BOPET (biaxially oriented polyester film) is a high-performance material widely evaluated in fields such as packaging, electronics, electrical, and optical materials. Its excellent mechanical properties, chemical corrosion resistance, transparency, and printability make it a preferred choice in many industrial sectors. However, due to its extensive use, the amount of waste BOPET film generated has been increasing year by year. If not effectively recycled, these films will become an environmental burden. To achieve sustainable resource circulation, the recycling and granulation of BOPET films have become key concerns in the industry.
Manufacturers may produce scraps or defective products during the production of BOPET film, and they will need a recycling granulation equipment to process the waste film generated during their production process. As a specialist in plastic recycling machinery, ACERETECH provides turnkey solutions for waste BOPET film recycling based on extensive experience.
Step 1-SIZE REDUCSION：
When recycling BOPET film, we usually need to reduce the size of the BOPET film to within 20mm. This way, after the material enters the compactor and shrinks at high temperatures, the size becomes more uniform, creating a stable and efficient foundation for subsequent entry into the extruder. Therefore, we need to equip a highly efficient and powerful crusher. To ensure the continuous and stable crushing and granulation process, we need to add a buffer silo between the crusher and granulator.
Step 2：Compacting & Melting & Vacuum degassing &Melt filtration
Compactor: The crushed BOPET fragments enter the pellet bin and rotate at high speed, generating frictional heat that causes the material to reach a pre shrunk state. The unique dual disc design effectively ensures the material stays in the compaction bin for a longer period of time, resulting in more efficient removal of moisture.
Melting and Degassing: Unique screw design, high-quality bimetallic material, not only gently and efficiently melts BOPET material and transports it forward, but also ensures that output capacity will not decrease for at least two years. With Water-ring pump combines with Roots pumps, volatile such as micro-molecules and moisture in the melt are exhausted to improve quality of granules, which is important for PET/PA/PA6/PA66 materials.
Melt filtration: Non-stop piston type screen changer or black-flush filter are normally used in BOPET recycling pelletizing.
Automatic Under water Strands Pelletizing system:
1. High degree of automation: The automatic strands pelletizing system has a high degree of automation, reducing the need for manual operation and improving production efficiency.
2. Simple operation: The operation of the under-water strands pelletizing system is relatively simple, the process is stable, and the errors caused by manual operation are reduced.
3. Uniform granules quality: The under-water strands pelletizing system can control the uniform cooling of melted plastic, making the final plastic granules have regular shapes and uniform sizes, which is beneficial for subsequent processing and use.
4. Reduce waste loss: Compared to other methods, the process of under-water strands pelletizing system generates less waste, saving raw materials and reducing costs.
5. Strong adaptability: This under-water strands pelletizing system can handle various types of plastic materials, such as PEt, PA, PA6, PA66, etc., and can meet the granulation needs of different materials.
ACERETECH Machinery has provided over 10 complete sets of online recycling pelletizing machines for BOPET/BOPP films so far. If you are interested in this kind of recycling machine, please contact us!