Factory-direct wholesale supply of micron-rated stainless steel screens, polymer candle filters, and leaf discs engineered for seamless extrusion performance.
As global plastic processing, polymer synthesis, and chemical fiber manufacturing shift toward hyper-efficiency and stringent ESG circular economy standards, the requirement for ultra-precise stainless steel mesh filtration has reached unprecedented levels.
Modern polymer melts operate under extreme hydrostatic pressure (up to 35 MPa) and elevated processing temperatures exceeding 330°C. Standard woven screens fail under shear stress, leading to screen blow-outs, melt channeling, and catastrophic downtime. Premium stainless screens maintain absolute structural rigidity.
In BOPP/BOPET optical film extrusion and spunbond nonwoven manufacturing, sub-micron particulates or micro-gels induce film breakage, pinholes, and uneven tensile strength. Precision stainless screens trap cross-linked polymers, black specs, and un-melted additives with surgical accuracy.
Post-consumer recycled (PCR) plastics (PET, HDPE, PP) contain high contamination loads including paper fibers, foreign polymers, and inorganic grit. Advanced continuous screen changers equipped with multi-layer sintered stainless mesh allow continuous granulating without frequent manual screen swaps.
Selecting the appropriate stainless steel alloy and weave geometric profile directly impacts differential pressure ($\Delta P$), dirt-holding capacity (DHC), and overall melt line efficiency.
AISI 304 Stainless Steel: Provides exceptional tensile strength and cost-effective oxidation resistance up to 800°C. Ideal for general polyolefin (PE, PP) extrusion and non-corrosive thermoplastic processing.
AISI 316L Stainless Steel: Formulated with 2-3% Molybdenum and low carbon content (<0.03%). Delivers superior resistance to pitting, crevice corrosion, and organic acid attack during halogenated polymer (PVC, PVDF) or PET polycondensation extrusion.
Multi-Layer Sintered Wire Mesh: Vacuum-sintered diffusion bonding of 5 to 7 layers of wire cloth. Combines micro-filtration accuracy with robust coarse backing layers for zero layer migration under high shear force.
Sintered Stainless Steel Metal Fiber Felt: Non-woven 3D labyrinth structure featuring up to 85% porosity. Delivers 3x longer operational lifespan and significantly lower initial pressure drops compared to traditional wire mesh screens.
| Filter Media Type | Material Grade | Micron Rating Range | Porosity % | Max Temp (°C) | Primary Industrial Application |
|---|---|---|---|---|---|
| Plain Dutch Weave Mesh | SUS 304 / 316 | 10 μm – 250 μm | 35% – 45% | 650°C | Extruder Screen Packs, Standard Recycled Granulation |
| Twilled Dutch Weave Mesh | SUS 316L | 5 μm – 80 μm | 30% – 40% | 700°C | Fine Polymer Extrusion, Masterbatch Production |
| Multi-Layer Sintered Mesh | SUS 316L | 2 μm – 100 μm | 40% – 50% | 800°C | BOPP / BOPET Film Lines, Continuous Screen Changers |
| Sintered Metal Fiber Web | SUS 316L / Fecralloy | 1 μm – 60 μm | 75% – 85% | 900°C | High Viscosity Polymer Melt Candles, Spunbond Fiber Spinning |
Customized stainless screening solutions tailored to the operational parameters of leading global extrusion machinery OEMs and processing facilities.
Prevent optical gel defect buildup and thickness variance in high-speed barrier packaging film production using precision rimmed disc screens and leaf disc filters.
Ensure filament uniformity and eliminate spinneret nozzle clogging with ultra-fine pleated candle filter cartridges operating under continuous thermal cycling.
Equip heavy-duty pelletizing extruders with spot-welded multi-layer mesh packs capable of filtering high-debris PCR flake streams without pressure surges.
Achieve long-term continuous melt filtration for Polyester (PET), Polyamide (Nylon 6/66), and Polypropylene filament extrusion lines.
As a leading international exporter, Pujiang HG Plastic Machinery Co., Ltd. enforces zero-defect quality assurance protocol backed by full traceability and certified compliance.
Every batch of stainless mesh undergoes bubble point testing (ISO 4003), absolute air permeability evaluation, and alloy spectrographic verification (PMI testing) to ensure exact chemical composition and pore dimension integrity.
Fully compliant with US FDA 21 CFR 177.2600, EU 10/2011 food-contact plastic processing standards, RoHS 3, and REACH requirements for medical-grade and food packaging extrusion lines.
Dedicated technical support hubs across Europe, North America, Southeast Asia, and the Middle East provide rapid custom engineering design, housing retrofit audits, and on-site operational troubleshooting.
Empowering modern smart factories through advanced materials science and AI-integrated filtration diagnostic systems.
Our engineering division is developing sub-micron stainless steel fiber felts engineered for ultra-high purity optical polymers used in EV display panels and solar photovoltaic encapsulation sheets, achieving 0.5 μm absolute retention without flow restriction.
To minimize operational expenditure, our reusable stainless candle filter cartridges and leaf discs are designed for multi-cycle thermal cleaning via TEG (Triethylene Glycol) boiling, vacuum pyrolysis, or high-frequency ultrasonic backwashing, offering up to 20+ reuse cycles.
Answers to critical engineering queries regarding stainless screen selection, structural resistance, wholesale ordering, and custom manufacturing.
SUS 304 is ideal for standard, non-corrosive thermoplastic polymers (such as Polyethylene and Polypropylene) operating at normal extrusion temperatures. SUS 316L contains Molybdenum and low carbon, making it essential for corrosive environments, halogenated polymers, high-acid PET resins, or applications requiring aggressive chemical cleaning.
Spot-welded screen packs combine multiple mesh densities (e.g., 20 mesh / 80 mesh / 150 mesh / 20 mesh) into a single rigid unit. The coarse outer layers provide mechanical structural support against high melt pressure, while the fine interior mesh captures microscopic impurities, preventing wire distortion and operator insertion errors.
Yes. We specialize in OEM/ODM custom dimensional manufacturing. Our engineering team can replicate or optimize candle filter elements according to your specific drawings or physical samples, including specialized end-cap adapters, threaded connections, NPT/BSP fittings, and custom length configurations.
Depending on raw material cleanliness and melt contamination levels, sintered metal fiber felt elements typically operate continuously for 30 to 90 days before reaching maximum differential pressure limit ($\Delta P$). Because they are crafted from 316L alloy, they can be cleaned via thermal pyrolysis and reused multiple times.
By maintaining smooth hydraulic flow paths and low initial differential pressure drops, high-porosity stainless screens reduce localized melt stagnation and frictional shear heating, preventing thermal oxidation, degradation, and cross-linked gel generation.
All wholesale shipments are backed by Material Test Reports (MTRs) according to EN 10204 3.1 standards, bubble-point test certificates, ISO 9001:2015 quality compliance documentation, and export-compliant protective packaging.
Explore our global export catalog of SUS 304/316 candle elements, wire mesh screen packs, and plastic recycling equipment.
Request custom engineering blueprints, micron porosity samples, or wholesale volume pricing directly from our senior technical engineering team.
