CN1120739C - Filtering material stiffening process - Google Patents
Filtering material stiffening process Download PDFInfo
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- CN1120739C CN1120739C CN 00136523 CN00136523A CN1120739C CN 1120739 C CN1120739 C CN 1120739C CN 00136523 CN00136523 CN 00136523 CN 00136523 A CN00136523 A CN 00136523A CN 1120739 C CN1120739 C CN 1120739C
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- polystyrene resin
- base cloth
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- stiffening process
- filtrate
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Abstract
The present invention discloses filtering material stiffening technology. PET fibers are adopted, hot rolling non-woven fabric in a three-dimensional reticular structure is used as base fabric, and foamed high molecular plastic is coated on the base fabric, which accords with surface filtering mechanism. The present invention has the advantages of smooth surface and hydrophobic property, the problems of filtering superfine powder dust, fibrous powder dust, coagulating powder dust and powder dust with high moisture content are solved, and the effect on air filtration is radically enhanced.
Description
The present invention relates to a kind of treatment process of filtering material.
The core of filter is a filter medium, and filter medium has following three kinds basically:
1. fiber filter: utilize the fiber number of fiber to filter, shortcoming is that blockage factor is bigger, and loosely organized, effective drainage porosity is lower;
2. filter cartridge type: papery is filtered, the accuracy class height, and filter efficiency reaches 0.5cm99.99%, and shortcoming is that resistance is big, can not make moist intensity difference;
3. the filter cylinder tetrafluoroethene is answered film: the accuracy class height, and filter efficiency reaches 0.5cm99.99%, and deashing is easy, and shortcoming is that resistance is big, the cost height.
Synthetic fibers are because its good physicochemical properties have certain temperature resistant range, and anti-number of chemical product corrode, and advantages such as long service life are widely used in the filter, carry out various forms of filtrations.
The objective of the invention is: the stiffening process that a kind of filtrate is provided, adopt the PET fiber, the tridimensional network fabric hot rolled nonwoven fabrics is as base cloth, cover the high molecule plastic that is coated with after the foaming, meet surface filtration mechanism, have smooth surface, hydrophobicity, solved the higher dust-filtering difficult problem of ultrafine dust, fibre dust, cohesiveness dust and water capacity, make the air filtration effect that essential raising arranged.Technical scheme of the present invention is: a kind of stiffening process of filtrate, adopt non-weave non-woven fabrics as base cloth, as follows operation:
(1) adds the chloroform solvent with polystyrene resin, make polystyrene resin solution;
(2) add the chloroform solvent with expandable polystyrene resin, make expandable polystyrene resin solution;
(3) the polystyrene resin solution of taking-up step (1) adds xylene solvent and dilutes;
(4) in the polystyrene resin dilute solution of step (3), add the phthalic acid dibutylester, add the phthalic acid dibutyl ester again;
(5) the expandable polystyrene resin solution of taking-up step (2) adds xylene solvent and dilutes;
(6) the expandable polystyrene resin dilute solution of taking-up step (5) is added in the polystyrene resin dilute solution of step (4), stirs;
(7) solution of step (6) is poured in the painted groove, base cloth dipping, cylinder is rolling, allow coating foaming back drying forming.
The further technical scheme of the present invention is: a kind of stiffening process of filtrate, and adopt non-weave non-woven fabrics as base cloth, it adopts 1.5D, the PET fiber adds 10% hot melt fiber, 20%1.2D, PET fiber, air lay is rolled into the tridimensional network base cloth, as follows operation:
(1) add 3000 gram chloroform solvents with 1000 gram polystyrene resins, sealing was deposited 4 days, made polystyrene resin solution;
(2) add 5000 gram chloroform solvents with 1000 gram expandable polystyrene resin, sealing was deposited 4 days, made expandable polystyrene resin solution;
(3) the polystyrene resin solution of taking-up step (1) adds 1000 gram xylene solvents and dilutes, and it is 3--5 ten thousand that polystyrene resin solution is diluted to molecular weight, and solid content is 20%;
(4) in the polystyrene resin dilute solution of step (3), add phthalic acid dibutylester 6--8 milliliter, add phthalic acid dibutyl ester 4--5 milliliter again;
(5) the expandable polystyrene resin solution of taking-up step (2) adds 2000 gram xylene solvents and dilutes, and it is 30,000 that expandable polystyrene resin solution is diluted to molecular weight, and solid content is 12%;
(6) the expandable polystyrene resin dilute solution 105--125 milliliter of taking-up step (5) is added in the polystyrene resin dilute solution of step (4), stirs;
(7) baking oven is warmed to 120 ℃, flooding the solution that prepared in step (6) in preceding 20 minutes at base cloth pours in the painted groove, the base cloth thorough impregnation, dip time is 0.5 minute, rolling through cylinder again, make the coating on the base cloth even, allow the coating laggard oven for drying that foams, when base cloth went out the baking oven mouth, oven temperature should be controlled at 125--135 ℃.
