Jan 07 2023

5 Steps to Building Your Own Plastic Film Recycling Washing Line/Plant

Setting up a Plastic Film Recycling Washing Line—also called a plastic washing plant or waste plastic film wash plant / PE film facility—requires careful planning. From choosing the right shredder, washer, and dryer to designing an efficient plastic recycling system, every decision affects output quality and operating costs.This guide walks you through five essential steps to build a profitable, high-performance film recycling facility.

Before we explore each step in detail, it’s important to understand how a typical washing line operates so you can see where each decision fits in the bigger picture.


How a Plastic Film Recycling Washing Line Works


Understanding the overall process ensures you design an efficient system from the start. While configurations vary, most plastic film recycling plants follow these key stages:

  • Sorting & Preparation – Waste film is sorted manually or with optical sorters, with bale breakers for compacted loads.
  • Size Reduction – Shredders or crushers break plastics into smaller pieces for easier washing. Depending on your material type, you may choose a single shaft plastic shredder for uniform film reduction or a twin shaft plastic shredder for bulky, mixed, or heavily contaminated plastics.
  • Washing & Separation – Floating tanks, friction washers, and rinse systems remove contaminants and separate by density.
  • Drying – Centrifugal, squeeze, or hot air dryers remove excess moisture. Modern plastic drying systems are critical for reducing moisture to levels that ensure smooth extrusion and pelletizing.
  • Pelletizing – Clean, dry flakes are converted into pellets for reuse in manufacturing. A well-configured pelletizer ensures consistent pellet size and quality, directly impacting product performance in downstream applications.

This step-by-step workflow provides the foundation for planning your own system. Next, we’ll look at how to select and configure your washing line based on the type of plastic films you intend to process.





  1. Identify Film Types and Contamination Levels


    Choosing the right process starts with knowing your materials and their condition. Begin by defining the film types—HDPE, PE, PP, or PET—and assessing contamination levels, as these directly affect washing stages, drying needs, and plant layout.It’s also critical to separate different plastics before processing, since density, melting points, and chemical properties vary by material. Without proper separation, mixed polymers will affect pelletizing consistency and lower the final pellet quality.


    Contamination levels and typical configurations :

    • Low (e.g., clean packaging film) – Single friction washer, cold/warm rinse, standard drying.
    • Medium (e.g., post-consumer shopping bags) – Additional floating tanks, moderate chemical wash, higher drying capacity.
    • High (e.g., agricultural film recycling line) – Multi-stage friction washing, hot water with caustic soda, advanced filtration, high-power drying, and closed-loop water recycling.

    Reminder: high-concentration caustic soda can corrode equipment. Always use alkali-resistant materials such as stainless steel 304/316 or protective coatings for long-term durability.


    Example – Agricultural Films:

    Require multiple friction washers, extended floating tanks for soil and residue removal, wet shredding and squeeze drying to reduce moisture from ~50% to under 3%, plus water recycling to cut costs and improve sustainability.

    Once you have a clear picture of your input materials and contamination levels, you can move on to selecting the most suitable equipment for your washing line.

    Building Your Own Plastic Film Washing Line/Plant

  2. Select the Right Equipment


    You can group washing line equipment into core components and optional modules depending on material type and contamination level. To help you plan effectively, here’s a breakdown of core components and optional modules, along with when each is typically included :

    Core Components (Standard in Most Washing Lines)

    Component Function When to Include
    Shredders / Crushers
    Shredders / Crushers
    Reduce plastic into smaller, uniform flakes for easier cleaning. Always required at the start of the process.
    Friction Washers
    Friction Washers
    Use high-speed paddles to scrub dirt, sand, and organics from plastic flakes. Standard for film and rigid plastics with visible contamination.
    Sink-Float Tanks
    Sink-Float Tanks
    Separate plastics by density (e.g., PP/PE float, PET sinks). Needed when processing mixed-material streams.
    Hot Wash Tanks
    Hot Wash Tanks
    Remove glue, labels, and oily residues with heated water and detergents. Essential for PET bottles and food-contact packaging.
    Centrifugal Dryers & Squeeze Dryer
    Centrifugal Dryers
    Spin film to remove surface water before pelletizing or drying. With a special multi-stage screw design, the system efficiently squeezes moisture, reducing film water content to below 3% for stable processing. Standard in nearly all washing lines.

