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Years manufacturing polymer melt filters

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OEM & ODM filtration projects delivered

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Years of custom filter element engineering

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Free samples & test reports before order

HG Plastic Machinery filter manufacturing workshop in Pujiang, Zhejiang, China
ISOManaged Production
About HG

Polymer Filtration Systems & Filter Elements Built for Continuous Production

Pujiang HG Plastic Machinery Co., Ltd. — Jinhua, Zhejiang, China

Since our first melt filter order in 2005, HG has focused on a single discipline: keeping polymer melt clean under heat and pressure. Our engineers work daily with extrusion, film, spunbond and fiber plants, so every candle filter cartridge, leaf disc and screen mesh pack we ship is designed around real process data — melt index, throughput, filtration rating and differential pressure limits — not catalogue guesswork.

  • Full filtration portfolio in one supplierStainless steel mesh filters, leaf disc filters, candle filter cartridges, pleated filters, sintered metal elements and matching housings.
  • OEM & ODM manufacturing you can auditIn-house mesh weaving selection, laser cutting, sintering, TIG welding, pleating and dimensional inspection — with traceable 304 / 316L / 310S material grades.
  • One-stop process solutionsFrom melt filtration layout to element regeneration planning, we help buyers reduce screen change frequency and scrap rate per ton of output.
  • Complete plastic recycling linesWashing, crushing, mixing and granulating equipment that turns PP film, woven bags and bottle flakes into re-usable pellets.
Explore Product Lines
Core Product Categories

Every Filter Type Your Melt Line Needs

Select media, geometry and filtration rating per application. All elements are engineered to drop into your existing housings, with documented flow area, burst pressure and dirt-holding capacity.

Leaf Disc Filter Leaf disc filter stack for polymer melt filtration
01 / Category

Leaf Disc Filters for Extrusion & Film Lines

Leaf disc filters deliver the largest effective filter area per housing volume, which is why they dominate BOPET, BOPP and compounding lines. HG discs use sintered multi-layer mesh or metal fiber felt bonded to a rigid drainage core, keeping the pressure drop curve flat over long on-stream cycles and protecting die lips from gel carry-over.

  • 5–200 µm ratings
  • OD 100–600 mm
  • 304 / 316L / 310S
  • Regenerable media
Sintered mesh leaf disc filterDisc Filter Sintered disc filter elementSintered Disc Polymer disk filter assemblyPolymer Disk
View Leaf Disc Filters
Candle Filter Cartridge Polymer candle filter cartridges for melt filtration housings
02 / Category

Polymer Candle Filter Cartridges

Candle filters remove gels, char and unmelted particles from PET, PA, PP and PE melt streams. HG supplies both cylindrical and pleated constructions; pleated media multiplies surface area inside the same housing envelope, extending run hours between changeovers on spunbond and staple fiber lines. Each candle is pressure-tested and supplied with end-fitting geometry matched to your manifold.

  • Pleated & cylindrical
  • Length up to 1,500 mm
  • Sintered fiber felt
  • Housing-specific ends
Polymer candle filter elementCandle Filter Pleated candle filter cartridgePleated Candle Sintered candle filter cartridgeSintered Candle
View Candle Filters
Screen Mesh Filter Stainless steel screen mesh filter elements and extruder screen packs
03 / Category

Screen Mesh Filters & Extruder Screen Packs

Woven stainless mesh remains the most cost-efficient barrier for recycling and compounding extruders. HG mesh resists high temperature and chemical attack, holds tensile strength at the breaker plate, and can be fabricated as round discs, belts, cylinders, pleated packs or custom profiles. Mesh counts from 20 to 500 are stocked, with laser-cut edges that stop wire shedding into the melt.

  • 20–500 mesh
  • Single & multi-layer packs
  • Laser / stamped cut
  • Belt, disc, cylinder shapes
Extruder screen mesh discsExtruder Screen Mesh filter elementMesh Filter Stainless steel filter mesh rollStainless Mesh
View Screen Mesh Filters
Filtration Systems Complete polymer filtration system with housing and melt filter elements
04 / Category

Polymer Filtration System Solutions

Beyond elements, HG engineers the housing around them: diameter, height, wall thickness, metal grade, heating method and design pressure are configured to your melt temperature and shear profile. Buyers replacing legacy systems receive a comparison of flow area, expected differential pressure and element cost per operating hour before tooling begins — so the investment case is clear to both engineering and procurement.

