CN202638138U - Coated filter cloth manufactured by wet method - Google Patents
Coated filter cloth manufactured by wet method Download PDFInfo
- Publication number
- CN202638138U CN202638138U CN 201120483405 CN201120483405U CN202638138U CN 202638138 U CN202638138 U CN 202638138U CN 201120483405 CN201120483405 CN 201120483405 CN 201120483405 U CN201120483405 U CN 201120483405U CN 202638138 U CN202638138 U CN 202638138U
- Authority
- CN
- China
- Prior art keywords
- filter cloth
- coated
- filter
- filtration
- wet method
- 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 - Lifetime
Links
Images
Abstract
The utility model discloses a coated filter cloth manufactured by a wet method. A coated membrane layer of the coated filter cloth is obtained by a wet coagulation coating method. The technical solution of the coated filter cloth is as follows: firstly, a coated surface of the filter cloth to be coated is calendered; then, a coating agent of an organic polymer material having high porosity, smooth surface, good elasticity and good wear resistance is coated or dip-coated on the surface of the filter cloth which is calendered through a coating or immersion apparatus; after that, the filter cloth coated by the coating agent is immersed in a coagulation bath and is detained for some time in the coagulation bath with a certain temperature to ensure that the coating agent forms film well on the surface of the filter cloth, and required porosity and membrane thickness can be obtained by controlling and adjusting the temperature of the coagulation bath and the detained time; afterwards, the coated filter cloth is washed and dried, so that the technological process of the coated filter cloth manufactured by the wet method is finished. The obtained coated filter cloth changes deep filtration into surface filtration, so that filtered materials cannot aggregate in pores among yarns of the filter cloth and can be smoothly separated from the filter cloth along with cake-discharging process of a filter cake; and phenomena that the filtered materials block the pores inside the fibers, of the fibers, among the fibers and among the yarns of the filter cloth are eradicated completely, thereby greatly reducing the blocking possibility of the filter cloth by the filtered materials. The coated filter cloth is an important means and an effective path for increasing filter efficiency, decreasing energy consumption of a filter system, reducing blocking of the filter cloth, greatly increasing service life of the filter cloth and greatly reducing production cost; and can be widely used for liquid/solid separation, filtration, dehydration, material purification and recovery operation in industries such as mine, metallurgy, chemical engineering, light industry, foodstuff, etc.
Description
Technical field
The utility model relates to the overlay film filter cloth that a kind of wet method is made.Especially, Gu the present invention relates to the filter medium of filter medium, material purification or the recovery usefulness of a kind of filter medium for mineral resources industry raising resource recycling rate, industrial fluids liquid/separation.
Background technology
At present, Gu dehydration, coal washing, industrial fluids liquid/separation, material that industry is widely used in the mineral products thing of mineral resources industry with the textile fabric filter medium are purified or the filter progress that reclaims in.And used filter medium mostly is Woven filter cloth or the nonwoven filter cloth of being made by chemical fibre or natural fiber on the industrial filter machine.
The filtering function of this Woven filter cloth or nonwoven filter cloth is to finish by the staggered institutional framework of tangling that crosses one another between formed institutional framework or fiber of weaving of warp thread and weft yarn, and the porosity control of its filtration is separately density, and the warp thread and weft yarn interweaves or intermeshing density and mode realize by fiber number, warp thread and the weft yarn of warp thread and weft yarn.And, warp thread and weft yarn interweave or cross-point or the interfibrous filter cloth surface that mutually becomes entangled in have formed comprehensive equally distributed intertwined point or slit, very easily in filtration operation process frequently, in the slit of these intertwined points or entanglement, assemble gradually and accumulate so that be filtered composition granule, formed the in-depth filtration form, so that the filter cloth hole diminishes, be difficult for cake discharge, filter cloth stops up, filtered fluid input system pump pressure increases, filter efficiency reduces, the filter cloth replacement cycle shortens, filter cloth minimizing in service life, filter cloth is easy cleaning not, even filter cloth cleans the drawbacks such as rear reusable number of times minimizing, cause and filter production efficiency decline and production cost rising.It is technical barrier very thorny in the industry that this filter medium pollutes always.
On filtration mechanism, Gu the ideal form of liquid/separation is both surface filtration, that is: only allow be filtered the surface that filter cloth is assembled or be attached to material, rather than allow and be filtered material and embed, assemble or accumulate in the structure slit of filter cloth.In order to make Woven filter cloth or nonwoven filter cloth reach the effect of both surface filtration, one of the most effective way is even at the filtration working face coating last layer of Woven filter cloth or nonwoven filter cloth and is rich in the rete of micropore.This rete can be with the coarse surface coverage of woven filtration convex-concave, thereby reduces the probability that solid particle enters filter cloth inside; This film not only itself has required filtration porosity and guarantees smooth filtration, and can be retained in film surface and filter cake and be shaped well being filtered thing, and improves the discharge rate that is filtered thing.
