremely excellent mechanical performance, and the particle cutoff performance is good, and it is higher to hold back under the effect transmitance on an equal basis.PTFE spun yarn fineness scope is 200dtex-1600dtex, preferred 380dtex-800dtex.The bubbling point scope of PTFE filter cloth is 10 μ m～500 μ m, is preferably 10～100 μ m.Average flow aperture scope is 0.1 μ m～400 μ m, is preferably 5 μ m～100 μ m.Difference according to filtrate is filtered the filter cloth that requirement can be selected different bubble points and average flow aperture for use.
Once more, the institutional framework of filter cloth, architectural features such as yarn specification and fibre fineness have directly determined the pore size of filter cloth, the porosity of filter cloth has also just determined the strainability of filter cloth.According to different purposes needs, can select different fabric constructions for use, as woven fabric (plain weave, twill-weave, satin weave, Dutch weave), non-weaving cloth and composite construction thereof.For satisfying excellent brute force and dimensional stability, preferred woven fabric and composite construction filter cloth.The plain weave filter cloth has good dimensional stability, and structure is fine and close, and hole is little, so the particle cutoff performance is good, and filtrate clarity height, long service life; The hole maximum of satin weave filter cloth, resistivity is little, be difficult for to stop up, and it is good to unload the cake ability; Every performance of twill-weave filter cloth is placed in the middle, and friction resistant is very capable, and the rate of filtration is also big, longest-lived, thereby be widely used; The diameter of Holland's weave filter cloth middle longitude and parallel is different, can produce two kinds of passages and hole in fabric, a kind of is that second kind is the tri-angle-holed or tear-drop shaped hole on filter cloth surface between the two parallel yarns of surface, this filter cloth is specially adapted to crystal and filters, easily regeneration.The fibr tissue of non-woven class filter cloth be not rule but mixed and disorderly and closely arrange, have three-dimensional space, belong to in-depth filtration, good to the cutoff performance of colloidal particle.The composite construction filter cloth is to filter requirement at difference, combines the performance advantage of different structure filter cloth, and fabric construction identical or different more than 2 layers is compound or to add other functional material compound.As two-layer composite filter cloth, sandwich structure filter cloth etc.Can improve the rejection of particle, the rippability of filter cake and the discharge ability of filtrate etc.With the sandwich structure filter cloth is example: bilevel short fiber layers since fibr tissue be not rule but mixed and disorderly and closely arrange, so it is poor that its intensity and anti-wear performance are compared with the woven filter cloth that is made into fiber of the same race, but the three-dimensional space that it has has determined it to have good strainability; The PTFE spun yarn plain cloth in intermediate layer has good dimensional stability and mechanical performance.Therefore both combinations make this compound filter cloth not only have excellent high temperature resistant, resistance to chemical attack, play good isolated by filtration effect, also have good dimensional stability and mechanical performance.
In addition, for strainability and the mechanical performance of improving filter cloth, can also carry out post processing to filter cloth, (discharge filter cloth stress as thermal finalization, reducing filter cloth shrinks, raising filter cloth stability), calendering (makes the filter cloth smooth surface, increase particle trapping efficient and unload the cake ability), singe (the burning-off fine, soft fur is mainly used in the short fiber filter cloth), preshrunk water treatment (improving the shape stability of filter cloth), extend and handle (guaranteeing that strainer is bilateral parallel), face coat (as applying polyurethane, poly tetrafluoroethylene etc.) etc.
Advantage of the present invention: filter cloth provided by the invention has high temperature resistant, acid-alkali-corrosive-resisting, resistance to chemical reagents, heat-resistant, good filtration effect and the superior premium properties of mechanical performance.Gao Wen Time at 150 ℃～190 ℃ also has the very strong acid and alkali resistance and the performance of organic solvent, and serviceability temperature commonly used can reach 190 ℃, has superpower heat-resistant performance, also can keep 90% intensity under 160 ℃ of high pressure.Therefore can satisfy the application requirements under the multiple adverse circumstances, enlarge the range of application of filter cloth, and the service life of further improving filter cloth.
The specific embodiment
The present invention will further specify the present invention with the following example, but protection scope of the present invention is not limited to embodiment.
The assay method of each rerum natura of filter cloth is as follows:
[density]
According to JIS L 1,096 8.6 densimetrys, with pick glass measure fabric through filling density.
[thickness]
According to JIS L 1,096 8.5 thickness methods, the pressure of test is 23.5kPa (240gf/m
2).
[grammes per square metre]
According to JIS L 1096 8.4.2 methods, 3 of the experiment slices of clip 20cm * 20cm under standard state, each calls its quality in the following text in standard state, according to grammes per square metre=mass/area, obtains the grammes per square metre of every experiment slice, averages again.
