rPET (Recycled Polyethylene Terephthalate)

Quick Overview

rPET (recycled PET) is polyethylene terephthalate recovered from post-consumer plastic waste and reprocessed into new packaging. It is the most widely recycled plastic globally and a cornerstone of circular economy strategies for the packaging industry.

What is rPET?

rPET stands for recycled polyethylene terephthalate. It is obtained by collecting, sorting, cleaning, washing, and reprocessing post-consumer PET packaging (primarily bottles) into food-grade or non-food-grade flakes and pellets that can be used to manufacture new products.

Recycling Pathway

1. Collection of post-consumer PET waste (bottles, trays)
2. Sorting by color and polymer type (NIR optical sorting)
3. Grinding into flakes
4. Hot washing and caustic wash to remove labels, adhesives, and contaminants
5. Drying and pelletizing (extrusion into food-grade rPET pellets)

Food-Grade vs Non-Food-Grade

Food-grade rPET requires additional super-clean processing (vacuum decontamination at high temperature) and regulatory approval from authorities like EFSA (Europe) or FDA (USA) before it can be used for food-contact applications.

Non-food-grade rPET is suitable for textile fibers, strapping, thermoforming, and industrial applications without additional decontamination requirements.

Mechanical vs Chemical Recycling of PET

• Mechanical recycling: Physical reprocessing without changing polymer structure. Limited number of cycles before quality degrades.
• Chemical recycling: Depolymerizes PET back to monomers (PTA + MEG) then rebuilds to virgin-quality PET. Enables infinite recycling loops.

Market Significance

rPET is the most widely recycled plastic globally, driven by:

• EU regulation mandating minimum recycled content in PET bottles (30% by 2030)
• Brand sustainability commitments (Coca-Cola, Danone, Nestle targeting 50% recycled content)
• Lower carbon footprint: rPET produces up to 79% fewer emissions than virgin PET