In order to reach this purpose, the technical staff in the sector field has carried out many effort and exploration for many years.Such as: carry out overlay film on the filter cloth surface, carry out the methods such as direct coating on the filter cloth surface.The method of wherein, carrying out overlay film on the filter cloth surface refers to manufacture that the film material is combined filter cloth and film material in the mode of hot pressing or spot bonding agent.Facts have proved that the hot pressing method with plastic film easily produces the film material and in use is easy to the problem that comes off; Spot bonding agent bonding film material and filter cloth exist the spot bonding point to be distributed widely in the drawback that has reduced effective filtration area on the filter cloth; Directly coating refers to then, make the method for coating agent dry solidification film forming through Overheating Treatment at the film of the suitable high polymer of fabric face coating one deck.Directly the problem of coating is when coating is thicker, and the oven dry film forming easily makes the film surface produce more prominent body and affects the inhomogeneous and porosity of distribution of pores on product quality, the film material and be difficult to adjust and control.Up to now, in the manufacturing field of textile fabric Woven filter cloth or nonwoven filter cloth, still fail to propose good solution.
Summary of the invention
For the problems referred to above, the utility model discloses the overlay film filter cloth that a kind of wet method in textile fabric Woven filter cloth or nonwoven filter cloth manufacturing field is made.The main feature of the overlay film filter cloth of described wet method manufacturing is the surface to be applied a kind of filter cloth with high-molecular organic material of favorable elasticity and wearability place coagulating bath, under certain temperature action and through after certain holdup time, this macromolecular material is at the porous membrane of filter cloth Surface Creation surfacing, and the one-tenth porosity of its film material and porosity are very high, adjustment and the control of the concentration of concentration, temperature, the length of holdup time and organic solvent that the porosity of film material can be by coagulating bath in processing procedure.This method is film forming in coagulating bath with the difference of direct coating maximum.Directly coating then is film forming in oven dry, and when coating was thicker, the oven dry film forming easily made the film surface produce the drawbacks such as more prominent body, be full of cracks, pin hole fire porosity be irregular and affects the strainability of filter cloth.
The technical scheme of the overlay film filter cloth of described wet method manufacturing is: will need first the overlay film face of the filter cloth of overlay film processing to carry out the calendering processing, purpose is to make to need the surfacing of overlay film smooth, is beneficial to the even film forming of film material.Then, apply a kind of coating agent with high porosity, surface smoothing, elasticity is good, wearability is good high-molecular organic material on the filter cloth surface of processing through calendering by plater.Filter cloth with the applying coating agent immerses in the coagulating bath again, in the coagulating bath with uniform temperature, be detained the regular hour, to guarantee that coating agent is good at the surface filming of filter cloth, the temperature of control and adjustment coagulating bath and holdup time are to obtaining needed porosity and thicknesses of layers.Then wash and dry, finish the technological process that wet method is made the overlay film filter cloth.
To be overlay film filter cloths of adopting described wet method manufacturing become both surface filtration with the in-depth filtration of textile fabric Woven filter cloth present, known or nonwoven filter cloth to the beneficial effects of the utility model; The porosity of film material is higher, can reach 80% and more than, the aperture of film material is variable in 0.5～9.0 micrometer range; Because the pore diameter of institute's overlay film material is very little, the solid particle in the suspension is difficult to enter in the hole of film material, thereby has high solid rejection; Filtering surface is smooth and have good hydrophobicity, and cake discharge is smooth and easy, discharge rate reach 95% and more than; Has certain antiacid alkali ability.
This shows, in according to technique scheme of the present utility model, the overlay film filter cloth of described wet method manufacturing becomes both surface filtration with in-depth filtration, so that can not concentrating in the hole between the yarn of described filter cloth and along with the cake discharge process of filter cake, the material that filters do not break away from smoothly filter cloth, stopped in the feed blocking that the filters hole in intrastitial, the fiber of filter cloth, between interfibrous and yarn, thereby greatly reduced the possibility that is filtered the feed blocking filter cloth.So the overlay film filter cloth of described wet method manufacturing is to improve filter efficiency, reduce the filtration system energy consumption, reduce filter cloth and stop up, increase considerably filter cloth service life, significantly important means and the effective way of Decrease production cost; Gu can be widely used in liquid/separation in the industries such as mine, metallurgy, chemical industry, light industry, food, filtration, dehydration, material purification and the recovery operation.
