Plastic Pelletizing Lines

High-Performance Plastic Pelletizing Lines for Uniform, High-Value Pellets

Our advanced plastic pelletizing lines are the final step in transforming recycled plastic waste into a valuable, consistent, and reusable raw material. We engineer complete systems for compounding, modifying, and pelletizing a wide range of polymers.

Design Your Pelletizing Line

Choosing The Right Pelletizing System

The ideal technology depends on your material type, output requirements, and operational preferences. We specialize in two primary, highly efficient systems.

A Water-Strand Pelletizing unit.

Water Strand Pelletizing Line

A classic, robust, and cost-effective method ideal for a wide variety of polymers, especially those sensitive to temperature changes.

  • Process: Molten plastic is extruded into strands, cooled in a water bath, and then cut into pellets by a granulator.
  • Best for: PET, Polystyrene (PS), and highly-filled or reinforced compounds.
  • Advantage: Simple operation, easy to clean, and versatile for lab or large-scale production.
A horizontal water-ring pelletizer unit.

Water-Ring Pelletizing Line

A more automated and compact system that cuts pellets at the die face, ideal for high-volume production of polyolefins.

  • Process: Blades rotate at the die face, cutting pellets which are instantly quenched and transported by a circulating water ring.
  • Best for: PE, PP, and other materials with lower melt viscosity.
  • Advantage: Produces uniform, spherical pellets, requires less floor space, and is highly automated.

From Pain Points to Performance

How our pelletizing systems resolve common production challenges and improve quality, uptime, and cost.

Problem → Solution

Inconsistent pellet size and high fines

Closed‑loop control of die‑face/strand speed, automatic knife pressure, and post‑classification deliver uniform 3–5 mm pellets and lower dust/rework.

Problem → Solution

Frequent filter clogging and downtime

Continuous dual‑channel/backflush screen changers with enlarged filtration area extend run time, stabilize melt pressure, and cut scrap events.

Problem → Solution

Moisture/volatiles causing bubbles and poor surface

Pre‑drying plus vacuum‑vented extruders remove moisture and VOCs; optimized die heating produces a stable melt and glossy pellets.

Problem → Solution

High kWh/kg and water usage

IE3/IE4 motors with VFDs, energy‑tuned screws, and closed‑loop water circuits reduce specific energy consumption and utility costs.

See Our System in Action

Watch a complete walkthrough of one of our advanced plastic pelletizing lines, from raw material to final, high-quality pellets.

Engineered for Ultimate Pellet Quality

Every component is selected to ensure the purity, consistency, and value of your final product.

  • Automatic screen changer for continuous melt filtration.

    Continuous Melt Filtration

    Automatic screen changers remove contaminants without interrupting production, ensuring a pure melt stream.

  • Vertical centrifugal dewatering machine.

    Efficient Dewatering

    A vertical centrifugal dryer rapidly removes surface water from the pellets, preparing them for classification and storage.

  • Vibrating screen for pellet classification.

    Pellet Classification

    A vibrating screen classifies pellets by size, removing oversized or undersized particles for a highly uniform final product.

  • Co-rotating twin-screw extruder for compounding.

    Strand type cutting system

    Water-cooled strands are cleanly cut into uniform pellets with low fines and consistent length.

Achieve Premium Pellet Quality

Our systems produce clean, uniform, and highly marketable pellets from a wide range of input materials.

Clean, white PE plastic pellets.

PE Pellets

Uniform pellets made from recycled plastic bags.

Plastic Film Pellets

Grey PVC recycled plastic pellets.

PVC & Hard Plastic Pellets

Technical Specifications

Representative configurations. Custom engineering and options are available on request.

