Multilayer Flexible Film Recycling

Breakthrough Recycling Breakthrough: How Multilayer Flexible Film Can Revolutionize Sustainable Packaging

Flexible plastic packaging—from grocery wrap to multi-layer food pouches—has long represented one of the most stubborn challenges in modern waste management. While lightweight and efficient for protecting goods, these complex materials traditionally end up in landfills due to sorting difficulties and cross-contamination.

However, recent landmark research conducted by Plastics Forming Enterprises (PFE) alongside the Flexible Film Recycling Alliance (FFRA) and Ridwell demonstrates a major technical breakthrough: post-consumer multilayer flexible films collected directly from households are technically feasible to recycle at commercial scale.  Multilayer Flexible Film Recycling

By establishing smarter sorting protocols and matching recycled materials to appropriate manufacturing methods, the packaging sector can convert hard-to-recycle films into valuable secondary raw materials.

The Sorting Challenge: Separating Food vs. Non-Food Streams

The key to successful flexible film recovery lies in early material classification. Post-consumer residential collections naturally contain varying levels of organic residue, paper labels, and complex multi-material layers.  Multilayer Flexible Film Recycling

During the study, incoming bales of polyethylene (PE) film were sorted into two primary channels:

• Non-Food-Contact Stream (77% of recovered volume): Included clean protective wrap, shipping bags, and non-perishable packaging. This stream achieved an impressive 90.6% yield during processing.

• Food-Contact Stream (23% of recovered volume): Included pet food bags and food barrier wraps. Due to organic residue and tight multilayer bonds, this stream achieved an 80% yield.

                  POST-CONSUMER BALE SEPARATION
                                 |
        +------------------------+------------------------+
        |                                                 |
        v                                                 v
Non-Food Contact (77%)                           Food Contact (23%)
  • 90.6% Processing Yield                         • 80.0% Processing Yield
  • Standard Screen Filtration                     • Coarse Screen Filtration Required
  • Suitable for Blown Film                        • Ideal for Injection Molding

Overcoming the Extrusion Filtration Barrier

When mechanical recyclers melt down plastic waste, the material must pass through mesh screen packs to filter out un-melted polymers, paper fibers, and particulates. Multilayer Flexible Film Recycling

Testing demonstrated that non-food-contact PE film handles standard fine mesh filtration (20/40/150/40/20 mesh) with ease, producing clean, uniform resin pellets. Conversely, food-contact streams caused high melt pressures during extrusion, triggering automated safety shutdowns.  Multilayer Flexible Film Recycling

To process food-contact film, technicians used wider, coarser screen packs (20/40/20 mesh). While this modification permitted smooth pellet production, it allowed microscopic contaminants to remain inside the recycled resin. Recognizing this distinction is critical for downstream manufacturers when selecting post-consumer recycled (PCR) feedstocks.

Matching Recycled Resins to the Right End Market

Not all recycled applications require pristine virgin-grade purity. The true power of modern circular economy design is matching material properties to the right manufacturing process.

1. Blown Film Applications (High-Purity Demand)

Blown film manufacturing—used to make thin plastic bags, agricultural sheets, and stretch wrap—requires high melt stability and zero particulate defects.  Multilayer Flexible Film Recycling

• Washed Non-Food Film: Successfully produced stable blown film at up to 50% PCR concentration.

• Unwashed Non-Food Film: Maintained bubble stability at 25% PCR concentration.

• Food-Contact Film: Struggled to maintain film stability due to micro-contaminants, indicating that film-to-film recycling for this stream requires advanced wash systems or chemical recycling technologies.

2. Injection Molding (High Contamination Tolerance)

Where blown film encounters limits, injection molding presents an ideal solution. All evaluated streams—including food-contact resin and unwashed mixed industry blends—were successfully molded into high-strength test specimens at 100% recycled content.

Testing confirmed that molded specimens retained excellent tensile strength, flexural stability, and impact resistance. This opens massive market opportunities for transforming discarded films into durable goods such as:

• Shipping pallets and transport totes

• Construction materials and protective dunnage

• Landscaping products and heavy-duty storage containers  Multilayer Flexible Film Recycling

A Clear Roadmap for Sustainable Packaging Growth

This research delivers a clear operational strategy for municipal collectors, recyclers, and brand owners:

1. Prioritize Targeted Collection: Specialized residential recovery programs (like subscription-based curbside pickups) yield high-quality feedstocks compared to unsorted mixed waste.

2. Implement Water-Based Washing: Gentle agitation washing significantly improves PCR purity and downstream performance without requiring harsh chemical additives.

3. Diversify End Markets: Direct high-purity non-food films back into film manufacturing, while routing complex food-contact films toward durable molded products.

By aligning collection infrastructure with downstream manufacturing capabilities, the packaging industry can close the loop on flexible films, significantly reduce virgin plastic consumption, and build a resilient circular economy.  Multilayer Flexible Film Recycling

PureCycle Technologies and TOPPAN Accelerate Sustainable Packaging Revolution with High-Performance Recycled Content Solutions for Flexible Films and Thermoformed Food Applications

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