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.
- Supports strand pelletizing and water-ring pelletizing for different polymers and capacities.
- Designed for stable melt filtration, uniform pellet size, and lower fines.
- Custom engineering available for recycled plastics, compounds, and modified materials.
Comparing Pelletizing Systems
The ideal technology depends on your material type, output requirements, and operational preferences. We specialize in two primary, highly efficient systems.
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.
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.
Overcoming Production Challenges
How our pelletizing systems resolve common production challenges and improve quality, uptime, and cost.
Closed-loop control of die-face or strand speed, automatic knife pressure, and post-classification deliver uniform 3-5 mm pellets and lower dust and rework.
Continuous dual-channel or backflush screen changers with enlarged filtration area extend run time, stabilize melt pressure, and cut scrap events.
Pre-drying plus vacuum-vented extruders remove moisture and VOCs; optimized die heating produces a stable melt and glossy pellets.
IE3 and IE4 motors with VFDs, energy-tuned screws, and closed-loop water circuits reduce specific energy consumption and utility cost.
Live System Demonstration
Watch a complete walkthrough of one of our advanced plastic pelletizing lines, from raw material to final, high-quality pellets.
Features for Consistent Quality
Every component is selected to ensure the purity, consistency, and value of your final product.
Continuous Melt Filtration
Automatic screen changers remove contaminants without interrupting production, ensuring a pure melt stream.
Efficient Dewatering
A vertical centrifugal dryer rapidly removes surface water from the pellets, preparing them for classification and storage.
Pellet Classification
A vibrating screen classifies pellets by size, removing oversized or undersized particles for a highly uniform final product.
Strand Type Cutting System
Water-cooled strands are cleanly cut into uniform pellets with low fines and consistent length.
Premium Output Applications
Our systems produce clean, uniform, and highly marketable pellets from a wide range of input materials.
Technical Specifications
Representative configurations. Custom engineering and options are available on request.
| Machine Model | Auxiliary Equipment | Single Screw Extruder | Capacity (kg/h) | |||
|---|---|---|---|---|---|---|
| Pelletizing Method | Filtering Method | Screw Diameter (mm) | L/D Ratio | Motor Power (kW) | ||
| SJ85-100 | Water strands pelletizing | Plate screen changer | 85 / 100 | 28-33:1 / 10:1 | 55-75 | 100-200 |
| SJ100-120 | Water strands pelletizing | Plate screen changer | 100 / 120 | 28-33:1 / 10:1 | 90-110 | 200-350 |
| SJ130-150 | Water strands pelletizing | Column screen changer | 130 / 150 | 28-33:1 / 10-12:1 | 132-160 | 400-550 |
| SJ150-160 | Water strands pelletizing | Column screen changer | 150 / 160 | 28-33:1 / 12:1 | 185-200 | 500-650 |
| SJ160-180 | Water ring pelletizing | Automatic screen changer | 160 / 180 | 28-33:1 / 12:1 | 220-250 | 700-900 |
| SJ180-200 | Water ring pelletizing | Automatic screen changer | 180 / 200 | 28-33:1 / 12:1 | 280-315 | 900-1200 |
Values are indicative; final specs depend on material and configuration.
Customer Success Outcomes
Real outcomes reported by customers operating our pelletizing systems.
Plant Engineer, Recycling Producer
Pellet quality tightened and dust dropped by about 40%, while throughput rose around 25% after moving to continuous filtration and tuning cutter speed.
Operations Manager, Film Converter
Water-ring pelletizing stabilized PP film regrind across shifts. Specific energy fell by roughly 15% and shift-to-shift variability was reduced.
Production Director, Compounder
Turnkey delivery and on-site training were on schedule. Uptime improved with the recommended screen packs and maintenance plan.
Equipment Overview
Key modules in a standard pelletizing line, from filtration to final drying and classification.
Filtration and Melt Stabilization
Automatic screen changers remove residual contamination from the melt stream and stabilize pressure before pellet cutting.
- Supports longer continuous runs with fewer stoppages.
- Improves pellet cleanliness and reduces black specks.
Drying and Pellet Classification
Vertical centrifugal dewatering and vibrating classification screens prepare pellets for storage, bagging, or downstream use.
- Removes residual water quickly after pellet cutting.
- Separates oversize and fines for a more uniform final product.
Frequently Asked Questions
What is the difference between strand and water-ring pelletizing?
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.
What materials can be pelletized using these systems?
PET, HDPE, LDPE, PP, PS, EVA, ABS, and filled or reinforced compounds. The systems can process both recycled and virgin materials.
Do you offer complete turnkey solutions?
Yes. We provide full pelletizing systems with extruders, filtration, pellet cutting, cooling, and drying, as well as installation and training.
What capacity ranges are available?
Typical line capacities range from 100 to 2000 kg/h depending on configuration and polymer type.
Get Your Custom Quote
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.