Description of drawings
The technical solution of the utility model or technological process have been showed in the accompanying drawing.1 for treating the filter cloth of overlay film processing among the figure, and 3 is calender, and 2 is dipping tank, and 4 is the coating scraper, and 5 are coagulating bath, and 6 is rinsing bowl, and 7 is drying baker, and 8 is finished product.At first, Woven filter cloth or the clot of nonwoven filter cloth of overlay film will be treated, carrying out first calendering processes, then, filter cloth after processing through calendering treats that the overlay film surface carries out polyurethane coating or dipping, then immerses immediately in the coagulating bath, is detained the regular hour according to the requirement of required film material porosity in the coagulating bath of uniform temperature, then wash and dry, finished product.
The specific embodiment
The below describes embodiment of the present utility model in detail, and described embodiment only is used for explanation the utility model, and can not be interpreted as restriction of the present utility model.
Follow the described flow process of accompanying drawing, as the filter cloth for the treatment of overlay film, the formation fibrous raw material of this filter cloth is polypropylene filament yarn to select Woven filter cloth (among the figure 1), and its longitude and latitude fiber number is 750D, and its thread count is 160/10CM, is organized as plain weave.Because it is very large that this filter cloth consists of the fiber number of fiber, made filter cloth cloth cover is rough and uneven in surface, therefore, must carry out first the calendering on overlay film surface and process before carrying out overlay film, so that the smooth surface that the film material is generated is smooth, and then so that the film that generates is evenly smooth.Calender (among the figure 3) is selected metal smooth roll and nylon smooth roll combination calendering, and theoretical maximum pressure is 80 tons, and the temperature that calendering is processed is 130-150 ℃, and the speed of service is 5 m/mins.Immerse immediately after calendering is processed in the dipping tank that contains polyurethane solutions (among the figure 2) and carry out impregnation process, after the impregnation process with scraper (among the figure 4) the coating solution scraping that the filter cloth back side is unnecessary, in order to reduce the solution consumption.Used coating agent is a kind of have high porosity, surface smoothing, elasticity is good, wearability is good high-molecular organic material---PAUR elastomer.This coating agent is easy to be dissolved in the strong organic solvent of polarity and forms the very high film of porosity in water.Then coated filter cloth is immersed in the coagulating bath (among the figure 5) and carry out the freezing film reaction.The composition of coagulating bath is DMF (dimethyl formamide, a kind of polyurethane solvent) aqueous solution, because water and DMF have compatibility with polyurethane without compatibility, thereby water can cement out the DMF in the rete under the hygrometric state, thereby the concentration of the DMF in the reduction coagulating bath, under the effect of temperature and duration, so that solvent stripping, the polyurethane of dissolved state just freeze-outs at the interface of aqueous solvent simultaneously, become the object of microcellular structure, through after the oven dry, just form the microporous barrier of even compact again.In the present invention, the concentration of the coagulating bath DMF aqueous solution is 20-40%, and temperature range is about 20 ℃, and the holdup time is 5-15 minute.Freezing film finish laggard enter in the rinsing bowl (among the figure 6) fully wash, washing temperature is below 90 ℃.Because the polyurethane from coagulating bath filter cloth out solidifies substantially, but a certain amount of DMF is still contained in its inside, and the purpose that hot water cleans is exactly residual DMF will be cleaned as much as possible.Enter again the interior drying and processing of drying baker (among the figure 7) after the washing, and make to finished product (among the figure 8).The key here is to control and to adjust the length of concentration, temperature and the holdup time of coagulating bath, because only have control and adjusted this several key elements, could control and adjust the porosity of film.The concentration of the DMF aqueous solution is low, and setting rate is fast, and the hole in the film is large, stick intensity and scuff resistance will reduce; The concentration of the DMF aqueous solution is high, and setting rate is slow, and the hole in the film is trickle, the density of film increases, stick intensity and scuff resistance can strengthen, the hardness of film also can improve.Coagulation bath temperature and holdup time are also very big with the filming performance relation, and temperature is low, and DMF ground diffusion velocity is slow, temperature height, diffusion velocity are just fast, cause the film too fast formation compacted zone in surface and affect the even diffusion of inner DMF, the pore-forming aperture is little and irregular, the attenuation of filming.In the practice, the concentration of coagulating bath DMF solution is 20-40%, and temperature range is about 20 ℃, and the holdup time is 5-15 minute, and utilizes the surfactant that adds to control the diffusion velocity of DMF, has obtained comparatively desirable treatment effect.
Need to prove, in above-mentioned technical scheme, can will use according to method of the present utility model and described filter cloth in the industries such as oil, chemical industry, ore dressing, sewage disposal, sugaring, pharmacy on the flame filter press in the liquid-solid separation of needs, dehydration, the purification work flow, box filter, inside and outside rotary drum filter, tray type filter, vertical plate formula filter, the horizontal belt filter etc.Protection domain of the present utility model is not limited on the above-mentioned filter of enumerating thus, but can be applied to any needs on any filter that filter cloth filters industrial fluids.After the utility model enforcement is complete, carry out the examination test, through certification test, obtained the good result of expection.
