Famous Candle Filter Cartridge for Polymer Melt in Spunbond Nonwoven Production | China Suppliers & Factory Manufacturer, Company

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The polymer melt filter is an essential component of filtration equipment utilized in high-speed spinning, fine denier spinning, and nonwoven fabric production in China. As a premium filter, it effectively eliminates impurities and unmelted particles from polymer melts, ensuring the protection of spinnerets and enhancing overall product quality. This advanced filtration system consists of both coarse and fine filtration devices. The coarse filtration system is strategically positioned between the screw extruder and the metering pump, while the fine filtration device is integrated within the spinning assembly. Our filter element, constructed through the sintering of five layers of metal wire mesh, offers exceptional resistance to high temperatures and pressures. We take pride in being a leading supplier and factory of polymer melt filters, catering to the needs of the textile and manufacturing industries.

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Product Description

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
  • High filtration flow rate by good pleated technology
  • Particle filtration performance well by multiple filter layers
  • Corrosion resistance; High Temperature And Pressure Resistance
  • Filter element is washable by ultrasound
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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 a candle filter used for in spunbonded nonwoven fabric production?
Candle filters are used to remove impurities from polymer melts during the spinning process. They help prevent filament breakage, material dripping, and spinneret clogging, ensuring smooth and high-quality fiber production.
Q What materials are the candle filter elements made from?
The filter elements are made from SUS304 or SUS316L stainless steel, using sintered metal wire mesh with five layers. The central reinforcing skeleton provides structural strength to withstand high filtration pressures.
Q What is the filtration accuracy range of these candle filters?
The filtration rating ranges from 1 to 200 microns, and the mesh diameters of the filter elements typically range from 20μm to 40μm, depending on the model (X6, X7, X11, X12, etc.).
Q Can the candle filter elements be cleaned and reused?
Yes, the filter elements are washable using ultrasonic cleaning methods, making them suitable for repeated use and helping to reduce operational costs over time.
Q What are the maximum working temperature and pressure conditions for these filters?
The candle filters can operate at temperatures up to 350℃ and withstand an allowed pressure difference of 10 bar (14 psi), making them suitable for demanding high-temperature polymer melt filtration environments.
Q Can you supply custom-sized candle filters for specific melt filtration machines?
Yes, custom sizes and specifications are available. In addition to the standard sizes listed (Φ35 and Φ50 with various lengths), high-quality polymer pleated candle filters can be manufactured to meet your specific polymer melt filtration application requirements.

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