CN1283515A - Coated filter material and its preparing process - Google Patents
Coated filter material and its preparing process Download PDFInfo
- Publication number
- CN1283515A CN1283515A CN 99113143 CN99113143A CN1283515A CN 1283515 A CN1283515 A CN 1283515A CN 99113143 CN99113143 CN 99113143 CN 99113143 A CN99113143 A CN 99113143A CN 1283515 A CN1283515 A CN 1283515A
- Authority
- CN
- China
- Prior art keywords
- coating
- base cloth
- filter
- cloth
- coated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 13
- 239000004744 fabric Substances 0.000 claims abstract description 52
- 239000011248 coating agent Substances 0.000 claims abstract description 39
- 238000000576 coating method Methods 0.000 claims abstract description 27
- -1 polypropylene Polymers 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 15
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 14
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 229920002635 polyurethane Polymers 0.000 claims abstract description 9
- 239000004814 polyurethane Substances 0.000 claims abstract description 9
- 239000004743 Polypropylene Substances 0.000 claims abstract description 6
- 229920001155 polypropylene Polymers 0.000 claims abstract description 6
- 239000000654 additive Substances 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 claims abstract 3
- 239000002033 PVDF binder Substances 0.000 claims abstract 3
- 229920000728 polyester Polymers 0.000 claims abstract 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims abstract 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 24
- 230000000996 additive effect Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 abstract description 9
- 239000011148 porous material Substances 0.000 abstract description 5
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 abstract 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 6
- 230000001112 coagulating effect Effects 0.000 description 6
- 238000003475 lamination Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 229920004933 Terylene® Polymers 0.000 description 3
- 238000009954 braiding Methods 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 239000012982 microporous membrane Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005363 electrowinning Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003828 vacuum filtration Methods 0.000 description 2
- 229920000544 Gore-Tex Polymers 0.000 description 1
- 229920000784 Nomex Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 206010025482 malaise Diseases 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000004763 nomex Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Filtering Materials (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
一种涂层过滤材料及其制造方法,该材料选用涤纶、丙纶长丝平纹或斜纹机经滤布为基布,表面上涂上涂层剂形成涂层过滤介质,涂层剂由二甲基甲酰胺溶解的聚胺酯;浓度为20—50%,加入成孔剂乙二醇单甲醚,添加剂聚偏氟乙烯和聚四氟乙烯超细粉配制而成。其制备方法是首先选择基布,将基布固定在玻璃或其它材料的平板上,将涂层剂均匀地分配到基布上,用涂层刀刮涂后,再将涂层后的滤布放入干燥箱内二次干燥,本发明的涂层过滤材料应用广泛,功能强,可适于各种过滤设备,且可作为隔膜材料。A coated filter material and a manufacturing method thereof. The material uses polyester or polypropylene filament plain weave or twill weave filter cloth as a base cloth, and a coating agent is coated on the surface to form a coated filter medium. The coating agent is composed of dimethyl Polyurethane dissolved in formamide; the concentration is 20-50%, and it is prepared by adding pore forming agent ethylene glycol monomethyl ether, additives polyvinylidene fluoride and polytetrafluoroethylene ultrafine powder. The preparation method is to first select the base cloth, fix the base cloth on a flat plate of glass or other materials, distribute the coating agent evenly on the base cloth, scrape the coating with a coating knife, and then apply the coated filter cloth Putting it into a drying oven for secondary drying, the coating filter material of the present invention is widely used, has strong functions, is suitable for various filtering equipment, and can be used as a diaphragm material.
Description
The invention belongs to filtering material and manufacture method thereof that Separation of Solid and Liquid is used.
Existing filter medium is divided three classes, and the one, woven filter cloth; Two is non-braiding filter cloth, as Nomex etc.; Three is the rigidity porous media, as micropore ceramics, sintered metal net etc.Woven filter cloth and non-braiding filter cloth have following problems:
1, the filter cloth hole is too big, and it is bigger often to filter the initial stage flow velocity, but after filtering a period of time, solid particle will enter the medium hole, and filter efficiency is descended rapidly, needs continuous backwash just can keep ordinary production;
2, minute-pressure poor (＜1500Pa) down water penetration is too strong, can not use as barrier film and keep the liquid level difference on medium both sides, for example separates anode and cathode electrolyte in the nickel electrowinning process, unless increase substantially knitting density and filter cloth thickness (increasing cost greatly);
3, filtrate turbidity height causes valuable constituent to run off on the one hand, causes environmental pollution on the other hand again easily;
4, filter cloth is short service life, and because of easily blocked in filter process, in the short period of time, voidage greatly reduces, though available water backwash regeneration, power of regeneration is limited.Just needed in general 8-30 days to change once, cause bigger economic loss;
5, reclaim relatively difficulty of subparticle.
