Product Overview
The PET Recycling Twin Screw Granulator is an industrial recycling system designed for continuous production of high-quality recycled PET (rPET) pellets from PET bottle flakes and polyester-based waste materials.
It is engineered for stable industrial operation with requirements for consistent intrinsic viscosity (IV), controlled melt quality, and efficient removal of moisture and volatile compounds.
Compared with conventional single screw systems, the twin screw configuration provides improved mixing stability, stronger degassing efficiency, and better process control under variable raw material conditions.
The system is suitable for PET recycling plants and industrial plastic recycling operations requiring stable long-term production performance.
Engineering Performance Data
- Continuous industrial operation capability (24/7 design)
- Output stability: ±2–3% under steady feeding conditions
- Final moisture content: ≤50–100 ppm
- Controlled IV loss through optimized thermal and shear management
- Energy consumption reduction: 15–25% compared with single screw systems
- Stable melt homogeneity during continuous production cycles
Process
PET bottle flakes → Forced feeding system → Twin screw melting and homogenization → Multi-stage vacuum degassing → Continuous melt filtration → Pelletizing system (strand or underwater optional) → Cooling and drying system → Final PET pellets
Raw Material Compatibility
Post-consumer PET bottle flakes
Hot-washed PET flakes
Industrial PET scrap materials
Polyester fiber waste
Mixed PET regrind materials
Final Pellet Quality
- Stable intrinsic viscosity (IV) retention
- Uniform pellet size (3–5 mm standard)
- Low moisture content suitable for downstream processing
- Low contamination level after filtration
- Suitable for fiber-grade and bottle-grade applications
- Stable melt flow consistency for industrial use
Engineering Advantages
Controlled Polymer Stability
Precise thermal and mechanical control reduces degradation and helps maintain consistent IV levels during processing.
Multi-Stage Vacuum Degassing System
Efficient removal of moisture, volatile compounds, ink residues, and adhesive impurities.
High Mixing Efficiency
Co-rotating twin screw design ensures uniform dispersion and stable melting performance under continuous operation.
Wide Raw Material Adaptability
Stable processing performance for different PET flake qualities, including post-consumer and mixed waste streams.
Continuous Production Stability
Designed for long-duration industrial operation with consistent output quality and process reliability.
Technical Specifications
|
Parameter |
Specification |
|
Screw Diameter |
62–95 mm |
|
L/D Ratio |
36:1 – 64:1 |
|
Output Capacity |
150–1000 kg/h |
|
Screw Type |
Co-rotating twin screw |
|
Degassing System |
Multi-stage vacuum unit |
|
Pelletizing Type |
Strand / Underwater |
|
Control |
ABB PLC |
|
Material |
Wear-resistant alloy steel |
Quality Control & Factory Testing
Each system undergoes factory testing prior to shipment, including:
- Continuous operation testing (8–24 hours simulation)
- Electrical safety inspection
- Mechanical precision inspection of screw and barrel components
- Vacuum system performance verification
- Operational stability validation under working conditions
FAQ
Hot Tags: pet recycling twin screw granulator, China pet recycling twin screw granulator manufacturers, suppliers, factory, air cooled granulator, Automatic Waste Plastic Pelletizing Machine, pe film granulator, PP Woven Bag and FIBC Bag Granulating Machine, pvc sheet granulator, Single Screw Dry and Wet Plastic Granulator
