Explore our top-tier stainless steel filtration media, custom candle cartridges, leaf discs, and polymer pelletizing equipment crafted for zero-defect continuous production.
A comprehensive evaluation of polymer melt filtration, thermal resistance dynamics, and mechanical integrity in modern continuous processing environments.
In modern industrial extrusion, nonwoven fabric manufacturing (Spunbond & Meltblown), BOPP/BOPET film stretching, and petro-chemical resin compounding, the stainless filter screen serves as the central guardian of product purity and line continuity. Under extreme process parameters—where molten polymers flow under pressures exceeding 25–30 MPa and temperatures above 300°C—minor particulate contamination, gels, degradation specks, or cross-linked polymers can trigger catastrophic thread breakages, film pinholes, or die clogging.
As a famous stainless filter screen manufacturer and direct China factory, Pujiang HG Plastic Machinery Co., Ltd. combines over two decades of metallurgical expertise with precision vacuum sintering and micro-weaving technologies. Our filtration elements are engineered to eliminate shear stress degradation while delivering unmatched void volume, enabling extended on-stream lifetime and drastically lower operational Total Cost of Ownership (TCO).
Understanding material selection, grain structure, and sintered mesh vs. woven wire performance characteristics under extreme industrial conditions.
While SUS 304 offers excellent structural rigidity and baseline corrosion resistance for standard olefin extrusion (PP, PE), SUS 316L (Low Carbon) includes 2-3% Molybdenum. This provides essential resistance against pitting corrosion and intergranular degradation when processing corrosive fluoropolymers, recycled PET, or halogenated additive mixes.
By diffusion-bonding multiple layers of fine woven wire mesh under high-temperature vacuum sintering, the resulting structure achieves extreme mechanical strength. The inner control layer establishes exact micron precision, while outer protective and drainage layers shield against high differential pressure collapses up to 21 MPa.
Constructed from non-woven stainless steel micro-fibers, sintered fiber felt provides an extraordinary porosity rate of up to 75–85%. This massive void volume delivers 3x to 5x higher contaminant holding capacity than conventional woven wire screens, minimizing pressure drop ($\Delta P$) escalation over time.
| Filter Element Type | Material Alloy Grades | Porosity Rate (%) | Micron Rating Range | Cleaning & Reusability | Primary Industrial Use Case |
|---|---|---|---|---|---|
| Plain Woven Wire Mesh Pack | SUS 304 / 316 | 35% - 45% | 20μm - 500μm | Single Use / Light Clean | Standard Extruder Screen Changers |
| 5-Layer Sintered Mesh Disc | SUS 316L / Incoloy | 50% - 60% | 5μm - 100μm | High (Ultrasonic/Calcination) | BOPP / BOPET Film Extrusion Lines |
| Sintered SS Fiber Felt Candle | AISI 316L Fiber | 75% - 85% | 1.5μm - 60μm | Ultra-High (>20 Cycles) | Spunbond Nonwoven & Melt Spinning |
| Pleated Stainless Candle Cartridge | SUS 304 / 316L | 65% - 75% | 3μm - 150μm | High (Chemical/Pyrolysis) | High-Viscosity Polymer CPF Systems |
Unpacking the technological, supply chain, and cost efficiencies of sourcing directly from Zhejiang's premier filter manufacturing cluster.
Unlike secondary assembly vendors, our Pujiang manufacturing facility maintains complete in-house authority over every production tier. From precision wire drawing, weaving, and multi-layer CNC stamp shearing to vacuum furnace diffusion bonding (>1050°C vacuum sintering) and automated plasma seam welding, we guarantee zero cumulative tolerance errors.
Our ISO9001:2015 certified quality control laboratory enforces strict Bubble Point Tests (ASTM F316-03), absolute filtration rating verifications, and differential collapse pressure testing on every batch prior to export delivery.
Global plastic machinery OEMs and polymer processing giants face mounting pressure to reduce operational expenditure without sacrificing melt quality. Sourcing directly from our China factory provides access to state-of-the-art European-grade stainless filter screens at competitive direct-to-factory price points.
