Explore our premier selection of SUS304/316L candle filters, screen meshes, and pelletizing systems engineered for continuous operation.
Understanding the engineering challenges of fluid dynamics, thermal stability, and micron-level contamination removal in modern polymer manufacturing.
Polymer processing involves non-Newtonian fluids under severe thermal and mechanical stresses. High-viscosity melts such as Polyethylene Terephthalate (PET), Polyamide (PA6/PA66), and Polypropylene (PP) require filter media capable of resisting pressure differentials exceeding 25 MPa without structural deformation or pore compression.
Modern melt filtration must eliminate a diverse spectrum of impurities: degraded polymer gels, catalyst residues, cross-linked particles, and metallic shear debris. Precision-engineered pleated candle elements and multi-layer sintered metal felts ensure continuous gel breakdown and high dirt-holding capacity.
With global mandates driving the adoption of Post-Consumer Recycled (PCR) and Post-Industrial Recycled (PIR) resins, filtration systems must process higher particulate burdens. Custom screen mesh changers and continuous CPF systems are vital to prevent spinneret clogging and film rupture.
Precision metallurgy, vacuum sintering technology, and structural integrity tailored for extreme operational environments.
Sintering is the core process that transforms woven stainless steel wire mesh into a rigid, non-migrating filter matrix. By applying high temperatures just below the melting point in a controlled vacuum furnace, atomic diffusion binds adjacent wire intersections. This yields fixed pore geometries, uniform permeability, and zero media migration under high differential pressure.
Our factory utilizes multi-layer sintered mesh combinations (ranging from 3-layer protection screens to 5-layer laminate structures) and sintered metal fiber felts. Sintered fiber felts offer up to 80% porosity, delivering significantly lower initial pressure drop and up to three times the dirt-holding capacity of traditional woven wire mesh.
Selecting the optimal alloy is crucial to prevent intergranular corrosion and stress-cracking under prolonged thermal exposure (280°C–340°C).
| Alloy Grade | Key Metallurgy | Primary Application | Corrosion & Temp Resistance |
|---|---|---|---|
| SUS 304 / 304L | 18% Cr / 8% Ni | Standard Polyolefin Extrusion & Granulation | Good up to 300°C; Standard non-corrosive melts. |
| SUS 316 / 316L | 16% Cr / 10% Ni / 2% Mo | PET/PA Fiber Spinning & BOPET Film Lines | Superior resistance to organic acids & thermal degradation. |
| Hastelloy C-276 | Ni-Mo-Cr + W | Fluoropolymer & Specialty Chemical Melts | Extreme chemical resistance against acidic polymers. |
Why global polymer producers rely on Pujiang HG Plastic Machinery for OEM/ODM excellence and speed-to-market.
From raw wire drafting and precision weaving to vacuum sintering, CNC machining of core hardware, plasma welding, and final ultrasonic bath purification—our entire manufacturing process is housed in-house in Zhejiang, China. This ensures rigorous control over dimensions, grain structure, and surface roughness.
Leveraging China's mature industrial ecosystem allows us to offer premium grade SUS304 and SUS316L filter elements at competitive price points. Clients experience a 30% to 50% cost reduction compared to European OEMs while maintaining identical operational lifespans and bubble-point performance specs.
Every continuous polymer filter system is unique. Our dedicated CAD/CAM engineering team turns customer technical drawings, physical samples, or custom housing specifications into verified prototype filter elements within 14 days, minimizing downtime for plant upgrades.
How our filtration products optimize operational throughput across diverse industrial installations worldwide.
Scenario: A leading biaxially-oriented film manufacturer in Southeast Asia faced frequent film snapping and pinhole defects caused by micro-gel contaminants passing through legacy wire mesh screens.
Engineered Solution: Installation of HG Win Series Leaf Disc Filters with 5-micron rated 316L multi-layer sintered metal fiber media. The extended surface area reduced melt shear rate and operational pressure drop by 22%.
Outcome: Continuous operational line runtime extended from 18 days to 45 days per filter cycle, yielding an annual resin scrap reduction of over 60 metric tons.
Scenario: A synthetic yarn manufacturer in Turkey experienced short spinneret pack lifespans and frequent filament breakages during high-speed POY/FDY spinning operations.
Engineered Solution: Implementation of Custom High-Viscosity SUS316L Pleated Candle Filter Cartridges. The pleated design expanded effective filtration surface area by 300% compared to smooth cylindrical filters of identical dimensions.
Outcome: Spin-pack pressure remained stable for over 60 days. Thread break rates decreased by 40%, delivering noticeable improvements in yarn tenacity and elongation uniformity.
Scenario: A European plastic recycling facility processing post-consumer HDPE/PP bottle flakes struggled with rapid clogging of continuous screen changers due to paper pulp, wood flour, and dirt residues.
Engineered Solution: Deployment of HG ODM Plastic Pelletizing Machines integrated with heavy-duty SUS304 Extruder Screen Mesh Filters and continuous back-flush screen changers.
Outcome: Continuous automated pelletizing without line shutdown. The output pellet purity met virgin resin blending standards for non-food packaging applications.
Scenario: Medical and hygiene grade PP spunbond nonwoven lines required ultra-clean melt streams to avoid filament defects and ensure soft hand-feel texture.
Engineered Solution: High-precision 10-micron Candle Filter Cartridges constructed with graded density sintered fiber felt cores and protective mesh outer sleeves.
Outcome: Elimination of web defects and pressure surges in the melt distribution manifold, securing full compliance with medical-grade fabric specifications.
Pioneering next-generation filtration technologies designed for smart factories, extreme pressure environments, and zero-emission recycling.
We are integrating selective laser melting (SLM) metal 3D printing to create internal fluid channels with zero dead zones. This enables custom flow distribution within filter cores, reducing residence time distribution (RTD) and eliminating polymer thermal degradation traps.
Future candle filter assemblies are being equipped with embedded high-temperature micro-transducers. Real-time differential pressure (ΔP) data streams directly to plant SCADA systems, using AI predictive algorithms to schedule filter cleaning before melt quality degrades.
To maximize sustainability, we are rolling out advanced TEG (Triethylene Glycol) boiling combined with vacuum pyrolysis ovens and multi-frequency ultrasonic baths. This non-destructive cleaning protocol allows candle filter elements to be reused up to 15–20 times while restoring 98%+ of initial clean pressure drop values.
Meeting international quality benchmarks to ensure seamless operational compliance across North American, European, and Asian markets.
Rigorous quality management systems govern raw material inspection, dimensional tolerances, plasma welding integrity, and final shipment packaging.
Every single candle filter and leaf disc undergoes ISO 4003 bubble point testing to guarantee absolute pore rating accuracy and zero welding flaws prior to factory dispatch.
All stainless steel alloys, seals, and structural components strictly comply with European Union chemical directives, making them safe for food-contact film and pharmaceutical packaging production.
Filter core collapse ratings are calculated in accordance with DIN and ASME pressure vessel standards, ensuring high burst resistance under high ΔP emergency conditions.
Discover customized filter cartridges, leaf discs, extrusion screens, and complete recycling lines engineered to your custom drawings.
Expert technical answers addressing engineering considerations, micron selection, maintenance protocols, and custom ordering.
