Explore our top-grade OEM/ODM filtration elements and plastic pelletizing equipment engineered for peak operational longevity and minimal melt pressure drop.
Analyzing the technical synergies between high-purity polymer melt filtration media and automated plastic recycling pelletizing systems.
Founded in 2004, Pujiang HG Plastic Machinery Co., Ltd. has established two decades of specialized expertise in metallurgical filtration mesh, sintered candle elements, and complete plastic waste recycling production lines.
Engineered stainless steel (SUS 304/316L) micro-porous filter media capable of capturing sub-micron cross-linked gels, carbonized degradations, and non-melting inorganic particulates under high shear melt conditions.
Exporting advanced continuous screen changers, leaf disc filters, and turnkey PE/PP washing-pelletizing machinery to global plastic recyclers, chemical fiber spinners, and blown film manufacturers.
Leveraging Zhejiang's advanced industrial manufacturing cluster to deliver high-tier original design manufacturing (ODM) solutions with uncompromised metallurgical standards.
Unlike simple assembly facilities, our Pujiang manufacturing complex integrates wire drawing, precision mesh weaving, vacuum sintering, CNC machining, and automated plasma welding under one ISO 9001 quality management umbrella. This vertical alignment eliminates middleman overheads and grants absolute control over alloy purity (SUS 304, SUS 316L, Hastelloy) and weave uniformity.
Capitalizing on China's complete industrial supply chain for machinery components, gearbox reducers, motor drives, and hydraulic systems, we provide global OEM buyers with a 30% to 45% Total Cost of Ownership (TCO) advantage over European equipment brands without compromising structural longevity.
| Performance Indicator | Pujiang HG ODM Standard | Generic Commodity Suppliers | European OEM Benchmark |
|---|---|---|---|
| Filter Material Grade | Certified SUS 316L / SUS 304 / Hastelloy | Unverified SUS 201 / Recycled Metal | SUS 316L Standard |
| Sintering Bonding Strength | High-Temp Vacuum Diffusion (>35 MPa) | Basic Spot-Woven Mesh | Diffusion Bonded (>35 MPa) |
| Filtration Rating Precision | Absolute Micron (3μm - 200μm ± 5%) | Nominal Micron (High Variance) | Absolute Micron (3μm - 200μm) |
| Lead Time (Custom ODM) | 2 - 3 Weeks (Fast-Tracked) | 4 - 6 Weeks | 10 - 16 Weeks |
| TCO & Procurement Value | Optimal High-Yield Value Ratio | Low Initial Cost / High Failure Rate | High Capital Investment Cost |
Why Tier-1 plastic converters and recycling conglomerates prioritize custom engineering, operational stability, and life-cycle efficiency over initial purchase price.
Unplanned line stoppages on high-capacity BOPP film lines or synthetic fiber spinning towers cost tens of thousands of dollars per hour. Our CPF candle filters and leaf discs feature extended dirt-holding capacity (up to 40% higher surface area per element), directly prolonging on-stream life cycles and reducing screen-change frequency.
HG polymer filter elements are specifically optimized for chemical calcination, pyrolysis, and ultrasonic cleaning backwashing. Constructed with robust SUS 316L wire mesh and multi-layer sintered felt, our elements maintain structural pore integrity through 10 to 15 cleaning cycles, dramatically slashing consumable replacement budgets.
Polymer melt behaves as a non-Newtonian, high-viscosity fluid under shear stress. HG's engineering team utilizes proprietary fluid flow simulations to model filter channel geometries—eliminating melt dead zones, preventing polymer thermal degradation, and ensuring uniform pressure distribution across all active filter media.
A detailed examination of machine subsystems required to process contaminated waste plastics into ultra-pure, high-grade polymer granules.
The plastic recycling journey begins with mechanical transformation. Post-consumer film (LDPE/LLDPE), agricultural films, or rigid bottles (HDPE/PP) undergo multi-stage heavy-duty shredding, high-speed friction washing, and sink-float separation tanks. This process strips away surface dirt, paper labels, adhesives, and organic debris.
Our integrated mechanical lines incorporate wear-resistant SKD-11 alloy blades, dynamic balancing rotors, and closed-loop water filtration units that ensure washed plastic flakes possess a moisture content below 1.5% prior to extrusion charging.