Machine ModelAuxiliary EquipmentSingle Screw ExtruderCapacity (kg/h)
Pelletizing MethodFiltering MethodScrew Diameter (mm)L/D RatioMotor Power (kW)
SJ85–100Water strands pelletizingPlate screen changer85 / 10028–33:1 / 10:155–75100–200
SJ100–120Water strands pelletizingPlate screen changer100 / 12028–33:1 / 10:190–110200–350
SJ130–150Water strands pelletizingColumn screen changer130 / 15028–33:1 / 10–12:1132–160400–550
SJ150–160Water strands pelletizingColumn screen changer150 / 16028–33:1 / 12:1185–200500–650
SJ160–180Water ring pelletizingAutomatic screen changer160 / 18028–33:1 / 12:1220–250700–900
SJ180–200Water ring pelletizingAutomatic screen changer180 / 20028–33:1 / 12:1280–315900–1200
Values are indicative; final specs depend on material and configuration.

Trusted by Production Teams

Real outcomes reported by customers operating our pelletizing systems.

Pellet quality tightened and dust dropped by about 40%, while throughput rose ~25% after moving to continuous filtration and tuning cutter speed.

Plant Engineer, Recycling Producer

Water‑ring pelletizing stabilized PP film regrind across shifts. Specific energy fell by roughly 15% and shift‑to‑shift variability was reduced.

Operations Manager, Film Converter

Turnkey delivery and on‑site training were on schedule. Uptime improved with the recommended screen packs and maintenance plan.

Production Director, Compounder

Ready to Produce Premium Plastic Pellets?

Contact our experts to discuss your specific material and application. We will design a custom pelletizing or compounding line to meet your goals for quality and throughput.

Get a Custom System Quote

Frequently Asked Questions

Strand pelletizing extrudes molten plastic into strands cooled in water before cutting, while water-ring pelletizing cuts at the die face, producing uniform spherical pellets. The best choice depends on polymer type and production scale.

PET, HDPE, LDPE, PP, PS, EVA, ABS, and filled or reinforced compounds. The systems can process both recycled and virgin materials.

Yes. We provide full pelletizing systems with extruders, filtration, pellet cutting, cooling, and drying, as well as installation and training.

Typical line capacities range from 100 to 2000 kg/h depending on configuration and polymer type.

Single-screw extruders are ideal for re-pelletizing clean polyolefins (PE/PP) with stable melt flow. Twin-screw extruders are preferred for compounding, devolatilization, color masterbatch and formulations with fillers or additives that require intensive mixing and precise dosing.

Options include manual, hydraulic, and continuous screen changers (dual-channel or backflush). Mesh sizes are selected based on contamination level and target pellet quality; we help size filtration to balance purity, pressure stability, and throughput.

Pellet dimensions are governed by die orifice, cutter speed, and strand tension (strand cut) or blade/face speed and die temperature (water-ring). Typical pellets are 3–5 mm. Proper cooling, cutter settings, and post-classification minimize dust and off-size pellets.

Utilities typically include a 3-phase power supply sized to the extruder and auxiliaries, a closed-loop cooling water circuit (or chiller/tower), and compressed air for valves and knife pneumatics. We provide a utilities list with estimated flow rates and connections during proposal.

Transforming plastic film waste into a valuable resource is a key challenge in the recycling industry. Our PP/PE Film Pelletizing Machine is a complete, end-to-end solution designed for this purpose. From initial shredding and washing to final extrusion and cooling, our system is engineered to handle materials like HDPE, LDPE, and PP, producing clean, uniform pellets that meet international quality standards. It's the ideal choice for businesses looking to reduce waste, cut costs on virgin materials, and turn recycling into a profitable venture.
Explore the Rumtoo RLE-20Plus Lab Extruder, engineered for precision and versatility in material research and pilot-scale production. Featuring a modular twin-screw design, advanced Siemens PLC controls, and robust components, it's the ideal solution for developing new polymers and compounds.
Recycling lightweight, fluffy materials like plastic film and fibers presents a unique challenge for standard granulators. Our Cutter Compactor Recycling Granulating Line is the all-in-one solution designed specifically for this task. The integrated cutter compactor unit shreds, dries, and densifies the material before it even enters the extruder, ensuring a stable, high-volume feed and preventing common issues like bridging. This streamlined process transforms a wide range of plastic scraps, from PE films to PP woven bags, into uniform, high-quality pellets, making it a highly efficient and cost-effective investment for your recycling operation.