Engineered to strict OEM/ODM standards for plastic extrusion, polymer melt purification, and continuous recycling operations.
In high-viscosity polymer processing, continuous extrusion, optical-grade film manufacturing (BOPP, BOPET, BOPA), and synthetic fiber spinning, the demand for pristine polymer melt has escalated drastically. Modern processing plants operate under stringent thermodynamic and rheological parameters, where even sub-micron particulates, degraded gels, or carbonized cross-linked specs can cause catastrophic film breakage, spinneret clogging, or yield drops costing tens of thousands of dollars per hour of downtime.
As an OEM/ODM buyer or plant engineering director, selecting the appropriate Leaf Disc Filter System or Polymer Melt Filter Element is no longer merely a procurement decision—it is a critical process engineering requirement. Disc filter systems (often referred to as leaf disc filters or segment filter discs) offer significant geometric and operational advantages over traditional cylindrical candle filters or flat mesh packs. By stacking dual-sided filter segments around a central drainage hub, disc filter systems achieve an exceptionally high filtration surface area within a compact vessel footprint.
Optimized radial distribution channels inside the disc hub ensure minimal delta-P accumulation across viscosity ranges up to 50,000 Poise.
Multi-layered sintered stainless steel metal fiber media delivers dirt-holding capacities up to 300% higher than woven mesh screens.
Fully metallic SUS 316L construction enables multiple cleaning cycles (pyrolysis, TEG bath, ultrasonic wash) for minimal total cost of ownership.
A high-performance OEM Disc Filter segment relies on a sophisticated 5-layer or 7-layer vacuum-sintered architecture. The core support layer provides structural rigidity against high pressure differentials (up to 250 bar or 25 MPa), while fine inner mesh layers govern drainage efficiency. The outermost filtration media—typically 316L Stainless Steel Fiber Felt or Precision Sintered Wire Mesh—is engineered to capture deformably viscous gels and hard particulate contaminants down to 3–5 microns absolute.
Combining advanced CNC laser welding, automated bubble-point testing, and vertically integrated stainless steel sintering with unmatched manufacturing efficiency.
China’s localized stainless steel wire weaving and metal felt sintering ecosystem significantly reduces raw material costs without compromising DIN / ISO quality standards.
Custom disc hub configurations, outer diameter adjustments (e.g., 177mm, 305mm, 447mm), and specialized mesh weaves delivered within 10-14 days.
Every export-grade leaf disc undergoes ISO 2942 bubble-point integrity testing, ISO 3726 pressure drop verification, and micro-welding inspection.
A comprehensive technical comparison to assist engineering teams in selecting the optimal filtration architecture.
| Filtration Technology | Surface Area per Volume | Shear Rate Attenuation | Max Dirt-Holding Capacity | On-Stream Lifetime | Cleaning Recyclability |
|---|---|---|---|---|---|
| Leaf Disc Filter Systems | Highest (Compact multi-disc stack) | Excellent (Uniform radial distribution) | Up to 320 g/m² (Sintered felt) | 30 – 90 Days continuous | Outstanding ( TEG / Ultrasonic ) |
| Pleated Candle Filters | High (Axial pleat layout) | Moderate (Risk of inner pleat pinching) | 210 – 260 g/m² | 20 – 45 Days continuous | Good (Pyrolysis cleaning) |
| Flat Screen Mesh Packs | Low (Single dimensional area) | Poor (High pressure spikes) | 30 – 60 g/m² | 1 – 7 Days continuous | Single-use / Disposable |
| Continuous Screen Changers | Moderate (Breaker plate based) | Variable (Mechanism friction) | 80 – 120 g/m² | Automated continuous advance | Single-use mesh ribbons |
Extensive field deployments across demanding polymer processing and recycling plants worldwide.
Ultra-thin capacitor films and optical packaging require zero pinhole defects. OEM 177mm and 305mm leaf disc filter stacks equipped with 3μm sintered metal felt eliminate micro-gels and catalyst residues, ensuring uninterrupted high-speed line operation.
Recycling heavily contaminated PP/PE film flakes or PET bottle flakes demands robust filtration elements. Reinforced stainless steel wire mesh disc filters effectively trap paper pulp, aluminum flecks, and unmelted polymers during high-capacity pelletizing.
In polyester and nylon filament spinning, pressure fluctuations lead to thread breaks. High-porosity segment disc filters provide stable pressure control upstream of the spin pack pump, guaranteeing uniform denier quality.
As global circular economy directives accelerate the shift toward rPET, biodegradable polymers (PLA, PBAT), and bio-based plastics, disc filter OEMs are innovating advanced media treatments. Key developments include hydrophobic/oleophobic surface coatings, asymmetric pore-gradient sintered felts, and automated inline laser diagnostic systems.
Explore our complete catalog of OEM leaf disc filters, high-viscosity candle elements, and plastic granulating solutions.
Expert answers to critical engineering, manufacturing, and sourcing questions regarding OEM Disc Filter Systems.
Leaf Disc Filters provide a significantly higher filtration area within a shorter axial vessel length compared to candle filter cartridges. The radial flow configuration of disc filters ensures uniform polymer residence time, which prevents thermal degradation in heat-sensitive polymers such as PET, PA66, and PLA. Additionally, leaf disc stacks allow precise control over shear rates, reducing gel breakdown under high viscosity conditions.
Depending on the contamination type and cleaning protocol (such as TEG solvent boiling, vacuum pyrolysis, or high-frequency ultrasonic baths), high-quality SUS 316L sintered metal felt disc filters can typically undergo 10 to 20 cleaning cycles before experiencing structural degradation or irreversible pore clogging.
We offer customized filtration ratings ranging from 3 microns to 200 microns absolute. For optical BOPET film and continuous filament spinning, 3μm to 10μm sintered fiber felt media is standard. For plastic pelletizing and post-consumer recycling lines, 20μm to 150μm woven wire mesh disc elements are most commonly specified.
All filter elements are manufactured under ISO 9001 certified quality control procedures. Each production batch undergoes bubble point testing (ISO 2942) to verify pore uniformity, differential pressure testing (ISO 3968), and dimensional tolerance verification to ensure seamless integration with major European and North American filter housings.
To provide an accurate technical proposal and quotation, please supply: 1) Polymer type and operating viscosity, 2) Processing temperature and maximum pressure rating, 3) Required filtration rating (micron size), 4) Disc geometry dimensions (outer diameter, inner hub diameter, spline count), and 5) Estimated annual volume or batch size.