Once fed into the single or twin-screw pelletizing extruder, recycled polymer flakes undergo melting, compression, and intense shear mixing. To prevent pinholes and bubble defects in secondary converted products, dual-vacuum zone degassing systems forcefully extract trapped moisture, low-molecular volatiles, and printing ink gases.
Precision L/D ratios (30:1 to 36:1) and specialized screw flight geometries guarantee thermal melt homogeneity, preventing localized polymer overheating and chain degradation during continuous processing.
Before reaching the die face cutter, the molten polymer passes through high-pressure screen changers or continuous candle filter housings fitted with SUS 304/316 wire mesh elements. For contaminated PCR feeds, hydraulic double-piston backflush screen changers clean contaminated screen areas automatically without interrupting production flow.
In high-end film or chemical fiber applications, polymer melt candle filters provide an expansive filtration area (up to 10 square meters per housing), removing micro-particles down to 5 microns.
The final stage converts pure melt into uniform plastic pellets via water-ring or underwater pelletizing dies. Hydro-dynamic cutter head speed controls granule diameter (typically 2.5mm to 3.2mm), while rapid water quenching locks in resin crystallinity and optical clarity.
Centrifugal dewatering sieves and air-conveying silo systems store the finished recycled granules, ready for immediate re-injection into film blowing, pipe extrusion, or injection molding operations.
How evolving regulatory frameworks and eco-design directives are shaping next-generation melt filtration and plastic recycling technologies.
With the European Union's Packaging and Packaging Waste Regulation (PPWR) setting strict targets for mandatory post-consumer recycled (PCR) content in packaging (up to 30% by 2030), plastic converters are forced to process lower-grade feedstock. This shift makes ultra-fine polymer melt filtration (leaf discs and candle elements) an absolute necessity for preventing continuous film breaks.
Modern ODM plastic recyclable machines feature real-time melt pressure differential sensors, automated hydraulic screen changers, and IoT-enabled predictive maintenance alarms. Real-time telemetry notifies operators of filter cake accumulation, optimizing backflush cycles and conserving energy consumption across the plant floor.
Energy represents over 35% of operational expenses in plastic pelletizing plants. Modern HG recycling extruders utilize ceramic infrared heater bands, electromagnetic induction barrel heating, and IE4 super-premium efficiency motor drives—reducing specific energy consumption to below 0.28 kWh per kilogram of processed plastic resin.
From Southeast Asian agricultural film processing to European PET bottle-to-bottle decontamination lines.
Challenge: Severe contamination from residual silica sand, calcium carbonate fillers, and woven bag printing inks caused rapid screen clogging and frequent knife damage in pelletizing systems.
Solution: Implementation of an HG double-stage cutter-compactor pelletizing line equipped with heavy-duty dual-piston continuous hydraulic screen changers and SUS 304 multi-layer woven mesh filter elements (80 mesh / 120 mesh / 80 mesh combination).
Result: Pelletizing line achieved non-stop 24/7 continuous operation, boosting monthly yield by 38% while reducing screen-change downtime by 75%.
Challenge: Microscopic gel particles (< 20 microns) were causing film pinholes and tear fractures on high-speed 500 m/min film casting lines.
Solution: Custom installation of HG 10-micron absolute-rated SUS 316L sintered metal fiber candle filter cartridges placed inside high-pressure CPF housings upstream of the die block.
Result: Eliminated line tear incidents, elevated film optical clarity to premium grade, and extended filter pack lifecycle to over 60 days of uninterrupted operation.
Ensuring full operational safety, environmental compliance, and rapid engineering response across global industrial markets.
All HG plastic recycling machines and pressure vessels adhere strictly to EU Machinery Directive 2006/42/EC, Low Voltage Directive 2014/35/EU, and ISO 9001:2015 quality management benchmarks. Pressure vessel filter housings comply with PED 2014/68/EU certification for high-pressure safety assurance.
We provide overseas commission engineering, line optimization, and maintenance staff training. Through localized service partners in Southeast Asia, the Middle East, and Europe, clients receive emergency spare parts dispatch within 48 hours.
To eliminate supply chain bottlenecks, HG offers tailored annual consumable buffer stocking contracts. We maintain safety inventory levels of your custom leaf discs, extruder wire mesh screens, and CPF candle filters in strategic logistics hubs for rapid call-off delivery.
Browse our high-capacity OEM candle elements, multi-layer extruder wire meshes, and specialty filtration components.
Expert technical responses to key engineering, compliance, and custom manufacturing inquiries.