Our modular tooling inventory enables swift OEM customization for non-standard housing dimensions, custom flange connectors, bayonet fittings, or multi-hub leaf disc stacks within 7 to 14 business days.
Tailored filtration architectures solving complex shear, temperature, and contaminant challenges across key manufacturing sectors.
In high-speed PP/PET spunbond nonwoven manufacturing, spinneret hole diameters range from 0.15 to 0.6 mm. The slightest particulate contaminant causes filament snapping, leading to costly line shutdowns. Our CPF Sintered Candle Filter Cartridges deliver 5μm to 15μm absolute rating protection, engineered with uniform pore distributions that stabilize melt pressure profiles directly upstream of the spin pack.
Biaxially-oriented film production lines operate at speeds over 500 m/min. Microscopic gels or black specks cause film tears during transverse stretching. Our Sintered Leaf Disc Filters (Hard & Soft Pack) feature seamless outer rim welding and hub seals. They eliminate fluid dead zones, ensuring smooth laminar melt flow and defect-free optical clarity.
Recycling PP/PE waste flakes introduces severe abrasive contaminants, paper fibers, and aluminum specks. Standard mesh quickly tears under continuous shear. We supply high-tensile SUS 304/316 Spot-Welded Screen Packs & Continuous Belt Screens designed specifically for automatic hydraulic screen changers, providing robust continuous melt filtration.
High-temperature chemical synthesis involves aggressive organic solvents, high-viscosity resins, and steam backflushing cycles. Our multi-pleated all-welded stainless steel cartridges eliminate adhesive bonding agents, delivering 100% material compatibility across aggressive chemical media up to pH 1–14.
Standardizing supplier evaluation criteria and extending hardware service lifecycles through scientific cleaning protocols.
Factory-direct CPF candle elements, high-viscosity filter cartridges, leaf discs, and granulating machinery engineered for immediate global dispatch.
Direct answers to critical technical questions regarding stainless filter screen selection, micron ratings, pressure resistance, and custom manufacturing.
Nominal rating indicates an arbitrary micronic value representing a percentage retention (e.g., 60% to 80%) of solid particles of a given size. In contrast, Absolute Micron Rating specifies the exact size of the largest spherical glass bead or particle that will pass through the filter under standard laboratory bubble point tests (ASTM F316-03), achieving 99.9% filtration efficiency. For polymer melt filtration, absolute ratings are mandatory to prevent micro-gel passage.
Traditional loose woven wire packs are susceptible to wire displacement, media migration, and layer shifting under fluctuating pump differential pressures (>10 MPa). Sintered mesh bonds wire intersections at microscopic contact points via thermal diffusion. This provides fixed pore geometry, zero wire movement, superior mechanical strength under extreme shear, and the ability to withstand multiple ultrasonic or calcination cleaning cycles without structural degradation.
Depending on the contaminant profile and the cleaning method applied (such as TEG pyrolysis or calcination followed by hydro-jetting and ultrasonic baths), a high-quality SUS 316L sintered fiber felt candle filter manufactured by Pujiang HG can be regenerated between 15 to 25 times while retaining over 90% of its initial clean differential pressure ($\Delta P$) performance.
For recycling post-consumer polyolefins (PP, PE, PET), SUS 304 provides an economical baseline. However, if the recycled feed contains PVC contaminants, flame retardants, or acidic degrading additives, SUS 316L or 904L is strongly recommended to prevent chlorine-induced pitting corrosion and stress cracking under high temperature extrusion.
Yes. We specialize in OEM and ODM customization. We can manufacture leaf disc filters (Hard Pack / Soft Pack), polymer candle cartridges, and screen packs that precisely match dimensions, hub connections, outer diameters, and pressure drop specifications for all major global filter housing manufacturers (including Maag, Kreyenborg, Nordson BKG, and Seebach equivalents).
