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China Suppliers Factory: Premium Candle Filter Cartridge for Spunbond Nonwoven and Polymer Melt Filtration
Description
In the production of spunbonded nonwoven fabrics, to ensure the smooth progress of the spinning process and reduce the occurrence of phenomena such as filament breakage and material dripping, two sets of filtration devices are generally installed. The first filter (coarse filter) is installed between the screw extruder and the metering pump. Its main function is to filter out larger impurities to extend the service life of the second filter device, protect the metering pump and spinning pump, increase the back pressure of the extruder, and thereby facilitate the exhaust and plasticizing of the material during compression. The second filter (fine filter) is installed in the spinning assembly. Its main function is to filter out finer impurities, crystal points, etc., prevent the spinneret from clogging, ensure the smooth progress of spinning, and improve the quality of the fibers.
Main Features
- 1 High filtration flow rate by good pleated technology
- 2 Particle filtration performance well by multiple filter layers
- 3 Corrosion resistance; High Temperature And Pressure Resistance
- 4 Filter element is washable by ultrasound
Specification
The melt filter element is a kind of rod-shaped structure which sintered from five layers of metal wire mesh. At the center of the rod is a reinforcing skeleton, which withstands the pressure during filtration. The initial pressure used for the filter element is 2.156×106Pa, and the pressure during switching is 8.33×106Pa. The filter elements come in several models such as X6, X7, X11, and X12, and the mesh diameters range from 20μm to 40μm.
ⓘ The pore size of the mesh is the filtration accuracy of the filter element.
| Filter Raw Material | SUS304/316L |
| Filter Media | Metal sintering mesh / Stainless steel wire mesh |
| Filtration Rating | 1–200 Micro |
| Filter Length | 16–60 inch (406.4–1524mm) |
| Working Temp. | ≤350℃ |
| Allowed Pressure Difference | 10 bar / 14 psi |
| Connector Type | 222 / 226 / 215 / M36 / M28 / M24 / M22 / M20 |
Note: We can provide high quality polymer pleated candle filters to meet your specific requirements of polymer melt filtration applications.
We list regular candle filter size as below — it is a popular size in melt filtration machines, just for reference only.
| DIAMETER MM | LENGTH MM | SUITABLE FOR FILTRATION MACHINE |
| Φ35 | 425MM | PF2T-0.5B / PF2T-1.05B / PF2T-1.95B / PF2T-2.34B |
| Φ35 | 485MM | PF2T-1.26B / PF2T-2.34B / PF2T-2.7B / PF2T-3.5B |
| Φ35 | 525MM | PF2T-4.0B |
| Φ35 | 575MM | PF2T-4.5B / PF2T-5.5B |
| Φ50 | 500MM | PF2T-4.5B / PF2T-5.5B |
Frequently Asked Questions
Q
What is the difference between the coarse filter and the fine filter in spunbonded nonwoven production?
The coarse filter (first filter) is installed between the screw extruder and the metering pump. It removes larger impurities to protect downstream equipment and increase back pressure. The fine filter (second filter) is placed in the spinning assembly to remove finer impurities and crystal points, preventing spinneret clogging and ensuring high-quality fiber production.
Q
What materials are used to manufacture the candle filter elements?
The candle filter elements are made from SUS304 or 316L stainless steel, using metal sintering mesh or stainless steel wire mesh as the filter media. The five-layer sintered structure provides excellent strength and filtration performance.
Q
What is the maximum working temperature and pressure these filter elements can withstand?
The candle filter elements can operate at temperatures up to 350℃. The initial operating pressure is 2.156×10⁶ Pa, and the pressure during switching is 8.33×10⁶ Pa. The allowed pressure difference is 10 bar (14 psi).
Q
What filtration accuracy do the candle filter elements offer?
The filtration rating ranges from 1 to 200 microns. The mesh pore size directly determines the filtration accuracy. Common models such as X6, X7, X11, and X12 offer mesh diameters ranging from 20μm to 40μm to suit various polymer melt filtration requirements.
Q
Can the candle filter elements be cleaned and reused?
Yes. The filter elements are washable using ultrasonic cleaning technology, which makes them suitable for repeated use. This helps reduce operating costs and extends the service life of the filtration system.
Q
Can you customize candle filters to match specific filtration machine models?
Yes. We offer a range of standard sizes (e.g., Φ35 and Φ50 diameter with lengths from 425mm to 575mm) compatible with popular melt filtration machines such as PF2T series. Custom specifications are also available to meet your specific polymer melt filtration application requirements.