CN101920138A - Filtering material and application thereof - Google Patents
Filtering material and application thereof Download PDFInfo
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- CN101920138A CN101920138A CN2010101850289A CN201010185028A CN101920138A CN 101920138 A CN101920138 A CN 101920138A CN 2010101850289 A CN2010101850289 A CN 2010101850289A CN 201010185028 A CN201010185028 A CN 201010185028A CN 101920138 A CN101920138 A CN 101920138A
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- filtering material
- filtering
- polyphenylene sulfide
- fineness
- fabric
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Abstract
The invention discloses a filtering material and application thereof. The filtering material comprises at least one layer of fabric which contains polyphenylene sulfide fibers, wherein a bubble point ranges from 10 to 500mu m; and an average flowing aperture is 0.1 to 400mu m. The products of the invention have high temperature and medicament resistance, good filtering effect and excellent mechanical property, and can enlarge the application range of filtering cloth and further prolong the service life of the filtering cloth. The filtering cloth can be widely applied to liquid filtering in the fields, such as chemical industry, water treatment and the like, and is mainly used for the liquid filtering in a production process of pure terephthalic acid (PTA) or terephthalic acid (TPA).
Description
Technical field
The present invention relates to a kind of filtering material and uses thereof.
Background technology
At present, the employed filter material of filter core in general liquid filtering industry mostly be polypropylene fibre (PP), terylene (PET), polyamide fibre (NYLON) fabric etc., but the filtering material of these materials exists intensity lower, the shortcoming of not wear-resisting, non-refractory; In the high temperature filtration industry, inorganic filter medium and organic filter medium are arranged, based on polytetrafluoroethylene (PTFE), CTFE (PCTFE), flux is little, the defective of the unequal aspect of pore-size distribution but it exists based on glass fibre, organic media for inorganic medium.Because now in terephthalic acid (TPA) and p-phthalic acid's manufacture process, condition is comparatively harsh, the temperature height, corrosivity is stronger, so need to use high temperature resistant, corrosion resistant liquid filtration material, the filtering material that uses generally is ethylene-tetrafluoroethylene copolymer (ETFE), meltability tetrafluoroethene (PFA), tetrafluoroethene and hexafluoropropylene copolymer materials such as (FEP) at present, but these materials are in filter process, wearing and tearing easily, the material replacement cycle is short, strainability can not satisfy the production demand, and cost is higher.
Chinese patent CN101244353 discloses a kind of glass-fluorine complex fire resistant filter material and manufacture method thereof, and its composition comprises woven cloth of special high temperature-resistant glass fibre and PTFE web; Though this filtering material mechanical strength height, percentage elongation is low, because its wearability is not high and the shortcoming of aperture inhomogeneity, can not be adapted to the filtering material requirement that terephthalic acid (TPA) and p-phthalic acid's manufacture process are used.
Summary of the invention
The present invention proposes in view of the problem of above-mentioned existence, and its purpose is to provide a kind of filtering material that is used for making p-phthalic acid and terephthalic acid (TPA) process high temperature resistant, decay resistance that has.
Filter used material as high-temp liquid, must be resistant to elevated temperatures, the filtering material that preferably contains polyphenylene sulfide (be called for short PPS), meta-aromatic polyamide (meta-aramid), polytetrafluoroethylene (PTFE) (being called for short PTFE), poly-phthalimide, glass fibre etc. more preferably contains the filtering material of the good PPS fiber of hear resistance and chemical proofing.
Technical solution of the present invention is as follows:
A kind of filtering material, this filtering material comprises the fabric that one deck contains the PPS fiber at least, and the PPS fiber here is the 90wt% of its component unit or contains more than the 90wt%-(C
6H
4-S)
nThe material that the polymer of the phenylene sulfide construction unit of-expression constitutes; This fabric comprises woven fabric, knitted fabric, nonwoven; The bubbling point scope of this filtering material (being filter cloth) is 10～500 μ m, preferred 10～100 μ m.Average flow aperture scope is 0.1～400 μ m, preferred 5～100 μ m.The filter cloth of the preferable range in this bubbling point and average flow aperture has the ability that can handle most of fineness particle in the filtrate, and the particle cutoff performance is good.Difference according to filtering material is filtered the filter cloth that requirement can be selected different bubble points and average flow aperture for use.
Fabric of the present invention is formed by the PPS monofilament, and this filament diameter is 1～200 μ m, considers by the formed filter cloth of PPS monofilament to have higher intensity and the good cake performance of unloading, and possesses the ability of processing than fine particle, preferred 5～120 μ m of PPS filament diameter.
Fabric of the present invention is that the pure polyphenylene sulfide multifilament of 50～2000dtex is made by fineness, or fineness is mixing fine formed multifilament by in polyphenylene sulfide and polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer, meltability tetrafluoroethene, the hexafluoropropylene copolymer one or more and making of 50～2000dtex.
Fabric of the present invention is that the pure polyphenylene sulfide spun yarn of 0.5～10dtex is made by fineness, or is that in the polyphenylene sulfide of 0.5～10dtex and polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer, meltability tetrafluoroethene, the hexafluoropropylene copolymer one or more mix fine formed short-term yarns and make by fineness.
