Explore our flagship OEM/ODM melt filtration components engineered for severe-service polymer processing, continuous chemical fiber spinning, and precision film extrusion.
In modern high-viscosity polymer processing, continuous melt purification is the primary safeguard for downstream melt-blown nonwovens, BOPA film extrusion, and high-tenacity filament yarn production. A standard single-housing failure or micro-pore rupture can trigger catastrophic line stoppage, costing thousands of dollars per hour in polymer thermal degradation and downtime.
As a globally recognized manufacturer and exporter, Pujiang HG Plastic Machinery Co., Ltd. engineers heavy-duty polymer candle filter elements constructed from multi-layer stainless steel (SUS 316L/304) wire mesh and vacuum-sintered metal fiber felt. These cylindrical filter candles feature high porosity, optimized fluid mechanics, and extreme resistance to pressure differential dynamics ($\Delta P \ge 25\text{ MPa}$).
Our candles deliver a 300% larger effective surface area compared to flat screens, maintaining thermal stability up to 350°C under severe continuous shear stress without channel degradation.
Choosing the correct filtration medium depends on polymer rheology, contamination loading, melt viscosity, and allowable pressure drop limit.
| Performance Parameter | 316L Sintered Fiber Felt Candle | Multi-Layer Pleated Wire Mesh Candle | Plain Cylindrical Screen Filter |
|---|---|---|---|
| Porosity & Void Volume | Up to 80-85% high void volume | 50-60% moderate void volume | 35-45% low void volume |
| Dirt Holding Capacity (DHC) | Extreme (3x higher than wire cloth) | Moderate to High | Standard / Low |
| Gel Trapping Capability | Superior (3D labyrinth pore depth) | Moderate (Surface barrier mechanism) | Low (Pass-through under high shear) |
| Initial Pressure Drop ($\Delta P_0$) | Very Low (Reduces pump energy) | Low | Moderate to High |
| Cleanability & Reusability | Excellent (TEG Hydrolysis / Calcination) | Good (Ultrasonic cleaning suitable) | Limited lifespan |
| Primary Application | BOPET/PET resin, PA66 filament spinning | Extruder screen changers, PP recycling | Low-spec virgin resin granulating |
Polymer melts exhibit non-Newtonian shear-thinning behavior. Our smooth transitional pore geometry prevents localized polymer stagnation, minimizing thermal degradation and gel formation.
With an increased effective filtration surface (via deep pleating and high porosity felt), system changeover cycles are extended by 1.5x to 3x, lowering operating expenditure.
Constructed using automated TIG micro-welding and plasma longitudinal seams without filler metals, guaranteeing zero cross-contamination and high structural fatigue strength.
Leveraging Zhejiang's world-class industrial cluster for precision filtration machinery, Pujiang HG Plastic Machinery Co., Ltd. bridges high-tier metallurgical engineering with cost-efficient global logistics.
We source top-grade stainless steel wire and fiber felt from accredited metallurgical mills, providing complete 3.1 material test certificates (MTC) for every batch. Materials include SUS 304, 316, 316L, Hastelloy C-276, and Inconel alloys to withstand severe corrosive organic acids and high heat.
Equipped with state-of-the-art vacuum sintering furnaces, multi-axis CNC pleating machinery, and automated bubble point testing rigs, our plant handles large-scale OEM standard contracts as well as custom low-volume prototype orders within short lead times.
Engineered for high-stress processing environments across diverse global manufacturing plants.
Deploys ultra-fine 5μm–10μm sintered fiber candle elements to trap gel particles, preventing pinholes and web tears during biaxial stretching.
Protects spinneret nozzles in PET/PA66 POY, FDY, and staple fiber spinning plants, ensuring uniform filament denier and zero filament breakage.
High-strength coarse mesh pleated candles handle heavy aluminum, paper, and paperboard particulate loads in post-consumer plastic granulators.
Ensures high-purity fluid extraction in aggressive chemical reactors operating under high temperatures up to 350°C and corrosive solvents.
Global enterprise procurement requires compliance with stringent international engineering standards. Pujiang HG Plastic Machinery maintains full adherence to modern QA protocols:
Integration of digital $\Delta P$ sensors and IoT melt pump telemetry to predict exact candle clogging thresholds, preventing unplanned thermal shutdowns.
Increased demand for hydraulic auto-backwash filter vessels requiring high mechanical fatigue-resistant candle filter elements.
Rising rPET and recycled polyolefin usage demands multi-tiered depth filtration to handle higher gel concentration and heterogeneous particulate contamination.
Clear answers to engineering, selection, and maintenance queries from plant managers and procurement officers.
Review our extended series of polymer extruder mesh screens, recycling machinery lines, and specialized stainless steel melt filter elements.