Advantage of the present invention is:
1. the non-weave non-woven fabrics of the present invention's employing is a tridimensional network, hole is little, be evenly distributed, overall porosity reaches 70--80%, compare with woven two-dimensional structure nonwoven overall porosity 30--40%, about porosity is twice, if adopt 0.4 square millimeter focus, the nonwoven overall porosity of tridimensional network still has about 65% (hot rolling point is airtight substantially).
2. because high molecule plastic has specific critical temperature value, control makes the high molecule plastic foaming at a certain temperature behind the adding blowing agent, reconfigures, and produces 1--3 μ m uniform micro crack.
The invention will be further described below in conjunction with embodiment:
Embodiment: a kind of stiffening process of filtrate, adopt non-weave non-woven fabrics as base cloth, it adopts 1.5D, and the PET fiber adds 10% hot melt fiber, 20%1.2D, the PET fiber, air lay is rolled into the tridimensional network base cloth, as follows operation:
(1) add 3000 gram chloroform solvents with 1000 gram polystyrene resins, sealing was deposited 4 days, became polystyrene resin solution;
(2) add 5000 gram chloroform solvents with 1000 gram expandable polystyrene resin, sealing was deposited 4 days, made expandable polystyrene resin solution;
(3) the polystyrene resin solution of taking-up step (1) adds 1000 gram xylene solvents and dilutes, and it is 3--5 ten thousand that polystyrene resin solution is diluted to molecular weight, and solid content is 20%;
(4) in the polystyrene resin dilute solution of step (3), add phthalic acid dibutylester 6--8 milliliter, add phthalic acid dibutyl ester 4--5 milliliter again;
(5) the expandable polystyrene resin solution of taking-up step (2) adds 2000 gram xylene solvents and dilutes, and it is 30,000 that expandable polystyrene resin solution is diluted to molecular weight, and solid content is 12%;
(6) the expandable polystyrene resin dilute solution 105--125 milliliter of taking-up step (5) is added in the polystyrene resin dilute solution of step (4), stirs;
(7) baking oven is warmed to 120 ℃, flooding the solution that prepared in step (6) in preceding 20 minutes at base cloth pours in the painted groove, the base cloth thorough impregnation, dip time is 0.5 minute, rolling through cylinder again, make the coating on the base cloth even, allow the coating laggard oven for drying that foams, when base cloth went out the baking oven mouth, oven temperature should be controlled at 125--135 ℃.
Oven temperature is the most basic assurance of foam process, and expandable polystyrene resin is 105 ℃ of foamings, to 135 ℃ of foaming multiplying power 5--60, PS resin after the dilution, along with temperature raises, solvent evaporates becomes solid, when critical-temperature, the PS resin voids size uniformity is relatively poor.
When base cloth goes out the baking oven mouth, temperature is 125--135 ℃, obviously find out foaming spiracular slit rough surface, after terminal rubber coated pressure bowl is rolling, make the cloth smooth surface, PS foaming spiracular slit be cannot see, and amplifies 20 times of visible surface fibers and combines with PS is even, and leave micropore, amplify 600 times and can see even PS hole.
Product goes out the detection of can taking a sample in 24 hours behind the baking oven, gets 200 * 200mm specimen holder on special detection tool, uses airborne particle counter, detects relative filter efficiency and initial resistance, determines the filtration grade of product.
