Plastic Film Recycling Washing Line

1. Feeding & Crushing System

Feeding and Pre-shredding: Loose film is first fed into a crusher (typically a shredder or plastic granulator) to cut it into flakes sized 10–50 mm.

The production line uses a wet crusher, which sprays water during cutting to initiate the washing process and reduce heat buildup during shredding.

For higher throughput or heavily contaminated film, a heavy-duty single-shaft or twin-shaft shredder can be used to pre-shred the material before granulation.
The output at this stage is shredded film flakes, which are easier to convey and wash.

Key Features:

Compact structure with small footprintEnsures continuous and stable feedingFitted with D2 wear-resistant alloy blades for extended lifespanSpecially adapted for highly contaminated flexible film materials

2. Friction Washing Unit

The friction washer is a rotary cleaning machine—imagine a large, fast-spinning drum or shaft with paddles—that causes the plastic flakes to rub vigorously against a screen and against each other.

The combination of centrifugal force and water spray flings off contaminants such as paper labels, adhesives, and residual dirt.

Key Features:

Multi-zone friction cleaning design

Anti-wrapping mechanism protects machine and materials

Ensures strong cleaning power while maintaining film integrity

3: Sink-Float Separation Tank

Next, the material typically enters a float-sink separation tank, also known as a flotation tank.

This is a long water trough that uses the principle of density separation: plastic film (made of PE or PP) generally has a lower density and floats on the water surface, while heavier contaminant residues with higher density sink to the bottom.

In a film washing line, the film flakes are continuously skimmed or overflowed from the top of the tank and move forward, while the heavier debris is left behind and discharged.

Key Features:

Equipped with multiple rotating rollers for continuous impurity discharge

Efficient sludge removal system to prevent blockages

Stable, high-efficiency operation with enhanced decontamination results

4: Film Dewatering & Drying Machine

The screw press (dewatering machine) physically squeezes moisture out of the plastic.

It compresses the wet film flakes into a semi-molten output (as friction and pressure slightly heat the plastic).

This step can significantly reduce moisture content and even begin compacting the film material.

Key Features:

Centrifugal dewatering + screw squeezing + hot air drying Ensures stable semi-plasticized output quality Optimized for direct pelletizing applications

5:Finished product display

6: Pelletizing System Interface

Pelletizing (optional integration): In many cases, the ultimate goal is to convert the clean film flakes into plastic pellets for feeding into standard plastic manufacturing equipment.

In an integrated setup, the dried film flakes are fed from a hopper or directly from the dryer into a single-stage or twin-stage pelletizer. The extruder melts the plastic and forms pellets.

Cambodian

Russia

Southeast Asia

Hubei Province, China

Machine Configuration Adjustments:

Workshop Layout and Installation Planning:

Training and Commissioning Services:

After-Sales Support and Spare Parts:

Customization often goes down to the component level.

Boxin Machinery can adjust parameters such as the mesh size in the friction washer and the dwell time in the washing tank.

Modularity is a core feature of these production lines—you can typically add extra units.

Work closely with the supplier to identify which modules are critical for your specific needs.

The best suppliers won’t push unnecessary modules; instead, they’ll help you prioritize the ones essential to achieving your desired output quality.

Beyond the machinery itself, a good supplier will also assist in optimally integrating the production line into your facility.

You only need to provide a workshop layout or a simple drawing with dimensions.
Our designers can then create a machine layout diagram that shows the installation positions of each piece of equipment, the routing of pipes and wiring, and any required platforms or infrastructure.

This is extremely useful for buyers—it ensures that when the equipment arrives, you know exactly where to place it and can prepare the site in advance (e.g., pouring concrete pads or ensuring adequate drainage).

After delivery, a PE film washing line typically requires on-site assembly and fine-tuning.

Boxin Machinery offers commissioning support, including dispatching one or more engineers to your facility.

During commissioning, these experts will oversee installation—usually in collaboration with your local electricians, plumbers, and riggers—ensure all connections are correct, and run test batches to fine-tune the settings.

Once the production line is operational, the supplier’s role shifts to ongoing support. Boxin Machinery offers a rapid-response system to ensure their team can quickly address issues, including timely on-site service if needed.

In practice, if you encounter problems, you can contact them via WeChat, WhatsApp, email, etc., and they will guide your technicians through diagnostics.

If a part fails, the supplier can ship a replacement via express courier. It’s advisable to request a recommended spare parts list at the time of purchase—this typically includes shredder blades, screens, bearings, seals, and more.

Some buyers opt to order a starter kit of spare parts with the machine—especially high-wear items like blades, which will eventually need sharpening or replacement.
Boxin’s strategy is to maintain a robust inventory of spare parts, which is exactly what you want to see—it means less downtime waiting for parts to be manufactured.