As the UK's flexible plastic recycling system develops, the collection and recovery of PE film are receiving increasing attention. A 2026 flexible plastic collection trial in Wales collected more than 150 tonnes of material, with approximately 76% recycled and polymer purity reaching around 95%. As collection initiatives expand, recyclers may need to handle more plastic films from different sources, each with varying levels of contamination.

At the same time, UK recycling businesses are paying closer attention to washing and dewatering performance. For example, one UK LDPE film recycler was purchasing shredded film with a moisture content of approximately 15% and wanted to reduce it to 3–5% through further dewatering. The company had also shown interest in the GREENMAX PC350 dewatering machine. Another UK plastics recycler had identified a need to increase the processing capacity of its existing washing line.

These requirements highlight that PE film recycling involves more than collecting and shredding waste. Moisture control after washing and the preparation of material for further processing are equally important.

However, not all PE waste requires the same washing and dewatering process. Industrial production scrap, post-consumer packaging film and agricultural film can differ considerably in cleanliness, moisture content and feeding characteristics. Understanding these differences is the starting point when planning a polyethylene recycling line.

When Does PE Film Need Washing?

PE film comes from various sources, and its contamination level can vary considerably. Clean industrial packaging film and production offcuts are different from post-consumer packaging film and used agricultural film, so their recycling requirements are not necessarily the same.

When PE film contains dust, soil, labels or other contaminants, these impurities may affect extrusion stability, filtration performance and the quality of recycled pellets. Appropriate washing and dewatering processes help improve the condition of the material before pelletising.

For heavily contaminated film, additional washing stages may be required depending on the incoming material. A PE film washing line is not simply intended to make plastic look clean; its purpose is to prepare the material to meet the requirements of subsequent processing.

The configuration of a PE Film Washing Line should therefore be determined by the actual feedstock rather than based on a fixed equipment combination.

Why Is Dewatering Important After Washing?

For PE waste that requires wet washing, cleaning is only one part of the preparation process. Washed material may still retain considerable moisture, increasing the workload of subsequent drying and extrusion stages.

This is particularly relevant when processing flexible PE film. Its lightweight structure and large surface area can make moisture removal more challenging. Depending on the feedstock and production requirements, centrifugal dewatering, screw press dewatering or drying equipment can be incorporated into the recycling line.

For example, some LDPE film recycling operations use screw press dewatering after shredding and washing to further reduce the moisture content of the material. The appropriate equipment should be selected according to the material characteristics and the requirements of the next processing stage, rather than simply adding more dewatering equipment.

When selecting a PE recycling line, it is therefore important to consider not only washing performance but also whether the washed material can be consistently dewatered and prepared for extrusion.

From Washed PE to Recycled Pellets

After the necessary shredding, washing and dewatering stages, PE material that meets the feeding requirements can enter an extrusion and pelletising system.

During extrusion, the plastic is heated and melted as it moves through the screw, forming a molten polymer. The melt then passes through a filtration system to remove remaining impurities before being cut into recycled plastic pellets.

The condition of the incoming material directly affects extrusion stability. Excessive contamination may increase the load on the filtration system, while high moisture content may require adjustments to processing conditions.

A PE pelletizer machine or polyethylene extruder should therefore be selected according to the material type, feeding condition and required pellet quality. Equipment designed for rigid PE scrap may not be suitable for lightweight film without appropriate feeding and pre-treatment arrangements.

Different extrusion technologies also have different applications. Single-screw and twin-screw systems vary in configuration and processing characteristics, so the choice should be based on the actual feedstock and production requirements rather than the polymer name alone.

For more information about PE Pelletising Machines, explore the equipment options available for processing polyethylene waste into recycled pellets.

PE Film, Rigid PE and PE Foam Require Different Recycling Processes

Although PE film, rigid PE and EPE foam are all polyethylene-based materials, their physical characteristics and recycling requirements differ.

PE film is lightweight and flexible, so processing needs to account for material wrapping, contamination, moisture removal and stable feeding. Rigid PE scrap requires greater attention to shredding size, material consistency and impurity control before extrusion.

EPE foam follows a different recycling route because of its low density and large volume. Volume reduction is usually the first consideration before further processing.

There is therefore no single recycling process suitable for every type of polyethylene waste. When considering how to recycle polyethylene, the material form, contamination level and intended output should determine the equipment configuration.

GREENMAX PE Recycling Equipment Solutions

Different types of PE waste require different processing arrangements. GREENMAX provides equipment solutions for polyethylene recycling, including shredding, film washing, dewatering and pelletising systems, configured according to the feedstock characteristics, contamination level, processing capacity and final product requirements.

For contaminated PE film, a suitable combination of shredding, washing and dewatering equipment can prepare the material for subsequent extrusion and pelletising. For clean industrial PE scrap, the pre-treatment process can be simplified according to its size and feeding condition before it enters the appropriate pelletising system.

By matching pre-treatment equipment with the extrusion and pelletising stages, GREENMAX helps recycling businesses establish PE recycling lines suited to their actual feedstock and production requirements, turning waste polyethylene into reusable recycled pellets.

For a broader overview of polyethylene recycling, explore the different processing methods and equipment options available for recovering polyethylene waste.