Background

Recycled PET bottle flakes are produced from waste beverage bottles through sorting, crushing, washing, and drying processes. This makes it possible to produce recycled PET flakes wherever there is beverage consumption. China has historically been a major market for imported PET flakes, with over 10-13 million tons of PET flakes entering the country annually.

However, in 2017, environmental regulations in China became stricter, banning the import of all waste plastics, including recycled PET bottles in any form such as bales or flakes. As a result, recycled plastics can only be imported as granules or chips. This change necessitates re-pelletizing the recycled PET flakes for recyclers who process them.

To meet these new requirements, the re-pelletizing of recycled PET flakes has become essential. The process involves several critical concerns:

• Avoid hydrolysis during the re-pelletizing process;
• Use a large displacement ventilating system to minimize IV value reduction;
• Minimize yellowing during re-pelletizing;
• Implement an automatic pelletizing method to reduce labor and ensure stable high output.

Recycled PET Bottle Flakes Re-Pelletizing Flowchart from ACERETECH

Features of PET Bottle Flakes Recycling and Pelletizing System from ACERETECH

• Pre-drying is crucial before re-pelletizing. ACERETECH uses either a venting type compactor or a lifting type drying hopper to remove moisture from the flakes, preventing PET hydrolysis during processing;

• The system integrates modular design and advanced degassing features from twin screw extruders, along with an automatic 3-level Roots-type vacuum pump set. This ensures a vacuum pressure of -0.1MPa, effectively removing volatiles from PET melts to maintain minimal IV value reduction;

• Optimized process steps and specialized screw designs help transform PET flakes efficiently from solid to liquid state, avoiding yellowing caused by dead zones or localized overheating;
• Strands pelletizing is a common method where extruded strands are manually cooled in a water trough, then dried and cut into pellets. This method requires more labor and is suitable for capacities below 600kg/h;

• For high-capacity applications, an automatic underwater pelletizing system is necessary to ensure consistent output and automation;

Recycling Machine Factories (ACERETECH)

Advantages of Our System
a. Water-cooling temperature control for precise process management.

b. Integrated strands pelletizing system for efficient production.

c. Full support for inspection, installation, and testing.

d. Long-term service with cost-effective spare parts and ongoing technical support.

Service and Support
1. Overseas installation and training available;
2. Warranty with spare parts in stock and timely delivery.

Single Mechanical Seals

• Durability: Made from high-quality materials to withstand harsh conditions.
• Precision Engineering: Ensures a perfect fit and optimal performance.
• Leak Prevention: Effectively prevents fluid leakage, enhancing system efficiency.
• Versatility: Suitable for different fluids and temperatures.
• Easy Installation: Simplifies maintenance and replacement processes.

These attributes make them essential for reliable operation in pumps, compressors, and other machinery.

Single Mechanical Seal,Mechanical Seals,Precision Mechanical Seals,Sealing Rings

Zigong MT Cemented Carbide Tech Co., Ltd. , https://www.mtcarbide.com