The European PET Bottle Platform (EPBP) has launched an important new testing framework called the PET Circularity Test Protocol. This innovative tool is designed to model the performance of PET bottles across multiple recycling cycles, ensuring packaging design aligns with upcoming EU circularity and recyclability standards.

Source: Chemanalyst

Understanding the PET Circularity Test Protocol

This new protocol simulates repeated recycling loops, providing a deeper insight into how packaging materials degrade and function through extended reuse. It is expected to be instrumental in helping the packaging industry navigate the tightening regulations set by the European Union (EU).

The Circularity Test Protocol enhances EPBP's existing Design for Recyclability Test Protocol, which evaluates a PET bottle's initial recyclability. While the current protocol adheres to the EU's Packaging and Packaging Waste Regulation (PPWR)—requiring a minimum of 30% recycled content in PET bottles by 2030—the new protocol offers a broader, long-term perspective on material performance. It reflects the changing regulatory landscape, which emphasizes true circularity, ensuring materials maintain their quality for reuse across numerous life cycles.

Transitioning Between Protocols

EPBP will continue to support both the recyclability and circularity testing protocols during a transition phase. This approach provides companies with flexibility in validating their packaging while the industry adapts to more stringent standards. However, EPBP encourages the early adoption of the Circularity Test Protocol, warning that packaging meeting today's recyclability criteria may not suffice under future circularity requirements. To aid in this transition, the organization is engaging with industry stakeholders and plans to issue updated design guidelines that align with the new protocol.

Addressing Technical Challenges

A major technical issue tackled by the Circularity Test Protocol is the gradual decline in PET material quality through repeated mechanical recycling. While PET (polyethylene terephthalate) is renowned for its recyclability, its mechanical properties diminish with each recycling cycle. This degradation occurs as the polymer chains in PET break down over time, leading to reduced tensile strength, loss of transparency, and other quality issues.

Contamination during the recycling process can exacerbate this degradation, further limiting the material's reuse in high-performance applications.

Typically, PET can be mechanically recycled up to seven times, although the exact number varies based on factors such as contamination levels and specific end-use applications. By simulating multiple recycling loops, EPBP's new protocol assists stakeholders in identifying potential design flaws and quality loss earlier in the product lifecycle, fostering better material choices and promoting packaging innovation.

Conclusion

With this initiative, EPBP is solidifying its position as a key advocate for sustainable packaging practices, aligning the PET bottle industry with the goals of Europe's circular economy.