    While these core components form the backbone of every washing line, additional optional modules can be added to enhance efficiency, improve contamination removal, or optimize resource usage depending on the feedstock.


    Optional Modules for Added Efficiency

    Module Function When to Include
    Pre-wash Units Spray or agitate material to remove coarse dirt before shredding. For heavily soiled agricultural film and post-consumer bags.
    Label Removers Strip shrink-sleeve and wrap-around labels mechanically. For PET bottle recycling where label contamination is common.
    Water Filtration & Recycling Systems Filter, treat, and reuse process water to reduce consumption. For plants aiming to cut water usage and comply with wastewater regulations.
    Metal Detectors Detect and remove ferrous/non-ferrous metals before extrusion. For mixed rigid plastics and post-consumer feedstock.

    By carefully combining core equipment with the right optional modules, recyclers can maximize cleaning efficiency, minimize waste, and prepare higher-quality flakes for downstream extrusion or pelletizing.

    Once the right equipment is defined, the next step is to plan an efficient plant layout that ensures smooth material flow and operational reliability.

    Read also: Plastic Film Recycling : Challenges & Solutions

  3. Plan an Efficient Plant Layout


    A well-thought-out layout reduces operating costs and improves workflow. Arrange machines in a logical sequence to minimize handling and optimize production speed. Provide adequate space for maintenance and ensure smooth material flow from feeding to pelletizing.

    Water Recycling Integration:
    Install a closed-loop water system from the start to reduce freshwater use by up to 90% and maintain consistent washing quality. Components include filtration, dissolved air flotation, chemical dosing, and sludge dewatering.

    With the layout finalized, the next step is to bring your design to life through proper installation, ensuring every component works seamlessly together.

  4. Install Equipment Correctly


    Correct installation is key to maximizing performance from day one. Follow the planned layout, connect water, drainage, and power, then calibrate machines for your target material and throughput. Work with experienced suppliers to ensure proper installation, avoid delays, and minimize costly rework.

    Once installation is complete, it’s essential to test and fine-tune your washing line so it operates at its highest potential.

  5. Test and Optimize


    Ongoing testing helps fine-tune your system for peak efficiency. Run trial batches to adjust washing, drying, and pelletizing parameters. Monitor KPIs such as moisture content, contaminant removal rate, and pellet consistency. Fine-tuning can increase throughput and extend equipment life.

    After optimization, your washing line will be ready for consistent production, but you may still have questions about capacity, space, and maintenance—which we’ll address next.



FAQ – Plastic Film Recycling Washing Line


Addressing common questions helps you plan with confidence.

Q1: Can one washing line handle different plastics?

Yes, with the right separation tanks, screw design, and adjustable washing settings.


Q2: How much space is needed?

Compact layouts start at 200–300 m²; high-capacity lines need 500 m²+.Depending on customer needs, the plant can be arranged in Z, L, or U-shaped layouts to maximize space utilization and ensure smooth material flow.


Q3: Typical output capacity?

300–1,500+ kg/hr, depending on material, contamination, and setup.


Q4: Maintenance requirements?

Blade sharpening, lubrication, filter cleaning, sludge removal, and electrical inspections.


Looking ahead, new technologies are making washing lines more efficient, compact, and intelligent.




Future Trends in Plastic Film Recycling


Technology advances are shaping the next generation of washing lines.

  • AI optical sorting for faster material identification
  • Ultrasonic cleaning for stubborn labels
  • Modular systems to save floor space
  • Self-cleaning filters for uninterrupted operation
  • Smart monitoring for predictive maintenance

If you’re considering starting or upgrading a line, staying informed about these innovations can help you future-proof your investment.




Start Your Plastic Film Recycling Washing Line Project Today


Turn your recycling goals into reality with a tailored solution.Whether processing PE film, PP bags, packaging film, or heavily contaminated agricultural film, Genius offers turnkey Plastic Film Recycling Washing Line solutions—from shredding to pelletizing—customized for your capacity and plant size. Contact us for a detailed layout proposal and discover how to increase throughput, improve pellet quality, and reduce costs.

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