Adopt the PPS 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.
Fabric is 0.5～10dtex by fineness, the pure PPS short fiber of preferred 1.0～8.5dtex, or one or more blending among PPS and PTFE, ETFE, PFA, the FEP and the spun yarn that generates form.
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.
Contained PPS fiber in the fabric, its section are the special-shaped section of triangle, blade profile, cross, matrix pattern, polygonal, ellipse or platypelloid type.
The filter cloth that utilizes the PPS fiber yarn in identical or different cross section to be made into has excellent strainability.
Filtering material of the present invention, the application of the liquid filtration material in preparation p-phthalic acid (PTA) or terephthalic acid (TPA) (TPA) production process.
Once more, the institutional framework of filter cloth, yarn specification and fibre fineness etc. directly determine the pore size of filter cloth, the porosity of filter cloth, thus the strainability of decision filter cloth.According to different purposes needs, can select different fabric shapes for use, as woven fabric (plain weave, twill-weave, satin weave, Dutch weave), knitted fabric, nonwoven and composite construction thereof.Be satisfied excellent brute force and dimensional stability, preferred woven fabric, wherein 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, 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, is applicable to that crystal filters, and is renewable.The fibr tissue of non-woven class filter cloth is not regular, but mixed and disorderly and compact arranged, has three-dimensional space, belongs to in-depth filtration, and is 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 shape identical or different more than 2 layers is compound or compound with other functional material, 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., 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.
That filter cloth provided by the invention has is high temperature resistant, acid-alkali-corrosive-resisting, drug-resistant, heat-resistant, good filtration effect and the superior premium properties of mechanical performance.And filtering material provided by the invention is compared with other filtering materials in filter process, has ultimate strength height, long service life, the advantage that cost is low.
The specific embodiment
By following examples, the present invention is described in further detail, but the present invention is not subjected to the restriction of these embodiment.
Each rerum natura in embodiment and the comparative example is measured by following method.
[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.
[tensile property]
According to JIS L 1096 8.12.1A methods (base cloth pulls the limit method), for woven fabric, the laboratory sample sample size is 5.5cm * 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.
According to JIS L 1096 8.12.1B methods, for knitted fabric, nonwoven, the laboratory sample sample size is 5.0cm * 30cm.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.
Wherein: L
1Folder distance when being sample breakage; L
0Be the folder distance of experimental test when beginning.
[bubbling point and average flow aperture]
According to the ASTMF316-03 standard, adopt 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
With average fibre diameter is that the PPS monofilament (Dongli Ltd.'s system) of 36 μ m carries out warping, adopt 2235/10cm of warp count, 1948/10cm of weft count, being organized as 1/3 twill weaves, make the PPS monofilament twills of 2127/10cm of warp count, 1925/10cm of weft count, the gained fabric can be used as filtering material, is applied to the liquid filtering in PTA or the TPA production process.Estimate the characteristic of this filtering material, and be shown in Table 1.
Embodiment 2
With average fibre diameter is that the PPS monofilament (Dongli Ltd.'s system) of 120 μ m carries out warping, adopt 800/10cm of warp count, 660/10cm of weft count, being organized as 1/3 twill weaves, make the PPS monofilament twills of 766/10cm of warp count, 650/10cm of weft count, the gained fabric can be used as filtering material, is applied to the liquid filtering in PTA or the TPA production process.Estimate the characteristic of this filtering material, and be shown in Table 1.
Embodiment 3
With the fiber total fineness is that 220dtex*6, filament diameter are that the PPS long filament (Dongli Ltd.'s system) of 7 μ m carries out warping, adopt 173/10cm of warp count, 118/10cm of weft count, being organized as 1/1 plain weave weaves, make the PPS long filament plain cloth of 184/10cm of warp count, 127/10cm of weft count, the gained fabric can be used as filtering material, is applied to the liquid filtering in PTA or the TPA production process.Estimate the characteristic of this filtering material, and be shown in Table 1.
Embodiment 4
With warp thread is that 24s/2, weft yarn are that 7s/6, filament diameter are that the PPS spun yarn (Dongli Ltd.'s system) of 7 μ m carries out warping, adopt 330/10cm of warp count, 200/10cm of weft count, be organized as 5 piece 3 and fly satin weave and weave, make the PPS satin fabric of 344/10cm of warp count, 189/10cm of weft count, the gained fabric can be used as filtering material, is applied to the liquid filtering in PTA or the TPA production process.Estimate the characteristic of this filtering material, and be shown in Table 1.
Embodiment 5
With fibre fineness is that 1.8dtex, filament diameter are that the average length of 3 μ m is the PPS short fiber (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.PPS spun yarn plain cloth as middle one deck filter layer of cloth, using fineness is the PPS short fiber of 5 μ m as 3.3dtex, filament diameter, make the yarn that fineness is 600dtex through spinning process, utilize rapier loom to be made into 220/10cm * 165 piece/10cm plain weave filter cloth.Stack gradually according to fleece-plain cloth-fibroreticulate order, the mode by acupuncture combines.The gained fabric can be used as filtering material, is applied to the liquid filtering in PTA or the TPA production process.Estimate the characteristic of this filtering material, and be shown in Table 1.
