The importance of PET quality in effective recycling

The importance of PET quality in effective recycling

By Avery Dennison Sustainability Team, Asia Pacific

Published on 29 May 2025

Plastic pollution is a global challenge, with PET bottles often landing in landfills or the ocean. While PET plastics are recyclable and valuable in creating a closed-loop system, ensuring the quality and cleanliness of these recyclables is absolutely critical. This blog explores the primary role high-quality, contamination-free PET plays in effective recycling, its impact on sustainability, and how label innovations are revolutionizing the process.

Understanding PET Plastic and Its Recycling Challenges

PET (Polyethylene Terephthalate) is a widely used plastic, especially in food-safe bottles, due to its strength, lightweight design, and recyclability. However, the recycling process isn’t as straightforward as dropping bottles into a bin. Without effective management and innovation in recycling methods, contaminants and subpar recycling strategies can compromise PET’s ability to be reused effectively. 

Notably, contamination is one of the biggest hurdles in achieving high-quality recycled PET (rPET). This contamination often comes from labels and adhesive residues, which, when not completely removed, lead to discolored and degraded recycled plastic flakes. For brands focused on creating food-grade rPET products (like new bottles), these contaminants can render the plastic unsuitable. 

Why PET Quality Matters for Food Grade Use

To create a true bottle-to-bottle recycling loop, the PET flake needs to be food grade, which means it must meet stringent purity and safety standards. Here’s why this matters:

  • Safety compliance: Low-quality recycled PET riddled with contaminants cannot safely hold food or beverages.
  • Recycling yields: High impurity levels reduce the amount of usable recycled material, wasting resources and increasing costs.
  • Sustainability goals: Top brands are committing to circular economy principles. Without clean PET, businesses risk falling short of their sustainability benchmarks.

Contamination-Free Recycling Starting With Label Removal

One critical aspect of minimizing contamination lies in how labels and adhesives behave during the recycling process. Traditional glue-based labels create challenges such as:

  • Adhesive residue sticking to PET flakes.
  • Difficulties in efficient separation during washing.
  • Compromised appearance and discoloration of recycled PET.

Clean and complete label removal is essential to prevent these issues. Enter AD CleanFlake™, game-changing technology that ensures labels are removed without leaving adhesive residue, enabling the production of high-quality, food-safe PET flakes every time. 

Cleanflake Labels, Sustainable labels
Recycleable Labels

AD CleanFlake™ Transforming PET Recycling

AD CleanFlake™ is designed with advanced adhesive technology that allows labels to wash off easily during the recycling process. Here’s why it stands out:

  • Specialized adhesive deactivates in flake wash baths, leaving no residue on the PET.
  • Labels float, while adhesive-free PET sinks, simplifying separation and producing pure recycled material.

Proven Success in Real Recycling Systems

One standout example comes from DUYTAN Recycling, Vietnam’s leading bottle-to-bottle recycler. DUYTAN faced issues with adhesive residues that reduced PET flake quality and operational efficiency. By adopting AD CleanFlake™:

  • They achieved 100% clean PET flakes, even under demanding conditions (lower temperatures and shorter wash cycles).
  • They improved production efficiency, eliminating the need for time-consuming manual label removal
  • They reduced energy use, aligning with their zero-waste mission.

As quoted by Hao, Lam Hoang, R&D Deputy Manager, “I’m highly impressed by the results of the wash test—100% recovery of PET flakes and complete removal of glue under our stricter washing conditions."

Benefits of Clean Label Recycling

Implementing innovative solutions like AD CleanFlake™ enables recyclers and brands to overcome major barriers in PET recycling. Specific benefits include:

  • Enhanced yield and quality: No adhesive residue means higher-quality PET flakes, meeting safety and aesthetic standards for food-grade use. 
  • Reduced production costs: Streamlined recycling processes lead to faster operations and labor savings. 
  • Energy savings: Unlike conventional labels, AD CleanFlake™ can be removed at lower wash temperatures, making the recycling process more energy-efficient. 
  • Environmental impact: AD CleanFlake™ enables true circularity by ensuring PET bottles continuously cycle back into new food-grade packaging, decreasing reliance on virgin plastics and preserving resources. 

Closing the Loop With PET Recycling Innovation

Recycling PET bottles is no longer just about waste reduction. It’s a chance to lead in sustainability, enhance product quality, and respond to growing eco-conscious consumer demand. Innovations like AD CleanFlake™ prove that even small changes in packaging design can solve big challenges in global recycling efforts. 

Are you ready to make your brand’s packaging part of the circular economy? Contact Avery Dennison today to explore how AD CleanFlake™ ensures recyclability without compromise, driving your sustainability goals forward with confidence. 

Discover how AD CleanFlake™ has built strong trust among both brands and recyclers.

DUYTAN Recycling

DUYTAN Recycling

The successful trials by Vietnam's leading recycler positions AD CleanFlake™ as a game-changer for PET bottle-to-bottle process, providing brands with a reliable recycling solution.

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Woolworths

Woolworths

Woolworths pioneers sustainability with CleanFlake™, advancing towards zero waste and promoting PET plastic recycling.

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