Test result:
Filtrate after stiffeningization is folding, and cylinder is made in thermal finalization, effective filtration area 14.5m
2, be installed on the static test platform.
1. initial resistance test:
Filtrate is in the dynamic test process, along with the variation of time, the running resistance of record filtrate can get clean quiet filtering material resistance curve, regeneration filtering material resistance curve and dynamic operation resistance curve, and can calculate the gross blockage factor of clean quiet filtrate and regeneration filtering material resistance coefficient and filtrate.
Clean quiet filtrate initial resistance 125--175pa (face velocity 1.1m/min) behind PET fiber overcoating high molecule plastic regeneration filtering material resistance 200--275pa, dynamic operation resistance 750--950pa (send out dirt and be cement and only sent out the not condition under the deashing of dirt in 30 minutes).
2. relative filter efficiency:
Φ 10mm aspiration channel is housed for the air inlet of filter cylinder testboard, front end and the airborne particle counter aspiration channel links, and the clean dead air that extracts after filter cylinder filters detects.
Atmospheric air filters:＞1 micron particles 99.9%,＞0.5 micron particles 75%, dynamically sent out dirt 30 minutes (talcum powder is only sent out not deashing condition down of dirt), and test result＞1 micron particles counting filters count number increase 35--50% than atmospheric air.
3. deashing charge stripping efficiency:
The static state of stiffeningization filtrate has been compared with common cloth bag more obviously with dynamic efficiency of dust collection and has been improved, press the 209E international standard and improve an order of magnitude, because the frosting after the foaming is smooth, has the uniform micro crack, dust laden air can pass through, various dust granules are trapped in filter material surface, be difficult to enter filtrate base cloth depths, reduce the gross blockage factor of filtrate greatly, in the thick filter material layer section of actual analysis 0.5mm, contain black microparticle bed thickness 0.02--0.05mm, realize surface filtration substantially, the jetting deashing effect is remarkable.Water capacity 15% dust can be cleaned out substantially, water capacity＞50%, in 100 ℃ of steams of temperature, ash-removal effect also can, reach common cloth bag ash-removal effect substantially.From filtrate initial resistance and regeneration resistance, filtrate has the resistance rate of climb in the long-time running process slow, not only reduces running resistance, and improve the dust peeling property energy, explanation can prolong cleaning cycle, improves filtrate service life, finally reduces operating cost and administrative expenses.
4. hydrophobic performance:
High molecule plastic PET fiber is splendid hydrophobic raw material, tests after in the water 3 months through the filtrate of stiffeningization, does not have any variation.Boiled 2 hours through 100 ℃ of boiling water, various performances do not have any variation.Complete wet filter cylinder detects through stand, initial resistance rising 100pa, and filter efficiency improves about 25% relatively.Filtrate can air dry in 2 hours after water logging, and can drop into normal the use, because filtrate has better hydrophobic, for handling water capacity greatly and contain the good condition of filtration creation of other stickums.
5. conclusion:
By above-mentioned test as can be seen stiffeningization filtrate have following characteristics:
(1) compare with the ordinary two dimensional filtrate, stiffeningization filtrate tool improves an order of magnitude 1 micron＞99.9% to filter efficiency.
(2) stiffeningization filtrate is peeled off rate and is increased substantially, and gross blockage factor reduces, and ash-removal effect is obvious, and the deashing time can prolong.
(3) running resistance of stiffeningization filtrate reduces, and dynamic operation is steady, and the fan operation power of motor reduces, and reduces operating cost.
(4) hydrophobic performance of stiffeningization filtrate surmounts other filtrates, for wet filter enterprise provides good product.
(5) according to domestic present environmental protection situation, the filtrate of stiffeningization can solve domestic enterprise's problem of environmental pollution, and this product is used and had broad prospects.
