Direct from Chinese advanced manufacturing lines: fully qualified SUS304/SUS316L candle filters, leaf disc assemblies, and granulating units engineered to international technical specifications.
Modern polymer melt filtration has evolved far beyond basic screen changers. In continuous compounding, micro-denier synthetic fiber extrusion, BOPET/BOPP optical film casting, and nonwoven spunbond processing, polymer melt behaves as a non-Newtonian viscoelastic fluid under extreme conditions—often operating at temperatures exceeding 320°C (608°F) and hydrostatic pressures up to 35 MPa (350 bar). At this mechanical frontier, conventional woven mesh is prone to wire migration, localized channeling, and premature differential pressure (ΔP) spikes that destabilize extrusion pumps and compromise product uniformity.
Pujiang HG Plastic Machinery Co., Ltd. (operating from Jinhua, Zhejiang, China) represents the vanguard of Chinese specialized manufacturing. By consolidating metallurgy, diffusion vacuum sintering, precision automated pleating, and longitudinal TIG micro-welding under one roof, our facility delivers polymer candle filters and leaf discs engineered for prolonged on-stream longevity. Our filter media leverage sintered multi-layer metal fiber felts and graded mesh laminates that maximize effective filtration area (EFA), flatten the ΔP build-up curve, and capture rigid crosslinked gels, degraded carbon specks, and inorganic particulate with absolute micron precision.
| Filter Element Construction | Filtration Media Architecture | Effective Pore Rating (µm) | Collapse ΔP Limit | Primary Industrial Vector | Regeneration Capability |
|---|---|---|---|---|---|
| Cylindrical Sintered Mesh Candle | 5-Layer Diffusion Bonded SUS316L | 10 – 150 µm | 210 Bar | High-viscosity PE/PP compounding & recycling | Excellent (Pyrolysis / TEG / Ultrasonic) |
| Pleated Metal Fiber Candle Filter | Graded Micro-Fiber Felt + Support Mesh | 3 – 60 µm | 150 – 250 Bar | Spunbond nonwoven, POY/FDY spinning lines | High (Chemical rinse + Vacuum burnout) |
| Rigid Hard-Hub Leaf Disc Filter | Multi-Layer Sintered Wire Cloth + Hub | 5 – 80 µm | 250 Bar | BOPET, BOPP, Optical Polycarbonate film | Superior (Specialized continuous sonic baths) |
| Multi-Layer Extruder Screen Packs | Plain / Dutch Twill Stainless Weave Discs | 20 – 500 Mesh | 80 – 120 Bar | Breaker plate continuous pelletizing & blown film | Disposable / Mechanical Backflush |
Targeted fluid dynamics and metallurgical integrity configured to eliminate gel shearing, maintain continuous throughput, and secure flawless polymer rheology.
Eliminating melt stagnation zones and high-shear hot spots prior to spin-pack entrance. Sintered micro-metal fiber cartridges trap micro-gels that cause filament fly-out and spinneret hole plugging on medical and hygiene nonwoven lines.
Optical grade films require zero pinholes and fish-eyes. Our precision leaf disc filters offer radial hydraulic drainage cores that prevent polymer degradation across ultra-thin capacitor films, battery separators, and packaging barrier substrates.
Heavily contaminated post-consumer plastic streams demand rugged, high-dirt-capacity candle filters. HG engineers both the multi-tube melt filters and complete recycling lines (washing, shredding, extrusion pelletizers) to handle fluctuating MFI.
In continuous filament spinning for polyester and polyamide 6/66, our pleated candle filter assemblies maximize surface area within existing manifold envelopes, providing extended on-stream hours and uniform residence time across spin packs.
Installed downstream of continuous polycondensation reactors, our large-volume multi-candle vessel internals isolate trace catalysts, unreacted oligomers, and black specks before pellet cutting, safeguarding high prime product margins.
Seamless interchangeability with European, Japanese, and American melt pump housings and filter vessels. We supply direct drop-in dimensional replacements backed by laser-scanned tolerances and full material test certificates (MTR).
When international buyers qualify China-based melt filter element factories, verification must extend beyond nominal unit price. HG implements a rigorous 7-step quality control architecture to assure that each candle filter, leaf disc, and screen pack matches stringent metallurgical and fluidic criteria before departure from our Pujiang facility.
*Standard documentation with every consignment: Material Test Report (EN 10204 3.1), Bubble-Point Verification Certificate, Dimensional Inspection Sheet, and HS Code Customs Declarations.
Continuous evolution in metallics, computational fluid dynamics (CFD), and automated regeneration protocols defining next-generation polymer filtration efficiency.