  • Custom housing design
  • Flange & seal matching
  • Pressure-rated welding
  • Element regeneration plan
Melt filtration housing with candle filtersFilter Housing Pleated candle filter assembly for filtration systemPleated Assembly Sintered candle filter set for polymer filtration systemSintered Set
Discuss a System
Plastic Recycling PP plastic recycling line with crushing and granulating machinery
05 / Category

Plastic Recycling Machines & Turnkey Lines

For recyclers, filtration is only one stage. HG supplies the complete PP route — washing, shredding, crushing, mixing, granulating and pelletizing — sized for feedstocks such as PP film, woven bags, blown film and bottle flakes. Because we also build the melt filters inside those lines, output pellet cleanliness is engineered end-to-end rather than patched with oversized screens.

  • PP film / woven / flakes
  • Washing & crushing
  • Granulating & pelletizing
  • Scalable capacity
Waste plastic washing machineWashing Machine Waste plastic crusherPlastic Crusher Plastic mixing tankMixing Tank
View Recycling Machines
OEM & ODM Service

Four Layers of Customisation, One Engineering Team

Send a drawing, a used element or simply your process parameters. Our technical team returns a manufacturing proposal with media structure, tolerance plan and sample timeline — typically within two working days.

Filtration accuracy customisation for melt filter elements
01

Filtration Accuracy

Ratings from 5 µm to 500 µm, verified by bubble-point and flow testing so the pressure curve matches your die and pump limits.

Filter media material customisation options
02

Filter Media

Woven mesh, sintered multi-layer mesh, metal fiber felt or perforated support — chosen for temperature, corrosion and dirt-holding needs.

Filter size and geometry customisation
03

Size & Geometry

Reverse engineering from samples or drawings: OD/ID, length, pleat depth, end caps and gasket seats machined to drop-in tolerance.

Brand and private label customisation service
04

Brand & Packaging

Private-label marking, laser part numbers, export cartons and multilingual documentation for distributors and MRO resellers.

Application Areas

Proven Where Melt Purity Decides Product Quality

Four industries account for most of our production volume. Each has different contamination sources — and therefore a different optimum media structure.

Extrusion line using stainless steel screen mesh filters
Application Area

Plastic Extrusion Industry

In extruders, the screen pack protects the die from carbon, metal fines and unmelted polymer while helping build back pressure for homogeneous mixing. Typical ratings run from 20 to 150 mesh or finer, layered so the coarse mesh carries load and the fine mesh sets the cut point.

HG supplies mesh discs, screen packs, breaker-plate sets and stainless wire mesh rolls, all cut with sealed edges. For recycling extruders we advise on pack sequence and change intervals to keep throughput stable instead of chasing pressure spikes.

Screen mesh filter discs used in plastic extrusion Extruder screen pack installation detail
Polymer film production line using leaf disc and candle filters
Application Area

Polymer Film Industry

OPP, CPP, BOPA, BOPET and BOPP lines cannot tolerate gels: a single defect ruins an entire web. Leaf disc filters and candle filters remove particles and gel bodies during melt forming, upstream of the die.

Our discs and cartridges are built with modified sintering and welding technology for high temperature and pressure resistance, chemical corrosion resistance and strong contaminant-holding capacity. They are cleanable and reusable, which measurably lowers filtration cost per ton and reduces unplanned line stops.

Leaf disc filters for BOPET film line Candle filter cartridges for polymer film filtration
Chemical fiber spinning line melt filter elements
Application Area

Chemical Fiber Industry

Spinning demands continuous, uninterrupted melt filtration. Melt filters remove impurities and unmelted particles ahead of the spin pack, directly protecting spinneret life, filament evenness and yarn tenacity.

Elements are built mainly from stainless steel sintered felt and corrugated mesh for high porosity and high contaminant capacity. Media grade, dimensions and filtration rating are customised per spinning position — critical for spunbond, POY, FDY and staple fiber operations.

