350-450kg/H Twin Screw Extruder and Pelletizing System for Pet

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 in any area where beverages are consumed. China is one of the main markets for imported recycled PET flakes, with over 10–13 million tons of PET flakes being imported annually.

However, in 2017, environmental regulations in China became stricter, and the import of waste plastics, including recycled PET, was completely banned. As a result, recycled plastics can only be imported in the form of granules or chips. This has made it necessary for PET bottle flake recyclers to re-pelletize their materials to meet these new standards.

Processing Concerns

• Avoid hydrolysis during the re-pelletizing process of PET flakes;
• Use a large displacement ventilating device to minimize IV value reduction;
• Prevent or reduce yellowing during the re-pelletizing process;
• 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

• Adequate pre-drying time is essential before re-pelletizing. ACERETECH uses either venting-type compactors or lifting-type drying hoppers to remove moisture from the flakes, preventing PET hydrolysis during processing;

• The system combines modular processing sections with efficient degassing structures from twin-screw extruders and an automatic three-stage Roots vacuum pump set. This ensures that the vacuum pressure reaches -0.1MPa, effectively removing volatiles from the PET melt and minimizing IV value reduction;

• Optimized process steps and specialized design of the twin-screw extruder enable continuous and efficient transformation of PET flakes from solid to liquid state, avoiding yellowing caused by dead zones or local overheating;
• The strands pelletizing unit is commonly used for PET pelletizing. The strands exiting the extruder die are manually guided into a water trough for cooling, then dried using an air knife, cut by the pelletizer blades, and formed into granules/chips. This method requires more labor and skilled operation, suitable for capacities below 600kg/h;

• For high-capacity PET pelletizing, the strands method is not ideal. An automatic underwater pelletizing system is necessary to ensure high output and automation performance.

Recycling Machine Factories (ACERETECH)

Advantages of Our System
a. Water-cooling temperature control for the process section, ensuring precise temperature regulation.

b. Strands pelletizing system integrated into the recycling system.

c. Arrangement for inspection, installation, and testing work.

d. Long-term service: We offer cost price for spare parts beyond one year and provide long-term technical support.
 

Service and Support
1. Overseas installation and training are available;

2. Machine warranty with spare parts in stock and timely delivery.

Valve Cores & Valve Seats

Valve Cores & Valve Seats

Our valve cores and valve seats are engineered specifically for the rigorous demands of oil and gas drilling applications. Constructed from high-performance materials, these Components provide exceptional wear resistance and longevity, ensuring optimal functionality in high-pressure environments.

Designed for precision, our valve cores facilitate efficient fluid flow and pressure management, while our valve seats ensure secure sealing and minimize leakage. These products are critical in maintaining the integrity of drilling operations, supporting safe and efficient extraction processes.

With advanced manufacturing techniques and strict quality control standards, we guarantee that our valve cores and seats meet the highest industry specifications. Trust our solutions to enhance the performance and reliability of your drilling equipment, ultimately reducing maintenance costs and improving operational efficiency in oil and gas drilling.

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