What recycled pellets can do
Recycled polyethylene (PE) pellets are highly suitable for blown film extrusion, provided they are processed correctly and matched to the right applications. When evaluating material reuse, it is important to understand the typical end products for recycled PE pellets. In the blown film sector, garbage bags and general packaging film are typical end products for recycled PE pellets. The quality and condition of the input material dictate the preparation required. Clean in-plant edge trim can be granulated directly without extensive pre-treatment. On the other hand, contaminated or printed film may need washing to remove inks, adhesives, or environmental dirt before it can be effectively reprocessed into usable pellets.
The SJ granulating range
To prepare film scrap for reuse, selecting the right size reduction equipment is essential for maintaining a steady material flow. Our SJ granulating range offers scalable throughput to match varying production volumes. The range starts with the SJ100 model, which processes 150–200 kg/h, making it ideal for smaller extrusion lines. For larger operations, the range scales up to the SJ150, capable of handling 450–500 kg/h. This ensures that your granulation step keeps pace with your blown film extruders without creating material bottlenecks in the production line.
Blend ratios and film quality
Achieving the right mechanical properties, such as tensile strength and tear resistance, in blown film requires careful formulation. The exact blend ratio of recycled pellets to virgin material depends on the specific film recipe and the final product requirements. Because these variables change significantly based on your specific application and performance targets, the optimal blend ratio must be confirmed with our engineers. They can evaluate your specific material inputs and output goals to provide precise formulation guidance for your blown film process.
Setting up a closed loop
Establishing a closed-loop recycling system in your plant begins with evaluating your specific scrap stream. If you are processing clean in-plant edge trim, it can be granulated directly and fed back into the extruder hopper. For post-consumer or heavily contaminated streams, additional washing steps are necessary to ensure pellet quality. When integrating granulators and extruders, or if you need details on specific auxiliary equipment, please confirm with our engineers to ensure a seamless setup.
| Model | Throughput (kg/h) |
|---|---|
| SJ100 | 150–200 |
| SJ150 | 450–500 |
Frequently asked questions
What are typical end products made from recycled PE pellets in blown film?
Garbage bags and general packaging film are typical end products for recycled PE pellets. These applications are well-suited for the material properties of reprocessed polyethylene.
Can all types of film scrap be granulated directly without pre-treatment?
Clean in-plant edge trim can be granulated directly, but contaminated or printed film may need washing first to remove impurities.
What is the throughput capacity range for the SJ granulators?
The SJ granulating range covers from the SJ100 at 150–200 kg/h up to the SJ150 at 450–500 kg/h.
How do I determine the correct blend ratio of recycled pellets for my film?
The blend ratio depends on the film recipe and final product, so it must be confirmed with our engineers to ensure optimal quality.
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