[venting quality]
According to JIS L 1096 8.27.1 A methods, sample under tension-free state, is placed on the test section, regulate air pressure 200Pa, for avoiding the repetition of test point, during test with sample oblique move to obtain different from, the test point of suspension not, each sample is tested 5 times at least, averages.
[tensile property]
According to JIS L 1096 8.12.1 A methods (base cloth pulls the limit method), for general fabrics, the laboratory sample sample size is 5.0cm * 30cm, pulls the yarn of identical radical from the both sides on limit, makes residue laboratory sample fabric width satisfy regulation fabric width: 5cm.On the stretching experiment machine, with clamp clamps sample two ends, the chuck spacing is 20cm, under the speed of constant speed 20cm/min, and ultimate strength when working sample is broken and percentage elongation, every group of sample at least 3 times averaged.
[bubbling point measurement]
According to the general guide of ASTM F316-03, use the Capillary Flow porometer to measure bubbling point and average flow aperture.Sample film is placed in the sample room, is that the Si Weike silicone fluid (silwick silicone Fluid) of 19.1dynes/cm is wetting with surface tension.It is 2.54cm that the bottom folder of sample room has diameter, and thickness is the porous metals dish plug-in unit of 3.175mm, and the top folder of sample room has the hole of 3.175mm diameter.The value in expression bubbling point and average flow aperture is the mean value of twice measurement.
Embodiment 1
Use the fineness formed as the polytetrafluoroethylene (PTFE) monofilament of 7.4dtex by fineness long filament (Dongli Ltd.'s system) as 444.4dtex-60f, utilize water-jet loom to be made into the satin weave filter cloth, be respectively 320/10cm, 219/10cm through weft count, thickness is 0.43mm, and grammes per square metre is 288g/m
2
Gained chain cloth performance parameter: ultimate strength is warp-wise 845N/5cm, broadwise 580N/5cm.Elongation at break is a warp-wise 25.0%, broadwise 22.0%.Venting quality is 20L/m
2S (200Pa).The bubbling point aperture is 24.29 μ m, and the average flow aperture is 11.77 μ m.
The gained filter cloth can be widely used in the liquid filtering in fields such as chemical industry or water treatment.
Embodiment 2
Use fineness to be 3.3dtex, length polytef flocks (Dongli Ltd.'s system) as 70mm, obtain the yarn that fineness is 715.8dtex and 1130.0dtex through spinning process, respectively as warp thread and weft yarn, utilize rapier loom to be made into the plain weave filter cloth, filter cloth after weaving is carried out thermal finalization post processing processing, condition is: 85 ℃ of temperature, batching speed 15m/min.Obtain being respectively 234/10cm, 150/10cm through weft count, thickness is 0.61mm, and grammes per square metre is 540g/m
2Filter cloth.
Gained chain cloth performance parameter: ultimate strength is warp-wise 995N/5cm, broadwise 1008N/5cm.Elongation at break is a warp-wise 25%, broadwise 22%.Venting quality is 112.6L/m
2S (200Pa).The bubbling point aperture is 61.53 μ m, and the average flow aperture is 23.2 μ m.
The gained filter cloth can be widely used in the liquid filtering in fields such as chemical industry or water treatment.
Embodiment 3
A kind of composite construction filter cloth, with fibre fineness is that 1.8dtex, length are the polytef flocks (Dongli Ltd.'s system) of 51mm, be carded to fleece through the following step: fiber bundle-shredding-combing defibre-fleece, as the fleece of two filter layers up and down.PTFE spun yarn plain cloth as middle one deck base cloth layer, use the PTFE short fiber of fineness as 3.3dtex, obtain the yarn that fineness is 600dtex through spinning process, utilize rapier loom to be made into the plain weave filter cloth, be respectively 220/10cm, 165/10cm through weft count.Stack gradually according to fleece-plain cloth-fibroreticulate order, the mode by acupuncture combines.At last, obtain grammes per square metre 520g/m
2, the composite construction filter cloth of thickness 2.0mm.
Gained composite construction chain cloth performance parameter: ultimate strength is warp-wise 706N/5cm, broadwise 1177N/5cm.Elongation at break is a warp-wise 43.0%, broadwise 48.0%.Venting quality is 260L/m
2S (200Pa).The bubbling point aperture is 23.09 μ m, and the average flow aperture is 10.38 μ m.
The gained filter cloth can be widely used in the liquid filtering in fields such as chemical industry or water treatment.
Claims (6)
1. industrial filter cloth that is used for liquid filtering, it is characterized in that: the used raw fibre of this filter cloth is a polytetrafluoroethylene fibre.
2. the industrial filter cloth that is used for liquid filtering according to claim 1 is characterized in that: this filter cloth can be woven fabric, non-weaving cloth or woven fabric and nonwoven composite.
3. the industrial filter cloth that is used for liquid filtering according to claim 1 and 2 is characterized in that: described polytetrafluoroethylene fibre is meant polytetrafluoroethylene (PTFE) monofilament or polytef flocks.
4. the industrial filter cloth that is used for liquid filtering according to claim 3 is characterized in that: described polytetrafluoroethylene (PTFE) monofilament fineness scope is 5.0dtex-50dtex.
5. the industrial filter cloth that is used for liquid filtering according to claim 3 is characterized in that: described polytef flocks fineness scope is 1.0dtex-10dtex.
6. the application of the described industrial filter cloth of claim 1 in the preparation liquid filtration material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810155622A CN101716442A (en) | 2008-10-10 | 2008-10-10 | Industrial filtering cloth used for liquid filter and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810155622A CN101716442A (en) | 2008-10-10 | 2008-10-10 | Industrial filtering cloth used for liquid filter and application |
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| Publication Number | Publication Date |
|---|---|
| CN101716442A true CN101716442A (en) | 2010-06-02 |
Family
ID=42431136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810155622A Pending CN101716442A (en) | 2008-10-10 | 2008-10-10 | Industrial filtering cloth used for liquid filter and application |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101869793A (en) * | 2010-06-04 | 2010-10-27 | 宋朋泽 | Polyfluortetraethylene fiber filter material and preparation method thereof |
| CN102433761A (en) * | 2011-09-26 | 2012-05-02 | 无锡泰达纺织科技有限公司 | Filter cloth with multi-layer compound textile |
| CN105561677A (en) * | 2016-02-02 | 2016-05-11 | 浙江严牌过滤技术股份有限公司 | Manufacturing method for monofilament woven filter cloth |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109691A (en) * | 1993-04-05 | 1995-10-04 | 达金工业株式会社 | Polytetrafluoroethylene fiber, cottony material containing the same, and process for producing the same |
| CN1676688A (en) * | 2004-03-09 | 2005-10-05 | 宇明泰化工股份有限公司 | Polytetrafluoroethylene fiber and method for manufacturing the same |
| CN1767882A (en) * | 2003-03-31 | 2006-05-03 | 东丽株式会社 | Filtering material |
| CN2899906Y (en) * | 2006-05-18 | 2007-05-16 | 上海市凌桥环保设备厂有限公司 | Polytetrafluorethylene cloth bag filter material |
| CN1982523A (en) * | 2005-12-16 | 2007-06-20 | 厦门三维丝环保工业有限公司 | Production of needled filtering felt of polytef fibre |
| CN101032674A (en) * | 2006-03-08 | 2007-09-12 | 东丽纤维研究所（中国）有限公司 | Filtering material of thermal stability and the purpose thereof |
-
2008
- 2008-10-10 CN CN200810155622A patent/CN101716442A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109691A (en) * | 1993-04-05 | 1995-10-04 | 达金工业株式会社 | Polytetrafluoroethylene fiber, cottony material containing the same, and process for producing the same |
| CN1767882A (en) * | 2003-03-31 | 2006-05-03 | 东丽株式会社 | Filtering material |
| CN1676688A (en) * | 2004-03-09 | 2005-10-05 | 宇明泰化工股份有限公司 | Polytetrafluoroethylene fiber and method for manufacturing the same |
| CN1982523A (en) * | 2005-12-16 | 2007-06-20 | 厦门三维丝环保工业有限公司 | Production of needled filtering felt of polytef fibre |
| CN101032674A (en) * | 2006-03-08 | 2007-09-12 | 东丽纤维研究所（中国）有限公司 | Filtering material of thermal stability and the purpose thereof |
| CN2899906Y (en) * | 2006-05-18 | 2007-05-16 | 上海市凌桥环保设备厂有限公司 | Polytetrafluorethylene cloth bag filter material |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101869793A (en) * | 2010-06-04 | 2010-10-27 | 宋朋泽 | Polyfluortetraethylene fiber filter material and preparation method thereof |
| CN101869793B (en) * | 2010-06-04 | 2012-05-30 | 宋朋泽 | Polyfluortetraethylene fiber filter material and preparation method thereof |
| CN102433761A (en) * | 2011-09-26 | 2012-05-02 | 无锡泰达纺织科技有限公司 | Filter cloth with multi-layer compound textile |
| CN102433761B (en) * | 2011-09-26 | 2013-06-05 | 无锡泰达纺织科技有限公司 | Filter cloth with multi-layer compound textile |
| CN105561677A (en) * | 2016-02-02 | 2016-05-11 | 浙江严牌过滤技术股份有限公司 | Manufacturing method for monofilament woven filter cloth |
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Application publication date: 20100602 |