Sintered felt melt filter element for fiber spinning Melt filter cartridges for chemical fiber production
Petrochemical plant filtration elements
Application Area

Petrochemical Industry

Petrochemical duty means strict fluid purity plus protection of downstream pumps and pipelines. Sintered metal elements remove solids from process streams and prevent line blockage under fluctuating pressure.

Refining: impurity removal from crude streams to keep product purity within specification. Chemical production: filtration of reaction liquids to eliminate solid particles. Storage and transfer: oil filtration that keeps contaminants out of the system and equipment safe from abrasive damage.

Sintered metal filter element for petrochemical service Filtration elements used in oil and chemical processing
Why Buyers Re-order

Engineering Evidence, Not Sales Promises

What overseas procurement teams and plant engineers tell us matters most when qualifying a filtration supplier.

Traceable Materials

Every batch records the stainless grade (304, 316L, 310S), mesh specification and sintering parameters, so audits and re-orders reproduce identical performance.

Factory-direct Capability

Cutting, sintering, welding, pleating and inspection happen under one roof in Pujiang, Zhejiang — shorter lead times and no hidden trading margin.

Longer On-stream Life

Graded media stacks and correct free-flow area flatten the differential pressure curve, which means fewer changeovers and less production loss per month.

Export-ready Logistics

Rust-preventive packing, palletised cartons, HS code guidance and full document sets keep customs clearance predictable in the EU, US, India and Latin America.

Technical Support in English

Engineers — not script readers — answer questions on media selection, pressure limits, cleaning cycles and installation sequence.

Free Samples First

Trial elements and test data before a production order let your team validate fit and filtration result at zero sample cost.

Technical FAQ

Questions Procurement Teams Ask Us First

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 correct rating is selected from melt viscosity, throughput in kg/h and the gel or contaminant profile of your polymer — over-filtering raises pressure drop, under-filtering passes defects, so we usually recommend a two-stage graded stack.

Yes. Send the housing drawing, the original element part number, outer/inner diameter, length, gasket type and operating pressure. Our engineering team reverse-engineers a drop-in replacement that seals correctly in the existing manifold, so no machine modification or downtime for retrofitting is required.

Every batch ships with a dimensional inspection report, bubble-point or flow test data where applicable, stainless steel material grade traceability, packing list and commercial invoice. Distributors can also request private-label marking and multilingual installation notes.

Sintered mesh and metal fiber elements are regenerable. After thermal cleaning, pyrolysis and ultrasonic or chemical rinsing, elements typically deliver several service cycles. Customers running BOPET and spunbond lines report a clear reduction in filtration cost per ton once a structured regeneration routine is in place — we supply the recommended cleaning sequence with the first order.

Standard mesh discs and screen packs usually ship within 7–15 days. Custom candle filters, leaf discs and housings depend on tooling and testing, commonly 20–35 days after drawing approval. Trial quantities are accepted for qualification, and repeat volume pricing is confirmed after the first production batch.

Knowledge Hub

Filtration Insights From Our Engineers

Field notes on melt filtration selection, purchasing criteria and application performance — written by the people who build the elements.

Melt filter cartridges installed on a spunbond nonwoven production line

Filtration Advantages of Melt Filter Cartridges in Spunbond Nonwoven Lines

Why candle cartridges outperform flat screens on PP spunbond lines: available surface area, gel retention and the effect on spinneret cleaning intervals.

Read insight
Polymer candle filter cartridges prepared for shipment

A Comprehensive Guide to Purchasing Polymer Candle Filter Cartridges

The specification checklist we send buyers: media type, micron rating, end fittings, pressure rating, cleaning plan and total cost per operating hour.

Read insight
Polymer candle filter elements used across industrial applications

Polymer Candle Filter Elements Across Industrial Applications

Structural and performance advantages of candle elements in film, fiber, compounding and petrochemical service — plus where they are the wrong choice.

Read insight

Send Your Filtration Drawing or Sample

Tell us the polymer, throughput and housing you run. You will receive a media recommendation, dimensional proposal and sample plan from our engineering team — no obligation, no sample charge.

Request a Catalog Contact Our Engineers