Explore our core engineering lineup designed for extreme operational pressures, low differential pressure ($\Delta P$), and maximum dirt holding capacity.
As global polymer manufacturing transitions toward ultra-thin barrier films, micro-denier synthetic fibers, and high-ratio post-consumer recycled (PCR) resin streams, melt filtration parameters have become the defining bottleneck for operational productivity.
Polymer melts (such as PET, PA66, PP, and BOPET) exhibit non-Newtonian, shear-thinning viscoelastic behavior under extreme processing temperatures (up to 340°C) and hydraulic pressures (up to 300 bar). Standard filtration media suffer from media deformation and local shear spikes, leading to polymer thermal degradation, gel formation, and pinhole defects in extruded films.
Zero Melt Degradation GeometryMelt contaminants range from hard inorganic particles (catalyst residues, titanium dioxide agglomerates, silica) to deformable organic gels and degraded cross-linked polymer knots. Engineered ODM polymer candle filter cartridges utilize multi-gradient porosity to arrest hard particulates via surface interception while capturing soft gels within deep sintered matrix networks.
99.9% Absolute Micron EfficiencyUnplanned extrusion downtime costs operators tens of thousands of dollars per hour. By maximizing the available filtration surface area per volume unit—achieved through precision cylindrical pleating and optimized mesh layout—ODM polymer candle filters reduce initial initial pressure drop ($\Delta P_0$) and dramatically extend the cycle time before backwashing or filter replacement is mandated.
+40% On-Stream LifespanSelecting the precise metallurgical medium is critical for achieving optimal filtration efficiency, chemical resistance against acidic polymers (e.g., PVC, Fluoropolymers), and structural integrity under cyclic thermal expansion.
| Media Construction Type | Material Alloys Available | Porosity Rate (%) | Dirt Holding Capacity ($g/m^2$) | Primary Industrial Application | Cleanability & Reuse Cycle |
|---|---|---|---|---|---|
| Sintered Stainless Steel Fiber Felt | SUS 316L / SUS 304 / Hastelloy C-276 | 75% – 85% | High ($120 - 180\,g/m^2$) | BOPET/BOPP Film, PET Bottle Flake Extrusion | Excellent (TEG Hydrolysis, Calcination, Ultrasonic) |
| Multi-Layer Woven Wire Mesh (Pleated) | SUS 304 / 316 / 316L Stainless Steel | 50% – 65% | Medium ($60 - 90\,g/m^2$) | Spunbond Nonwovens, PP Masterbatch Extrusion | Good (Solvent Flushing, Ultrasonic Bath) |
| Multi-Layer Sintered Wire Mesh Laminate | SUS 316L / Inconel 600 | 40% – 55% | Moderate ($40 - 70\,g/m^2$) | High-Pressure Polymer Melt Pump Protection | Outstanding Structural Integrity against Pulsation |
| Porous Stainless Steel Powder Sintered | SUS 316L / Titanium Alloy | 30% – 45% | Surface Deposition Focus | Extreme Fine Gas/Fluid Monomer Filtration | Requires Rigorous Backwashing & Acid Pickling |
While standard SUS 304 provides cost-effective mechanical strength for non-corrosive polyolefins (LDPE, LLDPE, HDPE), ultra-low carbon SUS 316L is indispensable for polyester (PET) and polyamide (Nylon) processing. The addition of Molybdenum (2.0–3.0%) prevents intergranular corrosion during high-temperature thermal cleaning cycles.
Every customized polymer candle filter manufactured by Pujiang HG Plastic Machinery undergoes non-destructive Bubble Point Testing according to ISO 4003 standards. This guarantees pore size distribution uniformity and verifies the absence of micro-leaks or weld seams defects prior to factory dispatch.
End caps, adapter fittings, and core tubes are joined using state-of-the-art automated TIG or Electron-Beam welding without adding filler material. This eliminates chemical contamination risks and maintains mechanical collapse pressures exceeding 210 bar differential pressure ($\Delta P_{burst}$).
Pujiang HG Plastic Machinery Co., Ltd. provides comprehensive Original Design Manufacturing (ODM) services. We transform rheological parameters into high-performance engineered filter elements tailored to your existing filter vessels (e.g., Maag, Kreyenborg, Nordson, Seebach, and Fuji Filter systems).
We evaluate your polymer melt viscosity (Pa·s), melt temperature, throughput rate (kg/h), target removal micron rating ($3\,\mu m - 250\,\mu m$), and maximum allowable pressure drop ($\Delta P_{max}$).
Our engineering team models the internal perforated core tube, drainage wire mesh support layers, primary sintered fiber matrix, and outer protective shroud to ensure smooth laminar fluid flow without dead zones.
Components are precision CNC machined, pleat geometry is mechanically formed for uniform space distribution, and robotic TIG welding seals the assembly under cleanroom standards.
100% Quality Inspection: Dimensional verification, bubble point pore size test, pressure collapse testing, and raw material chemical analysis certificate (EN 10204 3.1) delivery.
Across North America, Europe, Asia-Pacific, and the Middle East, leading polymer processors rely on specialized ODM candle filter cartridges to maintain round-the-clock plant availability and rigorous product compliance.
For high-dielectric capacitor films ($2.0\,\mu m - 6.0\,\mu m$ thickness), even microscopic carbon specks or gel particles cause electrical breakdown and film tear-offs. Our SUS 316L sintered fiber candle filter elements deliver absolute retention at $3\,\mu m - 5\,\mu m$, ensuring zero line stoppages and flawless optical transparency.
Zero Pinhole Defect GuaranteeIn polypropylene (PP) hygiene nonwoven production, spinneret nozzle clogging causes costly filament breakage and denier inconsistency. Custom pleated candle filter cartridges provide extended surface area to trap degraded polymer thermal gels before reaching the spin pack assembly.
Extended Spin Pack Working LifePelletizing contaminated recycled PE, PP, and PET bottles involves abrasive paper residues, aluminum specks, and mixed polymer gels. Our heavy-duty ODM stainless steel wire mesh candle filters and screen mesh discs handle high dirt loadings while permitting multiple thermal cleaning cycles.
Circular Economy OptimizationCombining rigorous international quality standards with agile local engineering support, Pujiang HG Plastic Machinery empowers global industrial enterprises to optimize their Total Cost of Ownership (TCO).
Our manufacturing plant operates under ISO 9001:2015 certified quality systems. Material grades strictly conform to ASTM, DIN, and EN 10204 3.1 standards. Food-contact grade filtration elements comply with US FDA and EU 10/2011 regulations for packaging film production lines.
Located in Zhejiang Province, China (No. 18 Xiayang Road, Pujiang County, Jinhua City), we provide direct technical consulting, fast-track engineering drawing approvals within 24 hours, and emergency spare parts stocking for overseas industrial hubs.
We are actively researching nanostructured surface coatings (plasma titanium nitride) to reduce friction coefficients during melt filtration, alongside Computational Fluid Dynamics (CFD) simulation modeling to eliminate stagnation zones in custom filter housings.
In-depth technical answers regarding polymer candle filter selection, rheology management, cleaning protocols, and customization options.
Explore our extensive range of SUS 304/316 screen mesh, extruder packs, and specialized polymer candle elements.