Claims (10)
1. the stiffening process of a filtrate adopts non-weave non-woven fabrics as base cloth, operates as follows:
(1) add the chloroform solvent with polystyrene resin, make polystyrene resin solution:
(2) add the chloroform solvent with expandable polystyrene resin, make expandable polystyrene resin solution;
(3) the polystyrene resin solution of taking-up step (1) adds xylene solvent and dilutes;
(4) in the polystyrene resin dilute solution of step (3), add plasticizer;
(5) the expandable polystyrene resin solution of taking-up step (2) adds xylene solvent and dilutes;
(6) the expandable polystyrene resin dilute solution of taking-up step (5) is added in the polystyrene resin dilute solution of step (4), stirs;
(7) solution of step (6) is poured in the painted groove, base cloth dipping, cylinder is rolling, allow coating foaming back drying forming.
2. the stiffening process of filtrate according to claim 1 is characterized in that: described non-weave non-woven fabrics adopts 1.5D, and the PET fiber adds 10% hot melt fiber, 20%1.2D, and the PET fiber, air lay is rolled into the tridimensional network base cloth.
3. according to the stiffening process of claim 1 or 3 described filtrates, it is characterized in that: polystyrene resin is 1000 grams in the described step (1), and chloroform is 3000 grams, and sealing was deposited 4 days.
4. according to the stiffening process of claim 1 or 3 described filtrates, it is characterized in that: expandable polystyrene resin is 1000 grams in the described step (2), and chloroform is 5000 grams, and sealing was deposited 4 days.
5. the stiffening process of filtrate according to claim 6 is characterized in that: add dimethylbenzene 1000 grams in the described step (3), it is 3--6 ten thousand that polystyrene resin solution is diluted to molecular weight, and solid content is 20%.
6. the stiffening process of filtrate according to claim 1, it is characterized in that: the plasticizer in the described step (4) is phthalic acid dibutylester and phthalic acid dibutyl ester.
7. the stiffening process of filtrate according to claim 8 is characterized in that: add phthalic acid dibutylester 6--8 milliliter in the described step (4), add phthalic acid dibutyl ester 4--5 milliliter again.
8. the stiffening process of filtrate according to claim 10 is characterized in that: add dimethylbenzene 2000 grams in the described step (5), it is 30,000 that expandable polystyrene resin solution is diluted to molecular weight, and solid content is 12%.
9. the stiffening process of filtrate according to claim 1 is characterized in that: the expandable polystyrene resin dilute solution is the 105--125 milliliter in the described step (6).
10. the stiffening process of filtrate according to claim 1, it is characterized in that: in the described step (7) baking oven is warmed to 120 ℃, flood at base cloth and the solution for preparing to be poured in the painted groove in preceding 20 minutes, the base cloth thorough impregnation, dip time is 0.5 minute, and is rolling through cylinder again, make the coating on the base cloth even, allow the coating laggard oven for drying that foams, when base cloth went out the baking oven mouth, oven temperature should be controlled at 125--135 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00136523 CN1120739C (en) | 2000-12-28 | 2000-12-28 | Filtering material stiffening process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00136523 CN1120739C (en) | 2000-12-28 | 2000-12-28 | Filtering material stiffening process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1312124A CN1312124A (en) | 2001-09-12 |
| CN1120739C true CN1120739C (en) | 2003-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00136523 Expired - Fee Related CN1120739C (en) | 2000-12-28 | 2000-12-28 | Filtering material stiffening process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822925A (en) * | 2010-06-02 | 2010-09-08 | 王庆超 | Filter core of PET (Polythylene terephthalate) terylene non-woven fabric air filter |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102441301A (en) * | 2010-04-23 | 2012-05-09 | 杭州路先非织造股份有限公司 | Spun-laced non-woven fabric filtering material and manufacturing method thereof |
| CN104383751A (en) * | 2014-11-04 | 2015-03-04 | 厦门三维丝环保股份有限公司 | Stiffening filter material structure for high-temperature-resistant filter drum |
| CN114870502A (en) * | 2022-04-26 | 2022-08-09 | 安徽世倾环保科技有限公司 | Antistatic glass fiber composite echelon filter material and preparation method thereof |
-
2000
- 2000-12-28 CN CN 00136523 patent/CN1120739C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822925A (en) * | 2010-06-02 | 2010-09-08 | 王庆超 | Filter core of PET (Polythylene terephthalate) terylene non-woven fabric air filter |
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| Publication number | Publication date |
|---|---|
| CN1312124A (en) | 2001-09-12 |
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