Multi-stage progressive micro-fiber sintering that captures gel deformables in outer matrices while retaining rigid particles in sub-micron inner cores, increasing on-stream duration by 42%.
Additive 3D metal printed leaf disc flow distributors engineered to equalize volumetric flow across every square centimeter of cloth, completely eliminating dead polymer zones.
Turnkey closed-loop cleaning systems that combine non-oxidative thermal decomposition with pulsed ultrasonic cavitation, restoring element flow capacity through 15+ cycles without structural warping.
Hastelloy C-276, Monel, and titanium carbonitride (TiCN) anti-wear nano-coatings explicitly developed for highly corrosive fluoropolymers, recycled PET flakes, and halogen-free fire retardants.
Complementary OEM/ODM certified components designed for direct drop-in integration into standard filter vessels, extrusion breaker plates, and continuous filament melt packs.
In-depth responses compiled by senior metallurgical and filtration engineers to guide procurement, plant retrofits, and maintenance cycles.
HG manufactures melt filter elements from 5 µm up to 500 µm using sintered multi-layer wire mesh, sintered metal fiber felt and pleated mesh media. The rating is selected according to melt viscosity, throughput (kg/h) and the gel or contaminant profile of your polymer. Over-filtering artificially elevates shear heat and pressure drop, while under-filtering permits defect carry-over. We commonly configure graded-density media packs to achieve optimal dirt retention and isobaric stability.
Yes. Provide the housing drawing, the original element part number, outer/inner diameter, length, gasket type and operating pressure, and our engineering team reverse-engineers a drop-in replacement that seals and fits the existing manifold without machine modification. We verify end fitting dimensions (e.g., M24, M30 threads, 222/226 bayonets, or flat crush seats) to guarantee 100% leak-proof interchangeability with European and American OEMs.
Every batch ships with a dimensional inspection report, bubble-point or flow test data where applicable, stainless steel material grade traceability (304 / 316L / 310S), packing list and commercial invoice for customs clearance. Distributors can also request private-label marking, laser engraving of customized serial/part numbers, and installation instructions for downstream operators.
Sintered mesh and metal fiber elements are regenerable. After thermal cleaning, pyrolysis and ultrasonic or chemical rinsing, elements typically deliver multiple service cycles, which is why customers in BOPET and spunbond lines report a clear reduction in filtration cost per ton. We provide element cleaning SOP guidelines detailing temperature ramp rates to prevent alloy embrittlement or micro-pore deformation during burnout.
Wire migration is prevented through high-temperature vacuum diffusion bonding (sintering). Under precise thermodynamic conditions, crossing wires bond metallurgically at contact points without altering mesh apertures. Combined with perforated inner support cores and specialized TIG seam welding, elements retain total structural rigidity up to 250-300 bar collapse ratings.
Woven wire mesh provides precise, uniform geometric 2D pore openings, making it ideal for surface filtration and rigid particulate removal. Sintered metal fiber felt consists of randomly oriented micro-filaments forming a 3D depth matrix with up to 85% porosity. Fiber felt delivers up to four times the dirt-holding capacity and effectively traps compressible, gelatinous polymer gels that extrude through standard wire cloth.
Unlike pure mesh traders, HG engineers turnkey plastic recycling plants—including wet shredders, dynamic friction washers, and single/twin-screw granulators. By engineering the extrusion filtration system directly within the recycling machinery loop, we configure screen areas and backflush regimes matched to specific scrap feedstock (PP woven bags, PE film, PET flakes), minimizing operator intervention.
Standard wire mesh packs and extruder screens are stocked for dispatch within 7 days. Customized pleated candle filters, sintered leaf discs, and bespoke vessel internals normally require 20 to 30 working days from technical drawing sign-off. Free engineering samples for dimension and fit trials are available for qualified production lines prior to volume commitment.
Providing seamless cross-border technical compliance, customs clearance documentation, and direct engineering access to overseas manufacturing operations.
Pujiang HG Plastic Machinery Co., Ltd.
No. 18 Xiayang Road, Pujiang County, Jinhua City,
Zhejiang Province, 322200, China
Business Hours: Mon – Sat, 08:30 – 18:00 (GMT+8)
Technical Sales: +86 18158303579
Primary Desk: [email protected]
Direct Inquiries: [email protected]
ISO 9001:2015 Registered Production
Pressure Equipment Directive (PED 2014/68/EU)
Raw Material Traceability: EN 10204 3.1 MTR
Pore Size Verification: ASTM E-128 / ISO 4003