In recent years, filtering material and manufacturing technology thereof have new development again, coated filter material occurred.Adopt the lamination coating technology to make the microporous membrane filter cloth as U.S. Gore-Tex company; People such as the Kang Yong of Northeast China university adopt the coagulating bath technology to make the microporous membrane filter cloth.The former sticks on the common woven filter cloth by lamination with the films such as polytetrafluoroethylene (PTFE) that draw, and forms the microporous membrane composite filter media, thereby complex process, the cost height, and base cloth easily comes off with the film adhesion is insecure; The latter is elder generation's blade coating coating agent on common woven filter cloth surface, soaks in coagulating bath again, carries out drying then, though compare with the former, cost is lower, but still has complex process, and coagulating bath is difficult for shortcomings such as processing.In addition, under low pressure water penetration is very poor with composite microporous film filter cloth that above-mentioned two kinds of methods are made, or permeable hardly, and difficulty is used for vacuum filtration and uses as barrier film.
The object of the present invention is to provide a kind ofly both can be widely used in various filter plants, it is simple to can be used as Separation of Solid and Liquid material and production technology that barrier film uses again, the manufacture method that processing cost is low.
The present invention is achieved through the following technical solutions its goal of the invention.
With terylene, polypropylene filament yarn plain weave or twill woven filter cloth is base cloth, and the coated agent forms the coating filter medium on the base cloth surface.
Manufacture method is as follows: at first selecting terylene, polypropylene filament yarn plain weave or twill woven filter cloth is base cloth, base cloth is fixed on the flat board of smooth smooth glass or other material, be assigned to the coating agent for preparing on the base cloth equably again, use coating cutter blade coating then, filter cloth after the coating is put into the drying box redrying, temperature is 40 ℃-50 ℃ for the first time, and be 10-20 minute drying time; Temperature is 100 ℃-120 ℃ for the second time, and be 10-20 minute drying time.Both can be made into coated filter material of the present invention by above method.The coating agent prescription is the Polyurethane of dimethyl formamide dissolving, and concentration is 20-50%; Add the pore former glycol monoethyl ether, additive Kynoar and superfine powder of polytetrafluoroethylene.Dimethyl formamide wherein: glycol monoethyl ether is 1: 1-2; Polyurethane: Kynoar: polytetrafluoroethylene (PTFE) is 1-3: 1-4: 1.
The present invention compares with non-braiding filter cloth with existing woven filter cloth and has the following advantages:
1, hole prosperity, aperture are little, because this medium is after coating on the common woven filtration filter cloth, the volatilization of drying pore former and pore-forming.When filtering with this medium, what mainly carry out is surface filtration, and solid particle almost can't enter medium inside, thereby filter effect can reduce because of the prolongation of filtration time hardly;
2, filtrate is limpid, and turbidity is low, and solid particle nearly all during filtration all can't pass through, thereby the turbidity of filtrate is minimum;
3, filter cloth is anti-stifled, and the life-span is long, and filter medium hole of the present invention is little, and is blocked hardly, thereby filter is under duty normally, and service life is longer, unless scratched by sharp implements, mechanical failure such as impact.Coating and base cloth are bonding closely and have higher chemical inertness, can not peel off with base cloth or be corroded by other material.
The present invention compares to have with coagulating bath coating filter medium with lamination coating micropore membrane filtration medium and is widely used, characteristics such as function is strong, the only suitable high-pressure filteration of lamination coating micropore membrane filtration medium and coagulating bath coating filter medium, and be not suitable for vacuum filtration, more be unwell to and make barrier film, and coated filter material of the present invention can be suitable for various filter plants, comprise vacuum filter, but also can be used as diaphragm material, for example can be used in the nickel electrowinning production process to separate anode and cathode electrolyte.Its manufacture method is compared with the coagulating bath coating process with the lamination coating, and it is simple to have technology, the advantage that cost is low.
Embodiment 1: at first select base cloth, adopting the terylene woven filter cloth is base cloth, is fixed on the smooth smooth glass plate, be assigned to the coating agent for preparing on the base cloth equably again, the coating agent prescription is the Polyurethane of dimethyl formamide dissolving, and concentration is 30%; Add the pore former glycol monoethyl ether, additive Kynoar and superfine powder of polytetrafluoroethylene.Dimethyl formamide wherein: glycol monoethyl ether is 1: 1, Polyurethane: Kynoar: polytetrafluoroethylene (PTFE) is 3: 1: 1, uses coating cutter blade coating then, and the filter cloth after the coating is put redrying in people's drying box, temperature is 40 ℃ for the first time, and the time is 20 minutes; Temperature is 100 ℃ for the second time, and the time is 20 minutes.
Embodiment 2: at first select base cloth, adopting the polypropylene filament yarn woven filter cloth is base cloth, be fixed on the smooth smooth glass plate, be assigned to the coating agent for preparing on the base cloth equably again, use coating cutter blade coating then, filter cloth after the coating is put into the drying box redrying, and temperature is 50 ℃ for the first time, and be 10 minutes drying time; Temperature is 120 ℃ for the second time, and be 10 minutes drying time.The coating agent prescription is the Polyurethane of dimethyl formamide dissolving, and concentration is 50%, adds the pore former glycol monoethyl ether, additive Kynoar and superfine powder of polytetrafluoroethylene.Dimethyl formamide wherein: glycol monoethyl ether is 1: 1.5; Polyurethane: Kynoar: polytetrafluoroethylene (PTFE) is 3: 4: 3.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113143A CN1111076C (en) | 1999-08-05 | 1999-08-05 | Coated filter material and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113143A CN1111076C (en) | 1999-08-05 | 1999-08-05 | Coated filter material and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1283515A true CN1283515A (en) | 2001-02-14 |
| CN1111076C CN1111076C (en) | 2003-06-11 |
Family
ID=5276372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99113143A Expired - Fee Related CN1111076C (en) | 1999-08-05 | 1999-08-05 | Coated filter material and its preparing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1111076C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102641621A (en) * | 2011-02-22 | 2012-08-22 | 苏州市东方净水器厂 | Manufacturing technology of tetrafluoroethylene membrane filter element |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397437B (en) * | 2008-07-23 | 2012-03-21 | 厦门三维丝环保股份有限公司 | Coating composition for improving filter material surface and coating formation method thereby |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063675C (en) * | 1995-10-09 | 2001-03-28 | 康勇 | Composite porous filtering film material and its prodn |
-
1999
- 1999-08-05 CN CN99113143A patent/CN1111076C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102641621A (en) * | 2011-02-22 | 2012-08-22 | 苏州市东方净水器厂 | Manufacturing technology of tetrafluoroethylene membrane filter element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1111076C (en) | 2003-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5310658B2 (en) | Separation membrane manufacturing method and separation membrane | |
| JP3232117B2 (en) | Polysulfone porous hollow fiber | |
| JPH04507112A (en) | Composite molded products, their applications and manufacturing methods | |
| CN103071403A (en) | Double desalting layer composite reverse osmosis membrane and preparation method thereof | |
| WO2012079422A1 (en) | Method for preparing liquid separation membrane complexed and reinforced with polyvinylidene fluoride | |
| JP2013510717A5 (en) | ||
| CN107855007A (en) | A kind of asymmetric forward osmosis membrane and preparation method thereof | |
| CN113769593A (en) | Nanofiltration membrane for extracting lithium from salt lake and preparation method thereof | |
| CN1111076C (en) | Coated filter material and its preparing process | |
| EP4176105A1 (en) | A separator for water electrolysis | |
| CN119075710A (en) | PTFE folding type backflushing filter element with high dirt holding capacity and low flow resistance, and preparation method and application thereof | |
| CN113828174A (en) | Reverse osmosis membrane with double-layer composite structure and preparation method thereof | |
| CN114159983A (en) | A kind of organic tubular membrane resistant to backwashing and preparation method thereof | |
| CN100423822C (en) | Large aperture polyethersulfone film, preparation method and usage thereof | |
| CN1063675C (en) | Composite porous filtering film material and its prodn | |
| JP2001252538A (en) | Reverse osmosis composite membrane | |
| CN102755785A (en) | Tetrafluoro anti-sticking filter cloth | |
| JPH10509685A (en) | Removal process of metal impurities by electrochemical route | |
| CN208440380U (en) | A kind of big flux filter core of inside-admission outside-exit type being easily changed | |
| CN104203378B (en) | Perforated membrane and preparation method thereof | |
| JP2010110693A (en) | Method of manufacturing composite porous separation membrane | |
| JPS5814904A (en) | Support sheet for liquid separation membrane and continuous preparation thereof | |
| CN212446595U (en) | Glass fiber bulked filter cloth and PTFE fiber composite dedusting filter material | |
| CN112076636B (en) | Preparation method of high-efficiency filtration porous metal composite membrane | |
| CN112516673B (en) | Sizing process of diatomite filter for lithium electro-copper foil system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |