3 Steps To Build Your LDPE Film Washing Line/Plant

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Setting up a plastic film washing and recycling facility involves several critical steps. Here’s a detailed guide to help you navigate through the process efficiently:

LDPE film washing recycling line

1. Selecting the Appropriate Equipment for the Film Recycling Washing Line

Understanding Film Types and Contaminants:

There are numerous types of plastic films available in the market, such as high-density polyethylene (HDPE), low-density polyethylene (LDPE), and polypropylene (PP). Identifying the type of film you will be processing is crucial. Equally important is assessing the level and types of contaminants present, which can include soil, grease, stones, metals, and glue. This analysis is essential for designing a customized recycling line that effectively addresses specific impurities.

Key Machines for an LDPE Film Washing Recycling Line:

Shredder or Crusher:

Large and bulky PP and PE films need to be broken down into smaller flakes to facilitate easier washing and drying. This can be achieved using a single shaft or twin shaft shredder. Wet crushers are also popular as they integrate initial washing with crushing.

High Speed Friction Washer:

This machine removes most impurities using centrifugal force. The film material collides with rotor blades and a screen, effectively dislodging dirt, which is then discharged with the water.

Sinking/Floating Wash Tank:

This tank allows the film to undergo thorough washing. The varying water densities in the tank help separate contaminants, which sink to the bottom, while the cleaned film floats and is moved for further processing.

Centrifugal or Squeezer Drying:

It has 2 main ways to drying the washed and wet film. The humidity remains about 30%-40% before film drying,the higher moisture,the harder for pelletizing process.

A LDPE film squeezer is quite good  for drying the wet film, the final moisture is about 3% after using squeezing machine.

Film Centrifugal dryer is another way to dry the film, it is working by the force of centrifugation. Not only it is good for drying,but also good for cleaning again here.

Granulating Line or Pelletizing Machine:

After washing and drying, the film is converted into granules using a pelletizing machine. Options include a film compactor pelletizing line or a ration feeder granulating line. The resulting uniform granules are then suitable for packaging or blowing applications.

2. Preparing the Layout and Space for Your PP PE Film Washing Line

A well-thought-out layout is essential for optimizing space and ensuring smooth operations. The Retech team can assist in designing a layout that maximizes space efficiency while facilitating easy material storage and water discharge.

Considerations for Layout and Space:

Space Efficiency:

A compact and well-organized layout can significantly reduce the footprint of your recycling plant.

Material Flow:

Ensure that the flow of materials from one processing stage to the next is seamless to avoid bottlenecks.

Water Management:

Proper water discharge and recycling systems are essential to maintain cleanliness and environmental compliance.

LLDPE wrapping film

3. Installation and Testing of Your Film Washing Line

Before the arrival of the machinery, it’s imperative to have the necessary utilities in place. This includes adequate power supply, water, and gas connections to support the entire recycling operation.

Installation Steps:

Utility Setup:

Ensure all utility connections are ready and can handle the load of the recycling and pelletizing lines.

Professional Assistance:

If you have prior experience, you may set up the equipment yourself using guidelines provided by Retech. However, if needed, Retech can send professional engineers to provide door-to-door service, ensuring proper installation and optimal operation.


Conduct thorough testing of each machine to ensure it operates correctly.

Make any necessary adjustments to optimize performance and efficiency.

Train staff on the proper operation and maintenance of the equipment.

By following these steps and carefully considering each aspect of the setup, you can establish a successful and efficient plastic film washing and recycling facility. This not only contributes to environmental sustainability but also enhances the economic viability of plastic waste management.


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