The above is preferred embodiment of the present utility model only, is not that the utility model is done any pro forma restriction.The those of ordinary skill of all industry, but all shown in the by specification and the above, implement swimmingly the utility model.But all those skilled in the art are not breaking away from the technical solutions of the utility model scope, and a little change of making when utilizing the disclosed above technology contents, the equivalent variations of modifying and developing are equivalent embodiment of the present utility model; Simultaneously, the change of any equivalent variations that all foundations essence technology of the present utility model is done above embodiment, modify with differentiation etc., all still belong to the scope of the technical solution of the utility model.
Claims (2)
1. the overlay film filter cloth made of a wet method, it is characterized in that: the filter cloth surface of described filter cloth has applied one deck PAUR elastic membrane.
2. the overlay film filter cloth made of a kind of wet method according to claim 1, it is characterized in that: the filtration working surface of filter cloth is processed through calendering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120483405 CN202638138U (en) | 2011-11-24 | 2011-11-24 | Coated filter cloth manufactured by wet method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120483405 CN202638138U (en) | 2011-11-24 | 2011-11-24 | Coated filter cloth manufactured by wet method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202638138U true CN202638138U (en) | 2013-01-02 |
Family
ID=47407320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120483405 Expired - Lifetime CN202638138U (en) | 2011-11-24 | 2011-11-24 | Coated filter cloth manufactured by wet method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202638138U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108035029A (en) * | 2017-12-26 | 2018-05-15 | 瑞安市华臻鞋材有限公司 | Polyurethane knits the processing formula and its processing method of line |
| CN113069832A (en) * | 2021-04-07 | 2021-07-06 | 天台宏辉过滤科技有限公司 | Hydrophobic anti-blocking wear-resistant industrial filter cloth and preparation method thereof |
-
2011
- 2011-11-24 CN CN 201120483405 patent/CN202638138U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108035029A (en) * | 2017-12-26 | 2018-05-15 | 瑞安市华臻鞋材有限公司 | Polyurethane knits the processing formula and its processing method of line |
| CN113069832A (en) * | 2021-04-07 | 2021-07-06 | 天台宏辉过滤科技有限公司 | Hydrophobic anti-blocking wear-resistant industrial filter cloth and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103132331B (en) | A kind of wet method manufactures the method for overlay film filter cloth | |
| KR101592329B1 (en) | Hybrid Type Fiber Filtering Apparatus | |
| CN104118178B (en) | A kind of preparation method of PPS superfine fibre composite filtering material | |
| US4758453A (en) | Textile substrate for bio-transformation and phase separation | |
| CN109312412A (en) | Animal skin base material treatment method and apparatus | |
| CN202638138U (en) | Coated filter cloth manufactured by wet method | |
| CN103952914A (en) | Method for making coated filter cloth through wet process | |
| CN101879389A (en) | Woven filter cloth with self-cleaning function and production method thereof | |
| CN107620152B (en) | Method for manufacturing plush filter cloth for sewage treatment | |
| KR20150129737A (en) | Process for using a cross-flow filter membrane to remove particles from a liquid stream | |
| Guerra et al. | High-speed filtration using highly porous fiber media for advanced and compact particle removal | |
| CN104220560A (en) | Method for recovering hydrocarbon fluids from a hydraulic fracturing process | |
| CN115304082A (en) | Process for recovering NaCl in salt mud for chlor-alkali production | |
| RU192457U1 (en) | Filter material | |
| CN106757667A (en) | A kind of manufacture method of the polyamide monofilament fiber Woven filter cloth of easily de- cake | |
| CN103127774A (en) | Oil contamination resistant weaving filter cloth and preparation method thereof | |
| US6106897A (en) | Polymer pore structure | |
| CN102312375A (en) | Method for performing anhydrous greasy dirt prevention treatment on filter medium prepared from textile fibers | |
| CN107537224A (en) | A kind of spun lacing method manufacture castor-oil plant silk fiber is the method for the nonwoven filtration cloth of raw material | |
| JP2002511635A (en) | Conductive activation device for porous structures | |
| JPS6121799A (en) | Dehydration treatment of water-containing sludge | |
| CN102309892A (en) | Textile fiber filter medium for water-free and chemical-free greasy dirt preventing treatment | |
| RU212091U1 (en) | Filter for mechanical waste water treatment | |
| KR101429216B1 (en) | Floating fiber filter media and high speed filter of upward flow type using the same | |
| FI82387B (en) | FOERFARANDE FOER TILLVARATAGANDE AV FIBER UR VATTENSTROEMMAR. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |