CN1111076C - Coated filter material and its preparing process - Google Patents
Coated filter material and its preparing process Download PDFInfo
- Publication number
- CN1111076C CN1111076C CN99113143A CN99113143A CN1111076C CN 1111076 C CN1111076 C CN 1111076C CN 99113143 A CN99113143 A CN 99113143A CN 99113143 A CN99113143 A CN 99113143A CN 1111076 C CN1111076 C CN 1111076C
- Authority
- CN
- China
- Prior art keywords
- coating
- base cloth
- filter
- cloth
- base fabric
- 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.)
- Expired - Fee Related
Links
Abstract
The present invention relates to a coating filtering material and a manufacturing method thereof. The material uses the terylene, polypropylene filament plain weave or twill woven filtration fabric as base fabric, coating agents which are spread on the surface of the base fabric to form coating filtering mediums are prepared from polyamine ester dissolved by dimethyl formamide, pore forming agents, namely ethylene glycol monomethyl ether, additive, namely polyvinylidene fluoride, and the superfine powder of polytetrafluoroethylene, wherein the concentration of the polyamine ester is 20 to 50%. The present invention has a preparation method that the base fabric which is selected is fixed on a flat plate made of glass or other material, the coating agents are uniformly distributed on the base fabric, and after the coating agents are scratched by a coating knife, the filtration fabric with coatings is put in a drying oven for secondary drying. The coating filtering material of the present invention has the advantages of wide application and powerful functions, and the coating filtering material which can be suitable for various kinds of filtering equipment can be used as 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 advance people's 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, is 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 into the drying box redrying, 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)
1, a kind of coated filter material, it is characterized in that: this material selection terylene, polypropylene filament yarn plain weave or twill woven filter cloth are base cloth, the coated agent forms the coating filter medium on the base cloth surface, its coating agent is the Polyurethane of dimethyl formamide dissolving, concentration is 20-50%, add the pore former glycol monoethyl ether, additive Kynoar and superfine powder of polytetrafluoroethylene are formulated.
2, coated filter material according to claim 1 is characterized in that said coating agent proportioning is:
Dimethyl formamide: glycol monoethyl ether is 1: 1-2;
Polyurethane: Kynoar: polytetrafluoroethylene (PTFE) is 1-3: 1-4: 1.
3, a kind of manufacture method of coated filter material, it is characterized in that: at first select base cloth, selecting terylene, polypropylene filament yarn plain weave or twill woven filter cloth for use is base cloth, base cloth is fixed on the flat board of glass or other material, again the coating agent for preparing is assigned on the base cloth equably, uses coating cutter blade coating then, the 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.
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 CN1283515A (en) | 2001-02-14 |
| CN1111076C true 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 |
|---|---|---|---|---|
| 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 |
Families Citing this family (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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147417A (en) * | 1995-10-09 | 1997-04-16 | 康勇 | Composite porous filtering film material and its prodn |
-
1999
- 1999-08-05 CN CN99113143A patent/CN1111076C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147417A (en) * | 1995-10-09 | 1997-04-16 | 康勇 | Composite porous filtering film material and its prodn |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1283515A (en) | 2001-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3232117B2 (en) | Polysulfone porous hollow fiber | |
| CN107081078B (en) | preparation method of nano-structure composite ultrafiltration membrane | |
| CN103071403B (en) | Two desalination layer complex reverse osmosis membrane and preparation method thereof | |
| US4743349A (en) | Electrically conductive fibrous web substrate and cathodic element comprised thereof | |
| CN113769593B (en) | Nanofiltration membrane for extracting lithium from salt lake and preparation method thereof | |
| CN107855007A (en) | A kind of asymmetric forward osmosis membrane and preparation method thereof | |
| CN1111076C (en) | Coated filter material and its preparing process | |
| EP0545858A2 (en) | Electrolytic treatment of an acid solution | |
| CN109647222B (en) | Method for preparing high-flux high-rejection-rate aromatic polyamide composite reverse osmosis membrane by using tannic acid modified base membrane | |
| CN114159983A (en) | Backwashing-resistant organic tubular membrane and preparation method thereof | |
| CN1063675C (en) | Composite porous filtering film material and its prodn | |
| CN113828174A (en) | Reverse osmosis membrane with double-layer composite structure and preparation method thereof | |
| CN207951137U (en) | A kind of forward osmosis membrane for water process | |
| CN102755785A (en) | Tetrafluoro anti-sticking filter cloth | |
| EP0465649B1 (en) | Composite semipermeable membrane and production thereof | |
| CN114797493B (en) | Temperature-resistant composite separation membrane and preparation method thereof | |
| CN111389233A (en) | Preparation method of microfiltration membrane repairing liquid for functional layer damage and microfiltration membrane repairing method | |
| JP2001252538A (en) | Reverse osmosis composite membrane | |
| MXPA97003602A (en) | Process for the removal of metallic impurities through electroquim route | |
| CN212446595U (en) | Glass fiber bulked filter cloth and PTFE fiber composite dedusting filter material | |
| CN111085047A (en) | Preparation method of washable nanofiber screen window for PM2.5 particle filtration | |
| CA1076065A (en) | Method of making porous plastic diaphragms and the resulting novel diaphragms | |
| CN112516673B (en) | Sizing process of diatomite filter for lithium electro-copper foil system | |
| CN114288877B (en) | Nanocellulose hydrogel film with efficient separation function and preparation method and application thereof | |
| CN115591321A (en) | Polyester filter cloth and hydrophilic modification method thereof |
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 |