Embodiment 6
With the single fiber diameter is that 7 μ m, total fineness are that 110dtex*6 thigh PPS long filament (Dongli Ltd.'s system) carries out warping, adopt 120/10cm of lateral density, vertical 130/10cm of density, be organized as through compiling through putting down/weaving through flat/warp plain stitch, make the PPS long filament through weaving plain cloth, the gained fabric can be used as filtering material, is applied to the liquid filtering in PTA or the TPA production process.Estimate the characteristic of this filtering material, and be shown in Table 1.
Embodiment 7
With fineness is that 4.4dtex, length are that 60mm, filament diameter are that the PPS short fiber of 7 μ m and fineness are that 3.3dtex, length are that the PTFE short fiber (Dongli Ltd.'s system) of 70mm is through blending technology, make the yarn that total fineness is 900dtex, utilize rapier loom to be made into the plain weave filter cloth, the gained fabric can be used as filtering material, is applied to the liquid filtering in PTA or the TPA production process.Estimate the characteristic of this filtering material, and be shown in Table 1.
Embodiment 8
With fineness is that 4.4dtex, straight fibre are that the PPS long filament of 7 μ m passes through blending technology with the PTFE long filament (Dongli Ltd.'s system) that fineness is 3.3dtex, make the yarn that total fineness is 850dtex, utilize rapier loom to be made into the plain weave filter cloth, the gained fabric can be used as filtering material, is applied to the liquid filtering in PTA or the TPA production process.Estimate the characteristic of this filtering material, and be shown in Table 1.
Comparative example 1
With average fibre diameter is that the CTFE monofilament of 30 μ m carries out warping, adopt 335/10cm of warp thread, 148/10cm of weft yarn, be organized as plain weave and weave, make the PPS monofilament plain cloth of 300/10cm of warp count, 140/10cm of weft count.Estimate the characteristic of this filter cloth, and be shown in Table 2.
Comparative example 2
With warp thread is that 108dtex/6*36f, weft yarn are that 105dtex/6*36f, filament diameter are that terylene (PET) yarn of 9um carries out warping, adopt 193/10cm of warp thread, 140/10cm of weft yarn, be organized as plain weave and weave, make the plain cloth of 201/10cm of warp count, 145/10cm of weft count.Estimate the characteristic of this filter cloth, and be shown in Table 2.
Table 1
Table 2
Claims (6)
1. filtering material, it is characterized in that: this filtering material comprises the fabric that one deck contains polyphenylene sulfide fibre at least, and the bubbling point scope of this filtering material is 10～500 μ m, and the average flow aperture is 0.1～400 μ m.
2. filtering material according to claim 1 is characterized in that: described fabric is formed by the polyphenylene sulfide filaments of diameter by 1～200 μ m.
3. filtering material according to claim 1, it is characterized in that: described fabric is that the pure polyphenylene sulfide multifilament of 50～2000dtex is made by fineness, or is that in the polyphenylene sulfide of 50～2000dtex and polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene, meltability tetrafluoroethene, the hexafluoropropylene copolymer one or more mix fine formed multifilament and make by fineness.
4. filtering material according to claim 1, it is characterized in that: described fabric is that the pure polyphenylene sulfide spun yarn of 0.5～10dtex is made by fineness, or is that in the polyphenylene sulfide of 0.5～10dtex and polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene, meltability tetrafluoroethene, the hexafluoropropylene copolymer one or more mix fine formed spun yarn and make by fineness.
5. filtering material according to claim 1 is characterized in that: the polyphenylene sulfide fibre that contains in the described fabric, its section are the special-shaped section of triangle, blade profile, cross, matrix pattern, polygonal, ellipse or platypelloid type.
6. filtering material as claimed in claim 1, the application of the liquid filtration material in preparation p-phthalic acid or Production of Terephthalic Acid process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101850289A CN101920138A (en) | 2009-06-10 | 2010-05-14 | Filtering material and application thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910032293.0 | 2009-06-10 | ||
| CN200910032293 | 2009-06-10 | ||
| CN2010101850289A CN101920138A (en) | 2009-06-10 | 2010-05-14 | Filtering material and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101920138A true CN101920138A (en) | 2010-12-22 |
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ID=43335504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101850289A Pending CN101920138A (en) | 2009-06-10 | 2010-05-14 | Filtering material and application thereof |
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| CN (1) | CN101920138A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106120107A (en) * | 2016-08-26 | 2016-11-16 | 厦门三维丝环保股份有限公司 | A kind of filter felt PPS fiber composite resistance to oxidation base fabric |
-
2010
- 2010-05-14 CN CN2010101850289A patent/CN101920138A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106120107A (en) * | 2016-08-26 | 2016-11-16 | 厦门三维丝环保股份有限公司 | A kind of filter felt PPS fiber composite resistance to oxidation base fabric |
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Application publication date: 20101222 |